US2662387A

US2662387A - Door lock

Info

Publication number: US2662387A
Application number: US198557A
Authority: US
Inventors: Hagstrom Gotthard
Original assignee: SAFE PADLOCK AND HARDWARE COMP
Current assignee: SAFE PADLOCK AND HARDWARE Co; SAFE PADLOCK AND HARDWARE COMP
Priority date: 1950-12-01
Filing date: 1950-12-01
Publication date: 1953-12-15
Anticipated expiration: 1970-12-15

Description

G. HAGSTROM DOOR LOCK 4 Sheets-Sheet 1 Filed D90. 1, 1950 *5 E INVENTOR ATTORNEY G. HAGSTROM Dec. 15, 1953 DOOR LOCK 4 Sheets-Sheet 2 Filed Dec. 1, 1950 m m V m ATTORNEYa.

Dec. 15, 1953 G. HAGSTROM 2,662,387

4 nooamcx.

Filed Dec. 1, 1950 4 Sheets-Sheet 3 G. HAGSTROM Dec. 15, 1953 DOOR LOCK 4 Sheets-Sheet 4 Filed Dec. 1, 1950 INVENTOR.

ATTORNEY Patented Dec. 15, 1953 UNITED STATES ATENT OFFICE DOOR LOCK Application December 1, 1950, Serial No. 198,557

29 Claims.

The invention relates to certain improvements in a door lock; and the nature and objects of the invention will be readily recognized by those skilled in the art in the light of the following explanation and detailed description of the accompanying drawings illustrating what I now believe to be the preferred embodiments or mechanical expressions of the invention from among various other embodiments, modifications, variations, combinations and constructions, of which the invention is capable within the broad spirit and scope thereof as defined by the claims hereto appended.

Primarily my invention is directed to those general types or classes of door lock units or sets used mainly for outside doors, and which are characterized by a cylinder lock mounted in the outer knob with a manually operable push button or the like member mounted in the inner knob by the selective operation of which the outer knob may be either connected with the latch bolt retracting spindle for latch bolt actuation by the outer knob, or by which the outer knob may be disconnected from the spindle and locked against rotation, so that, the spindle may then be rotated for latch bolt retraction only by key operation of the outer knob mounted lock unit. Door locks of this general class or type are in general use but their design and construction is mechanically and. structurally complicated, with high cost of manufacture and with operating and maintenance difficulties in door installed operation and use.

One of the primary objects of my invention is to provide a design and construction of such type of door lock which is extremely simple structurally and mechanically, with a minimum number of parts designed for ready manufacture and ease of assembly, so that, the ultimate cost of such a door lock unit or set to the user may be substantially reduced.

Another object is to provide such a low cost mechanically efiicient design and construction which will provide a door lock unit capable of efficient, precision operation with a minimum of operational or structural failures over a long life i dle, under the selective control of the inner knob mounted push button.

A further object is to provide for simultaneous declutching of the outer knob from the bolt retracting spindle and locking of the outer knob against rotation, or conversely, simultaneous unlocking of the outer knob and clutching of such knob to the bolt retracting spindle.

Another object is to provide mechanism for automatically releasing the outer knob from the locked position thereof declutched from the latch bolt retracting spindle, by either the rotation of the inner knob or key operation of the outer knob mounted cylinder lock unit.

Another object is to provide means by which the automatic releasing mechanism may be rendered inactive, so that the outer knob will remain in latched position, declutched from the bolt retracting spindle, when either the spindle is rotated by the inner knob or is rotated by key op- 1Elation of the cylinder lock unit in the outer A further object is to provide a mechanically simple means for looking or latching the outer knob to a fixed plate on the door, comprising locking balls cammed radially outwardly into locking position by moving of a clutch member for clutching and declutching the outer knob to and from the latch bolt retracting spindle.

A further object is to provide a design and construction of the outer knob mounted cylinder look, by which the cylinder plug of the lock may be readily removed without the use of special keys or other implements, but merely by the partial disassembly and removal of the door lock set from installed position on a door, followed by simple manual manipulation of the cylinder plug and associated mechanism.

With the foregoing and various other objects, features and results in view, which other objects, features and results will be readily apparent from the following detailed description, my invention consists in certain novel features in design and construction, and in combinations and sub-coinbinations of parts and elements, all as will be more fully referred to and specified hereinafter.

Reierrrog to the accompanying ngs, in which similar reference characters re r to corresponding parts and elements throughout the several figures thereof:

Fig. 1 is a view in horizontal section through a portion of a door with a lock unit or set of the preferred form of my invention installed thereon, the lock unit and latch bolt unit associated therewith being shown in top plan.

Fig. 2 is a View in vertical section taken as on 3 the line 2-2 of Fig. 1, the outer knob locking mechanism and operating button member therefor being shown in projected, outer knob releasing position.

Fig. 3 is a. view in horizontal, longitudinal section through the mounted door lock unit of Fig. 1, taken as on the line 33 of Fig. 2.

Fig. l is a view in horizontal, longitudinal section similar to Fig. 3, but showing the outer knob locking mechanism in depressed, outer knob locking position.

Fig. 5 is a view in horizontal longitudinal section similar to Figs. 3 and 4, taken through another modified form of door lock unit, in which provision for releasably catching the button operated push rod in its depressed, outer knob latching position, is eliminated.

Fig. 6 is a view in transverse section taken as on the line B6 of Fig. 2.

Fig. '7 is a view in transverse section taken as on the line of Fig. 2.

Fig. 8 is a transverse sectional view taken as on the line 88 of Fig. 1.

Fig. 9 is a transverse sectional view taken on the line 9-9 of Fig. 2.

Fig. 10 is a transverse sectional view taken on the line lill of Fig. 2.

Fig. 11 is a transverse sectional view taken on the line lill of Fig. 2.

Fig. 12 is a transverse sectional view taken on the line i2-l2 of Fig. 2.

Fig. 13 is a transverse sectional view taken on the line l3l3 of Fig. 2.

Fig. 1% is a transverse sectional View taken on the line I i-A i of Fig. 2.

Fig. 15 is a transverse sectional view taken on the line ll5 of Fig. 2.

Fig. 16 is a transverse sectional view taken as on the line lE-i6 of Fig. 2.

Fig. 1''! is an exploded view or" the door lock and latch bolt units of Fig. 1, showing the parts of such units in perspective in separated relation.

I have selected and disclosed herein as examples, several embodiments of door lock sets or units embodying the principles and various features of my present invention. The disclosed embodiments have been selected primarily for purposes of explaining the several features of the invention and not by way of limitations in all respects to the specific constructions of the example embodiments, or to the general types or classes of door lock units in which such embodiments have been incorporated. The door lock unit or set of each embodiment is shown as associated with a tubular latch bolt unit, and comprises a rotatable spindle, mounting thereon inner and outer knob units by which the spindle may be rotated from either the inside or the outside of the door to retract the latch bolt of the latch unit for door opening in the general manner familiar in this art.

In terms of my present invention, each of these example embodiments is characterized generally by a key operated cylinder lock of the pin tumbler type mounted in the outer knob unit; outer knob locking mechanism operable selectively from the inside of a door to either connect the outer knob to the spindle for spindle rotation thereby, or to disconnect such knob from the spindle and lock the knob against turning, with the spindle then being rotatable from the outside of the door only by key operation of the knob mounted cylinder lock; and a push button member mounted on the inner knob in operative association with the outer knob latching mechanism for effecting operation of that mechanism to either connect the outer knob to the spindle or to disconnect the knob from the spindle and lock the knob against hand rotation or turning.

In one of the example embodiments, which may be taken for present purposes of this disclosure as the preferred embodiment, the inner knob mounted button member when in its projected position effects connection of the outer knob to the spindle and when in its depressed position eiiects disconnection of the outer knob from the spindle and the locking of such knob against rotation. In this embodiment, the button member and outer knob latching mechanism when the button is in depressed position are releasably held automatically in such position but are released automatically to button projected position by either rotation of the inner knob or by key operation of the outer knob mounted look. This embodiment also includes means by which the button member and the outer knob latching mechanism can be releasably held in depressed, outer knob latching positions, so that, rotation of the inner knob or key operation of the outer knob mounted lock will not effect automatic release and resulting unlatching of the outer knob. Such means permits of manual operation selectively by the operator to either effect locking of the button member against automatic actuation of the outer knob latching mechanism or to restore such mechanism and button member for automatic functioning to release from outer knob latching position by inner knob rotation or key operation of the outer knob mounted lock.

In another of the example embodiments hereof, the provision for retaining or locking the button member in its depressed, outer knob locking position, is eliminated, so that the button member is always released automatically from its depressed, outer knob locking position by either rotation of the inner knob or key operation of the cylinder lock in the outer knob.

In the other of the example embodiments, the provision for retaining and locking the button member in its depressed, outer knob locking position whenever it is depressed from projected position and for automatically restoring the button from depressed to projected position unlatching the outer knob, upon either inner knob rotation or operation of the outer knob mounted lock, is eliminated. However, provision is made in this embodiment for manually locking the button member in its depressed position to maintain the outer knob locked against rotation under all conditions of operation of either the inner knob or the lock in the outer knob, with the button mem-- ber being only releasable from depressed, outer knob locking position by manual operation thereof by the operator.

In the example embodiment as disclosed in Figs. 1 to 3, and which is offered here as the preferred embodiment, the door lock unit or set is shown in Fig. l in mounted and installed position on a door D in operative association with a tubular latch bolt unit L. The door lock unit or set includes the spindle it] of square or angular section, which is mounted in position extended through a transverse bore or passage 2 formed through the door, with an inner knob unit I mounted on the spindle end at the inner side of door D and an outer knob unit 0 mounted on the spindle end at the outer side of the door. The tubular latch bolt unit L of this example is mounted in the door D in a suitable bored or mortised opening 3 formed therein and opening through the outer free edge of the door D, with the unit L being disposed in position with its longitudinal axis perpendicular to the axis of spindle iii and with the spindle being extended transversely through latch bolt unit L in operative connection therewith for retracting the latch bolt B of unit L upon rotation of the spindle by either inner knob unit 1 or outer knob unit 0, in the manner generally familiar in this art. Referring to Figs. 8 and 17, the latch bolt unit L is of the tubular type and includes a roll-back 5 having a squared opening through which spindle i6 extends and is engaged, a spring loaded yoke 53 reciprocally mounted in the unit and operatively connecting the rollback 5 with the latch bolt B, which latch bolt is reciprocally mounted in the unit for projection and retraction through one end thereof to be engaged in or disengaged from the usual keeper of a striire plate '3 (see Fig. l). The latch bolt 3 is spring loaded and in the usual manner of the is depressible independently of yoke but retractible by the yoke.

The structure for mounting a door lock unit or set on the door D in accordance with my invention, provides for ready adjustment of the unit to doors of varying thicknesses, and, in this instance, comprises a back plate I l located on the inner side of the door across spindle receiving bore 2, and a lock plate 28 located at the outer side of the door across the outer end of spindle receiving bore The back plate i i is provided with a bore Ha having an internal diameter greater than the external diameter of spindle is, for receiving the spindle in position extended therethrough. The lock plate 29 is formed with a hub or collar-forming, annular flange 2d extended from the outer side thereof and providing a bore therethrough and through the plate for receiving the outer end length of the spindle it which extends therethrough in assembled position of the unit. The internal diameter of the hub or collar 2 of lock plate 26 is substantially greater than the external diameter of spindle In for a purpose to be hereinafter referred to in detail.

The lock plate 2t includes the spaced, generally parallel arms 25 extended laterally inwardly from the inner side of plate 2i] at opposite sides of the spindle receiving bore through the plate, with these arms being extended into the bore or passage 2 in door D. The arms 2| are provided at their inner ends with the inwardly facing, spaced positionin flanges 22 between which the latch bolt unit L is received. The inner ends of arms 2! are provided with lugs 23 bent inwardly therefrom and being disposed generally parallel with the body of plate 29. Each of the lugs is provided with a tapped bore 223a therethrough (see Fig. 17) having its axis generally parallel with the axis of the bore through plate Ell. The back plate H and the lock plate 2? in mounted positions are connected and drawn tightly together against the outer and inner sides of door D over and across the adjacent end openings, respectively, of the bore or passage 2, by the threaded and headed bolts or long screws l2 which are extended inwardly through smooth Wall bores l in (see Fig. 17) formed in back plate M, with the threaded inner ends of the screws being threaded into the tapped bores 23a, respectively, of lugs 23 of the lock plate Ell. Thus, by such construction and arrangement of back plate ii, lock plate 29 and fastening screws 12, a lock unit may be readily mounted on doors of varying thicknesses by merely threading screws it the required distances into or from the lugs 23 to draw plates II and 26] inwardly toward each other to securely clamp the plates on and against opposite sides of the door in accordance with the door thickness.

An inner rose i i is provided for mounting on and over the opposite ends of back plate II by a pressed or snap fit, while an outer rose i 5 is provided for mounting on and over the opposite ends of lock plate 28 by snap or pressed fit. With the inner and outer roses M and i5 in mounted positions attached on plates l i and 2d, the ends of the spindle receiving bore 2, the plates and the fastening screws l2, are all enclosed within and concealed from view by the roses.

The spindle is, which in this instance is of square section is externally threaded along its inner end length and the inner knob unit I is threaded onto and locired in position thereon. In this example, inner knob unit I includes a hub member or insert 35% having an internally threaded axial bore 380: therethrough by which this hub or insert member is threaded onto spindle iii, The hub member 3B is formed with a tapped, radial bore therethrough into which is threaded a lock or set screw 35 for releasably locking the hub member knob unit in the desired posi tion of adjustment axially of spindle iii. The inner knob unit includes an annular shank 32 which is secured on and around hub member 38, with the inner end of the shank bent radially inwardly over and around the inner end of the hub member. The inner rose Id is formed with an axial bore therethrough having an inturned, annular flange i i-a therearound which defines and provides a, bearing member into which is rotatably received the inner end of hub member and the inturned nange portion of the shank 32. The inner end of hub member and the inturned flange portion of shank 52 secured therearound are of reduced external diameter relative to the hub member and the shank. Shank 32 of knob unit I is flared radially outwardly and has its outer, annular edge portion formed to provide a. flange therearound into which the inner annular edge of the knob forming cap 33 is secured. Knob-forming cap 33 is formed at its outer side with an axial bore 33a therethrough in axial alignment with spindle it.

The inner knob unit I mounts the button member til by which the mechanism for connecting the outer knob to the spindle iii and for disconnecting such knob from the spindle and latching the knob to the lock plate against rotation, is selectively manually controlled by the operator. In this example, in accordance with my invention, the button member til is operatively connected with such mechanism thr h the medium of a push rod or plunger 5i? which is reciprocally mounted in and extends through an axial bore Elia extending through spindle it; from end to end thereof. This push rod Ed is formed at its outer end with an enlarged external diameter head 5i which is provided with external threading 52 having the lead as the external threading of spindle id. The external diameter of the threading 52 of head is slightly less than the internal threading of the bore 5553a of hub member so, so that, the head as ma slip freely through the hub member bore. The outer end portion of hub member as is formed of reduced external diameter and a cylinder-forming tube 53 is secured in position at its inner end on and over such reduced diameter portion of hub member 30. Tube 53 is of a length to extend outwardly into the cap member 33 of the knob unit I to the inner side of the cap member around and surrounding the button receiving bore 33a in the outer side wall thereof.

The button member 40 is of tubular form open at one end and closed at the opposite end by an end wall llld formed to provide thereacross a transverse rib 45b to provide a finger grip to facilitate turning or rotation of the button memher. The button member MI is provided with diametrically opposite bores 400 through the side wall thereof, as will be clear by reference to Figs. 2 and 17. The button member 40 is mounted in a sleeve member il which is open at one end for receiving therein the button member in telescopic relation therewith. Sleeve member 4| is closed at its opposite end by an end wall 2 having an internally threaded, axial bore 42a therethrough into which the externally threaded head 5! of push rod 58 is threaded to thereby adjustably attach the sleeve ii and its contained button 49 to the push rod 58. In assembled position button 48 is secured in sleeve ll against displacement with the closed end of the button member provided with the finger grip 1 b outermost and the inner open end of the button member located at the inner side of end wall 42 of the sleeve 4|.

In this example, I secure button member 4E in position in sleeve 4! by means of a U-shaped sertcd in button member 40 with the closed end thereof located at the closed end of the button, and with the fingers 44a and 44b thereof received in the diametrically opposite bores 1-00, respectively, of the button member. The circular side wall as of sleeve 4 I, referring now to Fig. 17, is provided with a bore 430: through a side wall thereof. Diametrically opposite bore 5311 the side wall 43 of sleeve ll is provided with an axially disposed slot 43?) which extends from end to end of the sleeve, so that, it opens at its opposite ends through the forward end edge of the sleeve and through the rear face of the end wall 52 of the sleeve. The long finger 44a of the button retaining member in is of a length to project outwardly through the side wall of the button, and r in mounted, assembled position of the button member the finger 44a engages in the side wall bore fllta of sleeve 4! to thereby retain the button member in the sleeve against displacement. The side wall 53 of sleeve 4! is cut away or recessed to form what is in effect a circumferentially disposed, bayonet slot 35 perpendicular to and opening at one end into the slot 43b. The slot 45 provides along its inner side a guiding edge or shoulder like, as clearly shown in Fig. 17.

The sleeve d! is slidably mounted and confined in the outer end of the tube 53, which extends between inner knob hub member 39 and the end wall of the knob, cap with the button member til positioned projected outwardly through the bore or opening 33a in the cap. The push rod 50 extends outwardly into tube 53 with the threaded head thereof threaded into the bore 42a of the end wall of the button mounting sleeve. Thus, sleeve and button member 40 are reciprocal in tube 53 as a unit to project and retract the push rod 53 connected thereto.

In this example embodiment of my invention, I provide for rotation of sleeve M as a unit with button member 4!! in tube 53 on and relative to tube push rod 50. The rotation provided for is a 11mited one and amounts to approximately a quarter turn counterclockwise of the button when depressed to rotate it to locked position and a quarter turn clockwise to rotate it from locked position. The limitation and confining of this rotary movement is effected through the medium of a finger or lug 45 which is bent inwardly from the side wall of tube 53 and which is engageable in the slots 43b and 45 formed in the side wall of sleeve ill (see Figs. 2 and 17). In normal operation, lug 36 is received in slot 431) and confines the button member and its mounting sleeve M to straight line reciprocation axially in tube 53 as the button and push rod 50 are depressed or projected. When button member 40 and sleeve 6| are in depressed position, the slot 45 of sleeve M is aligned with the lug 4B of tube 53. Hence, if it is desired to lock or hold the button memher and push rod 58 in depressed position, it is only necessary to rotate button member 40 and sleeve ii counter-clockwise, so that lug 46 then moves into slot is and upon release of the button member will be engaged by shoulder 45a to prevent projection or outward displacement of the assembly of push rod 58, sleeve 4| and the button member. Clockwise rotation of the button memher do from this locked position wil return sleeve 4! to position with the slot 43b thereof lined up with lug it, so that, the button member and its sleeve together with push rod 50, may then move outwardly as a unit in tube 53 to projected posi tion with push rod 5% retracted.

The button member 40, sleeve 4| and push rod 58 connected therewith, are continuously biased outwardiy through tube 53 to the projected position of button member 48 and the retracted position of push rod 56, as shown in Fig. 3, by the biasing springs 55' and 55. Spring is a coil spring mounted in position in tube 53 under comression between the outer end of hub member and the inner side of end wall 42 of button mounting sleeve ii. Spring d5 has an external diameter to slidably engage the inner surface of 555. Spring thus continuously acts to project sleeve 41 outwardly to position with the outer open end edge thereof engaged against the under side of cap 33 which forms a limiting stop therefor. The spring 55 is of the coil type having an internal diameter to fit over and slidably engage push rod 50, and is mounted on the push rod under compression between the outer end of spindle It and the annular shoulder presented by the inner end of the externally threaded head 55 of push rod 50. It will thus be noted that sleeve 4! can be threaded axially of push rod. to toward and from spindle l0 and knob hub 39 without thereby varying the distance between the inner end of head 5| and the outer end of spindle it, so that, adjustments of the knob unit I and button it, on and relative to spindle it, may be made without varying the degree of compression of spring 55. Springs and 55 thus together load sleeve 4! and push rod 56 to continuously bias these members with the button member is, outwardly to normal projected position thereof. Button member 4a and sleeve 4! may be depressed as a unit from projected position to thereby force push rod 58 inwardly, against the combined forces of the

springs

45 and 55.

Attention is here directed to the fact that by providing the external threading 52 of head 5| of the push rod with the same lead as the threading of spindle II] in knob hub member 30, the same spacing with button 40 in projected position is maintained between spindle lll and the inner end wall 42 of sleeve 4!, irrespective of the axial position of adjustment of inner knob unit I on spindle iii. In this manner the maximum position of projection of button All outwardly from knob unit I will remain the same in any position of adjustment of the knob unit on spindle id to meet the conditions of installation on doors of different thicknesses.

The outer knob unit includes an insert sleeve (it on which the annular shank 6! of the knob unit is secured with the sleeve member extended outwardly a distance beyond this shank. Shank Si is radially outwardly flared and has secured to the outer annular edge flange thereof the knob cap 62. Knob cap 62 is provided with an axial, circular opening 62a therethrough in axial alignment with the inner end of the hub-forming, insert sleeve til. Sleeve cs terminates at its outer end within cap 62 spaced a distance inwardly from the inner side of the outer end wall of the cap. The knob unit 0 with the lock unit in mounted, installed position on the door D, has the outwardly projected length of hub-forming sleeve 68 of the knob unit extended through an axial opening its formed through outer rose is, and through the lock plate 23], with the insert sleeve Elli rotatably received in and extended through the hub forming flange 2 of the lock plate. In this mounted position, the spindle ill extends a distance into knob insert sleeve 6%, which sleeve has an internal diameter greater than the maximum effective external diameter of the spindle. Referring now to Fig. 1'7, in connection with Figs. 2 and 3, the open inner end of knob insert sleeve on which receives the spindle ill, is provided with an inturned flange portion which provides at its opposite ends the clutch teeth forming shoulders 65. The radial depth of the flange B5 is such that the flange is spaced from and does not en age spindle iii, so that the spindle and the knob unit 0 with its insert sleeve G9, are rotatable relative to each other in the absence of connecting means therebetween.

The outer knob unit 0 may be secured against inward displacement on spindle iii, by a retaining ring iiilb removably mounted on the spindle at the inner end or insert sleeve Ring Sill) may be seated in suitable notches Etc formed in the spindle id. Displacement of knob unit 0 outwardly on spindle It may be restrained by a suitable ring secured in an annular seating groove tile formed around insert sleeve 6% at the inner side of lock plate (see Figs. 2 and 1*?) By my present invention I have provided a clutching mechanism actuated by push rod under the control of the button member til, for bly connecting the insert sleeve is of the out knob unit 0 with the spindle it, so that rotation of knob O in either direction will effect rotation of spindle it to retract latch bolt B of the latch bolt unit L. In the examples hereof, I have expressed th s mechanism in the form of a clutch sleeve 'lil having a squared, axial passage 'Ei therethrough which is dimensioned to slidably receive the square section spindle Id. sleeve to is of circular external contour and slidably mounted on spindle it for rotation with that spindle in any position of adjustment axially of the clutch sleeve on the spindle. Referring to l'l, in connection with Fig. 13, clutch sleeve to at the inner end thereof is cut away across one thereof for a distance inwardly from the rear or inner edge of the sleeve to provide the spaced clutch teeth forming shoulders or edges 52, which Clutch 10 are complementary to and adapted to be engaged with the clutch teeth-forming shoulders 66 at the inner end of knob insert sleeve Gil.

The clutch sleeve it is mounted on spindle id in position located within the knob insert sleeve til with the cutaway end thereof which provides the clutch teeth-forming shoulder 52, inn rrnost and adjacent the clutch teeth-forming shoulders 66 the inner end or" insert sleeve ti Clutch sleeve it has an external diameter such that it may be freely moved axially of spindle ill within insert sleeve as, between a position moved rearwardly with shoulder thereof engaged With shoulders 35, respectively, at the inner end of insert sleeve to, and a position moved outwardly on th spindle with the shoulders "62 completely disengaged from shoulders of the insert sleeve. When the clutch sleeve it is in its inwardly moved position in clutching engagement with insert sleeve til, the outer knob unit 0 is then connected with spindle iii through the engagement of the squar section spindle in the square passage ll of clutch sleeve "50, so that rotation of the outer knob unit 0 in either direction will correspondingly rotate the spindle I E3 to thereby retract latch bolt B. When clutch sleeve it is displaced outwardly on spindle ill to position with the teeth-forrning shoulders l2 thereof disengaged from the teeth-forming shoulders 65 or" insert sleeve cc, then outer knob unit 0 is disconnected from the spindle and the spindle may be rotated independently of the outer knob unit.

The clutch sleeve it is displaced axially in either direction on spindle it between position clutching outer knob unit 0 to spindle ill and position ole-clutching the knob unit and spindle, by means of the push rod 58. I effect such operation of clutch sleeve Ed by providing a slot '53 transversely through spindle ill with this slot opening through the outer end of the spindle and being extended inwardly a distance therefrom inwardly through the spindle. A pin it is secured at its opposite ends in diametrically opposite bores formed through the clutch sleeve ill, with this pin extending across square passage ll of the sleeve and through the slot T3 in the spindle it. The push rod 56 extends completely through the spindle iii and projects at its outer end a distance outwardly beyond the spindle to a location Within the knob insert sleeve til. Th pin 76 i extended through a suitable bore formed in push rod 56, so that the clutch sleeve is is thereby secured tothe push rod. Thus, the clutch sleeve id will be displaced axially of spindle I by axial movements inwardly or outwardly of the push rod in the bore idea of the spindle. The mounting and positioning of clutch sleeve "ill and pin ill relative to each other and to push rod 56 and spindle ill, is such that with the push rod in retracted position with the button member id projected from inner knob unit I, the clutch sleeve it will be in position in clutched engagement with the insert sleeve on, but with push rod 58 projected into outer knob unit 0 by depression of button member the clutch sleeve will be moved outwardly on spindle it to position in the inner end of insert sleeve so with the clutch teeth-forming shoulders F2 thereof declutched and disengaged from the teeth-forming shoulders 68 of insert sleeve 63.

When the clutch sleeve 'ii] is moved outwardly in insert sleeve til on spindle id to position deolutched from the insert sleeve and knob unit 0, I provide a locking mechanism for locking the head outer knob unit 0 against rotation, which 11 mechanism functions automatically by the outward movement of the clutch sleev to declutched position. Referring to Figs. 12 and 1'7, diametrically opposite bores are formed through the inner end portion of insert sleeve 60 at locations such that the clutch sleeve ii! is always positioned in the insert sleeve between these bores. In each of these bores I locate a locking ball 15. The diameter of each of the balls 16 is greater than the thickness of th side wall of the insert sleeve member 60, while the diameter of each of the ball-receiving bores 15 is slightly greater than the diameter of the balls, so that the balls may freely move axially, inwardly and outwardly through the bores and radially relative to and through insert sleeve 60. Conical camming recesses ii are formed in the outer side of clutch sleeve id at diametrically opposite locations thereon. In the normal position of the door lock unit with the latch bolt B projected and the button member 59 and push rod 59 in normal projected positions, the camming recesses Tl ar opposite and axially aligned with the ball receiving bores Til of insert sleeve ti so that, the locking balls '76 may be received and seated in such recesses. This position of the balls 76 is clearly shown in Fig. 12. The diameter of each of the locking balls 16 is the same, and is such that when these balls are in positions seated in camming recesses ll, they have a loose bearing engagement at their outer sides with the inner surface 2 3a of the hub-forming sleeve 24 of lock plate 253. This inner surface 23a is concentric with the external surface of the clutch sleeve Ell, there being a clearance between these surfaces. Thus, in such position the inner end length of insert sleeve 60 which extends through locking plate 20, is freely rotatable in and relative to that plate and its hub-forming flange 24, for rotation of the outer knob unit in either direction to rotate the spindle It] to retract latch bolt B.

When the clutch sleeve is moved axially of spindle iii from its position with the locking balls it received in the camming recesses 71, the locking balls will be cammed or forced by the cammin recesses radially outwardly through the ball receiving bores in the insert sleeve 60. I utilize this action to eifect locking of the outer knob unit 0 to the lock plate 29 against rotation when the clutch sleeve H! is moved outwardly on spindle ill by depression of button member ii to thus declutch and disconnect the knob unit 0 from the spindle Hi. In the example embodiments here disclosed, I provide ball receiving, locking recesses 18 in the hub forming flange 24 of the locking plate 20. These recesses ii? are located at diametrically opposite positions in flange 24. The recesses are disposed longitudinally of the flange relative to the axis thereof and are open at their inner sides facing the clutch sleeve 18. For instance, such recesses may be formed by outwardly bent or pressed channel portions 18a on the flange.

In normal position of the door lock mechanism, the locking recesses 18 are located opposite and in position for receiving thereinto the locking balls is, respectively. Thus, when clutch sleeve E8 is moved outwardly on spindle Hi to position declutching or disconnecting outer knob unit 0 from the spindle, the balls 16 are cammed radially outwardly into the locking recesse I8 and are constrained against displacement radially inwardly therefrom by the outer surface of the clutch sleeve H1. The diameters of the looking balls 56 relative to the internal diameter of flange 24 and the external diameter of clutch sleeve [9 is such that with clutch sleeve displaced to position with the balls '56 cammed into the locking recesse 78, the balls will have rolling bearing engagement at their inner sides with the external surface of clutch sleeve 10. Upon movement of the clutch sleeve l0 inwardly on spindle it by the push rod 50 to the normal projected position of the push rod and button member 40, the outer knob unit 0 is again clutched to spindle l6 and the locking balls "l8 are lined up with camming recesses ll, so that outer knob unit 0 may then be rotated to rotate spindle i0.

In the example embodiment of Figs. 1 to 3, a spring catch means is provided for automatically engaging and releasably retaining the push rod 56 in its position outwardly projected by depression of button member 43. Such spring catch mean in this example, takes the form of a pair of spring arms which are suitably mounted and located in insert sleeve 60 of the outer knob unit 0 in positions spaced apart in generally paiallel relation and being extended rearwardly to the outer end of spindle Id and the adjacent free end of push rod to. The inner ends of arms 60 are bent inwardly toward each other to provide the converging, inclined spring fingers 8 I. These spring fingers are located at the opposite sides of the axis of push rod 5 with the outer end of the push rod adapted to be engaged therewith. The outer end of push rod 53 is formed flattened at opposite sides 82 thereof and the outer end of the rod is formed to provide an arrow-head 83 providing at opposite sides thereof the laterally outwardly projected shoulders 8311. In normal projected position of button member =58 with the push rod 55 in its retracted position clutching outer door knob unit 0 to spindle iii, the arrowhead 83 forming the outer end of the push rod is positioned between the converging spring fingers ill of arms 85.3 with the nclined opposite side edges of head 83 engaged with the adjacent inclined sides of the converging spring fingers 8i, as will be clear by reference to Fig. 3. When, however, button member 4|] is depressed and push rod 50 is projected outwardly to declutch the spindle Hi from outer knob unit 0 and, lock the latter unit against rotation, the arrow-head 83 is forced outwardly between spring fingers 8|, forcing these fingers apart until their ends snap into positions behind the arrow-head 83 engaged with the shoulders 83a. This position of push rod 59 and head 83 is shown in dotted lines in Fig. 3. When the arrow-head 83 of push rod 56 is thus engaged by the spring fingers 8|, the push rod is constrained and held in such position against retraction under the action of the biasing springs 45 and 55.

Push rod 59 is released automatically from position engaged by spring fingers ill, by either rotation of the inner knob unit I relative to the spring fingers, or by rotation of the spring fin gers relative to the push rod and its arrow-head 83. For example, when inner knob unit I is 1'0- tated, the spindle ii) and push rod 50 will be likewise rotated and such rotation will turn the arrow head 83 through approximately 99 to thereby turn the shoulders 83a thereof out of engagement with the ends or" the spring fingers BI such spring finger ends then engaging against the flat sides 82 of head 83. As soon as push rod 50 and its arrow-head 83 have assumed this position, the push rod is released and the

springs

45 and 55 function instantly to project button member 40 and retract the push rod to it position unlocking outer knob unit 0 and clutching that unit to the spindle it. In the same manner push rod 59 is released automatically from the spring fingers iii by rotation of arms Si? to position the fingers at the flat sides d2 of the push rod arrow-head The outer knob unit mounts therein a key operated cylinder lock. or the pin tumbler type for eifecting rotation of spindle Iii to retract the latch bolt when the outer knob unit been latched or dogged inst rotation by depression of the button member 13 in the inner lrnob unit I at the inside of the door. This cylinder lock embodies variou features or my present invention, both in its combination with and relatiom ship in the door lock unit or set and in its design and construction as a cylinder lock of the removable plug type. This cylinder loch the form thereof disclosed herein, as adapted to the example embodiment of door lock units of the invention, comprises rsically a cylinder body iili having a driver pin case llil extended longitudinally therlong outwardly from on side thereof, and a cylinder plug P which is rotatably mounted in the body ltd and which provided with the usual keyway or slot K opening through one side of the plug for receiving therein an operative Referring to Figs. 2 and 17, the cylinder body iilii is of tubular form providing a circular bore or opening 592 extending axially therethrough and opening through the opposite ends of the body. The cylinder body iiiii is provided with a series of spaced bores i852 there-through along the under side of an opening into driver case tail for reciprocal projection therethrough of the usual spring loaded driver pins its reciprocally mounted in the driver case. Diametrically opposite driver case iGl, the cylinder body Hill is provided with a rib formation iiiii extending longitudinelly therealong and projected outwardly therefrom to form at the inner side thereof a groove Edd opening at its opposite ends through the ends of the cylinder body and being provided with spaced bores it? therethrough actually aligned with the bores at the driver case side of the cylinder body. This groove 1% is open at the inner side thereof throughout its length into the bore Hi2 of the cylinder body. The cylinder body we is mounted in assembled position within the outer knob unit 0 by securing the inner end of the body to the outer end of the insert sleeve In example, insert sleeve Gi is formed with diametrically opposite recesses or slots therethrough (see 2) which receive therein the inner end portions of driver case tilt and rib respectively, of the cylinder body. The forward end portion of insert sleeve lid is formed with an internal diameter to snugly receive therein the rear, externally cylindrical end portion of the cylinder body liiii. The cyl inder body is thus rigidly held in assembled position in knob unit 0 with the body being disposed and enclosed within knob cap 62 and the forward open end of the body being located adjacent the inner side of and axially aligned with the opening 3.2g in the cap.

In accordance with a feature of the invention, the cylinder plug P is assembled with and is adapted to rotate an actuator sleeve lit, by which rotation of the cylinder plug by a key inserted therein will effect latch bolt retracting rotation of the spindle id. This actuator sleeve 1 i d the example embodiment, formed as a cylinc l, tubular member having longitudinal slot iii through one side thereof and being extended to and opening through opposite ends of the sleeve. The actuator sleeve iii? has an external diameter to be rotatably received and journaled in bore 582 of cylinder body Hid. In mounted position or the actuator sleeve lit in cylinder body Hit, the sleeve extends completely through bore N32 with its forward end at the forward or outer end of the cylinder body but with its inner end portion projected a distance inwardly into the insert sleeve beyond the inner end of the cylinder body Hill. At its inner and actuator sleeve H ii is provided with a pair of rearwardly extended teeth H2 positioned at op posite sides of slot ill in diametrically opposite locations on the sleeve. The spindle is is provided at the outer end thereof with a head lid which is suitably fixed thereto, and which is provided with an axial bore or opening I 5a through which the push rod 50 extends. For attachment to the spindle Hi, the head H t may be provided with the slots l Ma to receive therein the tongues li lb formed on the end of the spindle (see Fig. 17). This head i H! is provided with a pair of forwardly extended teeth H5 located at diametrically opposite positions on the head. The actuator sleeve iii} extends inwardly into insert sleeve till a distance to locate the teeth i 52 thereof in positions for engaging upon rotation of the sleeve, the forwardly extended teeth HE of spindle head H4, as will be clear by reference to Fig. 11 in connection with Figs. 2, 3 and 17. In normal position, the pairs of teeth H2 and H5 are approximately apart, so that upon rotation of the actuator sleeve Ill! through the required number of degrees, the teeth H2 thereof will engage the teeth N5 of spindle head EM, and upon further rotation of sleeve lit in the same direction the spindle iii will be rotated thereby.

The cylinder plug P is formed at the forward end thereof with a radially extended flange iiiii therearound for engagement against the forward end edge of the actuator sleeve Hi3, when the plug P is mounted in assembled position in the sleeve. The key slot K open through the forward flanged end of plug P in the usual manner familiar in this art. Along one side disposed longitudinally thereof from the end flange lid to the inner end of the plug P there is formed a rib portion i2! having a width to be slidably received in the longitudinal slot iii of the ao tuator sleeve H0. The outer face or surface mm of the rib portion HE is formed on a radius transversely thereof, such that surface i2ia with the plug mounted in the actuator sleeve llil, lies in the plane and forms a continuation of the cylindrical outer surface of the sleeve. A series of spaced bores 12% are formed in along the rib portion E21, which bores open at their outer ends through the outer surface of such rib portion and at their inner ends open into and along the key slot K. These bores iii: are so located and spaced as to be axially with the bores i525 which open through body tilt from the driver case 18!. Bores E22 are adapted to reciprocally mount therein the tumbler pins H23 in the generally conventional manner for this type of tumbler pin lock.

The opposite longitudinal sides rib 52E are adapted to engage the adjacent longitudinal side edges of the slot iii in the actuator sleeve l iii, to thereby form the operative connection between the plug and the sleeve for rotation of the latter by hey rotation of the plug. The cylinder plug P has a length greater than the length of the cylinder body we and in mounted, assembled position of the actuator sleeve HQ with the plug P therein, the plug extends a distance inwardly through the sleeve beyond the inner end of the cylinder body but terminating a distance spaced inwardly from the inner end of the sleeve. A fixed pin or log M25 is formed from, or as a separate member secured in and extends radially outwardly from the rib portion I21 of plug P in position to slidably engage against the inner end edge of the cylinder body Hit in the assembled position of the actuator sleeve H8 and plug P in the cylinder body. The outer end of insert sleeve is formed of enlarged internal diameter to provide an annular space i25a for receiving pin I25. In this manner the plug P is secured against outward displacement in or removal from the actuator sleeve, while being freely rotatable as a unit with that sleeve in the cylinder body Hill.

In the example hereof, the spring catch means comprised by the spring arm 88, is mounted on and is rotatable as a unit with the cylinder plug P. This is effected by providing a bore 85 through cylinder plug P between the inner end thereof and the inner end of the cylinder body lllfl, with the opposite sides of the plug being provided with longitudinally disposed grooves 85 extending across the opposite ends, respectively, of bore 85. Grooves 85 extend to and open through the inner end of the plug. Each of the spring arms 80 has the end thereof opposite the spring finger ill bent laterally to provide a mounting leg 81. The spring arms at are mounted on and secured to the plug '1? by seating the arms in the grooves 86 With the mounting legs 3? thereof being extended into the bore 85 and with the spring fingers 8| of the arms in positions projected rearwardly or inwardly from the plug. When the plug P is in mounted, assembled position in the actuator sleeve 122, the spring arms 86 are secured and maintained in proper assembled position against displacement so as to be rotatable with the plug as a unit for functioning in the manner hereinbefore described.

With the door lock unit or set of the preferred eznbodi nent of Figs. 1 to 3, in installed and mounted position on a door D, when button member do in the inner knob unit I is in projected position, the push rod is in retracted position with the clutch sleeve is engaged with the insert sleeve of the outer knob unit and with the arrow-head 83 of rod 55) in inactive position disengaged from the spring catch arms 88. Under such conditions the latch bolt retracting spindle is rotatable by either the inner knob unit I or the outer knob unit 0 for latch bolt retraction, so that the door D may be opened from either side by solely knob operation.

When it is desired to latch or dog the outer knob unit 0 against rotation, so that the door cannot be opened from the outside except by the use of a key to unlock the cylinder lock in the outer knob unit, the button member 4% is depressed in the inner knob unit I. This depression projects push rod 5-9 outwardly to move clutch sleeve 39 to position disconnecting or declutching outer knob unit 0 from spindle iii, and at the same time eifects displacement of the locking balls ll; into locking engagement in the lock plate 29 to thereby lock outer knob unit 0 against rotation. {he projection of push rod 5!! to such position engages the arrow-head 83 thereof in looking relation with spring arms 80, so that the push rod and button member 46 are releasably locked in such position with the outer knob unit 0 locked against rotation. With the outer knob unit 0 locked, then door opening, latch bolt retraction of the spindle It from the outside may only be effected by key operation of the cylinder lock in the outer knob unit. Insertion of the proper key in the key slot K of the lock cylinder plug P will set the tumbler pins I23 and driver pins I94 in the usual manner for rotation of plug P in the lock. Rotation of cylinder plug P rotates actuator sleeve Hi! so that the teeth I I2 thereof engage the teeth I [5 on spindle head I M with resulting rotation of the spindle and retraction of the latch bolt.

In this preferred exampled embodiment, when the button member 49 is depressed with the outer knob unit latched or dogged against rotation, the door D may be opened by latch bolt retracting rotation of the inner knob unit I. Rotation of the inner knob unit will rotate push rod 50 with spindle Hi and turn the arrow-head 83 into position released from spring arms 86, whereupon the push rod and button member it will snap back to normal position. Similarly, upon key operation of the cylinder plug P, the arrow-head 83 of push rod 50 will be released from the spring arms by rotation of those arms with the actuator sleeve l W and plug P, to push rod releasing position.

In the event that it is desired to lock the mechanism against automatic release and projection of push button member 40 and push rod 58 from depressed position upon rotation of spindle lil by either the inner knob unit or key operation of the cylinder plug P, it is only necessary after depressing button member M] to rotate that member to engage lug 46 over the shoulder 45a of the bayonet-forming slot 45 of button mounting sleeve 4 l When it is desired to restore the mechanism to automatic releasing functioning, the button member 43 may be turned to the normal position with the lug 46 lined up with the longitudinal slot 431) of sleeve 4 I.

In Fig. 4 of the drawings I have shown a modified form of the example embodiment of Figs. 1 to 3, in which the provision for releasably looking the push button member 49 and push rod 50 against automatic release from spring catch arms 8%, is eliminated. In this example, this has been efiected by eliminating from the button member mounting sleeve 4|, the bayonet slot 45 for engagement by lug 46 of tube 53 of the inner knob unit I. If desired, the longitudinal slot 431) together with the lug 46 may be retained for maintaining button member 40 and sleeve 4! against rotation as the button and sleeve are reciprocated between projected and depressed positions. In this form of the invention, therefor, the push rod 50 and button member 45] are always automatically released under all conditions from looking engagement by the catch arms fill in depressed position of the button member, whenever either the inner knob unit I is rotated to rotate the spindle ID or the catch arms 80 are rotated by key operated rotation of the cylinder plug P of the cylinder lock mounted in the outer knob unit 0.

In another modified form of the invention, as shown in Fig. 5, I have provided a form of push rod 50' which eliminates the arrow head 83 of the push rod 50. The push rod 50 has the inner end length 83' thereof formed of substantially constant external diameter therealong. In this modified form the springs 80 of the form of Figs. 1 through 3 may, if desired, be eliminated, as shown by Fig. 5. By utilizing such push rod 50',

the automatic, releasable locking of the push rod in its projected, actuating button-depressed position, is eliminated. However, the arrangement of bayonet slot 45 in the button mounting sleeve M with the lug QB in tube 53 of the inner knob unit I, or some equivalent arrangement, is included for releasably locking the button in depressed, push rod projected position, by manual turning of the button. In operation, when it is desired to lock or dog the outer knob unit in its locked position, declutched from spindle iii, the button member to is depressed and then rotated a quarter turn to locked position. After depression of button it, the outer knob unit 0 will remain looked under all conditions of opera-- tion of the spindle Ill by either inner knob or look rotation, until the button member lit is manually turned back to unlocked position for projection by the combined action of springs :35 and 55. Projection of button member 48 retracts push rod t and thereby unlocks outer knob unit 0 and again clutches that unit to spindle It for latch bolt retraction by rotation of the outer lznob unit. This modified form of Fig. 5 provides for functioning of the door lock unit in a manner which is referred to generally in the art as a vestibule action.

Except for the changes hereinabove described, the modified forms of Figs. 4 and 5 are in all other respects identical with the example embodiment of Figs. 1 to 3.

Removable cylinder plug An important feature of the invention resides in the design construction and arrangement of the cylinder lock unit and its cylinder plug P and actuator sleeve Ht, and in the combination of such unit and its components with certain of the components of the door lock unit or set, to permit of the efficient removal and replacements of the cylinder plug P.

In mounted and assembled position in the door lock units of the example embodiments, the cylinder plug P is constrained or restricted to a maximum range of rotation of approximately 140, that is, to a maximum range substantially less than 180, so that the cylinder plug cannot be rotated through a complete half turn of 180 to thereby align pin I with the inner end of the longitudinal slot it formed by the rib portion its of the cylinder body Iiiil. This limitation of the angular range through which cylin der plug P may be rotated, is due to the engagement of teeth H2 of actuator sleeve iIil with the teeth lid of head H5 on spindle iii, and to the connection of the spindle into the latch bolt unit L with the limited reciprocation provided thereby for the latch bolt B.

The cylinder plug P is, however, readily and efiiciently removable from the cylinder body Iilil and the outer knob unit 0, without the use of special keys or implements, special or otherwise, and in such a manner that neither the tumbler pins H3 in the plug, nor the driver pins I04 in the driver case I ll I, will be displaced inadvertently from'their receiving bores.

In order to remove the cylinder plug P from the cylinder body I06 and the outer door knob unit 0, the inside knob I is first removed by unscrewing it completely from spindle I0. The plate securing screws I2 are then unthreaded from lugs 23 on arms H of locking plate 20 to detach back plate iI and lock plate 29. The outside knob unit 0 is then drawn outwardly from the door D to remove therewith as a unit the spindle It, lock plate 2%! and the associated mechanism. The outside knob unit 0 with its attached mechanism is then held in an upside down position with the marker A which is provided on shank ti, as shown in Fig. 1, in visible position at the upper side of the shank. The locking plate 2b is then lined-up so that the ball receiving recesses I8 thereof will be in positions in a plane midway between the vertical and the horizontal, to permit the locking balls 16 to enter the recesses.

With the outer knob unit 0 held in the foregoing position, the push rod 59 is then depressed by pressing upon the outer, free end thereof, and while the push rod is thus depressed, the spindle I ii is twisted or rotated in either direction to thereby release the clutch sleeve Ill with resulting release of this sleeve for rotation. A key for the cylinder lock unit may then be inserted in normal position in the key slot K of plug P to set the tumbler pins I23 and driver pins Hi l to unlock and release the cylinder plug for rotation in the cylinder body Ito.

The key is then turned to rotate cylinder plug 1 P and its actuator sleeve III! through until plug pin lid is lined-up with the slot lot in cylinder body NW at the inner end of that slot. During such rotation it is or" importance to note that the actuator sleeve IIil is rotated to position the closed side wall thereof over and across the driver pin bores It?) which open into passage I02 of the cylinder body, so that the actuator sleeve Ht then functions as a guard or retainer to prevent displacement of these spring loaded pins. During the rotation of the cylinder plug P, the tumbler pins iZZ of the rib portion I2I of the plug which is received in slot III of actuator sleeve IIb, are closed against tumbler pin displacement by the side wall of body Iiiil. In order to prevent displacement of the tumbler pins I23 from their bores into the groove I65 of cylinder body we when the cylinder plug P is rotated through its half turn with rib portion I2! linedup with and along slot Itii, I have provided a removable wedge strip W within slot I96 to completel occupy that slot from end to end thereof with the inner surface defining bore M2 at opposite sides of the groove Hit. Thus, when the cylinder plug P has been rotated through the half-turn from normal position to position with pin I25lined up with groove Iilii, the tumbler pins I 23 are retained against displacement by the wedge strip W. From this position, the cylinder plug P may then be drawn outwardly with pin I25 sliding through groove Itfi, the wedge strip W being of course located on the upper side of the plug and being withdrawn therewith and being held by the fingers in position over the tumbler pin bores until the plug is completely removed.

In the present example, in order to insure against the inadvertent withdrawal of the sleeve H5 from the cylinder body when the cylinder plug P is withdrawn, 1 have provided the sleeve with a small projection lit-0i for arresting engagement with the rear or inner edge portion of the cylinder body which surrounds the bore therethrough. 'ihis projection il ia is shown in Figs. 2 and 17, and is located on the sleeve intermediate the inner end of the sleeve and the inner end of the cylinder body when the sleeve is in assembled, cylinder plug receiving position in the cylinder body. In such assembled position the 7 projection Iifia is located at the under side of 0 the sleeve spaced a distance inwardly from the it? inner or rear end of the cylinder body. When the cylinder plug P and sleeve 1 it are rotated to position with the pin I25 in line with groove E66, the sleeve projection is rotated to position to engage the inner edge portion of the cylinder body in the event that the sleeve should be withdrawn with the plug, so as to insure against complete withdrawal of the sleeve from the cylinder body. In the initial assembly of the lock unit the sleeve I it may be inserted into position from the outer end of the cylinder body through the bore I32 by aligning the projection l Ida with the body groove it, then after the projection is clear of the groove at the inner end of the body, rotating the sleeve to its proper assembled position with the slot Ill uppermost and the projection then in position to engage the cylinder body and prevent inadvertent withdrawal of the sleeve.

After cylinder plug P has been reloaded with the desired combination of tumbler pins, the reloaded plug may be readily replaced in the cylinder body Hit by placing a wedge strip W over the tumbler pin bores and inserting the plug and wedge into the cylinder body with the wedge and pin 525 sliding through and along groove H36 of the cylinder body. After the plug P is in fully inserted position it may be then rotated through 180 to its normal position of assembly with pin I25 engaged against the inner edge portion of the cylinder body 63. The key may then be removed and spindle H3 turned in the proper direction to engage the clutch sleeve 16 with the spindle. The spindle it may then be inserted through door opening 2 and through the latch bolt unit L in the usual manner of assembly. The fastening screws l2 may then be inserted to position and screwed up to clamp plates [I and 20 in pos'tion against the door, after which the inner knob unit I is screwed onto the inner end of the spindle to complete the reassembly and remounting of the lock unit on the door.

No claim is made herein to the cylinder lock unit per se as such unit and the arrangement and. construction thereof are claimed in my pending application Serial No. 259,565, filed December 3, 1951, as a division of this present application.

The design and construction of the cylinder lock unit comprsed by body I80, actuator sleeve H0, cylinder plug P, and wedge strip W, is shown in an adaptation thereof for the combination with the particular door lock units or sets of the e;:ample embodiments. However, it is to be understood that the various features of the removable plug of the invention are not restricted to the example adaptation, as such features are capable of other adaptations to cylinder locks generally, and the invention contemplates and includes such adaptations.

It will also be evident to those skilled in the art, that various changes, modifications, substituti ons, eliminations and additions may be resorted to without departing from the broad spirit and scope of my invention, and, hence, it is not my intention to limit the invention in all respects to the exact and specific disclosures of the example embodiments herein illustrated and described, except as may be required by clearly intended specific limitations thereto included in any of the appended claims.

What I claim is:

1. In a door lock, in combination; a latch bolt retracting spindle; an inner knob mounted on said spindle; an outer knob mounted on said spindle for rotation independently thereof; a clutch sleeve mounted on said spindle for move- 20 ment in either direction axially thereof; a clutch member on said outer knob for clutching engagement by said clutch sleeve in one position thereof and for disengagement therefrom in another position thereof; a push button member reciprocally mounted in said inner knob; said spindle being provided with an axial bore therethrough; a push rod reciprocally mounted in said spindle bore and being attached at its outer end to said push button member; and said push rod being operatively connected to said clutch sleeve for moving said sleeve under the control of said push button member to and from clutching engagement with said outer knob clutch member.

2. In a door lock unit, in combination; a latch bolt retracting spindle; an inner knob mounted on said spindle; an outer knob mounted on said spindle for rotation independently thereof; a clutch operable to positions to connect said outer knob with or disconnect said knob from said spindle; a manually operable member mounted in said inner knob and being operatively conected with said clutch for selectively operating the clutch to outer knob connecting or disconnecting positions; biasing means continuously biasing said manually operable member to position with said clutch in position connecting said outer knob with said spindle member; means adapted to hold said clutch in outer knob disconnecting position; and said last named means being operable automatically by rotation of said spindle member to release said clutch for biasing to its position connecting said outer knob with sa d spindle member.

3. In a door lock, in combination; a latch bolt retracting spindle; an inner knob mounted thereon; an outer knob mounted on said spindle for rotation independently thereof; a clutch sleeve slidably mounted on said spindle within sa'd outer knob; a clutch member on said outer knob adapted to be engaged and disengaged by said clutch sleeve to connect and disconnect said outer knob from said spindle; manually operable means on said inner knob operatively connected with said clutch sleeve; biasing means connected with said manually operable means and being adapted to continuously bias said member to position with said clutch sleeve engaged with said outer knob clutch member; catch means adapted to be automatically engaged by and to releasably hold said manually operable means in positon with said clutch sleeve in position disengaged from said outer knob clutch member; and said catch means being adapted to automatically release said manually operable means upon rotation in either direction of said latch bolt retracting spndlc.

4. In a door lock unit, in combination; a latch bolt retracting spindle; an inner knob mounted on said spindle; a fixed lock plate; an outer knob journaled in said look plate, said spindle being extended axially through said lock plate into said outer knob; a sleeve member mounted on said spindle within said outer knob for reciprocation on said spindle; locking members operable by reciprocation of said sleeve member between positions locking said outer knob to said lock plate against and releasing said knob for rotation; a push button reciprocally mounted in said inner knob; a push rod connecting said push button with said sleeve member; means adapted to continuously bias said push button to position with said sleeve member releasing said locking members from latching engagement with said lock plate; and means for releasably holding said push rod and sleeve member in position with saidlocking members in looking position to maintain said outer knob against rotation.

5. In a door lock unit, in combination; .a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle for rotation therewith; a fixed lock plate; an outer knob rotatably mounted in said lock plate, said spindle being extended through said lock plate and into said outer knob axially thereof; a sleeve member mounted on said spindle within said outer knob for reciprocation on said spindle; locking members mounted in said outer knob for movements radially to and from locking positions engaged with said lock plate; said sleeve member being adapted to engage said locking members to move said members in one position of said sleeve into locking engagement with said plate and in another position of said sleeve to release said, members from locking position; a push button reciprocally mounted in said inner knob; a push rod connecting said push button with said sleeve member; means adapted to continuously bias said push button to position with said sleeve member releasing said locking members from locking engagement with said lock plate; and means for releasably holdingsaid push rod and sleeve member in position with said looking members in locking engagement with said lock plate.

6. In a door lock .unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate; an outer knob rotatably mounted in said lock plate, said spindle being extended through said plate and into said outer knob axially thereof; a clutch sleeve reciprocally mounted on said spindle within said outer knob; a clutchmember mounted on said outer knob and being adapted to be engaged by said clutch sleeve in one position of said sleeve to connect said knob with said spindle and to be disengaged from said sleeve in another position of the sleeve; locking members mounted in said outer knob and being adapted to be moved radially to and from outer knob locking engagement with said lock plate by reciprocation of said clutch sleeve; said locking members being adapted to be moved to locking position by movement of said clutch sleeve from position engaged with said clutch member and to be released for displacement from locking position by movement of said clutch sleeve to position engaged with said clutch member; a push, button reciprocally mounted in said inner knob; a push rod connecting said push button with said clutch sleeve; means adapted to continuously bias said push button to position with said clutch sleeve engaged with said clutch member; and means forreleasably holding said push rod and clutch sleeve in position disengaged from said clutch member and with said locking members in looking engagement with said lock plate.

7. In a doorlock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle for rotation therewith; a fixed lock plate; an outer knob rotatably mounted in said lock plate, said spindle being extended through said lock plate into said outer knob axially thereof and being rotatable independently of said outer knob; a clutch sleeve reciprocally mounted on said spindle within said outer knob;

a clutch member mounted in said outer knob adapted to be engaged by said clutch sleeve to connect said knob to said spindle in one position of the sleeve and adapted to be disengaged from said clutch sleeve to disconnect said knob from said spindle in, another position of the sleeve; locking members mounted in said outer knob for movements to and from locking positions engaged with said lock plate to latch and unlatch said outer knob from said spindle; said locking members being engageable with said clutch sleeve and being adapted to be moved to locking positions by movement of said sleeve to position disengaged from said clutch member and to positions released from said lock plate by said clutch sleeve when in position engaged with said clutch member; and manually operable means mounted on said inner knob and being operatively coupled with said clutch sleeve for selectively operating said sleeve.

8. In a door lock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate having a hub portion, said hub portion and plate having an axial bore therethrough, and said hub portion being provided with spaced recesses therein opening into said bore; an outer knob having a hubforming sleeve rotatably mounted in and extended through said lock plate hub portion; saidispindle being extended through the bore of said lock plate and hub portion and axially into said hubforming sleeve of the outer knob and being rotatable independently of said knob sleeve and said lock plate; a sleeve member reciprocally mounted on said spindle within said outer knob sleeve; said knob sleeve being provided with radially disposed bores therethrough; locking ball members mounted in said sleeve bores for movements therein; said sleeve member being formed to force said ball members outwardly through said knob sleeve bores to locking engagement in said lock plate hub recesses, respectively, when in one position on said spindle and being formed to release said ball members for movements inwardly through said sleeve bores to positions disengaged from said lock plate hub recesses when in another position on said spindle; and clutch means adapted to be actuated by reciprocation of said sleeve member to connect and disconnect said outer knob and spindle.

9. In the combination as defined in claim 8, manually operable means mounted on said inner knob and being operatively connected with said sleeve member for reciprocating said member on said spindle.

10. In the combination as defined in claim 8, said spindle being provided with an axial bore therethrough, a push rod reciprocally mounted in said bore and being connected at one end thereof to said sleeve member, the opposite end of said push rod being extended into said inner knob, and a push button reciprocally mounted in said inner knob and being connected with the adjacent end of said push rod.

11. In a door lock unit, in combination; a rotary spindle; an inner knob mounted on said spindle; a fixed lock plate having a bore therethrough and being provided with recesses therein at opposite sides of and opening into said bore; an outer knob having an insert sleeve rotatably mounted in said lock plate in position extended through the bore of said plate, said spindle being extended axially into said insert sleeve of the outer knob and being rotatable independently of said sleeve; a clutch sleeve reciprocally mounted on said spindle within said knob insert sleeve and being adapted to be moved inwardly into clutching engagement with said insert sleeve to connect said outer knob to said spindle and being movable outwardly on said spindle to position aeeaesr engaged from said outer knob insert sleeve; said clutch sleeeve being also formed for"receiving said ball members in positions moved inwardly through said bores out of engagement with said lock plate recesses when said clutch sleeve is moved outwardly to position engaged with said insert sleeve; and manually operablenieans connected'with said fclutch sleeve for selectively moving said sleeve between positions engaged with and disengaged from said outerknob insert sleeve.

"12: In a door lock unit, in combination; a latch bolt'retracting, rotary spindle; an inner knob mounted on said spindle: an outer knob mounted for rotation; said spindle being extended axially into said outer knob and being adapted to be rotated independently thereof; a clutch operable to position engaging said outer knob with said spindle and to positiondisengagingsaid spindle fromsaid'outer knob; 'means operatively associatedwith said clutch andbeing adapted to be actuated thereby to lock said outer knob against rotation when'said clutch is in position disengaging said knob' from said spindle and to unlock-and release said knob when said clutch is in position connecting said knob with the spindle; a manually operable push button mounted in said inner knob; a push rod extended from said push button to and being. operatively connected with said clutch for selective operation of the latter by said push button; a cylinder lock unit mounted in said outer knob and including a key operable cylinder plug therein; and an actuating member adapted to operatively connect said cylinder plug with said spindle for rotation of the latter by key rotation of said cylinder plug when said outer knob is locked against rotation by said clutch operated locking means.

13. In a door lock unit in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate; an outer knob rotatably mounted in said lock plate; said spindle being extended axially into said outer knob; a clutch member mounted on said spindle within said outer knob for reciprocation on the spindle between a position engaged with said knob to connect the knob to the spindle and a position disconnected from said knob to free said spindle for rotation independently of the knob; locking means connected with said spindle mounted clutch member for actuation thereby to lock said outer knob to said lock plate when said clutch member is disconnected from the knob and to release said knob from said lock plate when said clutch member is engaged with the knob; a lock unit mounted in said outer knob and including a key rotatable cylinder plug therein; and actuating means connected with said cylinder plug and being adapted to engage said spindle for rotating the spindle upon key rotation of said cylinder plug.

14. In a door lock unit, in combination; a latch boltwetracting,rotary spindle; an inner knob mounted onsaid spindle; a fixed'lock plate having a bore therethrough of greater diameter than said spindle, said spindle being extended axially through said lock plate; an outer knob includ-' ing'an insert sleeve disposed axially thereof and being rotatably mounted in and extended through said latch plate bore between and concentric with said'spindle and said plate; a clutch sleeve reciprocally mounted on said spindle within said outer knob insert sleeve; said insert sleeve being provided with a clutch member adapted to be engaged by' said sleeve in one position thereof to connect said knob to said spindle and to be dis-' engaged by said'clutch sleeve in another position thereof to'disconnect said knob insert sleeve and said spindle; locking means operatively connected with said clutch sleeve for locking said insert sleeve to and unlocking the same from said lock plate, said locking means being adapted to be actuated by said clutch sleeve to lock said outer knob to said lock plate when said clutch sleeve is disconnected from said knob insert sleeve andito unlock said knob from said lock plate when said clutch sleeve is engaged with said insert sleeve clutch member; manually operable means mounted in said inner knob and being operatively connected with said clutch sleeve for selectively reciprocating said sleeve; a lock unit mounted in said outer knob and including 'a'key operable cylinder plug rotatably mounted there'- in; and actuating means connected with said cylinder plug and being adapted to engage said spindle to rotate the latter'upon'key rotation of said plug.

15. In a door lock unit, in'combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate having a'bore therethrough; an outer knob rotatably mounted in the bore of said lock plate; said spindle being extended into said outer knob axially thereof; a lock unit mounted in said outer knob and including a key operable cylinder plug rotatably mounted therein; actuating means connected with said cylinder plug and being adapted to engage and rotate said spindle upon key rotation of said cylinder plug; clutch means on said spindle within said outerknob adapted for selective operation to engage said knoband connect the knob to said spindle or to disengage said knob to disconnect the knob from the spindle; 'a push button reciprocally mounted in said inner knob; a push rod reciprocally mounted inand extending axially through said spindle; said push rod being connected at one end thereof to said'clutch means for actuating said means by reciprocation of said rod and being connected at the opposite end to said push button for reciprocation by said button; a spring catch mounted within said outer knob between the inner end of said spindle and said lock unit and being adapted to be releasably engaged by the inner end of said push rod upon reciprocation of that rod inwardly by said push button; and said spring catch being adapted to be actuated to release said push rod upon rotation of said spindle; and biasing means adapted to continuously bias said push button and said push rod in a direction to withdraw said push rod from said spring catch.

16. In a door lock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate; an outer knob rotatably mounted in said lock plate; said spindle being extended axially into said outer knob and being adapted for rotation inde- 25 pendently thereof; a clutch member mounted on said spindle within said outer knob for movements between a position engaged with said knob to connect the knob to the spindle and a position disconnected with said knob to free said spindle for rotation independently of the knob; means for locking said outer knob against rotation when said clutch member is in position disengaged with said knob and for unlocking said outer knob when said clutch member is engaged with the knob; a cylinder lock unit mounted in said outer knob and including a key rotatable cylinder plug therein; tooth members on the inner end of said spindle within said outer knob; an actuator sleeve connected with said cylinder plug and being extended rearwardly therefrom into said outer knob; and said actuator sleeve being provided at its inner end with tooth members adapted upon key rotation of said cylinder plug to engage said spindle tooth members to thereby rotate said spindle.

17. In a door lock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; a fixed lock plate; an

outer knob rotatably mounted in said lock plate;

said spindle being extended axially into said outer knob; a clutch member movably mounted on said spindle within said outer knob and being adapted in one position thereof to engage said knob to connect the knob with said spindle and in another position thereof to disengage said knob to disconnect the knob from the spindle for rotation of the spindle independently of the knob; locking means connected with said spindle mounted clutch member for actuation thereby to lock said outer knob to said lock plate when said clutch member is in position disengaged from said knob and to unlock said knob from said lock plate when said clutch member is engaged with the knob; a manually operable member mounted in said inner knob; mechanism connecting said manually operable member with said spindle mounted clutch member for selective movement of the latter to either of its aforesaid positions; a cylinder lock unit mounted in said outer knob and including a key rotatable cylinder plug therein; spaced tooth' members mounted on the inner end of said spindle within said outer knob; an actuator member connected with and rotatable by said cylinder plug and being extended inwardly therefrom-into said outer knob; and spaced tooth members on said actuator member adapted upon rotation of said latter member by said cylinder plug to engage said spindle tooth members for rotation of said spindle.

18. In a door lock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle; an outer knob rotatably mounted independently of said spindle and said spindle being extended axially thereinto for rotation independently of said knob; a clutch member movably mounted on said spindle within said outer knob and being adapted in one position thereof to engage and connect said outer knob with said spindle and in another position to be disengaged from said spindle to release said spindle for independent rotation; a push rod reciprocally mounted in and extending through said spindle with one end thereof being extended into said inner knob and the other end thereof being extended beyond the adjacent end of said spindle into said outer knob; said clutch member being connected with said push rod and being adapted to be moved thereby to and from positions engaged and disengaged with said outer knob; a push button reciprocally mounted in said inner knob and being connected with the adjacent end of said push rod for reciprocating said rod; a cylinder lock unit mounted in said outer knob and including a key rotatable cylinder plug therein; tooth members mounted on the end of said spindle within said outer knob; an actuator sleeve connected with said cylinder plug and being extended inwardly therefrom in axial alignment with said spindle; said actuator sleeve being provided at its inner end with tooth members adapted to engage said spindle tooth members when said actuator sleeve is rotated by key rotation of said cylinder plug.

19. In the combination as defined in claim 18; a spring catch mounted in said actuator sleeve and being adapted to releasably engage the inner end of said push rod when said rod is actuated to move said clutch member to position disengaged from said outer knob.

20. In the combination as defined in claim 18; biasing means adapted to continuously bias the push button and push rod into position with said clutch member engaged with said outer knob; and a spring catch mounted in said outer knob and being adapted to engage and releasably hold the adjacent end of said push rod when said rod is in position with said clutch sleeve disengaged from said outer knob.

21. In the combination as defined in claim 18; a spring catch mounted in and rotatable with said actuator sleeve and being adapted to releasably engage and hold said push rod when the latter is in position with said clutch member disengaged from said outer knob and when said cylinder plug is in normal locking position; and said spring catch and push rod end being constructed and arranged for automatic release of said push rod upon relative rotation between said push rod and spring catch.

22. In a door lock, in combination; a spindle having external threading and an axial bore therethrough; a knob unit threaded on to said spindle; a push rod reciprocally mounted in said spindle bore and being extended into said knob unit; a push button unit reciprocally mounted in said knob unit in axial alignment with said push rod; said push rod being provided with external threading thereon having the same lead as the external threading of said spindle; and said push button unit being threaded onto said push rod to connect said push rod to said button unit.

23. In a door lock unit, in combination; a rotary spindle provided with external threading thereon and having an axial bore therethrough; a hollow knob unit threaded onto said spindle; a push rod reciprocally mounted in said spindle bore and being extended into said knob unit, said push rod being formed with an enlarged diameter head within said knob unit having external threading thereon of the same lead as the lead of the external threading on said spindle; a push button unit threaded on said externally threaded head; and a biasing spring mounted on said push rod between said enlarged diameter head and the adjacent end of said spindle within said knob unit.

24. In a door lock unit, in combination, a rotary spindle provided with external threading and having an axial bore therethrough; a hollow knob unit having a hub insert provided with an internally threaded bore therethrough threaded onto said spindle; a push rod reciprocally mounted in said spindle bore and being extended into said knob unit, the end of said push rod within said knob unit being provided with an enlarged diameterhead having externalthreading of the same lead as the lead of the external threading of. said spindle; the external diameter of thethreading of said head being less than the internal diameter of the threading in said knob insert bore; said knob unit having a bore therethrough in the outer side thereof in axial alignment with said push rod; a tube member mounted on said hub insert and being extended therefrom in position surrounding said spindle; a 'push button unit reciprocally mounted in said tube member and being extended through said knob unit bore; and said push button unit being threaded onto said externally threaded head of said push rod.

25.. In combination, in a door latch unit; a rotary spindle; a fixed lock plate having a bore therethrough; a knob having an insert sleeve rotatably mounted in said lock plate bore; said spindle being extended axially into said insert sleeveof said knob for rotation independently thereof; a camming sleeve member mountedon the exterior of, said spindle for rotation therewith and being also mounted for reciprocation on said spindle within said knob insert sleeve independently of the spindle; said insert sleeve being formed with bores disposed radially through cpposite sides thereof at opposite sides of said camming sleeve member; ballmembers'moun'ted in said insert sleeve bores; said lock plate being formed with recesses therein opening into said lock plate bore at opposite sides of said knob insert sleeve for alignment with said insert sleeve bores; said camming sleeve member in One position thereof on said spindle being adapted to'c'am said ball members outwardly into locking engagement in said insert sleeve bores and said lock plate recesses to lock said knob against rotation and in another position thereof being adapted to release said balls for inward movement to positions disengaged from said lock'plate recesses to release said knob for rotation; and said camming member in the position thereof releasing said ball members to release said knob for rotation being adapted to engage and connect said insert sleeve with said spindle for rotation of said spindle by said knob.

V 26. In the combination as defined in claim 25, manually operable means for reciprocating said camming sleeve member selectively to either a position cainniing or a position releasing said ball members.

27. In the combination as defined in claim'25, manually operable means for selectively reciprocating said camming sleeve member; biasing means adapted to continuously bias said camming'sleeve member to position releasing'said ball members from looking engagement with said lock plate; and means for releasably holding said camming sleeve member in the position thereof oamming said ball members into locking engagement with said lock plate.

28. In combination, in'a door latch unit; a rotary spindle; a fixed look plate having a bore therethrough; a knob having an insert sleeve journalled in said lock plate bore; said spindle being extended axially into said insert sleeve of said knob forrotation indep t y. t reof; camming sleeve member reciprocally mounted on said spindle for reciprocation thereon within said knob insert sleeve; said insert sleeve being formed with bores disposed radially through opposite sides thereof at the oppositesidesof said camming sleeve member; ball members mounted in said insert sleeve bores; said lock plate. being formed with recesses therein opening into said lock plate bore at opposite sides of said knob insert sleeve for alignment with said insert sleeve bores; said camming sleeve member in one positionthereof on said spindle being adapted to cam said balls outwardly into locking engagement in said insert sleeve bores and said lock plate recesses and in anotherposition thereof being adapted to, release said ball members for inward movements to' positions disengaged from said lock plate recesses to release said knob for rotation; and said camming sleeve member being also formed to engage said knob insert sleeve to. connect said sleeve to said spindle when said camming sleeve member is in position releasing said ball members from looking engagement in said lock plate recesses.

29. In a door lock unit, in combination; a latch bolt retracting, rotary spindle; an inner knob mounted on said spindle for rotating the spindle; an outer knob rotatably mounted independently of but receiving therein the said spindle; a clutch sleeve reciprocally mounted on said spindle; a fixed locking member; movable locking means connected with said clutch sleeve and being operable to position engaged with said fixed locking member to lock said outer knob against rotation in one position of said clutch sleeve and being operable to position disengaged from said fixed locking member to release said outer knob for rotation in another position of said clutch sleeve; said clutch sleeve and said outer knob each being formed with fixed members thereon adapted to be interengaged to lock said outer knob with said spindle when said clutch sleeve is in position with the outer knob released by said movable locking means and to be disengaged when said clutch sleeve is in position with the outer knob locked by said movable locking means; and manually operable means connected with said clutch sleeve for selectively reciprocating said sleeve between position engaged with and position disengaged from said outer knob.

GO'I'IHARD HAGSTROM.