US3097872A - Hold back retractor - Google Patents

Description

INVHVTOR.

3 Sheets-Sheet l F. J. RUSSELL HOLD BAcKRErrRAcToR FRED vl RUSSELL ATTORNEYS nu L um md omJ .J su .g 0W? \Nm mi OQ. N.-

July 16, 1963 "Filed April 21. 1961' 5| b Illa 1431. mm mm n mm Q n 3.3 m. un m July 16, 1963 F. J. RUSSELL 3,097,872

HOLD BACK RETRACTOR Filed April 21, 1961 3 Sheets-Sheet 2 ['QED J R Ussel- 1- IN VEN TOR.

ATTORN EY 5 July 16, 1963 F. J. RUSSELL HOLD BACK RETRACTQR Filed .4px-11,21. 1961 3 Sheets-Sheet 3 INI/EN TOR.

FRED 1. RUSSELL ed): s

ATTORNEYS United States Patent O 3,097,872 HOLD BACK RETRACTOR Fred J. Russell, 3800 Don Felipe Drive, Los Angeles, Calif. Filed Apr. 21, 1961, Ser. No. 104,657 Claims. (Cl. 292 169) The invention relates to door locks and in particular locks wherein spindles rotate whereby to manipulate a retractor slide which in turn operates a latch bolt. The invention has special reference to a locking mechanism subject to operation by a key or turn button to hold the retractor and hence the latch bolt in retracted position.

When la key is turned in a lock or a button is turned or pressed, as in the case of a privacy lock, some mechanism within the lock must be set in operation to lock against manipulation -by the knob on the other side which is ordinarily employed to open the door. The more common expedients resorted to in locks of this kind has been to interpose some blocking 'device between a stationary part of the lock mechanism and the spindle so that the spindle cannot be rotated. Consequently, when the spindle is incapable of rotation, there is no agency capable of withdrawing the latch bolt; and hence the door is locked. When this expedient is resorted to, the mechanical elements compacted into a device of this kind often become undependable. If the llock is one intended to be locked airomv either side in order to, say, block rotation of both spindles, each spindle in turn must be `provided with some blocking means to anchor it to a :stationary portion of the device and preferably also something to carry over motion from the key-actuated lock or button on one side or the other. These circumstances apply also in a modified version of the lock where it is desirable to hold the latch bolt back in unlatched position so that the door can be opened repeatedly without need for turning the knob. The .application herein disclosed is a continuation-impart of the -co-pending application Serial No. 98,067, tiled March 24, 1961.

It is, therefore, among the objects of the invention to provide a new and improved locking device wherein the mechanism is capable of arresting or blocking movement of the slide after it has been moved to withdrawn position whereby the latch bolt remains unlatched.

Another object of the invention is to provide a new and improved door lock wherein simple expedients are resorted to whereby to transfer motion from a key or button mechanism through the lock by the shortest route, thereby to quickly and positively secure the 4retracto slide Ifor the latch bolt lin withdrawn position.

Still another object of the invention is to provide a new and improved locking mechanism for the retractor slide of :a lock which can be operated by a key or locking button on either side but wherein the mechanism is simpliiied `in order to reduce the number and complexity of parts as well =as to improve the strength and dependability Iof the means for holding the'retractor slide in withdrawn position.

Still another object of the invention is to provide a new and improved simple, direct blocking mechanism for holding operating parts of the kdoor lock in position wherein the retractor slide remains withdrawn, the mechanism being such as not to be hampered in its operation 6 'by any variation in the arresting pfo=s1t1ons of the knobs.

With these and other objects in view, the invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated 4are attained, `as hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a longitudinal sectional view of the assembled device in position holding the retractor slide at .a withdrawn location by operation of a blocker.

FIGURE 2 .is a longitudinal sectional view of the device similar to FIGURE 1 wherein the retractor slide has been released.

FIGURE 3 is a :cross-sectional view taken through center line of cam slots on the line 3 3 of FIGURE l.

FIGURE 4 is a cross-sectional view of the device taken through center line of cam slots on the line 4 4 of FIGURE 2.

FIGURE 5 is a cross-sectional view of the device taken on the line 5 5 of FIGURE 2.

FIGURE 6 is Aa cross-sectional view similar to FIG- URE 5 taken on the line 6 6 of FIGURE 1 showing the retractor slide in retracted position.

FIGURE 7 is a cross-sectional View taken on the line 7 7 of FIGURE 1.

FIGURE 8 is a fragmentary transverse view taken on the line 8 8 of FIGURE 5.

FIGURE 9 is a fragment-ary transverse View taken on the line `9 9 of FIGURE 6.

FIGURE l0 is a fragmentary cross-sectional view taken on the line 1010 of FIGURE 9.

FIGURE 1l is a longitudinal sectional View of the assembled device in locked position as taken on the line 11 11 of FIGURE 1.

In an embodiment of the invention chosen for the purpose of illustration there is shown the necessary parts of a door lock mounted in an opening 10 in a door 11. T-he parts consist in part of a two- piece frame 12, 12 enclosed in a housing 13, the frame having mounted thereon an outside spindle bearing 14 and an inside spindle bearing 1S. A transversely reciprocating retractor slide 16 is manipulated alternatively by an outside tubular spindle 17 or an inside tubular spindle 18. The special mechanism featured in the invention herein d-isclosed -consists in the main of what can be :generally described as a blocker assembly capable of moving a blocker 19, shown in cross-section in FIGURES 1 and 2, from the position shown in FIGURE 2 to the position shown in FIGURE 1 where it engages the retractor slide 16, and holds it in withdrawn position.

To more clearly understand the operation of the device, attention is directed to the structure Aand relationship of the retractor slide 16 to which is attached a tailpiece 20 of a latch bolt (not shown) so that when the slide is moved in a direction from right to left, as viewed in lFIGURES 5 and 6, the latch bolt (not shown) will be withdrawn and the door will be unlatched.

When the retractor slide is unlocked and free to be moved, roll-backs 21 on the outside tubular spindle 17 or roll-backs 22 on the inside tubular spindle 18 are capable of being moved against retractor shoulders 23I Y or 24, suggested by broken lines in FIGURES 5 and 6, depending on the direction of rotation, thereby to A spring keep-er 25 of the housing 13 engages one end of Ia spring means 26, the other end of `which is impressed against the retractor slide in la customary manner in order normally to urige the slide in a direction from left to right, as viewed in FIGURES 5 and 6.

A cam :sleeve 40 is rotatably secured within the spindle 17 between a knob retainer 217 and la washer 49, the tabs 50 and 51 of which extend into openings 52 land 53, respectively, in the tubular spindle 17. The cam sleeve 40 includes a dovetail `washer 41 which is joined wifh and a part of the cam sleeve 40u The dovetail washer has a non-circular opening 141 therein as shown in FIG- URE 7. This opening includes the shoulders y60, 61, 62, and 63. O11 opposite sides of cam sleeve 40 are two cam. slots 42 and 43 which extend in a somewhat oblique circumferential direction, as is apparent in FIGURES 1, 2, 3, and 4.

' Within the inside diameter of the ca-m sleeve 40 is located a blocker sleeve 46. The blocker 19v is secured to the end of blocker sleeve 46 by means of an annular extension 55 on the blocker sleeve and snap ring 56.

On opposite sides of spindle 17 are located two spindle slots y117 and 118, :as seen in FIGURE 11. These slots extend axially along a certain length of spindle 17. Pins 44 and 45t, are located in and are a part of blocker sleeve 46 tand extend outwardly from said blocker sleeve through cam slots 43 :and 42 respectively and also through spindle slots 117 and 11S` respectively. Thus, when cam. sleeve 40 is rotated in one direction, the action of the cam slots 43 and 42 on pins 44 and 45 make the blocker sleeve 46 and blocker 19 move axially within spindle 17 from left as shown in FIGURE 2 to right las shown in FIGURE l. The spindle slots 117 and 118 limit the movement of the pins y44 and 45 and therefore the movement of the blocker sleeve 46 to ran axial direction within the spindle 17. When cam sleeve 40 is rotated in the opposite direction, `the blocker -sleeve 46 and blocker 19 move axially within spindle I17 from right as shown in FIGURE 1 to left as shown in -FIGURE 2.

To hold a hooked end 57 of the blocker in correct position, there is provided a slot 58 in the outside sleeve bearing 14. The slot extends withi-n the right-hand end of the sleeve bearing, as viewed in FIGURES 1 and 2, into the fname 12 so that the hooked end 57 when properly openated can be [passed into a chamber 59 wi-thin the interior of the iframe 12, 12 Ito the position shown in FIGURE 1. An lopening 54 in outside tubular spindle 17 extends circumferentially about 106 so that the outside tubular `spindle 17 can be rotated yfreely without interference from the blocker 19 in order to manipulate the retnactor :slide 16 1in the nonmal manner when it is not blocked by blocker 19 (shown in FIGURE 2).

Nonrotatably conned in a conventional manner Within the outside tubular spindle is an outside key-operated mechanism 27 Iwhich is joined rotationally with a tailpiece 31. The .tailpiece 31 extends into the non-circular opening 141 (see FIGURE 7) of the dovetail washer 41. When rotated in one direction by operation of the outside key-operated mechanism 27, the tailpiece 31 engages the shoulders 60 and 63 of the dovetail washer 41, thus rotating cam sleeve 40 in one direction. When rotated in the other direction, the tailpiece 31 engages the shoulders 61 and 62 of .the dovetail washer 41, thus rotating cam sleeve `40 in the opposite direction. Though not shown in detail, the same relationship exists between a tailpiece 36 -of an inside lkey-operated mechanism 28 housed in the inside tubular spindle 18 and an extension sleeve 33.

In order to rotationally connect the inside key-openated mechanism 28, its tailpiece 36 and the extension sleeve 33 (all located in the inside tubular spindle 18) with the cam sleeve 40 (located in the outside tubular spindle 17), a shaft 29 is nonrotatably joined at one of its ends to the extension sleeve 33t, its other end comprising two shoulders 129 and 229 (see FIGURE 7) which extend through the non-circular opening 141 of the dovetail 4 washer 41. Shaft 29 also includes a shoulder 48 which at all times is urged against the dovetail washer 41 by a coiled spring 47, one end of which bears against shoulder 48 and the other end of which bears against blocker sleeve 46, thus holding shoulders `129 and 229 of shaft 29 within non-circular opening 1141 of dovetail washer 41 at all times. The left-hand :end of shaft 29 (as shown in FIG- URE l) includes a recess 30 which clears the tailpiece 31. When shaft 29` is rotated by the inside key-operated mechanism 28, the shoulders 129 and 229 (see FIGURE 7) engage shoulders 60, 63 or shoulders 61, 62, respectively, of dovetail washer and thus rotate cam sleeve 40.

In operation, let it be assumed that the parts are in latch bolt released position, as shown in FIGURE 2, which would ialso prevail with respect to the parts as shown in FIGURES 4, 5, and 8. The blocker 19 and its hooked end 57 is withdrawn and the retractor slide 16 is `free to reciprocate when acted upon by one or another of the roll-backs 2'1 or 22. Obviously the roll-backs are operated by actuation of the tubular spindles in the customary fashion which is the movement depended upon for withdrawing the latch b'olt (not shown) through the agency of the tailpiece 20. In this position the cam slot 43 visible in FIGURES 3 and 4 is rotated to a position such that the pin 45 is at `the outer end yas shown in FIG- URE 2. When the outside key-operated mechanism 27 is then manipulated, the tailpiece 31 is rotated in a counterclockwise direction (see FIGURE 7), wh-ich in turn rotates the cam sleeve 40. This motion forces the pins 45 and 44 down the cam slots 42, 43` and since the pins can only move axially, being channeled in outside tubular spindle slots 117, 118, the pins in consequence will shift axially from left to right, 4as viewed in FIGURES 1 and 2, until they reach the other ends of the cam slots, as shown in FIGURE 1. Before the foregoing adjustment is rnade, however, one spindle or the Iother is rotated in the customary fashion to withdraw the retractor slide to the position of FIGURES 1 and 6. This may, for example, be done by lrotating the spindle 17 counter-clockwise las viewed in FIGURE 6 so that `the upper roll-back 22 moves against the upper retractor shoulder 23.

As the pins y44 and 45 are shifted axially, so also is the blocker sleeve 46 shifted axially from left, as shown in FIGURE 2, to right, `as shown in FIGURE 1. The hooked end 57 slides freely in the slot 5S until it enters the chamber 59. Since the retractor slide 16 is in withdrawn position, an aperture 67 therein will assume a position of alignment with the hooked end S7. The hooked end will therefore enter the aperture 67, as shown in FIGURES 1, 9, tand 10, the rear edge of which serves as a shoulder bearing against the hooked `end 57 under pressure of the spring 26. When in this position the retnactor slide `16 cannot move from left to right as viewed in FIGURE 6 even though the spindles 17 and 18 are released. Accordingly, the latch bolt will remain in withdrawn position and the do'or on which it may be mounted may be opened at will without need for rotating either of the spindles.

When the dev-ice thereafter is to be released, the tailpiece 31 of the outside key-operated mechanism 27 is rotated in la contrary or clockwise direction (see FIG- URE 7). This causes the cam sleeve 40 to be rotated in a corresponding direction and movement will force the pins 44 .and 45 along the respective slots 43 and 42 to the opposite ends which will cause the pins and the attached blocker sleeve 46 to be moved in a direction from right to left, as viewed in FIGURES 1 and 2. This movement is accompanied by a corresponding movement of the blocker 19 and the hooked end 57 from the position of FIGURE 1 lef-tward to the position Aof FIGURE 2, within the slot 58. Thereafter the retractor slide is again free lfor manipulation in the customary fashion by operation of the tubular spindles.

It is possible also to use the device in the form herein described as a lock for locking the latch bolt in exextended position shown in FIGUREZ, and the spindles this the retractor slide is permitted to remain Vin the extended position shown in FIGURE 2, and the spindles remain in normal position as suggested in connection with FIGURE 5. The cam sleeve is then rotated as previously described, for example, by manipulation of the key-operated mechanism and the tailpiece lil.V When the cam is rotated counter-clockwise, as viewed in FIG- URE 3, the pins 45, 44 will be shifted from the outer ends of the respective cam slots (see FIGURE 2) to the inner ends of the respective cam slots (see FIGURE l). This will force the blocker `19 and the hooked end 57 to move toward the right as viewed in FIGURE l until the hooked end falls behind the adjacent rear edge of the retractor slide 16. Presence of the hooked end 57 behind the slide effectively blocks the slide from movement from a latch lbolt extended position and hence the latch bolt (not shown) will remain locked, but subject to unlocking by reverse operation of the cam and the blocker.

The operations of blocking the slide in hold-back position as Well as locking and unlocking, as accomplished by manipulation of the outside key-operated mechanism 27 and its tailpiece 31, may alternately be accomplished by manipul-ation of the inside key-operated mechanism 28 land its shaft 29. In effect, the mechanism 28 substitutes for the mechanism 27, and the shaft 2.9 substitutes for the tailpiece 31.

While the invention has herein been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and Iall equivalent devices.

Having described the invention, what is claimed as new in support of Letters Patent is:

l. A door lock for withdrawing a -latch bolt, said lock comprising a relatively stationary frame having a bearing member on at least one side thereof, a tubular spindle rotatably mounted on the bearing member and having roll-back means thereon, a latch retractor slide member reciprocatably mounted in said frame for movement in transverse direction and means on the slide engageable with said roll-back means for operation thereby, a latch bolt member in engagement With said latch retractor slide member whereby said latch bolt member may be retracted when said latch retractor slide member is reciprocated by said roll-back means but whereby said latch bolt member may be moved by end pressure independently of said latch retractor slide member, and a blocker assembly for said slide comprising a lirst cam element Within said tubular spindle, a second cam element in operating engagement with the first cam element, actuating means extending through the spindle from one of the cam elements to the exterior, and a blocker in operating engagement with one of the cam elements whereby said blocker is slidable in response to actuation of said cam elements between blocking and unblocking positions, said retractor slide having a shoulder means in alignment with the blocker when the retractor slide is in withdrawn Iposition and engageable with said blocker when the blocker is adwanced to blocking position whereby the retractor slide is Withheld in said withdrawn position.

2. A door lock comprising a relatively stationary frame having a bearing member on at least one side thereof, a tubular spindle rotatably mounted on the bearing member and having roll-back means thereon, a latch retractor slide member reciprocatably mounted in said frame for movement in transverse direction and means on the slide engageable with said roll-back means for operation thereby, a latch bolt member in engagement with said latch retract-or slide member whereby said latch bolt member may be retracted when said latch retractor slide member is reciproca-ted by said Yroll-back means but whereby said latch bolt member may be moved by end pressure independently of said latch retractor slide member, and a blocker assembly for said slide comprising a first cam element 'within said tubular spindle, a second cam element in openating engagement with the iirst cam element, actuating means extending through the spindle from one of the cam elements .to the exterior, and a blocker in operating engagement with the other of said cam elements whereby said blocker is slidable .in response to actuation of said cam elements between blocking and unblocking positions, said retractor slide having a shoulder means in alignment with the blocker when the retractor slide is in withdnawn position and engageable with said blocker when the blocker is advanced to blocking position whereby the retractor slide is withheld in said withdrawn position.

3. A door lock comprising la relatively stationary frame having a bearing member on each side thereof, a tubular spindle rotatably mounted on each of said bearing members and each said spindle having roll-back means thereon, a latch -retractor slide member reciprocatably mounted in said frame for movement in transverse direction and means on the slide engageable with said folla-back means for operation thereby, and a blocker assembly for said slide comprising a iirst cam element within one of said tubular spindles, a second cam element in operating engagement with the first cam element, actuating means extending through the spindles from one of the cam elements to the exterior on both sides of the lock, and a single blocker in operating engagement with the other of said cam elements whereby said blocker is slidable in response to actuation of said cam elements between blocking and unblocking positions, said retractor slide having a shoulder means in alignment with the blocker when the retractor slide is in withdrawn position and engageable with said blocker when the blocker is advanced to blocking position whereby the retractor slide is Withheld in said withdrawn position.

4. A door lock comprising a relatively stationary frame having a bearing member on at least one side thereof, a tubular spindle rotatably mounted on the bearing member and having roll-back means thereon, a latch retractor slide member reciprocatably mounted in said frame for movement in transverse direction and means on the slide engageable with said roll-back means for operation thereby, and a blocker assembly for said slide comprising a cam member mounted in said spindle and having an obliquely extending camway thereon, a second cam member within said spindle having a cam element extending into camming engagement with said camway, one of said cam members being movable axially, actuating means extending through the spindle from the other of said cam members to the exterior, and a single blocker in operating engagement with the cam member which is movable axially whereby said blocker is slidable in response to actuation of said cam elements between blocking and unblocking posi-tions, said retractor slide having a shoulder means in alignment with the blocker when the retractor slide is in withdrawn position and engageable when the blocker is advanced to blocking position whereby the retractor slide is withheld in said withdrawn position.

5. A door lock comprising a relatively stationary frame having a bearing member on at least one side thereof, a tubular spindle rotatably mounted on the bearing member and having roll-back means thereon, a latch retractor slide member reciprocatably mounted in said frame for movement in transverse direction and means on the slide engageable with said roll-back means for operation thereby, and a blocker assembly for said slide comprising a cam sleeve rotatably mounted in said spindle and having an obliquely extending camway thereon, a blocker having a slide-engaging portion thereof at a loca-tion spaced radially outwardly relative to said sleeve,

7 8 said blocker having an axially movable and non-rotatable ing position whereby the retractor slide is Withheld in mounting in said sleeve, and a pin on said blocker eX- said Withdrawn position. tending into engagement with said camway, rotatable actuating means extending through the spindle from said References Cited in the le of this patent sleeve to lthe exterior, said blocker being slidable in 5 UNITED STATES PATENTS response to actuation of said sleeve between blocking and unblocking positions, said retractor slide having a

Claims (1)

1. 4. A DOOR LOCK COMPRISING A RELATIVELY STATIONARY FRAME HAVING A BEARING MEMBER ON AT LEAST ONE SIDE THEREOF, A TUBULAR SPINDLE ROTATABLY MOUNTED ON THE BEARING MEMBER AND HAVING ROLL-BACK MEANS THEREON, A LATCH RETRACTOR SLIDE MEMBER RECIPROCATABLY MOUNTED IN SAID FRAME FOR MOVEMENT TO TRANSVERSE DIRECTION AND MEANS ON THE SLIDE ENGAGEABLE WITH SAID ROLL-BACK MEANS FOR OPERATION THEREBY, AND A BLOCKER ASSEMBLY FOAR SAID SLIDE COMPRISING A CAM MEMBER MOUNTED IN SAID SPINDLE AND HAVING AN OBLIQUELY EXTENDING CAMWAY THEREON, A SECOND CAM MEMBER WITHIN SAID SPINDLE HAVING A CAM ELEMENT EXTENDING INTO CAMMING ENGAGEMENT WITH SAID CAMWAY, ONE OF SAID CAM MEMBERS BEING MOVABLY AXIALLY, ACTUATING MEANS EXTENDING THROUGH THE SPINDLE FROM THE OTHER OF SAID CAM MEMBERS TO THE EXTERIOR, AND A SINGLE BLOCKER IN OPERATING ENGAGEMENT WITH THE CAM MEMBER WHICH IS MOVABLE AXIALLY WHEREBY SAID BLOCKER IS SLIDABLE IN RESPONSE TO ACTUATION OF SAID CAM ELEMENTS BETWEEN BLOCKING AND UNBLOCKING POSITIONS, SAID RETRACTOR SLIDE HAVING A SHOULDER MEANS IN ALIGNMENT WITH THE BLOCKER WHEN THE RETRACTOR SLIDE IS IN WITHDRAW POSITION AND ENGAGEABLE WHEN THE BLOCKER IS ADVANCED TO BLOCKING POSITION WHEREBY THE RETRACTOR SLIDE IS WITHHELD IN SAID WITHDRAW POSITION.

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