US2612771A - Door lock - Google Patents

Description

Filed March 12, 1948 3 Sheets-Sheet 1 Oct. 7, 1952 c, CLARK 2,612,771

DOOR LOCK IN V EN TOR. Ra/p /7 a. 0/0 k o/weys R. C. CLARK Oct. 7, 1952 DOOR LOCK 3 Sheets-Sheet 2 Filed March 12, 1948 Oct. 7, 1952 R. c. CLARK 77 DOOR LOCK Filed March 12, 1948 3 Sheets-Sheet 3 8 (0 (0O so INVENTOR. 244 6. Clark 5L BY Patented Oct. 7, 1952 ,UNiTED sT TEs A'TENT C F noon LOCK Ralph Clark, Willtiwbrook, Califgassig norto Ray E.'Cla'rk, Willowbrook, Calif. Q"

Application March 12, 1948, Serial it-14 ,419

' a cl ms. (on. 70-146) This invention relates to improvements in locks, and more particularly to an improved mortise lock for a house'door. c

It is among the objects of "the invention to provide an improved lock which may be mounted in a door Without the use of any screws threaded also be locked from theinside so-that it cannot be operated from the outside, which requires only a circular hole extendingthrough the door and an intersecting bore extending from the edge of the door to the hole for the mounting of the lock in a door, and which is simple, durable and economical in construction, and neat and attractive in appearance. Other objects and advantages will become. apparent from a consideration of the following de-' scription in conjunction with the accompanying drawings, whereinzix Figure 1 is a perspective view of the lock in longitudinal cross-section; a ,7

Figure 2 is an exploded, perspective view of the lock components in position for assembly; Figure 3 is a longitudinal cross-section of the lock installed in a door and is taken substantially in the plane of the section line 3-3 of Figure 1; Figure 4 is a longitudinal cross-section similar to Figure 3, but taken in a plane perpendicular to the sectional plane of Figure 3; a Figure 5 is a transverse cross-section of th lock installed in a door and is taken substantially in the plane of the section line 5-5 of Figure 1; Figures 6 and 7 are views similar to Figure 5, but showing the. latch bolt andbolt-operating spindles in different operative positions from that illustrated in Figure 5; v f:

Figure 8 is a transverse cross-section taken substantially in'the plane of the section line 8-8 of Figure 1; Figure 9 is a transverse cross-section taken substantially in the plane of the section line 99of Figure 1; a 1 Figure 10 is a cross-sectional view of a portion of the inner escutcheon plate showing the application thereto of-a slidable pin for locking the inner knob of the lock; and

Yr-2f- Figure 11 is an elevation of the lock showing a modified form of the invention.

a, .With continued reference to the drawings, the i improved lock comprises, in general, an outer es:

cutcheon structure i ii, a hollow lock bolt housing slidably engaged at its inner end by the. structure III, a latch bolt i2 slid'able in the housing?! i a knob spindle 13, an outer knob i i mounted on the outer end of thespindle l3, aninner knob 15 mounted on the inner end of the spindle, an inner. escutcheon plate Iii surroundingthe spindle at the inner end of the inner'knob, screws 'll operatively connecting the inner knob and inner escutcheon plate to the. outer-escutclrieon'struc-l'v i ture II], a lock tumbler barrellB, secured ina bore in the outer knob, a key cylinder is operatively mounted in the tumbler barrel, and-a key spindle a 2D operatively engaged atone endby the key cylinder l9 and extending'through the lock bolt ii. A dead bolt pin 2'i-extends throughthe inner escutcheon plate 16 for operative engagement with the latch bolt l2 to secure the lock against operation, and a locking'pin 22 is slidablycarried by 1 the inner escutcheonplate it for locking the knobs and the .knob spindle l3 against'rotationr inwardly of the aperture oi -opening 25 at'the inner face of the escutcheon plate formation 24.

The segments 2! have respective grooves 29 in their inner fiat faces parallel to and adjacent corresponding edges of the segments, and screw-.. threaded wells 30 extending inwardly of the segments from the ends thereof opposite the es-y cutcheon, plate formation 24,- The segments 2? are disposed inwardly of the periphery of the escutcheon plate formation 24 to provide an annularshoulder 3| extending entirely around the inner face of the plate formation, thesegments being so spaced as to fit into a circular hole provided in a door and the shoulder 3 l being' adapted to bear against the door surface surrounding the v I The length of segments 21 is such as to extend substantially hole at the outer side of the door.

through a door of the minimum thickness to which the lock is to be applied; The'lock; however, is readily adaptable to thicker doors without in any way "changing the as will presently appear.

inner end oft he structure thereof,

The outer knob 14 is provided with a cylindrical axial bore 32 extending therethrough and surrounded at the inner side of the knob by an annular boss 33 and a semi-circular flange 34 extending inwardly of the aperture at the inner end of the boss.

The lock tumbler barrel l8 and key cylinder l9 are of conventional construction and do not require a detailed description; The. tumbler barrel I8 is secured in the bore 32 of the knob against rotation relative to the knob and is provided with spaced-apart radial bores in which conventional tumblers 33 are slidably received and in which the tumblers are held by. a dovetailed plate I34 slidably received in. a dovetailed groove provided inv the barrel at the outer ends of the tumbler bores. Thei'key cylinder [9 is normally held against rotation in the barrel. 1.8 by the tumblers 33, but .may be rotated by the proper key when inserted into the cylinder in the conventional manner; The inner end ofthe key cylinder has an apertured lug.. 35 thereon operatively connecting the key cylinder-to the key spindle 20. r

The-knob spindle l3 comprises a semi-cylindrical'intermediate portion 3'5 having a semicylindrical concavity 3! in' the flat face. thereof, a semi-cylindrical flange138 at the outerendof the portion 36 and an elongated,-square or-noncircular shank 39 extending from the inner end of the semi-cylindrical portion 36 substantially coaxially therewith. The semi-cylindrical cavity 31 terminates. in a perpendicular shouldernlil spaced from the innerface of flangel38 and a semi-cylindricalconcavity 4 l of'materially'smaller radius-than tberadius of. the concavity 31 extendsfrom the shoulder 4ll'.to the flanged outer end of the spindle.

The key spindle 29 comprises a semiecylindrical end portion 42 receivable. in nesting association in'the concavity 3'! of the knob .zspindle li3,'a cylindrical intermediate 3 portion 43 which fits in the smaller concavity 4| 'Ofthdfkl'lObSDiIldlG, and an enlarged cylindrical. end: portion. having a diameter substantially equal tothat ofthe flange 38 of the lock spindle and having a noncircular recess 45 in the outerend'thereof into which the lug 35 of thekey cylinder IBrfits.

The outer escutcheon structure l0,knob-spindie l3, key spindle 2U, knob l4, tumbler barrel l8 and key cylinder l9 are operatively associated; in1the following manner to provide ayprimarysubassembly.

First, the key cylinder is. is placed in operative position in the tumbler barrel 18. :The lug35 ofv the key cylinder is then inserted into the recess 45. in theend portion 44 of the-key spindle!!! and a locking pinin the form of a screw 46 is inserted through a diametrical aperture-41in the socket 44 and throughthe aperture in-the key cylinder lug 35 thus positively connecting the key cylinder to the key spindle. The key spindle is then nested in the lock. spindle l3 and this entire structure is,- inserted through the outer knob l4.from the .outerend, of the knob, until the flange 38 of the knob cylinder is in alignmentwith the semi-circular flange- 34 at the inner end of the knob bore with the ends of the flanges mutually opposed to holdthe knob. spindle against rotation relative to the outer knob" [4. -It is understoodthat when the tumbler barrel 18 is inserted into the knob bore, itis secured against rotation relative to the knobby some convenient means, such as interfitting, non- 4 circular portions of the bore and the tumbler barrel.

With the spindles and the tumber barrel and key cylinder held in operative position in the outer knob, the ends of the spindles projecting from the inner end of the knob are now inserted through the central aperture 25 in the escutcheon structure I0 in an inverted position such that the: aligned flat faces of the semi-circular portions of the spindles pass over the shoulders of the flange 28 in the escutcheon plate formation of the lock barrel. When the outer end of the .boss. 26 of the escutcheon plate formation 24 is broughtinto contact with the inner end of the Y knob'bossj 3.3, the semi-circular flange 28 will be in alignment with a circumferential groove 48 provided in the outer surface of lock spindle 13 adjacent the inner face of flange 33. The knob and spindle assembly is now rotated through seating the flange 28 in the groove 48 to secure the knob and spindle assembly against separation from the outer escutcheon structure ID. This sub-assembly is now ready for the association of the latch bolt housing and latch bolt therewith;

The latch bolt housing I l is an elongated tubular' member of rectangular cross-section having transverse grooves 50 in its normally upper and lower outer faces providing shoulders 5| which are slidably received in'the grooves 29 of the structure It). At its outer end, the housing II is provided with an outwardly-extending flange or shoulder 52 received in a recess provided in the edge of-the door surrounding the outer end of a bore 53 provided in the door to receive the latch housing II. If desired, brads or screws 54 may be inserted through suitable apertures in this shoulder and into the door to assist in holding the housing in operative position in the bore. This housing is provided intermediate the length of opposite sides thereof with elongated openings 55 foraspring stop plate 56, the purpose of which will be further described in connection with the construction of the latch bolt [2, and with an-aperture 51 for the inner end of the dead bolt pin 2 I.

The latch bolt 1 2 comprises an elongated member of rectangular cross-section having its outer end beveled at one side, as indicated at 58, and having an elongated spring-receiving slot 59 intermediate the length thereof, a spindle-receiving slot or opening :60 of substantially square shap'enear" the rear end thereof, and a hole 6i to: receive the-inner end of the dead bolt pin 2!.

'Thellatch bolt housing 'Il, latch bolt l2 and latch. bolt spring constitute a second sub-assembly provided by placing the spring in the spring-receiving slots 55 in the latch bolt, inserting thelatch'bolt in the housing, and then inserting-the spring abutment plate 56 through the housing openings 55 at the rear end of the springyso thatthe compression spring 62 will besoperative" to resiliently force the latch bolt outwardly of the housing to the operative position illustrated in-Figure 5.

In order toassemble the latch bolt sub-assembly with the primary sub-assembly described above," the latch bolt housing is inserted in the bore 53 'provided'therefor in the door with the shoulders at the inner end thereof positioned at the correspon'ding side of the hole 63 provided in-the:door'fora'the'lock barrel I 0. With the latch" bolt' and housing assembly in position, the outer escutcheon structure is then inserted in the hole 63 and the grooves 29 slidably receivethe shoulders to positively secure the latch bolt housing to the outer escutcheon structure. Movement of the latch bolt l2 in the housing II is limited by a stop pin 64 extendin'gthrough an elongated slot 65 in the latch bolt and having its ends secured in apertures provided in the opposite side walls of the latch bolt housing. I When the barrel is being inserted in the hole 63in'the door, the latch bolt is preferably forced rearwardly against the action of spring 62 so that the spindles l3 and will pass freely through the spindle-receiving slot 60 in the latch boltl Once the spindles are in operative position in the slot 60, the pin 64, restricting rearward movement of the latch bolt, will prevent the knob spindle 13 from being rotated to an extent such that it can be disassociated from thebarrel structure Hi. a

After the primary sub-assembly, including the lock barrel, spindles and outer knob, has been operatively associated with the secondary subassembly, including the latch bolt and latch bolt housing, the inner knob 15 and inner escutcheon plate I6 are sub-assembled and then associated with the primary sub-assembly. i

The inner escutcheon plate l6 comprises a fiat, circular plate structure having a central aperture 65 surrounded at the outer side of the plate by a boss 66, eccentric apertures 51 for the screws 17, a radial groove 68 in its inner face in which the locking pin 22 is slidably mounted, and an aperture 69 for the dead bolt pin 25.

The inner knob 15 has a cylindrical shank [0 provided with angularly-spaced, radial holes H .to receive the inner end of the locking pin 22 and with a circumferential groove 12 spaced outwardly from these holes. This knob also has an elongated axial well 13 of the same cross-sectional shape and size as the cross-sectional shape and size of the shank 39 of the knob spindle 13. In order to assemble the inner knob 55 withfthe inner escutcheon plate i6 'the'knob shank is inserted through the central opening in the plate, a suitable thrust Washer M is placedfover the shank to bear against the inner side of the escutcheon plate, and a snap ring 15' is secured in the circumferential groove 12 holding the knob in operative association with the escutcheon plate.

After completing the inner knob and escutcheon plate sub-assembly, this sub-assembly is associated with the primary sub-assembly by insorting the inner end of shank 39 in the well 13 in the inner knob and moving the inner knob toward the outer knob until the inner escutcheon plate 12 bears against the inner face of the door. The screws I! are then inserted through the corresponding holes in the inner escutcheon plate and threaded into the screw-threaded holes provided in the segments 21 of the lock barrel and tightened until the door is firmly clamped between the inner escutcheon plate if and the outer escutcheon plate formation 24 of the lock barrel structure. The lock is now completely as-' sembled in the door. The length of screws 11 is suflicient to compensate for different door thicknesses.

When the lock is free, the knob spindle I3 I may be rotated by either the outer or inner knob.

can be opened from the outside only by use of a key, the locking pin 22 is moved inwardly by suitable means, such as the toggle lever i6, until its inner end isengaged in one of the radial holes 1 I provided in the shank of the inner knob. With the inner knob thus locked against rotation, the knob spindle [3 cannot be rotated and the door cannotbe opened by the outer knob, or by either knob until the locking pin is withdrawn. If it is now desired to open the door from the outside, akey TI is inserted in the key cylinder I9 and rotated, which operation will rotate the key spindle 20, as particularly illustrated in Figure7, moving the latch bolt l2irearwardly suf-- ficiently to release the lock. If it is desired to secure the door so that it cannot be opened with a keyfrom the-outsida'the dead bolt pin 2i is pushed inwardly so that its-inner end engages in the corresponding hole 6| in the latch bolt in which case the latch bolt cannot be withdrawn by either the knobs or a key. i

i In the modified form of the invention illustrated in Figure 11-, thejinner knob I5 is omitted and a hub member issecured on the inner end of the knobspindle shank -39.' This hub structure has an arm '8l extending radially therefrom and a flexible loopor pull member 82 is secured to the outer end of the arm for rotating the spindle, 'If desired,-the' hub structure'and arm may be e'nclosed'in a'bell-shaped housing '83 having an arcuateslot'84 therein and a pin on the outer end'of theiarm may extend through the slot 84 and have the pull cord a2 attached thereto outside 'of the housing.

The invention may be embodied in other specific forms without departingfrom' the spirit or essential characteristics thereof. The present embodiments are'ytherefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are, therefore, intended to be embraced therein. 1

I claim:

1. A door lock comprising an outer escutcheon structure having a centrally-apertured outer escutcheon plate formation thereon, a latch bolt housing operatively connected at its inner end to said structure, a latch bolt slidable in said housing and having a spindle-receiving opening adjacent the inner end thereof, a knob spindle extending through said outer escutcheon structure and said latch bolt operative upon rotation. thereof toretract said latch bolt, an outer knob and an inner knob operatively associated with said knob spindle at corresponding ends thereof, a tumbler barrel and key cylinder in said-outer knob, a key spindle having one end connected to said key cylinder and its opposite end extending through said latch bolt to retract the latter upon rotation of said key spindle, a formation on the outer end of said knob spindle locking said spindle and said outer knob against relative rotation, formations on said spindles maintaining said spindles, said outer escutcheon structure and the. inner end of. said inner: knobs meansreleasably attaching said inner escutcheon plate-to said outer escutcheon. structure, :and: locking. .means carried by saidinnerescutcheon plateand. opera-- tively engageable with said inner knob to restrain said knobs and. said; knobspindle against rotation to retract said latch bolt.

2. In a door lock, an outer. escutcheon structure including a centrallyr-apertured escutcheon plate formation, having a semi-circular flange in the central aperture thereof, .and a pair of tongues of partly cylindrical; shape having flat inner. faces. disposed oneateachsideaot said-central aperture 7 and provided respectively .with screw-threaded wells inthe ends: thereof opposite said escutcheon plateformation; and having longitudinal grooves in; said flat ginner' facesad-j acent corresponding edges thereon. :a hollow. latch bolt housing having, shoulders at itsinner end=slidably received in. said grooves, a .latch-rboltgslidable, in.

said housing; having initsinner-end-a spindle slotaligned with saidcentral aperture, acentrally-apertured inner escut.cheon;-pla te-, screw fasteners threaded into said wells insaid-tongues securing said inner escutcheon plate-to said outer escutcheon. structure, a knob spindle extending through the central apertures otfl. ;said inner. and.

outer escutcheonplates-and having-a groove therein rotationallyinterlocking with said semi cylindrical. flange, st p. -meansacting. :between said latch bolt housing and said. latch-boltrrestraining said knob spindle against rotation 'sufficient for dlsassociation thereof from; said outer escutcheon plate formation, an outer knob secured on the outer. end. of said knob-spindle, and an inner knob .operatively associated with the inner end of said knobsplnclle.

3. Ina door lock, an outer. escutcheon structure including a centrallyapertured escutcheon plate formation having a semi-circular. flange. in the central aperture thereof, and-a pair of tongues of partly cylindrical shape having fiat inner. faces disposed one at each side ofsaid central aperture and provided respectively with screw-threaded wells in the ends opposite said-escutcheon plate formation andwithlongitudinal grooves in. said flat .inner .faces :adlacent corresponding edges thereof, a hollow latch bolt housing having shouldersat. its innerend slidably received in said gr0oves,;a.latch bolt slidable in said housing having .inits. inner end a spindle slot aligned with said central aperture, a centrally-apertured inner escutcheonplate, screw fasteners threaded into said wells insaid tongues securing said inner escutcheon plate to said outer escutcheon structure, aknob spindle extending through the central apertures of said inner and outer escutcheon plates and. having a groove therein rotationally interlocking with said semiecylindrical flange, stop means acting between said latch bolt housingandsaidv latch-bolt restraining said knob spindle; against rotation sufficient for disassociation; thereof. from saidouter escutcheon plate formation, an outer knob secured on the outer end of said knob spindle, an inner knob operativelyassociated withthe inner end of said knob spindle, saidouter knob having an axial bore and .asemi-circular flange in the inner end of said bore, and. said knob spindle having a semicircular fiange on its outer end, said knob and spindle flanges having mutually opposing ends when said spindle is operatively associated with said, knobto restrain said knob and. said spindle against; relative rotation.

RALPH C. CLARK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 588,673 Wyman Aug. 24, 1897 812,904 Voight Feb. 20, 1906 866,583 Hope Sept. 17, 1907 1,895,414 Huffman Nov. 1, 1921 2,062,598 Nilsen Dec. 1, 1936 2,479,174 Lickteig Aug. 16, 1949 2,510,746 Kleeberg June 6, 1950 2,525,340 Clark Oct. 10, 1950 2,544,959 Hillgren Mar. 13, 1951

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