US 3095724 A
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Description (OCR text may contain errors)
y 2, 1963 J. A. TRUHON 3,095,724
DOOR LOCK Filed Nov. 6. 1961 :s Sheets-Sheet 1 IZIZI FIIG. I
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INVENTOR. Jon v A. TRUHON BY J. A.- TRUHON July 2, 1963 DOOR LOCK Filed Nov. a. 196i 7 3, Sheets-Sheet 2 VENTOR. 9 2 U HO N Joc-m A. M
ATTORNEYS J- A. TRUHON July 2, 1963 DOOR LOCK s Sheets-Sheet 3 Filed Nov. 6, 1961 INVENTOR. Jomv A. TRUHON ATTORNEYS United States Patent Ofi ice h 3,095,724 Patented July 2, 1963 3,095,724 DOOR LOCK John A. Truhon, Detroit, Mich., assignor to Theodore Bargman Co., Detroit, Mich., a corporation of Michigan Filed Nov. 6, 1961, Ser. No. 150,511 10 Claims. (Cl. 70-146) This invention relates to a door lock and more specifically to a dead bolt mechanism for a door look.
.It is an object of this invention to provide a door lock with a dead bolt mechanism of simple construction and very effective in its action to lock the latch bolt lot the lock in the projected, keeper engaging position.
A further object of the invention is to provide a dead lbolt mechanism for a door lock which is designed such 7 with a dead lbolt mechanism'in the unlocked condition.
FIG. 4 is a fragmentary elevational viewof the out- ;siderlock operating knob- FIG. 5 is a fragmentary view similar to FIG. 3 with the dead bolt mechanism in the locked condition. 1 ll cIG. 6 is an exploded perspective view of the door FIG. 7 is a fragmentary elevational view of the inside handle operating mechanism with the dead bolt mechanism in the unlocked condition.
, FIG. 8 is a fragmentary View of the outside knob operating mechanism with the dead =bolt mechanism in the unlocked condition.
p, FIG. 9 is a view similar to FIG. 7 with the dead bolt mechanism in the ,locked condition.
FIG.v 10 is a view similar to FIG. 8 with the dead .bolt mechanism in the locked condition.
\FIG. 11 is a fragmentary plan view of the latch assembly for the dead bolt mechanism.
FIG. 12 is a sectional view along the line 12-12 in FIG. 11.
, Experience has shown that many door locks are provided with dead bolt. mechanisms which aresusceptible to being accidentally actuated to either the locked or the unlocked condition upon slamming the door shut.
This is particularly true of door locks which are presentr 1y being installed on the outside doors .of mobile homes. Such a mobile home is shown at 10 in FIG. 1. outside or the access door is indicated at 12 and the door lock therefor is indicated at 14. The door 14 is mortised as at 16 to receive the lock and the door frame,
as is conventional, is mortised as at 18 for accommodating a keeper 20 with which the latch bolt 22 of the door lock is engageable to retain the door in the closed position. The door lock of this invention includes an outside plate 24 on which is journalled a spindle 26 to which an outside knob 28 is aflixed. The inside plate 30 journals a spindle 32 to which an inside operating handle 34 is afiixed. On the inner side thereof, outside plate 24 has a pair of threaded sockets 36 adapted to receive screws 38 extending through the inside plate 30 to secure the two handle assemblies on the opposite faces of door 14.
The latch bolt 22 is slideably retained for reciprocation in a guide plate 40. Latch bolt 22 has a U-shaped portion 42, the free ends of the legs thereof being fashioned with projecting lugs 44. Springs 46 hearing against the ends of the legs of the U-shaped portion 42 normally bias bolt 22 outwardly to the projected position. Bolt 22 is retained on guide plate 40 by means of a cover plate 48. Guide plate 40 with its cover plate 48 is secured to the outside plate 24 by means of four screws 50 which extend through registering apertures 52, cover plate 48 and guide plate 40. Screws 50 thread into upstanding sockets 54 formed on the inner face of outside plate 24.
Guide plate 40 and cover plate 48 are provided with registering openings 56, 58 through which extends a sleeve 60 of square cross section. A pair of spacer rings 60a on sleeve 60 engage the opposed inner faces of guide plate 40 and cover plate 48 to retain sleeve 60 in position. One end of sleeve 60 projects through opening 56 in guide plate 40 and is telescopically engaged with the square shank of inside spindle 32. The other end of sleeve 60 projects through opening 58 of cover plate 48 and receives a cam 61. As is most clearly illustrated in FIG. 6, the inner face of outside plate 24 is fashioned with a pair of parallel ribs 62 which form a guideway for a rectangularly shaped latch slide 64. Latch slide 64 has an elongated central opening 66 through which the square end portion 68 of the outside spindle 26 projects. Latch slide 64 is preferably formed as a casting which is recessed on the face thereof adjacent the outside plate 24. The recessing is provided by ribs ion the casting as illustrated. On the square end portion 68 of the outside spindle 26, there is mounted an outside cam 63. Cam 63 is fixed on spindle 24 by means of a washer and a screw 67.
Within the outside spindle 26, there is arranged a keyoperated lock cylinder 72 provided with a radially extending pin 74 at its inner end. Pin 74 projects through an arcuate slot 76 in spindle 26. Pin 74 is designed to shift slide 64 in opposite directions in the guideway formed by ribs 62 by engaging the abutments 80, 82 at the periphery of opening 66 in slide'64. When the lock cylinder 72 is actuated in the unlocking direction of rotation, pin 74 engages abutment 80 to shift slide 64 in a direction to the left as viewed in FIG; 8 and when the lock cylinder is rotated in the locking direction, then pin 74 engages abutment 82 to shift slide 64 in a direction towards the right as viewed in FIG. 8. One of the ribs 62 on the outside plate 24 is provided with a pair of notches 84, 86 in which a spring biased bearing ball 88 is adapted to seat for yieldingly retaining the slide 64 in either of its two extneme positions of reciprocation (FIG. 8).
It will be noted that the lugs 44 on bolt 22 project through a pair of elongated slots 89 on cover plate 48.
. It will also be observed that cam 61 is fashioned with The' a shoulder 90 and cam 63 is fashioned with a pair of arms 92. When the inside door handle 34 is pivoted downwardly or in the clockwise direction as viewed in FIGS. 7 and 9, shoulder 90 engages the upper lug 44 of the latch bolt to retract the bolt and likewise, when the outside knob 28 is rotated in either one direction or the other, the arms 92 engage the lugs 44 to retract the bolt 22.
Referring now to FIGS. 2, 3 8 and 10, it will be noted that the face of slide 64 adjacent the cam 63 is fashioned with a pair of circular stud portions 94, 96. These stud portions are disposed on diametrically opposite sides of cam 63. Cam 63 is fashioned with a notch 98 in its outer periphery which, in the normal position of the camis radially aligned with stud 94. When slide 64 is shifted to the right as viewed in FIGS. 8 and 10 by actuating the lock cylinder, stud 94 is shifted into notch 98 to thereby prevent rotation of cam 63. In this position of slide 64, the outside knob 28 is effectively prevented from being rotated and thus, the bolt 22 is prevented from being retracted by cam 63. It will also be noted that the stud 94 together with the action of the spring biased bearing ball 88 in the notch 86 effectively locks cam 63 against rotation.
Referring now to FIGS. 6, 11 and 12, it will be noted that a latch assembly 100 is pivotally supported on cover plate 48. Latch assembly 100 includes a hinge plate 102 fixedly secured to cover plate 48 as by rivets 104, a latch member 106 having ears 108 at one end hooked behind the reversely bent hooks 1-10 of hinge plate 102 and a leaf spring 112. Cover plate 48 is suitably apertured as at 114 to accomodate latch 106 and the reversely bent hooks 110 of hinge plate 102. Latch 106 is formed with a shoulder 116 adjacent the free end thereof and with a cam projection 118 at the central portion thereof. Cam projection 118 extends from the plane of latch 106 in the direction towards slide 64. The stud 96 is located on slide 64 such that when the slide is shifted to the locked position, post 96 engages cam projection 118 to pivot latch 106 toward bolt 22 to a position wherein shoulder 116 engages behind the bight section 120 of the U-shaped portion of the bolt to prevent retraction of the bolt as is illustrated in FIG. 9.
Latch 106, by operating directly on the bolt, provides an anti-jimmy feature.
Cam 61 is fashioned with a recess 122 in which post 96 is located. In the locked position of the bolt, a wear bushing 124 on post 96 engages the cam edge 126 of recess 122 and is spaced from the opposite edge 128 of recess 122 (FIG. 9). With the bolt 22 in the locked position, when the inside handle 34 is turned downwardly, cam 61 rotates in a clockwise direction as viewed in FIG. 9 and the cam edge 126 of recess 122 engages the wear bushing 124 to shift slide 64 from the position shown in FIG. 10 to the position shown in FIG. 8'. Thus, post 96 moves out of engagement with cam projection 118 so that latch 106 is pivoted out of the path of travel of bolt 22 by spring 112 and post 94 is shifted out of recess 98 in cam 63. When slide 64 is disposed in the bolt releasing position, post 94 engages the edge 128 of recess 122 in cam 61 as is shown in FIG. 7.
1. In a door lock, the combination of an axially reciprocable bolt projectable into locking position with a keeper, means normally biasing the bolt to the projected locking position, individually operable inside and outside spindles for operating said bolt, said bolt having an abutment thereon, each spindle having a cam which, when the spindle is rotated, is effective to engage the abutment and retract the bolt, an outside plate in which said outside spindle is journalled, said outside plate having a guideway thereon, a slide movable in said guideway in a direction parallel to the path of travel of the bolt, said outside spindle having a key actuated lock cylinder co-axial therewith, said lock cylinder having a radial projection engageable with said slide to reciprocate the slide in the guideway when the cylinder is key actuated, said outside cam being disposed axially adjacent said slide and having a recess therein, said slide having a projection normally radially aligned with said recess in said outside cam and engageable therein when the slide is actuated by said cylinder in one direction to thereby lock the outside cam against rotation, said slide having a second projection thereon, the inside cam having a cam edge thereon engageable with said second projection to shift the slide in the opposite direction out of locking engagement with the outside cam in response to rotation of the inside cam.
2. The combination set forth in claim 1 wherein said slide is provided with a spring biased detent thereon movable in a direction generally perpendicular to the path of travel of the slide, said outside plate having a pair of spaced recesses therein adapted to be engaged by said spring biased detent to resiliently retain said slide in a first position wherein the first projection on the slide is in engagement with the recess on the outside cam and in a second position wherein the first projection on the slide is out of engagement with the recess on the outside cam.
3. The combination set forth in claim 2 wherein the projections on the slide are located on diametrically opposite sides of the axis of said outside spindle.
4. The combination set forth in claim 2 wherein said two projections are located on a line extending perpendicularly through the axis of said outside spindle and parallel to the path of travel of the slide.
5. The combination set forth in claim 4 wherein the outside cam is disposed axially between the slide and the inside cam.
6. The combiation set forth in claim 5 wherein the inside and outside spindles are co-axially aligned.
7. The combination set forth in claim 1 wherein the paths of travel of the bolt and slide and the planes of rotation of the inside and outside cams are all parallel to one another.
8. The combination set forth in claim 7 including a latch supported for pivotal movement in a direction generally perpendicular to the plane of rotation of the inside cam, said latch having a cam surface in the path of travel of the second projection on the slide and en'- gaged thereby when the slide is shifted to interengage with and lock said outside cam whereby to pivot the latch into the path of travel of the bolt and thereby lock the bolt against retraction.
9. The combination set forth in claim 8 including a spring normally biasing said latch in a direction axially toward the plane of said slide.
10. In a door lock, the combination of inside and outside operating handles, a reciprocable latch bolt shiftable to engage and release a keeper mounted on a door frame, inside and outside cams fixed on the respective operating handles for retracting the latch bolt, a slide, a lock cylinder in said outside handle operable to reciprocate the slide, means on the slide and outside cam interengageable when the slide is reciprocated in one direction to lock the outside cam against rotation and thereby lock the bolt against retraction by the outside handle, said inside cam having a cam portion thereon which, when the inside handle is rotated, engages said slide to effect disengagement of the slide and the outside cam, said bolt having an abutment thereon, a latch shiftable in a direction toward and away from said bolt to engage and disengage the abutment on the bolt, said latch, when engaged with the abutment on the bolt, preventing retraction of the bolt from the projected position, said slide having means thereon for shifting the latch toward the bolt to interengage the latch and bolt when the slide is shifted to the bolt locking position, said slide being provided with a projection extending toward said latch, said projection being engageable by said cam portion of the inside cam to effect said disengagement of the slide and outside cam, said latch having a cam portion engaged by said projection when the slide is shifted to the bolt locking position.
References Cited in the file of this patent UNITED STATES PATENTS 269,421 Hutson Dec. 19, 1882 1,858,525 Schroeder et a1. May 17, 1932 2,357,551 Schlage Sept. 5, 1944 2,634,598 Kaiser Apr. 14, 1953 2,831,336 Schlage Apr. 22, 1958 2,942,451 Windmassinger June 28, 1960