US3561805A - Door locks and handles therefor - Google Patents

Door locks and handles therefor Download PDF

Info

Publication number
US3561805A
US3561805A US715252A US3561805DA US3561805A US 3561805 A US3561805 A US 3561805A US 715252 A US715252 A US 715252A US 3561805D A US3561805D A US 3561805DA US 3561805 A US3561805 A US 3561805A
Authority
US
United States
Prior art keywords
casing
latch bolt
door
pushbutton
operator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US715252A
Inventor
Albert Shaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STREBOR DIECASTING CO Ltd
Original Assignee
STREBOR DIECASTING CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STREBOR DIECASTING CO Ltd filed Critical STREBOR DIECASTING CO Ltd
Application granted granted Critical
Publication of US3561805A publication Critical patent/US3561805A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C1/00Fastening devices with bolts moving rectilinearly
    • E05C1/08Fastening devices with bolts moving rectilinearly with latching action
    • E05C1/12Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00Closure fasteners
    • Y10T292/08Bolts
    • Y10T292/096Sliding
    • Y10T292/0969Spring projected
    • Y10T292/097Operating means
    • Y10T292/0993Gear
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/50Special application
    • Y10T70/5093For closures
    • Y10T70/5155Door
    • Y10T70/5199Swinging door
    • Y10T70/5372Locking latch bolts, biased
    • Y10T70/5385Spring projected
    • Y10T70/5389Manually operable
    • Y10T70/5496Freely movable external manipulator

Definitions

  • ABSTRACT ' A pushbutton for operating a lock bolt through a [51] Int. Cl E05! 55/06; rack and pinion to provide a movement of the bolt greater EOSc 1/ l 4 than the movement of the pushbutton.
  • SHEET 3 [1F 3 DOOR LOCKS AND HANDLES THEREFOR This invention relates to improvements in door locks and handles therefore and is particularly applicable for use on caravans and other doors where a handle substantially flush with the outer surface of the door is required.
  • the object of the invention is the provision of a rotary or pushbutton-type handle which operates a rack to move the latch or bolt, the movement of the pushbutton being less than the movement of the latch or bolt.
  • a spring-loaded rotary pushbutton barrel is mounted to move transversely of the door to engage a sliding rack engaging a pinion mounted on a spindle. rotation of the spindle causing a second pinion thereon to actuate a rack on the latch or bolt, a peg on the barrel being mounted eccentrically of the sliding rack whereby on rotation of a key the peg on the barrel is brought out of engagement with the sliding rack to prevent actuation of the latch or bolt.
  • FIG. 1 is a part elevation of a door with the lock in position thereon viewed from the outside of the door;
  • FIG. 2 is an elevation of same from the inside of the door
  • FIG. 3 is an end view of a door with the lock in position thereon;
  • FIG. 4 is a transverse section through the door and lock
  • FIG. 5 is a section at right angles to FIG. 4;
  • FIG. 6 is a detailed section on line 6-6 FIG. 2;
  • FIG. 7 is a plan view of the latch bolt
  • FIG. 8 is a plan of the inside casing from the underside with the base plate removed.
  • a door lock is formed in two parts, A the part A being mounted on the inside of the door C and operated by a rotary handle a and the part A being mounted on the outside of the door C and operated by a key inserted in a pushbutton barrel F.
  • a latch bolt B slides longitudinally of the casing A.
  • the bolt B (FIG. 7) is formed with a nose to engage a recess in the door post C and with rack teeth b on both sides of a central recess b' and with lugs b at the end remote from the nose.
  • the bolt B is also provided with longitudinal side flanges b engaging slides a on the casing A.
  • Casing A has further slides a engaged by the faces of the lugs b
  • the bolt is urged toward the position shown in FIG. 4 by a spring a mounted on a pin a having its head seated in a recess a in the casing with the opposite end of the spring extending into a recess b" in the end of the bolt remote from the nose.
  • the bolt B is released against the spring a by rotation of a spindle (FIG. 5) on which are keyed pinions d engaging the rack teeth b on the bolt.
  • a further pinion d of less diameter than the pinions d is also keyed on the spindle and is engaged by rack teeth d on a flanged slide D mounted between guides 11 on the casing A. Slide D moves at right angles to the direction of movement of latch bolt B, passing through opening b of the latch bolt.
  • the bolt B is operated by the rotary handle a passing through the casing A and mounted on a spindle a carrying a quadrant-shaped lever a the ends of which engage the lugs b on the bolt.
  • the bolt may be locked in the withdrawn position by a catch d sliding transversely of the casing A to engage a stop b on the bolt B.
  • the bolt is held in position in the casing by a base plate a l.
  • the part A of the lock in the form of a plate for the outside of the door A barrel F is rotatable in a housing a rotated by a key inserted in the barrel and operated as a pushbutton latch against the action of a spring f mounted in a recess in the easing A.
  • the central part of the inner end of the barrel F is constructed with an eccentric peg f extending through a hole or aperture in the casing A.
  • the housing of barrel F is mounted in a finger plate f secured to the casing A by a screw 1.
  • the casing A lies substantially flushed with outer surface of the door C with a recessf formed in the casing beneath the finger grip f which is employed for opening the door when a latch B is released.
  • on on the lock barrel F engages the head of a screw 11" or like adjustable member projecting from the end of the rack slide D whereby when the barrel F is moved inwards against the springfpegj abuts screw d and displaces the rack D to rotate the pinion d.
  • the resulting counterclockwise (FIG. 4) movement of the pinion d rotates the pinions d in engagement with the rack teeth b on the bolt B thereby withdrawing the bolt into the easing A to release the door.
  • the casings A, A are secured in position on the door by screws A extending from the part A and into the Part A.
  • the rack D is provided with the adjusting screw J to determine the position at which the rack D is engaged by the P sfl
  • the pushbutton barrel F is depressed to operate the latch bolt 8 through the racks and pinions and is returned to the normal position by the spring f.
  • the barrel is rotated to bring the peg f out of engagement with the screw (1 thereby preventing pushbutton actuation thereof.
  • a door lock assembly of the type adapted to be used on doors where an outside handle is substantially flush with the other surface of the door comprising casing means secured in an opening in the door. a latch bolt slidably mounted in said casing means and having a latching portion for projecting out of one end of the casing, a first resilient means biasing said latch bolt toward latched position, a pushbutton operator slidably mounted in the outer sidewall of the casing for movement in a direction at right angles to movement of the latch bolt, a second resilient means biasing said pushbutton operator outwardly toward retracted position, a slide member in said casing means mounted for movement parallel to said pushbutton operator.
  • an eccentric internal projection on said pushbutton operator rotatable about an axis parallel to the direction of movement of said pushbutton operator, abutment means on said slide member adapted to be engaged by said projection during inward displacement of said pushbutton operator only in a predetermined rotate position of said projection, motion transmitting mechanism within the casing means interposed between said slide member and said latch bolt for translating inward displacement of said slide member by said pushbutton operator into amplified latch bolt retraction movement, and means extending through the inner side of said casing adapted to retract said latch bolt independently of operation of said button operator, said abutment means comprising a projection on said slide that is adjustable toward and away from the projection on said pushbutton to accommodate said assembly to doors of different thickness.
  • key operated means operable only from the outside of the door for rotating said projection.
  • said motion transmitting mechanism comprising rack and pinion means providing amplified displacement of said latch bolt upon a given displacement of said pushbutton operator.
  • said casing means comprising an outer casing member mounting said pushbutton operator and an inner casing member mounting said latch bolt, and means rigidly connecting said casing members together and to the door at said opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

A pushbutton for operating a lock bolt through a rack and pinion to provide a movement of the bolt greater than the movement of the pushbutton.

Description

United States Patent [72] Inventor Albert Shaw [50] Field of Search 292/ l 72, Bolton, England 279, (P80), 335; 70/190, 191. I70, 149.11.13, [2| 1 App]. No. 715,252 B5 [22 Filed Mar. 22, 1968 [45} Patented Feb. 9, 1971 References Cited [73] Assignec Strebor Diecasting Company Limited UNITED STATES PATENTS Radcliffe. England 2,279,591 4 1942 Heyer 292/335 a y corporate of Great Brim" 1,195,881 8/1916 Van Wetzinga 292 172 1 1 Pnomy p 22, 1,211,437 1 1917 Gruber 292 172 1 Great Britain 1,770,917 7/1930 Hall 292/279 l 18656/67 2,322,892 6/1943 Springer 70/149 2,636,376 4/1953 McConnell 292/ l 72X Primary ExaminerMarvin A. Champion Assistant Examiner-Edward 5 Claims, 8 Drawing Figs. AttorneyNorris & Bateman [52] US. Cl 292/172,
70/ l 49 ABSTRACT:' A pushbutton for operating a lock bolt through a [51] Int. Cl E05!) 55/06; rack and pinion to provide a movement of the bolt greater EOSc 1/ l 4 than the movement of the pushbutton.
1 0 Q A s z 1/ ll 1 j b r 5 C a g '2 ,(l E c \1 d f? F {3 PATENTEU FEB 9L9?! 3,561, 805
" snmenra ALBERT SHAW 8) PATENTEUFEB. 91971 3.561.805
SHEET 3 [1F 3 DOOR LOCKS AND HANDLES THEREFOR This invention relates to improvements in door locks and handles therefore and is particularly applicable for use on caravans and other doors where a handle substantially flush with the outer surface of the door is required.
The object of the invention is the provision of a rotary or pushbutton-type handle which operates a rack to move the latch or bolt, the movement of the pushbutton being less than the movement of the latch or bolt.
According to the invention a spring-loaded rotary pushbutton barrel is mounted to move transversely of the door to engage a sliding rack engaging a pinion mounted on a spindle. rotation of the spindle causing a second pinion thereon to actuate a rack on the latch or bolt, a peg on the barrel being mounted eccentrically of the sliding rack whereby on rotation of a key the peg on the barrel is brought out of engagement with the sliding rack to prevent actuation of the latch or bolt.
The invention will be described with reference to the accompanying drawings:
FIG. 1 is a part elevation of a door with the lock in position thereon viewed from the outside of the door;
FIG. 2 is an elevation of same from the inside of the door;
FIG. 3 is an end view of a door with the lock in position thereon;
FIG. 4 is a transverse section through the door and lock;
FIG. 5 is a section at right angles to FIG. 4;
FIG. 6 is a detailed section on line 6-6 FIG. 2;
FIG. 7 is a plan view of the latch bolt; and
FIG. 8 is a plan of the inside casing from the underside with the base plate removed.
A door lock is formed in two parts, A the part A being mounted on the inside of the door C and operated by a rotary handle a and the part A being mounted on the outside of the door C and operated by a key inserted in a pushbutton barrel F.
A latch bolt B slides longitudinally of the casing A. The bolt B (FIG. 7) is formed with a nose to engage a recess in the door post C and with rack teeth b on both sides of a central recess b' and with lugs b at the end remote from the nose. The bolt B is also provided with longitudinal side flanges b engaging slides a on the casing A. Casing A has further slides a engaged by the faces of the lugs b The bolt is urged toward the position shown in FIG. 4 by a spring a mounted on a pin a having its head seated in a recess a in the casing with the opposite end of the spring extending into a recess b" in the end of the bolt remote from the nose.
The bolt B is released against the spring a by rotation of a spindle (FIG. 5) on which are keyed pinions d engaging the rack teeth b on the bolt. A further pinion d of less diameter than the pinions d is also keyed on the spindle and is engaged by rack teeth d on a flanged slide D mounted between guides 11 on the casing A. Slide D moves at right angles to the direction of movement of latch bolt B, passing through opening b of the latch bolt.
The bolt B is operated by the rotary handle a passing through the casing A and mounted on a spindle a carrying a quadrant-shaped lever a the ends of which engage the lugs b on the bolt. The bolt may be locked in the withdrawn position by a catch d sliding transversely of the casing A to engage a stop b on the bolt B. The bolt is held in position in the casing by a base plate a l.
The part A of the lock in the form of a plate for the outside of the door A barrel F is rotatable in a housing a rotated by a key inserted in the barrel and operated as a pushbutton latch against the action of a spring f mounted in a recess in the easing A. The central part of the inner end of the barrel F is constructed with an eccentric peg f extending through a hole or aperture in the casing A. The housing of barrel F is mounted in a finger plate f secured to the casing A by a screw 1. The casing A lies substantially flushed with outer surface of the door C with a recessf formed in the casing beneath the finger grip f which is employed for opening the door when a latch B is released.
The eccentric peg f in one rotated pos|t|on on the lock barrel F engages the head of a screw 11" or like adjustable member projecting from the end of the rack slide D whereby when the barrel F is moved inwards against the springfpegj abuts screw d and displaces the rack D to rotate the pinion d. The resulting counterclockwise (FIG. 4) movement of the pinion d rotates the pinions d in engagement with the rack teeth b on the bolt B thereby withdrawing the bolt into the easing A to release the door.
When the key is turned to rotate the central end part of barrel F, the peg j is brought out of line withthe head of the screw d and the rack slide D is not operated on depression of the barrel F and the bolt B cannot be withdrawn to release the door.
The casings A, A are secured in position on the door by screws A extending from the part A and into the Part A.
In order to accommodate the unit to doors C of varying thickness the rack D is provided with the adjusting screw J to determine the position at which the rack D is engaged by the P sfl In operation the pushbutton barrel F is depressed to operate the latch bolt 8 through the racks and pinions and is returned to the normal position by the spring f. By rotating the central barrel part by the key. the barrel is rotated to bring the peg f out of engagement with the screw (1 thereby preventing pushbutton actuation thereof.
I claim:
I. A door lock assembly of the type adapted to be used on doors where an outside handle is substantially flush with the other surface of the door, comprising casing means secured in an opening in the door. a latch bolt slidably mounted in said casing means and having a latching portion for projecting out of one end of the casing, a first resilient means biasing said latch bolt toward latched position, a pushbutton operator slidably mounted in the outer sidewall of the casing for movement in a direction at right angles to movement of the latch bolt, a second resilient means biasing said pushbutton operator outwardly toward retracted position, a slide member in said casing means mounted for movement parallel to said pushbutton operator. an eccentric internal projection on said pushbutton operator rotatable about an axis parallel to the direction of movement of said pushbutton operator, abutment means on said slide member adapted to be engaged by said projection during inward displacement of said pushbutton operator only in a predetermined rotate position of said projection, motion transmitting mechanism within the casing means interposed between said slide member and said latch bolt for translating inward displacement of said slide member by said pushbutton operator into amplified latch bolt retraction movement, and means extending through the inner side of said casing adapted to retract said latch bolt independently of operation of said button operator, said abutment means comprising a projection on said slide that is adjustable toward and away from the projection on said pushbutton to accommodate said assembly to doors of different thickness.
2. In the door lock assembly defined in claim 1, key operated means operable only from the outside of the door for rotating said projection.
3. In the door lock assembly defined in claim 1, means operable from the inner side of said casing means for locking said latch bolt in unlatching position.
4. In the door lock assembly defined in claim 1, said motion transmitting mechanism comprising rack and pinion means providing amplified displacement of said latch bolt upon a given displacement of said pushbutton operator.
5. In the door lock assembly defined in claim I, said casing means comprising an outer casing member mounting said pushbutton operator and an inner casing member mounting said latch bolt, and means rigidly connecting said casing members together and to the door at said opening.

Claims (5)

1. A door lock assembly of the type adapted to be used on doors where an outside handle is substantially flush with the other surface of the door, comprising casing means secured in an opening in the door, a latch bolt slidably mounted in said casing means and having a latching portion for projecting out of one end of the casing, a first resilient means biasing said latch bolt toward latched position, a pushbutton operator slidably mounted in the outer sidewall of the casing for movement in a direction at right angles to movement of the latch bolt, a second resilient means biasing said pushbutton operator outwardly toward retracted position, a slide member in said casing means mounted for movement parallel to said pushbutton operator, an eccentric internal projection on said pushbutton operator rotatable about an axis parallel to the direction of movement of said pushbutton operator, abutment means on said slide member adapted to be engaged by said projection during inward displacement of said pushbutton operator only in a predetermined rotate position of said projection, motion transmitting mechanism within the casing means inTerposed between said slide member and said latch bolt for translating inward displacement of said slide member by said pushbutton operator into amplified latch bolt retraction movement, and means extending through the inner side of said casing adapted to retract said latch bolt independently of operation of said button operator, said abutment means comprising a projection on said slide that is adjustable toward and away from the projection on said pushbutton to accommodate said assembly to doors of different thickness.
2. In the door lock assembly defined in claim 1, key operated means operable only from the outside of the door for rotating said projection.
3. In the door lock assembly defined in claim 1, means operable from the inner side of said casing means for locking said latch bolt in unlatching position.
4. In the door lock assembly defined in claim 1, said motion transmitting mechanism comprising rack and pinion means providing amplified displacement of said latch bolt upon a given displacement of said pushbutton operator.
5. In the door lock assembly defined in claim 1, said casing means comprising an outer casing member mounting said pushbutton operator and an inner casing member mounting said latch bolt, and means rigidly connecting said casing members together and to the door at said opening.
US715252A 1967-04-22 1968-03-22 Door locks and handles therefor Expired - Lifetime US3561805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18656/67A GB1161167A (en) 1967-04-22 1967-04-22 Improvements in Door Locks.

Publications (1)

Publication Number Publication Date
US3561805A true US3561805A (en) 1971-02-09

Family

ID=10116203

Family Applications (1)

Application Number Title Priority Date Filing Date
US715252A Expired - Lifetime US3561805A (en) 1967-04-22 1968-03-22 Door locks and handles therefor

Country Status (2)

Country Link
US (1) US3561805A (en)
GB (1) GB1161167A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163375A (en) * 1978-01-16 1979-08-07 Vsi Corporation Right angle lock
DE3345488A1 (en) * 1982-12-15 1984-06-20 General Motors Corp., Detroit, Mich. DOOR HANDLE ARRANGEMENT
US4813723A (en) * 1985-02-05 1989-03-21 Titon Hardware Limited Latch operating means
US5060991A (en) * 1989-10-20 1991-10-29 Emhart Inc. Door latch assembly with rack and pinion actuating members
US5072977A (en) * 1991-07-29 1991-12-17 Trans-Atlantic Company Paddle latch device
US6116662A (en) * 1999-03-02 2000-09-12 Johnson; Muriel Flush mounted latch for a door
US6779819B2 (en) * 1993-11-01 2004-08-24 Yale Security Inc. Exit device having press bar-operated elongated securing member
DE102005009275A1 (en) * 2005-02-25 2006-08-31 Strasser, Peter Door closer for two-way doors and windows has drive rod diverting actuating force which is solely in opening or closing direction ninety degrees to output rod coupled to latch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1195881A (en) * 1916-08-22 Latch
US1211437A (en) * 1915-11-24 1917-01-09 Archibald B Gruber Door-latch.
US1770917A (en) * 1927-10-12 1930-07-22 Hall Bicknell Latch for automobile doors
US2279591A (en) * 1939-08-10 1942-04-14 Yale & Towne Mfg Co Night latch
US2322892A (en) * 1940-08-29 1943-06-29 Ray W Springer Door lock mechanism
US2636376A (en) * 1948-01-06 1953-04-28 American Hardware Corp Lock

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1195881A (en) * 1916-08-22 Latch
US1211437A (en) * 1915-11-24 1917-01-09 Archibald B Gruber Door-latch.
US1770917A (en) * 1927-10-12 1930-07-22 Hall Bicknell Latch for automobile doors
US2279591A (en) * 1939-08-10 1942-04-14 Yale & Towne Mfg Co Night latch
US2322892A (en) * 1940-08-29 1943-06-29 Ray W Springer Door lock mechanism
US2636376A (en) * 1948-01-06 1953-04-28 American Hardware Corp Lock

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163375A (en) * 1978-01-16 1979-08-07 Vsi Corporation Right angle lock
DE3345488A1 (en) * 1982-12-15 1984-06-20 General Motors Corp., Detroit, Mich. DOOR HANDLE ARRANGEMENT
US4813723A (en) * 1985-02-05 1989-03-21 Titon Hardware Limited Latch operating means
US5060991A (en) * 1989-10-20 1991-10-29 Emhart Inc. Door latch assembly with rack and pinion actuating members
US5072977A (en) * 1991-07-29 1991-12-17 Trans-Atlantic Company Paddle latch device
US6779819B2 (en) * 1993-11-01 2004-08-24 Yale Security Inc. Exit device having press bar-operated elongated securing member
US6116662A (en) * 1999-03-02 2000-09-12 Johnson; Muriel Flush mounted latch for a door
DE102005009275A1 (en) * 2005-02-25 2006-08-31 Strasser, Peter Door closer for two-way doors and windows has drive rod diverting actuating force which is solely in opening or closing direction ninety degrees to output rod coupled to latch
EP1703050A1 (en) 2005-02-25 2006-09-20 Peter Strasser Locking device

Also Published As

Publication number Publication date
GB1161167A (en) 1969-08-13

Similar Documents

Publication Publication Date Title
US4438964A (en) Paddle operated vehicle latch
US4118056A (en) Mortise lock
US3750433A (en) Mortise lock retract mechanism
US6851287B1 (en) Lock having a quick unlocking function
US3751949A (en) Locking device
US2468644A (en) Lock mechanism
US6793254B1 (en) Automatic door latch
US3561805A (en) Door locks and handles therefor
KR890001456Y1 (en) Handle device for doors
US2230096A (en) Door latch
US2264239A (en) Door lock
US2743600A (en) Tubular lock
US3411330A (en) Combined latch and lock structure
US3129579A (en) Latchbolt holdback for doorlocks
US3590609A (en) Latch structure
US2800347A (en) Door locks
US3368375A (en) Removable core with indicator pin
ES336122A1 (en) Locks
US4294089A (en) Latchbolt rim lock
US3147608A (en) Door latch and locking means
US3477260A (en) Emergency exit lock
US3047323A (en) Door lock
US3128112A (en) Privacy lock set
GB1210831A (en) Improvements relating to door lock and latch assemblies
US2676829A (en) Lock