US3206954A - Lockable door latch - Google Patents

Lockable door latch Download PDF

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Publication number
US3206954A
US3206954A US32116363A US3206954A US 3206954 A US3206954 A US 3206954A US 32116363 A US32116363 A US 32116363A US 3206954 A US3206954 A US 3206954A
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US
United States
Prior art keywords
bar
catch
door
casing
latch bolt
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
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English (en)
Inventor
Snyman Mattheus Johannes
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.)
PRES PUL LOCK CO Ltd
Original Assignee
PRES PUL LOCK 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 PRES PUL LOCK CO Ltd filed Critical PRES PUL LOCK CO Ltd
Application granted granted Critical
Publication of US3206954A publication Critical patent/US3206954A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/22—Locks or fastenings with special structural characteristics operated by a pulling or pushing action perpendicular to the front plate, i.e. by pulling or pushing the wing itself
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C1/00—Fastening devices with bolts moving rectilinearly
    • E05C1/08—Fastening devices with bolts moving rectilinearly with latching action
    • E05C1/12—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C1/14—Fastening devices with bolts moving rectilinearly with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the handle or member moving essentially towards or away from the plane of the wing or frame
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/0876—Double acting
    • Y10T292/0877—Sliding and swinging
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/0876—Double acting
    • Y10T292/0878—Sliding
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/0969—Spring projected
    • Y10T292/097—Operating means
    • Y10T292/0995—Push or pull rod
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/1014—Operating means
    • Y10T292/1022—Rigid
    • Y10T292/1028—Sliding catch
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5093—For closures
    • Y10T70/5155—Door
    • Y10T70/5199—Swinging door
    • Y10T70/5372—Locking latch bolts, biased
    • Y10T70/5385—Spring projected
    • Y10T70/5389—Manually operable
    • Y10T70/55—Dogged bolt or connections

Definitions

  • This invention relates to improved door latches and door locks of the thrust-operated kind requiring a thrust or pull upon the knob spindle or shaft for retraction of the bolt to permit the opening of the door in the direction of the force applied to such spindle or shaft.
  • a door latch includes, a casing adapted for mounting in a door, a latch bolt slidably movable in its longitudinal direction and swingable in a transverse direction within said casing and consisting of a catch rigidly associated with and projecting from one end of a mounting member, resilient means biassing the latch bolt in one longitudinal direction with the catch extending through one end of the casing, stop means on the latch bolt limiting the extent of extension of the catch, a manually operated bar axially slidably located transversely through the casing and door and having knob-like members on the ends, stop means limiting the sliding movement of the bar to two alternative positions, resilient means for biassing the bar to one of the alternative positions, a passage across a portion of the bar disposed within the casing, a formation on the mounting member slidingly engagcable along said passage when in alignment therewith for longitudinal catch retracting movement of the latch bolt, a striker adapted for fixing on a door frame member forming a keeper and further adapted for swing
  • the catch is preferably of substantially part elliptical shape when viewed at right angles to the direction of the swing of the door and provides substantially convergingly arranged curved side faces adapted for engaging the striker.
  • the catch mounting member is of a lesser thickness than the maximum thickness of the catch between the curved faces and extends from the thick end of the catch substantially parallel to the centre line of the catch.
  • the latch bolt is biased to that position in which the catch is extended outwardly from one end of the casing and the swinging edge face of the door by a spring.
  • the latch bolt is arranged for swinging in a transverse direction when either of the converging, and preferably curved side faces of the catch is thrust on to a side-face of the striker.
  • the biasing means of the knob or handle mounting bar is by means of a spring adapted to place and normally retain the said bar in that position in which the passage is located in a position to receive the coacting formation of the latch bolt when the latter is swung transversely on closing of the door, due to thrusting the catch on an outwardly directed face of the striker.
  • door latch key operated locking means may also be provided whereby the longitudinal movement of the latch bolt may be blocked or otherwise prevented.
  • the passage associated with the slidable bar may be in the form of a transverse groove or hole whereas the coactin g formation on the end portion of the catch mounting member of the latch bolt may be in the form of a deep notch presenting parallel sides and slidable embracingly over the reduced portion of the bar at the groove or a protrusion capable of sliding through the hole in the bar.
  • the handle or knob mounting bar is preferably of non-circular cross-sectional shape and passes through inline complementarily shaped holes provided in two opposite sides of the lock casing and preferably also through similar holes provided in escutcheon plates fixing on opposite faces of the door.
  • the biasing spring means for the bar is conveniently provided in a space between an escutcheon plate and the latch casing while the biasing spring means of the latch bolt is located internally of the casing.
  • the stop means limiting the longitudinal movement of the latch bolt in the direction of extension of the catch, is conveniently formed by shoulder means engaging a part of the lock casing whereas the stop means for the opposite direction also consist of a shoulder which engages the said handle or knob mounted bar.
  • the latch means according to the invention is readily adaptable for leftor right-handed swinging doors.
  • the striker preferably provides rounded or oblique and convergent faces at the positions of engagement by the catch of the latch bolt.
  • FIGURE 1 is a side view of a door latch and door lock according to the invention and of which the cover plate on one side has been removed;
  • FIG. 2 is a vertical cross-section of the lock on line IIII of FIGURE 1 and shown fitted in a door;
  • FIGURE 3 is a cross-section on line III-III of FIG- URE 2, showing in addition the door frame receiving the swinging edge of the door;
  • FIGURE 4 is a view similar to FIGURE 1 showing a modified form of construction of a door latch and lock according to the invention
  • FIGURE 5 is a vertical cross-section on line V-V of FIGURE 4, showing the latch and lock fitted in a door;
  • FIGURE 6 is a horizontal cross-section on line VI-VI of FIGURE 5, showing also the door frame receiving the swinging edge of the door;
  • FIGURE 7 is a fragmentary side view of a door lock according to the invention and showing a further modified form
  • FIGURE 8 is a cross-section on line VIII-VIII of FIGURE 7.
  • the door locks shown in the drawings are of the mortice lock kind for engagement and fixing in a mortice 1 provided in the swinging edge face of a door 2.
  • the latch and lock is provided with a flat rectangular casing 3 having on one end a fixing plate 4 in which a non circular port is provided which communicates with the interior of the casing 3.
  • One large side face of the casing 3 is a removable cover 5 held in position by screws (not shown), engaging tapped holes 6 provided in the nonremovable side 7 of the casing 3.
  • the latch bolt consists of a catch 8 which is rigidly fixed to a mounting member 9.
  • the mounting member 9 is movably located interiorly of the casing 3 whereas the catch 8 extends outwardly of the casing through the port provided in the fixing plate 4.
  • the catch in plan view, is of substantially convergent shape but preferably provides curved side faces connected by a small radiused end or nosed face 11 and is thus of substantially partelliptical shape.
  • the wide end 12 is symmetrically fixed to an edge of a plate forming the mounting member 9.
  • the plate is substantially thinner than the catch.
  • the latch bolt formed by the catch 8 and the mounting member 9 is slidably movable in the direction of the plane of the mounting member but is normally biassed for the catch 8 to be retained in the maximum extended position from the lock casing 3.
  • a knob-bar 13 is axially slidably and non-rotatably mounted.
  • the bar 13, which is of non-circular shape and preferably of square cross-sectional shape, slidably passes through complementarily shaped holes in the removable and fixed casing sides and 7 and also in escutcheon plates 14.
  • knobs 15 are fixed, preferably in adjustable fashion.
  • the bar 13 is biassed in one of two alternative positions by means of a compression spring 16 placed around the bar 13 and engaging with one end against the inside of an escutcheon plate 14 and with the other end on a part fixed to the bar 13.
  • the biassing means for the catch 8 and its mounting, member 9 consists of a compression spring 17 located in a cavity 18 formed within the plate forming the mounting member 9.
  • One end of the spring 17 engages over a short lug 19 presented within the cavity 18 whereas the opposite end engages a transversely disposed rigid lug 20 attached to or formed from the fixed side 7 of casing 3 and which lug 20 extends into the caivty 18.
  • Said lug 20 in addition forms a stop to limit the extent of movement of the catch 8 and mounting member 9 towards the left and consequently the extent of projection of catch 8 beyond the outer face of plate 4.
  • the end of the mounting member 9, opposite to the end providing the catch 8, is shaped to form a deep longitudinally arranged notch 21 and a tongue-like extension 22.
  • a transverse groove 23 is provided through which the marginal portion 24 of the mounting member 9, on one side of the notch 21, is extendable when such transverse groove 23 is in register with the mounting member 9.
  • the face 25 of the mounting member 9 engages against the face 26, of bar 13 to block the retracting movement of the mounting member 9 and the catch 8.
  • face regions 27 are presented which are slidingly engaged by the curved and convergingly arranged side faces 10 of the catch 8 and on which such catch 8 is capable of forming a rolling or swinging action.
  • the mounting member 9 has a thickness substantially less than the internal width of the lock casing 3 thus allowing for the said member 9 to perform a swinging action in a transverse direction within the catch 8.
  • an inwardly projecting stop 28 is provided which limits the swinging action of the member 9 to a substantially central position within the casing 3 when swung to one alternative position. In the other alternative position of the latch bolt the swinging action is arrested on engagement with the other casing side.
  • the stop member 28, shown in FIGURE 3 is in the form of a small screw engaging in a threaded hole provided in a recessed portion 29 of the casing side.
  • such recess 29, providing a screw-threaded hole is provided in both the removable and non-removable sides 5 and 7 of the lock casing 3 and in either of which the screw 28 may be screwed, depending on the direction of swinging movement required trom the mounting member 9 from its central position within the 4 casing in order to adapt the latch for a door required to swing to the left or to the right.
  • a stop forming projection 30 is provided which is engaged by the spring 16 and adapted to engage a side of lock casing 3 whereby the extent of axial movement of the bar 13, in one direction, is limited. Movement in the opposite direction, against the action of spring 16, is arrested by the spring 16 when fully compressed against the inner face of an escutcheon plate '14.
  • the stop 30 may comprise a pin engaging transversely into or through the bar 13 and from which it projects outwardly.
  • the bar extends through holes 31 provided transversely through the door 2 and intersecting the mortice 1. Said holes 31 are of sizes to provide suflicient space around the bar 13 for the spring 16 and stop 30.
  • a catch receiving keep formation or recess 33 is provided in the door frame 32, providing a rebate 33 for receiving the swinging edge part of the door 2, a catch receiving keep formation or recess 33 is provided and with which a striker plate 34 is associated. 'Ihe striker plate 34, which is tfixed to the door frame member 32,
  • the transverse groove 23 of the bar 13 is disposed adjacent one side of the lock casing.
  • an axially directed movement is applied to the bar 13 to the maxim-um permissible extent whereby the transverse groove 23 is transferred to a substantially central position within the lock casing.
  • Continuance of the application of the axially directed force on the bar '13 causes the catch 8 to be forced against the inner oblique face 36 of the striker plate 34, whereby a wedging action is applied to the catch 8'ca1using longitudinal displacement of the member 9 and by virtue of such member being in alignment with the centrally disposed position of the transverse groove 23, permits the member 9 to be forced along the casing and groove 23 [for retraction of the catch '8.
  • the bar On release of a bar 13, the bar is transferred to its normal position, as is shown in FIGURES 2 and 3.
  • key operated means is provided in a rear region of the casing 3 and which conveniently consists of key operated tumbiers and a key displaceable element 40. In the operative position of element 40, it is disposed between the rear end of the tongue 22 and the casing for blocking the retracting movement of the member 9 and catch 8.
  • the key operated lock means 37 may be of any known kind.
  • the transverse passage or groove 23 is provided in the underside of the bar 13 instead of in the top, as is shown in the form of the invention shown in FIGURES l, 2 and 3, while a shoulder 25 is provided for engaging the bar 13 when the transverse groove 23 of the bar 13 is out of alignment with the member 9.
  • the mounting member 9 is provided on its .front end with shoulder forming regions 39 for abutting against the internal surface of the plate 4.
  • a further modification resides in the provision of a leaf-like spring 17a for resiliently biasing the catch 8 to the extendedposition.
  • Said spring 17a may. comprise a wire-like element anchored by one end to the casing and having the opposite end passing through a cavity formed by an outwardly directed loop-like embossment 41 provided in the mounting member 9a.
  • the leaf spring 17a may be arranged to return and retain the mounting member 9a to and in a substantially central position in the casing 3 and out of alignment with the transverse groove rovided in the bar 13 when the :bar 13 is in either of the alternative positions.
  • the stop 28 is not employed.
  • the limiting of the alternative transversely swung positions is effected by casing sides 5 and 7, which may be provided with embossments for such purpose.
  • FIGURES 4, 5 and 6 also show a modification in respect of the knobs 15, which each provides a flanged sleeve extension 42 slidably engageable over and adjustably fixable to the bar 13, while in respect of one of the knobs 15, the Spring 16 engages flange 43 of such sleeve 42 and the inside of one escutcheon plate 14. With this arrangement the portions of the bar 13, otherwise exposed, are now encased by the sleeves 42, thus enhancing the appearance of the latch and lock.
  • the stop 30 may be in the form of a pin or cotter extending through the bar and providing protrusions beyond two opposite faces of the bar 13.
  • the fixed end of the Wire-like leaf spring 17a is preferably inserted or threaded through a diametrical hole of a pin 44, fixed to the fixed side 7 of the casing 3.
  • the modified features reside in the provision of a transverse hole 47 in the bar 13 instead of the transverse groove 23, while the mounting part 9b is provided with a pin-like end extension 45 capable of extension through said hole 47 when in alignment therewith.
  • the end of the pin-like extension 45 normally engages in a longitudinal groove 46 provided in a face of the bar 13 and from which groove the hole 47 extends.
  • the coacting engagement of the extension 45 in the groove 46 provides guiding and locating means for the catch mounting member 912.
  • the catch mounting member b in this form of construction may consist of a bar providing a transverse hole 48 through which a wire-like leaf spring 17a or the like passes.
  • the spring 17a is also fixed by means of a pin 44 providing a diametrical hole in which the fixing end of the leaf spring 17a is engaged.
  • the stop means in this form of construction, for limiting the extent of projection of the catch 8 may consist of a pin 50 passing through the thick end portion of the catch 8 and projecting beyond the opposite fiat faces to a limited extent for engaging the plate 4 of the lock casing 3.
  • the form of the door latch and lock according to FIG- URES 7 and 8 may be employed when constructing a latch or lock employing a cylindrical casing for engaging a hole bored transversely into the swinging edge face of a door whereas the hole in the door, through which the bar extends, is also a circular hole intersecting the casing receiving hole at right angles.
  • the striker plate 34 shown in FIGURE 6, is of substantially similar construction as that as shown in FIG- URE 3, but provides a flat region 48 between the oblique faces 35 and 36.
  • a door latch including, a casing adapted to be mounted in a door, a striker plate adapted for fixing on 6 a door frame member for the door, a rigid latch bolt slidably movable in its longitudinal direction and swingable between stops in a transverse direction Within the casing and comprising a catch and a catch mounting member, said catch being adapted for retractable extension from one end of the casing for engagement of the striker plate and is of a generally wedge shape presenting convex faces on the convergent sides and of which portions are rollingly and slidably engageable on a pair of spaced internal face regions presented on opposite sides of the casing, a compression spring engaging the casing and the mounting member biassing the latch bolt in one longitudinal direction for the catch to extend through one end of the casing, stop means on the mounting member limiting the extent of projection of the small end of the catch, a manually operated bar guided for slidable movement in its axial direction transversely through the casing and the door and mounting knob-like members on the ends, stop means
  • a door latch including, a casing adapted to be mounted in a door, a catch keeper forming striker plate adapted for fixing on a door frame member for the door, a latch bolt slidably movable in its longitudinal direction and swingable in a transverse direction between stops within said casing and comprising a rigid unit consisting of a catch of substantially wedge shape and a coaxial mounting member for the catch projecting from the wider end of the catch, said mounting member having a deep notch therein, convex curved faces on the converging sides of the catch adapted for sliding and rolling-like engagement on a pair of parallel spaced face regions presented on the insides of two opposed sides of the casing, a spring fixed by one end to the casing and engaging a hole in the mounting member -by a portion on the opposite end region for biasing the latch bolt in one longitudinal direction for extension of the smaller end portion of the catch through one end of the casing and for resiliently retaining the mounting member in a position substantially coaxially within the casing, a manually operated
  • a door latch including, a casing adapted to be mounted in a door, a keeper forming striker plate adapted for fixing in a door frame member in which the swinging edge of the door is received, a latch bolt slidably movable in its longitudinal direction and swingable in a transverse direction between stops within said casing and consisting of a catch rigidly associated with and projecting from one end of a mounting member, a pair of convex faces arranged convergingly on opposite sides of the catch of which the widest region is slidably and rollingly engageable on a pair of inwardly directed and parallel spaced face regions presented by opposite sides of the casing, spring means biassing the latch bolt in one direction with the catch extending through one end of the casing, stop means on the latch bolt limiting the extent of projection of the catch from the casing, a manually operated bar axially slidably and non-rotatably located transversely through the casing and the door and having knob-like members on the ends, escutcheon plates for
  • a door latch including, a casing adapted to be mounted in a door, a keeper adapted for fixing in a door frame in which the swinging edge of the door is received and comprising a striker plate presenting a pair of convergingly arranged oblique faces, a latch'bolt slidably movable in its longitudinal direction and swingable in a transverse direction between stops within said casing and consisting of a wedge shaped catch rigid on and projecting from one end of a mounting member, convex curved side faces on the catch arranged convergingly and presenting rounded faces which when thrust against the oblique faces of the striker plate causes transverse swinging and retraction of the latch bolt by a wedging action while said rounded faces slidably and rollingly engage a pair of parallel spaced internal face regions presented by two opposite sides of the casing, spring means resiliently biassing the latch bolt in one longitudinal direction with the catch extending through one end of the casing, stop means on the latch bolt limiting the extent of projection of
  • a latch for a door comprising a casing, a latch bolt sliding in axial and tilting in transverse directions in said casing and consisting of a squat catch element rigidly attached to a mounting member therefor, a spring held by one end on a part of the casing and engaging by the other end said latch bolt urging the catch element to extend from one side of the casing, a striker plate fixed to a frame for the door and having convergent faces for re tracting displacement of the latch bolt by a wedging action on pressing either side of the catch element against either of the convergent faces, said catch element having a pair of substantially outwardly converging face forming sides which present convex shaped side cheeks slidingly and rollingly engaging at the thickest portion of the catch element spaced internal face portions of two opposite sides of the casing, said mounting member being of smaller thickness than the widest part of the catch element and the internal spacing of the casing sides and extending substantially coaxially from that end of the catch element opposite to the convergent end
  • a latch for a door according to claim 6 in which the catch element of the lat-ch bolt, when viewed in the direction perpendicular to the directions of swing and retraction thereof, is of a shape consisting of the larger portion or an elipse of which one narrow end portion is cut off, and having on a wide fiat edge face the mounting member extending substantially coaxially from the catch element.
  • a latch for a door according to claim 6 in which a stop element is provided, which protrudes transversely into the casing from one side of the casing and adapted to limit transverse swinging of the latch bolt in one direction to a substantially central position within the casing, said stop element being mountable at corresponding positions on either side of the two opposite sides of the casing.
  • a latch for a door in which the biasing means of the latch bolt consists of a compression spring disposed within a longitudinally arranged rectangular cavity in the mounting member of the latch bolt, said spring being mounted by one end on a transverse projection extending inwardly from one side of the casing and by the other end on a transverse edge face of said cavity, said transverse projection forming guide means for the latch bolt and stop means limiting the extent or outward projection of the catch element from the casing on engagement by an opposite transverse edge face of said cavity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lock And Its Accessories (AREA)
US32116363 1962-11-14 1963-11-04 Lockable door latch Expired - Lifetime US3206954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA624792 1962-11-14

Publications (1)

Publication Number Publication Date
US3206954A true US3206954A (en) 1965-09-21

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ID=25560705

Family Applications (1)

Application Number Title Priority Date Filing Date
US32116363 Expired - Lifetime US3206954A (en) 1962-11-14 1963-11-04 Lockable door latch

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US (1) US3206954A (de)
CH (1) CH440019A (de)
ES (1) ES293522A1 (de)
GB (1) GB1047589A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464728A (en) * 1967-07-21 1969-09-02 Alarm Lock Corp Jam resistant door lock
US3561803A (en) * 1967-05-12 1971-02-09 Schlage Lock Co Door pull lock
US3955838A (en) * 1975-03-20 1976-05-11 Charles Dean Door lock
US5216906A (en) * 1989-03-02 1993-06-08 Herman Miller, Inc. Door lock mechanism
US7942457B1 (en) * 2007-04-02 2011-05-17 Donald Bell Lever-handled pocket door latching system
US11220839B2 (en) * 2017-05-15 2022-01-11 Spectrum Brands, Inc. Dead locking latch assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231612A (en) * 1989-05-10 1990-11-21 Lin Pac Mouldings A latch, spring assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1486552A (en) * 1922-11-25 1924-03-11 Frank M Swanson Latch
US1554839A (en) * 1923-11-22 1925-09-22 Brown William Combined knob latch and lock
US1772791A (en) * 1926-07-24 1930-08-12 James M Weaver Lock
US2082195A (en) * 1935-05-03 1937-06-01 Lewis E Williams Lock
US2162031A (en) * 1937-05-08 1939-06-13 Reavill Frederick Spring door lock
US3057649A (en) * 1961-03-07 1962-10-09 Yale & Towne Mfg Co Privacy latch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1486552A (en) * 1922-11-25 1924-03-11 Frank M Swanson Latch
US1554839A (en) * 1923-11-22 1925-09-22 Brown William Combined knob latch and lock
US1772791A (en) * 1926-07-24 1930-08-12 James M Weaver Lock
US2082195A (en) * 1935-05-03 1937-06-01 Lewis E Williams Lock
US2162031A (en) * 1937-05-08 1939-06-13 Reavill Frederick Spring door lock
US3057649A (en) * 1961-03-07 1962-10-09 Yale & Towne Mfg Co Privacy latch

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3561803A (en) * 1967-05-12 1971-02-09 Schlage Lock Co Door pull lock
US3464728A (en) * 1967-07-21 1969-09-02 Alarm Lock Corp Jam resistant door lock
US3955838A (en) * 1975-03-20 1976-05-11 Charles Dean Door lock
US5216906A (en) * 1989-03-02 1993-06-08 Herman Miller, Inc. Door lock mechanism
US7942457B1 (en) * 2007-04-02 2011-05-17 Donald Bell Lever-handled pocket door latching system
US11220839B2 (en) * 2017-05-15 2022-01-11 Spectrum Brands, Inc. Dead locking latch assembly
US11946285B2 (en) 2017-05-15 2024-04-02 Assa Abloy Americas Residential Inc. Dead locking latch assembly

Also Published As

Publication number Publication date
GB1047589A (en) 1966-11-09
ES293522A1 (es) 1964-02-16
CH440019A (de) 1967-07-15

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