US2542130A - Lock set for doors - Google Patents

Lock set for doors Download PDF

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Publication number
US2542130A
US2542130A US755062A US75506247A US2542130A US 2542130 A US2542130 A US 2542130A US 755062 A US755062 A US 755062A US 75506247 A US75506247 A US 75506247A US 2542130 A US2542130 A US 2542130A
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Prior art keywords
locking member
lock set
door
bolt
door lock
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Expired - Lifetime
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US755062A
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Carl F Friend
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Carl F Friend
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    • 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
    • E05C1/14Fastening 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
    • 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
    • Y10T292/0976Sliding cam
    • 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
    • Y10T292/0995Push or pull rod
    • 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
    • Y10T292/1014Operating means
    • Y10T292/1022Rigid
    • Y10T292/1031Swinging catch
    • 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
    • Y10T292/62Bolt casings

Description

Feb. 20, 1951 c. F. FRIEND v 2,542,130

Loox SET FOR DooRs Filed June 17, 1947 5y im. w.

Patented Feb. 20, 1951 UNITED STATES PATENT OFFICE LOCK SET FOR DOORS Carl F. Friend, Burbank, Calif.

Application June 17, 1947, Serial No. 755,062

9 Claims. l

My invention relates in general to lock sets for doors, or the like, and, more particularly, to a door lock set which embodies various improvements on the structure disclosed in my co-pending application entitled Door Lock Set, Serial No. 592,547, filed May 8, 1945, now Patent No. 2,485,042, issued October 18, 1949, reference to which is hereby made.

For convenience in disclosing the invention, I prefer to consideran embodiment thereof which is adapted to be positioned in a notch in an edge of a door, such a construction being particularly advantageous in that the relatively complex mortising operations required when installing the usual door lock set are eliminated. However, various features of my invention may be inco-rporated in other embodiments thereof and it will be understood that I do not desire to be limited to the specic embodiment which is considered herein for purposes of illustration.

A primary object of my invention is to provide a door lock set which is adjustable to permit installation thereof on doors o f various thicknesses without any structural modifications. I prefer to attain this object of my invention by providing a door lock set having a pair of complementary frame or housing sections which may be spaced apart a variable distance, and having means for adjustably connecting the housing sections together in a manner to permit varying the spacing therebetween.

Another object of the invention is to provide a door lock set of the foregoing nature wherein the housing sections are provided with anges thereon which engage opposite surfaces of a door adjacent the periphery of a notch in an edge thereof, the adjustability of the housing of the door lock set permitting variations in the spacing between the flanges so that the housing may be positioned in notches in doors of Various thicknesses.

An important object of my invention is to provide a door lock set which incorporates a novel locking means for preventing retracting of a slidable latch bolt forming part of the device. A related object is to provide locking means which includes a locking member that is rotatable between operative and inoperative positions about an axis which extends transversely of the direction of movement of the latch bolt, the locking member, when in its operative position, being engageable with an end of the latch bolt to prevent retraction thereof. Still another object in this connection is to provide a latch bolt provided with arms at one end. thereof which are adapted to receive a constricted portion of the locking member therebetween when the locking member is in its inoperative position so as to permit retraction of the bolt.

Another important object of my invention is to provide a door lock set of the foregoing character which includes yieldable means tending to resist rotation of the locking member for releasably retaining the locking member in either its operative position or its inoperative position. The yieldable means thus provides a positive feel for the operative and inoperative positions of the locking member, which is an important advantage of my invention.

Further objects of my invention include the provision of a door lock set which permits unlatching the door merely by pushing or pulling suitable handles in the direction of motion to be imparted to the door in opening it, which is provided with handles designed to safeguard the hands and clothing of persons using thel device, which may be installed readily, which may be installed in either an upright position or in an inverted position without structural modifications, and which provides an attractive appearance.

The foregoing objects and advantages of my invention, together with various others which will be evident hereinafter, may be realized by means of the exemplary embodiment which is shown in the accompanying drawing and which is described in detail hereinafter. Referring to the drawing:

Fig. 1 is a side elevational view of a door lock set which embodies the fundamental principles of my invention and which is shown installed in a notch in an edge of a door, parts of the door lock set being shown in section and parts thereof being broken away to reveal the internal structure thereof;

Fig. 2 is a front elevational view of the door lock set;

Figs. 3 and 4 are longitudinal sectional views which are taken along the broken line 3-3 of Fig. 1 and which show the door lock set in its latched and unlatched positions, respectively;

Fig. 5 is a transverse sectional view which is taken along the broken line 5-5 of Fig. 3;

Fig. 6 is an enlarged, fragmentary sectional view which is taken along tin-.broken une e-t of Fig. 4;

Fig. 7 is an enlarged, fragmentary side elevational vieW which is taken in the direction indicated by the arrows intersecting the broken line 1-1 of Fig. 4; and

Fig. 8 is an enlarged, fragmentary sectional view which is taken along the broken line 3 8 of Fig. 4.

In the particular construction illustrated in the drawing, my door lock set, indicated generally by the numeral i, is positioned in a cut-out or notch II which extends rearwardly from the forward edge i2 of a door I3, the forward edge of the door being disposed adjacent a door lamb I4 in the usual manner when the door is closed. The door jamb is provided with a recess I therein for a latch plate IE which may be attached to the door jamb by screws, or the like, the latch plate being provided with a recess I1 for the forward end of a latch bolt which forms part of the door lock set IG as will be discussed in more detail hereinafter.

The door lock set I0 includes a frame or housing which is formed in two complementary sections 2l and 22 as best shown in Fig. 5. The housing sections 2l and 22 are provided with transversely spaced peripheral iianges 23 and 24, respectively, which engage opposite sides of the door I3 adjacent the periphery of the notch II therein. As best shown in Fig. 5, the transverse spacing between the housing sections 2i and 22, and, consequently, the transverse spacing between the flanges 23 and 24, may be varied to permit positioning the housing 2D in notches in doors of various thicknesses, the housing sections being adjustably connected by means of screws 25 in the particular construction illustrated to permit such variations Vin the transverse spacing of the housing sections. As best show-n in Figs. 1 and 2, the housing sections 21| and 22 are provided with inwardly extending tapered projections-or cleats 21S which are adapted to penetrate the wood or other material forming the door I3 to secure the vdoor lock set I3 to the doer when the screws "25 yare tightened.

As best shown in Fig. 5, the housing -section 2| is provided with a rectangular, longitudinally extending passage -which serves as a guide 28 for a latch bolt 29, the bolt being slidable longitudinallyof the guide between extended and retracted positions as shown in Figs. 3 and 4, respectively. The vlatch bolt 29 is provided with a tapered head '30 at its forward end which is insertable into the -recess i1 in the latch -plate IS when the bolt is in its extended position., the -bolt normally'being retained in its extended position by aspring VV3I which is disposed between spaced arms 32 of the bolt, and the forward end of which is seated against the head 3Q,

The latch bolt 29 may be retracted by means of a transversely movable actuating ymember or link 34 against which the rearward end of the spring 3lv -is seated and which extends through openings 35 -in the guide 23 and between vthe arms 32 of the bolt 29. The link 34-is Vprovided with an inclined cam surface 31 thereon which is preferably formed by one side of a generally V-shaped notch in the link, and which engages a roller 38 forming part of `the latch bolt to retract the bolt when the link is moved in the direction of the transverse arrows 33 of Fig. 4, the roller being disposed between the arms 32 of the bolt, as best shown in Fig, 8.

The door lock set IEE includes handles 4I and 42 which are pivotally connected to the housing Sections 2l and 22, respectively, by pins 43 and 44, the handles extending into recesses 45 and 4S in the respective housing sections. The handles 4I and 42 are also pivotally connected to the link 34 at transverselyspaced-points by pins 41 and 48, respectively, whereby movement of either handle in the direction of the arrows 39 results in transverse movement of the link to retract the latch bolt 29 in the manner previously described. The link 34 is provided with a plurality of holes 49 therein for the pivot pin 48 to permit varying the spacing between the pivot pins 41 and 48 in correspondence with variations in the transverse spacing between the housing sections 2l and 22 to permit installing the door lock set on doors of various thicknesses without any structural modications. If the door lock set is to be installed on a door of exceptional thickness, a link 34 of greater length than the one shown in the drawing may be employed.

In the particular construction illustrated in the drawing, the door lock set I0 is intended to be used on a door which opens in the direction indicated by the arrows 39, e. g., on a door which opens inwardly, so that the door may be opened by pulling inwardly on the handle 4I or by pushing inwardly on the handle 42 to move the link 34 transversely so as to retract the latch bolt 23. It will be noted that the force applied to the handle 4I, or to the handle 42, to retract the latch ibolt 23 is thus in the direction of motion to be imparted to the door, which is an important feature of the invention.

Since, in the particular construction shown in the drawing, the door lock set l0 is intended for use on `doors which open in the direction indicated by the arrows 39, only the cam surface 31 on the link 34 is necessary, this cam surface preferably being provided by one side of a generally il-shaped notch in the link as previously discussed. The opposite side 52 of this notch is preferably inclined with respect to the direction of movement of the latch bolt 29 to an extent insufcient to cause retraction of the latch bolt if push or pull forces are applied to the handles 4I or 42, respectively, in directions opposite to that indicated by the .transverse arrows 33. However, if the door lock set I0 is to be used on doors which may .open ineither direction, the link 34 can be made to retract the latch bolt 29 upon transverse movement of the link in either direction by making the generally V-shapednotch in the link symmetrical so that the side -52 of the notch serves as acam surface which is similar but opposite to the cam surface 31. It will be noted that the reversible door lock set I0 is so that if it is `to be used on a door which opens in the direction indicated by the transverse arrow 40 in Fig. 4, e. g., on `a door which opens outwardly, it is merely necessary to invert the door lock set with respect -to the position shown in the drawings without any structural lmodifications, which is an important feature of Athe invention. In other words, by mounting the entire lock set I0 in the notch I I Vin an inverted position, push and pull forces may be applied to the handles 42 and 4I, respectively, in the direction indicated rby the arrow '4U-to retract the bolt 29 and openthe door. Moreover, the door lock setis so constructed that the foregoing end may -also be attained by interchanging the handles `4I and 42 and reversing the link 34, -i-. e., inverting the link and turning, it end-for-end. Reversing the operation of the lockset-in the latter manner avoids changing the positionof a locking means 50 associated therewith, which yis another vfeature of the invention.

In order to safeguard the hands of persons operating Y'the door lock set i0, the handles 4I and 42gareprovided with recesses 5,3 and 54, re-

spectively,-for the operators'ngertips at PQillts removed from the forward edge I2 'of the door I3 so that it is virtually impossible for the operators fingers to be caught between the door and the door jamb I. The handles 4I and 42 are also provided with smooth, rounded contours to safeguard the hands and clothing of persons operating the door lock set lil, the handles preferably being provided with substantially S-shaped outer surfaces as shown in Figs. 3 and 4.

The previously mentioned locking means 56 prevents retraction of the latch bolt 29 when the door I3 is locked and is preferably operable by a handle 51 located on the side of the door toward which the door is moved when being opened, e. g., on the inner side of the door. As |best shown in Figs. 3 and 4, the locking means 56 includes a locking member 58 to which the handle 51 is connected and which is journalled in openings 5d and 6E! in the housing section 2l carrying the latch bolt the locking member 58 being rotatable about a transverse axis which is substantially aligned with the guide 28 and which is spaced from the rearward end thereof.

The locking member t8 is provided with a constricted portion 6I which is preferably of a generally rectangular cross section as shown in Fig. 8, the locking member being rotatable between an operative position wherein the constricted portion 6I thereof is oriented transversely of the direction of movement of the latch bolt 29, as indicated in dotted lines in Fig. 8, and an inoperative position wherein the constricted portion is oriented parallel to the direction of movement of the latch bolt, as shown in solid lines in Fig. 8. The width of the constricted portion el, as indicated by the dimension 64, is such that the constricted portion is engageable with the rearwardly extending arms 32 of the latch bolt to prevent retraction of the bolt Ywhen the locking member "53 is in its operative position, and the thickness of the constricted portion, as indicated by the dimension d5, is such that the constricted portion is receivable between the arms of the latch bolt to permit retraction of the bolt when the locking member is in its inoperative position. Thus, when the locking member 58 is rotated into its inoperative position, the arms 32 of the latch bolt 29 span the constricted portion 6i of the locking member to permit retraction of the latch bolt, and when the locking member is rotated into its operative position, the arms 32 engage the constricted portion to prevent retraction of the bolt.

I prefer to provide the door lock set IU with yieldable means 'I which tends to resist rotation of the locking member 58 for the purpose of releasably retaining the locking member in either its operative position or its inoperative position and for the purpose of providing a positive feel for these positions.

The yieldable means 6? preferably comprises a bowed leaf s ring 68 the ends of which are seated against a wall te of the housing section 2| and the central portion of which engages a substantially square shank portion l'il of the locking member 58, the shank portion having peripherally spaced, generally plane surfaces 'Il and 'I2 which engage the central portion of the spring and which correspond to the operative and inoperative positions, respectively, of the locking member. It will be apparent that as the locking member 58 is rotated between its operative and inoperative positions, the corner 73 of the shank portion le between the surfaces il Iand 'I2 thereof depresses the central portion of the bowed spring 68 to resist rotation of the locking member whereby the spring releasably retains the locking member in either its operative position or its inoperative position and provides a positive feel for such positions. The leaf spring 5S also performs another important function in that it is adapted to engage shoulders I4 formed at the ends of the square shank portion I0 of the locking member 58 to prevent withdrawal of the locking member from the openings 5S and Ed therefor.

I prefer to provide the housing section 22 with an opening i5 therein to permit access to the locking member 53 from the side of the door I3 opposite to that on which the handle 5l is located so that the locking member may be moved to its inoperative position in the event of an emergency, the locking member 58 preferably being provided with a notch i6 therein for the reception of the blade of a screw driver, or the like.

Although I have disclosed an exemplary embodiment of my invention herein for illustrative purposes, it will be understood that I do not desire to be limited thereto since various changes, modifications and substitutions may be incorporated in the embodiment disclosed without departing from the spirit of the invention. Accordingly, I hereby reserve the right to all such changes, modiiications and substitutions as properly come within the scope ofthe appended claims.

I claim as my invention:

l. In a lock set for use on doors of various thicknesses, the combination of: a housing comprising a pair of complementary housing sections which are adapted to be spaced apart a variable distance in a transverse direction; means for adjustably connecting said housing sections so as to permit varying the transverse spacing therebetween; a bolt carried by one of said housing sections and movable relative thereto in a longitudinal direction substantially perpendicular to said transverse direction; means including an actuator extending in said transverse direction for moving said bolt in said longitudinal direction; and a pair of handles connected tosaid actuator at points which are spaced apart in said transverse direction, at least one of said handles being adjustably connected to said actuator to permit varying the transverse spacing between said points of connection in correspondence with variations in the transverse spacing between said housing sections.

f 2. An adjustable door lock set, including: a frame comprising a pair of complementary sections which are adap-ted to be spaced apart a variable distance in a transverse direction; means for adj ustably securing said frame sections together so as to permit varying the transverse spacing therebetween; a boit carried by one of said frame sections and movable relative thereto in a longitudinal direction substantially perpendicular to said transverse direction; means including a transversely movable actuating member for moving said boltlongitudinally; and a pair of handles pivotally connected to said frame sections, respectively, said handles being pivotally connected to said actuating member at transversely spaced points, and at least one of said handles being adjustably connected to said actuating member to permit varying the transverse spacing between said points in correspondence with variations in the transverse spacing of said frame sections.

3. In a door lock set, the combination of: a frame; a bolt carried by said frame and movable relative thereto in a longitudinal direction between extended and retracted positions, said belt anarco:

having a pair of spaced, rearwardly extending arms;v a `locking member carried by said frame and rotatable relative thereto. between. operative. and inoperative positions about an axis which extends transversely of said longitudinal. direction, said locking member being receivable. between. said yarms when said locking member is in said inoperative position so as to. permit movement of said bolt into said retracted position, and said locking member providing a pair of circumferentially spaced areas, separated by a section of said locking member, the minimum radial. dis.- tances of said areas from the axis of rotation of said locking member being less than the maximum radial distance of said section of' said. locking member from such axis.; .means on said lockingk member engageable with said bolt for preventing movement of said bolt into said retracted position when said locking member is. in said operative position; and yieldable means adapted to bear against one or the other oi said areas` of said. locking member for resisting rotation of said locking member so as to releasably retain it in either said operative position or said inoperative position.

4. In a door lock set, the combination of a frame provided with a guide; a bolt movable along said guide between extended Iand retractedpositions andi provided with a pair of spaced, rearwardly extending arms; and a locking member rotatable relative to` said frame between operative and inoperative positions about an a-Xis substantially perpendicular to the direction of movement of said bolt, said locking member having a constricted portion which is receivable between said arms of said bolt when said locking member is in said inoperative position so as to permit movement of said bolt into said retracted position, and which is engageable with said arms when said locking member is in said operative position sov as to prevent movement of said bolt into said retracted position.

5. In a door lock set, the combinationof: a frame; a bolt mov-able relative to said frame be tween extended and retracted positions; a locking member provided with a pair of peripherally spaced, generally plane surfaces thereon, said locking member being rotatable relative to said frame between operative and inoperative positions and, when in its operative position, being' engageable with said boltl to prevent movement thereof into said retracted position; and spring means engageable with said surfaces of said locki-ng member when said locking member is in its operative and inoperative positions, respectively, for resisting rotation of saidY lockingv member so as to tend tof retain it in either said operative position or said inoperative position.

6. A door lock set as dened in claim 5 wherein saidl'ocking member is provided with a pair of spaced shoulders respectively located on opposite sides of said spring means and engageable thereby to: retain said locking member with respect to said frame.

75. An adjustable door lock set as dened' in claim 2 including a pin for pivotally connecting said one handle to said actuating member, said actuating member being provided with a pluralityofholes for said pin to permit. varying the transverse spacing between said points.

8. An adjustable door lock set, comprising: a pair: of complementary housing sections adapted to be spaced apart a variable distance in a trans- Verse direction; adjustable means for connecting said housing sections together; a bolt carried by one of said housing sections and movable relative thereto in a longitudinal direction substantiallyy1 normal to said transverse direction; means including a cam device for moving said bolt in said longitudinal direction; and a pair of handles pivotally connected to said cam device at points spaced apart in saidv transverse direction, at least one of said handles being adjustably connected to said cam device to permit varying the transverse spacing between said points of pivotal connection.

9. A lock set as dened in claim 1 wherein each of said housing sections is provided with a plurality of penetrating' elements which face the other of said housing sections, said penetrating elements being adapted to penetrate the material of a door on which said lock set is mounted.

CARL F. FRIEND.

REFERENCES CITED The followingreferences are. of record in the iile: of this patent:

UNITED STATES PATENTS Number Name Date 170,393 Pomeroy Nov, 23, 1975 659,887` Crouch Oct. 16, 1990 830,361 Peck et al. Sept. 41906 1,229,318 Page et al June 12, 1917 2,244,344 North et al. June 3, 1941 2,304,612 Voight Dec. 8, 1942 2,383,574 Voight Aug. 28, 1945

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721092A (en) * 1953-04-17 1955-10-18 Charles J Simmons Door lock
US2764440A (en) * 1954-11-10 1956-09-25 Soss Mfg Company Door latch
US3298094A (en) * 1963-10-28 1967-01-17 Russell Method for preparing a door face to retain a unit lock in position
EP0663502A1 (en) * 1993-12-30 1995-07-19 CAS DI A.A. CAMPI S.p.A. Handle-lock device for either pressure or traction opening of doors
US5551737A (en) * 1995-09-26 1996-09-03 Hartwell Corporation Single-point self-closing latch
US5683123A (en) * 1995-04-19 1997-11-04 Ruoss; Peter A. Security grill system
WO2013181688A1 (en) 2012-06-05 2013-12-12 Ashley Dean Olsson Slam latch
AU2014277838B2 (en) * 2012-06-05 2017-03-16 Ashley Dean Olsson Latch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US170393A (en) * 1875-11-23 Improvement in reversible latches
US659887A (en) * 1900-06-15 1900-10-16 Walter A Crouch Knob-latch.
US830361A (en) * 1905-09-02 1906-09-04 Louis C Peck Door-latch.
US1229318A (en) * 1911-09-27 1917-06-12 Sargent & Co Lock.
US2244344A (en) * 1940-07-22 1941-06-03 Nat Lock Co Latch
US2304612A (en) * 1938-07-07 1942-12-08 Sargent & Co Lock
US2383574A (en) * 1943-11-17 1945-08-28 Sargent & Co Latch for hospital doors and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US170393A (en) * 1875-11-23 Improvement in reversible latches
US659887A (en) * 1900-06-15 1900-10-16 Walter A Crouch Knob-latch.
US830361A (en) * 1905-09-02 1906-09-04 Louis C Peck Door-latch.
US1229318A (en) * 1911-09-27 1917-06-12 Sargent & Co Lock.
US2304612A (en) * 1938-07-07 1942-12-08 Sargent & Co Lock
US2244344A (en) * 1940-07-22 1941-06-03 Nat Lock Co Latch
US2383574A (en) * 1943-11-17 1945-08-28 Sargent & Co Latch for hospital doors and the like

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721092A (en) * 1953-04-17 1955-10-18 Charles J Simmons Door lock
US2764440A (en) * 1954-11-10 1956-09-25 Soss Mfg Company Door latch
US3298094A (en) * 1963-10-28 1967-01-17 Russell Method for preparing a door face to retain a unit lock in position
EP0663502A1 (en) * 1993-12-30 1995-07-19 CAS DI A.A. CAMPI S.p.A. Handle-lock device for either pressure or traction opening of doors
US5460419A (en) * 1993-12-30 1995-10-24 Cas Di A.A. Campi S.P.A. Handle-lock device for either pressure or traction opening of doors
US5683123A (en) * 1995-04-19 1997-11-04 Ruoss; Peter A. Security grill system
US5551737A (en) * 1995-09-26 1996-09-03 Hartwell Corporation Single-point self-closing latch
WO2013181688A1 (en) 2012-06-05 2013-12-12 Ashley Dean Olsson Slam latch
EP2855808A4 (en) * 2012-06-05 2015-12-23 Ashley Dean Olsson Slam latch
AU2014277838B2 (en) * 2012-06-05 2017-03-16 Ashley Dean Olsson Latch
US9758996B2 (en) 2012-06-05 2017-09-12 Ashley Dean Olsson Latch

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