US2466993A - Latch - Google Patents

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Publication number
US2466993A
US2466993A US79170947A US2466993A US 2466993 A US2466993 A US 2466993A US 79170947 A US79170947 A US 79170947A US 2466993 A US2466993 A US 2466993A
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US
United States
Prior art keywords
bolt
door
arm
bar
latch
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
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Inventor
Albert F Lickteig
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.)
NATIONAL BRASS CO
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NATIONAL BRASS CO
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Publication date
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Priority to US79170947 priority Critical patent/US2466993A/en
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Publication of US2466993A publication Critical patent/US2466993A/en
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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/16Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C3/162Fastening devices with bolts moving pivotally or rotatively 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 of the plane of the wing or frame
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/124Fastening devices with bolts moving pivotally or rotatively with latching action with latch under compression force between its pivot and the striker
    • 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
    • Y10T292/0876Double acting
    • Y10T292/0883Swinging
    • 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
    • Y10T292/1043Swinging
    • Y10T292/1051Spring projected

Description

A. F. LlCKTElG LATCH Filed Dec. 15} 1947 April 12, 1949.
ALBERT F hex-ram,
ATTORNEYS Patented Apr. 12, 1949 UNITED STATES PATENT OFFICE LATCH Application December 15, 1947, Serial No. 791,709
7 Claims. 1
This invention relates to a latch adapted to be mounted upon a swinging door for releasably holding the door in closed position. It is an object and purpose of the present invention to pro-.
vide a very practical, economically built and easily operated latch for releasably holding a swinging door in closed position, and which is readily installed thereon. Such latch in operation has a bolt assembly releasably cooperating with a keeper therefor against which it strikes when a door is closed and rides thereover to closing position, in association with which is a locking means which normally locks the bolt assembly from disconnection with the strike or keeper when the door is closed. Said locking means is manually movable to release the bolt assembly for disconnection from the strike or keeper. With such structure, the door is closable with a minimum of force applied thereto, but when closed is locked against opening until released through the application to the manually operable locking means of a considerably greater force. Other objects and purposes will appear and be understood from the following description, taken in connection with the accompanying drawing, in which,
Fig. 1 is a horizontal section through a hingedly mounted door and adjacent portions of the door frame or jamb, the latch and keeper being shown in plan,
Fig. 2 is a somewhat enlarged vertical section, substantially on the plane of line 22 of Fig. 1, looking in the direction indicated,
Fig. 3 is a fragmentary horizontal section, substantially on the plane of line 33 of Fig. 2,
Fig. 4 is a section similar to Fig. 3, illustrating a diiierent position of the latch parts when the door is released for opening, and
Fig. 5 is a vertical section through the connection of the handle of the latch with a latch releasing bar pivotally secured thereto.
Like reference characters refer to like parts in the difierent figures of the drawin The door I may be'hingedly mounted adjacent one edge by hinges 2 to swing from open to closed position. At the inner side or edge of the opening which the door closes, a keeper 3, made from a flat plate of metal, is secured by screws or other fasteners. At its inner end portion it is bent laterally at an angle approximating forty-five degrees to provide a terminal section 4 as shown.
In the construction of the latch mounted on the door, and which engages the keeper, a plate 5 is located vertically, in the disclosure shown, at the outer side of the door and a short distance inwardly from its free edge. It has threaded openings for the reception of the threaded ends of screws 6 which pass through openings made therefor through the door, and also through openings in member I disposed at the inner side of the door. They also pass through outwardly extending flanges 8 of a housing, integral with which flanges are upper and lower spaced sides 9 which are integrally connected at one edge by a connecting crosspiece l0. Thus the screws 6 secure not only the plate 5 at the outer side of the door, but the plate I and the housing of the latch.
An arm I l is pivotally mounted on a pivot pin l-2 carried by and extending between the sides 9. It extends inwardly a short distance beyond the two spaced sides 9 and is made from metal in a substantially channel form. Adjacent its free end a bolt member is pivotally mounted. The bolt member consists of two sections I3 and I4 located generally at right angles to each other, the terminal section l4 having a free end coming against one end of a torsion spring l5 conveniently located around the pivot pin [2. The tendency of the spring is to turn the bolt member described in a counterclockwise direction, or until the outer end of the section 13 of said bolt member is stopped by engaging against the outer end of the arm II.
A horizontal bar [6 passes through an opening made through the door I. It is narrowed in width toward its inner end and at such narrow portion passes through a guide opening in the plate I. It is stopped at an inner position by shoulders on the bar [6 (Fig. 2) engaging against short flanges struck from the plate 1 at the opening therethrough. The bar is moved normally to the position described by a coiled compression spring I! around the outer portion of the bar, which bears against projections extending from the bar at one end and against the plate 5 at the other. The bar l6 extends through an opening in the plate 5 and is pivotally connected at its outer end to a handle N3, of the shape and structure best shown in Fig. 2. The handle is recessed at its inner side at its upper end to cover and conceal the plate 5, and has a boss at its inner side carrying a horizontal pivot pin [9 which passes through the bar l6.
At the normal inner position of the bar 46, as in Fig. 2, to which position it is moved by the spring H, the inner end of the bar passes between the part l0 and the adjacent outer side of the arm II, as in Fig. 3. In such position it 5 reaches inwardly beyond the center of the pivot pin I2. When thus located the arm H is held against movement, and the free end of the bolt member having the two sections or parts 13 and H2 is movable a limited distance, being stopped substantially in the position shown in Fig. 3 by the outer end of the part l3 coming against the outer turned-in end portion of arm ll.
When a door is being opened the position of the parts of the latch member carried on the door is that shown in Fig. 4. After the door is opened and the handle is released, the parts of the latch return substantially to the position shown in Fig. 3, the spring I! moving bar l'6 inwardly beyond the axis of the pin 12. On
closure of the door, the elbow or bend between the two parts I3 and M of the bolt will com'e against the inner inclined end .portion of the keeper and the bolt will be turned against the yielding spring 45 until the elbow passes by the free end of the section 4, whereupon spring I5, which has been tensioned by the clockwise movement of the bolt, returns the bolt substantially to the position in Fig. 3, with the end of the part 4 against the curved outer edge of the section M of the bolt. Said curved outer edge is a cam, the radius of curvature of which is greater than the distance between said cam and the center of the pivot mounting the bolt on the arm 1 I. This causes the force of the spring [5 to tend to push the cam edge of the section 14 against the end of the strike 4 and make a snug closure of the door, preventing rattling. In such position the door (Fig. 3) is held against opening. The bolt can not turn about its pivot in a counterclockwise direction beyond the position shown in Fig. 3, and there is no way of reaching said bolt, with the door closed, to turn it in a clockwise direction against the spring I5. Any attempt to open the door will force the bolt against the end of the strike plate section 4, the force being in a line from the center of the pivotof the bolt to the inclined strike section 4 in a direction substantially parallel to the section 4.
To release the door with it closed as in Fig.3, the handle I8 is pulled outward substantially to the dash line position shown in Fig. -2. The outward movement is by the upper end of the handle l8 bearing against the front of the door l. The spring I! is compressed. The outer end of the bar I6 received in a suitable socket therefor at the inner side of the handle 18, in the angular change of relation of the handle to the bar when the handle is pulled outward, limits the distance outward that the-bar may-be pulled by pinching of the bar at its upper or loweredge, or both edges in the socket. And of course, as an equivalent, any suitable stop means may be provided to limit the outward movement of the bar It. For while it is necessary that the bar 16 be moved from one side of the axis of the pivot I2 to the other side thereof, said bar 46 should not be moved to a position that it passes by the adjacent end of the arm H.
In the withdrawn position of the bar, as in "Fig. 4, arm I! is released so that it, with the bolt connected thereto, may move in a counterclockwise direction about the axis of the pin l2. Upon such release of the arm II a continuance of the outward pull upon the handle 18 will-cause a swinging of the bolt assembly from the position in Fig. 3 to or beyond that shownin Fig. 4, the relatively fixed abutment provided by the end'of the strike section '4 causing the automatic turning of the lever H in a counterclockwise'direction'as the door is opened. Such turning of the bolt assembly from the position in Fig. 3 to Fig. 4, accompanied by the opening of the door, moves the outer points of the elbow between the sections l3 and M to a position such that it passes by said strike or keeper section 4 and the door may be fully opened. A pull on the handle will therefore automatically unlatch the door for movement to open position.
The latch structure disclosed is practical and efficient, readily manufactured with economy, its action is exceptionally easy and the latch parts are not subjected to shocks and wear of a damaging or detrimental nature. The latch is particularly durable.
Ease of closure :is a characteristic attribute of the :latch. The strength of the spring !5, which is disposed between the arm II and the pivoted bolt member carried thereby, is light and it is this spring only which has to be tensioned when the door is closed. The strength of the sprin i'! on .the other hand is much greater, and a greater :force isrequired to overcome it to move the locking bar I 6 to its releasing position when thedoor is to be opened. The door therefore is not ilikelyto be accidentally opened, but in general may be opened only upon a direct application of a force which will not occur either aimlessly or by accident, but must be applied .intentionally.
The latch is distinguished from many other types of latches, and so far as known from all others, in that .in such others the latch bolt is usually retracted directly by manual operation, while in the present structure the latch bolt is unlocked so that it may turn, the unlock-ingbeing by manual operation and the turning for release of the bolt from its keeper being thereafter automatic with the-opening of the door.
It is-of course to be understood that variations in structural detail, with an accomplishment of the same purposes and functions in substantially the-same way,.may be resorted to without departing from theinvention. The spring I5 .is conveniently-carried on the pivot :pin .I'Z. And while one end-of it lies against the :arm H, quite .as effective a structure and one operating thesame would be produced-bye spring between the latch bolt having the parts Hand [4 and any convenient place of mounting on one or both of the sides 9 of the fixture described. 'For the ,pin T 2 secured tosaid sides 9 of the fixture, in its functional relationto the-spring '15 maybe considered a part of such fixture. g
It is also-to be understoodlthat-the bolt assembly and its mounting at the inner side of the door, associated with which is a means to normally hold the arm H in the position shown in Fig. 3 when the door is closed, 'is a part of the invention without the-bar J2. 'lnstead as a means for holding the arm in the position .shownin Fig. .3, a spring of heavierforce than the spring -l5 .may be interposed between said arm and the .fixture on which it is mounted, whereupon the .latchds of the friction-catch variety. Therefore, the anvention as defined in the appended claims, .is
to beconsideredcomprehensive .of-all forms of structure =coming within their scope.
I claim: 1. In 'a structure of :the class described, a 'bar adapted to pass through a door, a :handle pivotally connected :at the 20111561 end :of the bar adapted "to bear at one fiend against the :door and having :a manually "-engageable portion at its other end for :pulling the handle 1 outwardly about 'its' point cfzengagement with "the door to move said bar longitudinally outward, spring means acting upon said bar normally tending to move the bar inwardly, a support adapted to be secured to the door at its inner side, an arm pivotally mounted on said support and extending therebeyond, said bar at its inner position lying alongside said arm and extending beyond its pivotal axis, said support having a fixed portion between which and said arm the inner end portion of said bar is received, and a bolt pivotally connected at its outer end to the outer end of said arm extending outwardly and laterally from its pivot and terminating in a section extending toward said bar and located generally at right angles to the outer end portion of the bolt, said bar when pulled outwardly being withdrawn at its inner end beyond the pivotal axis of said arm.
2. A structur as defined in claim 1, and a torsion spring around the pivot of said arm, having one end bearing against the arm and the other against the free end of said bolt.
3. In a latch structure, a support adapted to be attached at the inner side of a door including, spaced apart sides and a cross-connecting portion joining said sides at one edge thereof, an arm pivotally mounted on and between the sides of said support extending at its free end beyond said support, a bolt having two sections located generally at right angles to each other pivotally connected at one end to the outer end portion of the arm, and spring means connected with the pivot of said arm bearing against said arm and the end of the bolt, normally tending to move said bolt away from the pivoted end of the arm, said bolt and arm having interengaging stop means for limiting the extent of pivotal movement of said bolt away from the arm, said crossconnecting portion between the sides of said support being spaced a short distance from the adjacent side of said arm.
4. A structure as defined in claim 3, and a bar slidably mounted between said cross-connecting portion of the support and the adjacent side of the arm, and means for longitudinally moving said bar between two extreme positions, in one of which the arm is held against pivotal movement in a direction toward the bar and in the 6 other of which said arm is free for such pivotal movement.
5. In a structure as described, a latch including a support adapted to be secured at the inner side of a door, a latch bolt, an arm movably mounted on said support on which said bolt is movably mounted, yielding means moving the latch bolt in one direction, interengaging means on the bolt and arm stopping said latch bolt in said direction at a predetermined position, said latch bolt being adapted to be moved against said yielding means upon engagement with and passing by a keeper therefor, and releasable means for holding said arm against movement to thereby maintain the latch bolt in engagement with the keeper until said arm is released.
6. In a structure as described, a support adapted to be secured at the inner side of a door, an arm pivotally mounted thereon adjacent one end of the arm and extending away therefrom, a latch bolt pivotally mounted on said arm adjacent its other end and extending outwardly therefrom and in a direction toward said support and terminating in a part extending inwardly toward said support, interengaging means on the bolt and arm for limiting pivotal movement of the bolt away from said arm beyond a predetermined position, and yielding spring means acting on said bolt tending to move said arm outwardly until stopped by said interengaging means.
7. A structure as defined in claim 6, and means engaging with said arm to resist pivotal movement thereof in a direction away from the bolt.
ALBERT F. LICKTEIG.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 307,281 Farrar Oct. 28', 1884 1,597,524 Gustavson Aug. 24, 1926 1,882,248 Madsen Oct. 11, 1932 2,380,543 Ostrom July 31, 1945
US79170947 1947-12-15 1947-12-15 Latch Expired - Lifetime US2466993A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683052A (en) * 1952-05-29 1954-07-06 Ivan R Lang Locking mechanism
US2709910A (en) * 1952-06-30 1955-06-07 Briggs Mfg Co Deck lid lock
US2862378A (en) * 1956-05-11 1958-12-02 New Castle Products Inc Door latch unit
US4620744A (en) * 1982-08-24 1986-11-04 Nissan Shatai Co. Ltd. Slide door locking device for vehicles during feeding of fuel to a fuel tank positioned near a slide door
US20180100286A1 (en) * 2015-09-17 2018-04-12 Neenah Foundry Company Manhole cover assembly
US10954649B2 (en) 2017-04-19 2021-03-23 Neenah Foundry Company Floating manhole cover assembly
US10968595B2 (en) 2015-09-17 2021-04-06 Neenah Foundry Company Manhole cover assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307281A (en) * 1884-10-28 farrar
US1597524A (en) * 1922-10-09 1926-08-24 Gustavson Johan Arthur Lock
US1882248A (en) * 1931-06-10 1932-10-11 Curtis Companies Inc Door latch
US2380543A (en) * 1943-09-18 1945-07-31 Nat Lock Co Latch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307281A (en) * 1884-10-28 farrar
US1597524A (en) * 1922-10-09 1926-08-24 Gustavson Johan Arthur Lock
US1882248A (en) * 1931-06-10 1932-10-11 Curtis Companies Inc Door latch
US2380543A (en) * 1943-09-18 1945-07-31 Nat Lock Co Latch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683052A (en) * 1952-05-29 1954-07-06 Ivan R Lang Locking mechanism
US2709910A (en) * 1952-06-30 1955-06-07 Briggs Mfg Co Deck lid lock
US2862378A (en) * 1956-05-11 1958-12-02 New Castle Products Inc Door latch unit
US4620744A (en) * 1982-08-24 1986-11-04 Nissan Shatai Co. Ltd. Slide door locking device for vehicles during feeding of fuel to a fuel tank positioned near a slide door
US20180100286A1 (en) * 2015-09-17 2018-04-12 Neenah Foundry Company Manhole cover assembly
US10968595B2 (en) 2015-09-17 2021-04-06 Neenah Foundry Company Manhole cover assembly
US11001982B2 (en) * 2015-09-17 2021-05-11 Neenah Foundry Company Manhole cover assembly
US10954649B2 (en) 2017-04-19 2021-03-23 Neenah Foundry Company Floating manhole cover assembly

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