US2148693A - Latch - Google Patents

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Publication number
US2148693A
US2148693A US34868A US3486835A US2148693A US 2148693 A US2148693 A US 2148693A US 34868 A US34868 A US 34868A US 3486835 A US3486835 A US 3486835A US 2148693 A US2148693 A US 2148693A
Authority
US
United States
Prior art keywords
bolt
door
latch
housing
lever
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
US34868A
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English (en)
Inventor
Reginald Harold Hamilton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2148693A publication Critical patent/US2148693A/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
    • E05B63/18—Locks or fastenings with special structural characteristics with arrangements independent of the locking mechanism for retaining the bolt or latch in the retracted position
    • E05B63/20—Locks or fastenings with special structural characteristics with arrangements independent of the locking mechanism for retaining the bolt or latch in the retracted position released automatically when the wing is closed
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/23—Vehicle door latches
    • 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
    • Y10T292/0971—Cam and lever
    • 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
    • Y10T292/54—Trippers
    • Y10T292/558—Sliding bolt, swinging detent

Definitions

  • This invention relates tolatches for use in retaining doors, windows and the like in the closed condition. l v
  • latchesV for this purpose as hitherto constructed, there has been employed a latch-bolt urged bya spring into a position in which, when the door is closed, it is adapted to engage a catchplate mounted upon the stationary door-frame and from which position such bolt is retractable manually by means of a suitable handle.
  • the bolt has usually been bevelled at the side at which it first meets the catch-plate, or provided with a roller, in order that when the door is slammed or closedk without using the handle, the bolt may be retracted by contact with the catch-plate suiciently to enter the part of the latter with which it is designed to engage, as above mentioned.
  • the invention is such also that it may be applied both in the construction of new latches and also in the conversion of latches of the existing typeserves to retain the latch-bolt in the retracted condition, said lever or member being adapted as vthe door is closed, to ycome in contact with an object mounted upon the stationary door-frame such for instance as a portion of the catch-plate and r by which means the said lever or member is displaced from'its said normal position tol one in which it releases its said retention of the bolt and advances the latter to aposition of engagement Withthe catch-plate.
  • the arrangement is suclralso that the said movement of the lever or member by the object upon the door-frame progresses while the closing of the door continues thereby causing the bolt to be advanced to a greater and greater extent as the door is forced home against the jambs.
  • Fig. 1 shows the latch in side elevation with the vbolt in Vthe'retracted position, the correspending positions assumed by the parts when suchr bolt is advanced being indicated in dotted 1ines, ⁇ and,
  • Fig. 2 illustrates in sectional plan view, a portion of a door such as that of a motor-vehicle fitted with the latch and occupying a partlyopen position, vwhile the corresponding closed condition of such doorl is indicated in dotted lines.
  • l represents a latch-housing of any suitable or appropriate form adapted for mounting upon a door 2 or in a mortice formed in the latter and in which housing is mounted as for instance by means of a guide 3, a sliding bolt 4 which, whenadvanced, protrudesthrouglr an opening 5 in order that such protruding part may engage an abutment such as a catch-plate or keeper 6 mounted upon the frame 1 of the door-Way, thereby to retain the door closed as desired.
  • a sliding bolt 4 which, whenadvanced, protrudesthrouglr an opening 5 in order that such protruding part may engage an abutment such as a catch-plate or keeper 6 mounted upon the frame 1 of the door-Way, thereby to retain the door closed as desired.
  • the power employed in thus advancing the bolt 3 is provided by means of a lever or member 8 pivoted or fulcrumed upon an axis 9 fixed within the housing I, a portion of such lever 8 being arranged to protrude at the exterior of the housing, as through the aforementioned opening 5 and thus come in contact with and be turned by the catch-plate 6 when the door is being closed.
  • a cam II which when turned operates upon the bolt 4 to produce the sliding movement of the latter.
  • the said cam is formed with an operative surface I2, ec-
  • the aforementioned lever or member 8 is provided with an arm I4 connected, preferably by a spring I5, with a lever I6 fulcrumed as at Il to the housing I, while the said lever I8 is in turn connected, by means of a link or connecting-rod I8 with a suitable point I9- upon the cam I I eccentric to the pivotal axis I0 of the latter.
  • the said protruding end of the bolt 4 at the side thereof which co-operates with the catch-plate in retaining the door closed is sloped at a suitable angle, to present to the catch-plate a wedge surface as 28 adapted as the result of the above mentioned progressive advance of the bolt, to force the door more and more firmly against the lambs.
  • resilient means are introduced into the said operative connection between the lever 8 and the bolt 4 in order to provide a slight tolerance in the operation to compensate for any small inaccuracies such as are liable to occur in the manufacture of the latch or in fitting the same to the door.
  • this resilience is provided by making the ⁇ connection I in the form of a spring in which, during the movement of the lever 8, power may be stored up to be utilized in advancing the bolt and keeping the same in live engagement with the catchplate. k
  • This provision also serves to protect the parts from injury in the eventr of the latch being incorrectly operated or deliberately abused, as for instance in the event of the door being closed while the bolt 4 is held in the retracted position by the manually operable retracting means hereinafter described.
  • the latch-bolt will preferably be arranged to continue its advancing movement until arrested by friction 'occasioned by pressure of its sloping surface with the co-operating surface of the catch-plate 6. This will occur slightly before the lever 8 has completed its operative movement and consequently during the remainder of such movement the lever will store up, in the resilient means, energy tending to urge the vbolt still further in the advancing direction.
  • Such arrangement will be advantageous both in providing a smooth action and also in ensuring at all times a rm and secure retention of the door in the fully closed condition by the bolt.
  • a very stiff spring or other member could be used to connect lever I6 to the member I4 so as to act susbtantially the same as a rigid member.
  • the said lever 3 is preferably designed also to retain the bolt 4 in its retracted condition.
  • this purpose is accomplished by forming the extremity of such lever with a4 roll or lateral projection 2I vadapted to overlie and receive the extremity of the bolt when in this condition.
  • the point of the bolt 4 may be bevelled slightly as at 22 at the. side at which it first encounters the catch-plate Ii in order to facilitate its engagement with the latter in the event of the door being closed when such bolt is not in its fully retracted position in which it is retained by the formation 2I, as above described.
  • the bolt may be capable of being retracted slightly in response to such contact of its bevelled surface 22 with the catch-plate, the portion of the cam-surface I2 which produces the initial advancing movement oi the bolt is preferably designed to operate upon the bolt with a reversible action in which, under such conditions, an inward thrust applied to the bolt will produce a turning of the cam in the direction in which it permits such retracting movement of the bolt.
  • cam surface is preferably arranged to advance the bolt with an irreversible action thereby positively locking such bolt against retraction and so precluding the possibility of such bolt working back and so relaxing its restraint upon the door.
  • the cam I I is provided with an inner operative surface 23 disposed parallel with the aforementioned surface I2 and engageable with an anti-friction roller 24 or shoulder or other suitable formation upon the portion of the bolt to the inner side of such surface 23.
  • the arrangement is such therefore that the engagement of the roller 24 by the surface 23 will serve to retract the bolt when the cam is turned in the opposite direction to that' in which it advances the bolt, as hereinbefore explained.
  • This manual turning of the cam may be effected in any suitable or convenient manner.
  • a handle 25 protruding from the side of the door and fixed upon a stem or spindle 26 ⁇ pivotally mounted within the housing I where such spindle is provided with an arm 2l normally occupying, under the tendency of a spring 28, an inoperative position as here shown and from whence it is adapted to be turned by the handle 25 to engage and turn the aforementioned lever I6 in the opposite direction to that in which such lever is actuated by the connection I5.
  • guard againstrpossibleinjury to the parts underl such conditions'the-link I8, which it Will be noted acts in thrust inthe boltiretracting movement, is preferably'arranged to'befslidable through its connecting pivotr I9 uponfthe camand such link is provide'd'with ⁇ a cushioning spring 29 interposed in compression between-ananchorage point 30 uponsuch linkyand the pivot I9.
  • the arrangement is such that While capable of withstanding the pressurenecessary to perform the bolt-retracting movement of the cam, the said spring, underan" excessive/thrust will give, thus per- I'nittin'g the link rto slide through the pivot to a slight extent and so cushioningfthe movement untiltheV control handle strikes its limiting'stop 3I.v *J' Y n v ⁇ Inoperation,fthe doorV 2 is Vin the open conditioniand 'the latch-bolt 4 in its retracted position with its outer end engaged by the lever 8.
  • latch bolt instead of being slidable within a guide as 3, may be otherwise movably mounted in the housing by any suitable equivalent means which will permit of its advancing and retracting.
  • kA latch in accordance with the present invention may be incorporated in one frame or housing with the mechanism of a key lock, in accordance with the common practice in the construction of the mortice-lock or other types used upon the doors of a building, or such latch may consist of a separate article of any suitable size for use variously upon the doors of rooms, cupboards, windows or the like, or again the construction would be applicable to locks designed for special purposes, such for example as those employed upon the doors of motor vehicles, aeroplanes and the like.
  • such lock may, if desired, be of the type adapted to renderithe handle inoperative for manually retracting the latch-bolt, thereby leaving the latter securely in engagement with the catch-plate until i the' function of the handle is restored by the use ofthe requisite key, or locking action.
  • a latch housing for attachment to the door, a latch bolt slidably mounted in said housing to engage a catch plate upon a stationary door frame, a pair of projections on said latch bolt, a cam member having a /ilange engageable between said projections, said member being pivoted to said housing, athrust lever pivoted to said housing, a link pivotally connecting said cam and said thrust lever, a dog pivoted to said housing and adapted to engage the catch plate ywhen vclosing the door, said dogl having van arm, a spring connecting said thrust lever and arm, a handle pivoted to said housing and having a spring normally holding the handle in a given position, said Ahandle having a lever engageable with said thrust lever :for manuallyopening the door.
  • a latch housing for attachment to the door, a latch bolt movably mounted in said housing to engage a catch plate upon a cooperating door frame, a cam member having a. iiange engageable with said latch bolt and adapted to advance and retract Said bolt, said cam member pivoted to said housing and having ⁇ the face of the iiange thereof adapted to resist backward movement of said latch bolt when theV same is in its substantially advanced position, a thrust lever pivoted to said housing, a link pivotally connecting said cam and said thrust lever, a dog pivoted to said housing and adapted to engage the catch plate when closing the door, said dog having an arm, a linkage connecting said thrust lever and arm., a handle mounted through said housing for manually operating the latch to open the door.
  • a latch for a door or the like, a latch housing, a guide in said housing, a latch bolt slidably mounted in said guide and movable through an opening in said housing to engage a catch plate upon a stationary door frame to retain the door in closed position, a cam having engagement With said latch bolt to advance and retract the latter upon rotation of the cam, the face oi said cam being so shaped as to permit reversible, action of said latch bolt during the early stages or the advancing movement, a latch dog pivoted to said housing and engageable with said catch plate upon closing the door and a linkage connecting said catch dog and said cam for advancing said cam to advance the latch bolt when the door is closed and a. handle having means for engaging said cam to withdraw said latch bolt manually to open the door.
  • a latch housing adapted to be attached to the door, a latch bolt movably mounted in said housing, a pair of projections on said latch bolt, a member having a cam-shaped flange engageable between said projections, said member being pivoted to said housing, a thrust lever pivoted to said housing, a link pivotally connecting sai-d cam and said thrust lever, a dog pivoted to said housing and adapted to engage the catch plate when said vdoor is in closed position, said dog having an arm, a spring connecting said thrust lever and arm, a handle pivoted to said housing and havinga spring normally holding the handle in a given position, said handle having a lever engageable with said thrust lever for manually opening the door.
  • a latch housing adapted to be attached to the door, a latch bolt movably mounted in said housing, a member having a cam-shaped flange engageable with said latch bolt and adapted to actuate said latch bolt, sai-d member being pivoted to the latch housing, a thrust lever pivoted to said housing, a link pivotally and resiliently connecting said cam and thrust lever, a dog pivoted to said housing and adapted to engage the catch plate when said door is in closed position, said dog having anarm, means for connecting said thrust llever and arm whereby said latch bolt is actuated by said latch dog.
  • a latch for a door or the like having a cooperating doo-r jamb with a latch bolt abutment, a latch housing having an opening therein, a latch bolt movably mounted in said opening to engage said latch bolt abutment to retain the door in closed position, a cam operatively connected to said latch bolt to hold said latch bolt in closed position, a latch dog mounted on said housing and adapted to hold said latch bolt in withdrawn position when the door is open, said latch dog being engageable with said door jamb upon closing the door, a linkage connecting said latch dog and said latch bolt to advance the latch bolt when the door is closed, and a handle to withdraw said latch bolt manually to open the door.
  • a latch for a door or the like having a cooperating door jamb and a latch bolt abutment, a latch housing, a latch bolt mounted in said housing to slide horizontally and adapted to engage said abutment to retain the door in closed position, a cam operatively connected to said latch bolt to hol-d said latch bolt in closed position, a latch dog, a vertical pivot connecting said dog and said housing, said dog having a recessed retaining portion engaging the end of said bolt when the latter is in retracted position, said door jamb having a lug engageable with said dog when the door is closed to disengage sai-d dog from the end of said bolt, linkage including an elastic member between said dog and said bolt, whereby the engagement of said lug and dog during closing movement of saidr door advances said bolt.
  • a latch for a door or the like having a cooperating door jamb and a latch bolt abutment, a latch housing, a latch bolt movably mounted in said housing to engage said abutment to retain the door in closed position, a cam operatively connected to said latch bolt to hold said latch bolt in closed position, a latch dog pivoted to said housing and comprising a hook-shaped memberengaging the end of sai-d bolt when the latter is in retracted position, said door jamb having a part engageable with said dog when the door is closed to disengage said dog and said bolt, linkage including an elastic member between said dog and said bolt, whereby the engagement of said part and dog during closing movement of said door advances said bolt.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
US34868A 1934-08-15 1935-08-06 Latch Expired - Lifetime US2148693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ2186335X 1934-08-15

Publications (1)

Publication Number Publication Date
US2148693A true US2148693A (en) 1939-02-28

Family

ID=19915790

Family Applications (1)

Application Number Title Priority Date Filing Date
US34868A Expired - Lifetime US2148693A (en) 1934-08-15 1935-08-06 Latch

Country Status (5)

Country Link
US (1) US2148693A (fr)
AU (1) AU2186335A (fr)
DE (1) DE667934C (fr)
FR (1) FR793796A (fr)
GB (1) GB439160A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767570A (en) * 1953-04-10 1956-10-23 Guardian Lockers Inc Coin-controlled locker
US3197160A (en) * 1961-09-06 1965-07-27 Tyler Inc W S Method of making screen
US20060055180A1 (en) * 2004-09-16 2006-03-16 Brose Schliesssysteme Gmbh & Co. Kg Motor vehicle lock

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767570A (en) * 1953-04-10 1956-10-23 Guardian Lockers Inc Coin-controlled locker
US3197160A (en) * 1961-09-06 1965-07-27 Tyler Inc W S Method of making screen
US20060055180A1 (en) * 2004-09-16 2006-03-16 Brose Schliesssysteme Gmbh & Co. Kg Motor vehicle lock

Also Published As

Publication number Publication date
DE667934C (de) 1938-11-23
GB439160A (en) 1935-11-29
FR793796A (fr) 1936-01-31
AU2186335A (en) 1935-10-29

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