US2257741A - Lock - Google Patents

Description

ocr. 7, 1941.

` R. L. 'GRAY I LOCK Filed Jan. 25, 1940 Patented Oct. 7, 1941 vUNITED sTATEs PATENT OFFICE LOCK Rollin Lester Gray, Chicago, Ill., assignor to The Illinois Lock Company, Chicago, Ill., a corporation of Illinois Application January 25, 1940, Serial No. 315,559

4 Claims. (Cl. 'I0-85) y My present invention is concerned with a lock, preferably operated Iby'a key, having an associated locking bolt which may be conveniently assembled and secured in place after the locking mechanism has been installed. Such a lock may `be advantageously used for various purposes, one

with the rear end thereof broken away to exhibit a vertical section therethrough;

Fig. 5 is an enlarged fragmentary detail in section showing the parts in the position occupied when the bolt is being disconnected from the lock Plug;

Fig. 6, which is a similar View, shows the bolt in the position it occupieswhen iirst inserted in the lock, preliminary Ito establishment of its pivotal connection with the plug. o

The lock is here illustrated as applied to a metallic desk having a top T which overhangs a suspended molding M formed on its under side with an opening 'I for the reception of a vertically movable locking bolt. This apertured molding constitutes a keeper and will be so referredto hereinafter. The precise construction of the desk top and molding is of'relative unimportance. Sheet metal forming spaced walls is suggested in the drawing.

Below the desk top is a drawer D having a vertical front wall 8 anged rearwardly at 9 to provide a top wall for connection with a secondary wall II) which denes with the front wall a narrow chamber wherein is accommodated the lock which will presently be described. The top wall is formed with an opening I adapted to register withthe opening 'I in the keeper when the drawer is in its normally closed position.

The present lock is adapted to be mounted upon the front wall of the drawer wherein -there is an opening II through which is extended the lock barrel B to occupy a position within the chamber just rearwardly of the front wall. A ange I2 which is aixed to the barrel at its outer end section taken on `line wall. Against the inner face of this wall may be tted a washer I3 adapted to receive pressure from a lock nut I4 which is in screw-threaded engagement with the threaded exterior I5 of the barrel. It is to be assumed, of course, that mounting of the lock in place will precede tting of the secondary wall I0 to its final position.

The barrel body may be of conventional form in that it is provided with opposed attened surf.

faces ls which extend for the fun length tne'rf and therebeyond in the form of spaced walls be remains upon the outer face of tfhe drawer front tween which is a plate II at the inner end of the lock body. This plate is slightly spaced from the inner end of a rotatable plug P which mounted within the barrel and adapted to be turned in response to operation of a proper keyv K which may be inserted within a key-way which is open at the front end of the lock. The details of construction of the plug and of the tumbler assembly carried thereby are unimportant to this invention, and so are not disclosed in detail. It may follow any of the usual constructions.

The narrow space to the inside of the plate I'I at the rear end of the barrel provides a guideway, open at opposite ends, for the recep tion and sliding motion therein of a shank I8v which extends in a plane transversely of the axis of the plug. As shown, one end of the shank is beveledrto provide a cam at I9 and at a medial point lengthwise thereof it is formed with a transverse way, such Aas the slot 20 which may be extended, if desired, clear through to one edge of the shank. A head 2| is carried at the shank end opposite the bevel. 'The shank-head assembly constitutes the locking bolt `which is adapted to be actuated by theplug when operated with the key therefor. So that motion may be communicated to the bolt, I provide an eccentric socket 22 opening out upon the rear end of the plug wherein there is received a hollow pin 23 with an outturned flange 24 at its inner.l

end adapted to engage a stop ring 25 `that is secured in place adjacent the outer end of the socket. As by means of a compression springv 26, confined within the hollow pin and exerting oppositethrusts against the plug and pin, the

latter is normally urged to a protruding positiony beyond the rear end of the plug as far as permitted by engagement of the pin flange 24 with, the stop ring 25. In this position the protruding;

end of the pin lies within the guide-way where it is .adapted to enter the transverse slot 20 -of the bolt.

When the bolt is rst introduced in place by Vlocked in' its closed position.

insertion of its beveled end i9 into the guide- Way, the normally protruding pin may be forced to recede when the bolt shank is further advanced therewithin. When it has been moved sufficiently to bring the slot 2U into register with the pin, the latter will snap outwardly into place therewithin to provide a pivotal connection between the plug and bolt so that with rotation of the former the bolt will be moved endwise within the guide-way. The bolt head,

which in one position will lie within the confines i of the opening Ill in the top plate 9, is adapted keeper in response to rotation of the plug con- .to be advanced therefrom into the opening 1 of the keeper whereby the drawer is ,Securely Access` toV the lock under such conditions is effectively barred. Should it be necessary or desirable to disassemble the boltfrom the lock, then a small Aimplement such as a nail N may be introduced through an opening 21 in the plate I1, this opening preferably lying opposite the pin 23 when the plug is in one extreme position of rotation, permitting the implement to advance, with consequent recession on the part of the pin until the bolt is free to be withdrawn. 'In order that the implementmay be permitted to pass through the opening 21, a further opening-28 maybe provided in the secondary wall l0 of the desk drawenas shown.

The lock of my invention is Yparticularly advantageous when installed in ya hollow inaccessiblespace as herein described. Only when the boltis retracted to permit opening of the drawer (or other locked structure) is Ait possible to effect removal of the bolt for any .purpose whatsoever'. `The holein the secondary wall of the desk front is generally unseen, andeven if noticed would have no meaning for the ordinary user. In assembling the lock, the bolt is addedelastafterthe drawer has been completed with the lock barrel installed inside the chambered front wall. The mere insertion and downward pushcomprising a barrel adapted for fixed attachment tothe other'structure and provided with a plug intraitableY in response to operation of `a proper key, there being a guide-way immovable` with respect to the barrel extending transversely of the plug at one end thereof and Substantially oppositethe keeper, a bolt movable to engagey or disengage the keeper and provided with va shank adapted for sliding movements within the sequent upon operation of a proper key, there being an opening through one side of the guideway and through the bolt shank opposite the locking connection therewith through which may be inserted .an implement to pressback the Y locking means whereby to free the bolt shank from its connection therewith.

3. In combination with two relatively movable structures 'one of which has a keeper, a lock comprising a barrel adapted for fixed attachment to the other structure and provided with a' plug rotatable in response to operation of a Y against and thereafter to advance into theway to establish a pivotal locking connection between the plugV and bolt in a manner whereby the bolt is caused to advance toward or recede from the keeper in response to rotation of the plug conguide-way, and means spring actuated to extend eccentrically from Vthe plug vend in sliding engagement with the shank adapted to establish. a pivotal locking connectionV between Vthe plugV andV bolt in a manner whereby the Ylooltjis caused to advance toward or recede from Ythe keeper Vin'res'ponse to rotation of theplug consequent upon operation of a proper key.

2. In combination with two relatively" movable. Y structures one of which has a keeper, a lock comprisingl a barrel adapted for flxedf attachment to the other structure and providedv withja plug vrotatable in response to operation-.of` a sequent upon operation of a proper key.

4. In combinationvwith two relatively movable structures one of which has a keeper and the other of which has spaced walls defining a chamber therewithin, a lock comprising a barrel adapted for xed attachment to the other structure within the chamber thereof and provided with a plug rotatable in response to operation of a proper key, there being a guide-way immovable with respect to the ybarrel extending transversely of the plug at the inner end thereof and substantially opposite the keeper, a bolt movableto'- engage or disengage the keeper and provided with Va shank adapted for-sliding movements withinthe guide-way, away extended transversely of the shank, a, retractable pin extended eccentrically from the plug end into the transverse way adapted to establish a pivotal locking connection between the plug and bolt in a 'manner whereby the bolt iscaused to advance -toward 'or recede from the keeper inresponse to rotation of theplug, and spring means urging the pin outwardly into engagementwith the bolt,v there beingan opening into the guide-wayin line withA the pin and a second opening throughk the adjacent structure wall in line with the first opening to permit Ythe'insertion therethrough'of an implement wherewithato retract the pin tof effect disengagement thereof from the locking -RoLLIN LsTER 'Green

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