Abstract: A combinating tumbler lock featuring zero clearance between the lock plug and mounting shell including: a mounting shell having a central throughbore with a front section having a first, greater diameter and including longitudinal locking grooves, a rear section having a second smaller diameter and including longitudinal stopping grooves, and a tapered transition section between the front and rear sections; a lock plug for selective rotation within the mounting shell and having three sections corresponding in diameter to the sections in the mounting shell, the lock plug front section including a tumbler receiving opening, the lock plug rear section including a cam-receiving structure and a first radial throughbore, the lock plug also including a second radial throughbore between the front section and the tapered section; a tumbler disposed in the lock plug for selective engagement with the longitudinal locking grooves of the shell; a spring loaded stop comprising two spherical balls actuated by a compression

Abstract: An interchangeable core and housing assembly comprising a cylinder housing (42) which has a central opening with an alignment bracket (44) in one part of its cross-section and an interchangeable core (60) in the remaining part. The interchangeable core comprises a cylinder body (61) with a central bore and a radial projection (62) which fits into a radial slot of the aligning bracket. The radial projection has a plurality of radial recesses containing a plurality of spring-loaded top driver pins (66). A cylinder plug (46) is a inserted into the central bore of the cylinder body. Cylinder plug has dimples (78 and 80) on its exterior, a keyway (82), and a plurality of radial recesses with bottom pins (67). Interchangeability of the core is achieved by providing an annular groove (55a and 55b) formed in the central opening of the cylinder housing and locking balls (84 and 85) installed into holes (70, 71, 72, and 73) of the cylinder body.

Abstract: A locking device consisting of key (2) and locking cylinder (1), in particular for the actuation of electric microswitches on keyboards, telephone or the like, has a locking cylinder housing (5) and a cylinder core (11) arranged for rotation in the bore thereof and cooperating with tumblers (16). The key (2), which has a stepped-down key shaft (35) is insertable into the cylinder core which has a head plate (12), coming after a specific rotation to rest against stops of the locking cylinder housing (5). In order to obtain a simplified construction with increased security and small structural length, there is a free space between the head plate (12) of the cylinder core (11) arranged on the front side of the locking cylinder (1) and the head end (14) of the locking cylinder housing (5). Into the free space the key-shaft shoulder (37) enters, and one or more stops of the locking cylinder housing (5), are arranged at different distances from an axis of rotation of the core.

Abstract: A lock construction including an outer case having a central opening that receives a cylinder. A plurality of plate-type tumblers are mounted for sliding movement within a passage in the cylinder and the tumblers have aligned slots to receive a key. The side wall of the case is provided with a longitudinal opening or window and a pair of shoulders border opposite sides of the opening. A cover encloses the opening and has a pair of side flanges that removably engage the shoulders of the case. In assembling the lock, the tumblers are inserted into the cylinder through the opening in the case and the cylinder is then rotated to effect engagement of the tumblers with the ward in the case, which is spaced 90.degree. from the opening, and the cover is then snap-fitted onto the case. By removal of the cover, the tumblers can be readily removed from the cylinder.

Abstract: A device for protecting motor-vehicles against theft comprising a freely rotatable sleeve covering the polygonal head of a wheel nut or screw, into which sleeve a cylinder lock engages rotatably, which lock is provided with at least one tumbler entering the inner wall of a cylinder lock location cavity of said polygonal head which projects beyond the circumference of said cylinder lock. In the locking position, said tumbler engages behind a cooperating locking shoulder which is located on an annular body inserted into an axial chamber of said polygonal head and locked in position thereto.

Abstract: A lock which is rekeyable or programmable to operate with a different key from the exterior thereof without disassembling it or removing it from a lock assembly in which it is assembled is disclosed. The lock is rekeyed by a change key through the keyway so that the lock appears from the exterior thereof to be a conventional lock. The change key which can not operate the lock adjusts a movable shear line formed by what is in effect an externally adjustable tumbler. The lock includes a plurality of pin tumbler sets and a plurality of cylinders disposed one in the other in the lock casing. The pin tumbler sets and the cylinders cooperate to from a plurality of common pin tumbler shear lines, i.e., shear lines formed by a number of individual shear lines of individual pin tumbler sets. In a given position of the adjustable shear line, only one of the keys will position the pin tumblers to form the proper common pin tumbler shear which is aligned with the adjustable shear line to operate the lock.

Abstract: A cylinder lock with a removable plug incorporates a series of spring biased combinating disc tumblers which cooperate with a first key in normal lock operation. An additional, unbiased control tumbler at the end of the plug cooperates with a retention flange associated with the cylinder to retain the plug against removal from the cylinder while permitting rotation of the plug in the cylinder. The control tumbler includes a notch for receipt of the first key as well as a second, plug removal key. The first key acts against one edge of the notch to displace the control tumbler into a position which ensures that the tumbler will remain engaged with the plug retention flange regardless of the orientation of the plug.

Abstract: There is disclosed an improved rotatable cylinder lock of the type formed by a cylindrical housing and a removable elongated lock core, the cylinder housing including a tumbler block positioned within the cylindrical housing and extending inwardly with respect to the cylindrical housing, and a tumbler ledge having an interior peripheral surface mounted within the cylinder housing adjacent the tumbler block and extending circumferentially for a portion of the periphery of the cylinder housing, the lock core including a plurality of lock tumblers and a release tumbler which is positionally carried by the lock core to ride on a shoulder formed by the tumbler ledge throughout the rotational movement of the lock core, except in the unlocked position when the release tumbler is positioned such that it is free of blockage by the tumbler block thereby to permit removal of the lock core from the cylindrical housing, the lock core further including a block restrictor relief section formed therein which accommodates the

Abstract: A key-in-knob type cylinder replacement system comprises a replacement cylinder having a generally cylindrical shell and a plug having a keyway and housing pin means to prevent the rotation of the plug. A false bible dimensioned to be generally commensurate in size and shape to the projecting pin housing of the cylinder to be replaced is mounted to the cylinder shell. An adaptor means for actuating the latch assembly in response to rotation of the replacement plug is secured to the replacement cylinder plug by means of a clip. A replacement kit provides a plurality of false bibles and adaptor means, each of which is adapted to be mounted to the plug of the plug-shell combination to form a replacement for a conventional key-in-knob cylinder.

Abstract: A pin-type lock cylinder telescopes a rotatable lock plug with a multiplicity of generally axially and radially aligned pin holes formed in each and pins in the pin holes controlled by a key inserted axially into the plug for properly radially positioning the pins and permitting unlocking rotation of the plug. At least one of the cylinder and plug, and preferably both, are axially split members formed of generally diametrically opposed parts with the axial split passing through the axially aligned pin holes. One of the split member parts having an axially and radially flat surface extending continuously along said pin holes and forming one side of the pin holes with axial spacing therebetween, the other of the split member parts having axially spaced and radially extending grooves, preferably D-shaped cross section grooves, formed therein to complete the pin holes.

Abstract: A cylinder lock assembly is provided with a cylindrical plug that may be interchanged and used in different exterior body members without changing the exterior body member of the assembly. This is of advantage to eliminate the need to stock a variety of expensive cylinder assemblies for plugs having different keyways or keys with different bitting locations. It is only necessary to maintain a supply of different plugs and keys. Commonality of parts for mortise and rim type locks also reduces inventory required in commercial and institutional establishments.The pin bores in the exterior members and the pin bores in the plugs are located a constant distance away from a selected reference point in the lock assembly and the exposed keyway face of the plugs. As a result, the pin bores in one or more plugs will align with the pin bores in one or more exterior body members so that the plugs may be used with different exterior body members.

Abstract: A key-removable core of figure-8 cross section having increased pull resistance. A recess is formed in the pin tumbler lobe of the core body and opens both outward through the side of the body and downward toward the key plug lobe. A control sleeve in the key plug lobe has a wide longitudinal rib which carries a core-retaining lug which extends from such rib both circumferentially of the sleeve and radially outward thereof into said recess so as to substantially increase the effective cross section of the lug for increased pull resistance. Cores with thus enlarged lugs may be used in standard receptacles. Also, the plug may be in two segments providing two end faces for retaining engagement with two shoulders in the wall of the receptacle. The lug may be further enlarged by increasing its length, and the increased length accommodated by forming the core chamber with deeper clearances and wider lug-engaging shoulders.

Abstract: An improvement in a plate tumbler-type cylinder lock mechanism including an elongate barrel having a longitudinal bore therein, and a key plug having a body portion and a shaft portion extending therefrom, such plug being received rotatably in the bore with the body portion extending between opposite ends of the barrel and the shaft portion extending outwardly from one end of the barrel, the bore having a draft-induced longitudinal taper widening in the direction of the said one end of the barrel, such improvement including journal means on the body portion and projecting laterally therefrom for journalling the plug in the barrel adjacent to the said one end thereof, thereby to minimize lateral play between the plug and the barrel thereat. Preferred structure for limiting the rotation of the plug embodies stop means for interengaging the journal means and the barrel.

Abstract: The invention relates to piston-type locks preferably for use with vehicles. In the lock according to the invention the stator comprises an aperture opening at its periphery and into the said longitudinal bore, the said aperture receiving an insert comprising radial passages in each of which there are lodged a pair of pistons and a return spring, the said insert being in two parts sliding telescopically one in relation to the other to reduce the effective length of the said radial passages, the said insert comprising retractable stops for the inner radial extremity of each of the said pairs of pistons, the retraction of the said stops causing the liberation of the said pairs of pistons and the introduction of the inner pistons into the radial bores of the rotor.

Abstract: A key-changeable lock core of FIG. 8 cross section has a core body with key plug and pin tumbler housings, and a key plug supported for rotation in the key plug housing. A control element, desirably a sleeve about the key plug having a thick top segment carrying a core-retaining lug, is mounted in a core-body recess for rotation between a core-locking position and a lug-retracted position. Its inner face defines an operating shear line at the surface of the key plug, and its outer face defines a control shear line at the top face of the recess, which is preferably a flat planar face. The outer face of the control element has an arcuate portion in the vicinity of the pin tumbler barrels on a radius of curvature about the axis of the control element, and has a planar face portion extending toward the retaining lug in diverging relation with such curvature, preferably tangentially therefrom.

Abstract: A theft proof lock which includes a protective sleeve rotatively disposed relative to a lock cylinder so that the protective sleeve is free to rotate whenever a torque or turning movement is imparted thereto by one attempting to tamper with the lock to secure against unauthorized access to the lock secured premises and thereby prohibiting such tampering from defeating the lock.

Abstract: In a cylinder lock (1) one or more (2a, 3a) for locking pins (5) are formed in the cylinder housing (2) and the cylindrical body (3), and the bores in the cylinder housing have a slope relative to a normal to the axis of the cylinder housing. When the cylindrical body is rotated through 180.degree. by a correctly inserted key, a crescent-shaped part of each pin engages the wall of the cylinder housing so that the pins are held in the cylindrical body (2) without falling out through the mouths (2a') of said bores, although said mouths are not plugged. The problem of producing a simple and inexpensive method of manufacture for a cylindrical lock having a smaller number of elements than known locks is thus satisfactorily solved. The slope angle is suitably from 2.degree. to 3.degree..

Abstract: A double pin tumbler cylinder for a security lock in which a pin tumbler rotates in a cylinder housing. The cylinder housing is composed of an axial stack of discs punched from a sheet of chrome-nickel steel. The individual discs are soldered or welded together to constitute a rigid element. The discs have a tang portion in which an opening is made so that the assembled stack defines a channel for receiving a bar of chrome-nickel steel for additional reinforcement of the cylinder. The bar has an enlarged central portion with a threaded bore for receiving a locking screw.

Abstract: A tumbler lock is disclosed comprising a body and a cylindrical plug having an axial key passage rotatably mounted in the body. The plug and the body have aligned radial holes containing respective sets of tumblers, the tumblers in the body holes being spring urged toward the plug. The holes in the body have an outer conically tapering portion into which the respective tumblers are wedged prior to assembly of the lock and during assembly the tumblers are pressed out of these conical portions by a tool inserted into an opening in the body.

Abstract: The control device for cylindrical locks includes a housing having on its inner surface longitudinal and annular guiding recesses, a cylindrical plug or core rotatable in the housing about its center axis and defining on its surface second recesses, at least one magnetic rotor supported in the plug for rotation about an axis transverse to the center axis and defining a third recess alignable with the second recess, control strap arranged for axial displacement on the plug and being rotatable therewith, and arresting elements projecting from the strap into the first and second recesses and being axially displaceable with the strap into engagement with the third recess in the rotary member when this third recess is in alignment with the second recess.

Abstract: A cylinder lock assembly is disclosed which comprises an outer cylinder having a front end with a key hole and a rear end with an end member. The outer cylinder encloses a rotatable inner cylinder. The end member and the outer cylinder are provided with mutually corresponding groove arrangements forming an axially fully interlocking attachment, between these two parts. The end member is insertable in a radial direction into the outer cylinder for attaching it thereto. The assembly also includes an attachment locking member engaging the outer cylinder and the end member in order to lock the end member to the outer cylinder in radial direction. The assembly can also be provided with a latch member arranged to move radially guided by the end member and the outer cylinder. The latch member may also serve as a fastening member of the assembly.

Abstract: For use in a lockset there is provided a cylindrical housing having a projecting wing and having a bore concentric with an axis. An axially extending rib projects into the bore. A first tumbler mechanism is disposed largely in the wing portion of the housing and includes first tumbler chambers extending through the rib to the bore. A plug is rotatable in the housing about the axis. The plug includes a plug shell and a plug core normally interfitted and axially separable. The plug shell has an axially extending recess therein open at one end. The plug has an adjustable cap adjacent one end and a disc on the other end to limit axial movement. The plug core has a second tumbler mechanism cooperating with the first tumbler mechanism and opening into a keyway therein. The plug core is receivable in the plug shell recess and has a lug on the end opposite the disc interengaging with an inturned flange on the housing to limit withdrawal movement of the plug core in all except one rotary position.

Abstract: A cylinder lock having a barrel with annular grooves, drivers aligned with the barrel grooves, key pins having slotted upper ends, at least some key pins having diametrically disposed chisel edges to cooperate with bitting cuts in the key for rotation of the key pins, and the drivers and key pins including provision for a magnetic interlock to prevent the drivers from hanging up on the shear line and the key pins from dropping away from the drivers, as in attempts at picking the cylinder. Projections adapted to enter into the pin slots and prevent rotation of the barrel except when the key pins are lifted to the shear line and rotationally oriented as needed are formed either on a gate or on the drivers.

Abstract: An automobile trunk lock which permits the trunk to be opened from outside or inside thereof. One end of a release arm is connected to a cylinder lock in the trunk lid and the opposite end extends through the latch release of a latch mechanism. A key is engaged with the inner terminal of the release arm. Actuation of the cylinder lock by a key or rotation of the interior key effects rotation of the release arm about its longitudinal axis to trip the latch release to disengage the latch mechanism and open the trunk.

Abstract: A pin tumbler cylinder lock having a plug eccentrically positioned within a cylindrical bore of a housing. Surrounding the plug are longitudinally aligned sleeve segments that together therewith form a composite plug unit that can be rotated in the housing bore by a proper key. Formed on the outer surface of each sleeve segment coincident with pinways therein are recesses that are spaced from the recesses in adjacent sleeve segments. Additional internal recesses are formed in the inner surface of at least one of the sleeve segments closely adjacent a pinway extending therethrough. The internal recesses receive the tumbler pin when it is forced upwardly simultaneously with the application of torque on the plug. In one embodiment, the internal recess is a single recess coincident with the pinway and extending circumferentially therefrom. In another embodiment, the internal recess comprises a pair of recesses located on opposite sides of the pinway and spaced circumferentially therefrom.

Abstract: A plate tumbler-type cylinder lock mechanism includes a plurality of longitudinal internal splines therearound adapted for receiving tumbler ends, means providing at least three internal circumferentially extending tumbler movement paths on the barrel and extending between one spline and another spline which is different for each path, a key plug assembly rotatable in the barrel and including a key plug and a plurality of spring-pressed plate tumblers mounted in the plug, the tumblers being mounted for reciprocal transverse movement upon insertion and withdrawal of a bitted key with opposite tumbler ends projecting alternately from opposite sides of the plug, certain tumblers being adapted to be projected outwardly with their ends in respective registering movement paths when a key is inserted, whereby such ends may travel in the movement paths when the plug is rotated, and means adjacent to at least one end of each movement path adapted for engagement with the tumbler end traveling in the path to prevent tra

Abstract: A pin tumbler cylinder lock having a plug eccentrically positioned within a cylindrical bore of a housing. Surrounding the plug are longitudinally aligned sleeve segments that together therewith form a composite plug unit that can be rotated in the housing bore by a proper key. Formed on the outer surface of each sleeve segment coincident with pinways therein are recesses that are spaced from the recesses in adjacent sleeve segments. The bottoms of the recesses form false shear levels that hinder picking operations while the side walls thereof form pin obstructions that prevent forcible axial removal of the plug and sleeve unit from the cylindrical housing. Additional security is provided between the plug and at least one sleeve segment by a mechanical coupling that prevents relative axial motion therebetween. The coupling prevents axial removal of the plug.

Abstract: A cylinder lock comprising a plug, with an eccentric face, a cylinder and an eccentric sleeve between the plug and cylinder. When a proper key is inserted and raises the pins to operating shear level the plug and sleeve can be turned as a unit on an axis to unlock or lock, but in the event there is a single pin restraining the rotary motion of the sleeve, only a limited plug motion is permitted as it is now in an eccentric relation with respect to the cylinder. Picking of the lock is prevented by dividing the sleeve into segments rotatable with respect to each other and providing each with circumferentially extending recesses in which tumbler pins can become ledged.

Abstract: In a door bolt lock a tubular housing extends through a bore in the door near the edge thereof for housing at least one lock cylinder assembly coupled in mechanical operative association with a lock bolt assembly passing from the edge of the door into the tubular housing via an intersecting bore in the door. The tubular housing includes first and second axially separable coaxially aligned portions having flanges on their outer ends for capturing the door therebetween. The first and second tubular housing portions are threadably coupled together either directly or via a threaded insert, whereby the length of the housing is adjustable for accommodating doors of various thicknesses and whereby the two halves of the lock cylinder housing are coupled together by means of a relatively strong threaded tubular structure to make it more difficult to break apart the two halves of the housing.