Abstract: The present invention relates to an electronic lock having first and second disposed in axial alignment is provided. A first key inserted into the cylinders of the electronic lock sends an electronic signal to a solenoid which retracts a stopper from engagement with a latch plate upon turning the first key through an initial angle. Thereafter, the first key drives the first cylinder to drive a first cam which moves against a first cam follower to move the latch plate and withdraw the latch from locking engagement. In the event of an electronics failure and/or in order to manually override the electronics, a second key is inserted into the axially aligned cylinders. The second key initially drives the second cylinder to move a second cam against a second cam follower that bears against the stopper to remove the stopper from engagement with the latch plate.

Abstract: The several unassembled parts of a door lock assembly, nested axially within one another, are secured by axial retainer means which engage an aperture in the door lock assembly that is not used to secure inner and outer door lock assemblies to one another.

Abstract: A security bar that can be retrofitted onto a gate used in a typical fence construction to prevent unauthorized tampering with or opening of the gate. The device includes a rigid locking bar that is firmly mounted to the gate, a T-shaped strike plate, and a key-actuated latchbolt mechanism mounted within the inside of the rigid locking bar so that the latchbolt and strike plate cannot be accessed for tampering. The strike plate is mounted to a conventional fence post with fasteners that are not accessible when the gate is closed. Using the present device, which can be retrofitted to any type of outdoor gate, a positive locking action insures that the gate is locked at all times and cannot be jimmied or pulled upward to a position that would allow it to be opened. The locking mechanism allows access from either side of the gate for actuation.

Abstract: A key and an installation double cylinder for a security lock is disclosed with two cylinder halves, a cylinder core and tumblers which are constructed as core pins and housing pins and can be brought into line by means of the key, which can be inserted into the keyway to release the cylinder core for rotation. The key has, at its bit, a lengthening element by which the tumblers in an oppositely located cylinder half can be brought into line for free turning. The cylinder half on the outside of the door can have a solid rotor of hardened steel which protects the cylinder half on the inside.

Abstract: A door lock includes a deadbolt assembly and a lock housing assembly. The deadbolt assembly has a bolt member which includes a metal inner sleeve, a metal outer sleeve fitted over the inner sleeve and made of a material which is different from that of the metal inner sleeve and which has anti-corrosion properties, and a security bar disposed axially in the inner sleeve. The lock housing assembly includes an exterior housing section with a cylindrical chamber that receives rotatably an exterior lock cylinder unit therein. The lock cylinder unit has a key-operated rotary plug with a rearwardly projecting spindle that is connected operably to the deadbolt assembly. An interior sleeve member is formed as a cylindrical wall with a front end which is secured to the rear side of the lock cylinder unit and a rear end which is formed with diametrically opposite notches. The deadbolt assembly extends through the sleeve member via the notches.

Abstract: The invention is directed to a web which has a plurality of parts extending in the longitudinal direction of the web and placed against each other. These parts may be stamped sheet metal parts or cast parts, which can be produced in a very cost-effective manner. Two outer parts can form a shell, into which a stamped interior part of steel has been inserted. These two parts can be produced cost-effectively as cast parts, for example of zinc, aluminum or a plastic material, and the interior part (12) can be produced as a stamped sheet metal part. The invention permits a particularly cost-effective production of the web and in bending tests was shown to be particularly stable.

Abstract: A double cylinder tubular deadbolt having the inside cylinder provided with a removeable cap or cover which covers the exposed screws in the flanged face of the inside cylinder. The removable cover fits over and covers the face portion of the inside cylinder. The cover is retained in place by an escutcheon which fits over the flanged face with the cover thereon.

Abstract: A door locking mechanism for a door assembly of the type having a door frame and a door mounted for pivotable movement between an opened and closed position with respect to the door frame, includes key-operated cylinder locks mountable on opposite sides of the door, the cylinder locks each having a tailpiece rotatable between a locking and unlocking position via key operation thereof. A bolt is mountable on the door and frame for locking the door in the frame when the door is in its closed position, the bolt being reciprocably movable between a locking and unlocking position. A lever is coupled to the bolt for reciprocably moving the bolt between the locking and unlocking positions thereof.

Abstract: An extension for a mortise cylinder includes an extension body have a bore extending through it. First and second coupling elements are simultaneously located in the bore in the extension body and are free to rotate within the bore. A coupling slot on the first coupling element is for coupling with one of a rotating element on a mortise cylinder or a further mortise cylinder extension. A coupling tenon on the second coupling element is for coupling with a cam member or a further first coupling slot in a further first coupling element. An interconnecting tenon on the second coupling element fits into an interconnecting slot on the first coupling element for the propagation of rotation from the first coupling element to the second coupling element and to either a cam member or a further mortise cylinder extension coupled to the second coupling element.

Abstract: A bar lock comprising two toothed plates (1) and (2) and a rotatable cross element (3) which transmits movement to said plates. The cross element (3) is operated by two mechanisms, one internal and one external, which act independently of each other; the internal mechanism is composed of elements which are specular to the elements of the external mechanism. Each of said mechanisms comprises the following elements: a recess (25) provided in the base plate (18) and in the counter-plate (12) respectively; a rotary element (5) rotatable within said recess, the rotary element having a seat for entraining a roller (6) and having engagement means for engaging a tang of a cylinder or knob; a disc (7) rotatable with the cross element (3) and having notches (26) and (27); a slider (9) maintained in contact with the cross element by a spring (10) fixed to a spring-guide block (14).

Abstract: A double cylinder lock assembly includes a drive mechanism for extending and retracting a bolt, and exterior and interior key cylinder on opposite sides of said drive mechanism. The assembly further includes a torque blade extending from one of the key cylinders through the drive mechanism in operable engagement therewith toward the other key cylinder. An engagable clutch is disposed between the torque blade and the interior key cylinder. The clutch includes a pair of disengagable drive members, one of which is engagable by the torque blade and rotatable therewith and the second of which is rotatable with the interior key cylinder. The second engageable drive member includes a drive lug extending radially inward towards the horizontal axis of the interior key cylinder.

Abstract: A double cylinder lock bolt has a key for the inside lock cylinder which is retained by a latch operable from the outside locking cylinder. Three alternative means for preventing operation of the inside cylinder by the outside key are disclosed. The arrangement makes a double cylinder deadbolt more suitable for use in fire or panic situation without sacrificing security.

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 dead bolt lock set is designed to be key actuated on the inside as well as on the outside of the door. For the inside there is an inside tailpiece in engagement with a drive slot in the dead bolt hub. A lost motion circumferential recess on the inside tailpiece provides stops at positions such that when the key is inserted on the inside and turned to lock the dead bolt by action of a micro drive pin, the key cannot be returned in reverse direction to key release position without unlocking the dead bolt. Consequently, the key must remain captive in the inside keyway to keep the dead bolt locked because of being held in the cylinder by the pin tumblers.When the lock has been locked from the outside, the drive slot in the head of the tailpiece is rotated out of line with the inside key slot. Under this condition when unlocking from the inner trim, the tailpiece and washer are forced inward by the key tip compressing the conical spring and allowing full key insertion.

Abstract: A double cylinder lock constructed with a single tailpiece driver and a clutch. The interior lock key can be extracted only when the lock bolt is retracted and not when the lock bolt is extended. The driver and clutch arrangement prevent either cylinder from becoming out of time, regardless of which cylinder is used to throw the bolt.

Abstract: An adaptation for a mortise lock having a double-ended primary lock "cylinder" of "keyhole" cross-section mounted through a conforming opening in the mortise lock case, provides for use of key-removable lock cores and increases security by preventing removal of the lock cylinder except after removal of a core with a special control key. Two key-removable cores are mounted in chambers at opposite ends of a housing which fits through the cylinder-receiving opening of the mortise lock case. A bolt-actuating cam between the chambers lies within the case and is alternatively engaged by shuttle throw plug members respectively moved to engaged position by thrust of a key in one of the cores and is operated by rotation of such key. The cores require a special control key for removal and are shaped or mouned so as to project laterally from the lock cylinder and thereby to block passage of the cylinder out of the conforming opening of the lock case until removed by a control key.

Abstract: A security type dead bolt for a door is arranged so that a key must be used on the inside, as well as on the outside, to extend the dead bolt to locked position, in that way to prevent an unauthorized person opening the door from the inside after surreptitious entry. To make certain that when the occupant is at home and with the latch bolt extended by the inside key to locked position, there can be no lost key situation blocking exit by the occupant in case of an emergency such as a fire, the dead bolt mechanism is arranged to trap the key in the lock whenever the dead bolt is extended to locked position, but to release the key when withdrawn. A yieldable mechanism permits unlocking the latch bolt from the outside even when a key is left in the lock on the inside.

Abstract: A lockset of the type having a bolt reciprocal from and to a door edge by an operating mechanism including a crank hub and locks at opposite door faces has tubular torque blades between the locks and crank hub for transmitting rotative motion from the locks to the crank hub and ultimately to the bolt for the bolt reciprocations. Both of the torque blades have tubular inner ends of D-shaped cross section with one extending axially a major part of a crank hub D-shaped cross section axial opening and telescoping the other within the crank hub. Outer enlarged tubular ends of the torque blades are telescoped by ends of lock plugs of the respective locks and have partially circumferentially extending slots formed therein receiving radial tongues of washer-like members positioned circumferentially over the lock plug ends. Thus, the torque blade inner ends are single position, rotative drive connected to the crank hub and outer ends thereof are lost motion drive connected to the locks.

Abstract: A double cylinder safety lock has a bolt projected and retracted by a device having a rotatable hub. A key operated exterior device has a lost-motion connection to the rotatable hub so the key can be extracted from the device with the bolt in projected position or retracted position. A key operated interior device has either a direct or a lost-motion connection (depending upon the key used) to the rotatable hub, the hub connections being arranged to turn together. A key for the interior device can project and retract the bolt but can be extracted only when the bolt is in retracted position.

Abstract: There is disclosed an emergency key mechanism on a cylinder lock with a double locking cylinder and a locking coupling axially moveably fitted thereon.

Abstract: A lock cylinder housing assembly is received in a through bore of a door and coupled therein without the use of external or internal machine screws. A coacting dead bolt assembly in a bore formed in the door at right angles to the through bore bridges the through bore and extends through a transverse passage of the housing assembly to prevent rotation of the assembly or disassembling thereof from the exterior or interior of the door. A catch release mechanism on the dead bolt assembly is accessible only when the door is open to allow releasing of the catch means which allows removal and disassembly of the housing assembly at the inner side of the door.

Abstract: A cylinder lock comprises two barrels in axial alignment on either side of a web. Each barrel is formed as two opposed elements disposed in either side of a longitudinal plane in which the keyhole is formed by confronting surfaces of the opposed elements. The web is engageable with internal end parts of the barrel elements and each barrel comprises tumblers received in the barrel and operable by a key inserted in the keyhole. A one-piece lock block has a central recess through which the web passes and two rectangular parts on either side of the recess each having a narrow top surface contiguous with one of the barrels. Pins are received in bores in the lock block and the pins are spring-biased to lock the barrels when the key is absent. Two housing members each engage over one of the rectangular parts and the corresponding barrel to maintain the barrels in contact with these parts.

Abstract: Disclosed is a bar-tumbler type safety lock, as well as a key and a coding process for said lock. According to a single-key-entry embodiment, this lock comprises a body, a two-piece washer, a latch holder and a barrel having recesses in which notched tumblers can slide and which is maintained rotatingly and removably toward the front of said body by a stud and a stopping finger retained in two annular slots made radially in this body and which can be retracted by the introduction of a special extraction key into the lock; the coding of the lock is obtained by the forming, in the annular washer-assembly groove, of notches simultaneously in each of the tumblers by a conventional turning process, with the key inserted.

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.