Abstract: A security bar system for physically preventing unwanted opening of a door. The system preferably comprises an elongated, rigid, generally cylindrical bar which is adapted to extend in front of the door between a pair of mounting brackets. The door bar terminates at its opposite ends in flange members which are separated from the major length of the bar by reduced diameter segments of predetermined length. The door bar is adapted to axially penetrate, and be restrained by and between, the bracket members. Each bracket member includes a symmetrical slot geometry whereby to permit mounting of the system in either a right or left sided application. A first mounting bracket includes an elongated slot, the center of which is provided with a clearance hole to axially receive one bar flange. The reduced diameter segment of the door bar tracks within the extremities of the slot.

Abstract: By providing a single biasing element (spring) connected through pull rods to toggle means in laterally-inverted relationship, there are overcome the problems of (1) inequality of forces on the latching beams and (2) the need for relatively massive springs. The toggle means provide a force-multiplying effect. Moreover, no special actuating element is required for latching or unlatching.

Abstract: A window lock operable in association with either a right-hand or left-hand casement window having a cam movable to either one of two different lock positions relative to a keeper mounted on a window sash. One lock position is operative when the window lock is used with a right-hand casement window and the other lock position is operative when the window lock is used with a left-hand casement window. The movement of the cam is effected by a handle connected thereto by structure including connection means providing a mechanical advantage in movement of the cam by the handle.

Abstract: A casing for support from the free swinging edge of a door is provided and a latch bolt is shiftably supported from the casing for movement between projected and retracted positions. The bolt is spring-biased toward the retracted position and a strike is further provided for stationary mounting on a frame member toward and away from the associated door and casing may swing to the closed and open positions, respectively. A bolt operator is shiftably supported from the casing for shifting between first and second positions and the bolt operator and bolt include coacting portions to positively shift the bolt to its projected position responsive to movement of the operator to its first position.

Abstract: A toggle fastener comprises first and second parts in which the first is a keeper having a cavity. The second part has a bolt slidable therein having a nose adapted to be received in said cavity, and also having hinged thereto a lever on which is pivoted a hasp. The nose of the bolt is adapted to protrude through an opening in the keeper. A cam surface on the nose of the bolt is inclined to the axis of the bolt, and a cam surface on the keeper adjacent to said opening and is opposed to and is inclined oppositely to the cam surface on the nose of the bolt. Said hasp is engageable with both of said cam surfaces in order to cam the keeper and the bolt in opposite directions to prevent rattling.

Abstract: The device comprises a latching assembly enclosed within, and translatable relative to, a centercase housing; the housing is mounted on a chassis. The device is adapted for cooperative engagement with a locking cylinder, for actuating the latching assembly, and for operation of a thumbpiece lift, by an ancillary, external, trim linkage, for translating the latching assembly. The latching device has a master, locking cylinder cam or dowel, the latter having a removable screw, which (through a locking cylinder) either operates a night-latch cam plate, to translate the latching assembly or, upon removal of the screw, allows the cam or dowel to translate a tumbler which, in turn, frees a thumbpiece lift, for operation (then) of the latching assembly by the lift, instead of by the cam plate. Accordingly, with the drive screw in place, the external, operating trim linkage can not operate the device; it must be unlatched, externally, by a key in the locking cylinder.

Abstract: A tamper indicator includes a collar which can be positioned to be circumambient a connection nut on a gas meter. The collar includes two portions which are interlocked by snap-catches which are located inside a locked collar. The collar portions are formed of frangible material and can include lines of weakening. Once in place, the collar cannot be removed without breaking it, and once broken cannot be repaired so that an indication is provided that the encircled connection nut may have been tampered with.

Abstract: In a first embodiment thereof, the locking means comprises an axially-translatable bolt slidably disposed within a cylinder. The cylinder has an axially-extended slot formed therein, and a pin fixed in the bolt projects therefrom, through the slot, to engage a camming slot formed in a sleeve which envelops the cylinder. A hollow cap-actuator envelops the camming-slotted sleeve, and a drive rib formed in the cap-actuator engages an axial separation in the sleeve to cause (a) the sleeve to rotate, when the cap-actuator is turned, (b) to cause the pin to travel along the camming slot, and (c) to effect extension and retraction of the bolt.

Abstract: A rotatable crank hub has a crank arm slot pivotally connected to the rearward ends of a pair of driving levers, the forward ends of the driving levers being pivotally connected to a longitudinally slideable bolt. Rotation of the crank hub in opposite directions moves the bolt through the crank arm and driving levers forwardly to bolt extended position and rearwardly to bolt retracted position during which a transverse driving pin between the crank arm and driving lever rearward ends moves into forward vertical slots of the latch frame in the bolt extended position and into rearward vertical slots of the latch frame in bolt retracted position. A cam projection on the crank hub is slideably resiliently engaged at one side approaching and in bolt extended position and the other side approaching and in bolt retracted position by a forward leg of a U-shaped spring, a spring rearward leg being engaged with the latch frame.

Abstract: A cowling latch for an engine nacelle or the like. The latch characterized by having a collet for engaging a pin extending outwardly from a keeper assembly. The collet when the latch handle is in a closed position secures the pin against the movement of the latch in tension and in shear.

Abstract: A child-proof latch for preventing access by young children to drawers, cabinets and the like.

Abstract: A reinforcing device for use in hollow doors and in conjunction with a lockset. The device includes ribs for spanning the space between opposing inner surfaces of the hollow door for maintaining a predetermined spacing therebetween. Further, the device includes at least a portion for surrounding a retracting mechanism of the lockset and a portion tending to support a retractible bolt.

Abstract: Locking mechanism having a casing including a pair of spaced support plates of similar size and shape. The support plates have identical, spaced, congruent, T-shaped tongues along their front edges. When installed in a door, the tongues extend beyond the edge to engage a strike in the door frame. A pair of bolt members are pivoted in the space between the support plates and are movable between an extended, closed position engaging the strike to a retracted, open position not engaging the strike. A slide rod engages the bolt members and is rotatably and reciprocally journaled between the plates. The slide rod has a transverse arm portion adapted to be connected to one or more manual locking elements in the vehicle door to turn the rod between locked and unlocked mode positions. A slide actuator lever is pivoted to the casing and is engageable with the slide rod arm portion to turn it between locked and unlocked mode positions.

Abstract: Primary and secondary hood latches are used on a tractor hood assembly designed to roll forward on the tractor frame. Both the primary and secondary latches are unlatched through the use of either a cable operated or a lever operated independent linkage means. Both latches must be unlatched in order to allow the hood to be opened while either latch may be used to maintain the hood in a closed position.