Abstract: The apparatus comprises a gripping-operating unit including a gripping subassembly, a base subassembly for mounting the components of the unit and an operating subassembly. The gripping subassembly includes a gripper, from which, at one of its vertical extremity, a lever, integral with the gripper, extends horizontally. The base subassembly generally includes an elongated body and a positioning-attachment element connected to the latter. The operating subassembly comprises a spring guide block with opposed channels, a helical compression spring, located in one of the channels, and a pushing pin having a tooth like extension. Should the lever act on the pushing pin, the later, via the tooth like extension, operates against the helical compression spring, and simultaneously moves beyond the spring guide bloc. When a lock is used, a subassembly strike-stopper and a lock actuator-stopper deactivator subassembly are included.

Abstract: A dual-hook locking assembly mounted in a casing subassembly is actuated from outside of the latter by a handle which causes a locking subassembly to operate between an unlocked and a locked position. By rotating the driving handle, a gearing subassembly including a pair of meshed segmental gears drives the locking subassembly between the aforementioned positions. The gearing subassembly and the locking subassembly are directly interconnected. An adjusting subassembly is used for positioning the locking subassembly with respect to a strike plate of a door. The adjusting subassembly comprises several guiding plates. The latter and the gearing subassembly have a common center of rotation.

Abstract: A shelf support bracket for supporting a shelf in a cabinet of the type having a plurality of shelves, the vertical positioning of which is effected by movement of the shelf support brackets, includes a backplate adapted for mounting against a sidewall of said cabinet, the sidewall of the cabinet and the shelf support bracket being constructed and arranged for removably mounting the shelf support bracket on the cabinet sidewall. A shelf support plate projects from a first surface of the backplate and is adapted to receive an edge portion of a shelf. A shelf-retaining structure is affixed to the backplate in a position spaced from the shelf support plate and cooperates therewith to retain the shelf edge portion on the support plate.

Abstract: A latching drop lock for a movable closure member such as a sliding glass window includes a lock body that supports a pivotably mounted, elongated latch element. The lock body and the latch element are slidable as a unit along one side of the movable frame and are slidably engaged in a peripheral channel thereof. The lock body includes a lock bolt element that is insertable in an aperture in the fixed frame to secure the sliding window in a closed position. The elongated latch element includes at one end a detent that is fixedly engageable with the window frame to secure the drop lock in the locked position. The latch element further includes an integral resilient bias spring that urges the lock element rotated about its pivot axis so as to engage the detent whenever the drop lock is slid to the locked position. The latch element further includes manually depressible means operable to disengage the detent and unlatch the drop lock.

Abstract: A lock for a slidable door. The lock comprises an elongate body formed with an open catch compartment. A back plate closes the catch compartment. There is a catch opening in a first side wall of the catch compartment. A pivotable hub is borne by aligned bearing means in the back plate of the catch compartment. A catch is mounted on the hub and is reciprocable with the hub between a lock position from which the catch projects through the catch opening and an unlocked position in which the catch is within the catch compartment. The lock has means to permit selection of the lock or unlock position of the catch and means to maintain the catch in the selected position.

Abstract: A bar spacer for concrete reinforcing bars. The spacer comprises, a foot portion to contact a form for concrete. A bar gripping portion is adapted to grip reinforcing bar for concrete. A plurality of spaced teeth are formed on the internal surface of the bar gripping portion. The teeth are arranged so that each tooth is out of alignment with the tooth next to it whereby each tooth can bend to a position past its neighboring tooth. This ensures that each spacer can grip and locate bars of varying diameter.