Abstract: An electric cylindrical lock comprises a chassis, an inner spindle, an inner handle, a latch assembly, an outer handle, and an outer spindle. A tubular seat is mounted around an end of the outer spindle and includes a positioning groove aligned with a slot of the outer spindle. When a solenoid mounted in the tubular seat is energized, a protrusion of a locking plate in the tubular seat is engaged in the positioning groove of the tubular seat to thereby prevent rotation of the outer handle. When the solenoid is inoperable, the lock cylinder is turnable by a key to cause longitudinal movement of the locking plate, thereby disengaging the protrusion of the locking plate from the positioning groove of the tubular seat.

Abstract: Apparatus (10) having special application for gripping and cutting tree limbs around utility lines includes a tubular insert (18) slideably received in the free end of a tubular boom (12). A plate (28) is pivoted about a first pivot axis relative to the insert (18) by a linearly extendable actuator (36) mounted within the insert (18) and mounts a first rotary actuator (38). A second rotary actuator (58) is mounted to a U-shaped mount (48) which is pivoted about a second pivot axis to the first rotary actuator (38) and rotates a working head (96) 360° about a third pivot axis. Gripping arms (78) are fixed to shafts (74) rotatably mounted in the working head (96) about axes perpendicular to the third axis, with the shafts (74) being rotated by a single linearly extendable actuator (82) extending between crank arms (80) fixed to the shafts (74). The crank arms (80) abut with an abutment (84) to prevent only one set of gripping arms (78) from moving.

Abstract: A foldable massaging mattress is disclosed. The massaging mattress includes a mattress body having a protruding pillow portion at an end thereof and a track having a first end and a second end. The track is arranged in the mattress body and extends in the longitudinal midway of the mattress body. The track has at least two sections pivotally connected with each other. A gear case is arranged in the protruding pillow portion of the mattress body in a location adjacent to the first end of the track. A sprocket case is arranged in the mattress body in a location adjacent to the second end of the track. A DC motor is included for driving the gear case. A carriage has opposed two ends and is movable along the track. A chain runs between the gear and sprocket cases and has two ends attached to the opposed two ends of the carriage. The chain is driven by the gear case.

Abstract: A drawer fastening device is disposed on a drawer. The drawer fastening device has a lock device, a connection plate, a slide plate, a plurality of hooking plates, a plurality of pivot pins, and a positioning frame. The positioning frame has a plurality of slide slots and a plurality of enlarged holes. The slide plate has an upper end groove and a plurality of through holes. Each hooking plate has an upper distal hook and a lower blocking bar. Each pivot pin fastens the positioning frame, the hooking plate and the slide plate together. The lock device has a positioning seat, a driven plate connected to the positioning seat, and a mount connected to the driven plate. The connection plate is fastened in the mount pivotally and the connection plate is connected to the driven plate. The slide plate is connected to the connection plate.

Abstract: A device for adjusting lateral position of a chair armrest relative to a chair seat comprises a base securely attached to the chair seat and having a number of positioning holes, an extension extended from an armrest of the chair and slidably received in the base along a lateral direction relative to the seat, and a positioning member including an intermediate portion pivotally attached to the extension, a first operative end, and a second end releasably engaged with at least one of the positioning holes. A mounting member is mounted to the underside of the positioning member and has a stub extended through a through-hole in the intermediate portion of the positioning member. A bolt is extended through the stub and engaged with the extension, thereby pivotally mounting the positioning member between the extension and the mounting member.

Abstract: A jack has a first oil cylinder, an inner cylinder disposed in the first oil cylinder, an upper cover covering the first oil cylinder and the inner cylinder, a piston and a piston rod inserted in the inner cylinder, the piston connected to the piston rod, the piston rod passing through the upper cover, an extended plate extending from the upper cover, a collar disposed on a bottom of the extended plate, a second oil cylinder inserted through the collar, the second oil cylinder having a lower enlarged neck, a push rod inserted through the second oil cylinder, an arm plate connected to the collar, a retainer connected to the push rod, a lever fastening a connector and the retainer together, and a handle rod connected to the connector. The connector has a slot for receiving the arm plate. A pivot pin fastens the connector and the are plate together.

Abstract: A transmission assembly has a frame having a through hole, a transmission gear, a driven gear, and a transmission chain surrounding the transmission gear and the driven gear. A torsion spring has a first end and a second end. A swing arm has a round hole, a circular hole, and a through aperture. A shaft rod is inserted in the round hole of the swing arm. The shaft rod passes through the torsion spring and the through hole of the frame. An idle wheel engages with the transmission chain. A bearing is adjacent to the idle wheel. The pivot rod is inserted in the circular hole of the swing arm. The pivot rod passes through the ring and the idle wheel. The first end of the torsion spring is inserted in the through aperture of the swing arm. The second end of the torsion spring is hooked on the frame.

Abstract: A decorative light plug has an female connector integrally formed on the decorative light and having a flange formed on an outer periphery of the female connector and a cover having a blind hole defined to enclose a distal end of the decorative light and a pair of L-shaped keyways formed to correspond to a pair of keys formed on the outer periphery of the female connector. After the distal end of the decorative light is inserted into the blind hole of the cover, rotation of the cover will secure the engagement between the cover and the decorative light.

Abstract: A control switch assembly for an air pump has a unidirectional valve mounted inside a port that is mounted together with a contact device on an actuation device. The actuation device has an extension slidably received in the actuation device and controllably connected to a knob. With the movement of the extension, a switch inside the contact device is able to selectively make an electrical connection and an actuating pin of the unidirectional valve is able to selectively open an airway inside the port. When the electrical connection of the switch is disconnected and the airway is opened by the movement of the actuating pin, the pressure above a diaphragm and inside the compressor is able to be released from the airway of the port so as to smooth the actuation of the compressor.

Abstract: An armrest assembly includes a tube secured to a chair seat and an adjusting seat mounted in the tube. An actuating member includes a vertical section slidably received in a longitudinal groove of the adjusting seat. A slide member is slidably attached to the vertical portion of the actuating member to move therewith. An armrest is securely mounted to the actuating member to move therewith. An operative member is securely attached to the slide member for manual operation. Two positioning members are respectively, releasably engaged with two sets of vertically spaced positioning notches in the adjusting seat under the control of the slide member that is moved by the operative member.

Abstract: A pinwheel assembly has a main shaft, a plurality of curved rods, a first rotating wheel, a second rotating wheel, a third rotating wheel, a fourth rotating wheel, and a plurality of fabric vanes. The main shaft passes through the first rotating wheel, the second rotating wheel, the third rotating wheel, and the fourth rotating wheel. Each of the curved rods is connected to the first rotating wheel and the fourth rotating wheel. Each of the fabric vanes is connected to the second rotating wheel and the third rotating wheel.

Abstract: A pinwheel assembly has a polygonal main body, and a rotating device disposed in a center of the polygonal main body. The rotating device has a bearing and a hollow shaft. A plurality of support rods are connected to the bearing. The hollow shaft is inserted through the bearing. The polygonal main body has a plurality of diagonal lines. A plurality of through holes are formed on the diagonal lines of the polygonal main body. A plurality of triangular vanes are disposed on the polygonal main body. Each triangular vane has a triangular end bag. Each support rod is inserted in the corresponding triangular end bag and inserted through the corresponding through hole of the polygonal main body.

Abstract: A bicycle tire pump includes a cylinder having two passages defined therethrough which are separated by a board, two openings respectively defined in a top of the cylinder and communicating with the two passages into which two pistons are respectively and movably received. A head is mounted to the top of the cylinder and has two ways defined therein which respectively communicate with the two passages in the cylinder and an outlet of the head. A bolt extends through one of the two passages and is threadedly connected to the head. The bolt has a longitudinal passage defined therethrough which communicates with one of the two ways.