Abstract: A linear locking barrel system for a firearm may include a frame, a slide movably mounted on the frame and defining a barrel channel, a barrel at least partially positioned in the barrel channel of the slide and being movable with respect to the frame and slide along a linear path, and a locking member configured to lock movement of the slide with the barrel for at least a portion of rearward recoil movement of the barrel. The locking member has an engaged condition in which the locking member locks the barrel and slide together and a disengaged condition in which the locking member releases the slide from the barrel during rearward recoil movement.

Abstract: The present disclosure is directed to clutches and pistons used therein. A multi-plate clutch includes a shaft configured to provide rotational movement about a central axis of the clutch, a drum, wherein the drum comprises an inner surface with a plurality of splines formed therein and an opening about the central axis configured to receive the shaft, a plurality of ring-shaped discs configured to engage with the splines and a piston, wherein the piston comprises a plurality of protrusions on an outer circumferential surface of the piston configured to engage with the splines and an opening about the central axis configured to receive the shaft.

Abstract: The present invention relates to a high-voltage transformer coil with acoustic wave guiding function, which comprises a plurality of wound wires, an insulated material for packaging said wound wires to form a coil, a high-voltage connector formed on a side of said coil, and at least one wave guide formed on the other side of said coil to transmit acoustic waves generated due to discharge. The high-voltage coil for transmitting acoustic wave of the present invention is particularly suitable for cast resin transformers.

Abstract: The present invention relates to a simple detector for partial discharge with the acoustic emission technique, which provides essentially with an acoustic emission sensor being set on a power equipment. Still, the output of the acoustic emission sensor is connected with a preamplifier and a bandpass filter in turn and the output of the bandpass fitted up with a comparator. The signals of square waves generated by the comparator can be transmitted to a microprocessor as concurrently as a counter in the microprocessor can be used to count up times for partial discharge by seconds; then, the resulted times can be displayed. Consequently, it is convenient to determine whether the power equipment is necessarily maintained by means of counting up times for partial discharge.

Abstract: A fixture supports and secures a printed circuit board (“PCB”) during processing thereof. The fixture includes a frame for supporting the PCB and an attachable and entirely detachable bar or plate for securing the PCB in the fixture. A first opening is defined by the frame and is of sufficient dimensions to expose a first surface of the PCB. The plate defines a second opening, the second opening being of sufficient dimensions to expose a second surface of the PCB for processing. Spring-loaded latch assemblies connect the bar or plate to the frame at its ends or corners, respectively. The latch assemblies are simultaneously actuated by application of a slight pressure on the plate or bar. Simultaneous actuation of the latch assemblies ensures uniform application of pressure on the PCB, to avoid creation of a moment in the board. The latch assemblies do not require an operator's individual, repeated manipulation, but are actuated with a single application of slight pressure to the plate or bar.

Abstract: A fixture supports and secures a printed circuit board ("PCB") during processing thereof. The fixture includes a frame for supporting the PCB and an attachable and entirely detachable bar or plate for securing the PCB in the fixture. A first opening is defined by the frame and is of sufficient dimensions to expose a first surface of the PCB. The plate defines a second opening, the second opening being of sufficient dimensions to expose a second surface of the PCB for processing. Spring-loaded latch assemblies connect the bar or plate to the frame at its ends or corners, respectively. The latch assemblies are simultaneously actuated by application of a slight pressure on the plate or bar. Simultaneous actuation of the latch assemblies ensures uniform application of pressure on the PCB, to avoid creation of a moment in the board. The latch assemblies do not require an operator's individual, repeated manipulation, but are actuated with a single application of slight pressure to the plate or bar.

Abstract: An adaptor for mounting one instrument, such as an electronic distance measuring device, atop another instrument, such as a telescope or theodolite, for movement together about a horizontal axis with a base member attached to the upper device and presenting two downwardly facing cam surfaces and support members engaging the cam surfaces for vertical movement against springs to counteract the forces produced by the upper instrument as it pivots.

Abstract: An apparatus including a frusto-conically shaped tube for transmitting light with internal reflection surfaces which diverge in the direction from input to output. Incident light from an LED or other substantially phase coherent source is mixed by internal reflection of rays incident at greater than a predetermined angle to minimize the non-uniform phase front and concentrate the beam to permit greater transmitted power. The apparatus finds particular utility in distance measuring instruments in which the output of the tube is directed to an object and the phase of the reflected light compared with the phase of the transmitted light to determine the distance.