Abstract: An improved manually-operable outlet valve for a tank of pressurized gas, especially a tank in a pressurized breathing oxygen system in an aircraft. The valve has a valve body conventionally attachable to a standard oxygen tank. A rotatable valve stem is disposed within a threaded port in the valve body to open and close a poppet valve that mates with a seat machined in the valve body. A torque limiter comprising a stack of Belville washers is disposed between the valve stem and the poppet to prevent over-torque of the valve upon closing of the poppet against the seat. A collar surrounds the stem and rides axially with the valve stem during actuation of the valve. A lever and an electrical microswitch are mounted on the valve body.

Abstract: The present invention relates to an improvement of the conventional sandwiched type saw blade shank by providing, as the intermediate layer, a coated thin sheet with tens of electro-conductive points or a thin sheet with multiple contacts to enhance weldability and to minimize the thermal deform or pressed marks, so that sound absorption, noise reduction and also heat dissipation may be maximized during a high speed cutting operation.

Abstract: A high-precision displacement measurement device and linear or rotational displacement measurement method using a unit displacement sensor based on a confocal theory. This device is simpler in construction, lower in cost and superior in resolution to other displacement measurement devices, and is capable of measuring a much wider area than other measurement equipment. The present device is adapted to project a spot of light from a light source on an object whose displacement is to be measured and measure a relative displacement of the object from a displacement of the projected light spot.

Abstract: Hemorrhoidectomy apparatus comprising an anoscope comprising a generally cylindrical body having a longitudinal axis, said body comprising an open proximal portion and an open distal portion, said proximal portion comprising a generally cylindrical ring from which distally extend a plurality of strips annularly spaced from each other about the longitudinal axis of said body.