This invention is directed to a punch-through reference diode comprising a first semiconductor region of a first conductivity type which is formed within a semiconductor body; a second semiconductor region of a second conductivity type which is formed within the semiconductor body, the second semiconductor region adjoining the first semiconductor region and defining a first PN-junction with the first semiconductor region; and a third semiconductor region of the first conductivity type which is f...

The invention contemplates lead-through structure for the high-voltage electrode of an electron microscope or the like, in conjunction with shaping of the high-voltage electrode and of the body of insulating material via which the lead-through is supported, in reference to metal envelope structure. The high-voltage electrode has a step-wise enlargement, and the surface of the insulating material which is exposed to the vacuum commences at the start of the step-wise enlargement. As a result, the ...

A porous material is printed with a sublimable dyestuff designed to achieve substantial pattern depth penetration. After the porous fabric has been printed it is consolidated by compression and fusion to a desired degree. This then provides a product which has a through color printed effect.

Flow-through chambers, such as drip or expansion chambers, which are intended to form part of a duct for blood or other such sensitive fluids, are disclosed. The chambers include a housing, an inlet, an outlet, and a flow directing portion of the housing for directing the flow of the fluid from the inlet to the outlet. The flow directing portion of the housing is formed in a manner so as to deflect the flow of the fluid from the inlet towards the outlet in a gradual manner so as to protect the f...

A water sport apparatus which can be attached to an inner tube and includes a flexible seat that can be strapped to the inner tube and a pair of extending portions that pass over the inner tube and are connected to a tow line.

A method and apparatus for separately introducing an auxiliary feedfluid into a shell and tube type vapor generator when the flow of main feedfluid is discontinued. The auxiliary feedfluid provides the vapor for preheating the entering main feedfluid when flow of the latter is resumed thereby reducing temperature differentials between the shell and tube sheet metal and the entering main feedfluid so as to eliminate thermal shock.

A slip-through buckle for a semi-flexible non-expansible and non-resilient watch band in which a boss in the base of the buckle frame is adapted to be received in one of a number of spaced notches in the underside of the tongue end of the band and in which a resilient clamping plate retained on the frame and overlying the tongue end of the band and which is urged into engagement with the upper side of the tongue end of the band by cams as the cover of the buckle is closed may flex to accommodate...

This invention is directed at a drawn-arc welding gun with means for providing a rotary flow of air, or stream of fluid, around the weld area. This invention is also directed at ferrules which are designed to enhance movement of air or fluid around the weld area.

A flow through marine propeller unit with exhaust creepage barrier structure at the rear of the hub formed of an middle unit. protrusion projecting radially outwardly to define a forwardly oriented dead end pocket.

The specification describes a reciprocating piston pump for manual or power driven operation. It comprises a piston, a cylinder for the piston, a piston tube carrying the piston and valves adjacent to an outer end of the piston tube ad to the other end of the pump for regulating flow through the pump. The valves are provided with means for operating them by mechanical friction on relative movement taking place between the piston tube and the cylinder.