Abstract: A shunt valve for draining of cerebrospinal fluid comprising a deformable housing having a proximal and distal end. A non-deformable valve chamber is disposed within the housing and such as to form an inlet chamber with the distal end and an outlet chamber with the proximal end. The shunt valve has an inlet into the inlet chamber and an outlet from the outlet chamber. The flow of the fluid within the shunt valve is a Z-flow path and the inlet and outlet are provided along the same axis.

Abstract: A vacuum circuit interrupter comprising an insulated, evacuated, cylindrical housing for a stationary electrode and a movable electrode, with an arc shield provided with a predetermined spacing from and connected to the stationary electrode. The dimensions of the electrodes are asymmetrical with the movable electrode being smaller.

Abstract: A respirometer for determining oxygen demand of respiring liquid is described. The respirometer has a chamber to be filled with the liquid. The chamber includes a base plate, a cover plate, a plurality of supports extending between the base plate and the cover plate, and a side wall made of an oxygen permeable membrane. The cover plate has an opening therein which is capable of supporting a dissolved oxygen probe. The opening also acts as an inlet and outlet to the chamber. A rotor is provided in the chamber for stirring the liquid.

Abstract: A powdered metallurgical procedure for forming chromium copper contacts used in vacuum circuit interrupters, in which prealloyed powder formed by mixing to copper, chromium of between two to thirty-seven weight percent is rapidly solidified after melting at about 1100.degree. C. to 1500.degree. C. This powder may be blended with additional chromium of between 12 to 50 weight percent with a maximum of fifty-five weight percent of chromium in the final contact structure. This blended mixture may then be either (i) cold pressed at 100,000 psig. and vacuum sintered at 800.degree. to 1400.degree. C.; or (ii) be subjected to hot isostatic pressure of 10,000 to 30,000 psig. at between 700.degree. C. to 1080.degree. C.; or (iii) containing the blended copper-chromium powder and the additional chromium powder into an evacuated can and hot extruding the can between 400.degree. C. to 900.degree. C., to form the contacts.

Abstract: This invention relates to a sub surface pressure gauge comprising an axially displaceable drum with a chart disposed within a housing and having a selective axial movement, rotatable stylus for recordal of pressures on said chart provided on said drum. A motor actuates the drum through a programmable switch, the output shaft of said motor providing for linear displaceable movement of the drum controlled by said switch.

Abstract: The inclinometer comprises a single module for measuring the inclination and azimuth of a bore, such as that of an oil well. The single module contains a removable cassette with an inclination measurement means disposed on one side thereof and an azimuth measurement means on the opposite side so as to provide a measurement recording on the substrate of the recording means. An optical assembly is provided within said module for the inclination and azimuth measurement means. Further, a power source is disposed within said module. The module has an inner and outer housing means being provided within said inner housing for providing a rotational movement thereto.In accordance with another embodiment, the inclinometer comprises a first module being a power module for supplying power to the components of the second module.

Abstract: In and for a pressure cooker having an open mouth vessel and a lid which can be sealingly fitted to the mouth of the vessel, a pressure regulating valve fitted to the lid of the vessel comprises a vent tube and a vent weight which vent weight is adapted to be seated over the mouth of the vent tube, said vent tube having a downwardly extending pin to slide into a bore of the head of the vent tube, the vent weight having one or more openings for the escape of the steam when the vent weight is lifted, the vent weight being held by a fulcrumed lever having a passage exposed at one end to the atmosphere and at the other end cooperating with the said openings of the vent weight, the bore or passage of the vent tube being larger in diameter than the said bore or mouth of the vent tube on which the said pin of the vent weight seats, the said pressure regulating valve capable of being manually and automatically operated.