A cathodically protected storage structure, such as a liquid manure storage tank. The structure comprises a generally cylindrical shell formed of steel plate sections which is mounted on a support or foundation. The steel plate sections are coated with a corrosion resistant material, such as glass, and are bolted together at their overlapping joints. A group of anodes, formed of a metal electropositive to steel, are mounted within the structure, and electrical leads, which are connected to the a...

A pair of transparent prismatic-shaped blocks are mounted within a protective housing which extends through an opening in an armored vehicle for safely viewing an exterior field of view from within the protected vehicle. Each of the blocks has a reflective surface and a viewing surface and are separated from each other by a void. The void is filled with an optical adhesive which remains soft and pliable and which bonds the pair of blocks together in this spaced relationship. The adhesive provide...

Aquatic sports zones are reclaimed or made by bounding non-shore areas of the zone with a plurality of end-to-end connected water impervious flotation boom sections, anchoring the formed boom in the bound zone, and attaching the ends of the boom to pier bulkheads, and providing the boom with a ballasted skirt having a length greater than the maximum normally anticipated water depth at the point of attachment of the skirt to the boom. Where desired, water purification means may be included in the...

A protected bearing mount assembly in which the bearing mount comprises a bearing mounting flange extending from one face of a plate and in which the outer portions of the plate are bent in the same direction as the bearing mounting flange to surround, support and protect the flange together with a cover on the open end of the bearing mount to protect the mounted bearing against the environment to which the bearing mount is exposed.

The well screen assembly disclosed includes a perforated pipe joint having a well screen mounted internally of the pipe joint. The well screen includes a plurality of rods positioned parallel to and spaced from the longitudinal axis of the pipe joint with an elongated wire helically wrapped around the outside of the rods and positioned between the rods and the inside wall of the pipe joint. The wire is wrapped so that the spaces between the wire screen solid particles out of the well fluid as th...

An electronic thermostat is provided with a mounting arrangement between the base means and the cover means that fully protects the electronic components within from both physical and electrical damage during the normal handling of the thermostat. The protection is accomplished by recessing the contact points for the circuitry within openings that can be reached only by mating electrical contacts.

A safety pressure relief device of the rupture disc type includes a molded body rupture disc protected on surfaces exposed to a process line by combining with a protective liner or boot to prevent corrosion and inhibit temperature deterioration of the disc body, binder therein and/or leakage of materials therethrough. The liner, in one form, embraces the otherwise exposed surfaces of the rupture disc in absence of trapped air which is removed when the liner is engaged therewith. An alternate emb...

A switch assembly for a dynamoelectric machine is provided with a protected switch contact for preventing foreign matter from affecting switch contact operation. Preferably, the assembly includes a support. A plurality of electrical connections are attached to the support. The switch assembly functions as an interface permitting connection of an external source of power to the dynamoelectric machine. The protected contact is a part of the start winding circuit and the protective device preferabl...

An overload protected switching regulator for applying power to a load is disclosed. A power switch (PS1, PS2), connected to control the flow of current between the DC input and the output of the regulator, is closed at a fixed rate each time a flip-flop (23, 33) is set by a pulse produced by an oscillator (21, 31). When the regulator is operated at its rated current, or less, an output voltage detector (25, 37) applies a pulse to the reset input of the flip-flop (23, 33) during each period of o...

A battery pack-containing solid state circuit, normally in a standby condition, automatically applies battery-generated power to a multi-power requirement load a predetermined time period subsequent to detection of a malfunction in the load's normal power source. In switching to its power-applying state, the circuit disconnects the load from its malfunctioning power source and energizes the load at a level consistent with the battery pack capabilities. The circuit includes a unique fold-back-cha...