摘要:
A butterfly valve and associated controls for controlling the flow of water from a large diameter fire hose to the inlet of a fire pump is disclosed. The valve is installed between the suction tube and the suction tube extension of a midship mounted fire pump on a fire truck in a location such that the valve is positioned behind the pump operator panel. A pressure relief valve and an air bleed are mounted on the body of the valve.
摘要:
The present invention provides electronically conducting polymer films formed from photosensitive formulations of pyrrole and an electron acceptor that have been selectively exposed to UV light, laser light, or electron beams. The formulations may include photoinitiators, flexibilizers, solvents and the like. These solutions can be used in applications including printed circuit boards and through-hole plating and enable direct metallization processes on non-conducting substrates. After forming the conductive polymer patterns, a printed wiring board can be formed by sensitizing the polymer with palladium and electrolytically depositing copper.
摘要:
A device for collecting sebum which is secreted from the sebaceous glands of a subject includes a microporous, hydrophobic polymeric film which is opaque to light when the pores are filled with gaseous material and which is substantially translucent when the film pores are filled with sebum. The film is mounted to a substrate which includes a light absorbing area for enhancing visualization of the film pores when filled with sebum.
摘要:
An engine for a portable engine-pump assembly is designed to operate on a safe fuel such as JP5 or DFM. The engine is started by a starting fuel such as propane which is supplied to the engine from a pressurized propane-containing cartridge. The propane starting system uses a puncturing device which has a built-in check valve function to isolate the propane system from moisture and contaminants in the air.
摘要:
A heterostructure complementary transistor switch (HCTS) is fabricated using epitaxial layers on a substrate to form the desired P-N-P-N (or N-P-N-P) complementary structure in III-V compound semiconductor materials. Two HCTS are formed on a single substrate to form a memory cell. A collector and a base on one of the HCTs are connected to a base and a collector, respectively, on the other HCTS to form the memory cell.
摘要:
An improved gate valve having a body with an inlet into the valve chamber and an outlet from the chamber, a gate in the chamber, a bonnet with an opening therethrough, secured to the body, a stem connected to operate the gate and extending through the bonnet opening, a seat in the bonnet, a shoulder on the stem, heat responsive means holding the stem out of back seating position during normal operation and releasing to back seat responsive to excess heat, body bushing surrounding said inlet and outlet and sealing against the gate, each of the bushings having resilient sealing means and a sealing lip for sealing against a sealing surface on said body.
摘要:
A secure communication system for transmitting and receiving an encoded information signal. The system generates at transmitting and receiving locations a predetermined unique pseudorandom code. A synchronized tracking signal is imposed on the information to be transmitted and added to the information to form an intermediate signal. The pseudorandom code is then multiplied by the intermediate signal directly so that the ultimate result appears to assume the character of pseudorandom noise, which is then transmitted to the receiving location. The synchronization and transmitted encoded portion is decoded at the receiver and used to generate a base signal for a pseudorandom generator at the receiving location, as well as initiate initial clocking pulse time for operation of the receiver pseudorandom generator. The receiver then generates the predetermined pseudorandom code and divides the same against the encoded signal being received to form an intermediate signal having no pseudorandom signal component, which is then filtered to remove the tracking and masking signal and thereby generating the original information signal desired.
摘要:
The exhaust system is located on each nacelle of a tiltrotor aircraft. The exhaust system includes a vector nozzle that is selectively rotatable in relation to each nacelle in order to achieve certain performance objectives. The vector nozzle can be oriented to provide maximum flight performance, reduce infrared (IR) signature, or even to reduce/prevent ground heating.
摘要:
The present invention is related to systems and methods for modifying various non-equidimensional substrates with modifying agents. The system comprises a processing chamber configured for passing the non-equidimensional substrate therethrough, wherein the processing chamber is further configured to accept a treatment mixture into the chamber during movement of the non-equidimensional substrate through the processing chamber. The treatment mixture can comprise of the modifying agent in a carrier medium, wherein the carrier medium is selected from the group consisting of a supercritical fluid, a near-critical fluid, a superheated fluid, a superheated liquid, and a liquefied gas. Thus, the modifying agent can be applied to the non-equidimensional substrate upon contact between the treatment mixture and the non-equidimensional substrate.
摘要:
A medical device comprising a biomaterial formed from a polymer comprising urethane groups, urea groups, or combinations thereof, and sacrificial moieties that preferentially oxidize relative to other moieties in the polymer.