Abstract: A Fast Fourier Transform based digital radiometer providing a frequency contiguous set of noise temperature measurements to characterize an atmospheric vertical temperature profile. The radiometer also has Doppler correction to account for velocity of a vehicle on which the radiometer is located and direction changes of a scene being measured.

Abstract: A Fast Fourier Transform based digital radiometer providing a frequency contiguous set of noise temperature measurements to characterize an atmospheric vertical temperature profile. The radiometer also has Doppler correction to account for velocity of a vehicle on which the radiometer is located and direction changes of a scene being measured.

Abstract: A pump has a cylindrical casing, a discoid rotor in the casing having arms each extending in an axial direction from the rotor and sliding over the inner surface of the casing upon rotor rotation, each arm having a flap pivoted at one end to that arm and having its other end slidably engaging a curved surface of an adjacent arm. An inner member freely rotates over an eccentric shaft and is coupled by links to the flaps so that, upon rotation, the flaps pivot towards and away from the casing to effect pumping action. Each arm, flap, link, and the inner member is of constant cross-sectional shape, so that production costs are low.

Abstract: A common control for a community office (C.O.) switching system includes two interactive processors. One of these interactive processors is a call control processor which comprises the uppermost element in the control hierarchy. It is a stored program processor and its functions include: (i) control of call progression, (ii) marking paths through the matrix switch network, and translations. The other of these interactive processors is a port event processor. It is a construction of electronic logic circuitry known as "combinatorial logic". The port event processor operates on the principle of the combinatorial logic being sequentially coupled to every one of the port equipment positions over a 4 millisecond scan cycle. A pair of functional units of the port event processor provide the common control capability to sense or transmit supervisory events.

Abstract: A common control for a community office (C.O.) switching system includes two interactive processors. A call control processor comprises the uppermost element in the control hierarchy and is a stored program processor that controls call progression, marks paths through a matrix switch network, and performs other functions. A port event processor constructed of "combinatorial logic" is sequentially coupled to every port equipment position connected thereto over a four millisecond scan cycle. Interaction between the call control processor and the port event processor is effected through a port data store, which provides an individual port data file per port equipment position. The port event processor also includes timers that respond to call timing information that can be stored in a port data field for controlling the processing of certain signals from the corresponding port equipment position.

Abstract: A central office telephone switching system including two interactive processors, including a call control processor that controls calls by establishing sequences of call progression states, and a port event processor that controls the ports and transmits and receives supervisory information to and from the ports. The port event processor and call control processor communicate through a port data store. The port event processor transfers the received supervisory information to the port data store, for use by the call control processor. The port event processor includes a digital filter that periodically time-samples the received supervisory information and determines the proper state of the received supervisory signal based on the states of the majority of the received sample signals.