Abstract: In a spring operated mechanism, the recharge device (1) is adapted to wind the spring (4) during idle times when the drive mechanism (4,16) is not operating. The recharge device has a lever member (48,50) operated by a shape memory alloy member (46) and adapted to turn a gear (8,26) for winding the spring.

Abstract: A strip of copper-based shape memory alloy is used as an actuator element in a restraint/release device (R/R) for a deployment mechanism particularly for space applications; the strip heated by a resistance bends and acts on a lever of a latch means to disengage a moving arm of the R/R device.

Abstract: A rotatable arm carrying an operative member is pivoted on a main housing (10) for movement between a rest position and a work position. A rotary shaft (28) is also journaled in the housing and can be driven by a wound spring (34) for rotary movement, which is transformed into a reciprocating, partial rotation of the arm by a linkage comprising meshing gears (18, 22) on the arm and on a fixed axis, and a crank and slotted link (24, 26, 30) between said shaft and the gears. A first and a second locking units (12, 14) are mounted stationarily with respect to the housing, each comprising a spring-biased pawl (40, 42) to engage the arm when it reaches said rest position and said work position, respectively, and each being releasable by an external control.

Abstract: Apparatus is provided for the automatic in-line measurement of background noise for MTI radar with automatic suppression of samples not originating from noise. The background noise level is determined by making use of summing and shifting operations only, and the suppression of samples not originating from noise is obtained by utilizing the information derived from a normal radar detector so that samples identified as true targets shall not contribute to the calculation of background noise level.The apparatus comprises a multiplexer circuit (22), a first shifting circuit (23), a storage element (24), a second shifting circuit (25), an inverter (21), and a counter (26).

Abstract: A reflector antenna is disclosed which generates two or more beams which are separated angularly in the elevation plane, as in multi-beam antennas, and are shaped so as to provide, when combined, any desired pattern of coverage. The antenna includes a horn which receives separated inputs and radiates toward a reflector primary beams displaced from one another by a predetermined angle but having a single phase center.

Abstract: An integrated radar antenna array consists of a first antenna, in which an exciter is positioned at a focal length of a double curvature reflector with different height and width dimensions to generate a first directional radiation pattern, and a second antenna comprising the reflector of the first antenna and a plurality of micro strip surfaces fitted to the double curvature of the reflector and suitably secured thereon.The radiating micro strip surface is positioned on the reflector at a distance d=K.lambda./2 where .lambda.=wavelength of the exciter frequency and K can be 0,1,2,3 . . . n.