Abstract: A lid is secured to a housing by a lid latching handle assembly. The handle assembly includes a pair of resilient pads which are compressed against the lid when latched. A pair of locking screws with chamfered shoulders are threaded to the housing and engage a corresponding pair of chamfered holes in the handle to wedge and lock the handle in place as the screws are tightened.

Abstract: A digital phase detector responsive to input signal transitions of first and second input signals for producing output current pulses of first and second polarities dependent upon whether the first input signal leads or lags the second; the width of the output pulses being proportional to the amount of phase lead or lag.The phase detector includes two edge triggered bistable circuits for controlling a tri-state current source which provides positive, negative, or zero current depending upon the respective logical states of the bistable circuits. The detector circuit is arranged so that the bistable circuits are placed in the SET state by signal applied to their respective input terminals, provided both bistable circuits are in the RESET state. Each bistable circuit is RESET by pulses supplied from a respective pulse forming circuit. The pulse forming circuit is conditioned by the bistable circuit it drives to be selectively responsive to the input signal being applied to the other bistable circuit.