摘要:
Extreme linearity of a film potentiometer is instantaneously obtained by a computerized sectioning method. A circular film potentiometer track is sectioned off for the purposes of trimming the track, the number of sections being determined by the extent of linearity desired. A computerized contact point board programmed to produce a particular linearity for the circular track is then brought into contact with the track. On contact, current begins to flow through the resistance track producing a particular voltage at each sectionalized contact point area thereon. The voltage produced at each contact area, with reference to ground, is instantaneously compared to an electronically generated desired voltage. Every time the voltage across a particular section varies below the standard or desired comparison voltage, a laser beam cuts radially into the potentiometer track until the desired voltage is achieved. The laser beam moves along through each section of the track and the procedure advantageously provides reproducible results therefor, instantaneously.
摘要:
In a potentiometric measuring counter assembly comprising rotary counters corresponding to successive orders of integers, the transfer means from each lower order counter to the next higher order counter is unidirectional to transmit a carry from the lower order counter to the higher order counter but to prevent the higher order counter from operating the lower order counter.
摘要:
A hand-grasped measuring instrument having a plurality of controls all of which are separately and selectively operable by the fingers and thumb of the hand grasping the instrument.
摘要:
A circuit for a programmed automatic measuring device, especially for integrated circuit testers comprising a plurality of input logics for determining the conformity of measured test results with predetermined standards, with two parallel AND gates, one with input negation, and an OR gate with output negation arranged in series with the AND gates; flip-flops in series with the input logics; and means for automatically conforming the test result to the respective standard if the respective test results is not to be evaluated.