Automatic surveillance system for time sequence operations

Abstract

An automatic system for the surveillance of the incremental speeds of production equipment including a pair of rotary driven gears rotatable about a common axis and in face to face relation. The rotary driven members are independently driven by activating stepping, cocking means including a pulse energized solenoid. An arm laterally movable in response to said pulse extends from a position adjacent the solenoid. Adjacent the forward end of the arm there is a coil spring frictionally maintained in engagement around a shaft and having an extension adapted to be engaged by said arm. A leaf spring is disposed rearwardly of the extension of said coil spring. When the arm moves in response to the pulse it contacts and rotates the coil spring and also moves the leaf spring into taut or cocked position. When the arm is released by the interruption of the pulse the leaf spring is also released as well as the coil spring. The reciprocating action causes the leaf spring to engage the coil spring extension and in then the coil spring to slightly tighten on the shaft to move the shaft one increment. A driving gear carried below the coil spring on the same shaft is thereupon rotated one increment and being in contact with one of the driven rotary gears drives it to the same extent. When a differential in rate of rotation of the rotary gears occurs, sensing means signal such difference to permit the situation to be corrected.