GB751449A - Apparatus for supervising the operation of driving motors of stationary or movable machines - Google Patents

Abstract

751,449. Registering running time of machines. LEHMANN, E. Aug. 16,1954, No. 23836/54. Class 106 (4). Apparatus for registering the running time of a motor comprises a pendulum 2 operating a counter mechanism drive through a ball click and ratchet wheel, the drive including a driving member 20 secured to a helical spring 21 serving as a slipping clutch and frictionally connected to a driven member 23. When the motor in a stationary or movable machine is running, vibrations cause the pendulum 2, whose weight is supported by a spring 9, to oscillate between stops 10, 11. At each upward stroke of the pendulum 2 a disc 124 secured to a bush 13 carrying a gear-wheel 14 is advanced through ball-andratchet-wheel, reverse movement on the downward stroke being inhibited by balls 123 cooperating with ratchet plate 127. This intermittent drive to the wheel 14 is transmitted to a gear-wheel 20 to which is connected a helical spring 21 which is wound with pre-tension on the end of a shaft 23 of clockwork having a balance spring, but no main spring. The force exerted by the wheel 20 on the spring 21 tends to uncouple it from the shaft 23 so that it acts as a slipping clutch. The clock is thus driven only during the running of the motor and may indicate the running time per shift while.a counter 6 is driven through a worm-shaft and drive 27, 28 to register total running time. A signal may be given when a regular overhaul or service is required.