Running time meter for engine
First Claim
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1. A compact running time meter comprising, in combination:
- a. electronic stopwatch means for recording the period of time said stopwatch is operating,b. vibration sensing means for producing an electrical current when vibration is occurring, andc. switching means for activating said electronic stopwatch means when said vibration sensor means is producing said electrical current.
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Abstract
A compact and inexpensive meter for measuring and recording the time an engine driven apparatus has been running. The apparatus includes a signal generator such as a piezoelectric transducer which produces an electrical current when the engine driven apparatus is operating, a rectifier for converting the electrical current produced by said signal generator to direct current, a transistor for receiving the electrical current from the rectifier and switching on a stopwatch timing unit when the voltage received from the rectifier reaches a predetermined level.
24 Citations
20 Claims
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1. A compact running time meter comprising, in combination:
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a. electronic stopwatch means for recording the period of time said stopwatch is operating, b. vibration sensing means for producing an electrical current when vibration is occurring, and c. switching means for activating said electronic stopwatch means when said vibration sensor means is producing said electrical current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18)
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13. The meter of claim 13 wherein said rectifier means comprises diode means.
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19. A compact running time meter comprising:
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a. electronic stopwatch means for recording the period of time said stopwatch is operating, b. vibration sensing means for producing an electrical current when vibrations is occurring, and c. switching means for activating said electronic stopwatch means when said vibration sensor means is producing said electrical current, said electronic stop watch means, said vibration sensing means, and said switching means being connected together in a composite module connectable to an object which vibrates.
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20. The meter of claim 20 wherein said vibration sensing means has flexible elastic pad means for permitting said composite module to move relative to a vibrating object to which said vibration sensing means is attached.
Specification