Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1983-05-25
1985-12-17
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
235144MA, G01R 1164
Patent
active
045594945
ABSTRACT:
A maximum demand meter comprises a driving part for transmitting a rotation depending on a consumed electric energy, a differential gear mechanism comprising a first sun gear rotated by the driving part in a predetermined direction, a second sun gear driven in the opposite direction of the rotation of the first sun gear and a planet gear for transmitting the rotations of the first and second sun gears to a push arm for moving a pointer, a zero-returning driving part for rotating the second sun gear of said differential gear mechanism in a predetermined direction and an engaging pawl means for inhibiting either of the first and second sun gears of the differential gear mechanism from rotating in a predetermined direction. In normal state, the engaging pawl means inhibits the second sun gear from rotation and allows the rotation of the first sun gear to rotate the planet gear thereby to forwardly move the push arm and at a demand time, the engaging pawl means inhibits the first sun gear from the rotation and allows the second sun gear to rotate and the zero-returning driving means drives the second sun gear to rotate the planet gear thereby to return the push arm to the zero position.
REFERENCES:
patent: 1077749 (1913-11-01), Porter
patent: 1138786 (1915-05-01), Porter
patent: 1764340 (1927-08-01), Oman
patent: 3325732 (1967-06-01), Brown
Baker Stephen M.
Levy Stewart J.
Mitsubishi Denki & Kabushiki Kaisha
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