Electronic analog timepiece with rotation detection circuit

Details Electronic analog timepiece with rotation detection circuit Electronic analog timepiece with rotation detection circuit

1982-10-27

1985-01-01

Roskoski, Bernard

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, 318696, G04F 500, G04B 1720

Patent

active

044914245

ABSTRACT:
In an electronic analog timepiece an automatic sequence of events determines the proper magnitude of a detection resistor which is used in series with the motor coil so as to determine whether in normal operation the rotor is rotated or not when driven. A detection resistor is used in series with motor coil but only after a fixed time has passed from initiation of detection current flow. The detection resistor is logically variable and selected automatically in accordance with the motor's mechanical load at the time of switching on the power source or releasing the analog timepiece from a resetting operation. The resistance is formed part of the integrated circuit.

REFERENCES:
patent: 4312059 (1982-01-01), Mandai et al.
patent: 4368990 (1983-01-01), Ueda et al.

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