Circuit for driving a DC motor for a clock

Details Circuit for driving a DC motor for a clock Circuit for driving a DC motor for a clock

1975-01-13

1976-07-27

Jackmon, E. S.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

58 23BA, 318 85, G04C 300, H02P 308

Patent

active

039712044

ABSTRACT:
A circuit for a clock having a time indicating mechanism is connected to regulate the driving of a DC motor by a predetermined amount at predetermined time intervals, so as to actuate the time indicating mechanism without being affected by the variation in the amplitude of the DC energizing voltage available for driving the motor and the variation in the load on the motor. The motor driving circuit has a timing pulse generating circuit for generating timing pulses at the predetermined time intervals, a holding circuit actuated by the timing pulse applied thereto by the timing pulse generating circuit so as to be self-held thus enabling the motor to be energized from the DC energizing voltage, and switching means, connected to the motor or the time indicating mechanism so as to be actuated when the motor is driven by the predetermined amount. The switching means is connected to the holding circuit, so that the holding circuit is deactivated to terminate the self-holding when the switching means is actuated upon completion of the driving of the motor by the predetermined amount, thereby also terminating the energization of the motor from the DC energizing voltage.

REFERENCES:
patent: 3808791 (1974-05-01), Hara
patent: 3830052 (1974-08-01), Daniels et al.

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