Speed adjusting apparatus

Details Speed adjusting apparatus Speed adjusting apparatus

1974-09-17

1976-05-18

Dobeck, Benjamin

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318135, 318302, 318372, G05B 1100

Patent

active

039581667

ABSTRACT:
Means for controlling the speed of the secondary of a linear motor, particularly the shuttle of a linear motor powered loom, consists of a series of uniformly spaced markings on the secondary and a sensor responsive to the markings and located adjacent to the linear motor primary. The markings cause the sensor to produce an oscillating output, the frequency of which is dependent on the speed of the secondary. A control signal derived from the sensor output is used to turn off the supply of current to the linear motor primary when the secondary is travelling at the required speed.

REFERENCES:
patent: 3277357 (1966-10-01), Willis
patent: 3439198 (1969-04-01), Lee
patent: 3513370 (1970-05-01), Pullen
patent: 3699555 (1972-10-01), Du Vall
patent: 3731177 (1973-05-01), Commander et al.
patent: 3735231 (1973-05-01), Sawyer
patent: 3736881 (1973-06-01), Lorinet
patent: 3761790 (1973-09-01), Daab
patent: 3803466 (1974-04-01), Starkey
patent: 3839664 (1974-10-01), Dirks et al.
patent: B368397 (1975-01-01), MacWade et al.

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