Pneumatic device to control the speed of an electric motor

Details Pneumatic device to control the speed of an electric motor Pneumatic device to control the speed of an electric motor

1980-05-14

1982-02-16

Smith, Jr., David

Electricity: motive power systems

Three-or-more-positions motor controller systems

Knee- or foot-operated controllers

318345F, 318481, H02P 516

Patent

active

043161308

ABSTRACT:
Device to control the speed of an electric motor from a pneumatic pedal, characterized in that it includes an element deformable with the pressure controlled by the pneumatic pedal, an element of magnetic material forming a mechanical unit with the element deformable with the pressure and capable of modifying the inductance of a coil incorporated into an electronic control circuit for the current of the electric motor the speed of which is to be controlled.

REFERENCES:
patent: 2980837 (1961-04-01), Wu
patent: 3469164 (1969-09-01), Truemper et al.
patent: 3509485 (1970-04-01), Czerny
patent: 3555405 (1971-01-01), Martin
patent: 3593086 (1971-07-01), Thombs
patent: 3735244 (1973-05-01), Gumtau et al.
patent: 3818292 (1974-06-01), Berman
patent: 3848180 (1974-01-01), Jonice et al.
patent: 4624484 (1977-05-01), Tomczak et al.

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