Electrical control device for electric motor driven, electricall

Details Electrical control device for electric motor driven, electricall Electrical control device for electric motor driven, electricall

1974-07-01

1976-11-09

Scott, Samuel

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

G05G 900

Patent

active

039903192

ABSTRACT:
An electrical control or operation device for wheelchairs for invalids is provided, the wheelchair being driven and steered electrically. The device comprises two control means, each preferably consisting of two potentiometers, one of the control means controlling the speed forward and backward of the wheelchair, and the other control means controlling the direction of motion of the wheelchair. The two control means may be potentiometers or similar means and can be adjusted individually by one single lever. The body or casing of one of the two control means is fixed to the frame of the control device, and that of the other control means is mechanically connected to the control shaft of the first control means, whereas the control shaft of the second control means is mechanically connected to the lever. At the neutral position of the lever corresponding to zero speed and straight course of the wheelchair, the axes of the lever and of the two said shafts are at substantially right angles each in a different coordinate direction. The device is mounted on the wheelchair such that when moving the lever forward or backward in the longitudinal direction of the chair, the chair will move forward or backward, respectively. Similarly, when moving the lever laterally, the chair will turn into the corresponding direction. The lever may be operated by only two fingers or even by only one finger of the hand, or by the cupped palm thereof.

REFERENCES:
patent: 3779095 (1973-12-01), Audet
patent: 3814199 (1974-06-01), Jones
patent: 3831633 (1974-08-01), Comer

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