Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1988-07-15
1989-07-18
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
74471XY, 338128, H01H 2504, H01C 1016
Patent
active
048495832
ABSTRACT:
A control device for electrical wheelchairs or the like having a manual control lever which is so supported that it can be moved in any direction desired, and is biased into a central neutral position by means of a spring. Two electro-mechanical adjustment elements, e.g., resistors or potentiometers, are provided, the electrical starting values of which are dependent on their mechanical settings. Two mechanical transmission devices each transfer only one of two movements of the control lever in directions essentially perpendicular to one another to the mechanical-electrical adjustment elements. The mechanical transmission devices comprise two plastic plates slidably-disposed one over the other, each containing an inclined elongated slot disposed at right angles to each other. The plates carry projecting studs which actuate said electro-mechanical adjustment elements when the plates move. The lower end of the control lever moves within the elongated slots to move the plates in the desired direction and thus control the operation of the wheelchair through the electro-mechanical elements.
REFERENCES:
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patent: 4559420 (1985-12-01), Yamada
patent: 4590339 (1986-05-01), Scott-Jackson et al.
patent: 4721834 (1988-01-01), Mark et al.
Scott J. R.
Wilhelm Meyer GmbH & Co. KG
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