Threshold adjustable safety edge construction for a motor operat

Details Threshold adjustable safety edge construction for a motor operat Threshold adjustable safety edge construction for a motor operat

1980-10-20

1983-08-02

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Feeler moves into detecting contact with object

H01H 316, 200, 200, 200

Patent

active

043968147

ABSTRACT:
A safety edge switching device for a door wherein a resiliently compressible structure is enclosed by a flexible, impervious sheet covering, and the interior compartment is airtight, forming a pressurized cell, where the pressurization of the cell is user adjustable. A variation of the disclosed invention includes a twin-cell design which provides for additional control uses in safety edge switching functions. Also, a manufacturing method for construction of the invention is disclosed.

REFERENCES:
patent: 3260812 (1966-07-01), Miller
patent: 3303303 (1967-02-01), Miller
patent: 3315050 (1967-04-01), Miller
patent: 3321592 (1967-05-01), Miller
patent: 3462885 (1969-08-01), Miller
patent: 3855733 (1974-12-01), Miller
patent: 3896590 (1975-07-01), Miller
patent: 4051336 (1977-09-01), Miller
patent: 4133167 (1964-05-01), Miller
patent: 4133365 (1979-01-01), Schleicher

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