Safety edge switch

Details Safety edge switch Safety edge switch

1990-06-29

1991-12-10

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Feeler moves into detecting contact with object

H01H 316, H01H 102, E06B 900, F16P 300

Patent

active

050720805

ABSTRACT:
Safety edge switch for power-actuated devices such as roller gates, roller grilles, lifting platforms and working platforms as well as for securing movable objects and machines having a hollow elastic profile, which exhibits, at least on its inner side, surfaces that are electrically conductive by virture of admixtures of conductive substances, such as carbon black, graphite and metal powder, mutual contact of the electrically conductive surfaces leading to a switching pulse. The hollow body exhibits in the interior at least two strip-like, electrically conductive projections and at least one opposing surface, likewise electrically conductive, guided along the hollow body, by which means contacting between the electrically conductive surfaces is improved. The use of multiple electrically conductive projections insures adequate electrical contact between the conductive projections and the opposed conductive surface even when the operating force is applied from various directions.

REFERENCES:
patent: 4684768 (1987-08-01), Sackmann et al.

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