Safety strips for closing edges

Details Safety strips for closing edges Safety strips for closing edges

1997-10-10

1999-07-27

Friedhofer, Michael A

Electricity: circuit makers and breakers

Special application

Feeler moves into detecting contact with object

200 6173, 200 85R, 49 27, H01H 316

Patent

active

059294060

ABSTRACT:
A safety strip for use on moving devices with the danger of pinching has a plurality of contact elements assembled into a row under an axial prestress along the safety strip. Extending in these contact elements are electrically conductive contact pins that, in the off, i.e. non-operate state maintain a circuit through the adjacent contact elements by contact and in the event that the safety strip is deformed through some external force open the circuit through the spatial distance from each other. The axial prestress and control of the individual contact elements is effected by means of an elastic tubing. However, in the present state-of-the-art, such safety strips result in a high material load in the area of the contact zones between the individual contact elements and, in addition, have only a limited maintainability. This problem is overcome by generating the prestress through individual tubing pieces that, in alternating sequence, overlay two contact elements and press the overlapping contact elements against each other.

REFERENCES:
patent: 3761658 (1973-09-01), Loose et al.
patent: 3894206 (1975-07-01), Suzuki et al.
patent: 4045631 (1977-08-01), Dann
patent: 4301621 (1981-11-01), Houweling
patent: 4349710 (1982-09-01), Miller
patent: 4987277 (1991-01-01), Duhon

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