Sensor strip
First Claim
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1. A sensing strip for a movable member having an edge and a drive for said movable member, said sensing element comprising:
- an elongated hollow elastically deformable body extending along said edge;
a support connecting said body to said edge and extending therealong;
a hollow light guide profile formed in said body at a side thereof opposite said support and constituting a leading edge portion with said hollow body, said hollow light guide profile being provided with a slit within said body whereby a light from said light beam traversing said hollow light guide profiles can escape upon spreading of said slit;
a light source generating said light beam at one end of said body directing said light beam into said hollow light guide profiles; and
a light receiver operatively connected to said drive for controlling same and disposed to receive said light beam in an undeformed state of said body, whereby a deformation force applied to said body spreads said slit and reduces light reaching said receiver.
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Accused Products
Abstract
A sensing strip for stopping or reversing the drive of a door or other movable member having an edge along which the hollow light guide profile is provided. The sensing strip has an elongated hollow body connected to the edge of the door by a support and is formed internally with a hollow light guide profile forming the leading edge with the body. This profile has an elongated slit which spreads upon deformation of said body to permit escape of light forming light beam traversing the hollow light guide profile, thereby diminishing the lighting reaching a receiver at an end of the sensing strip.
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Citations
10 Claims
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1. A sensing strip for a movable member having an edge and a drive for said movable member, said sensing element comprising:
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an elongated hollow elastically deformable body extending along said edge; a support connecting said body to said edge and extending therealong; a hollow light guide profile formed in said body at a side thereof opposite said support and constituting a leading edge portion with said hollow body, said hollow light guide profile being provided with a slit within said body whereby a light from said light beam traversing said hollow light guide profiles can escape upon spreading of said slit; a light source generating said light beam at one end of said body directing said light beam into said hollow light guide profiles; and a light receiver operatively connected to said drive for controlling same and disposed to receive said light beam in an undeformed state of said body, whereby a deformation force applied to said body spreads said slit and reduces light reaching said receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification