Electricity: circuit makers and breakers – Special application – Feeler moves into detecting contact with object
Patent
1979-07-26
1983-01-18
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Feeler moves into detecting contact with object
49 27, 335215, 335219, 365133, H01H 316, H01F 700, E05F 1502, G11C 1100
Patent
active
043693440
ABSTRACT:
A sensitive edge 10 for door systems, lifts, doors, or other moving portions of transit vehicles that come into contact with articles or passengers includes a body defining a resilient deformable leading edge portion 30 and a base portion 32 within which is defined an internal chamber. A coupling portion is defined on and extending from the base for coupling the sensitive edge to the door or similar device 36. The chamber 34 is hollow and at atmospheric pressure and in the preferred embodiment, is filled with air. Within the chamber is mounted a Wiegand wire and pick-up coil 38 that is electrically coupled to a switch for recycling the door or similar device upon engagement of the sensitive edge with an object such as a passenger. Also mounted within the chamber and spaced from the Wiegand wire or pick-up coil and wire is a magnet or similar magnetic field creating device 40 such that upon deformation of the sensitive edge, the magnet and Wiegand wire are brought sufficiently close together to cause a switching function to open the door or similar device.
REFERENCES:
patent: 2476111 (1949-07-01), Opalek
patent: 2493157 (1950-01-01), Merralls et al.
patent: 3303303 (1967-02-01), Miller
patent: 3622926 (1971-11-01), Risk
patent: 3710050 (1973-01-01), Richards
patent: 3820090 (1974-06-01), Wiegand
patent: 3866193 (1975-02-01), Wiegand
patent: 4133365 (1979-01-01), Schleicher
patent: 4199741 (1980-04-01), Paulet
Tapeswitch Corporation of America; Industrial User Catalog C-4; Farmingdale, N.Y.; Date: 12-31-70, 6 pp.
Wigen; Philip E.; "Wiegand Wire: New Material for Magnetic-based Devices", Electronics; Jul. 10, 1975; pp. 100-105.
IBM Tech. Disc. Bull.; R. L. Hollis, Jr.; "Additive Pulses from a Bundle of Internally Stressed Magnetostrictive Wires"; vol. 21, No. 10, Mar. 1979; pp. 4266, 4267.
Canadian Controls & Instrumentation; "Wiegand Pulses Breakthrough Into New Applications", Dec. 1977, pp. 16-19.
Lidd Francis J.
Scott J. R.
Vapor Corporation
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