Mobile door closure interrupting detector

Details Mobile door closure interrupting detector Mobile door closure interrupting detector

1985-11-22

1987-01-06

Caldwell, Sr., John W.

Cutlery

340 19R, 340528, 187 29R, 250205, B60Q 100, B66B 300

Patent

active

046350322

ABSTRACT:
The present invention relates to an alarm device for doors in vehicles which is located in a hollow rubber tube and gives alarm as the tube is compressed. The device can be adjusted to be sensitive by placing in one end of the tube a light transmitter and in the other end a light receiver producing a signal which changes according to the light intensity received by the receiver and by compensating slowly occurring changes in said light intensity so that the light intensity of the light transmitter in a corresponding manner is corrected.

REFERENCES:
patent: 3627082 (1971-12-01), Berkovlts
patent: 4069898 (1978-01-01), Tosato et al.
patent: 4406996 (1983-09-01), Oka
"Digital Feedback Light-Emitting Diode Control"; D. C. Thomas, Jr. and W. O. Tyndall, Jr.; I.B.M. Technical Disclosure Bulletin; vol. 16, No. 8, Jan., 1974; pp. 2598-2600.

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