Title: Touch detector for electron applicator

Abstract: The present invention provides a touch detector for preventing collision involving an electron therapy applicator. A sensor is suspended from a cable wrapped on a system of pulley wheels and attached to a spring. By adjusting the configuration and tension of the cable properly with respect to the weight of the sensor, the detector sensitivity can be made reasonably independent of the direction of the detected force as well as the position of the apparatus.

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Inventors: Carter Jr., James C. (San Jose, CA)
Mansfield, Stanley (Santa Clara, CA)

Application Number: 06/191109
Filing Date: 1980-09-26
Publication_date: 1982-07-20
Assignee: VARIAN ASSOCIATES

Primary Class(es): 307/116 200/61.430
Other Classes: A61B6/10; A61N5/01; F16P3/16; F16P3/00; G01N23/00
US Patent Ref:

1240147	September, 1917	Johnston	200/61.57
2946869	July, 1980	Parks et al.	200/61.57	Safety steering wheel and horn blowing means
3053948	September, 1962	Figenshaw	200/61.42	Collision preventer
3325611	June, 1967	Gourley et al.	200/61.39	Safety mechanism for stopping a machine
3330923	July, 1967	Brockmeyer et al.	200/61.43	Safety edge mechanism for doors
3443658	May, 1969	Culp	200/61.44	COLLISION-ACTUATED CIRCUIT BREAKER
3902070	August, 1975	Amor et al.	250/525	Support system for x-ray apparatus
4045631	August, 1977	Dann	200/61.43	Touch-sensitive door control switch
4088856	May, 1978	Tebben	200/52R	Perimeter safety switch mounted to support disposed remote from machine body

Other Refs:
Primary Examiner: Gellner, Michael L.
Assistant Examiner: Dwyer, James L.
Attorney: Cole, Stanley Z.
Nishimura, Keiichi

Claims: