Contact detector for movable objects

Details Contact detector for movable objects Contact detector for movable objects

1989-07-19

1990-08-21

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Stationary feeler detects transient object

H01H 316

Patent

active

049508490

ABSTRACT:
A contact detector for movable objects comprises two opposite circular plates in which a plurality of cylindrical depressed portions are equidistantly opened on the same circumferences from a common center axis of the two circular plates, respectively, a plurality of steel balls, having a diameter larger than the diameter of each depressed portion, inserted into corresponding depressed portions of the two circular plates, and hardened layers formed on the portions in contact with the steel balls of the circular plates by pressurizing two circular plates from the opposite sides of respective depressed portions. A portion of the surface of each steel ball is depressed into each recessed portion, and the one circular plate and the steel balls are pressed into contact with the other circular plate by an elastic member. The contact detector further comprises a switch responsive to displacement of one of the two circular plates, and an arm adapted to be in contact with an external portion of a movable body, which is provided on the other circular plate.

REFERENCES:
patent: 4503297 (1985-03-01), Yagi et al.
IBM Technical Disclosure Bulletin, "Multiposition Z-Axis Actuator for Robot", vol. 29, No. 9, Feb. 1987, pp. 4168-4170.

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