Hand operated instruments having non-magnetic safety switch

Details Hand operated instruments having non-magnetic safety switch Hand operated instruments having non-magnetic safety switch

1976-06-22

1978-08-08

Scott, James R.

Electricity: circuit makers and breakers

Special application

42 70E, 42 84, 200 42R, 200DIG2, 200157, 63 1R, 340573, H01H 3500, H01H 906, F41C 1912, A44C 1300

Patent

active

041058852

ABSTRACT:
Operator controlled devices in the form of hand operated instruments in which a ring worn by an operator is configured to be insertable into a recess in a hand holdable portion of the instrument. The recess includes a fixed contact configuration that is engagable by a non-magnetic bridging contactor on an outer peripheral face of the ring, so that the instrument becomes operational when the contactor is inserted into the recess and engages the fixed contact configuration.

REFERENCES:
patent: 477940 (1892-06-01), Hurd
patent: 765261 (1904-07-01), Wise
patent: 1029037 (1912-06-01), Young
patent: 1296088 (1919-03-01), Jones
patent: 2223657 (1940-12-01), Baden
patent: 2453190 (1948-11-01), Boscowitz
patent: 2735908 (1956-02-01), Peretti et al.
patent: 2882636 (1959-04-01), Shinaver
patent: 3307374 (1967-03-01), Kirshbaum
patent: 3370137 (1968-02-01), O'Connor
patent: 3531607 (1970-09-01), Donahue et al.
patent: 3571544 (1971-03-01), Sheehan
patent: 3632916 (1972-01-01), Schaad
patent: 3654411 (1972-04-01), Wohnlich et al.
patent: 3673725 (1972-07-01), Cravener
patent: 3750062 (1973-07-01), Goto
patent: 3773990 (1973-11-01), Maci
patent: 3777086 (1973-12-01), Riedo
patent: 3978604 (1976-09-01), Smith
patent: 3983347 (1976-09-01), Brenzen
Johnson, R. A.; IBM Tech. Disc. Bull.; Pushbutton Key With No Moving Parts; vol. 13; No. 11; Apr. 1971, p. 3351.
New World Trnslation of the Holy Scriptures, Book of Genesis, Chapter 4, first verse, p. 12, first revision, 1961.
Washington Post, "Device Could Have Foiled Slaying of D.C. Officer", Lewis et al. Section C, p. 2, Oct. 19, 1976.

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