Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1975-06-09
1976-08-31
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335126, 335203, H01H 5020
Patent
active
039784398
ABSTRACT:
A relay comprising a small, flat, rectangular, dielectric housing. A coil mounted in the center of the housing. A U-shaped steel armature at the rear end of the coil having a central arm extending into the coil approximately half way through. A U-shaped steel armature mounted in a teflon slide at the front end of the coil and having a central arm extending into the coil approximately, 0.020 inch from the rear arm. The teflon slide being slidable along the rear armature side arms against the action of a leaf spring. A pair of contact prongs extending from the front of the housing and having integral portions in the housing bent at right angles toward each side and then bent again toward the rear. A movable contact arm extending rearwardly from each inner prong arm toward a rear contact at each rear corner of the housing. The movable contact arms being normally spaced from the rear contacts approximately 0.018 inch. Each contact arm has an enlarged annular portion at the center. Each side of the teflon slide has a teflon roll contacting the annular portions at 45.degree., whereby, when the coil is energized, the front armature will be pulled rearwardly 0.020 inch with the teflon slide and the teflon rolls will cause the contact arms to move outwardly to close the contacts. Conversely, when the coil is then de-energized, the leaf spring will slide the armature into open position opening the contacts.
REFERENCES:
patent: 2929899 (1960-03-01), Filliette
patent: 2951922 (1960-09-01), Myrent et al.
patent: 3568114 (1971-03-01), Cherry et al.
patent: 3828286 (1974-08-01), Bain
Broome Harold
Schwartz Max
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