Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1998-01-06
1999-07-13
Friedhofer, Michael A.
Electricity: circuit makers and breakers
Electric switch details
Actuators
2003182, H01H 320, H01H 1300
Patent
active
059213817
ABSTRACT:
A selectively lockable button structure allows for simple and easy mechanical button deactivation and reactivation. The button structure is especially adapted for interface panels of various types of electrical equipment wherein there may be a need for button lockout once the equipment is installed. The button structure includes a button and button retention/housing portion. The button has a head and body with the body terminating in radially outwardly extending flanges that allows easy button installation into the button retention portion of the interface panel but inhibits button removal therefrom. The button retention portion includes angled, diametrically opposed shelves, each shelf of which has a pair of positive lock interference tabs. The button head and the shelves/tabs co-act such that in one rotational position the button is depressible (unlocked) while in another rotational position, the button is not depressible (locked). In the locked position the underside head surface is raised and rests on the shelves, preventing the downward movement of the button upon application of a downward force.
REFERENCES:
patent: 3345489 (1967-10-01), Kemnitz
patent: 3539736 (1970-11-01), Naimer
patent: 3895205 (1975-07-01), Tharp
patent: 4020305 (1977-04-01), Schwartz
patent: 4280026 (1981-07-01), Alessio
patent: 5593022 (1997-01-01), Schaeffer et al.
patent: 5799520 (1998-09-01), Laabs et al.
Friedhofer Michael A.
Watlow Electric Manufacturing Company
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