Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1985-08-16
1987-04-21
Scott, J. R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
335160, 335170, 335191, H01H 300, H01H 920
Patent
active
046598847
ABSTRACT:
A safety interlock switching device for protecting equipment, which assures the switching-off of the dangerous operating condition in the opened position of the protecting equipment, and comprises a housing, a toggle lever provided with a pivotably mounted locking lever which has two dead center points and has a cam surface which cooperates with a respective cam surface of an actuating element rigidly mounted on the protective hood and insertable into the housing. A switch is provided which actuates the toggle lever. The toggle lever and the switch are positioned in the housing of the switching device. The housing has an insertion opening into which the actuating element is insertable. In one dead center position of the toggle lever, the locking lever and the actuating element interlock with each other, and in the other dead center position the dangerous operating condition is switched off by the switch, and the actuating element with the protective hood are released.
REFERENCES:
patent: 3627960 (1971-12-01), Grabek
patent: 3855432 (1974-12-01), Kelly et al.
patent: 4101745 (1978-07-01), Smith
Letzel Helmut
Scott J. R.
Striker Michael J.
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