Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1978-06-09
1980-05-06
Artis, Henry K.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 18, 200153L, 200153LA, 200153P, 200153LB, 200153S, 200153V, H01H 300
Patent
active
042018994
ABSTRACT:
A power actuator for rotating and reversing a high power radio frequency switch is disclosed. The actuator uses a motor drive and a delay cam means to enable the transmitter's interlock switches to be opened or closed before the radio frequency switch is rotated. A manual drive means is provided to manually rotate the radio frequency switch and the interlock switches if desired. The delay cam includes a first cam means mounted on the shaft which drives the radio frequency switch. A second cam means which rotates freely on the same shaft is driven by a remotely controlled motor. The two cams are engaged, in the first embodiment, by an elongated pin which is fixed in the second cam and extends through an arcuate slot in the first cam. In the second embodiment, the arcuate slot cam means is replaced by a single pin which extends transversely through the first cam means drive shaft. This pin alternately engages at 90.degree. angles the elongated pin fixed in the second cam, and a second arcuately spaced pin also fixed in the second cam. This elongated pin also engages the auxiliary switches which are arranged at either end of its limit of travel. The motor means drives the second cam through a friction clutch. When the motor is energized, the second cam begins to rotate, the elongated pin leaves the first set of auxiliary switches allowing them to go to their normally closed or open state. As it continues to rotate it engages the end of the slot in the first cam and rotates it and the radio frequency switch to its second position. As it reaches the second position, the elongated pin engages a second set of normally open or closed auxiliary switches and closes or opens them as desired in the interlock circuitry.
A reversing circuit for the motor is included to reverse the direction of rotation for the motor each time it is activated.
REFERENCES:
patent: 1491223 (1924-04-01), Casner
patent: 2509928 (1950-05-01), Klein
patent: 3150247 (1964-09-01), White
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