Power switching and control mechanism for induction heating apparatus
US3987268A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 25, 1974 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Sep 25, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A first hollow control shaft is rotatable within a housing between actuating and restoring positions with intermediate ON-OFF positions therebetween. A first insulating actuator is rotatable within the housing to operate at least a pair of normally open contacts. A second insulating actuator is slidable along a predetermined path and normally biased to operate normally closed contacts and engageable with the first actuator by a lost motion connection which permits the second actuator to move in a limited range with respect to the rotational movement of the control shaft. The normally closed contacts are placed in a trigger circuit of an induction heating apparatus and the normally open contacts placed in a power supply circuit of the apparatus, the former being operated to disable the trigger circuit prior to energization or de-energization of the power supply circuit. A second control shaft is journaled through the first control shaft. A pinion gear is mounted on the second shaft. A rack is slidable within the housing and engages the pinion. An elevating mechanism is provided on which an induction heating coil of the induction heating apparatus is placed to adjustably heat a utens…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.