Automatic shut-off and alarm for electric heater
US5007103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/395
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An electric heater assembly which provides an alarm warning when an abnormal condition occurs and which simultaneously disables the electrical heating elements is provided. The heater element assembly includes a heating element, an electrically actuated alarm which provides an alarm warning when an abnormal condition occurs, and a tip-over switch which provides a closed circuit when the heater is in a predetermined level position and which provides an open circuit when the heater is tilted beyond a selected tilt angle. The electrical heating element, electrically actuated alarm, and tip-over switch are electrically connected such that the tip-over switch disables the heating element and actuates the alarm when the tip-over switch is in one of the open and closed positions, and such that the tip-over switch enables the heating element and disables the alarm when the tip-over switch is in the other of the open closed positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.