Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1976-12-23
1978-04-11
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
99337, 99403, 219437, 219441, H05B 102
Patent
active
RE0296090
ABSTRACT:
The improved operating-safety control uses an operating contactor and a safety contactor each having normally open switch contacts and means connect these switch contacts on opposite sides of and in main power series circuits with the electric heating elements of the cooking apparatus effective for controlling electric input to same. An actuating coil is effective for closing each contactor switch contacts, and the control includes an operating thermostat and a safety thermostat each having a heat sensor in the cooking environment and each having a heat sensor in the cooking environment and each having normally closed contacts opened responsive to a set sensed high temperature. The control connects main on and off switch means operatively in series with a parallel hookup connection of the safety contactor actuating coil as one leg and the serially connected operator contactor actuating coil and operating thermostat controlled contacts as the other leg. Thus actuation of said main on and off switch means effectively opens and/or closes the switch contacts of both contactors. The control further connects the safety thermostat controlled contacts operatively with a power series connection through said mentioned parallel hookup connection and in series with the main on and off switch means and operates responsive to the opening of said contacts for deenergizing the actuating coils of both contactors, and means hold the safety thermostat controlled contacts open until reset means is actuated. A signal device is hooked across the main power input lines at locations between the safety contactor switch contacts and heating elements effective to indicate both a power on condition and a faulted closed condition of the operating and/or safety contactor switch contacts.
REFERENCES:
patent: 2805314 (1957-09-01), Michaelis
patent: 3217633 (1965-11-01), Anetsberger
patent: 3242849 (1966-03-01), Wells
patent: 3410199 (1968-11-01), Quednau
patent: 3720155 (1973-03-01), Fritzsche
patent: 3824373 (1974-07-01), Napier
patent: 3877359 (1975-04-01), Keating
patent: 3911249 (1975-10-01), Keating
Gill Harnek S.
Wadia Gurinder S.
Lind Charles F.
Mayewsky Volodymyr Y.
McGraw-Edison Company
LandOfFree
Electric cooking apparatus with safety control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric cooking apparatus with safety control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric cooking apparatus with safety control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-981077