GB919294A - Improvements in or relating to automatic electric switches - Google Patents

Improvements in or relating to automatic electric switches

Info

Publication number
GB919294A
GB919294A GB2294160A GB2294160A GB919294A GB 919294 A GB919294 A GB 919294A GB 2294160 A GB2294160 A GB 2294160A GB 2294160 A GB2294160 A GB 2294160A GB 919294 A GB919294 A GB 919294A
Authority
GB
United Kingdom
Prior art keywords
contacts
cam
thermal
blade
bimetal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2294160A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WILHELM GEIGER GES MIT BESCHAN
Original Assignee
WILHELM GEIGER GES MIT BESCHAN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WILHELM GEIGER GES MIT BESCHAN filed Critical WILHELM GEIGER GES MIT BESCHAN
Publication of GB919294A publication Critical patent/GB919294A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/18—Means for adjustment of "on" or "off" operating temperature by varying bias on the thermal element due to a separate spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0214—Hand-held casings
    • H01H9/0228—Line cord switches

Landscapes

  • Control Of Resistance Heating (AREA)
  • Cookers (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

919,294. Thermal switches; cam-operated switches. GEIGER G.m.b.H., W. June 30, 1960 [April 1, 1960]; No. 22941/60. Class 38 (5). A thermal switch moving snap-action contacts by means of a temperature-responsive deformable element has a manually-rotatable control member bearing a face-cam for adjusting the deformable member and a further, concentric, face-cam controlling a further switching device. The switch is connected in the lead of a blanket or other electrical heating appliance, and in the ON position current flows through a bimetal strip 45 in series with its heater coil 47. The bimetal operates a conventional trifurcated snap-action blade and causes contacts 32, 39 to cycle. The operating temperature is adjustable by rotating a knurled disc 21 bearing a facecam in the form of a continuous gradient which bears with variable pressure on a blade 50 and hence, through a pre-set screw 53, on the bimetal 45. At the " hot " end of this cam surface is a " very hot " position in which a cam projection closes contacts 33, 34 to short out the thermal contacts and ensure a continuous current flow to the appliance. The control disc 21 is prevented by a stop from rotating through 360 degrees and at either end of its rotation an OFF position is provided in which a cam projection depresses the adjusting blade 50 sufficiently to hold open the thermal contacts 37, 39, and a further projection opens contacts 17, 25 in the other supply lead, thus providing two-pole switching.
GB2294160A 1960-04-01 1960-06-30 Improvements in or relating to automatic electric switches Expired GB919294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG29360A DE1155841B (en) 1960-04-01 1960-04-01 Electric control switch, especially for electric heaters

Publications (1)

Publication Number Publication Date
GB919294A true GB919294A (en) 1963-02-20

Family

ID=7123720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2294160A Expired GB919294A (en) 1960-04-01 1960-06-30 Improvements in or relating to automatic electric switches

Country Status (2)

Country Link
DE (1) DE1155841B (en)
GB (1) GB919294A (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1852468A (en) * 1930-02-04 1932-04-05 Diamond Electrical Mfg Company Thermostatic switch
US2498127A (en) * 1947-12-01 1950-02-21 Cutler Hammer Inc Thermally responsive switching device
DE871797C (en) * 1949-12-29 1953-03-26 Sunvic Controls Ltd Electric energy regulator
GB748575A (en) * 1953-10-19 1956-05-02 Richard Collier A new or improved thermally-responsive electric heat regulating switch
BE534526A (en) * 1954-01-05
US2813176A (en) * 1956-06-25 1957-11-12 Dole Valve Co Thermostatic control device
US2840667A (en) * 1956-10-15 1958-06-24 Gen Electric Electric switch and thermostat control
FR1186967A (en) * 1957-04-13 1959-09-04 Expl Des Etablissements Irga S Connection method and device for continuous and remote control of the temperature of electric heating bodies, in particular heating pads and blankets

Also Published As

Publication number Publication date
DE1155841B (en) 1963-10-17

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