GB805410A - Improvements in or relating to thermally-actuated electric switches - Google Patents
Improvements in or relating to thermally-actuated electric switchesInfo
- Publication number
- GB805410A GB805410A GB39619/56A GB3961956A GB805410A GB 805410 A GB805410 A GB 805410A GB 39619/56 A GB39619/56 A GB 39619/56A GB 3961956 A GB3961956 A GB 3961956A GB 805410 A GB805410 A GB 805410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bimetal
- cam
- contacts
- terminal
- strip
- 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
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
- H05B1/0213—Switches using bimetallic elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
805,410. Thermal switches; cam-operated switches. BRYANT ELECTRIC CO. Dec. 31, 1956 [Jan. 3, 1956], No. 39619/56. Class 38 (5). The switch comprises a bimetal strip fixed at one end and having its other end co-operating with a fixed contact, spring means mechanically connected with the bimetal and manual means movable from an " off " position to move the spring means a variable amount and to close the contacts, the bimetal being heated by the current through the circuit thus completed. In one form, Figs. 2, 3, the bimetal 54 is mounted on a terminal 56 and carries a contact 58 co-operating with a contact 72 on a composite bimetal strip 66 mounted on a terminal 64. The bimetal 54 is connected by a strip 62 to an ambient temperature compensating bimetal 60 mounted on a lever 76 pivoted at 74 and biased clockwise (Fig. 2) by a spring 80. The lever 76 has an adjusting screw 95 co-operating with a manually-adjustable cam 26 having a projection 52 which in the off " position shown, separates spring blades 14, 16, which are carried by a terminal 10, from terminals 4, 6. In the " off position, the lever 76 engages a lateral projection on the strip 62 to hold contacts 58, 72 open. As the cam is rotated, contacts 4, 6, 14, 16 close, and the lever 76 and bimetal 60 move upwards, Fig. 2, to close contacts 58, 72. The bimetal 66 has two parts 68, 70 which bend down and up, respectively, when heated, and which are in series with the load which is connected between terminals 10 and 64. Thus, as bimetal 66 is heated it tends to increase the contact pressure until the bimetal 54 overcomes the pressure imparted to it via bimetal 60 by the cam 26, and opens the contacts. The bimetals then cool down and the contacts reclose, and the switch cycles on and off. The line terminals are 4, 56, and terminal 6 is connected to the neutral via a pilot lamp. In a modification, Fig. 4, the movements of the bimetals 541, 601 and the strip 62<SP>1</SP> are controlled by a snap-acting spring 222, the contact 58<SP>1</SP> on the bimetal co-operating with a fixed contact 72<SP>1</SP>. The springs 14<SP>1</SP>, 16<SP>1</SP> are carried respectively by terminals 4<SP>1</SP>, 6<SP>1</SP> and co-operate with terminal 101, the springs having projections 212, cooperating with the face of cam 26<SP>1</SP> which has recesses 214 in the " off position. The edge of the cam engages an arm 230 secured to a member 228 carrying the bimetal 60<SP>1</SP>. The bimetal 54<SP>1</SP> is heated by the current through it and by a coil 224.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US556953A US2870290A (en) | 1956-01-03 | 1956-01-03 | Wiring device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB805410A true GB805410A (en) | 1958-12-03 |
Family
ID=24223489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB39619/56A Expired GB805410A (en) | 1956-01-03 | 1956-12-31 | Improvements in or relating to thermally-actuated electric switches |
Country Status (2)
Country | Link |
---|---|
US (1) | US2870290A (en) |
GB (1) | GB805410A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3083282A (en) * | 1959-07-13 | 1963-03-26 | Stevens Mfg Co Inc | Infinite control switch |
US3082305A (en) * | 1959-07-31 | 1963-03-19 | Proctor Silex Corp | Thermal switch construction and system |
DE1275705B (en) * | 1961-06-02 | 1968-08-22 | Busch Jaeger Duerener Metall | Temperature switch |
US3688060A (en) * | 1970-08-24 | 1972-08-29 | Texas Instruments Inc | Electrical switch means for effecting sequential operation |
US3863185A (en) * | 1973-12-17 | 1975-01-28 | Robertshaw Controls Co | Thermal beam actuated electrical sequencer |
US3905003A (en) * | 1974-01-28 | 1975-09-09 | Robertshaw Controls Co | Electrical switch construction and parts therefor |
CA2369527C (en) * | 2001-01-31 | 2005-01-04 | Robertshaw Controls Company | Switching system for plural simmer voltages |
US11566793B2 (en) | 2015-01-20 | 2023-01-31 | Robertshaw Controls Company | Electro-mechanical energy regulator providing enhanced simmer performance |
US11810741B2 (en) | 2020-11-09 | 2023-11-07 | Robertshaw Controls Company | Increased push travel alternative for energy regulator |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1716041A (en) * | 1926-07-30 | 1929-06-04 | R M Hvid | Safety switch plug |
US1749718A (en) * | 1926-12-13 | 1930-03-04 | Edison Electric Appliance Co | Electric supply system |
US1916671A (en) * | 1930-06-16 | 1933-07-04 | American Electrical Heater Co | Thermostat |
US2131640A (en) * | 1934-01-08 | 1938-09-27 | Colt S Mfg Co | Automatic circuit breaker |
US2338474A (en) * | 1940-12-04 | 1944-01-04 | Metals & Controls Corp | Thermostat |
US2520874A (en) * | 1942-10-19 | 1950-08-29 | Fasco Industries | Manually operable thermostatic switch assembly |
US2427945A (en) * | 1942-12-05 | 1947-09-23 | Westinghouse Electric Corp | Electric hot plate with vesseltemperature control |
US2585068A (en) * | 1947-02-28 | 1952-02-12 | Morris B Wood | Electrical circuit breaker |
US2498127A (en) * | 1947-12-01 | 1950-02-21 | Cutler Hammer Inc | Thermally responsive switching device |
US2593268A (en) * | 1948-07-20 | 1952-04-15 | Gen Motors Corp | Single-phase motor control |
US2623137A (en) * | 1950-04-25 | 1952-12-23 | Proctor Electric Co | Electric switch |
US2685636A (en) * | 1951-10-08 | 1954-08-03 | Proctor Electric Co | Electric heating unit control |
-
1956
- 1956-01-03 US US556953A patent/US2870290A/en not_active Expired - Lifetime
- 1956-12-31 GB GB39619/56A patent/GB805410A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2870290A (en) | 1959-01-20 |
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