GB1083650A - Thermal protective device - Google Patents
Thermal protective deviceInfo
- Publication number
- GB1083650A GB1083650A GB6505/66A GB650566A GB1083650A GB 1083650 A GB1083650 A GB 1083650A GB 6505/66 A GB6505/66 A GB 6505/66A GB 650566 A GB650566 A GB 650566A GB 1083650 A GB1083650 A GB 1083650A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- contacts
- plunger
- switch
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
- H01H73/30—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
- H01H71/7436—Adjusting the position (or prestrain) of the bimetal
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
1,083,650. Thermal switches. CANADIAN GENERAL ELECTRIC CO. Feb. 15, 1966 [May 15, 1965], No. 6505/66. Heading H2B. In a switch for protecting a motor against overload, a bimetal strip 22 is loosely mounted on a further bimetal strip 27 secured to the wall 18 of a housing 1. The high expansion sides of the two strips is to the left, and strip 22 is loosely connected to a support 28 slidable in the housing to actuate a snap-action switch. Under severe overload, the strip 22 is heated by a heater 12 and its lower end bends to the right to open contacts 72, 74 and close contacts 73, 75. If a plunger 6 is in the position shown, the contacts have to be reset by depression of the plunger, but if the plunger is held depressed by a spring (7), (Fig. 1, not shown), the contacts are automatically reset on cooling of strip 22. In the event of a lesser, prolonged overload, the upper end of strip 27 bends to the right, and strip 22 pivots clockwise about an adjustable stop 45 to move its lower end to the left, thereby effectively delaying actuation of the switch. Ambient temperature compensation may be provided by making switch part 46 of bimetal. The inner walls of compartment 13 may be lined with a heat-reflecting layer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA930773 | 1965-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1083650A true GB1083650A (en) | 1967-09-20 |
Family
ID=4142249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6505/66A Expired GB1083650A (en) | 1965-05-15 | 1966-02-15 | Thermal protective device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3423712A (en) |
| DE (1) | DE1538398C3 (en) |
| GB (1) | GB1083650A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069464A (en) * | 1976-08-19 | 1978-01-17 | Allen-Bradley Company | Bimetal overload relay |
| EP0073742A1 (en) * | 1981-08-31 | 1983-03-09 | Battelle Memorial Institute | Release mechanism for a circuit breaker |
| US6661329B1 (en) * | 2002-06-13 | 2003-12-09 | Eaton Corporation | Adjustable thermal trip assembly for a circuit breaker |
| KR100881365B1 (en) * | 2007-08-07 | 2009-02-02 | 엘에스산전 주식회사 | Trip sensitivity adjusting method for thermal overload protection apparatus |
| KR100905021B1 (en) * | 2007-08-07 | 2009-06-30 | 엘에스산전 주식회사 | Thermal overload trip apparatus and trip sensitivity adjusting method for the same |
| JP4706772B2 (en) * | 2009-03-27 | 2011-06-22 | 富士電機機器制御株式会社 | Thermal overload relay |
| JP4906881B2 (en) * | 2009-03-27 | 2012-03-28 | 富士電機機器制御株式会社 | Thermal overload relay |
| DE102012200544A1 (en) * | 2012-01-16 | 2013-07-18 | Siemens Aktiengesellschaft | Device for adjustment of tip of bimetallic strip in thermal-magnetic trip device of electrical switch i.e. power switch, has actuating unit and deformable legs that are tilted with strip such that tip of strip is able to be adjusted |
| DE102012200546A1 (en) * | 2012-01-16 | 2013-07-18 | Siemens Aktiengesellschaft | Device for adjusting tip position of bimetallic strip of thermal-magnetic trip device for electric power switch, has actuating unit to move plate for tilting tip together with bimetallic strip, during contact of plate and leg portion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH327891A (en) * | 1954-06-08 | 1958-02-15 | Weber Ag Fab Elektro | Circuit breaker with bimetal overcurrent release |
| US2911501A (en) * | 1957-03-25 | 1959-11-03 | King Seeley Corp | Thermally compensated overload device |
| US2978557A (en) * | 1958-02-21 | 1961-04-04 | Mechanical Products Inc | Electric switch incorporating an automatic circuit breaker |
| US3113194A (en) * | 1958-09-11 | 1963-12-03 | Philips Corp | Thermal switch |
| US3038051A (en) * | 1959-08-07 | 1962-06-05 | Gen Electric Canada | Thermal device |
| US3238335A (en) * | 1962-06-05 | 1966-03-01 | Robertshaw Controls Co | Thermal time delay electric switch means having selectively adjustable on and off times |
-
1966
- 1966-02-15 GB GB6505/66A patent/GB1083650A/en not_active Expired
- 1966-03-17 US US535217A patent/US3423712A/en not_active Expired - Lifetime
- 1966-05-13 DE DE1538398A patent/DE1538398C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1538398C3 (en) | 1974-05-16 |
| DE1538398B2 (en) | 1973-10-25 |
| DE1538398A1 (en) | 1969-07-17 |
| US3423712A (en) | 1969-01-21 |
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