GB705213A - Improvements in or relating to thermally responsive electric switches - Google Patents
Improvements in or relating to thermally responsive electric switchesInfo
- Publication number
- GB705213A GB705213A GB24107/51A GB2410751A GB705213A GB 705213 A GB705213 A GB 705213A GB 24107/51 A GB24107/51 A GB 24107/51A GB 2410751 A GB2410751 A GB 2410751A GB 705213 A GB705213 A GB 705213A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- alarm
- operate
- main
- temperature
- 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
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Thermally Actuated Switches (AREA)
Abstract
705,213. Latching thermal switches. IGRANIC ELECTRIC CO., Ltd. Oct. 16, 1951 [Oct. 16, 1950], No. 24107/51. Class 38(5) A switch similar to that of Specification 642,109, [Group XXI], has main contacts 10a, 10b to control the supply of energy to a refrigerator and auxiliary contacts 14a, 14b to control an alarm circuit, a control knob 20 having three main operating positions, i.e. (a) a "normal" position in which the switch mechanism is free to operate the main contacts normally and in additon the alarm or auxiliary contacts in the event of excess temperature, (b) a " continuous run position in which the main contacts are maintained closed and the mechanism is free to operate the alarm contacts and (c) an " alarm off " position in which the mechanism is free to operate the main contacts but not the alarm contacts. In position (a), the main contacts 10a, 10b are opened and closed cyclically by a temperature responsive capsule 12 and snap-action mechanism 11 as described in the Specification referred to above and in the event of a high temperature, a cup 17 on the diaphragm of the capsule moves a lever 16 to close the contacts 14a, 14b. In position (b) a lug 21b engages an extension 11d of a lever 11b of the snap-acting mechanism to latch the lever and prevent the opening of the contacts 10a, 10b as the temperature falls, the contacts 14a, 14b being opened as described above should the temperature rise abnormally. In position (c) a cam member 21a is disposed so as to limit the movement of an adjusting screw 23 extending from the cup 17 to an extent such that the capsule 12 and mechanism 11 can operate the main contacts 10a, 10b, but that the permitted movement of the cup 17 is not suflicient to operate the alarm contacts 14a, 14b. In a modification, Fig. 4a (not shown), the alarm contacts are normally closed and are opened in the event of excess temperature. Reference is also made to U.S.A. Specification 2,511,640.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US190262A US2598563A (en) | 1950-10-16 | 1950-10-16 | Circuit controlling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB705213A true GB705213A (en) | 1954-03-10 |
Family
ID=22700616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24107/51A Expired GB705213A (en) | 1950-10-16 | 1951-10-16 | Improvements in or relating to thermally responsive electric switches |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2598563A (en) |
| GB (1) | GB705213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863269A (en) * | 2017-11-29 | 2018-03-30 | 上海乐研电气有限公司 | A kind of microminiature gas density relay |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2755362A (en) * | 1953-09-10 | 1956-07-17 | Gen Motors Corp | Refrigerating apparatus |
| US2813944A (en) * | 1954-11-12 | 1957-11-19 | Carter Parts Company | Pressure switch |
| US2813176A (en) * | 1956-06-25 | 1957-11-12 | Dole Valve Co | Thermostatic control device |
| US3146329A (en) * | 1960-07-05 | 1964-08-25 | Texas Instruments Inc | Snap-acting electrical switch |
| NL268117A (en) * | 1960-08-23 | |||
| US5585774A (en) * | 1994-09-01 | 1996-12-17 | General Electric Company | Condition-responsive electric switch mechanism |
| US5467523A (en) * | 1994-09-01 | 1995-11-21 | General Electric Company | Method for assembling and calibrating a condition-responsive electric switch mechanism |
| US6252492B1 (en) | 1999-03-18 | 2001-06-26 | James P. Frank | Condition-responsive electric switch mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2447893A (en) * | 1944-08-30 | 1948-08-24 | Philco Corp | Alarm system for electric refrigerators |
-
1950
- 1950-10-16 US US190262A patent/US2598563A/en not_active Expired - Lifetime
-
1951
- 1951-10-16 GB GB24107/51A patent/GB705213A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863269A (en) * | 2017-11-29 | 2018-03-30 | 上海乐研电气有限公司 | A kind of microminiature gas density relay |
Also Published As
| Publication number | Publication date |
|---|---|
| US2598563A (en) | 1952-05-27 |
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