GB655225A - Improvements in electric short-time switches - Google Patents
Improvements in electric short-time switchesInfo
- Publication number
- GB655225A GB655225A GB2694948A GB2694948A GB655225A GB 655225 A GB655225 A GB 655225A GB 2694948 A GB2694948 A GB 2694948A GB 2694948 A GB2694948 A GB 2694948A GB 655225 A GB655225 A GB 655225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- contacts
- bimetal
- circuit
- price
- 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
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
- H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
- H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
- H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
655,225. Automatic circuit-breakers; thermal switches. PRICE & SON (STAMPERS), Ltd., T., 'and PRICE, E. E. Oct. 16, 1948, No. 26949. [Class 38((v)] A switch adapted to complete a circuit and to be opened automatically at the end of a predetermined time, comprises a bell-crank lever 14 pivoted at 15 and carrying connected contacts 24, 25. The lever is moved clockwise to close contacts 24, 28, by the momentary energization of an electromagnet 18 or by means of a cam acting on the part 16 of the lever, the contacts being held closed by an adjustablypivoted lever 33 which falls down on to a step 22 on the lever 14. Closure of contacts 24, 28 energizes the controlled circuit and also the heater 37 of a bimetal strip 35, which eventually bends up to lift the lever 33 above a step 21 on the lever 14, which is moved counter-clockwise by a spring 17 to open contacts 24, 28 and close 25, 31. The latter reclose the controlled circuit, but not that of heater 37, so that the bimetal cools down and, in bending back to its original position, engages the edge of step 22 and pushes the lever 14 back to its middle position shown, where all contacts are open, thus completing the cycle of operations. An adjustable weight 45 is placed on lever 33 so as to vary the time taken for the bimetal to lift the lever. The switch may be horizontally mounted if the lever 33 is spring-biassed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2694948A GB655225A (en) | 1948-10-16 | 1948-10-16 | Improvements in electric short-time switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2694948A GB655225A (en) | 1948-10-16 | 1948-10-16 | Improvements in electric short-time switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB655225A true GB655225A (en) | 1951-07-11 |
Family
ID=10251737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2694948A Expired GB655225A (en) | 1948-10-16 | 1948-10-16 | Improvements in electric short-time switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB655225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745016A (en) * | 2020-05-27 | 2021-12-03 | 浙江天喜厨电股份有限公司 | Micro-gap switch and have this micro-gap switch's air fryer |
-
1948
- 1948-10-16 GB GB2694948A patent/GB655225A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745016A (en) * | 2020-05-27 | 2021-12-03 | 浙江天喜厨电股份有限公司 | Micro-gap switch and have this micro-gap switch's air fryer |
| CN113745016B (en) * | 2020-05-27 | 2024-01-16 | 浙江天喜厨电股份有限公司 | Micro-gap switch and have this micro-gap switch's air fryer |
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