GB2037082A - Bellows-operated devices - Google Patents
Bellows-operated devicesInfo
- Publication number
- GB2037082A GB2037082A GB7940777A GB7940777A GB2037082A GB 2037082 A GB2037082 A GB 2037082A GB 7940777 A GB7940777 A GB 7940777A GB 7940777 A GB7940777 A GB 7940777A GB 2037082 A GB2037082 A GB 2037082A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- pressure
- diaphragm
- operate
- push rod
- 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.)
- Granted
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
- H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
Abstract
Bellows-operated device wherein a pressure to be controlled is applied to the interior of the bellows (30) which operates indirectly a push rod (34) which in turn may operate an electrical switch. In order to render the device fail-safe, the bellows (30) is secured to a pressure pad (32) which contacts a flexible diaphragm (37). The bellows (30) is mounted in a housing (35) which is sealed by the diaphragm (37) which has a larger effective area than the bellows. Leakage of the bellows into the space there-around increases the overall pressure on the diaphragm which therefore tends to operate the push rod (34) to simulate an increase in the pressure being controlled. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5037477 | 1977-12-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2037082A true GB2037082A (en) | 1980-07-02 |
GB2037082B GB2037082B (en) | 1982-04-28 |
Family
ID=10455683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7940777A Expired GB2037082B (en) | 1977-12-02 | 1978-12-01 | Bellows-operated devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2037082B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0113952A1 (en) * | 1982-11-10 | 1984-07-25 | LUCAS INDUSTRIES public limited company | Bellows actuators |
-
1978
- 1978-12-01 GB GB7940777A patent/GB2037082B/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0113952A1 (en) * | 1982-11-10 | 1984-07-25 | LUCAS INDUSTRIES public limited company | Bellows actuators |
Also Published As
Publication number | Publication date |
---|---|
GB2037082B (en) | 1982-04-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931201 |