WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1979000337) BELLOWS-OPERATED DEVICES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000337    International Application No.:    PCT/GB1978/000045
Publication Date: 14.06.1979 International Filing Date: 01.12.1978
IPC:
F15B 15/10 (2006.01), H01H 35/26 (2006.01)
Applicants:
Inventors:
Priority Data:
50374/77 02.12.1977 GB
Title (EN) BELLOWS-OPERATED DEVICES
(FR) DISPOSITIF A SOUFFLET
Abstract: front page image
(EN)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 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.
(FR)Un dispositif a soufflet sur lequel on applique a l"interieur du soufflet (30) une pression a controler, pression qui actionne indirectement une tige-poussoir (34) qui a son tour actionne un interrupteur electrique. En vue de rendre le dispositif infaillible, le soufflet est fixe a un patin de pression (32) en contact avec un diaphragme flexible (37). Le soufflet (30) est monte dans un boitier (35) qui est ferme hermetiquement par le diaphragme 137) dont la surface effective est plus grande que celle du soufflet. Une fuite du soufflet dans l"espace environnant augmente la pression sur le diaphragme qui, par consequent, tend a actionner la tige-poussoir (34) pour simuler une augmentation de la pression a controler.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)