Zero energy band subbase for pneumatic thermostats
US4421271A · kind A · utility
26Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1979 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Mar 15, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2365
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pneumatic subbase for modifying the operation of a pneumatic thermostat is disclosed having a first nozzle to be connected to a source of main pressure, a second nozzle for supplying branch output pressure to the device being controlled, a third nozzle connected through the subbase to the first nozzle for supplying main pressure to a thermostat and a fourth nozzle connected to receive the output from the thermostat, the subbase having a dwell relay therein for providing a dwell in the branch output pressure of the second nozzle as a function of the pressure received from the thermostat at the fourth nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.