Heat exchange – Regenerator – Checker brick structure
Patent
1989-11-30
1992-06-09
Ford, John K.
Heat exchange
Regenerator
Checker brick structure
165 26, 165 27, 236 1C, 236 1E, 236 1EA, 236 1EB, 62175, F25B 2900, G05D 2320
Patent
active
051198843
ABSTRACT:
A control device for energizing and de-energizing temperature changing devices having a primary control unit and a secondary control unit is provided. The primary control unit includes means for sensing an external temperature and generating a signal (Ps) having a value proportional to the external temperature, means for generating a set point signal (Psp), representing one end of a predetermined primary temperature range, and means for generating a differential signal (Pd), representing the difference between signal Psp and the other end of the predetermined primary temperature range are included. Additionally, the primary unit includes a primary switch for connecting power to at least one temperature changing device which is opened and closed in response to combinations of signals Ps, Psp and Pd. The secondary unit includes means for generating an offset signal (So) and means for generating a secondary set point signal (Ssp) having a value proportional to a combination of signal Psp and signal So, and representing one end of a predetermined secondary temperature range. The secondary unit further includes means for generating a secondary differential signal (Sd) representing the difference between signal Ssp and the other end of the predetermined secondary temperature range.
REFERENCES:
patent: 3500898 (1970-03-01), Gerhart, Jr. et al.
patent: 3623545 (1971-11-01), Pinckaers
patent: 3797560 (1974-03-01), Zaharoni
patent: 3844475 (1974-10-01), Kesterson et al.
patent: 4313560 (1982-02-01), Stiles
Honeywell, Inc., Honeywell Solid State Remote Temperature Controller T7075A,B, Dec. 1986, Form No. 63-2145, pp. 1-12.
Independent Energy, Inc., Goldline SP-302 Series, Two Stage Temperature Control, PN 222021 Rev D, pp. 1-6, Dec. 1986.
Ford John K.
Johnson Service Company
LandOfFree
Multiple stage electronic temperature control for heating and co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple stage electronic temperature control for heating and co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple stage electronic temperature control for heating and co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1798654