Patent US3576177A successfully refreshed from Google Patents.
US3576177A
Expired / Lapsed
US
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Multiple-boiler temperature control system having boiler sequencing, reverse order firing, and individual boiler modulation with outdoor temperature reset
Assignee: Raypak Co Inc
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Filing: 1969-11-10
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Granted: 1971-04-27
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Expires: 1989-11-10
Abstract
Abstract The invention is a multiple-boiler system having N boilers with sequencing control. Each boiler has modulating control by way of control of a gas valve. The boilers are brought on in sequence, or fired in sequence in response to load requirements, each boiler being modulatingly controlled while on. The control is from boiler outlet temperature, reset by outdoor temperature. At predetermined intervals the sequence of firing of boilers is reversed so as to tend to even out the firing time of all boilers. The control system is constructed to accommodate itself to use of commercially available control instrumentalities.
Inventors
- 👤 Leo Block
- 👤 James E Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:37
CPC Classifications
F; F24; F24D; F24D12/00; F24D12/02; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1912; G05D23/1927; G05D23/193; G05D23/1931; F24D2200/00; F24D2200/04; F24D2200/043; F24D2200/16; F24D2200/18; Y; Y02; Y02B; Y02B10/00; Y02B10/70; Y02B30/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
In a temperature control system having a battery of temperature-changing units, in combination, modulating means associated with each temperature-changing unit for controlling its temperature-changing capacity, temperature-responsive means including means responsive to a temperature in a region to be controlled, and means whereby said temperature-responsive means controls the modulating means of all temperature-changing units whereby to variably control the total temperature-changing capacity output of all units to correspond to temperaturechanging load requirements.
Claim 2
Dependent Claim
71 words
In a temperature control system having a battery of temperature-changing units, in combination, modulating means associated with each temperature-changing unit for controlling its temperature-changing capacity, temperature-responsive means including means responsive to a temperature in a region to be controlled, and means whereby said temperature-responsive means controls the modulating means of all temperature-changing units whereby to variably control the total temperature-changing capacity output of all units to correspond to temperaturechanging load requirements.
Claim 3
Dependent Claim
41 words
A system as in claim 1 wherein said control means comprises means whereby to cause each temperature-changing unit to be modulatingly controlled up to a predetermined capacity at which another temperature-changing unit is caused to operate and to be modulatingly controlled.
Claim 4
Dependent Claim
33 words
A system as in claim 1 including means whereby temperature-changing units are caused to be brought into operation in sequence, each successive temperature-changing unit being modulatingly controlled up to a predetermined capacity thereof.
Claim 5
Dependent Claim
25 words
A temperature-changing system as in claim 3 including means whereby at intervals the sequence in which the temperature-changing units are brought into operation is reversed.
Claim 6
Dependent Claim
25 words
A system as in claim 4 including timing means for establishing the intervals at which the sequential order of operation of the units is reversed.
Claim 7
Dependent Claim
43 words
A system as in claim 4, including means forming part of the control means whereby each temperature-changing unit upon being brought into operation is modulatingly controlled up to a predetermined capacity at which the next succeeding temperature control unit is brought into operation.
Claim 8
Dependent Claim
25 words
A system as in claim 1, wherein said temperature control means includes a further temperature-responsive instrumentality responsive to a temperature indicative of changing load requirements.
Claim 9
Dependent Claim
29 words
A system as in claim 3 wherein the control means is constructed whereby individual temperature-changing units continue to be modulatingly controlled after the next succeeding unit is brought on.
Claim 10
Dependent Claim
26 words
A system as in claim 3 wherein the settings at which units are brought into operation are different than settings at which they are turned off.
Claim 11
Dependent Claim
54 words
A system as in claim 3, wherein the control means is constructed to bring on each temperature-changing unit at a predetermined fraction of its capacity whereby to produce a step increase in total capacity, the system being constructed to modulatingly control the units that are on to adjust the total capacity to the demands.
Claim 12
Dependent Claim
23 words
A system as in claim 10, comprising cam-operated control switches which close at individual angular positions and open at different individual angular positions.
Claim 13
Dependent Claim
23 words
A system as in claim 3, wherein the control means are constructed whereby to simultaneously modulatingly control a plurality of the multiple boilers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |