Heating systems – Automatic control – Water
Patent
1977-01-17
1978-09-26
Camby, John J.
Heating systems
Automatic control
Water
236 91F, 236 91R, 237 8D, F24D 300, G05D 2300
Patent
active
041163800
ABSTRACT:
A device for controlling the heating of a hot water boiler includes a first temperature sensor sensing the temperature of the boiler liquid and operating means adapted to switch a control switch. It also includes an outside temperature sensor to be arranged elsewhere and comprising a liquid-filled reservoir which communicates via a capillary with a tubular coil spring of the control device, which spring also actuates means which are adapted to switch the first switch. The tubular coil spring is arranged to actuate with an outer winding means adapted to change, through this actuation, the relative position of elements of the control switch and hence the temperature at which the control switch is switched under the control of the first temperature sensor. A characteristic feature of this invention is that the outer winding of the tubular coil spring has a plurality of longitudinally spaced coupling elements which can at choice be coupled to one of the means actuated by the outer winding, whereby the effective length of the tubular coil spring can be changed.
REFERENCES:
patent: 1785425 (1930-12-01), Raymond
patent: 1901995 (1933-03-01), Stewart
patent: 2063613 (1936-12-01), McCarthy
patent: 2404596 (1946-07-01), Roche, Jr.
patent: 3044296 (1962-07-01), Boddy
patent: 3076606 (1963-02-01), Garvey et al.
patent: 3530452 (1970-09-01), Keizer
Camby John J.
Eerste Nederlandse Fabriek van Manometers BV
Lavine Irvin A.
Yuen Henry C.
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