US641655A - Thermostatic regulator. - Google Patents

Description

No. 641,655. Patent'ed 1an. le, |900.

W. G. TAYLOR. THERMOSTATVIC REGULATUR.

(Application filed May 5, 1899.) (No Model.)

'ceoooev WITNESSES INVENTOR NrTEio STATES PATENT OEEICE.

VILLIAM Gr. TAYLOR, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE TAYLOR BURNER AND ELECTRO-PLATING COMPANY, LIMITED, OE SAME PLACE.

THERMOSTATIG REGULATOR.

SPECIFICATION forming part of Letters Patent No. 641,655, dated January 16, 1900.

Application iiled May 5,1899. Serial No. 715,705. (No model.)

To all whom t may concern.-

Be it known that I, WILLIAM Gf. TAYLOR, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Thermostatic Regulators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in whicl1 Figure 1 is a front elevation showing my improved regulator as applied to an ordinary domestic boiler, and Fig. 2 is an enlarged veri tical section of the regulator itself.

lleretofore in the use of thermostats for regulating the gas-supply to water-heaters it has been found extremely difficult to obtain sufficient elongation ot' the rod or thermostatic device to give the requisite motion to the valve, and different complicated systems of multiplying levers and similar devices have been devised for this purpose. My invention does away with these difficulties and provides a thermostat which maybe directly connected to the gas-valve and which by reason of its peculiar location and construction will give the valve its necessary movement and will, moreover, act quickly, when the cold water enters the heater, to open the gas-valve and more slowly and gradually, as the temperature of the water rises, to close the gas-valve.

To that end it consists in placing a thermostat in a water barrel or chamber to which the water-supply pipe leads, the water-barrel having an outlet-pipe leading into the heater at a point remote from the burner or source of heat.

It also consists in locating such thermostat vertically in connecting the gas-valve to its upper end, and, further, in the construction and arrangement of the parts, as hereinafter more fully described, and set forth in the claims.

ln the drawings, 2 represents a domestic boiler, which may be of an ordinary type, with the usual gas-burner 3 below its lower end. The water-supply pipe 4 for the heater leads into the upper portion of the waterbarrel or vertical chamber 5, which is preferably formed of a heavy bronze casting. An inlet-pipe 6 leads from the lower end of this barrel into the boiler or heater. The Water barrel is screwed upon the lower screwthreaded portion 7 of a valve-chamber 8, containing the horizontal bridge. This `valvechamberis interposed in the upper horizontal portion ofthe gas-supply pipe 9, and within the chamber a vertically-moving valve 10 is arranged to seat upon the bridge and close the hole leading therethrough. The stem 11 of this valve fits tightly within a screw-plug 12, which is provided with a small stuftingbox 13, surrounding the outer end of the stem, and the ends of the stuffing-box and the valve-stem are covered by a cap-nut 14.

The thermostat proper consists of a tube 15, of a suitable alloy, which is screwed into the inner portion of the boss 7 and is further secured by hard solder, as shown at 16. Asteel rod 17 is secured to the lower closed end of the tube 15 and extends up through the tube, having screw-threaded engagement at its upper end with the stem of the valve 10. The end of the valve-stem is slotted, as shown, so that a screw-driver may be applied to adjust it upon the steel rod, and the screw connection between the valve and rod is made with an accurate low-pitch thread, so that a very fine adjustment may be obtained. The valve is arranged so that a small endwise movement of the rod will be sufficient to give a requisite amount of gas.

- 18 is the usual pilot-light burner, which is connected to the pipe 9 back of the valvechamber 8, so that it will receive a constant supply of gas, and 19 is a regulating-valve in the pipe 9.

The operation of my improved device is as follows: The water in the boilerl being heated causes an upward circulation in the waterbarrel, and the tube elongating draws down the gas-valve and shuts this valve when the temperature exceeds a certain limit. When hot water is drawn from the heater, the cold water entering the upper end of the waterbarrel will pass downwardly, as shown by the arrows in full lines in Fig. 2. This cold water contacting with the thermostat will shorten it, and thus at once lift the gas-valve and allow gas to pass to the heater. as the house-spigot is shut o the cold water will cease to flow down through the waterbarrel, and an upward circulation will then IOO begin to take place from the heater into the water-barrel, as indicated by the arrows in dotted lines in Fig. 2. The thermostat will thus gradually be elongated and draw down the gas-valve and shut this valve when the temperature of the water in the barrel reaches the desired limit.

The advantages of my invention will be obvious to those skilled in the art since a very simple, cheap, and compact device is obtained which will regulate the gas-valve in the desired manner. The gas-valve will be quickly opened when cold water flows into the heater and will then be slowly and gradually closed as the water becomes heated. The device may be applied to existing boilers and does away with the delicate and costly lever systems heretofore used.

By the expression a single connection between the chamber and the heater in the claims I mean that the chamber is not in a continuous circuit of which the heater forms a part, and of course two or more pipes may be used within the scope of my invention if they lead from the lower portion of the chamber to the heater.

Many variations may be made in the form and arrangement of the regulator without departing from my invention.

I claiml. The combination with a water-heater, of a water barrel or chamber external to the heater and having a single connection therewith at a point remote from the burner, said barrel having a cold-water inlet arranged to be connected to the branch main and located above the connection to the heater, the arrangement of the barrel relatively to the heater being such as to allow hot water to diffuse in the barrel when water is not being drawn from the heater; a thermostatic device in the barrel arranged to be exposed to the entering cold water,and a gas-valve connected to said thermostatic device; substantially as described.

2. The combination with a water-heater, of a vertically-extending water-barrel external thereto and having its lower portion on ly eonnected to the heater at a point remote from the burner, said barrel having a cold-water inlet above the connections to the heater and arranged to be connected to the branch main, the arrangement of the barrel being such as to allow hot water to diffuse thereinto from the heater when water is not being drawn; a thermostatic rod or bar within the barrel, and

a gas-valve connected to said rod; substantially as described.

3. The combination with a water-heater, of a water barrel or chamber external to the heater and having a single connection therewith at a point remote from the burner, said barrel having a cold-water inlet arranged to be connected to the branch main and located above the connection to the heater, the arrangement of the barrel relatively to the heater being such as to allow hot water to diffuse in the barrel when water is not being drawn from the heater; a thermostatic device in the barrel arranged to be exposed to the entering cold Water; a gas-supply pipe extending over the barrel and containing a gasvalve, and a direct connection between the gas-valve and the thermostatic device; substantially as described.

In testimony whereof I have hereunto set my hand.

lV. G. TAYLOR.

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