US1463671A - Automatic draft regulator - Google Patents

Description

July 31, 1923. 1,463,671

V. B.- CARR ET AL AUTOMATIC DRAFT REGULATOR Filed Dec. 8, 1921 ATTORNEYS Patented duly 31, 1923.

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VERNON Bnaoronn cane AND seiviUE finesse: naosnna, or LnBAnor 'innreiva.

AUTOMATIC liners REGULATOR.

Application filed December 8, 1921. Serial No. 520,977.

T all whom it may concern: 1

Be it known that we, VE non B. Cimnand SAMUEL H. BnosHAR, both citizens of the United States, and residents of Lebanon, in the county of Boone and State of Indy ana, have inventeda new and useful improvement in Automatic Draft Regulators,

of which the following is a full, clear, and

exact description. Our invention relates to improvements in automatic draft regulators for furnaces or the like, and it consists in the combinations, constructions and arrangements herein described and claimed. 7 1 An object of our invention is to provide an automatic draft regulator for a furnace which is actuated-by the steam pressure in the boiler. i

A further object of our invention to provide a device of the character described which has adjustable means for automatically keeping 'the'pressure ofQs't'eam in the boiler a predetermined point.

A further object of our invention is to provide a device of the type described, which automatically regulates the opening and closing of the draft door and also the opening and closing of the check draft.

A. further object of our invention is to provide a device of the type described, which is relatively simple in construction and which is not likely to easily get out of order.

Other objects and advantages will appear:

in the following specification, and thenovel pointed out in the appended claim. I Our invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a front elevation of the de vice as shown applied to a furnace, parts of the device being shown in section, and

2 is a sectional view of the device.

In carrying outour invention, we make use of a furnace 1, of ordinary construction, which has a pipe 2 integral with the top thereof. We then provide a casing 3 which has a boss 4 at the lower end thereof and through which the pipe 5 is disposed; The pipe 5 is adapted to extend a short distance into the pipe 2 and thus securely holds the casing 3 to the furnace 1. The casing 3 is divided into two compartments 6 and 7 by means of a centrally disposed partition 8. The partition 8 extends within a spaced distance from the bottom 9 of the casing 3, thus features of the invention will be particularly providing an opening lObetween the compartment 6 and the compartment T. Slidablv disposed in the compartment? is float 11, the float being provided with to a. vertical bifurcated rod 1.2 which is adapted; to extend through an opening 13 in the top 14E of they casing 3. The casing 3 is further providedwith an inlet 15 through which water is; adapted to be poured for a purpose which will he hereinafter dee -ribed. It will be apparent that variation'in the level of the water in thecham'ber 7 will raise or lower the float x .1

The furnacel isprovided with the usual draft regulator 16 and a check draft 1?. The draft 16 and check draft 1? are connected to each other by means of'a cable 18 which is disposed over two pul eys 19 the latter being secured to a transverse beam 20. bar or lever 21 is pivotally mounted on a support 22 and has, one of its ends connected to the cable 18. -The casing 3 carries two guide members 23 in which the bar 21 is slidably disposed. The bar 21 is also disposed in the slot of the rod 12 and is secured thereto by means of a pin 24. It will now be obvious that any movement of the float 11 will actuate the doors 16 and 17. Counterbalanc'e weights 2-5 are slidably disposed on the lever 21. The chamber 7 is further provided with a graduated water tube 26 and is also provided with an air valve 27. v 7

From the foregoing description of the, various parts of the' device, the operation thereof may be readily understood. It will be obvious that any variation of the length of the pipe 5 which extends into the chamber 6 will also vary the level of the water in the chamber. The pipe 5 is in direct communication with the steam boiler 27 of the furnace 1. Assume now that the steam is being generated in theboiler 27'. The steam will rise in the pipe 5 and will pass into the 7 upper portion of the chamber 6 and will force the level of the water in the chamber fidownwardly. The water from the chainher6 will pass through the opening 10 and into the chamber 7, thus raising the float 11, which in turn will swing the lever 21 so as to closethe'door 16 and to open the door 17. It will be observed therefore that a less quantity of air will be admitted into them) furnace 1 and that a greater quantity of air will. be admitted into the smoke. pipe 28,

This will cause the fire in the furnace to die down. The steam pressure in the boiler 27 and the chamber 6 will therefore be low ered and the levels of the water in the charm bers 6 and 7 will resume their normal positions, thus lowering the float 11. The lever 21 will then be swung back to normal position and will open the door 16 and close the door 17.

It will be apparent that this device is automatic in operation and will effectually keep the steam pressure in the boiler 2'? at a predetermined point. It will further be observed that the raising or lowering of the pipe 5 with respect to the chamber 6 will vary the length 01? the stroke of the float ill in the chamber '7, In some types of furn ce's, the doors 16 and 17 have to be swung through a greater are than the doors of other types of furnaces. By merely changing the position of the pipe 5 in the chamber 6, we can readily determine the length of the movement of the float 11, which in turn, regulates the movement of the doors 16 and 17. Therod 12 is provided with a plurality of openings 29 therein, through which the pin can be disposed. This construction provides'a fine adjustment between, the float 11 and the cable 18. The graduated water tube 26 shows at any time what steam pressure there is in the boiler 27, since the variation of the steam pressure in the boiler 27 will raise or lower the level of the water in the tube 26. In the present instance we have graduated the pipe to show a variation of steam pressure in ounces.

, ment, and means operatively connecting said draft and check doors to said float, said means comprising a bifurcated rod supported on said float, said rod having a plurality of spaced apart. holes extending transversely therethrough, a lever pivotally mounted intermediate its length on said casing and having an opening therethrough, a pin arranged to be received in the opening of said lever and in one of the openings in said rod, and cables connected at one end with said lever and with said check and draft doors respectively.

VERNON BEAUFORD CARR. V SAMUEL HERBERT BROSHAR'.

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