US2269848A - Control apparatus for oil burners - Google Patents

Description

Jan. 13,1942 K. FRENCH 2,269,848

CONTROL APPARATUS FOR OIL BURNERS Filed May 2, 1940 lul @a g hvnndh French.

Patented Jan. 13, 1942 UNITED STATES PATENT OFFICE 2,269,843 CONTROL APPARATUS FOR OIL BURNERS Kenneth French, Waterbury, Conn.

Application lMay 2, 1940, Serial No. 332,999

(ci. s- 28) 1 Claim.

This invention relates to oil burner controls, and more particularly to an improved apparatus for automatically controlling the flow of oil from a supply tank to an oil burner.

The control apparatus of this invention is primarily designed for use with oil burners of the Itype wherein a pilot light is kept burning conthe desired low fire and a thermostatically and electromagnetically controlled main valve for producing the operation of the high re when needed.

A still further object of this invention is to provide an improved control apparatus for oil burners of the above nature which will be relatively inexpensive to manufacture, simple in construction, compact, ornamental in appearance, and very eicient and durable in use.

With these and other objects in view, which will appear as the description proceeds, there has been illustrated in the accompanying drawing one form in which the invention maybe conveniently embodied in practice.

In the drawing:

Fig. 1 is a schematic layout of an oil burner system showing the disposition of the control apparatus of thisinvention in relation to an oil burner and a source of fuel supply.

Fig. 2 is a top plan view of the improved control apparatuswith the protecting cover shown necting the supplytank I0 directly. to the oil burner mechanism II as is usual in oil burner installations, an intermediate fuel reservoir I1 is located therebetween, said reservoir I1 being connected to said tank Ill by a pipe I3. The switch I2 is electrically connected to a line wire L' by a conductor I5, yand the burner II isconnected to a line wire L2 by a conductor I6. Any suitable standard mechanism (not shown) may be employed to maintain the fuel level in the reservoir I1 at a point above the inlets to the needle valves.,4 f

The fuel reservoir I1 has a threaded fuel inlet connector I8 upon which a threaded collar on the end of the pipe I3 is adapted to be screwed, and an outlet I9 is provided which is connected to the oil burner valves by a pipe 20. Thereserf voir I1 is shown mounted on a vertical standard 2| so that the reservoir may be elevated above the burner II. A low fire or pilot control valve 23 is disposed in the reservoir I1 below the fuel level 22, and includes a valve seat 24 disposed between an inlet port 25 covered by a screen 26 and an outlet port 21. A needle valve stem 2B, screw threaded into a boss 29 extending upwardly Ffrom the valve 23, passes through a. stuiiing box l3i) and then upwardly through va flat cover.3I provided for the reservoir I1. Above the cover 3l the valve stem 28 has a thumb knob 32 secured thereto, upon which is provided a pointer 33 adapted to be moved over a circular dial 34 providedl on the cover 3| to visually indicate the position of the valve 23.

The outlet port 21 of the valve 23 is connected -through an integral tubular portion-35 to an outlet port 36, provided in a vertical valve body 31, and which is in .connection with the reservoir outlet I9. The tubular portion 35, in this instance, is shown screw threaded, as at 38, into the valve body 31, and the latter extends-from'the cover 3| to the bottom 39 of the reservoir, and is secured to each by nutsdll and 4I respectively screwed upon upper and lower screw threaded ends 42 and 43 of the valve body 31. The valve body 31 is `counter-bored downwardly from its upper end 42, and in this bore 44 a needle valve stem 45 is adapted to slide. The bore 44 is connected with the outlet port 36 through a port 46, and with the fuel supply, below its level 22 in the reservoir I1, by an inlet port 41 which is also covof a coiled spring 50 seated against its upper end.

rIfhe spring 59 is arranged to constantly react between the enlarged portionv 49 .of the stem 45 and the nut E0 to normally hold the valve stem 45 in valve closing position in the port 46. The

valve stem 45 has an extension 5I above the enlarged portion 49, which passes upwardly through the'nut d@ and is connected to one Vend of a firstclass lever 52 by a short link- 53. The lever 52 is pivoted at`54 to a vertical post 55 secured to the cover 3l by a screw 56. The other end of the lever 52 is pivotally connected loosely to a core member 51 which is adapted to freely move up and down in the bore 58 of a cylindrical solenoid 59. The solenoid 59 is secured to the cover 3| by a band 60 andscrews orrivets 6I. Electrical conductors 62 and 63 are exibly connected with the solenoid 59 and lead to the thermostatically controlled switch I2, through the conductor I4, to the line wire L2, and through the conductor I6, respectively, whereby the solenoid 59 will be energized when the thermostatic switch I2 is closed. A protecting cover 64 removably hinged at 65 to the cover 3i is provided with a catch finger 66 adapted to engage in a slot 61 in the cover 3l.

Operation After the burner is lighted, the valve 23 will be manually set to maintain the desired degree of low fire, or to maintain a pilot flame of the proper size. When the -thermostatically controlled switch I2 is actuated by the lowering of the room temperature, the solenoid 59 will be energized to attract the core member 51 downwardly. Movement of the core member 51 down wardly into the solenoid bore 58 tilts the level- 52 about its pivot 54, and through the link 53, and the stem extension 5I raises the needle valve stem 45 to open the port 46 and allow fuel to now from the reservoir to the burner mechanism I I through the outlet I9 to provide a high lire.

The provision of a reservoir in which the inlets y It will be understood that the present invention may be installed on an oll burner of any type already in use or newly constructed. In the latter case, the reservoir will preferably be made as an integral part of the usual reservoir provided therein.

While there has been disclosed in this specification one form in which the invention may be embodied, 1t is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modiilcations and embodiments coming' within the scope of the following claim.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent, is:

In an oil burner control apparatus, a housing containing oil, said housing having an inlet for connection to a source of oil supply and an outlet for connection to an oil burner, a vertical valve chamber in said housing directly above and connected with said outlet, a main valve seat in said vertical valve chamber, a normally closed main valve for engaging said main valve seat, a side chamber connected to said vertical chamber below said main valve seat, said side chamber having a vertical upstanding section, a pilot valve seat in said side chamber, a pilot valve in said upstanding section for engaging said pilot valve seat, said vertical chamber having an inlet opening below the oil surface and above said main valve seat, said side chamber having an inlet opening below said pilot valve seat, said main valve having a stem extending above the top of said housing for connection to a thermostatically operated mechanism to automatically open said valve when high heat is called for, said pilot valve also having a stem extending above the top of said housing,- and having a manually-operated Y control handle connected thereto.

KENNETH FRENCH.

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