US1973600A - Damper - Google Patents

Description

Sept. 11, 1934. J. H. Br-:AlRsTo DAMPER Filed March 17, 1933 Snventor Clttornegs Patented Sept. 11, 1934 UNITED STATES PATENT OFFICE This invention has for its object, a simple but effective means for eliminating excessive drafts over lire pots, burners, or Whatever may be used as a combustion means in a coal or oil burning range, or in a heater of a similar kind. The invention aims to provide a structure of the kind described which will save coal or other fuel, and permit a steady 110W of oil, if oil is the fuel.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in View, Which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise ernbodiment of the invention herein disclosed, may be made Within the scope of What is claimed, without departing from the spirit of the invention.

In the accompanying drawing:

Fig. 1 shows in bottom plan, a stove lid equipped with the device forming the subject matter of this invention;

Fig. 2 is a transverse section of the structure shown in Fig. 1.

The numeral 1 marks the top of a kitchen range or other heater, using fuel of any desired kind. The top of the stove-has a plurality of recesses 2, in which are mounted the ordinary imperforate stove lids (not shown).

In carrying out the invention, one of the rear stove lids is removed, and its place is taken by the lid 3, shown in the drawing, the lid 3 fitting closely in the place formerly occupied by the imperforate stove lid. In mounting the lid 3 in place, the part 4 of the damper 5 is disposed to- Ward the back of the stove, that is, toward the place where the draft pipe of the stove is connected. The damper 5 has an upstanding circumferential rim 6. The rim 6 is so shaped, and the damper 5 is so hung, that the upper edge of the rim 6 can fit against the under surface of the lid 3, if necessary, although the damper usually does not occupy that position.

The damper 5 is attached by securing elements 7, rigidly, to the attened inner end 8 of a lever 9 of the first order, the outer end of the lever being marked by the numeral 10.

Operatively connected with the outer end 10 of the lever 9 is a counter-poise means offsetting the Weight of the damper 5. This counter-poise means may be a Weight 11, capable of adjustment longitudinally of the part 10 of the lever, and

held in adjusted positions by any suitable means,

an S-shaped portion 14, the bends of which are connected by a cross bar 15, detachably received in depending hook-shaped bearings 16 on the lid 3, although some other means for fulcruming the lever 9, intermediate its ends, might be provided. The lever 9 is so fulcrumed with respect to the depending lip 17 of the lid 3, and the part 10 of the lever is of such length, that, when the damper is poised, as shown in Fig. 2, the Weight 11 cannot slide off the end 10 of the lever 9, and drop into the fire, if the set screw 12 happens to be loosened, the space between the outer end of the part 10 of the lever and the lip 17 being less than the length of the weight 11.

The lid 3 has draft openings 18, located immediately above the damper 5. The lid 3 is provided, also, with a seat 19 for the usual lid lifter (not shown), the seat being formed in a bulge 20 on the lid, although the seat` might be made some other way.

The operation of the device is simple. The draft through the pipe and chimney (not shown) creates a down draft through the openings 18 of the lid 3, and in this way, the draft pull on the fire is checked so that there Will not be too strong a draft out of the chimney, fuel being saved, when the Wind is high, and a smooth and even flame being provided if oil is used as a fuel.

By shifting the Weight 11 along the part 10 of the lever 9, the lever may be so poised that the damper 5 will be close to or against the undersurface of the lid 3, or at an adjusted distance from the under-surface of the lid. In this Way, the down draft through the openings 18 may be regulated.

Special attention is directed to the ease with which adjustments may be made. All that Vthe operator has to do is to lift off the lid 3 by means of a lifter inserted into the seat 19, change the position of the weight 11, and put the lid 3 back in the recess 2.

Having thus described the invention, what is claimed is:

1. A removable lid, shaped to occupy one of the ordinary cooking holes of a stove, and having a draft opening, a lever, means for fulcruming the lever intermediate its ends on the lid, a damper on one end of the lever and controlling the opening, and counter-poise means for the damper, connected to the opposite end of the lever.

2. A removable lid, shaped to occupy one of theV ordinary cooking holes of a stove, and having a draft opening, a damper controlling the opening, a lever fulcrumed intermediate its ends on the lid, the damper being mounted on one end of the lever, a Weight liftable along the opposite end of the lever, and means for holding the Weight in adjusted positions.

JOHN HECTOR BEAIRSTO.

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