US510700A - Portable bellows-forge - Google Patents

Description

(No Model.)

I. MYERS.

PORTABLE BELLOWS FORGE.

No. 510,700. Patented Dec. 12, 1893.

EMA h M. Inventor.

Attorney,

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UNITED STATES PATENT OFFICE.

\ FRANK MYERS, OF BUFFALO, NEW YORK.

[PORTABLE BVELLQWS-FORGE.

SPECIFICATION forming part of Letters Patent No. 510,700, dated December 12,1893. Application filed February 7, 1893- Serial No. 461303. (No model.)

'My invention relates to certain improve-- ments in portable bellows forges, for the use of boiler makers, blacksmiths, ship builders, or for any purpose for which a portable forge maybe adapted, whereby the forge is rendered more effective in its action and is more easily kept clean, all of which will be fully:

and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in whichr Figure 1 is a side elevation partly in section, certain portions being broken away to show the interior construction of the removable ash pan, the relief valve and the attachment of the pipe to the bellows. Fig. 2 is a cross section through 'a port'ion of the tuyere plate. Fig. 3 is a vertical section through a forge in or about line a a Fig. 4, cutting centrally through all parts of the forge except the enlarged tubular portion of the tuyere pipe for holding the ash pan, the upper portion of the tuyere being broken away to show the interior construction.

holding standard 4, between the jaws of which is pivoted a lever or arm, 5, having its outer end pivoted to an L shaped vertical bar, 6, by a pin 6 for operating the bellows. This angular bar, 6, is secured in a little slideway or case, 7, at the bottom and also to the bottom of the bellows, so that the pivotal pin, 6, and

-the sliding case, 7-, keep the bar, 6, sufficiently in line for operating the bellows. The tuyere plate, 8, is circular and is provided with an upward projecting peripheral flange, 8 This plate, 8, fits down within -the case, 1, and rests on an inwardly projecting fiange, 9. It is pro- Fig. 4, is a top view of the tuyere plate, the tuyere cap being omitted. Referring to the drawings-1 represents the vided with a tubular portion which passes directlyacross the center and projects equally above and below the plate, 8. This tubular portion is formed or cast in one piece with the tuyere plate and consists of two parts, a blast portion, 10, and an enlarged portion 11', adapted toreceive a removable ash pan, 12. The ash pan is made either of a semicircular form in cross section or of a substan tially square cross section as shown in Fig. 2, and is adapted to slide easily in or out of the enlarged tubular portion, 11, which is made of the proper form to receive it.- At the front or mouth 1 1 (see Fig. 4,) of the tube, 11, is apivoted cover, 12, pivoted by a pin, 12. This cover is pivoted at. the point, 13, shown in Fig. 4 so that when closed its latch portion drops on to the projecting portion, 13, shown in Fig. 4. The lower portion, 14, of the tuyere is also formed in one piece with the tuyere plate and at the bottom is an opening, 15, communicating with the air blast and ash pipes.

' The top, 16, or cover of the tuyere is propieces, 17, when the cover is put on, drop down between the outward projectingholding pieces 1818, shown in Fig.4. Then the wedges 17, are put in place substantially 'as'sho'wn in Fig. 4, and the cover is securely held in place. This tuyere cover is provided with a series of outlet holes, 19, through which the air'blast passes when the forge is being operated.

Thc bellows consists of the central circular disk," 20, which is rigidly secured to the case 1 by the inner washers 21 and screws, 22. See Fig. 4.

23 represents the leather sides and 24-24,

the usual movable top and bottom of the bel-' lows.

Between the top of the bellows and the bottom of the tuyere plate is a series of spiral springs, 25, for forcing the top of thebellows down against the pressure of air when the bellows is used.

The bellows valves are constructed, as follows: The base or lower portion, 26,'is made of cast iron, then aleather valve piece, 27, secured by screws 28 t0 the disks 20 and 24. Above the leather valve pieces is a circular sronoo through a hole in the case 1 and into a semicircular depression in the side of the disk, 20. Over it is then placed a cap 34, (see Figs. 1 and 4,) secured by the usual screws or bolts 35, shown by dotted lines in Fig. 4. A pin 36, is then passed down through the cap, extension piece and bellows disk, 20, which holds it securely to said disk, 20. A nut 37 is then screwed over the other end of the extension piece tightly up against the leather side, 23, 0f the bellows and the elbow, 32, screwed on in place. The blast pipe 31, is put in place by turning the elbow 32 over to one side and then screwing the top of the pipe, 31, up into the valve case, 34, sufficiently far to allow the elbow, 32, to be turned up to its normal position and then turning the blast pipe in a reverse direction so as to screw it tightly into the elbow, 32, the screw portion at the top of the pipe, 31, being long enough to allow this to be done without unscrewing it entirely from the valve case. In the valve case, 34?, is a pivoted relief valve, 35. This valve is adapted to drop down by its own weight until stopped by the hook shaped stop piece, 36. The object of this construction is to give relief to the gases in the tuyere after the forge has been used. This valve, 35 is closed by the pressure of the air from the bellows while being operated, but as soon as the bellows is stopped the valve, 35, opens by its own weight and thereby allows any gases that may accumulate a free passage out inthe direction of the arrows 89 through the top of the relief valve. This construction prevents the gases from passing down into and blowing up the bellows, which often happens. It will be noticed that the pivoted valve,35", never closes the communication between the bellows and the tuyeres, as in my Patent No. 457,892. It only closes the passage for the escape of air outside during the operation of the bellows so as to give the tuyere the full force of the blast, and the valve only opens a second passage when the action of the bellows stops and the pressure of the blast is taken from it. The result of this construction, is that the explosive gases, which are lighter than air, take the free and natural course up and out through an open passage left by the opening of the valve when the pressure from the air blast is removed instead of going downward into the bellows. The valve, being a suspended swinging valve, is easily operated by the blast from the bellows or by gravity.

Above the relief valve is a shield, 37, to prevent dust or dirt from falling down and getting into the valve.

I claim as my invention- 1. In a portable forge, a tuyere plate adapted to fit within the forge case, the lower portion of the tuyere, a pipe across the center of the plate having one portion of larger diameter than the other to form an ash pan receptacle, and the other forming an air blast pipe with an opening communicating with the tuyere, the ash pan receptacle and blast pipe projecting equally above and below the tuyere plate and the whole formed or cast in one piece, substantially as described.

2. In a portable forge, a means for attaching the blast pipe to the bellows, conslsting of an extension piece 33, adapted to pass through a hole in the case and into a sem1- circular recess in the bellows disk, a cap for covering the end in the bellows disk, a pin for securing it thereto, and a nut for holding the whole tightly to the leather side of the bellows, substantially as described.

FRANK MYERS.

Witnesses:

J ENNIE M. CALDWELL, JAMES SANGSTER.

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