US410161A - Portable forge - Google Patents

Description

C. H AMMBL'MANN.

PORTABLE FORGE.

No. 410.161. Patented sept. s, 1889.

(No Model.)

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`UNTTED STATES PATENT OFFICE;

CHARLES HAMMELlVIANN, OF BUFFALO, NEV YORK.

PORTABLE FO RG E.

SPECIFICATION forming part of Letters Patent No. 410,161,V dated September 3, 1889. Application filed December 18, 1888. Serial No. 293,939. (No nibdel.)

To all wir/om, t may concern:

Be it known that I, CHARLES HAMMELMANN, a citizen of the United States, and a resident of Buffalo, inthe county of Erie and State of New York, have invented new and useful Improvements in Portable Forges, of which the following is a specification.

which tends to draw the gases from the hearth' into the bellows, and frequently results in the destruction of the bellows by the explosion of the gas conned therein.

The object of my invention is to overcome this objection by providing means whereby the gas is effectually prevented from being drawn into the bellows; also, to construct the tuyere in such manner that the blast will be utilized for cleaning the tuyere, so as to avoid clogging thereof, and, finally, to simplify the connections forming the passage between the bellows and the tuyere.

In the accompanying drawings, Figure l is a sectional elevation of a portable forge provided with my improvements. Fig. 2 is a horizontal section thereof7 taken above the tuyere. Fig.l 3 is a horizontal section of the tu yere and the casing connected therewith containing the check-valve. Fig. 4 is a vertical crossa section in line Qc, Fig. l, on an enlarged scale.

Like letters of reference' refer to like parts in the several figures.

A represents the upright cylindrical casin inclosing the parts of the forge.

B is the upright bellows arranged within the casing A, and having movable top and bottom plates b b and a central stationary Vplate or partition b2, which is secured to the casing A, as shown. The central and bottom plates b b2 are provided with air-openings c, which are closed by upwardly-swin ging clapvalves c in the usual manner.

E isthe hearth or fire-pan secured withinV the upper portion of the casing A, above the bellows; and F is the tuyere arranged cen-` trally upon the hearth and connected with the upper compartment of the bellows by a blast-pipe4 G, which consists of an upright section g and two horizontal sections g g2.

7L is a horizontal valve-casing arranged on one side of the tuyere F, communicating at its inner portion withthe latter by a passage h and connected at its outer end to the hori-` zontal section g' of the blast-pipe, the outer end of the valve-casing being provided with an internal screw-thread, with which the eX- ternal thread of the section g engages.

t represents a spherical check-valve arranged within the casing 7L and adapted to close against the adjacent end of the section g of the blast-pipe. The check-valve c' rests in an inclined groove or way t', which slopes toward the end of the pipe-section g', so that the valve will tend to move against the end of said pipe by gravity. The movement of the check-valve is limited in one direction by the end of the pipe g and in the other direction by stop-pins t2, formed inside of the valvecasing. Upon forcing a blast of air through the blastpipe G` the check-valvei is moved away from the end of the pipe g and permits the blast to pass onward to and through the tuyere; but as soon as the blast ceases the valve rolls down the incline vl against the open end of the pipe g and closes the latter, thereby preventing the suction which is created within the bellows during the period that the hand-lever is held in a depressed position from drawing the gases from the hearth and tuyere back into the bellows through the blast-pipe and endangering the safety of lthe bellows. The valve-casing vl is preferably made considerably larger than the pipe g', so as to afford a wide and ample passage for the blast around the check-valve. The-lower horizontal section g2 of the blast pipe passes through an opening formed in the leather or flexible portion of the bellows, and is secured at its inner portion to the upper side of the partition-plate h2 by a metallic strap j, the pipe being secured to the'bow of said strap by a rivet or otherwise, so as to be held against turning. A block of wood Zt is fitted over the strap j and the inner portion of the pipe g2, and is secured to the upper side of the partition-plate b2. This block forms a support to which the flexible portion of the bellows surrounding the opening through which the pipe g passes may be tacked, so as to form a reliable air-tight joint around said pipe, and which would not be possible in the absence of the block The lower horizontal pipe-section g2 is connected to the lower end of the upright section g, preferably by a T Z, the lower end of which is closed by a screw-plug Z, so that any'asles or sediment accumulating thereinV ma y be removed. The upper horizontal pipesection g is connected with the upper end of the upright section gV by an elbow m. The

upright'section g is provided at its upper endY with a movc ble screw thimble or nipple m',

i which is provided with an internal screwthread engaging with an external thread on the pipe and with an external thread engaging with an internal thread formed in the adjacent portion of the elbow l711-.

In assembling the parts the upper and lower horizontal sections g g2 are first attached to the valve-casing 'L' and the partition-plate b2, and the T Z and elbow m are screwed upon the outer ends of said pipes. The upright section g, which is made Vsomewhat shorter than the distance between the elbow and T, is then screwed to the latter, and the thimble, which has been previously screwed down upon the pipe g to admit it between the T and elbow, is now screwed upward on the pipe g and with its upper end into the elbow. This forms a very simple construction, which permits the parts of the blast-pipe to be readily connected and disconnected for cleaning the same or for other purposes.

The tuyere F consists of a hollow annular shell or casing, the lower part n of which is preferably formed with the bottom plate of the hearth E, While the upper part n thereof is bolted to said lower part. The upper part 'nis provided with a central discharge-opening o and with a depending annular flange or rim p, surrounding the opening 0, and which projects downwardly a short distance into the shell of the tuyere, so as to compel the blast to dive under said flange before escaping through the opening o, and thereby keep clean the interior of the tuyere and prevent accumulation of ashes in the saine.

q is a cup-shaped receptacle arranged within the tuyere directly underneath the dischargeopening o and separated from the depending flange p by a narrow space, forming a passage for the blast. The cup q catches any ashes falling through the discharge-opening 0, and

as soon as they are deposited in the cup they are blown out by the blast. The cup gis provided at its upper edge, in front ofV the passage h, with a guard or deflector o", which prevents the blast from escaping directly through the discharge-opening o and compels the same to pass wholly around the cup before escaping, thereby causing the blast to circulate through the entire inner portion of the tuyere and clearing all parts thereof. The cup q is provided on its under side with a stem s, which is seated in a socket in the lower plate n of the tuyere, and the cup is held from rising out of place by upwardly-proj ecting pins t, formed on the upper side of the cup q and bearing against the under side of the top plate n of the tuyere l?.

The upper com'partment of the bellows is preferably compressed by means of spiral springs U, interposed between the under side of the hearth-plate and the top plate Z) of the bellows.

I claim as my inventionl. In a forge7 the combination, with a bellows-and a tuyere or blast-discharge nozzle, of a blast pipe or passage connecting the bellows with said tuyere or discharge-nozzle, and a check-valve arranged in said passage, substantially as set forth.

2. ln a forge, the combination, with a bellows and a tuyere, of a valve-casing connected with said tuyere and provided with an inclined way, a blast pipe or passage connecting said valve-casing with the bellows, and a check-valve arranged in the valve-Casin g upon said inclined Way,'s'ubstantially as set forth.

8. In a forge, the combination, with the Y' Y tuyere and the bellows having a stationary partition b2, of a blast-pipe connecting the bellows with the tuyere and provided with a horizontal branch or section g2, entering an opening in the flexible portion of the bellows and secured to the partition b2, and a block 7c, fitted over said pipe within the bellows and forming a support to which the flexible portion of the bellows surrounding the pipe is tacked, substantially as set forth.

4. In a forge, the combination, with the bellows and the tuyere, of the valve-casing Zt and check-valve t', the blast-pipe G, connecting the bellows with said valve-casing andV composed of horizontal sections g g2, and an upright section g, a T Z, connecting the lower horizontal section g2 with the lower end of the upright section g, an elbow m, attached to the outer end of the upper horizontal seotion C', and a movable screw thimble or nipple ym', attached to the upper end of the upright section gV and connecting the latter with the elbow m, substantially as set forth.

5. ln a tuyere for forges, the combination, with an annular shell or casing provided in its top with a discharge-opening and in its side with an inlet-opening, of a depending flange or rim surrounding said opening, a cup or receptacle arranged within the annular casing underneath said discharge-opening IIO 1o i depending {iange p,and a @np or receptacle q, arranged Within the tnyerepasing underneath the discharge-opening o andprovided with a `stem seated in the socket of the lower part 'n of the tuyere, substantially as set forth.

Witness my hand this 12th day of Decem- 15 ber, 1888.r

CHARLES HAMMELMANN.- Vitnesses:

C. F. GEYER, C. D. HoWE.

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