US1101152A - Twyer. - Google Patents

Description

A. B. SMITH.

TWYER.

APPLICATION FILED FEB. 4, 1914.

1,1 01, 1 52, Patented June 23, 1914.

ALvI'A B. SMITH, or MIDDLEBURY, VERMONT.

' TWYER.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed February 4, 1914. Serial N 0. 816,542.

To all whom it may concern Be it known that I, ALVIA B. SMITH, a citizen of the United States, residing at Middlebury, in the county of Addison and State of Vermont,have invented certain new and useful Improvements in Twyers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to twyers and more particularly to a .forge twyer, the invention having for its primary object to provide a simple, inexpensive and reliable device of this character for supplying air to the fire bed of a blacksmiths forge.

The invention has for another important object to provide a twyer having certain improved structural features, whereby liability of clogging of the air passages is obviated, and to facilitate the dumping or discharge of the ashes or cinders.

The invention has for another of its objects to provide means for supplying air to .the air receiving chamber of the twyer either from a hand blower or electric fan through a single air conducting passage.

The invention has for a further object to generally improve and simplify the construction of devices of the above character and render the same strong, durable and serviceable in practical use.

With the above and other objects in view as will become apparent as the description proceeds, the invention consists in certain constructions, combinations and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side elevation of a twyer emioodying my invention in its preferred form. Fig. 2 is a top plan view. Fig. 3 is a section taken on the line 3-3 of Fig. 2. Fig. 4 is a section taken on the line 44 of Fig. 1.

Referring in detail to the drawings, 5 designates the fire pot of a blast forge such as is commonly used by blacksmiths, said fire pot being formed from a single metal plate, the central portion of which is of conical shape in cross section as indicated at 6. At the outer edge of this conical body portion of the fire pot the same is provided with an outwardly inclined downwardly extending flange 7, and upon the edge of this flange the laterally projecting attaching flange is formed, said latter flange being preferably of square or rectangular shape in plan. The lower body portion of the twyer 9 is also of conical form in cross section and is provided upon its edge with an upstanding flange 10 from which the rectangular flange 11 laterally extends, the flange 8 of the fire pot be- 1ng adapted for engagement upon the flange 11 and secured thereto as clearly shown in Fig. 3 of the drawings.

It will be observed that when the parts are assembled the fire pot 6 and the lower body portion 9 of the twyer are inverted, the flanges 8 and 11 being secured together whereby the conical portions of the fire pot and body are maintained in spaced relation to provide the air chamber indicated at 12. In the apex of the conical portion 6 of the fire pot a circular opening 13 is formed and contiguous to this opening a plurality of rectangular openings 14 are provided in the fire pot. The apex of the body portion 9 of the twyer is also provided with a relatively large ash or cinder outlet opening 15. This opening is normally closed by a conical valve plate 16 which is secured upon one end of a lever 17. This lever is fulcrumed intermediate of its ends upon a depending bracket 18 which is fixed to the twyer body 9. One end of a coil spring 19 is secured to said bracket, the other end of said spring being attached to the lever 18. This spring normally operates to hold the valve plate 16 in the opening 15 and close the same. Air is supplied to the chamber 12 through the passage or conduit 20 which opens into said chamber through one side of the body 9 at its upper end. To this conduit, a second pipe or conduit 20 is connected and extends at right angles thereto. A valve plate 21 is pivotally mounted at 22 within the pipe or conduit 20 upon the side of the opening therein surrounded by the valve pipe 21 which is far thest removed from the twyer. Assuming that the several parts of my device have been arranged together in the manner above explained and mounted in the forge, the operation of the device will be understood as follows. When it is necessary to supply air to the fire bed, the hand blower, electric fan or other blast producing means is set in operation. Assuming that the pipe or conduit 20 is connected to the hand blower, the air enters therefrom into the chamber 12 of the twyer and circulates around the fire pot 5 so that it is heated, said air rising through the openings 13 and 14 in the bottom of the fire pot as additional air is supplied to the chamber 12. If it is desired to supply airto the twyer from the electric fan or other source, the same will enter from the pipe 20 into the passage 20, the valve plate 21 being moved from the position shown in full lines in Fig. 3 of the drawings to the position indicated in dotted lines so that the air as it enters the pipe 20 cannot move backwardly therein but enters the receiving chamber 12 of the twyer as shown by the arrows.

From the above description, taken in connection with the accompanying drawings, the construction, manner of operation and several advantages of my invention will be clearly and fully understood. The ashes or cinders collecting in the chamber 12 may be easily and quickly removed therefrom by simply operating the lever 17 to remove the valve plate 16 from the opening 15. The inclined body walls of the twyer will direct such accumulations downwardly through said opening. By supplying the air blasts between the spaced fire pot and body wall, liability of the air supplying passages becoming choked or clogged with cinders is efiectually prevented and the in coming cold air by contact with the walls of the fire pot is heated before it is finally forced upwardly by the increasing air pressure through the openings 13 and 14 and into the fire bed. seen that I have produced a device whereby the fire pot may be easily and quickly heated to a high degree. It is also to be observed that the apex of the fire pot intersects the plane of the discharge end of the blast pipe, whereby it will be perceived that the air blast is directed against such apex of the fire pot, whereby the wall thereof is cooled and the possibility of the burning out of the fire pot is reduced to a minimum. It

In this manner it will be will also be observed that a portion of the structed in various forms and sizes as may be required by the size of the forge in connection with which the invention is to be used. It is also to be further understood that the invention is susceptible of various other modifications in form,proportion and arrangement of the several parts and I therefore reserve the privilege of resorting to such legitimate changes as may be fairly embodied within the spirit and scope of the appended claim.

What is claimed is: V

The hereindescribed twyer including a body of inverted conical form, a fire pot also of inverted conical form arranged above said body and secured thereon, the inclined walls of the body and the fire pot being disposed in spaced parallel relation, said body at its apex having an ash outlet opening, a valve normally closing said opening, and

an air blast ipe connected tosaid body,f.

the apex of said fire pot intersecting and extending substantially entirely across the longitudinal plane of the discharge end of the blast pipe.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

CHARLES E. PINNEY, P. J. I-IINoKs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.

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