US981898A - Mold-pattern for stove-lids. - Google Patents

Description

W. H. TAPHORN. MOLD PATTERN FOR STOVE LIDS. APPLICATION FILED 11017.16, 1909.

9 1 93; v Patented Jan.17,1911.

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Unrrn WILLIAM H. TAPHORN, OF BELLEVILLE, ILLINOIS.

MOLD-PATTERN FOR STOVE-LIBS.

Specification of Letters Patent.

Application filed November 16, 1909.

Patented Jan..17, 1911. Serial No. 528,289.

To all whom it may concern:

Be it known that I, VVILLIAM HENRY TAP- HORN, a citizen of the United States, residing at Belleville, in the county of St. Clair and State of Illinois, have invented certain new and useful Improvements in Mold-Patterns for Stove-Lids, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in mold patterns for stove-lids; and an object of my invention is to provide a mold pattern of the character described which will consist of a unitary structure comprising a matchplate, a cover pattern and means for forming in the mold the two holes for the production of the lips for the stove-lid lifter in the finished casting, the match-plate serving to carry the other parts.

Another object of my invention is to provide a mold pattern of the type above defined which will permit the workman to produce a better mold in less time than is possible with devices heretofore known and thereby to cheapen the product-ion of the finished article,the stove-lid.

In the drawings illustrating the principle of my invention and the best mode now known .to me of applying that principle, Figure l is a plan of the back or rear face of my new mold pattern, a portion of one edge being shown broken away for economy of space; Fig. 2 is a plan of the front or working side of my new mold pattern, a portion of the cover pattern being shown broken away for the sake of clearness and to expose the parts beneath the cover pattern; and Fig. 3 is a section on the line AA of Fig. 2.

In the top or front face of the match-plate a are formed a circular groove 6, a groove 0 which forms a part of a circle concentric with the groove 1) and a depression or recess d at the lateral walls of which terminate the ends of the inner groove 0. The walls of the cavity 03 project from the back of the matchplate and form a sort of boss which is adapted to produce in the mold the sink of the cover or lid (Figs. 1 and 3). The cover pat tern e is formed with a circumferential flange f at its edge and with a curved rib g shaped to fit the inner groove 0. The flange f fits in the outer groove 5. The cover pat tern c then lies flush with the front face of the match-plate (Fig. 3) and is formed with a pocket or depression, 72, sometimes called a Sink the Walls of which project from the bottom face of the cover pattern to form a sort of shell and fit snugly in the cavity at formed in the top of the match-plate a. To fasten the cover pattern to the latter, screws 2' are passed through holes in the cover pattern into screwholes or threaded holes in the match-plate. The rear or back face of the latter is formed with a circular rib or flange m which serves to produce in the mold the flange which in the cover casting corresponds with the flange f.

In the top of the match-plate a are formed a pair of channels or guideways j which are in line with each other and the inner opposed ends of which communicate with the recess (Z. Formed in the top of the matchplate a and communicating each with one of the guideways j are a pair of recesses or notches is which are V-shaped. In each side wall or lateral wall of the sink or recess h is formed a hole m which, when the cover pattern is fitted in place on the match plate a, is in line with the inner end of one of the guideways 7'. In each of the latter is mounted a plunger 11, formed with a notch 0 into which extends one end of a leaf spring 10 the other end of which is anchored in the matchplate a near the apex of the V-shaped recess or notch 70. Each plunger n carries a pin 9 the free end of which extends through a slot 1" formed in the match-plate a and projects from the bottom or back of the latter to form a fingerhold. A small disk or button 8 is mounted on each pin 9 and serves to cover the slot 1".

The cover pattern being secured in place upon the match-plate, in which position the top face of the former will be flush or level with the same face of the latter, my new mold pattern is placed in molding sand in a flask with the cover pattern face down and the pins 51 projecting upward so as to be accessible to the workman, when the time to operate them arrives. The top of the flask or cope is then put in place and molding sand is thoroughly tamped around the pat tern in the usual way in making molds practiced today. The upper part or cope of the flask is removed, thereby exposing the projecting ends of the pins 9 to view. It will be understood that the sink or depression k in the cover pattern 6 is at this time filled with thoroughly tamped molding sand. Using the projecting ends of the pins Q as fingerholds, the Workman presses the pins 9 toward each other and thereby forces the opposed ends of the plungers or slides n toward each other through the holes m, in the side Walls or lateral walls of the recess or sink h. It will be understood that the shape of the ends of the plungers n is like that of the lips to be formed on the stove-lid or stove cover and that the contour of the holes m is such as to permit these plunger ends to move there through with a sliding fit. The pins 9 drive the plunger ends into the sand compacted in the sink h and, when the pressure upon the pins Q is removed, the leaf springs 29 carry the plungers 12 back into the guideways or channels to their initial ororiginal positions. The wi'tl'idrawal of the plunger ends causes cavitiesto be left in the compressed sand in the sink h, into which cavities flows the metal to form the lips or ears for the engagement of the stove-lid lifter. The mold pattern is now removed and the cope is replaced, after which the ordinary operations of founding or casting are performed in a manner well known to all skilled in that art.

I claim:

A mold pattern of thecharacter described, consisting of a match-plate formed on one face with a rib or flange and having in its opposite face a depression and a cavity, the walls of the latter projecting from the firstnamed face; a cover pattern mounted in said depression with its outer face flush with the last-named face and formed with a sink the walls of which fit in said cavity, the sidewalls of said sink being each formed with an opening; a pair of plungers mounted between said cover patt-ern and match-plate and adapted to be forced outwardly through said openings into said sink; and devices projecting from the first-named face of said match-plate for actuating said plungers.

In testimony whereof I have hereunto set my hand at said B'elleville this twelfth day of November, A. D. 1909, in the presence of the two undersigned witnesses.

WILLIAM H. TAPHORN.

Witnesses:

IV. R. WEBER, HELEN JONES.

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