US278370A - smith - Google Patents

Description

AAA-'151 A A A (No Model.)A

W. H.- SMITH.

PATTERN POR MQLDING STOVB LIDS.

u Patented May 29,1883,

No. 278,370.l

if A

y UNITED STATES PATENT OFFICE.

t WILLIAM HSMITH, OF READING, PENNSYLVANIA, ASSIGNOR OF ON E-HALF TO ORB, PAINTER AND COMPANY, OF SAME PLAGE.

PATTERN FOR MOllDING STOVE-LIDS.

SPECIFICATION forming part of Letters Patent No. 278,370, dated May 29, 183. n

Application filed February 16, 1883. (No model.)

To all whom 'it 'may concern:

Be it known that I, WILLIAM H. SMITH, a citizen of the United States, and a resident of the city ofBeadin g, county of Berks, and State of Pennsylvania, have invented a "new and useful Improvement in Patterns for Molding y Stove-Lids, of which the following is a specification. t

This improvelnent relates more particularly 1o to the mode adopted to form the lifter-recess and its lip in the stove-lid or other parts of the same, whereby the same is cast without recourse to cores, wires, or chills.

The object ofthe improvement is to produce 15 a stove-lid, cross-piece, 85e., of a uniform level surface uponits upper face, undisigured by chills, wires, or coremarks, to facilitate the molding ofthe same in green sand, and to increase the output of the individual melder.

i zo These results are attained by the use of a special card used in combination with the flasks, as shown in the accompanying drawings, forming apart of this specification, and in which similar parts are designated by 'similar let- Figure l representing a plan of the card, in which the stove-lids are shown with their face up; Fig. 2, a section through the flasks, card, and patterns, showing the drag rammed up t 3c. preparatory to the reversal of the same and the ramlning up of the cope; Fig. 3, a detail section andplan of the withdrawing apparatus,l in al1 of which- A represents the card, into and upon which i the patterns are affixed, as usual in snap-Hasi:

molding; A',the sprue; B,the stove-lid pattern s upper face; B', the stove-lid p atterns under face; O, recess for lifter 5 C', lip or bar in the recess, whereby the lid isl lifted. This lip in 4o the pattern is a movable piece, having projected ends C, that even up the back of the recess-shell and prevent Vthe projection of the lip within the `recess beyond the desired point.- D is the shell of the recess 5 D', an opening at the rear of the same for the introduction of the "5o the lip.` I do not confine myself to this wmode of operating the lips, as the lids or other pieces may, be differenti y arranged upon the card, and a single rod, by branches therefrom, be adjusted to operate all the several lips at one time. I give preference to the plan shown, as 5 5 being the least expensive. y

The operation of molding is as follows: The snap-flasks, as usual, are provided with pins fitted to the card and to each other in such manner that it is indifferent as to which cope 6o or drag of thelot may be selected. Each set, when paired, will have, when rammed up upon the card A, a fac-simile of the article to be cast within the same. In this case the drag G is first rammed up and reversed with the card. The handlesFare then pulled away from the card, which, by the rod E, connection with the lip-piece O O2, draws the same out of the sand held within the recess O ofthe lid-pattern. This permits the card to be lifted off, there being 7o nothing to interfere with the removal ot' the card after the lip-piece is withdrawn from the recess. This is followed up until the required number of drags are molded up. The card is reversed and the same number of copes completed, the sprues A being supplemented by a gate or riser, as shown in dotted lines. The oopes are then placed upon the drags and the iiasks poured in the usual manner, `the result being a cover or lid of a uniform, smooth, and "8o unrufed face, a clean-cut lip of a strong and neat form, and well adapted for the service it` is to perform.

I am well aware that I am not the flrst to use a movable piece to form lips for the lifter in a stovelid5 but in all which have come to my knowledge (except Patent No. 32,465, June 4, 1861, M. G. Burleigh, of which more anon) the lips were formed as isolated projections each side of the recess longitudinally, and were 9o uncertain in the casting and liable to breakage, and, forming part of the face ofthe lid, left a fin on the face of the casting, whereas my lip is transverse to the'rcoess and forms an inte= gral portion of the lid, and will withstand as 9 5 much service as the lid itself. Being so constructed that the lip is withdrawn from the mold below the face ofthe lid, it leaves no mark to show the manner of its construction and saves the labor of the grinder in facing roo Ycrush the sand, and, from its construction and position@ in the recess when cast, forming a dirt-receptacle on its upper face and a Weak and imperfect lifter-bar, my improvement7 on the contrary, when cast, presenting a lifter-bar inclined from the top face ofthe lid to the base ot' the recess, anda horizontal and parallel under face for the lifter, my bar being in strength equal to the lid.

Having shownthe construction of my invention, its mode of application, and described its advantages, I desire to secure by Letters Patent the following claims thereon z 1. The card'A, provided with the patterns B B B B', sunk in and inJ relief thereon, in combination with the movable pieces C C2, rods E, handles F, shells D, openings D', and lifter-recesses C, for the purpose described, and substantially as shown.

2. A stove-lid pattern, B, provided withY a lifter-shell, D, with opening.;` D and recess C, a movable lip-piece, C' G2, and rod E, With handle F attached thereto, in combination with card A, provided With a recess for the rod E, substantially as shown, and for they purpose set. forth.

H. SMITH.

Witnesses:

F. PIERCE HUMMEL, THOMAS P. KINsEY.

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