US688492A - Apparatus for smithing and draw-tempering cutlery. - Google Patents

Description

No. 688,492. A v, Patented uw. |o,|9m; Y G. E. SMITH. APPARATUS FOR SMITHING AND DRAW TEMPERING CUTLERY.

(Applmtiou leii Tune 21, 1901.) v(un Model.) 2 sheets-sheet 1N: wams PEYERS co, PnoTaLlYHo.. wAsmNsmn. n. c.

No. 638,492. Pateted Dm.. lo, 190|. G. E. SMITH.

APPARATUS FOR SMITHING AND DRAW TEMPEHING CUTLERY.

' (Application med June 21, 1901.)

(No Model.) i .2 Sheets-Sheet 2.

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UNTTED STATES PATENT OFFICE.

GEORGE E. SMITH, OF MERIDEN, CONNECTICUT, ASSIGNOR OF ONE-HALF TO JOSEPH P. SMITH, OF GLASTONBURY, CONNECTICUT.

APPARATUS FOR SMITHING AND DRAW-'TEMPIIRING CUTLERY.

SPECIFICATION forming part .of Letters Patent N o. $488,492, dated lDecernber 10, 1901.

Application tiled .Tune 21, 1901. Serial No. 65,436. (No model.) n

To a/Z whom t may concern.- p In the views the numerals 1 and 2 denote Be it known that I, GEORGE F.. SMITH, of two duplicate clamping-plates held in posi- Meriden, in New Haven county, Connecticut, tions of general parallelism by four duplicate have invented certain new and useful Imhorizontal screw rods 3, 4, 5, and 6, which 55 5 provements in Apparatus for Smithing and have heads 7 and terminal nuts 8 and are Draw -Tempering Cutlery, which improveinserted through ears or eyes 14 in those ments are described in th'e following specifiplates. On the lower rods 5 and 6 is supcation and are illustrated by the accompanyported a broad horizontal base-plate 9, having drawings. ing its bac-k edge turned up in a lip or ange 6o xo l My invention relates in general to the man- 10. For the purpose of covering theotherufacture of cutlery, and in particular to the wise open space between this base-plate and familiar operations of smithing, draw-temthe clamping-plates 1 and 2 small metallic pering, and straightening, which are persheets 2O are riveted to the latter, as shown formed upon blades in the process of manuin Fig.,2. An indelinite number of metallic 65 r 5 facturing knives. These several operations, drawing-blocks l1, preferably of iron, are as well as the operation of hardening, have arranged side by side 'on plate 9 just backof usually been performed separately and in lip 10 and between plates 1 and 2. lEach the following order, viz: first, the smithing, block 1l has on its upper edge a pair of lugs, done by heating the blades and by shaping forming a slot 12 between them, as shown in 7o zo and straightening them in a die; next, the Fig. 4. Ina modified form (shown in Fig. 5) hardening, effected by reheating and by sudthe same block 1l has a perforated ear 12 den cooling in oil or other liquid; then the in lieu of slot l2 and has also asecond perfodraw-'tempering, accomplished by again rerated earvl. To match the varying thickheating and by gradual cooling, and, lastly, nesses of the blades of knives 13, the blocks 11 75 z 5 the setting or straightening, which has been are severally beveled slightly in two direcperformed by hammering. tions, being made thicker at the top than at It is the object of my invention to consolithe bottom, as shown in Fig. 2, and thicker date several ofthese performances and to at the back end near lip 10 than at the front provide means for smithing, draw-tempering, end toward the handles of knives 13. Mid- 8o 3o and straightening such work in a single opway between plates 1 and 2 an additional eration and by onlyone heating. To acplate 2', being, in effect, a drawing-plate and complish this result, I make use of a peculin form a duplicate of plates 1 and 2 and proiarly-constructed clamp, which is provided vided with four eyes 14', is placed on rods 3, with a series of adjustable drawing-blocks 4, 5, and 6 to steady them and to prevent 85 35 and is adapted to hold a number of hardened them from buckling.Y 0n the same screwknife-blades separately distributed and comrods is set an adjustable screw-plate 16, havpressed between them during the process of ing a central screw 17, which bears on a block heating. 18. This block, which is shown in Figs. 1', 2,

The best manner in which I have contemand 3, is provided with two terminal feet 19, 9o 4o plated applying the principles of my invenbearing, respectively, upon the clampingtion is shown in the drawings. plate 2 lnear the forward screw-rods 3 and 5 Figure 1 is a plan of my improved appaand near the backward screw-rods 4 and 6. ratus with knives held thereby in position Such being the preferred form of the apfor treatment. Fig. 2 is a longitudinal verparatus, the mode of using it remains to be de- 95 45 tical section ofa portion of the same on the scribed. The knife-blades 13, already harbroken line x2 x2 in Fig. 1. Fig. 3 is a vertidened and ready for smithing, are distributed cal cross-,section of the same on the broken between the drawing-,blocks 11 in the posiline x3 003 in Fig. l. Fig. 4 is a detail, being tions shown and are firmly clamped there by a side view of one of the drawing-blocks. appropriate adjustment of screw-plate 16 and roo 5o Fig. 5 is a like detail of a drawing-block in block 18 and by manipulation of screw 17. a modified form. Then the ent-ire apparatus, as shown in Fig.

1, with the work in position, is set into the furnace, with the end portions of the baseplate 9 resting upon the edges of the furnace and with the body of that plate immediately over the fire. In this way the work is heated with and by the drawing-blocks 11 to the requisite temperature of 325 Fahrenheit, more or less, according to the quality of the steel of which the work is composed, and is at the same time both subjected to a clamping pressure from screw 17 and also protected from the direct action of the tire by the intervening base-plate 9, supplemented by the metallic sheets 20. Then without removing the apparatus from the re the clamp is loosened by turning screw 17, the knives are drawn out longitudinally toward the operator and laid aside to cool, and other blades are pushed back into the same place and position between the drawing-blocks and clamped there in the described manner to be in turn heated under pressure and withdrawn in the same manner. By this method a n umber of knives are smithed, draw-tempered, and straightened at one and the same time and by a single operation, and so made ready for grinding. If drawing-blocks of the type shown in Fig. 5 be substituted for the described blocks of the type shown in Figs. 1, 2, and 3, the substituted blocks will be supported by the upper screw-rods 3 and 5 in ears 12 and 15, respectively, and the base-plate 9 may be dispensed with and removed without radically aecting the operation or character of the invention.

Such being the construction and operation of my invention, I claim- 1. A series of drawing-blocks, which are adjustabl y held near each other, and are adapted to admit separate blades between them, in combination with a clamp, which is adapted to press the blocks and the work collectively together, and a base-plate, which is adapted to support the blocks, the clamp and the work.

2. A series of drawing-blocks, which are adjustably arranged near together between two clamping-plates, in combination with a screwclamp, and a bearing-block, having two terminal feet, and adapted to distribute upon one of the clamping-plates the thrust of the clamp-screw.

3. Two clamping-plates,which are provided with marginal ears, and a number of drawing-blocks, which also are provided with marginal ears, and are held adjustably near each other between said clamping-plates, in combination with a number of screw-rods, which pass through the ears of said clam ping-plates, and of one of said drawing-blocks.

4. Two clamping-plates, a series of drawing-blocks between them and clamping mechanism, which has a marginal engagement with said plates and blocks, in combination with a base-plate, supporting the free end of said blocks. p

5. In a clamp for cutlery, a pair of clamping-plates, and mechanism for actuating the same, in combination with a series of drawing-plates, which are loosely confined between said clamping-plates, and are beveled in different directions to lit the work.

In testimony whereof I hereunto set my name in the presence of two witnesses.

GEORGE E. SMITH.

Witnesses:

XVILLARD EDDY, JOSEPH P. SMITH.

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