USRE9663E - simonds - Google Patents

Description

2 Sheets-Sheet, l.

. G.' F. SIMONDS.

Assignor to THE SIMoNDs MANUFACTURING Co. ering and Forming Artl 'cles of Steel.

ued April 12,1881.

Temp No. 9,663.

2 Sheets-Sheen z.

Rgssuedl April .12, 188|. x

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L/ 04% (im GEORGEF. 'Si'.MONDS, 0F FTCHBURG, MASSACHUSETTS, ASSIGNOR TO THE Sill/[UQNDS MANUFCTUHiNG- COMPANY, F SAME PLAGE.

lTEMPERNG AND FORMING ARTICLES OFISTEEL.

'SPECIFICATION forming-.part of Beissueii .Letters Patent No. 9,668, dated April 12, 1881.

(Jrigiuai No. 138,195, dated Match U, 15477. Application t'ur reissue flied September v10, 1518. 'I f .To all whom it may concern y Be it known thati, GEORGE 1i". Sumar/s, of Fitchburg, Massachusetts, have invented certain new and ,useful Improvements in App-a.. 5 .ratus l'or Tempi-.ring and liorming,` Articles o" Steel, et' which the following is a i'nli, clear, and exact description, reference being' had to the accompanying drawings, inaliingf; a part of this specification, in which- Figure 1 is a perspective view ot' a tempering oven with iny improvements attached. Fig. 2is a longitudinalsectionthrough y i/ et' Fig. 4. Fie'. 3 is a vertical crosssection through z s ot' Fig. l. Fig. 4 is ahorizontal section through al .1: of Fig. 2. Fig. 5 represeuts the rear ot' one ofthe formers.

lilyinventiou relates to the hardening', tempering, iiud bringing' to their ultimate l'orms articles oi' steel, or ot' steel andiron comoined, 2o and is an improvementou'latents No. 151,107, dated May 1U, 1S74,and1\'o. 109,736, dated liovember 9, 1575; and it consists in the process ot'adjusting the fast and lo'v'isc7 in a'saw, and iu several combinations oil devices, hereiuai'ter explained and claimed, whereby saws may be tempered and straightened without the usual process of hammering.

1`o enable others skilled in the art to make und use my invention, I will proceed to de- 3o scribe the exact manner in which ,'I have car` l ried it out.

vIn the said drawings, l ifi. represent the walls of au even, llhe root',( l the iire-box,.u1d v Dthctemperiugandformingchamber. Above the tire-box is placed the heat distributor o, shaped'in erosssection, as shown in Fig". 2, to equally distribute the heat in its passage to the tempering and forming chamber. rlhe llat iirepreot' tile which l liavehcretol'orc used for 4o, this purpose, it' not set with creat precision horizontally, was liable te distl ibute the heat uuequaily to the sides el' theiin-niing-chamber, and thus defeat the obieet soughtto be aecomplished by au even distribution ot` heat. To overcome this diiiiculty i .i'erux the distributore as shown in cross-section in iiia. 2 oi' the drawings, the lower point being; placed longitudinally exactly over the center et the iire box (l. This peculiar forni of distributer 5o lind, by actual experiment, is a creat improve nient upon my former patents. The distributer n is constructed of" equal width ou its upper flat. surface with the t'oiiining-chaniber D, and having' 0n each side a tine, u", opening diy reetly under the open tlue u o', extending' 55 along the outer side and tothe top of the` Y ibrniingchamber D, to alloiv the free passage y ofthe heat around all parts ot' the chamber, the said tiues being severally regulated by the v dampers 2 2. The distributor u is cast with 6o,v an air-space, G, through its center, as shown.

This prevents the distributer from throwing too much heat into the oven by radiation.

The teuipering'even l malte according' to my Patent No. 169,730, or iu any other desirable Way.

.The formers are suspended in the chamber, as shown in Fig. 2, by means ot' revolving;` shafts l: b', provided `vith necessary bearings in the frame-work E E. The` outer ends of 7o these shafts are provided with screws f j', i f' which they can be moved longitudinally, and the ibi-mers cau be closed or opened within the ieinperingchaniber. A Y

By means ot' the wheel F the shaft `buiay 75 be easily revolved, and when the {oi-mers are brought in contact or closed on au article to be tempered it is evident that the shaftb' willalso be, caused to revoli'e with the shaft l, and the tivo f'orniers may be revolved within the So chamber 1). This revolution of the t'orniers. may become desirable, in order to secure more certainly auniform temperature. The great purpose ot' this construction is to piace the article to be tempered and formed entirely out of the reach ot any draft, stated in my Patent No. 169,736, and thus secure an evenuess oi' heat essential to success.

The heat iu the surrounding chambers Il may be readily regulated or directed from one 9o portion ot' the chamber D to another by means oi' the dainpers il 2 andiiues o' a'.

ily nie-.ins ol` the iiues and dauipers, placed so as lo completely .control the heat in its passages to and around the tcmpering-oveu, I :un enabled to throw the heat into the center et' the oven or onto the outer edge or ou any desired partei' the saw, and thus adjust at pleasure the exact tempering of its diti'erent portions, which process ofladjustiug the fast 10o and loose is anv essential part of my present invention. If an uneven strain is desired between the center and periphery-that is, if for any other reason it is desirable to have the saw loose in center or loose between center and periphery- I accomplish it and yet leave the saw on any given circle uniform in its ten sion, which cannot be the result ot a saw hammered.

The terms fast 7 and loose, as applied to the manufacture of saws, are well understood by those skilled in the art, and result from an irregular tcmperi n g ofthe saw, the more highlytempered parts being termed the fast77 and those of lower temper the loose. v It is evident that-bythe heating of the saw during its operation the expansion of the steel will be influenced by the fast and loose, and hence it becomes a matter ot the greatest importance to be able to-adjnst this fast and loose in the saw, in 'order to adapt it -to its particular work, as before stated.

When the saw or article to be tempered and brought to its ultimate form has been properly hardened, and is placed between the formers c c, the door is closed andthe article is secured in position bythe gradual movement of the screws ff until the pressure is sucient toA bring the piece to the desired form, 4where it is held subjected to the perfectly uniform and desired amount of heat until the article takes a permanent set to 'the required form, when it can be removeth'to make place for another.

My formers c c are of a novel construction, asshown in Figs. 3 and 5. 'The face of the former, instead of being a smooth ilat surface, is grooved in sncli a manner as to divide it up into numerous small surfaces resembling somewhat the face ot' a waffle-iron. Behind this face is a series of radial ribs, lc, to strengthen and support the same, and the formers are perforated thickly with small 'holes 3, while their flanges are slotted atetto admit free passage for the heat to all parts of the formers and secure a more uniform temperature.

In further aid of securing a perfectly uni form temperature in the tempering and forming oven, `I combine with it the use of the blower ,P at the junction of the two air-pas; sages p p. These passages lead into the oven, and by means of the blower a current may be produced through the passages which will tend to secure a uniform temperaturel inside the oven D. It is evident that'the blower can be pla-ced in a variety of positions to effect the same result; therefore I do not limit myself to the position ot the blower as-shown tin the drawings.

The leading object of this invention, like my inventions upon which this is an improvement, is to produce a perfect saw .without the necessity of hammering.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isp 1. The process herein described ot' adjusting the fast and loose in a saw by throwing the fheat on the center or the outer edge or on any desired part ot' the saw, the same beingr held to the required position, substantially as set forth.

2. Formers for tempering and forming artieles of steel in combination with a fan or blower toeqnalize the heat, substantially as described.

3. Formers for tempering and forming articlesot steel inclosed in a heating-oven in combination with a fan or blower, substantially as set forth. l n l 4. The distributer a, constructed with sharp downward point and with ogee sides,substan tially as described andA shown, in combination with a temperingoven, substantially as and for the purpose set forth.

5. The distributer a, provided with the fines a, in combination with the vertical dues u'Y and dampers, substantially as and tor the purpose set forth. 4 i

6. Formers constructed with perforations and ribs, as shown and described, in combi nation with an annealing-oven, substantially as and for the purpose set, forth.

' GEORGE F. SIMONDS. Attest:

Gunner: E. Downs, GEORGE E. Frisson.

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