US12770A - Kaxlofi - Google Patents

Description

- The "like" imarlrshof :reference tlm-Ha comme;

LQDCCMETASSLGN@ mo rum-nn NAELQR ,rottenniemand l Letters Patent No.` 12,7710, 4dated prima 1855.

Zaanwhom,amayeaem a i 1 Bejitknownyithat "Joran lGoMsfrocK, of

Glane :that the` followingais alflullyclear, and

eziactyfdescrilptiony';ofi` the-constnuction and operation ofthe same, reference4 being had toflthe lanneiredldirawing, making par-t `of this y ,l speciication,\wheren-` m i fFigureflyisiaplan, Fig.j2, isa sideeleva-,

tion, Fig1 3 isanfelevation atgithe end A, and

Fig; il, is any elevation lat the end `B, colflectively showing f l y p improved forging hammer as ready "for use.` f

same *part-s; l 1

The nature of mysaidinventionconsists 1 in so"` applying a loose `belt with cams and otherparts, that aforginglhammer `can be brought-to strikeheavybor light `blows to finish work,` or the` hammer be entirely "stopped,` although `the power which drives p "thefpafrts continues itsinotion; thus placing "the attendantfin possession of facilities for causing the power tostrile the blow desired, throughfthe interventionf of simple mechanical 1neans.`

@,ls a pulley on a` shaft 1, supported in suitable bearings, :towhicha continuous roi tation isi given by `competent power; a loose belt 2, passes fromcthe pulley a, around a pulley 7), on a shaft 5,"set \in bearings 3, 3;

and nearthe end ofthisushaft o, a fly wheel `(his attached so as to causeasteady rotation of theshafthc.` fil l i y y e, `is apulley hungon-aframe 4, moving on centers 5, `which when brought against the belt 2, tightens the sameon its pulleys;

`1 this tightener is drawn back from the belt; by a spring 6, when not acted on by a rod 7,

to a right anglelevergylon a fulcrumw?, to

the end 8, of which leverfg, the foot of the operatorie applied to tigh f 1 the belt 2, and 1 causethe shaft c to be rotated.V

` "Whenit is desired to stop the revolutions ofthe shaftc, the operator removes his foot from the end 8 ofythe lever, and allows the spring 6to draw baclrthe tightening p-ulley,

New `London and ave invented;` and denote the :break lblook 11, is Aattached .as shown in Fig. `3, thus` :thelrevolutions of the shaft c, are

`entirely under the control fof the operator for when :butta light pressure isgiven to the tightening pulley the belt `2 will ,partially i slip thrus the speed can be :regulated or the shaft c, stopped. l

C, `iis the -bed ofthe forging hammer sup portedon suitable foundations V'cir-.iewith the dieron the hammer :if required;

`at `the .other 4end of the ,bed short standards slettsin the standards `finto ,a plate17.,-b,y `thlsmeans the frame 0., and hammer :can be :raised for lowered ,as desired.

18, 18, `are `center screws passing `through the'frame lo,` into the -ends of the ,ham-mer tnunnions p, to which the slings cer handle g of the hammer r, are attached and s, is the movable face or die of the hammer.`

o, is a cross piece between the slings g, to

which a bar 22, and screw shackle are at-V tached connecting the same to a spring pole or any similar means for lifting the hammer `to the required height; the screw shackle affording a means for so doing, with great accuracy.

t 1s a cross y m, Jlsthe forging block or \@lie,whiclimay 3be1ma'de adjustable las usual, .so as to ooinbar over the slings g, attached to `them in any `suitable manner Vso that it can be moved if desired nearer to, or farther from the trunnions p, so as to vary the leverage on the hammer. To this cross bar t, a rod 19 is connected that passes down to the screw shackle 20, which connects to the horizontal lever 11(see Fig. 3) that is jointed at 21, by a fulcrum on the foundation D, and the other end passes across beneath the shafts. a j

On the shaft` c, over thelever u, cams z', and 1, are fitted either to slide on a square part of theshaft'or on a key, and 12, is a fork passing1 into a neck between said cams; this fork ison the end of a rod Z, running to a bent lever 13, the horizontal arm of which terminates asa stud 15, passing through a hole inthe footfpiece;`

14 is a contractile spring which unless ,otherwise acted on keepstheflongest camz' over the lever u. y l

It will now be apparentthat the operation of these parts is, that when the attendant presses down the end 8 of the lever g" the hammer "is moved with a speed proportioned to the tightness of the belt 2 the cam z', by its length giving a heavy blow; the force of which blow canbe regulated by the screw shackle 20, and the spring fw, lifts the hammer again each blow; and when the forging is nearly complete or requires but slight blows the workman presses down the end 15 of the lever 13, which slides the cams i and il, along on the shaft c, bringing the cam 1, into operation, which being shorter does not strike so hard a blow but one suited for finishing the forging.

I do not claim a tightening pulley in itself as this is well known, but I am not aware that a tightening pulley and break have ever before been used as herein set forth, by which the speed of the blow is regulated by the tightness of the belt or the same is stopped entirely by the break, while the motive power still propels the belt. And I am well aware that a hammer has been so set as to be drawn down to give the blow and then raised again by a spring, therefore I do not claim the same in itself, and I am also well aware that different sized cams have been used for raising a forging hammer therefore I do not claim the different lengths of cams in thelnselves, but I am not aware that two or more cams of varying lengths have ever before been combined with a lever and adjustable screw schackle to pull down a hammer and give the blow, whereby I am enabled to use a definite amount of motion given by a cam, to forge articles of vario-us sizes, the screw shackle giving the facility for regulating the point to which the hammer is pulled.

Therefore what I desire to secure by Letters Patent is- 1. I claim the method herein described and shown for regulating the speed of the blows given by a forging hammer, by the use of a tightening pulley combined with the break applied to the iiy wheel substantially as specified.

2. I claim the method herein described and shown of regulating the amount which a hammer is drawn down to give the blow by rotating cams, by combining with said cams and hammer the adjustable screw shackle 20, and lever u, the whole constructed and combined substantially as specified.

In witness whereof I have hereunto set my signature this twenty-eighth day of February, 1855.

JOHN COMSTOCK.

Witnesses:

H. W. LANPHER,

LEMUEL W. SERRELL.

Images