US372669A - Saw-hammering machine - Google Patents

Description

(No Model.) K

W. GOWEN.

SAW HAMMERING MACHINE.

No. 872,669. Patented a Unrrnn stares fureur @tripa WILLIAM GOVEN, OFVVAUSAU, VISCONSIN.

SAW=HAMMERING MACHINE.

SPECIFICATION forming part of Letters Patent No. 372,669, dated November 8, 1887.

Application filed January 18,1887. Serial No. 224,701.

T0 all whom, it may concern:

Beit known that I, WILLIAM GowEN, of Wausau, in the county of Marathon and State of Visconsin, have invented certain new and useful Improvements in Saw-Hammering Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

The object of my invention is to hammer a saw with facility and accuracy and to open up77 or loosen the same at the center, and thereby produce the desired tension in its periphery.

It consists, essentially, of a reciprocating hammer, a spring arranged to impart force to the blows of said hammer, mechanism for supporting, rotating, and moving the saw over the anvil in proper position to be operated upon by the hammer,and means for adjusting the force of the'blows of said hammer.

In the accompanying drawings like letters designate the same parts in the several figures..

Figure lis a side elevation of my improved machine. Fig. 2 is a plan view of the same. Fig. 3 is a side elevation of the crank-wheel, pawl, and a portion of the ratchet-wheel by which the saw is rotated and moved upon the anvil; and Fig. 4 is a cross-section of the hammer-supporting arm and spring, showing the clevis and adjusting-screw by which said spring is secured to said arm.

In hammering saws by hand,requiring skill and experience, as heretofore practiced, the work could at best be but imperfectly done, since it is impossible to strike a series of blows by hand with precision and uniform force and to move and hold the saw with that firmness and accuracy essential to produce the best results. y

The foregoing requisites for successful haar mering areattained in the following-described machine.

IWI is the frame, which may be made of any suitable material, form, and construction to support and furnish bearings for the various essential parts of the machine. Upon one end (No model.)

of the frame M is supported an invertedL shaped arm, F, formed at its overhanging end with a sleeve, in which the squared shank of the hammer A is arranged to reciprocate vertically. In bearings provided therefor on said arm F is supported the horizontal shaft c,pro vided at the end adjacent to said hammer A with a cam, c,which works with a projection, a,on said hammer. Upon the opposite end of the shaft c is fixed the crank-wheel E, and adjacent to it the driving-pulley C and pinion I.

A spring, G, composed of the required number of leaves to give it the desired stiffness, bears at one end upon the upper end of the shank of hammer A, and is secured or rests at its opposite end in a recess formed therefor in the arm F. At an intermediate point the spring G passes through a clevis, g, which is adjustably secured to the arm F by a bolt, f, passing through a vertical opening in said arm, and aunt, f', as seen in Figs. l and 4.

Upon a crossgirt, M, of the frame M is supported the anvil B in position to receive the blows of hammerA centrally. Upon a shaft, H, supported in bearings in frame M below the anvil B and parallel with the cam-shaft c, is loosely mounted a bevel-gear, h, which works through an opening inthe sawsupporting carriage K, with a similar gear, It, mounted upon an upright journal provided therefor on the upper side of said carriage. The carriage K is supported and arranged to be moved toward or from the anvil B upon ways m m, formed upon or secured to the side rails of frame M, parallel therewith and with said shaft II. rlhe gear h is prevented from turning upon the shaft I-I by a spline or feather, while it is moved lengthwise of said shaft and retained in engagement with the gear k by projections 7c le on the under side of the carriage K. The huh of the gear k is provided with ath readed centerpin or projection, upon which the saw is secured by means of a collar, It, and nut k3, as seen in Fig. l.

Upon a crank-pin, c, which is adjustably secured in a diametric undercut groove in crank-wheel E,isjournaled the reversible pawl d, working with the reversible ratchetwheel D on the adjacent end of shaft H. Vhen desired, a continuous rotation of shaft II andthe saw supported upon gear k may be produced IOO v by raising the gear I on said shaft into en- 4 saw the desired distance from the anvil.

gagement with the pinion I, as shown in Fig. l, in which event the pawl d is thrown out of engagement with the ratchet-wheel D. For the purpose of throwing the pinion Iand gear I into and' out of engagement, the shaft H, adjacent to gear I,may be supported in a vertically-adjustable boX. (Not shown.) Upon the hub of the gear 7c is formed atooth or spur, Z, arranged to work with a rack, L, adjust-ably secured to the cross-girl; M', parallel with the ways m m.

My improved machine operates as follows: The saw having been secured to the gear 7c, as shown in Fig. l, the carriage K is adjusted upon its ways m m to bring the center of the The machine is set in motion and the hammer A alternately lifted and released by therotation of the cam c' acting upon the projection a of said hammer. With each elevation of the hammer the spring G is strained, and,when

released by the cam c', imparts by its recoil force to the descending blows of said hammer. By turning the nutf on the adjusting-boltf, the tension of the spring G and the consequent Y force imparted to the blows of hammer A may be regulated as desired. The pawl d, working with the ratchet-wheel D, produces an intermitting rotation of the shaft H, gears h and k, and the saw supported upon said gear k. By moving the crank-pin e toward or from the center of the crank-wheel E, the throw of the pawl d and the angular movement of the saw may be regulated as desired. rlhe direction of the rotation of the saw may be changed by reversing the pawl d upon the crank-pin e. With each revolution of the gear 7.o 'a circular series of blows is struck by hammer A upon the saw, and the tooth or spur Z on said gear k engages witha tooth on the rack L and moves the carriage K and saw a certain distance toward or from the anvil, (according to the direction of the rotation of shaft IL) causing the hammer to strike the saw in a circle concentric with the blows previously dealt thereon. If, after traversing the face of the saw once in the manner described, the desired effect is not produced, the rack L may be slightly shifted 'endwise to divide the intervals between the concentric series of blows previously made by the hammer, and the operation then continued till the desired tension iszsecured in the rim of the saw.

In the application of my invention to practice, various modifications may be made in construction and arrangement without departure from its spirit or the principle of its operation.

1. In a saw-hammering machine, the combination, with the hammer and anvil, of a sawsupport movable toward and from said anvil, substantially as and for the purposes set forth.

2. In a saw-hammering machine, the combination, with a hammer and anvil, of a sawsupporting carriage and mandrel movable toward and from said anvil and mechanism arranged to impart a rotary movement to said saw, substantially as and for the purposes set forth.

3. In a saw-hammering machine, the combination, with an overhanging supportingarm, of a saw-supporting device, an anvil, a reciprocating hammer working in a sleeve formed therefor in said arm, a leaf -spring bearing at one end against said hammer and at the other against said supporting-arm, and an adjustingscrew connecting said spring with said arm, substantially as and for the purposes set forth.

4. In a saw-hammering machine, the combination, with a hammer and anvil, of a rotary saw-support and a reversible pawl and a rightand-left ratchet-wheel connected by suitable mechanism with and arranged to produce an intermitting rotation of said saw-support, substantially as and for the purposes set forth.

5. In a saw-hammering machine, the combination, with a hammer and anvil, of a rotary saw-support, a right-and-left ratchet-wheel connected with said support, a cranlzpin adjustable toward and from thecenter of its shaft, and a reversible pawl journaled upon said crank-pin and working with said lratchetwheel, substantially as and for the purposes set forth.

6. In a saw-hammering machine, the combination, with a hammer and anvil, of arotary saw-support mounted upon a carriage and provided with a spur or tooth, and aiixed rack arranged tobe engaged by said spur or tooth and thereby move said carriage an interval to each revolution of said saw-support, substantially as and for the purposes set forth.

7. In a saw-hammering machine, the cornbination, with a hammer and anvil, of a carriage movable on ways toward and from the anvil, a rotary saw-support mountedon said carriage and provided with a spur or tooth, and a stationary rack capable of longitudinal adjustment, substantially as and for the purposes set' forth.

8. In a saw-hammering machine, the combination, with the hammer and anvil, of a sawsupporting carriage movable toward and from said anvil, mechanism arranged to impart a rotary movement to said saw, and an offsetting device arranged to move said carriage at intervals toward or from the anvil, substantially as and for the purposes set forth.

9. In a saw-hammering machine, the combination, with a hammer and anvil, of arotary saw-support and reversible feeding mechanism arranged to rotate said saw in either direction, substantially as and for the purposes set forth.

10. In a saw-hammering machine, the combination, with a hammer and anvil, of a rotary saw-snpport, reversible mechanism arranged to rotate said saw in either direction, and an offsetting device arranged to move the saw toward or from the anvil, substantially as and for the purposes set forth.

IOO

IIO

binatiou, with a hammer and anvil, of a rotary my own I afx my signature in presence of two saw-support, mechanism for imparting an iu- Witnesses. termtting rotation to said saw-support, and

T T gears arranged to produce continuous rotation w ILLIAM GOVEB 5 thereof, substantially as and for the purposes XVtnesses:

set forth.

OHAs. L. Goss, In testimony that I claim the foregoing as GEORGE M. GOLL,

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