US278684A

US278684A - Saw-swage

Info

Publication number: US278684A
Authority: US
Publication date: 1883-06-05
Anticipated expiration: 1900-06-05

Description

(No Model.) 2 Sheets-Sheet 1. M. OOVEL.

SAW SWAGB.

No. 278,684. Patented June 5,1883.

N. PEYERS; Pnm-uinu nwwr, Washhgton. a. c.

2 Sheets-Sheet 2. M. OOVEL.

SAW SWAGE.

Patented June 5, 1883.

(No Model.)

INVEN B ,Ww w/M s x l n PhnloLimogrzphor, Wahin bon. n. a

UNITED STATES.

PATENT OFFICE.

MILO OOVEL, or cnreneo, ILLINOIS.

sAw-swAeEP SPECIFICATION forming part of Letters Patent No. 278,684, dated June 5, 1883, 1

Application filed April 18, 1882. (No model.)

To all whom it may concern:

Be it known that I, MILO GOVEL, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Saw-Swage; and I do hereby de clare the following to be a full, clear, and exact description of the invention, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming a part of this specification.

This invention relates to improvements in devices for drawing out and spreading the points of saw-teeth; and it consists of certain novel features in the construction, arrangement, and operation of the several parts, as will be hereinafter more fully set forth in detail, and pointed out in the claims.

Figure 1 is an elevation showing the front side of a device embodying my improvements. Fig. 2 is a view with the front plate removed, showing the interior arrangement of the mechanism and relative position of the saw; Fig. 3, a view of the back side; Fig. 4, a top or edge view; Fig. 5, an end view; Fig. 6, a vertical transverse section in the plane 6 6, Figs. 2 and 4-; Fig. 7, a detached view of the upper die. Figs. 8 and 9 show the different shape or form which may be given to the points of the teeth by this device.

Referring to the drawings, A represents the front plate, and A the back plate, which are bolted together to form the body proper for the support of the operating mechanism. These plates are of an irregular shape, and are 1101- lowed out on the interior to form the recess (1, (shown in Fig. 6 of the drawings,) the edges having a close bearing, as shown in Figs. 4 and 5 of the drawings. The opposite end of the body from the op erating-handle A is provided with the slot a for the insertion of the saw A as shown in Fig. 4 of the drawings.

The shaft B passes through the body of the device, the outer projecting end being provided with the crank or handle A", while the opposite projecting end is provided with the camdisk B. This cam-disk is cut away in the manner shown in Fig. 4 of the drawings. On

that part of the shaft B between the plates A A is placed the cam B shown in Figs. 2 and 7 straight dress.

6 of the drawings. This cam has frictional contact with the hook end of the eccentric lever 0, the opposite end having formed integral therewith the bearing-pin B projecting from each side, and having bearings in the .parts A A. This end of the lever O is recessed, as indicated by the dotted lines in Fig. 2, for the reception of the upper die, 0, the slightlyprojeeting end of which is shown in Fig. 7 of the drawings; This die is adjusted by means of the set-screw (6, the outer face or plate, A, being provided with the aperture B*, (shown in Fig. 1,) for the purpose of giving access to the adjusting-screwa The lower die consists of the round pin 0 the ends of which are secured in the two parts composing the body of the device by means of the set-screws a at, which prevent the same from changing its position.

The saw is securely held in position, during the process of swaging the teeth, by means of the clamping-bolts C O, which effectually prevent the saw from backing out when the" dies are brought together. These clampingbolts also serve as a gage to spread the tooth more,on one side than on the other, or to dress a straighttooth. This is done by simply turning in or out the clamping bolts, so as to throw the point of the tooth a little beyond either side of the upper die or retain the tooth in the center of the die, so as to produce a The different forms of teeth capable of being produced by this device are shown in Figs. 8 and 9 of the drawings.

The lower die, C", being round in form, imparts to the tooth the hook shape shown in Fig. 8 of the drawings. A. greater or less amount of hook may be given the tooth, as may be required, by moving ,the lower part of the saw in or out, the exact proportion being gaged by means of the adjustable guide 1), against the end of which one of the saw-teeth should rest.

The clamping-bolt 0* passes through the opposite or long end of the lever is providedwith the rotating beveled roller 1)", which has bent around the same, the bottom of the V' frictional contact with the cam-disk B. As the cam B is rotated an. oscillating movement is imparted to the lever D, which serves to bring the clamping-bolt O in contact with the saw at the proper time. is also provided with the V-shaped spring d,

having contact with the clamping-bolt, while the ends are somewhat extended, bent over at right angles, and secured in the back plate, A, as shown in Fig. 3 of the drawings. This spring is retained in place on the clampingbolt by means of the pin (1'' inserted in the clamping-bolt C, and which serves to assist in returning these parts to a normal position. The mechanism does not make a complete revolution, but about a one-half turn in. the plane of revolution.

As shown in Fig. 1 of the drawings, the handle is in a normal position. The operator, taking hold of it, moves the same inward and downward, so that it stands at about the opposite point. This movement brings the thickest part of the cam B in contact with the inner and under side of the back end of the eccentric lever G, forcing this end upward and causing a downward movement of the opposite end, which carries the upper die, 0, and bringing the same in contact with the tooth of the saw inserted between the dies. This same movement brings the thickest part of the cam B underneath the beveled roller 1)", raising this end of the lever D, lowering the opposite end, and bringing the clamping device in contact with the saw. These cams are set on the shaft B with reference to each other, so as to bring the clamp in contact with and fasten the saw before the dies are brought to a bearing on the tooth, and as the operating-handle is returned to a normal position the saw is released from both the clamp and dies and is ready to be moved so as to bring another tooth in position to be operated upon. By this arrangement an automatic movement is imparted to these parts.

The device should be secured. to an upright This clamping-bolt post by means of bolts passing through the apertures (1 d This device is adapted for either straight or circular saws. g

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the eccentric lever 0, provided with. the pin B projecting from each side at right angles, of the adjustable die 0, recessed into the front end of the eccentric lever, substantially as set forth.

2. The combination, with the inner hook end oft-he eccentric lever O, of the cam B, the shaft B, and the operating-handle A, whereby the upper die is brought in contact with the saw tooth resting on the lower or stationary die, substantially as set forth.

3. In a saW-swage as described, the round stationary die 0*, whereby a greater or less amount of hook is given to the saw-tooth, as may be desired, substantially as described.

at. The combination, with the operating-shaft B, of the cam- B, the beveled friction-roller b, and the oscillating lever D, provided with the bearing-pin b, substantially as described.

5. The combination, with the clamps C" C, of the plates A A, the spring (I, the pin (1, and the oscillating lever D, provided with the pin 1), having bearings in the lugs I) 1)", sub stantially as described.

6. In a saw-swage as described, the combination of the following elements, consisting, essentially, of the two plates, A A, bolted to gether and provided with the interior recess, a, the operating-shaft B, the cam B", the eccentric lever G, the upper adjustable die, 0, the lower stationary round die, 0 the clampingbolts C C, the oscillating lever D, and the cam B, all constructed, arranged, and operating substantially as described.

MILO COVEL,

\Vitnesses L. M, FREEMAN, L. B COUPLAND.