US100312A - Gilbert munday - Google Patents

Description

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GILBERT MUNDAY, OF MONTEZUMA,` OHIO.

Letters Patent No. 100,312, dated March l', 1870.

IMPROVEMENT n IN SAW- GUMMER.

The Schedule referred to in these Letters Patent and making part of the same from the machine.

A is the base or. supports on which the frame of my machine rests.

B is the frame-work.

C C, the inner box or frame.

D, the tapering or cone-shaped bur or cutter.

E, the temper or feed-screw.

I I, the detachable blocks. Y

F, the wedge used to hold cross-cut or mill-sa ws up against the gummer.

K, a small slide-box.

This invention consists oi a sawgummer, whose parts are so arranged that the cutter or bur can be removed and others of different sizes and shapes used; also, in the peculiar form of the bur or cutter, and its inner frame or box carrying said cutter, arranged to slide back and forth ou tongues'or ways arranged within the frame B. V

4It further consists in a cutter or bur having both a reciprocating and rotary motion while operating upon the saw-tooth, as hereinafter more fully described.

In order to enable those skilled in the art to make and use my invention, lI will proceed to describe its construction and operation.

A is the base or platform, composed of two beams with cross-pieces a a, in which the frame rests.

B is the frame of my machine, having openings of arch shape on bot-h sides.

On the inner sides of the frameI B, at the top and bottom, are ways or tongues d d, on which the inner fraaie or box O, carrying the cutter D, is arranged to slide.

The frame, B of my machine vhas an' opening, G, through its center for the recept-ion of the saw, and is held in position upon the saw bythe set-screws b b c c.

The frame B may be taken apart, if necessary, by removing the bolts g g i t jj, used in holding the side pie-ces together, it frequently becoming necessary in order to repair the machine.

Arranged on eacli side of the frame B are arms h. h, four in number, which rest on eachside of .the sawblade, and having set screws c c.

Just above the arms h, on one end of the frame B,

are two additional set screws b l, which, if necessary, maybe used to further secure the machine 011 the saw. These screws clamp the saw-blade, and, by their number and arrangement, serve to elfectually prevent any wabbling7 or reeling of the tool, during which movement tends to make an irregular edge on the sawtooth.

Above the screws b b is a wedge F used onl when l l b 1 1 gummmg cross-cut or mill-saws, for the purpose ol holding the saw firmly up against the cutter D, and is removed when operating upon circular saws.

Toi-king in the frame B is an inner frame lo r box, 0, carrying the gummer or cutter I), said frame having grooves c c, to fit and slide upon the tongues or ways (l d, and operated bythe feed-screw E and handwheel H. By this means and with my form of cutter any size of tooth can be gunnned without removing the cutter or bur from the machine.

D is the bur or cutter, the cutting edges heilig spiral, bearing at an angle of about ten degrees to axis of the cutter, and which I make of tapering or 'cone shape, which greatly-obviates the necessity of cha-nging the cutter for-saws of diterent sizes, although, if necessary, there may be several forms or sizes oi' outters, and may be taken out and replaced at the pleasuse of the operator, it frequently being necessary to re' move the gummer for sharpening, as it will inconstant use become dull.

In order to make the cutter easily removable, I form at one end of the frame B blocks I I, which also act as a bearing for the shaft or crank-end J of the cutter to work, and are removable by means of the bolts g g running through the sideplates of frame B. I use a small box or journal, K, which supports the smaller end of the cut-ter D, and is intended to be 4used when cutters of smaller size are used.

The operation of my machine is as follows:

The machine isset on the saw by sliding the saw up through the opening G of the frame B, and is secured or held lirmly to its place by means of the screws c c b l). The inner frame orl box C carrying the cutter D is run back upon the ways or tongues d d by the action of the feed-screw E and hand-wheel H until the small end of the cutter is over the tooth of the saw. Then turn the crank until the frame is drawn the length of the cutter or bur D. Then loosen the set screws c c b b, and slide the machine back to the smaller end of the cutter. Again clamp the saw by means of the screws before mentioned, repeating operation until the desired depth in the tooth is obtained.

My machine can be set so as to out orA gum on a straight or curved line without the least danger of breaking any palt of the machine, all the strain being on the feedscrew and inner frame or box C.

The advantages of my machine overall others `are,

first, the cutter or bnr, which, instead of being drawn directly across the tooth of the saw, is gradually moved lengthwise through the machine and over the tooth of the saw, and, at the same time, having a rotary m0- tion; then, by cutting gradually during its movement until reaching the end of the cutter, making amore true and much smoother tooth than by the machines now inuse, and not tending to break the teeth of the saiv, `or dull and injure the cutting-edges of the gummer, as is frequently the case ,in gnmming large and heavy saws.

It is believed that by iny arrangement of saw-gumnier a more simple and eiicient device is obtained than those heretofore used, and capable of being more readily manipulated and applied to its work. The device as a whole is very simple and ctiicient, and may be constructed at a smaller cost, and Without the liability of getting out of repair', or having any part deranged by constant use.

Having fully described the construction and operation ot' my machine,

What I desire to claim, and secure by VLetters Patent, is

1. The tapering cutter or bnr D, having its cutting edges arranged spil-ally or nearly so, when operated substantially as set forth.

2, A cutter or bur, constructed and arranged as described, upon a fralne ot' a saw-glimmer, whereby said iuasie cutter may have both a rotary and reciprocating mo' tion while operating upon the saw-tooth.

3. The frame B, having ways d d, in combination with the box or inner frame C C carrying the cutter D, and operated by the feed-screw E, arranged substantially as described.

4. In combination with the inner box or frame C O the removable or detachable blocks I. I, substantially as described. l 5. The inner frame or box C C, arranged to slide back and forth in the fratrie D, said frame having removable blocks I I, box or bearing K, and carrying the cutter or bur D, substantially as described.

6. The frame B, having the slot or openin g G, wedge F, arms 7i h, set or clamp-screws b b c c, in conibination with frame O C and cutter D, arranged substantially as described.

7. Frame B, having the opening G, wedge F, arms I h h, set or clamp-screws c c b b, inner frame'or box C C with grooves e e working on the tongues or iva-ys d d, removable blocks I I, box or bearing K, shaft J, and feed-screw E, all arranged substantially as de scribed. Y

` GILBERT MUNDAY.

Witnesses:

DAVID H. RICHARDSON, Lewis MoDnRMorr.

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