US112979A - Improvement in saw-gummers - Google Patents

Description

@dimitri (fenetre :It-wt @Mitra NATEANIEL E. svrONE, DEOEASED, (AMANDA s'rONE AND BENJAMIN HOL-.

BROOK, ADMINISTRATORM OE CHICAGO, ILLiNOIs. i.'

Letters Patent No. 112,979, dated `llllal'ch 21, 1871; antedated March 14, 1871.

IMPnovlawlEnT m saw-culviMi-as.

The Schedule referred to lx1-these Letters Patentand maling of the same.

y Figure 4, adetached'view, showing the journalbearings of the cutter; and

Figure 5, views of saw-teeth, -showing the effectof i the set-screw.4

Like letters refer to the same parts in all of the figures.'

This invention relates to that class of saw-gummers which is used with'rotary cutters; and

Its nature consists in the application of a set-screw, so that the teeth of the saw will be cnt the same distance from the'points, however irregular the spaces between the teeth-may be; in the application of a ro tilting shaft, carrying with it the Arotary cutter; and in the application of' a stop to limit and determine th'e cnt for each tooth of the saw.

To enablel others skilled in the art to make and use my invention, I will now describe its construction and operation. j

The frame or case F is made of cast-iron, usually cast in a single piece, andV ofthe form and dimensions shown, the 'drawing being full size. y

Inrthe curved portion F of the frame I place the shaft A, which is cut away in the middle, as shown at' A, figs. 2 and 3, and-has its bearings in the posts F.

At the outer end of thisshaft I attach a toothed or. cog-wheel, A', which isperated by the worm-thread C' on the shaft B, y p

The wheel-A' is usuallycast with the shaft, but it may be made separate and be attached by screws or bolts. y

At the side of this shaftI out in square recesses, as

shown at S, iig. 4, which recesses are provided with "shaft, as shown .at R, iig. 4, and the other in a hole in the neck of the shaft, as indicated by the dotted lines in tlg. 1.

` yIn these bearings I place the cutter-shat'tl, which is provided with the cutters H. The shaft I is provided' with elongated bea1ings,so that the cuttercan lbe moved back and forth so as to. utilize its entire length; otherwise ,it wouldcut continually at one point and soon wear out.

The inner end projects out sufficiently far to'ai'or-d a proper attachmentfor'a crank, T.

' A t the inner end of the sh ft uniform depth, the depth being regulated by the pin 1?,- which is placed in such one of the holes Q as may be desired, or according to the size ofthe saw-teeth.'l

The stop N is so made and attached that it can be folded into the opening R for the purpose of permitting the withdrawal of the shaft A for the purpose of inserting a new cutter, o'r the taking out of a cutter for the purpose of sharpening it.

In order to facilitate -this withdrawal I' hang th Iworm-shaft B in a movable frame, C.

This frame is furnished with suitable bearings for the'shaft B, and is attached to the frame F bythe screw B, which acts also as a pivot, and by the screw E, which passes through a slot, D.

By loosening the screw E the frame O can be thrown back so as to disengage the worm and wheel, when, by folding in the stop N, the shaft A can be drawn out from this side of the fralne'ancl the cutter-shaft I taken out. y

When'the shaft is-replaced the frame C is turned' so as to engage the worm with the wheel, which, b y reason of the concave `form of the faceyof the cogs, operates acheck to prevent its falling or working out when the screw E is tightened.

At or near the middle of the crossbar of the:

y frame l insert' a set-screw, K, which is or may be provided with, a lock-nut S'. 'Ihis screw is provided with a notch at the inner end to receive the point of the saw-tooth, so as to prevent its being bent or dulled.

When this 'set or gauge-screw is set, as shown atV tig. 3, the tooth will 'be cut as shown at2,in lig. 5; and when it is run up against the bar 11"', the tooth will he cut as shown at l.

The saw-plate is placed in the opening or groove L', and the machine is secured to it by the thumb-screw G. In operation, when gummin-g small teeth, when the opening between thenis about the size ofthe cutter H, the pin P is set in the-upper hole and thefgaugescrew K run down until it comes nearly in contact with th'e shaft A. -The gulnmer is then placed in position and the crank I turned without revolving the shaft A.

When larger teeth are to ho gramniell, thegaugescrew is set so as to give thedesired point, and the pin It placed in one of the lower holes.

The machlleigthe,nd placed and secured in position, and the crank is taken in one hand and the shaft B iu A I placca movableV v stop N, which limits the movement of that shaft, and

makes the cutting between each toothof a saw of a by changing the size ofthe wheel or the angle of the cogs that this part of the machine will not interfere with the withdrawal of the shaft.

Having thus fully described my improved -saw gommer,

What ters Patent, is- Y 1.,The-'revolving shaft A, in combination with the I ciaim as new, and desire to secure by Letrotary cutter, substantially as described.

' 2. The stop N, in combination with the shaft A, frame F, and pin P, when constructed and operating substantially as set forth.

3. The combination and arrangement ofthe shafts A and I with the wheel A.' and the worm B, substantially as described.

4. The pivotcd frame O, when so constructed and attached that the Worm can be disengaged or adjusted, substantially as specified.

-5. The combination and arrangement of the shaft A, provided with the adjustable bearings M for shaft l', cutter H., Wheel A', worm B, gauge-screw K, and stop N with .the frames F and C, substantially as and for the purposes described. o Y

' NATHANIEL F. STONE.

' Witnesses:

L. L. BOND,

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