US942531A - Saw-setting machine. - Google Patents

Description

A.- C. AMBLER.

'SAW SETTING MACHINE.

APPLICATION FILED umza. 1907.

Patented Dec. 7, 1909.

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' Patented Dec. 7, 1 909.

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SAW SETTING MACHINE. APPLICATION rum JAN. 24, 1907.

Patented Dec. 7,- 1909.

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UNITED STATES PATENT OFFICE.

ARTEMAS C. AMBLER, OF NATICK, MASSACHUSETTS.

SAW-SETTING MACHINE.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application filed January 24, 1907. Serial No. 353,768.

To all whom it may concern:

Be it known that I, ARTEMAS G. AMBLER, a citizen of the United States, residing in Natick, county of MiddleseX, and State of Massachusetts, have invented an Improvement in Saw-Setting Machines, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to a combined machine adapted for setting the teeth of saws, and also filing the teeth.

The machine is adapted, by change of position of a double cam, to feed the saw once during each two strokes of the file carrier when filing a saw as during one stroke of the file carrier the file is not in contact with the teeth of the saw; or at each stroke when the teeth are being set, it being remembered when setting a saw that the alternate teeth are bent in opposite directions.

The particular features in which this invention consists will be hereinafter more fully pointed out, and set forth in the claims at the end of the specification.

Figure 1 in side elevation represents a sufficient portion of a combined saw-setting and filing machine with my improvements added to enable my invention to be understood; Fig. 2 is a top or plan view of Fig. 1; Fig. 3 is a detail of the file carrier; Fig. 4 shows the setting means detached, and Fig. 5 shows the double cam in side elevation.

The base A of the framework has bearings for the main shaft A provided at one end with a fast pulley A and a loose pulley A the shaft at its opposite end having a disk A The base A has erected on it an upright A having a long bearing A that receives loosely a slide rod A The slide rod has connected to its ends by set screws B the file-carrier frame comprising arms B united by a tie plate B having a horizontal slot B presenting shoulders 2 at its opposite ends, said tie plate being shaped to present at its rear side a vertical way in which is secured by screws 3 a cam bar B The rod A receives loosely eyes C of a driving frame 0 having a depending leg C slotted at C said frame having two springs C that act on the tie plate and serve normally to press the file-carrier frame toward the driving frame. The file-carrier has two tubular file holders C, G, the holder C receiving the tang of a file, while the holder C, it having a three-cornered hole, receives the point of any three cornered file. Each file holder may be slid in the file-carrying frame to adjust them to the length of file, and the holders may be held in their adjusted position by clamp screws C The disk A has pivoted to it by a stud screw a, see dotted lines Fig. 3, a box shaped slide having outwardly extended flanges a that overlap the edges of the depending leg, see Fig. 1 where the slide is inserted in the slot C, said slide having a pin on which is mounted a roller a The driving frame has a projection a presenting parallel ends 4 and said projection is extended forwardly into the slot B of the file-carrying frame, the ends 4 contacting with the shoulder or ends 2 of said slot. As the disk A is 1'0- tated, the boX like slide moves the slot O reciprocating the driving frame, and as the eyes C contact with the upper ends of the arms B, the latter and the rod A are also reciprocated horizontally in a right line, and when a saw is being filed the roller a traveling over the cam-shaped rear side of the cam bar 13 swings the file-carrying frame outwardly and turns the rod A in its bearing against the action of the spring 0 The shaft A is shown as provided with a cam D that may be slid thereon and be held in either of two positions by a set screw D*. The cam presents a portion D having one throw point, see Fig. 5, and a portion D having two throw points, said cam when filing a saw being so located on said throw points. The cam is capable of adjustment on the shaft so as to bring either that portion having the single throw point D or that portion having the double throw points D into position to act on the roll D carried by a lever 0 pivoted at 0, which lever operates by its rocking movement to feed the saw forward, as will be presently described.

When a saw is being filed, and while the driving frame and file-carrier are being moved to the left, Fig. 3, the roller a occupies such position on the cam bar 13 as to enable the springs C to hold the filecarrier against the driving frame, and at such time the edge of the file does not con tact with the saw to be described, but as the driving frame and said carrier are being moved to the right, the roller a acting on the cam bar moves the file carrier forward so that the edge of the file contacts with the tooth of a saw during the entire stroke of the file carrier and file to the right. The depending leg C see Fig. 1, has a movable locking device A pivoted at a that occupies its dotted line position when a saw is to be filed, but when the teeth of a saw are to be set, as will be described, said locking device occupies its full line position, Fig. 1, and prevents the file-carrying frame from swinging backwardly and forwardly as described.

The file-carrying frame has two actuators b, b, shown as screws entering like screwthreaded lugs 6 extended from the tie plate B said actuators being held in any position in which they may be adjusted by set screws [2 The saw E whether to be set or filed is held frictionally at its sides near the roots of the teeth by an internal jaw E forming part of an upright secured to the bed of the machine by screws E a second jaw E mounted on a pivot E in the jaw E engaging the opposite side of the saw. To cause the saw to be clamped with greater or less pressure, as desired, I employ an adjusting device E shown as a screw entering a threaded hole in the jaw E and having a set nut E the end of said screw acting on a lug 8 of the jaw E The saw E is backed by a back gage (Z which is yoke-shaped and straddles the jaw E, as plainly seen in Figs. 1 and 2. The ends 10 of this back gage engage the backed edge of the saw E, as seen in Fig. 1, and said back gage is provided with a screw-threaded lug d, see dotted lines Fig. 1, which is received in a slot formed in the jaw E and which is engaged by a screw E rotatably mounted in said jaw, but held from longitudinal movement therein. By adjusting the screw E the position of the back gage can be adjusted along the jaw E and when in the proper position it engages the saw and forms a backing therefor.

When the back gage has been adjusted it is held in its adjusted position by a tightening screw d which looks the screw E against movement. v

The saw, it will be understood, is clamped between the inturned portions of the jaws more or less snugly to exert sufficient friction against the sides of the saw blade to always hold the same in any position in which it may be left after the action of the saw feeding means to be described that moves the saw verticallybetween its clamping members.

To set the teeth of the saw, I have devised a swage comprising a blade G of steel notched at its inner end to present two like beveled shoulders 14, the swage being pivotally mounted by a stud screw G on a swage carrier or yoke G forked to embrace the clamping jaws E, E employed to clamp the saw frictionally, said yoke being secured to the jaw E by bolts 16, and having a screw 15 which engages the aw E and acts to prevent said jaws from springing apart when the saw teeth are set. The end of the swage opposite its notched portion is united by screw 17 to an arm 18 shown by dotted lines, Fig. 4, and full lines Figs. 1 and 2, with which is connected by a set screw 27 an evener or equalizing device shown as a spring G the free ends of which contact with stops 20 of the yoke G The equalizing device G acts normally to maintain the swage in its inoperative position, as represented by Fig. 4, and to cause first one and then the other of the shoulders 14; to contact with one side of one tooth of the saw, and then with the other side of the next tooth, it is necessary to turn the swage first in one and then in an opposite direction, said swage while the saw is being moved to bring one tooth after another into position to be set, occupying its normal or central position, Fig. 4. This vibration of the swage about its stud screw G is effected by the actuators b, 6 carried by the file-carrying frame, one of said actuators meeting one side of the swage at one stroke of the file-carrying frame in one direction, the other actuator meeting the opposite side of the swage at the opposite stroke of the filecarrying frame, the saw-feeding device acting, as will be described, after the completion of each stroke of the file-carrying frame in each direction to thus place a new tooth of the saw in position to be acted upon at each stroke of the swage.

As the machine is herein represented as adjusted, it is supposed that the saw-setting feature of the machine is operative, and consequently the 'cam D is in its adjusted position toward the left, Fig. 1, thus bringing its part D in position to act on the roller D carried by a lever 0" pivoted at 0, said lever having mounted upon its inner or left hand end on a pivot c a pawl-carrier 0 the latter having a pawl 0 which forms part of the saw-feeding device. The pawl-carrier c is provided with an adjusting screw f having a check nut f, the adjustment of the screw permitting the point of the pawl to occupy one or another position, as may be required. The pawl has a stud f that is embraced by one end of a spring f the opposite end of the spring being connected in suitable manner with some fixed stud of the framework. The framework -is shown as having pivoted thereon by a screw f a block f provided with a fulcrum f over which the pawl 0 rocks in its movements, the rocking of said pawl over said fulcrum enabling the point of the pawl to approach and recede from the teeth in such manner as to engage properly the root of a tooth and to remain in contact with a tooth for any desired part of the length or stroke of the pawl.

The pawl is reciprocated at each stroke of the filecarrier in each direction so that the saw is moved to place its teeth in succession one to be acted upon at one side when the swage is moved in one direction, and the side of the next tooth being acted upon by the swage when moved in the opposite direction, the swage occupying its central or inoperative position Fig. 4 while the saw is being fed.

If the saw is to be filed only, then the cam D is shifted to the right, Fig. 1, so as to bring the portion containing the single throw point D in position to engage the roll D Vhen the cam occupies this position the saw will be fed one tooth during each rotation of the shaft A or during the outward and backward movement of the file-carrying frame. In order to prevent action by the swage, the latter with the yoke Gr may be removed or the actuators 5, Z) may be adjusted so that they will not engage the swage during the movement of the frame. In order to change the apparatus over from a filing and setting machine into a filing machine only involves, therefore, merely the shifting of the cam D.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a machine of the class described, a reciprocating frame, two opposed screws adjustably carried by the frame, saw-feeding means operating to feed a saw longitudinally between each of the strokes of the frame, and tooth-setting means including a pivoted swage situated between said screws and adapted to be engaged thereby.

2. In a machine of the class described, a file-carrying frame provided with a plurality of actuators, means to feed the saw longitudinally between each of the strokes of said frame in one and then in an opposite direction, tooth setting means including a swage moved in one direction by one and then in an opposite direction by the other of said actuators to thereby bend or set said teeth in opposite directions, and a resilient equalizing device to place the acting faces of the swage in their inoperative position while the saw is being fed.

In a machine of the class described, means to clamp and hold frictionally a saw blade, a yoke embracing the toothed edge of the clamped saw, a saw setting swage pivoted on said yoke and having two jaws and a yielding evener movable with said swage and coacting with said yoke and serving normally to retain the swage in position with its faces out of the path of movement of the saw as the latter is being fed through said clamping means.

4. In a machine of the class described, means to clamp and hold frictionally a saw blade, a yoke embracing the toothed edge of the clamped saw, a saw setting swage pivoted on said yoke and having two jaws and a yielding evener movable with said swage and coacting with said yoke and serving normally to retain the swage in position with its faces out of the path of movement of the saw as the latter is being fed through said clamping means, combined with devices to meet said swage and move the same positively in one and then in the other direction that one or the other of its faces may meet the right hand side of one tooth and then the left hand side of another tooth, the equalizer restoring the swage into its inoperative position between one and its next tooth setting stroke.

5. In a machine of the class described, a frame, a driving shaft, means for reciprocating the frame by rotation of the driving shaft, file-sustaining means carried by the frame, two adjustable projections also sustained by the frame, a swage pivoted between said projections and adapted to be actuated thereby as the frame reciprocates, means to hold a saw, a pivoted saw-feeding lever, and a cam on'the driving shaft for actuating said lever, said cam having a portion provided with a single throw point and another portion having two oppositelysituated throw points and being adjustable longitudinally of the shaft so that the portion having the single throw point or the portion having the two throw points may be situated to operate the lever.

6. In a machine of the class described, a driving shaft, a frame reciprocated thereby, means to secure a file to said frame, a swage adapted to be actuated by the frame, and saw-feeding means comprising a saw-feeding lever and a cam mounted on and adjustable longitudinally of the main shaft and having two portions either of which may be brought into position to actuate the lever, one portion having a single throw point and the other portion having two oppositely-situated throw points.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

LoUIs C. SMITH, MARGARET A. DUNN.

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