US542548A

US542548A - Saw-sharpening machine

Info

Publication number: US542548A
Authority: US
Publication date: 1895-07-09
Anticipated expiration: 1912-07-09

Description

(No Model.) 3 Sheets-Sheet 1.

R..BARKER. SAW SHARPBNING MACHINE.

No. 542,548. Patented July 9, 1895.

z x F a/ l n ruu e ,e m. "www e ,E bf); 6 .6 i i Il (No Model.) 3 Sheei'Qs-Sheet 2.

R. F. BARKER.

SAW SHARPENING MAGHINB. No. 542,548. Patented July 9, 1895.

Witnesses:

Attorney y (No Mdel.) s sheetssheet a R. P. BAKKER.

SAW SHARPBNING MACHINE. No. 542,548.4 Patented July 9, 1895.

Inventor.

Attorney?,

UNITED STATEs ATENT OFFICE.

RUBEN F. BARKER, OF MARINETTE, WISCONSIN.

SAW-SHARPENING MACHINE.

sPEcIFIcArrON forming part of Letters Patent No. 542,548, dated July e, 1895.

v.Application led February 4, 1895. Serial No. 537 ,292. (No model.)

nette, in the county of Marinette and State of Wisconsin, have invented certain new and useful Improvements in Saw-Sharpening Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements for sharpening saw-teeth, and more especially the teeth of band-saws; and `the said invention consists of the certain novel combinations, constructions, and arrangements of parts, hereinafter described and claimed.

Reference is had to the accompanying drawings, in which the same parts are indicated by the same letters throughout the several views.

Figure 1 represents a side elevation of my improved saw-sharpening machine in operation on aband-saw. l Fig. 2 represents an end view of the said machine, partly in section, along the line xof Fig. 3 and looking to the left in the said figure. Fig. 3 represents a plan View of the' machine shown in Figs. l and 2. Fig. 4. represents an enlarged sectional View of one of the teeth of a band-saw after it has been swaged down before being sharpened, and Fig. 5 represents a view of the same tooth after it has been sharpened by my improved machine.

The devices shown in Figs. 4. and 5 are somewhat exaggerated, but represent the operation of my improved machine.

In the drawings, Arepresents the saw-blade provided with teeth a, which teeth are ordinarily swaged down, forming shoulders a', which shoulders are ground away, as at a2, by my machine, leaving angular cutting-edges, as shown most clearly in Figs. 2 and 5.

B, O, and D represent three pairs of guiderollers between which the saw-blade passes andby which itis held Iirmly in position. These guide-rollers are mounted in a frame E `and rotate in adjustable bearings e', held in the sliding blocks e, which are adjusted by means of the screws e2, and thus the pairs of rollers may be made to bear irmly against a saw-blade of any thickness. The lower ends of these rollers are mounted in the strip F.2 and are adjusted by means of the screws e3 which bear on the sleeves e4, as shown most clearly in Fig. 2.

lAbove the rollers C, which hold the sawblade rigidly between them, emery-wheels F are provided, with axes parallel to the sawblade', which wheels are adjusted by means of the hand-wheel F3 and sliding block F2 to bear upon the base of the sawtooth, as shown by the dotted lines in Fig. 5. This block F2 is dovetailed beneath the guide e5, as shown most clearly in Fig. l. Instead of the handwheel F3, adj usting-screws F4, as shown in Fig. 3, may be provided, if desired. Each of these emery-wheels F is mounted on the same shaft with the pulley F,`Which is driven by the belt G, passing over the pulley I-I on the driving-shaftH, which shaft is driven by means o f the pulley H0 or by any other suitable mechanism. Another pulley H2 is mounted on the driving-shaft, which is connected by means of the belt K with the pulley M, which pulley M drives the beveled pinion M', meshing in the beveled gear D', which is fast to the lower end of one of the rollers D, which roller. carries the gear-wheel D2, meshing in the gear-Wheel DB on the other roller of the pair. Thus, by means of the belt K and 'the gearing j ust described, the rollers D are caused to push the saw-blade ahead, feeding the same to the einery-wheels F, which sharpen the teeth seratm.

In order to adjust the saw-blade to the proper height relative to the emery-Wheels F, a block P is provided, which is moved vertically by means of the screw Q and handwheel Q', as shown in Fig. l. The operation of the device is as follows: The saw-blade is inserted between the rollers B, C, and D, and the'said rollers are adj usted ICO saw-teeth are sharpened mechanically while the saw is also fed forward mechanically, which is a greatsaving of time and manual labor. Again, the saw-teeth being hollowground present a sharp cutting-edge, which is better adapted to wear down sharp than the filed edges ordinarily found in saws which have been sharpened by hand. These and the various other advantages of the herein described construction will readily suggest themselves to any one skilled in the art.

It will be obvious that various modifications of the herein-described apparatus might be made which could be used without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. In a machine for sharpening saw teeth, the combination with an upright frame and vertical guide rollers horizontally adjustable therein and adapted to hold the saw blade between each pair; of a pair of abrading wheels arranged one on either side of the saw blade, with their axes parallel with the longitudinal axis of the saw blade, and adapted to cut into the sides of the saw teeth near the base thereof; means for advancing and retiring said abrading wheels, and means for rotating said abrading wheels simultaneously, and means also forrotatin g one pair of said guide rollers, substantially as described.

2. In a machine for sharpening saw teeth, the combination with an upright frame, a pair of vertical feed rollers mounted therein near one end thereof adjustable horizontally, and adapted to cause the saw blade to move past the abrading wheels; pairs of vertical guide rollers, also mounted in said frame and adjustable horizontally, each pair being adapted to hold and guide the saw blade; of a pair of abradin g Wheels arranged one on either side of the saw blade with their axes parallel with the longitudinal axis of the saw blade and being adapted to cut into the sides of the saw teeth near the base thereof on both sides simultaneously; means for advancing and retiring said abrading wheels, and means for rotating said abrading wheels and said pair of feed rollers at a different speed, substantially as described.

3. In a machine for sharpening saw teeth, the combination with an upright frame, a pair of vertical feed rollers mounted therein near one end thereof, adjustable horizontally and adapted to cause the saw blade to move past the abrading wheels; pairs of vertical guide rollers also mounted in said frame and adj ustable horizontally, each pair being adapted to hold and guide the saw blade; of a pair of abrading wheels each mounted upon a shaft journaled in a sliding block on either side of said saw blade, having their axes parallel with the longitudinal axis of the saw blade, and being adapted to cut into the sides of the saw teeth near the base thereof on both sides simultaneously; a hand wheel and screw mounted on either side of said frame for acl- Vancing and retiring said abrading wheels, and means for rotating said abrading wheels and said pair of feed rollers, substantially as described.

4. In a machine for sharpening saw teeth, the combination with an upright frame, a pair of vertical feed rollers mounted in said frame near one end thereof and adjustable horizontally; a bevel gear on the lower end of one of said rollers meshing with a bevel pinion mounted upon a shaft journaled in the lower part of said frame; a pulley on said shaft, means for driving said pulley; gearing between said feed rollers at their lower ends; the said rollers being adapted to cause the saw blade to move past the abrading wheels when adjusted upon -the saw and rotated; pairs of vertical guide rollers, also mounted in said frame and adjustable horizontally, and adapted to hold and guide the saw blade; of a pair of abrading wheels arranged one on either side of the saw blade with their axes parallelwith the longitudinal axis of the saw blade and being adapted to cut into the sides of the saw teeth near the base thereof on both sides simultaneously; and means for advancing and retiring said abrading wheels, substantially as described.

5. In amachine for sharpening saw teeth, the combination with an upright frame, a pair of vertical feed rollers mounted therein near one end thereof and adjustable horizontally; a bevel gear on the lower end of one of said rollers meshing with a bevel pinion mounted upon a shaft journaled in the lower part of said frame; a pulley on said shaft, means for driving said pulley; gearing between said feed rollers at their lower ends, the said rollers being adapted to cause the saw blade to move past the abrading wheels when adjustedupon 'the saw and rotated; pairs of vertical guide rollers also mounted in said frame'and adjustable horizontally, and adapted to hold and guide the saw blade; of a pair of abrading wheels each mounted upon a shaft journaled in a sliding block on either side of said saw blade, having their axes parallel with the longitudinal axis of the saw blade, and being adapted to cut into the sides of the saw teeth near the base thereof on both sides simultaneously; a hand wheel and screw mounted on either side `of said frame for advancing and retiring said abrading wheels, and means for rotating said abrading wheels, substantially as described.

6. In a machine for sharpening saw teeth, the combination with an upright frame, a pair of vertical feed rollers mounted therein near one end thereof and adjustable horizontally; a bevel gear on the lower end of one of said rollers meshing with abevel pinion mounted upon 'a shaft journaled in the lower part of said frame; a pulley on said shaft, means for driving said pulley; gearing between said feed rollers at their lower ends for causing said rollers to rotate simultaneously but in opposite IOC IIO

directions; pairs of vertical guide rollers also mounted in said frame and adjustable horizontally; a hand wheel and screw carrying a vertically adjustable block, mounted in the lower part of said frame, and adapted to support the lower edge of the saw blade; a pairof abrading Wheels each mounted upon a shaft journaled in a sliding block on either side of said saw blade, having their axes parallel with the longitudinal axis of the saw blade, and being adapted to cut into the sides of the saw teeth near the base thereof on either side of the saw blade; a hand Wheel RUBEN F. BAKKER. Witnesses:

E. C. EASTMAN, CHAs. H. DAVIS.