US433866A

US433866A - knecht

Info

Publication number: US433866A
Authority: US
Publication date: 1890-08-05
Anticipated expiration: 1907-08-05

Description

(No Model.) 2 Sheets-Sheet 1v J. & H. KNEOHT. MACHINE FOR SHARPENING SAWS.

No. 433,866. Patented Aug.5, 1890.

W'Ltn 6556.5. [53 I III 67 1 3 2 Sheets-Sheet 2.

(N0 Modl.) J. 8: H. KNECHT.

MACHINE FOR SHARPENING SAWS.

No. 433,866. Patented Aug. 5, 1890.

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(Z, v l MAMA/LA KM" K JM 4W mus versus 20., mm-D-umm, msnmeron n c UNITED STATES PATENT OEEIcE.

JACOB KNECI-II AND HEINRICH KNECHT, OF ZURICH, SWITZERLAND.

MACHINE FOR SHARPENING SAWS.

SPECIFICATION forming part of Letters Patent No. 433,866, dated August 5, 1890. v Application filed February 8, 1890- Serial No. 339,730. (No model.) Patented in Switzerland May 29, 1889, No. 1,( )72.

To all whom it may concern:

Be it known that we, JACOB KNECHT and HEINRICH KNECHT, citizens of Switzerland, residing at Zurich,in the canton of Zurich and Republic of Switzerland, have invented certain new and useful Improvements in Machines for Sharpening the Teeth of Endless Saws, and Frame and Circular Saws, (for which we have obtained Letters Patent in Switzerland, No. 1,072, dated May 29, 1889;) and we 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, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention pertains to a certain new and improved saw-sharpening machine; and it comprises the detail, construction, combination, and arrangement of parts, substantially as hereinafter fully set forth, and particularly pointed out in the claims. The sharpening goes on with the greatest correctness, the saw sets in by itself by means of a simple pressure upon a lever, and the pitch as Well as the height of the teeth of very old saws may be restored. The machine Works with great ease and is very easy to attend to.

The annexed drawings represent, in Figure 1 a front view; Fig. 2, an end view of the said machine; Figs. 3 and 3, some parts of the clamping arrangement; Figs. 4 and 4, the clamping apparatus for the endless saws; Figs. 5 and 5, the same apparatus for circular-saws.

To the upper end of a standard y is secured an arm a, to which a plate cl is connected. Upon this latter plate (1 is a second plate (1, movably fixed by means of screws 01 which also su ort a uidin -frame d wherein moves a slide (1 capable of being moved up by a screw-spindle (Z having a hand-wheel d". Two collars Z Z of the slide cl" form bearings forashaft Z which on one end is provided with a grooved pulley Z and on the other a grinding or sharpening wheel Z.

On the standard there is a plate 6, upon which another plate e, connected with aheadstock a, is fixed by the screws 6 To this head stock a is secured (or formed therewith) a guiding-frame 6 upon which a slide e Is attached in such a manner that It may be moved to and fro by means of a joint-lever v 2. The set-screws h and h limit the movement of the slide a in opposite direction. To the slide a is secured a rotary guidingframe 6, fixed thereon by the screws c and c In this frame e is disposed a slide capable of being moved down and upward by a lever 1 and bar 6 The set-screws h and 71 are also here intended to limit the stroke of the slide.

Upon the slide 6 a plate 70 is pivoted at k and is fixed thereon by means of the screw 70*. The upper edge of this plate 70, supporting the different frames into which the saw-blades are put, must be brought into a horizontal position before the machine is operated. At the upper end of the plate 70 slides a knee 0. The joint-lever 3 effects, when pressed down, a movement of this knee 0 from the right to the left, and the springfdraws back the knee 0 and the lever 3 into the first position when loosened.

In the upper end of the knee 0, provided with a slit, a slide-rest o is arranged movable to the right and the left. A catch 0 with a setscrew 0 is fixed upon this slide-rest 0 The slide d" supports an adjustable fence' d against which runs the screw 0, screwed in the bearer 0 The saw-blade is pressed into the frame o by means of a knee ki'beari-ng a fiat spring. A bar 0" is fitted to join the frame r with the plate is.

Two screw-clamps o and v joined together by a bar r and movable upon the bar 7 are intended to fix the saw-blade s. The bar T has two angles r and r laid over the upper edge of the saw-blade. Thebasis g supports the different frames mentioned above.

For holding fast an endless-saw blade We apply a wooden two-part frame u,-Figs. 4 and 4, in which the said blade can slide. Bythe screw it the saw-blade can be put into its correct height. The hinge-joints a and a allow knee 'w, movable in the horizontal direction, the longest leg of which is provided with a groove. The screw-bolt 10 put into this groove, forms the center of the blade. The grinding-wheel Z receives its rotary movement from the communicator b and the grooved pulleys b and Z Before the machine is to be started the following operations must be proceeded with: The saw-blade to be sharpened is fixed upon the frame r by means of the screw-clampso and Q72, whereby the angles 0 and r of the bar r lie upon the teeth of the blade. Then must be adjusted, first, the guiding-frame (2 with its slide a in such a manner that the center of the latter forms a parallel to the back of the tooth, the lifting of the slidec being limited by the set-screws h and 71,2, second, the guiding-frame c with its slide 6 in such a manner that the center of the latter forms a parallel to the face of the tooth with the set-screws 7L3 and h. After having given the desired position to the grindingwheel Z, we make the distance between the adjustable fence d and the screw 0 level to the pitch of the teeth, and the machine is ready for use. For working the face (cutting part) of the toot-h the lever 1, with the bar 6 is lifted, whereby the slide c is moved upward till this movement is stopped by the lower set-screw. During this operation the Whole frame is lifted parallel to the face of the teeth, and simultaneously one tooth is prepared by the grinding-wheel. An oppositedirection of the lever 1 rcconducts the slide a into its original position, also limited by a set-screw. To the working of the back of the tooth the lever 2 is moved, acting on the slide e in a similar manner as it has been described above. The lever 3 when pressed down moves the bar r with the saw-blade s to the left by means of the parts 0 0 0 till the screw 0 runs against the adjustable fence cl". The spring f draws back the parts .9 r 0 0 0 as soon as the lever 3 is released, and the proceedingis repeated. The blades of the endless and circular saws are worked in a similar manner as we have described above.

WVe claim- 1. In a saw-sharpening machine, the combination, with the saw-support, of a stationary frame 6 an adjustable slide 6 located in said frame, and a lever connected to said slide for operating the same, substantially as set forth.

2. In a saw-sharpening machine, the combination, with the saw-support, of a-stationary frame 6?, an adjustable slide 6, located in said frame, set-screws h kg, for. limiting the movement of said slide, and a lever connected to said slide, substantially as set forth.

3. In a saw-sharpening machine, the combination, with the saw-support, of a stationary frame 6 an adj ust-able slide 6 located in said frame, and the lever for operating said slide, substantially as set forth.

at. In a saw-sharpening machine, the combination, with the saw-support, of the stationary frame a, the slide 6 the frame 6 the slide 0 the connection between said frame 6 and slide 6 and the operating-levers, substantially as set forth.

5. In a saW-shar enin machine the com bination,with the saw-support, of the adj ustable spring-h eld knee 0, having a catch 0 substantially as set forth.

6. In a saw-sharpening machine, the combination, with the saw-support, of the adj ustable knee 0, the spring secured to one end thereof, the bearer 0 secured to said knee, and the catch 0 connected to said bearer, substantially as set forth.

7. In a saw-sharpening machine, the combination, with the saw-support, of the adjustable knee 0, the spring secured thereto, the bearer 0 the catch 0 connected to said bearer, the set-screw 0, and the depending adjustable fence d substantially as set forth.

8. In a saw-sharpening machine, the combination, with the saw-support, of the bar r and the clamps *0 c secured to the ends thereof, substantially as set forth.

9. In a saw-sharpening machine, the frame it, having a hinged front portion, and a setscrew it, for adjusting the height of the sawblade, substantially as set forth.

In testimony whereof we aiiix our signatures in presence of two witnesses.

JACOB KNEOHT. HEINRICH KNEOH'I Witnesses:

H. LABHART, PAULINA GRACHY.