US551718A

US551718A - Harvey c

Info

Publication number: US551718A
Authority: US
Publication date: 1895-12-17
Anticipated expiration: 1912-12-17

Description

(110,1110de1.) H H. O. BURNETT.

IMPLBMENT FOR DRESSING SIDBS OF SAW TBBTH.

11055513118`t Patented Dan. 17, 1895.

W) w I 2117x7750 /ure ANDREW BGRMIAM.PHUTD-UTHOMSHINGTONJ,

UNITED SrAraEs HARVEY O. BURNETT, OF VVAUSAU,

VVISCONSIN, ASSIGNOR OF ONE-I-IALF TO HIRAM DUNFIELD, OF SAME PLACE.

SPECIFICATION forming' part of Letters Patent No. 551,718, dated December 17, 1895.

Application filed June 29, 1895.

To all whom it may concern:

Be it known that I, HARVEY C. BURNETT, a citizen of the United States, residing at Tausau, in the county of Marathon and State of VVisoonsin, have invented new and useful Improvements in Implements for Dre'ssing the Sides of Saw-Teeth, of which the following is a specification.

This invention has for its obj eot;l to provide a new and improved hand implement for dressing the sides of saW-teeth, to provide an implement of the Character referred to with novel means for guiding it in its movements on the saw-blade while dressing the sides of the saw-teeth, and to provide novel means for gripping and holding a steel or other file or similar dressing-tool at any requiredgangle of inolination relatively'to the base or support of the implement against which the saw-blade rests as the implement is reciprocated to dress the sides of the saw-teeth. f

To accomplish these objects `my invention consists essentially in the combination of a base-frame having a rest for the saw-blade, a file-supporting plate adj ustable to varying angles of inolination relatively to the baseframe and arranged at the inner or rear edge thereof, means for adjusting the -said file-supporting plate to the required angle of inolination,'a clamp-bar a'rranged opposite the filesupporting plate for olamping the file thereupon, and means for supporting and clamping the olamp-bar on a file placed upon the vfile-supportin g plate.

The invention also consists in the features of construction and the arrangement or oombination of parts hereinafter described 'and claimed, reference being made to the accompanying drawings, in which* Figure 1 is a perspective view of the improved implement for dressing the sides of saw-teeth. Fig. 2 is a transverse seotional view; and Fig. 3 is a longitudinal sectional view taken on the line 3 3, Fig. 2.

In order to enable those skilled in the art to make and use myinvention I will now describe the same in detail, referring to the drawings, wherein-fi The numeral 1 indicatesthe base-frame, which is preferably oomposed :of a fiat steel or other metal plate, having at its front edge 'serial No. 554,448. (No model.)

a laterally-proj ectin g saw-rest fiange 2. The steel or other plate 1 is rectangular in form, and the saw-rest fiange 2 is preferably formed integral with the plate; but obviously it can be made as a separate piece and riveted or otherwise secured thereto.

The numeral -1 indicates a secondary sawrest flange, which'is preferably oomposed of an angle-iron having one flange extending at right angles to the base frame or plate 1 and the other fiange secured to 4,the latter by rivets 5a or other suitable devices. The sawrest flange 4 is arranged at some distanoe from the flange 2, and the fianges are of equal height, so that it is possible to place the edges of the fianges against the surface of the saw, and then reciprocate the base frame or plate beside the saw-blade.

The inner or rear edge of the base frame or plate 1 is provided with a spring-support for supporting and holding a clamp-bar 5. The spring-support here illustrated comprises two bowed steel or other metal Springs 6 having one extremity secured to the under side of the base frame or plate 1, through the medium of rivets 7 o r other suitable devices. The other ends of the bowed springs overhangin g the inner or rear edge portion of the base frame or plate are secured to the rectilinea'rclamp-bar 5 by rivets 8 or other devices.

.The ,clamp-bar is oomposed of a narrow rectangular plate of metal having at its front edge a laterally-extending fiange 9, the front surface 10 of which is smooth and rectilinear and is adapted to rest against the points of the saw-teeth and glide thereuponwhen the implement is reciprooated on a saw-blade for dressing the sides of the saw-teeth, as will hereinafter appear.

The steel or other file or similar dressingtool 12 is arranged upon a file-supporting plate 13, oomposed of a flat reotangnlar piece of metal, having its rear edge provided with projeoting ears 14 having orifioes or perforations through which the screws 15 extend. The screws 15 are provided at one end'with heads 16, and at the opposite ends with screwthreads engaged by thumb-nuts 17, which are adapted to bear against the upper parts or portions of the bowed metal Springs 6, so that ICO when the th umb-nuts are tightened the bowed springs are compressed and the file or other dressing-tool 12 is elamped or gripped between the file-supporting plate 13 and the clamp-bar. Then the file or dressing-tool is elamped or gripped in the manner stated, the front edge portion 18 thereof Projects some distance in front of the guide-surface 10 of the clamp-bar 5, and the sides of the saw-teeth are adapted to lie upon the projecting portion 18 of the file or other dressingtool for the purpose of dressing the sides of the saw-teeth when the implement is reciprocated along the saw-blade.

The reciproeatingmotion of the implement is readily effeeted through the medium of a handle 10, seeured to the back of the base frame or plate 1, and adapted to be grasped by the hand of the operator.

The file-supporting-plate 13 is suseeptible of being adjusted to Varying angles of inclination relatively to the surface of the base frame 01' plate 1, and to accomplish this I provide two sets of adjusting-

screws

20 and 21. I preferably employ four of the sorews 20 and two of the screw 21, but the number can be increased or ,diminished as circumstances may justify. The adj usting-

screws

20 and 21 are engaged with screw-threaded oriices in the base fralne or plate 1, and the screws 20 are arranged in one line, while the screws 21 are arranged in another line slightly in ad- Vance or in front of the serews 20, so that if the serews 20 be screwed inwardly and the screws 21 be serewed outwardly the inner or rear edge of the file-supporting plate 13 will be raised, and the front edge thereof will be lowered, and eonversely if the serews 21 be screwed inwardly and the screws 20 be screwed outwardly the front edge of the filesupporting plate 13 will be raised, and the inner or rear edge will bc lowered.

By the simple means described the angle of inclination of the file-supporting plate 13 can be quiekly changed to suit the conditions required, according to the bevel to which it is desired to dress the saw-teeth. The angular adj ustment of the file-supporting plate 1.3 is rendered possible by reason of the fiexible Character of the yielding support composed of the bowed metal Springs G, and at the same time the bowed Springs peri'nit the file or drcssing-tool 12 to be rigidly elamped or gripped between the clamp-bar 5 and the filesupporting plate 13.

The file-supporting plate 13 is retained in proper relation to the base frame or plate 1 by reason of the ears 14 being loosely engaged with the screws 15.

In the practical use of the improved implement, it is placed upon the side of a sawblade, so that the edges of the saw-rest fianges 2 and -1 squarely support the implem ent, and the sides of the saw-teeth rest upon the projeeting portion 18 of the file or other dressing-tool 12, while the points of the teeth may or may notbear directly against the guidesurface 10 of the clamp-bar 5. The implement is then reciproeated by the hand of the operator grasping the handle 19.

The file-supporting plate 13 can be accurately and rapidly adjusted as occasion may require by simply adjustin g the

screws

20 and 21, as hereinbefore explained.

The file or other dressing-tool 12 can be quickly removed by simply loosening the thumb-nuts 17, and can be readily clamped and gripped in position between the clampbar 5 and the file-supporting plate 13 by simply tightening the nuts 17, as will be obvious.

The improved implement is simple and economical in construction; it is convenient in practicable use; it will accurately dress the sides of all the saW-teeth to a uniform and exact degree, and Will be found very advantageous and elieient for the purpose in hand.

llaving thus described my invention, what I claim is* 1. The combination of a base-frame, having a lateral rest to bear against a saw-blade, a spring yielding support securcd to the basefranie, andhaving a clampin g bar ov'crhanging the base-frame, a file supporting plate located between the base-frame and the clamping bar of the spring yielding support, and adjustable to Varying angles of inclination relatively to the base-frame between the latter and said elamping bar, said clamping bar and file-supporting plate being adapted to receive a file between them, means for supporting the file-supporting plate from the baseframe and adj listing said file-supporting plate to Varying angles of inclination, and devices for moving the clamping bar of the spring yielding support toward the file-supporting plate and base frame for clamping the file between the clamping bar and the file-supporting plate, substantially as described.

2. The combination of a base frame, haviu g a lateral rest to bear against a saw blade, a spring yielding support securcd to the baseframe and having a elamping bar overhanging the base-frame and provided with a longitudinal flange at one edge which forms a guide to bear against the points of the saw teeth, a file supporting plate located between the base frame and the clamping bar of the spring yielding support, adjusting screws passin g through the base frame and projccting from the rear thereof for the purpose of supporting and adjusting the file supporting plate to different angles of inclination, and screws and thumb-nuts acting upon the spring yielding support for clampin g the file between the said claniping bar and the said file supporting plate, substantially as described.

3. The combination of a base-frame having a rest to bear against a saw-blade, a file-supporting 'plate adjustable to Varying angles of inclination relatively to the base frame, two sets of adj usting screws for adjusting the filesupporting plate to the required angle of inclination, a spring-yieldin g support carried by the base-frame and provided with a elamp-bar IOO IIO

` supporting plate arranged at the inner or rearV for elamping a file or other dressing tool upon the file supporting -plate, and soreWs and thuinb-nuts aoting upon the spring-yielding support for clalnping the elanip-bar on the file or other dressing tool, substantially as deseribed.

4. The combination of a base-frame, a filesupporting plate arranged at the inner or rear edge of the base-frame and adj ustable to varying angles of linelination, adj usti'n g soreWs for adj Listing the file-supporting plate to the required angle of inclnaton, bowed metal springs seoured at one end to the base-frame and provided at the opposite end with a clampbar for olarnping a file or other dressing tool upon the file-supporting plate7 and sereWs and thumb-nuts for aeting npon the bowed Springs to olarnp the elamp-bar against the file or other dressingtool, substantially as descrbed.

5. The combination of a base-frame, a fileedge of the base-frame and adj ustalole to varyng angles of inelination, two sets of adjusting serews engaging the base-frame and bearing against the file-supporting plate for adjusting the latter to the required angle of inelination, bowed springs seoured to the baseframe and earrying a elainp -bar having a reotilinear guide surface for the points of sawteeth, and serews and thumb-nuts for aotng on the bowed Springs to clamp the clainp-bar on the file or other dressing tool, substantially as desoribed.

6. The combination of a base-frame, a filesupporting plate adj ustable to varying angles of nolination and having projecting ears, adjusting serews for adjusting the file-supporting plate to the required angle of inclination, a spring-yielding support seeured to the baseframe and oarrying a olanip-bar for elamping a file or other dressing tool upon the file-supporting plate, sorews carried by the yielding support and engaging the ears of the file-supporting plate, and thumb-nuts for compressing the spring-yielding support and olaniping the olanlp-bar against the file or other dressing tool, substantially as desoribed.

In testimony whereof I have hereunto set my hand in pres'enoe of two subsoribing witnesses.

HARVEY C. BURNETT.

Witnesses z W. G. Dnvon, JOHN CAWLEY.