US534419A - Saw filing machine - Google Patents

Description

(No Model.) 2 Sheets-Shet 1.

RVBAUER. SAW FILING MAGHINE.

No. 534,419. I Patented Feb. 19, 1895.

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R. BAUER, SAW FILING MACHINE.

No. 534,419. Patented Pe. b."19, 18.95.

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RICHARD BAUER, OF. NEIV YORK, N. Y., ASSIGNOR TO PAUL PRYIBIL, OF SAME PLACE.

SAW-FILING MACHINE.

SPECIFICATION forming part of LettersPatent No. 534,419, dated February 19, 189 5.

Application filed June 28,1894. Serial No. 515,944. (No model.)

To all whom it may concern:

Be it known that I, RICHARD BAUER,of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Saw-Filing Machines, of which the following is a specification.

I will first describe my invention in detail with reference to the accompanying drawings and afterward point out its noveltyin claims.

Figure 1 is a plan view of a machine embodying my invention. Fig. 2 represents a vertical section in the line 2, 2 of Fig. 1. Fig. 3 is a view taken at that end of the machine which is to the left in Figs. 1 and 2. Fig. 4 represents a section of part of the saw feed mechanism in the line 4, 4, of Fig. 1. Fig.5 represents a detail View which will be hereinafter explained.

. Similar letters of reference designate corresponding parts in all the figures.

A is a base on which are erected standards B and O. The standard B comprises a journal box in which rotates a shaft S from which motion is imparted to all parts of I the machine. The standard 0 comprises a horizontal guide 0 which is arranged at right angles to the shaft S and in which works a reciprocating carriage D in which the file holder E is pivoted in such manner by pivots a as to be capable of swinging in a direction transverse to the direction of the reciprocating movement of said carriage, for the purpose of bringing down thefile eto the proper level for filing the saw and for raising the file to a suitable height to allow the saw to pass under it to be presented to it tooth by tooth. The said shaft S is represented as furnished at one end with fast and loose driving pulleys F F for a driving belt and Witha handcrank G to operate the machine by hand. At the other end the shaft has a crank disk H carrying a crank pin 11 and carrying also a cam I, the said crank .pin serving to give a reciprocating movement to the carriage D to produce the filing movement by means of a connecting rod J, and the cam I serving through a lever I"to operate the movable pulley F has affixed to one side of it a cam' L for operating the saw feeder as will be hereinafter explained.

The fixed member K of the clamp of the saw holder is cast with or rigidly affixed to the base A and has braces 10 k at the back which serve to support the fulcrum 11 of the lever I. The movable member K of the clamp is pivoted at its bottom by pivots k to brackets k on the base A, and is connected with the lever I by a bolt '1 the said bolt being engaged, as shown in Fig. 2, with the upwardly hooked front part of the said lever between two lateral projections z" t" on the said a bolt. The bolt 1 is screw-threaded at its outer end to receive a nut '5 by which said bolt'is adjusted to regulate the closing of the members of the clamp according to the thickness of the saw.

Between the two members K K of the clamp of the saw holder there is a support b to serve as a bearing for the back of the saw 0, the said support being prolonged on both sides of the members as shown in Fig. 3. The support I) is adjustable higher or lower according to the width'of the saw, so that it may bring the teeth to the proper height for filing, by means of a screw 1) which screws through a lug b on the base A.

The lever I is provided at its rear end under the cam with a pivoted toe 1 adjustable 8Q by a set screw 71 to regulate the movement produced by the cam I which is of such shape that it keeps the saw clamped by its action on the movable member K of the clamp during the forward or operative movement of the 8 5 file which is indicated by the arrow 6 in Fig.

2, the cam being inoperative during the backward movement of the file and leaving the movable clamp memberloose so that the saw merely rests upon the support 6 and is free to be moved lengthwise to present a new tooth in position for filing.

For the purpose of producing the necessary downward pressure upon the file to make it operate effectively, by the downward oscilla- 5 tion of the connecting rod J, a spring (1 is at-. tached to the under side of the said rod J by two screws d 01 the said spring bearing upon a projection e (see Fig. 2) on the holder. The pressure of this spring is made adjustable by too a set screw (1 screwing through the rod J. In order that the said spring may not press down the holder farther than is necessary an adj ustable stop screw e is screwed through the holder E to stop against the slide D.

For the purpose of raising the holder to lift the file clear of the teeth of the saw to allow the saw to pass clear of the file to presentitself tooth by tooth, there is a projection e on the holderwhich overlies the connecting rod J and through which is inserted a set screw e, the end of which is so situated over the connecting rod J that the said-rod duringits upward oscillation produced during its backward movement which takes place in the upper half of the revolution of the crank pin will be brought in contact with the said screw and will lift the holder.

The feeding of the saw is produced by two dogsfcarried by a pawl f which is pivoted to the arm L of a rocker L which is fitted to rock on afixed shaft 9 supported in bearings g g on the base A, the said dogs acting directly on the saw teeth like a pawl upon a ratchet. The rockerLis actuated by the cam L hereinbefore mentioned on the fast pulley F, but the said cam does not act directly upon this rocker but upon a loose arm h which is fitted to the shaft 9 and projects through an opening h in the rocker as shown in Fig. 4 and is adjusted to the rocker by means of a set screw 77/ and nut 71 to regulate the extent of the movement of the saw produced by the action of the cam upon the rocker.

The return movement of the feeding pawl f is produced by a spring 7L3 secured under the base A and pressing upward against a projection 7r which extends from the rocker L through an opening in the base. The backward movement of the feeding pawl is regulated by a set screw h adjustable by a nut h in a projection 717 on the rocker L, the end of the screw coming to a stop bystriking the base A. The loose arm h has also applied to it a spring 9 for the purpose of pressing it back toward the cam L, the said spring being coiled around the shaft 9 within the rocker and having one end connected with the arm h and the other with the shaft 9 as shown in Fi 5.

The particular machine which I have herein illustrated and described as an example of my invention is organized for the filing of straight saws but every feature of this machine except the saw holder is just as well adapted for the filing of circular saws, for which purpose a diiterent kind of saw holder will be necessary. It is not necessary to here represent this circular saw holder as it constitutes a part of the subject-matter of anotherapplications for Letters Patent filed concurrently herewith.

What I claim as my invention is- 1. The combination in a saw filing machine, of a saw holder, a reciprocating carriage and a guide therefor, a file holder pivoted to said carriage to swing in a direction transverse to the reciprocating movement thereof, a crank shaft and a connecting rod for producing the reciprocating movement of said carriage, and a springinterposed directly between said connecting rod and the file holder for the purpose of producing pressure upon the file by the oscillating movement of said rod; substantially as herein set forth.

2. The combination, in a saw filing machine, of a saw holder, a reciprocating carriage and a guide therefor, a crank-shaft and a connecting rod for producing the reciprocating movement of said carriage, and a file holder pivoted to said carriage to swing in a direction transverse to the reciprocating movement thereof and having a projection which overlies said connecting rod and upon which said rod acts by its oscillating movement to lift the said holder; substantially as herein set forth.

3. The combination with the saw holder, of the saw feeding mechanism herein described consisting of the rocker L having an arm L carrying a pawl f, the shaft 9 supporting said rocker, the spring 71 for throwing back said rocker, the loose cam-actuated arin h on said shaft g, the spring 9 for throwing back said cam-actuated arm and the adjusting screw h between said rocker and loose camactuated arm, substantially as herein described.

RIOHARD BAUER.

"Wi tness es FREDK. HAYNES, GEORGE BARRY.

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