US1840925A - Saw - Google Patents

Description

E. R.` WELCH SAW Filed July 2, 1951 ERI/@Z071 Mouw@ Patented Jan. 12, 1932 ELMER R. WELCH, OF ".VICHITA, KANSAS SAW Application filed July 2, 1931. Serial No. 548,415.

This invention relates to improvements in saws, and pertains particularly to saws of the type wherein the blades are removable.

The primary object of the present inven- 5 tion is to provide a saw having a removable blade and means whereby the blade may be tightened or placed under tension so as to be effectively held against movement while in use.

Another object of the invention is to provide a saw having a removable blade and me'ansfor tensioning the same, in which the said tensioning means is easily accessible and maybe easily manipulated for effecting the tightening up or the release of the saw blade when the same is to be removed for changing or after it has been placed in position.

A still further object of the invention is to provide a novel means for mounting the blade tensioning means upon the handle of the saw.

The invention will be best understood from a consideration of the following detailed de scription taken in connection with the accompanying drawings forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawings but may be changed or modilied so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings: Figure 1 is a view in side elevation of a Y saw constructed in accordance with the present invention, the cent-ral portion thereof being broken away.

Figure 2 is a sectional View taken upon the 4 line 2-2 of Figure 1.

Figure 3 is a sectional view taken upon the line 3 3 of Figure 1.

Referring now more particularly to the drawings, the numeral 1 indicates generally the bach of the present saw structure while the handle thereof is indicated generally'by the numeral 2. As shown, the back comprises an elongated bar 3 having angularly directed front and rear portions 4 and 5 respectively, forming integral continuations of the ends thereof. The handle 2 comprises a hand grip portion 6 and a stock portion 7, the front edge of which is slotted to receive a portion of the rear part 5 of the back, as shown in Figures 1 and 3, and this portion of the bach is secured in place in the stock by transverse screw members 8 of the usual type used in saws.

The bach structure 1 and the handle 2 are both of cast metal of a suitable character and thus the union between the bacl-I and handle may be made of a much more rigid and permanent character than if the handle were made of wood, as is usual in saws of this type.

frs shown, the lower part of the hand grip G is extended beyond the lower edge of the stock portion 7 and formed to provide the ear 9, the end of which is substantially in alignment 'ith the ends of the portions 4 and 5 of the bach. The forward face of this ear 9 h: ixed therein one end of a threaded stud 10 which extends forwardly and which isfthreadably engaged in one end of a turn buckle sleeve 11. ln the other end of this sleeve- 11 tlcre is thrcadably engaged the 7 end of a stud 12. the other end of which is joined to one end of an elongated member 13 to which one end of the saw blade 14 is connected when it is in place in the saw back frame. T his member 13, which may be termed a blade holder, is bifurcated at thc end opposite the stud 12, as indicated at 15, to receive the end of the rear terminal portion 5 of the bach frame 1. ,In addition to this. this body is provided with a transverse notch or groove 16 which passes through the inner end of the bifurcation 15, as is clearly shown in Figures 1 and 2.

Llach of the terminal portions 4; and 5 of the bach frame is provided with a slot 17 which extends longitudinally of the saw structure and which is formed to receive one end of the blade 1e and the forward edge of the portion l is notched, as at 18, for the reception of the transverse pin 19 which is 9" carried by blades of the character here illustrat/ed. The rear end of the blade also has a transverse pin which is indicated by the numeral 2O and which engages at its ends in the transverse recess 16 of the body 13 when the b'lade is mounted in position in the saw back frame.

From the foregoing description it Will be readily understood that in mounting the blade 14 in the saw back frame, one end is positioned in the slot 17 in the forward portion l of the frame so as to engage the ends of the pin 19 in the notch 18 and the other end is located in the bifurcation in the body 1.3 with the ends of the pin 2O in the recess 16. This end of the blade will then position y in the slot formed in the portion 5 of the back and the portion 5 will in turn position in he bifurcation in the body 16, the forward portion of this bifurcation being made of sufficient width to take both the blade and he part 5 of the back, as illustrated in Figures 2 and 3. After locating the ends of the saw v in the manner described the turned buckle sleeve 11 is vthen rotated and as the studs 10 and 12, which form a part of the turn buckle assembly, are oppositely threaded lie turning of the sleeve in the proper direction-will cause ya drawing of the blade to a taut condition.

ln order to facilitate the turning of the sleeve 11 there is formed integral therewith a pair of ears 21.

Having thus described the invention, what is claimed is:

1. In a saw having a removable blade, a back portion comprising an elongated bar having angulai'ly directed terminal portions,

iihandle connected with one of said terminalY portions, means for facilitating the attachment of one end of a saw blade with the terminal portion remote from the handle, a. turn buckle assemblyv comprising a pair of oppositely threaded studs and a sleeve connecting the same, one of said studs being secured at one end to the handle, an elongated bifurcated body connected at one end with the end of the other stud and adapted to receive in the bifurcation the back terminal portion adjacent the handle and also the other end of the saw blade, and means for securing the said other end of the blade to the body.

2. A saw of the character described coniprising a back having an elongated body portion and laterally turned end portions, said end portions being flat and each having a slot therein extending parallel to the flat sides and longitudinally of the saw, one of said end portions having a transverse notch in its outer edge, a handle body having a stock portion secured to the back at the point of joinder between that end remote from the notched end and the body portion thereof and a hand grip formed integral with the stock, the under edge of the stock and hand grip being cut away to form aniear disposed beneath the hand grip' portion and in spaced relation to and in alignment with the adjacent end .of the back, a blade having a pair of pins trans- '5 versely therethrough and extending through the slots of the turned portions of the back,

one of said pins engaging in said notch at4 the forward end of the saw, the other of the pins being disposed between the other terminal portions of the back and said ear, a pair of threaded studs disposed in alignment between said ear and the adjacent terminal portion of the back, one thereof being permanently fixed in the ear, said studs being oppositely threaded, a sleeve connecting the studs, Vand an elongated bifurcated body formed integral at the end opposite the bifurcation with the other stud and having a transverse recess therein for the reception of the pin' at the said other end of the saw blade, said bifurcation being designed to receive the adj acent terminal end of the back to extend across the side faces thereof.

In testimony whereof 1 hereunto aliX my signature.

ELMER R. l/VELCH.

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