US482606A - Peter woodking - Google Patents

Description

(No Model.)

P. WOODRING.

BUCK SAW.

No. 482,606. Patented Sept. 13, 1892.

INVENTOH WITNESSES A T TORNE Y S.

I UNTTED STATES PATENT OEErcE.

PETER \VOODRIN G, OF KANSAS CITY, MISSOURI, ASSIGNOR TO HIMSELF AND JAMES M. GROSS, OF SAME PLACE.

BUCKSAW.

SPECIFICATION forming part of Letters Patent No. 482,606, dated September 13, 1892. Application filed January 25, 1890. Renewed March 3, 1892. Serial No. 424,165. (No model.)

To aZZ whom it may concern:

Be it known that I, PETER WooDRINe, of Kansas City, in the county of Jackson and State of Missouri, have invented a new and useful Improvement in Bucksaws, of which the following is a full, clear, and exact description.

This invention more immediately relates to the frames of bucksaws in which braces crossro ing each other diagonally between the handle and bow or forward end of the saw are used in connection with the adjustable stretcher at. the upper part of the frame andsaw-blade at the lower end thereof. These diagonal braces have mainly been used to stiffen and support the frame or end bars thereof, and by their loose, slotted, or pivoted fit where they cross each other to provide for straining or relaxing the saw by the adjustable stretcher.

My invention consists in a novel construc tion and combination of parts in a bucksawframe of this description, substantially as hereinafter described,and pointed out in the claims, whereby, while every facility is af forded for adjustment, a more rigid support is given to the frame and the same is prevented from getting out of shape or becoming racked, strain is largely removed from the stretcher while using the saw, and the saw is effectually held at its strain or stretch.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a side view of a buck saw embodying my invention; Fig. 2, a longitudinal section of the same mainly upon the line to L6 in Fig. 1, and Fig. 3 a view in perspective of the diagonal braces in part with clamping'thumb-screw in section.

A and A indicate the usual side or end pieces of the frame,A being the handlepiece and A the bow or front piece. 13 is the sawblade, secured at its opposite ends to said side or end pieces A A in the usual or any suitable manner.

C is the adjustable screw-threaded stretcher connecting the upper ends of the pieces A A for putting tension on or straining the sawblade. This stretcher may be of the ordinary or any approved construction.

D D are the diagonal braces arranged to cross each other in the center of the length of the bucksaw and having a tenon fit at their ends in the back and front pieces A A. These diagonal cross-braces are cut away or reduced one-half of their thickness in their middle on adjacent sides where they cross each other, such reductions b I) being somewhat greater in length than is necessary to receive the crossing brace within them. Furthermore, said braces D D have longitudinal slots 0 0 made in their crossing central portions for the purpose of receving a clamping set or thumb screw-bolt S through them, and also, preferably, but not necessarily, through plates G G, riveted one to each brace D upon the sides of the braces which have the reductions 1) in them. These plates are also each provided with a slot c, parallel with the length of the brace, to which the plate is secured and crossing the slot 0 in the adjacent brace. The shank of the clamping screw-bolt S passes through these several slots 0 c and e e, and is made square or angular where itprojects through the one slot 0 and adjacent slot 6 to engage therewith, but round or loose where it passes through the other slots 0 and c, to prevent said bolt from turning when tightening up or slackening it by the turning of the thumb-nutf upon the one end of said bolt. The plates Gr G serve as covers to the reductions 1) b to keep the interlocking braces D D in place where they cross each other, and constitute a useful adjunct to the clampingbolt S, as well as to strengthen the braces, and do not materially add to the thickness of the combined braces, each of which being cut away half of its thickness where the two braces interlock with and cross each other lies in one and the same plane. The plates G G in a measure constitute washers for the clamping-bolt, and ordinary washers might be substitutedforthem. Theclampingscrew-bolt S is not a mere pivot or pin passing through the crossing braces D D, but constitutes a fastening or adjustable tightening-up de vice for holding said braces together when or after tension has been put upon the sawlolade B by the stretcher O, and serves to relieve said stretcher, to a great extent at least, of strain when the saw is in use. My improvement accordingly gives a direct tension to the saw with no reaction on the stretcher. The braces where they are mortised in the end pieces can be placed at only such a distance from the saw proper as to give great strength and a good lever-power to the tension. The braces will not spring outward and the whole frame will keep its shape, and the frame will be less liable to fall apart when the saw-blade is removed. A wide spread is obtained at the saw end by a limited. number of turns of the stretcher, and the frame will never spring enough to cause the stretcher to be shortened. When the clamping-bolt S is loosened, said bolt can be slid or the braces be moved in a proper direction for adjustment without binding or friction, and when the thumb or clamping screw is set the diagonal braces cannot get out of shape or spring apart or bend out either way, the connection then virtually being a rigid one at the point of intersection of the braces. The set or clamping screw is accordingly a vital part of the invention, as by means of it the frame can never get out of shape or rack. Were it not for this rigid central connection as obtained by the set-screw, the tension or strain upon the diagonal braces would bend them outward and in time would throw the frame out of shape, and the slotted plates or Washers on the outside of the braces also tend to make said screw form an effective clamp-fastening and to give great strength and rigidity to the frame after a proper tension is secured. As hereinbefore observed, also, the set or clamping screw when screwed down serves to remove the strain from the stretcher when the saw is in use and causes the frame to take the strain upon itself to a Very great extent by the binding of the diagonal bars together. Thus when the diagonal bars are thus clamped the stretcher mightbe removed and the saw would still retain its tension, and the clamp being an adjustable one every facility is afforded for adjusting the frame to alterations in the tension by the stretcher and for taking out the saw-blade without the falling apart of the frame.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a bucksaw, the combination, with the frame composed of the side or end pieces A A and the centrally interlapping and crossing diagonal braces D D, having slots c c, of a clamping set-screw passing through said slots and adj ustablefrom'the exterior of the braces for operation in connection with an adjustable stretcher and the saw-blade, substantially as specified.

2. In a bucksaw, the combination of the plates G G, having slots 6 e in them, the di agonal crossing-braces D D, having central reductions b b in their adjacent surfaces and slots 0 c, the clamping set-screw S, the end f rame-piecesAA and the adjustable stretcher C, for operation in relation with each other and with the saw-blade, essentially as set forth.

PETER VVOODRING.

Witnesses:

L. T. BROWN, F. P. LYMAN.

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