US401277A - Saw-jointer - Google Patents

Description

(No Model.)

W. A. HUNTER.

SAW JdINTER.

Patented Apr. 9, 1889.

MWE/VTOH WITNESSES:

ATTORNEY UNITED STATES PATENT FFICE.

SAW-JOINTER.

SPECIFICATION forming part of Letters Patent No. 401,277, dated April 9, 1889.

Application filed October 5, 1888. Serial No. 287,316. (No model.)

To all whom it Hwy concern.-

Be it known that I, \VESLEY A. HUNTER, a citizen of the United States of America, residing at Idaho Springs, in the county of Clear Creek and State of Colorado, have invented certain new and useful Improvements in Saw- Jointers, of which the following is a specification, reference bein ghad therein to the accompanying drawings.

My invention relates to an improved construction and arrangement of a device termed a saw-jointerthat is, a device for bringing the cutting ends of the teeth of a saw into the same line or plane.

As is well known, it is often necessary and generally desirable in sharpening saws to joint them-that is, cut away any ends of teeth projecting beyond the general toothline, bringing the ends of all the eeth into one straight line, that each may ct equally upon the material to be cut. Sucliflointing, however, is, when done by hand, the file being held directly in the hands, a very delicate operation, requiring careful and steady manipulation and a good eye, so much so that considerable care, trouble, and time are involved. Some forms of jointers have been proposed for this purpose in which a file was securely held between fixed sides, adjustable gage or guide pi ces being supported between the fixed sides to guide the saw as it was reciprocated over the file. There is an objection, however, to reciprocating the saw over the file, as must be done in such type of j ointer, arising from the fact thatitis difiicult to reciprocate manually a body the length of an ordinary saw in a perfectly-straight line, there being a tendency to reciprocate the edge in a curved line, to obviate which great care, attention, and skill are necessary.

The object of my invention, therefore, is to provide a simple compact device adapted to be grasped in the hand and manually reciprocated over the edge of a saw firmly clamped and held stationary, by which it may be per fectly jointed without the need of any especial training or the exercise of any especial care or delicacy in manipulation, and by the use of which perfect alignment of the teeth ends may be secured automatically, so to speak-a device readily used, durable, and reliable; to whichends the invention consists in the features and arrangements more particularly hereinafter described and claimed.

In the drawings I have illustrated two embodiments of my invention, unitary in principle and general construction and differing only in minor details.

In the drawings, Figure 1 is a top or plan View of one form; Fig. 2, an end view'thereof; Fig. 3, a perspective view of another form; Fig. 4, a top or edge View, and Fig. 5 a face view of a detail of Fig. 3.

In the figures the reference-numerals 1 2 indicate the sidesor main frame-pieces of the jointer. They are secured together so as to be fixed relatively to each other and ata little distance apart by the connectors or clamps 3 3, each having a recess, 4, in its face next the side pieces, 1 2, in which recesses may be secured the file 5, so that its face lies over the space between the sides 1 2. Set or binding screws 6 6 take through the. connectors 3 3 and upon the file, so that the latter may be held firmly in position and yet be capable of ready detachment from or securement in its seat.

In the space between the sides 1 2 is secured a sliding intermediate gage block or piece, 7, against one side of which take the ends of adjusting-screws 9 9, seated in one of the main sides 1, so that when the jointer is placed upon the saw, with the inner face of the file lying upon the teeth thereof, the piece 7 may be moved up by the screws 9 9 to such distance as just permits easy movement of the blade betweenthe gage block or piece '7 and side 2, the upper parts of the faces of which are beveled or flared outwardly, as shown at 11, to give therea-t an increased space to accommodate the set of the saw.

These general features of construction are the same in both forms, and the description thus far given applies to both. It is necessary that the intermediate gage-piece, 7,

should be secured between the sides 1 2 and IOO In the other form the intermediate gage-piece, 7, has at its ends rearwardly-extending tongues or lugs 10 10, moving in corresponding recesses in the ends of the side piece 1, attaining the same results, the intermediate gage block or piece being secured in position in both forms by attached guide-rods.

In practice it is preferable that the recesses 4 be somewhat Wider than the files to be used, when the file may be moved to change the portion of its face lying over the space between side 2 and gage-piece 7 and to distribute the wear over its face.

In operation, the saw being fixed toothed edge up in any suitable vise or clamp by which it may be firmly held, the gage-piece 7 is retracted until the space between it and.

side 2 is sufficient to permit the jointer to be placed upon the saw. It is then moved for- Ward until the space is just sufficient to permit the jointer to be'moved along the sawblade without binding or undue friction thereon. The 3' ointer is then reciprocated along the edge, the file taking upon the teeth ends, and extending, as it does, over many teeth, bringing their ends into perfect alignment. At the same time, as the file is held rigid and at a right angle to the sides, and as they are maintained parallel to the blade, the filing is at a true right angle to the web of the blade. Thus perfect jointing is secured, and that without extraordinary skill or care.

Having thus described my invention, what I claim is 1. A saw-jointer adapted to be grasped in the hand and reciprocated over the edge of a IVESLEY A. HUNTER.

WVitnesses:

Z. F. WILBER, R. M. lVlCDERMOTT;

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