US1121217A - Saw-guide. - Google Patents

Description

J. E. WILSON.

SAW GUIDE.

APPLICATION FILED APR.1.1914.

1,121,217. Patented Dec. 15 1914.

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III/A I h N gl'vwemto n r13 3 g? .1 E W! LSO N 17 (16%: w .m m- 4445 4 E STATES PATENT OFFTQ.

JOHN E. WILSON, 0F PEN ARGYL, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO' GEORGE W. GREEN, OF PEN ARGYL, PENNSYLVANIA.

SAW-GUIDE.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed April 1, 1914. Serial No. 828,855;

To all 70]) 0172 it may concern Be it known that 1, JOHN E. WILSON, a citizen of the United States, residing at Pen Argyl, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Saw- Guides, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to saw guides to be utilized in cutting miters on any angle either on planes at right angles to the base of the structure or on angles oblique thereto.

The object of the invention is to provide an implement of this character which shall be simple of construction, highly efiicient' and durable in use, and in which the parts are so constructed and assembled as to re duce danger of derangement in use to the minimum.

lVi-th the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and arrangement of parts of a saw guide, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which like characters of reference designate corresponding parts: Figure 1 is a view in side elevation, partly in section of the implement; Fig. 2 is a top plan view with certain portions omitted; Fig. 3 is a view in front elevation of the saw clamp; Fig. 4 is a de tached detail view of the frame of the saw clamp; Fig. 5 is a sectional detail view of the combined set screws and bolt used in conjunction with the implement; Fig. 6 is a transverse sectional view taken on the line 6-6 of Fig. 1. Fig. 7 is a detail sectional view of the lower portion of the standard and sleeve that support the saw guide.

Referring to the drawings, 1 designates the base of the structure which is preferably of metal, and is provided along its edges with grooves or channels 9. to be engaged by inturned flanges 3 formed on the base of a gage a the latter having combined with it a set screw S by which it may be held securely in position relative to the base. The gage comprises a base 5 and a face plate 6, the latter being disposed at right angles to the long diameter of the base in order to assure the correct cutting of materal where the same is to be squared. A second gage 7 is also provided on the base,'to be used in con-.

junction with that just described, but is devoid of the face plate 6, as this latter gage will be used particularly in holding moldlngs in position while being mitered.

Rigidly secured adjacent one end of the base is a tubular standard 8, the outer face of which is provided with a longitudinal groove or channel 9 that is designed to be engaged by a lug 10 arranged adjacent to the lower end of a sleeve 11, whereby the latter is held against rotary movement relative to the standard, but will be free to slide vertically thereon. The upper end of the sleeve is reduced to provide a circumferential shoulder 12 upon which rests a split collar 13 threaded into the rear wall of which is a set screw 14:, and this screw is hollow to accommodate a plunger 15 having a head 16 between which and the outer wall of the set screw is arranged a coil spring 17, the function of which is normally to hold the plunger in engagement with the sleeve. The collar is held against downward movement upon the sleeve by the shoulder 12, and is provided in register with the inner end of the plunger with a circumferential groove 18 and a series of orifices 19 drilled through the groove and arranged to be engaged by the inner end of the plunger whereby to lock the sleeve at any angle of adjustment, the orifices being provided for setting the implement for cutting standard miters. If, however, it be desired to cut a miter which would not be determined by any one of the orifices 19, then the set screw 1% would come into play, as this could be clamped at a point between any two of the orifices and thus firmly hold the collar against turning.

The collar has projecting from it in parallel relation, two ears 20 and 21 between which is arranged an arm 22 carried by a face plate 23, the scale arm being held pivotally connected with the cars by a bolt 24. In order to permit arcuate movement of the scale arm to allow a miter to be cut at an oblique angle to the vertical axis of the standard 10, the arm is provided with a curved slot 25 through which projects a bolt 26 carried on one end of a thumb nut 27. The upper edge of the arm is provided with a graduated scale as shown in Fig. 2, and this coacts with a master mark 28 scored in the ear 21 and by which the angle of adjustment of the face plate is determined.

Pivotally connected with the face plate, one adjacent to each end, is a pair of links 29, the upper ends of which are pivotally connected with the frame of the guide. This frame comprises a top plate 30 to which the links are pivoted, two end plates 31, a bottom plate 32, and two angularly disposed plates 33 connecting the bottom and end plates, the structure as a whole being integral, that is to say, formed in one part. The end plates are provided with recesses 34 that are designed to receive one side of the back of'a tenon saw, and the other side of which is received between spring clamps 35 secured at their upper ends to the top plate 30 of the clamp, and being free to be swung outward at their lower ends whereby the insertion of the saw may readily be effected and at the same time these clamps will serve to hold the saw properly guided in operation and will prevent wabbling. While primarily the implement is designed more particularly for use in conjunction with a back or tenon saw, it is to be understood that the ordinary hand Saw may be used in connection therewith.

It is thought fromthe foregoing description that the mode of operating the implement will be apparent, but in order that its various uses may be'made clear, a description will be given. Then the parts of the guide are in the position shown in Fig. 1, the saw will make a cut at right angles to the length of the base, but when an angular cut is desired, the plunger 15 is drawn outward, and the collar turned upon the sleeve untilgthe proper angle has been obtained, whereupon the collar is then looked in this position. When it is desired to make miter cuts in the face of apiece of wood, the frame may be adjusted at any angle by loosening the thumb nut 27 and swinging the frame to the desired angle. Should it be desired to miter lumber of greater width than the base, the gages may be removed.

Avery essential feature of the invention resides in the employment of the swinging links 29 by which the frame or head is supported fro-m the collar through the medium of the face plate 23. By the employment of these links the frame and clamps can be thrown out farther over the material, or can be placed close to or moved back therefrom as desired, and it also permits of a higher out being made when the sleeve has been raised to the limit of its upward movement, on the standard.

From the foregoing description it will be seen that although the improvements herein described are simple in-character, that they will be thoroughly efficient for the purposes designed and will coact in'the production of a durable and practical form of saw guide.

Copies of this :patent may be obtained for five cents each, by addressing the Commissioner of latents,

I claim:

1. Ina saw guide, a base, a standard rigid therewith, a sleeve mounted for longitudinal movement on the standard but held from rotary movement relative thereto, a collar rotatably mounted on the sleeve, means for maintaining the collar at any desired adjustment relative to the sleeve, an arm pivotally connected for vertical arcuate movement with the collar and carrying a face plate, links pivotally connected with the face plate, a frame carried bythe upper ends of the links, and resilient saw. clamps carried by the frame.

2. A saw guide comprising a standard, a sleeve slidably mounted thereon but held from rotary movement relative thereto, a collar rotatably mounted on the upper portion of the sleeve, means for clamping the collar at any desired adjustment relative to the sleeve, ears projecting from the collar, an arm mounted for vertical arcuate movementbetween ears, means for clamping the arm at any adjustment, a face plate carried by the arm, links pivotally connected with the face plate, a frame pivotally connected with the upper ends of the links, and resilient saw clamps carried by the frame. H 3. In a saw guide, a base, a standard proj ecting' therefrom, a sleeve mounted for longitudinal movement on the standard but held from rotary movement relative thereto, a collar rotatably mounted on the sleeve, means for maintaining the collar at any desired adjustment relative to the sleeve, an arm pivotally connected forvertical arcuate movement with the collar and carrying a face plate, links pivotally connected with the face plate, a plate carried by the upper ends of the links, and saw guides depending from the plate.

4. Ina saw guide, a base, a standard carried thereby, a sleeve mounted for longitudinal movement on the standard but held from rotary movement relative thereto, a collar ro'tatably mounted on. the sleeve, means for maintaining the collar at any desired adjustment relative to the sleeve,'an arm pivotally connected for vertical arouate movement with the collar and carrying a face plate, links pivotally connected with the face plate, a plate pivotally engaged with the links, saw guides depending from the plate, and means coacting with the pivotal connection between one of the links and the plate for maintaining the plate at any desired adjustment relative to the face plate. In testimony whereof I hereunto affix my signature in the presence of two witnesses.

JOHN E. WILSON. Witnesses:

C. M. SMITH, ELwooD BONNEY.

Washington, D. G."

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