US716522A - Miter-box. - Google Patents

Description

No. 7l6,522. Patented Dec. 23, I902.

M. D. CONVERSE.

MITER BOX.

(Application filed Jun 18, 1902 (No Model.) 2 Sheets-Sheet l.

UlTED STATES PATIENT. OFFICE.

MASOI-IIL D. CONVERSE, OF NEW YORK, N. Y., ASSIGNOR TO JOHN J. TOWVER, OF MONTCLAIR, NEW JERSEY.

\VllTER-BOX.

SPECIFICATION forming part of Letters Patent No. 716,522, dated December 2 1902- Applioation filed June 18, 1902.

To all whom it may concern.-

Be it known that I, MASOHIL D. CONVERSE, a citizen of the United States, residing at New York city, borough of Manhattan, in the county of New York and State of New York, have invented certain new and useful Improvements in Miter-Boxes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My present invention relates to improvements in miter-boxes of the type described in a prior application for patent made by me, bearing SerialNo. 80,318 and official file date October 28, 1901, and more particularly to means for keeping the saw-guide from sliding down on the pivotal post when it is desired to swing the former from one radial position to another to make two or more cuts of equal depth with a back-saw and to means for adjusting the guide to different gage or thickness of saws, the objects of the invention being to improve the efficiency of such tools, all which I accomplish by means of the devices hereinafter fully set forth and claimed.

In the drawings, Figure 1 is a front elevation of a miter-box complete of the type referred to with a portion of the upright part, which is usually of. wood, broken away, and Fig. 2 is a plan view of the same, both showing my presentinvention incorporated. Fig. 3 is a left-hand side elevation of the sawguide removed from the pivotal post, further showing my present invention. Fig. 4 is a vertical transverse cross-section on line a; 00. Fig. 5 is a horizontal transverse cr0ss-section on line y g, respectively, of Fig. 3. Fig. 6 is a horizontal transverse cross-section on line a z of Fig. 3; and Fig. 7 is a vertical transverse cross-section on line o o of the same figure, all illustrating the construction, application, and operation of my invention, as will be hereinafter more fully shown in detail.

Like letters indicate corresponding parts throughout the several figures.

A is an upright member, usually of wood,

Serial No. 112,194. (No model.)

one edge of which is secured to a horizontal base 13, also usually of wood, so as to be at exact right angles to'the latter. To this upright is secured, by means of screws or 0therwise, a bracket O, and in the base of this bracket an upright cylindrical pivotal post D is fixed firmly. Upon the post D the sawguide is pivoted, as shown, by passing the former through a vertical hole in the enlarged 6o portion of the same at I. The saw-guide is composed of two quite similar halves G and G and in my present invention are adjustably secured together instead of rigidly by the following means: A pin or riveti is passed laterally through two halves in the upper part of the saw-guide and a washerj between. At a point just about central of the bases of two upwardly-extended ears L L and below the level of this rivet or pin 2' are inserted, pref- 7o erably from the right hand, a screw 3 forward and another, rearward and near the top of the extensions L and L a third, s,all passing through holes in the right-hand half with a clearance fit and all screwed into neath the bifurcated clamp through which the thumb-screw 0 passes, I have in my present invention cast or formed a cylinder, the bore N of which intersects the pivotal-post hole and into which bore is inserted and secured, with free fit and slight longitudinal play, a pluno ger-pin P, having its enlarged end concaveshaped at e to correspond with the circumferential lines of the post D and provided with arearward stem 7", of reduced diameter, which is passed through the coils of a powerful compression-spring t within said bore and presses firmly against the plunger and the end wall of the bore, so as to force the concave end of the former firmly against the surface of the post D, as seen in Figs. 6 and 7. ger is kept in place against loss or disarrangement by slightly riveting the end of the stem (See Figs. 1 and 3.) The saw-guide So This plun- 10o projection on the external side of the hole in the end wall of the bore through which it passes, forming a head h.

In the use of miter-boxes of the type to which my present invention relates it has been found that when saws of different gage or thickness are inserted in the guide there is no means of adjusting the guide to a proper tension on the saw. Now it will be clear to those skilled in the art that in the case of my present invention the opening Q, (see Figs. 1 and 2) can be enlarged or diminished at will and quickly by manipulating the peculiarlylocated screws 8, s and 8 since the washer j, through which the pin or rivet'ipasses, separates the halves ofthe guideslightlyand forms afulcrum-bearing, upon which the right-hand half G of the saw-guide can be rockedas, for illustration, by loosening screws 3 and s and then tightening screw 3 the opening Q would be enlarged, and vice versa, and by loosening one and tightening the other of the screws 8 or s the opening Q from front to back may be kept uniform of dimension. It has also been found in the use of this type of llniter-boxes when it is required to make two or more cuts of equal depth at different angles transversely of the work that after adjusting the saw-guide at the proper height on the post D to gage the required depth of cut and having secured the saw-guide and finished the first out upon loosening the thumbscrew 0 and lifting up the wedge-key K, both being necessary operations to enable the sawguide to be swung to the new position, the latter would of its own weight slide down on the post D, and thus the proper-depth gage would be lost. It will be seen that by my present invention I overcome this difliculty, for in these operations the concave end e of the plunger-pin P is pressed against the post with such tension by the spring that the saw-guide cannot slide down, but is supported at correct height while the latter is successively swung to and clamped in the position required.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is v 1. In a miter-box of the type described, a bracket, an upright cylindrical post fixed therein and a saw-guide pivoted on said post, in combination with a frictional spring-actuated tension device carried by said saw-guide and in frictional engagement with said pivotal post.

2. In a miter-box of the type described, a bracket, an upright cylindrical post fixed thereto, and a saw-guide pivoted on said post, in combination with a spring-actuated plunger carried by said saw-guide and provided with a concave recess in its end in engagement with the surface of said post.

3. In a miter-box of the type described, an adjustment mechanism comprising a transverse rivet in the upper portion of the sawguide, a washer or equivalent surrounding said rivet and between the halves of said guide, in combination with three transverse adjusting-screws triangularly disposed about said rivet.

In testimony whereof I aflix my signature in presence of two witnesses.

MASCHIL D. CONVERSE.

Witnesses:

J. ALBERT SHOEMAKER, JAMES A. MORAN.

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