US507742A - Adjustable mitering-machine - Google Patents

Description

(No Model.) I 2 Sheets--Sheet 1.

J. LUSGI-IER. I ADJUSTABLBMITEBING MACHINE. No. 507,742. Patented 0011.31 1893-.

- IIIII'IIIIIIII" l 6 UNITED STATES PATENT OFFICE.

JOHN LUSOHER, on ST. LOUIS, MissoURI.

ADJUSTABLE MlTERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 507,742, dated October 31,1893.

Application filed March 13, 1893. I

To all whom it may concern.-

Be it known that 1, JOHN LUsOHER, of the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Adjustable Mitering-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in an adjustable miter-box, and consists in the novel arrangement and combination of parts as will be more fully hereinafter described and set forth in the claim.

The object of my improvement is to construct a device of this class which embodies improved parts, adjustable to any desired angle at which it may be desired to cut the miter. The improvement is also constructed in such a manner that its durability is unquestionable, and one of its main features lies in providing the guides with common centers, thus enabling the measurement to be taken from said centers inorder to obtain any desired angle.

In thodrawings: Figure 1 is a perspective view of my complete invention, showing a saw in position as indicated by dotted lines. Fig. 2 is a top plan view of my complete invention, showing different angles at which the guides may be placed, both by dotted and solid lines. Fig. 3 is an end view of the miterbox. Fig. at is an enlarged detail elevation of a portion of one of the adjustable base frames. Fig. 5 is a similar elevation of a complete base frame. Fig. 6 is a top plan view of the modified form of the miter-box. Fig. 7 is an end view of the same. Fig. 8 is a vertical sectional view taken through the line A-A in Fig. 6. Fig. 9 is an enlarged elevation of the base frame of the guide as used in the modification. Fig. 10 is an inverted plan view of the base frame. Fig. 11 is a rear end elevation of the base frame and guide removed from connection with other parts.

Referring to the drawings: 1 indicates the base-board which it may be said, forms the foundation for the construction herein described and claimed. Secured upon the upper side of the base-board 1 are a number of blocks 2 which serve to elevate a plate 3 above said base-board 1, so as to provide a clear space between said baseboard and said Serial No. 465,780. (No model-l plate, the relative position and size of the blocks 2 being shown by dotted lines in Fig. 2. The plate 3 is not of the same width as the base-board 1, but along its straight inner edge, is provided with upwardly projecting, preferably metallic plates 4, located at right angles with the surface of said plate 3, and held in an alignedupright position by braces 5 secured upon the base-board 1. The plates 4 are not continuous butleave open spaces between their ends, which allow the operation of certain parts hereinafter described. Pivoted under the plate 3 adjacent its inner edge, and immediately under the space between the ends of the plates 4, are frames 6 upon which are mounted the guide blocks 7. Said frames 6 consist of metallic plates provided upon each end with diverging slotted arms 8, which givesaid ends somewhat the-appearance of a Y. The arms 8, are provided with slots 9 through which screws 10 are placed and which pass upwardly and engage the blocks 7. Projecting upwardly from the outer edges of the arms 8 are plates 11 which are provided upon their upper edges with extensions 12, which are only about one-half the thickness of saidplates 11, and are adapted to be engaged by a small plate 13 which is screwed into the blocks 7. The inner edges of the arms 8 are surmounted by upwardly projecting strips 14 which'engage in cut out portions in the under side of the blocks 7, and assist in keeping the same in a rigid position. The blocks 7 consist of a straight center guide strip 15' upon the outer sideof which are secured triangular shaped blocks 16 which are engaged by the plates 11 and 13. Both ends of the base frame 6 are similarly constructed, and the pivotal point of the complete guide is near one end, the relative location of the guides and the remainder of the construction being particularly shown in Fig. 2. Secured to the outer edges of the base frame 6 are pro jecting curvilinear slotted arms 17, said arms being adapted to operate in connection with a set screw 18 by the use of which, said guides can be set in any desired position. This function is especially illustrated in Fig. 2 where the scope of possible movements is clearly shown. The plate 3 has its outer edge curved and cut away to allow the free movement of the guide, as around a quadrant. Upon the rounded edges of said plate 3 are placed ;indicating saw-cuts .or other marks to denote the difi'erent angles at which the guides may be placed. Secured upon the frame 6 and near the outer guide is an indicating pointer 19 which points toward the indicating marks 20 arranged along the curvededge of the plate 3. A slight passage is left between the strips 15 of the blocks 7 in order to'allowthe inset; tion of the saw. The plates 4 provide aback, against which the timber to be cut is placed. and held firmly bythe [hand oracle-mp during the operation of cutting the joint.

Reference to Fig. 3 gives -a'clear-andcon-I- cise idea of the relative arrangement of the parts,nFig.;2 also enabling the observerto note the many positions zand angles which :the' guides tmay attain.

I liave :nowiully described the construction of theniiter-box, as designed ifor thecu't ting of large "timbers, and I will nowproceed; with the description of what I have shownas aimodification, the same being especially .de- 1 signed for use in :small .moldingrandquarterl strips,,aud ;in this construction lapplythe same iprinoiple, but with a silnpler mannerfiof adj ustingtheguides for use. The base boards 21,,upon whichiaresecured. the blocks 22 elevatea ,plate 23 as in a con. struotion hereinbefore described, and theiinneriedge of=the plates 23 is surmounted .bya: metallic :plate 24. against which ithe timbers are placed when it is desired to icutithe joint. The base :filfame 25 is .of a construction nearly similar to thetoonstruction before ;rep g fenred -to,- the .sarne :having similar arms :26 and guide-blocks 127. As this construction. has been beforedetailedd will not .en'teriinto a specific description of the same.

The frame 25 is provided with a ,projeoting curvilinear slotted arm 28,the .operation tr which .issimilar to the arm 18 upon the base frame 6.

I desire toicall particular attention to the. fact that the guides in the .orginal ,construci tionishown in the firstisheetiof thedrawings, have what might be 'tenrnedaoommon .centen -that is, the passage for the guidance of V theysaw-points to the indicating mark on the inner iedge-of the plate 3 :at mhateveriangle said guide maybe placed. This isialso itrue of the construction shownlon the secondrsheet OfEth6$dl3tWi11gS,-th6 single guide having the same function. r

The construction of .myinventionis such that the securance of the iblOOkS 7 and 27 prevents the warping of the same to change the location of the passage or guide for the saw, and the general construction is intended to eliminate any possibility of the parts becoming deranged, t-hus preventing a perfect operation of the parts.

The-denicecould .be constructed with any number of guides, without in any way materially altering the idea of my invention.

Having fully described tiny-invention, what I claim is-- The improved miter box, consisting of a baseboard 1, a series of blocks 2 mounted on said plate 3 and ipivoted insaidspacaguideblocks 7 mounted vertically uponisaid rfirame 6 ,said frame 6 comprising :a :metallic plate provided at its end with diverging slotted ,anms 8,screws :10 engagingslots inasaid arms,

and wscrewing said blocks ,7 H10 said arms, plates 111 projecting aipward from the outer edges of .said arms, and provided inpon their upper .edges with extensions lflwhich arereduced in -.thickness,-smfltll plates 13 which enage-said extensions 12 .and .are screwed to the blocksg7,itheimnerledgesiof said arms 8 surmounted by upwardlyprojecting strips 14, which engage cut-out portions in lithe underside of said blocks and assist in keeping the same in a rigid position,said blocks 7 :havin g st aightiguide-strips .15, upon :the outer side of whicharescrewedtriangular shaped blocks 16 ,iwhich are engaged bytheplates l1 and13, and lmeansior secuningsaid :frame 6, andithe devices carried by fit, :at waniyidesired angle with relation :to the back-plates 4,:substantiallyas herein specified.

Initestimony iwhereof Iaffixmy; signaturein presence of two witnesses.

JOHN LUSQH'ER.

Witnesses:

HERBERT S. ROBINSON, ALFRED A. EroKs.

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