US832259A - Miter-box. - Google Patents

Description

PATENTED OUT. 2, 19-06.

B. HOYSRADT MITER BOX. APPLICATION FILED 00 2 SHEETS-SHEET 1.

THE NORRIS PETERS 'PATENTED OCT, 2, 1906.

E. HOY SRADT. MITER BOX.

APPLICATION FILED OUT. 25, 1905.

2 BEEBTS SHEET 2.

ERS ca, wasumcnm, n. c.

' UNITED STATES PATENT OFFICE.

MlTER-BOX.

Specification of Letters Patent.

Patented Oct. 2, 1906.

Application filed October 25, 1905. Serial No. 284,280-

1'0 allZ whom it may concern.-

Be it known that I, EDWIN HOYSRADT, a citizen of the United States, residing at Mount Vernon, New York, have invented certain new and useful Improvements in Mitor-Boxes, of which the following is a specification.

My invention relates to that class of miterboXes which are provided with movable sawguides adapted to be set at various angles and positions, so that the saw shall cut the material in the desired line; and my improvements consist in the particulars hereinafter set forth.

In the drawings, Figure 1 is a plan view of my improved miter-box, the top board being broken away from the right-hand portion. Fig.2 is a front elevation of the same. Fig. 3 is a plan view of a portion of my miter-box, showing the saw-guides in a folded position.

Fig. 4 is a cross-sectional view taken on the line X X of Fig. 1 looking in the direction of the arrows. Fig. 5 is a top view of one of the saw-guides. Fig. 6 is a vertical view of the rear saw-guide, the upper portion being in section; and Fig. 7 is a plan view of the swivelblock, rod end, and clamp.

Similar letters of reference designate similar parts in all the figures.

A is the frame of the miter-box, which is preferably made of light metal and which is provided with segmental rails 60 a and a bearing member I) to carry the swivel-block C. The member I) is preferably provided with a slot (1, and the swivel-block is locked in position by means of a set-screw a, passing up through the slot and threaded into the swivelblock.

D is the swivel-rod, which is provided with a guide-block F, traveling between the tracks a a, the rear end of the rod passing through the swivel-block O and being threaded to receive the thumb-cap G. The top and bottom shoulders of the guide-block F, extending outside of the tracks a a, are undercut, as shown in Fig. 4, so as to grip the edges of the tracks and draw them down against the block when it is clamped against the tracks, as hereinafter described. The forward saw-guide H slides upon the rod D and has a slot 11 on its under side to receive a projection h in the bore of the saw-guide H and also to receive the end of the thumb-screw Lwhich locks the saw-guide at the desired point on the rod. The rear saw guide J fits in a socket Z in the rod D. With the exception of their lower portions, by which they are attached to the rod D, the saw-guides H and J are of the same construction, each being provided with a vertical slot j, a central bore K, with overhanging lips k k, and stiffening-ribs n n. In the bore K slides the saw-back guide 0, provided with a slot 0 and with stop-pins p 1). Each sawback guide is inserted into the bore K of its saw-guide by bringing its ins p 1) into position to slide down throng the open end of the slot j, and when the pins 10 go have passed below the overhanging lips 7c 7c the saw-back guide may be rotated so as to bring the slots k and 0 into line and permit a saw-blade to be passed through them. The saw-blade will then look the saw-back guide in sliding connection within the sawguide, because while the former can slide up like a piston within the latter until the pins p p engage beneath the lips 1c lc the saw-blade will prevent the saw-back guide from being rotated so as to bring the pins into position to be raised through the slot, which, however, can be done when the saw-blade is withdrawn.

Q is a top board upon which the work is laid, and R R are rods, which may be threaded or otherwise detachably inserted into the top of the frame A and which serve as backstops for the Work.

S S are legs detachably attached to the frame by means of the thumb-screws s s.

The operation of my invention is as follows: The miter-box having been assembled, as shown in Figs. 1, 2, and 4, the guide-rod is swung to any desired angle, as illustrated in broken lines in Fig. 1, and is also rotated so as to give the guides any desired variation from a vertical positionfor instance, as shown by the broken lines in Fig. 2. The thumb-screw G is then tightened, drawing the rod D through the swivel-block O and bringing its shoulder d up against the swivelblock C and also drawing the guide-block F against the tracks a a, which operation will lock the guides securely in place. The work to be cut is then placed upon the board Q and pushed back against the stops R R. The saw is then slipped through the slots in the saw-guides, the saw-back guides 0 being foo raised, as may be desired, to accommodate the saw-blade. The work is then cut by the saw in the ordinary manner.

The slots in the saw-back guides being narrower than the slots in the main guides serve to center the saw-blade, so that its set teeth will have free play in the main slots without striking their edges, and thus chilling the teeth and injuring the guides.

When it is desiredto knock down the miterboX, the legs S S are removed by unscrewing the thumb-screws s s. The stops R R are withdrawn and may be slipped inside of the frame between the tracks a a, if desired. The thumb-screw I of the guide H is loosened, and the guide is slid out along the rod D. The thumb-cap G and screw 6 are loosened. The saw-guide J is given a one-quarter turn to bring its side flanges n plane of the rod D. The guide-block C is slid forward, and the saw-guides are folded down into the position shown in Fig. 3. The miter-box is then in a very compact form, so that it can be conveniently carried in a carpenters boX or other small receptacle.

' By means of my improvements I secure a miter-box which can be quickly and simply adjusted to different positions and angles in which an ordinary saw can be used without injury to its teeth and which miter-box can be readily-knocked down and packed in a very small compass.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. The combination, with a miter-box frame, of a guide-carrying member, mounted upon a horizontally-adjustable pivot sliding from front to back in a slotted track, and provided with guides having vertical slots therein adapted to give free play to the setteeth of a saw-blade and secondary, saw-back members mounted within said guides and provided with relatively narrower, vertical slots therein and adapted to receive the flat back but not the teeth of such saw-blade.

2. The combination, with a miter-box frame, of a guide-carrying member mounted upon a pivot-block horizontally adjustable fromfront to back upon a slotted track in said frame and provided with guides having vertical slots therein adapted to give free play tothe set-teeth of a saw-blade and sec ondary, saw-back members mounted within said guides and provided with relatively narrower and shorter, vertical slots therein adapted to receive the flat back but not the teeth of such saw-blade, and means for look ing said pivot-block in the desired position upon said slotted track.

3. The combination, with a miter-box frame provided with segmental guide-track members, of a guide-rod pivoted in the rear n parallel with the undercut shoulders against the edges of said guide-track members.

5. The combination, with a miter-box frame, of saw-guides mounted upon a guiderod journaled horizontally adjustable from front to back of the miter-b OX upon a slotted track, and which saw-guides are adapted to be folded into the plane of the frame by the turning of said rod.

6. The combination, with a miter-box frame, of saw-guides mounted upon a guiderod journaled in a horizontally-adjustable pivot-block, and adapted to be folded into the plane of the frame, with the rear sawguide slid within the frame.

7. The combination, with a miter-box in a pivot-block, which block is frame provided with segmental guide-track members, of a guide-rod provided with a guide-block having undercut shoulders and traveling between said guide-track members, a shoulder upon said guide-rod and a screwthread upon its end, a pivoted block to receive said guiderod, and means, consistin of a threaded thumb-cap, to retract said roc through said block and thereby clamp its shoulder against the block and also clamp said undercut shoulders against the edges of said guide-track members.

8. The combination, with a miter-box frame, provided with segmental guide-track members, of a guide-rod provided with a guide-block having undercut shoulders and traveling between said guide track members, a shoulder upon said guide rod and a screwthread upon its end, a pivoted block, horizontally adjustable upon a slotted track, to" receive said guide-rod, and means, consisting of a threaded thumb-cap, to retract said rod through said block and thereby clamp its shoulder against the block and also clamp said. undercut shoulder against the edges of said guide-track members.

9. The combination, with a -miter-boX frame, of a vertically-slotted saw-guide and a detachable, slotted saw-back member locked in sliding connection therein by a saw-blade passing through the slots in said guide and saw-back member.

10. The combination, with a m1ter-box frame, of a tubular, vertically-slotted, saw-. I its locked conneetion With said guide when gtlide PIiOVidd Yvith a t0 1)1st01p, and a deiiaehlg the saw-blade is Withdrawn.

a e, cy indrica vertica -s otted sawac 5 member locked in slidingzzonnection in said I EDWIN HOYSRADT' guide by a saw blade passing through the Witnesses:

slots in said guide and saw-back member, I WM. D. NEILLEY,

said saw-back member being rotatable out of WILLIAM H. MOHR.

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