US89124A - Improvement in mitre-box - Google Patents

Description

time tatnt Letters Patent No. 89,124, elatedl Apo-'il 20, 1869.

IMPROVEMENT IN MITRE-BOX The Schedule referred to in these Letters Patent and making part of the lame.

To all whom it may concern Be it known that we, ROBERT BURGHELL and ROB- ERT T. BURCHELL, of Trenton, in the county of Mercer, and State of New Jersey, have invented a new and improved Mitre-Box; and we do hereby declare that the following is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a perspective view of our invention.

Figure 2 is a plan view of the same.

Figure 34is a detail plan View, illustrating the manner of adjusting the guides to the scribed line.

Similar lettersof reference indicate like parts.

The object of this invention is to provide an irnprovd apparatus for guiding handsaws in the opel-af tion of mitring strips of wood, as mouldings and the like; and

It consists in the combination of parts, as will be hereinafter more fully described.

In the drawings- A is a rectangular frame, of metal, surrounding and holding the wood bottom, B, affixed therein by screws through the frame.

This frame A is provided with two parallel and slotted anches, C C, arranged one on each side of the frame, as shown.

It is also provided,'on one side, with two projecting plates, D, on a line with the slotted anch of that side.

These plates are formed with dovetailed slots, in which the dovetailed feet E of the standards, or rests F G tit and slide, to adjust the said standards, with referenceto the other parts of the apparatus, when required.

A middle standard, H, is also provided, and is attached to the Hauch C by means of a screw-bolt, a, passing throughV its slotted foot I and the slot of the Hauch O. The screw-bolt is provided with a burr underneath the ianch C, by means of which the said standard is clamped iirmly in place. The ,slot in the foot I permits its adjustment to or from the wood, B, on which the moulding to be mitred rests.

This standard is particularly designed for such short pieces of moulding as will not reach from one of the standards to the other.

The standards G are clamped in place by means of set-screws b, passing through the slots in the feet E, and working in hollow threads in the plates D.

The saw-guides on the same side with the standards are composed of the two general parts, J K L and M N.

The rst part consists of the guide-plate J, having its slotted foot K clamped to the separate plate L by a clamp-screw, fl, passing through the slot, and working in the plate L. By means of the slotted foot, the plate J, is adjusted to or from the guide-plate M, to accommodate saws of different thickness.

The plate L slides in a dovetailed slot in the footextension N of the guide-plate M, and'is clamped thereto by a clamp-screw, c. The plate L and its clamp-screw permit the adjustment of the edge of the guide-plate J to the scribe-mark on the moulding to be mitred.A

From the bottom of the foot N, there projects a threaded stud, which passes through the slot'in the flanch G, and is provided with a nut, or burr, to clamp the foot to the flanch.

This stud is located under the guide-.plate M, is identical, in its function, with the similar stud f and burr g of the guide-plates O P on the opposite side of the frame A. These latter guides are only adjustable for the thickness of the saw, and alignment with the scribeline and opposite corresponding guides and the mitreangle.

The part Q is formed with a foot, R, sliding in a dovetailedy slot in the foot P of the guide-plate O, as shown.

lz is the clamp-screw, operating as described, for the other guides.

Fig. 3 illustrates the manner of setting the edge of the guide-plate J up to scribe-line n, whenthe angle of the mitre is such as prevents the face of lthe same from coinciding with the line t-i of the standards.

It will be observed from the foregoing that the mitringguides are adj ustable- Y First, for dierent angles of the mitre -joint to be made.

line.

Third, to di'erent positions along in the slotted anches, and, in addition thereto, the guides on the standard side are adjustable to the scribe-mark, as

shown in tig. 3.

The apparatus also comprises a set of guides for cutting o" the moulding at any desired bevel or angle, or with a square end. These guides are shown at S S' S S', and are mounted on the squared ends of a rod passing through the frame A and its Wooden bed B, one pair of guides being aixed to the rod, while the other fits loosely on the other squared end, which latter terminates outside of the guide with a threaded end, on which a clamp-burr, or nut,I k, works. -The intermediate part of the rod is circular, and its bearings are aiorded by the frame A, through which it passes.

The guide-plates S are provided with slotted feet T, in the slots of which the feet T of the guide-plates S slide.

Second, for the adjustment of the opposite guides to the proper alignment with each other and the scribe l are clamp-screws, passing through slots in the feet The combination, in a mitringapparatus, of the T', and serve to clamp the guide-plates S to their guide-plates M N and J K with the plate L and clampproper adjustment for the thickness of the saw. screws d e, substantially as and for lthe purpose shown All the guide-plates are faced with wooden tablets, and described.

lm, to prevent injury to the saw. ROBERT BURGHELL.

The moulding is rested against the standards, and ROBERT T. BURCHELL. the operator stands on the opposite side of the apparatus. Witnesses Having thus described our invention, CHARLES LAYTON,

We claim as new, and desire toy secure by Letters CHARLES FISH. Patent-

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