US42550A - Improvement in mortise and draw-bore delineators - Google Patents

Description

Marten drains PATENT Orricn.

REUBEN BLOSS OF ROCHESTER, NEW YORK.

Specification forming part of Letters Patent No. 412,550, dated May 3, 1864.

To all whom it may concern.-

Be it known that I, REUBEN BLoss, of Rochester, in the county of Monroe and State of New York, have invented a new and useful System of Spurs for Laying Out Mortises and DrawBores; and I dohereby declare that the following is a full, clear, and exact description thereof, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a plan or top view of my invention, the red lines showingthe different positions of the stick while being laid out.7 Fig. 2 is a side elevation of the saine. Fig. 3 is also a top view, but showing the sliding rest moved to the opposite side from that shown in Fig. 1.

Similar letters of reference indicate correspondin g parts in the several iigures.

This invention consists in the employment of a system of adj ustable gage spurs or points, so arranged and applied in a bed-plate (having a sliding frame or rest upon which the stuff to be laid out is placed and held) that they may be setto any size mortise required, and at any desired point in the stick, and by other spurs fixed in the sliding frame the draw-bores are also readily marked. By means of this system one man will do the work of from five to six, operating in the ordinary way of laying out mortises and drawbores in small frames.

To enable others to make and use my invention, I will describe its construction and operation.

A in the drawings represents the bed plate ofthe apparatus. B and B are the cross-bars of the sliding frame; C, the adjustable blocks in which the mortise-spurs@ are fixed. These blocks are fitted in the groove D, where they are held by set-screws n, Fig. 2, from the under side.

The bed A may be provided with a groove similar to D to receive blocks for the spurs b. If several mortises are required in the same side or edge of a stick, there may be as many sets of spurs arranged in the groove D. This bed-plate A has two lateral gains for the guides G of the sliding frame to work in. This frame is composed of the two guides Gr and the bars B and B. The bar B has a central rib or rest, r, with a transverse head, t, used as a gage, against which the end of the stick or the shoulder of the tenon, as the case may be, is placed preparatory to marking the draw-bores. Bl has a similar rib, r', and head t', for the same purpose. These bars B and B' may be provided with grooves similar to D and with blocks C for adjustable spurs.

The head t of bar B may be grooved to receive adjustable spur-blocks for the spurs c, which are used to mark the draw-boresof the tenons. The spurs e mark the draw-bores of the mortis'es.

A stick(indicated by the red lines E, Fig. l) is placed on the guides G, with its workedge against the front edge of the bar B, and the shoulder of the tenon against the projecting rest d. The sliding frame is then moved forward to the position shown in Fig. 3, the point of the spurs a reaching just far enough above the lower face of the stick to mark the mortise perfectly. The frame is then drawn back, the stick turned over, and the operation repeated. This marks the length of the mortise on both sides or edges of the stick, which is then placed with its work-corner down and against the rib r, and the shoulder of the tenon against the head t, when it is forced down upon theI spurs c and e by a mallet or by a rap of the` hand, thus marking the draw-bores of the mortise and of the tenori, if the stick has a tenon.

The object of the bar B and spurs b is to mark a mortise on a side ofthe stick in which but one mortise is required, and that at a different point from that marked by spurs a. Here the stick-is placed as indicated by the red lines F, the shoulder of the tenon being placed against the rest m. The thickness of the mortise is marked with an ordinary mor tisegage.

It will be seen that this mortise and drawbore delineator is applicable to every variety of small frames.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, 1s-

The combination and relative arrangement of the system of mortise and draw-bore spurs a, b, c, and e, substantially as specified, when they are used in combination with the bed A and the sliding frame.

REUBEN BLOSS.

Witnesses:

WM. S. LoUeHBcRoUGH, P. T. TURNER.

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