US68791A - Ors to j - Google Patents

Description

@uitrit gisten @anni @ffice JOHN RICHARDS AND WILLIAM H. DOANE, CF CINCINNATI, CHIC, ASSIGN- CRS TO J. A. FAY & CC., CF SAME PLACF.

Letters Patent 68,791, dated September 10, 1867.

IMPROVEMENT IN- MORTISNG MACHINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, JonaT Rrcnnnns and WLLLLlu il. Down, of Cincinnati, county of Hamilton, and State of Chio, have invented certain Improvements in Mortising Machines; and wc do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawings7 forming a part of this specification, in which- Figure 1 is a side elevation of a mortising machine having our improvements, with a portion of the main column removed to show the mechanism within. i v

Figure 2, an enlarged diagram of the eccentric yoke and cam-hook for reversing the chisel-bar, and

Figure 3 a diagram showing an enlarged view of the mechanism for moving the reversing-bar.

Similar letters of reference on the different tigurcs indicate corresponding parts.

The nature of this invention consists, first, in a novel mechanism for reversingthc chisel automatically while in motion, by means of an eccentric yoke, cam-hook, and a pawl to move the reversing-har alternately in reverse directions; secondly, in the usc of a ratchet and pawl for adjusting the trcadle so as to produce agreater or less throw of the table, as the nature oi' the work muy demand, such adjustment being instantaneous andV more convenient than modeshitherto employed; and thirdly, in an improvedmanncr of feeding the wood to the.

chisel by means of a frietional roll of gum or other material, accomplishing the functions of what is known as acompound table, with a' cheaper and more simple mechanism.

To enable others skilled in the art to make and use our invention, we will proceed to describe the manner of constructing and the mode of operating the same with the aid of the drawings.

In tig. l A' represents the main column, forming the support on which the machinery is mounted, with the side removed to show the mechanism within. B is the 'treadle for operating the table C. It is hinged at D,-

and is adjustable at different heights by means of thelpawl and ratchet shown at E, 'which determines its position with relation to the pivoted lever-piece F, and also regulates the throw of the table, which is moved by the link H and rod I, passing through stem J, which is fastened into the table C, and works in a slot iu the front of the post A. K is a feed-roller, of India rubber or other similar material, and is revolved by hand-wheel L and bevel-gear M, the roll resting at the bottom on the face of the match-gear below, which is not shown in the drawing. N is apiece of wood being mortised, and is kept down upon the tablc-platc O and iu proper position by means of the guard P, which adjusts to talic pieces of diil'erent depths. The piece N is moved by the friction oi' the roll K in either direction to suit the length of mortisc requiredl Screw Q is to adjust the roll K. The main table-.support C is pivoted on the plate It, so as to form angular inortiscs. S is the ehischbar, receiv ing motion from shaft T by means of cranlewhcel U and pitman V. Sg is a shell carrying the lugs t t, in which the bar S revolves by means of the reversing device at the lower bearing W, consisting of the gearing X, pulley Y, and belt Z. The hub of the gear c forms a shell around the chisel-shaft S, and passes down through the bearing at W, having a feather orpsplinc for revolving the bar S. On thc lower or bottom end ci this shell is formed a eam-hool:, shown at 2, which works in the yoke CZ, and holds the chisel in the proper position for cutting in either direction, the belt Z meanwhile slipping around the pulley Y. lo reverse the chisel the yoke o? is moved in the direction indicated by the arrow, iig. 2. This releases thc hook hl, and the chisehshaft instantly revolves until this hook E comes in contact with the other stop, making precisely a halt' revolution. The yoke d is moved by the bar g passing through and into thc column, as shown. 'lhis bar rests upon the cross-piece shown in section at 7i, and on its top is formed the double concave, which will be better understood by referring to the diagram, iig. The rod t' rises and falls with the tabl/c C, and Vcarries the pawl m, which swings loose en pivot 1t, and passes alternately von the different sides of the pointy', moving the bar y in diierent directions at each motion of the table. In iig. 3 the bar is shown as moved to the right. At the next motion of the rod z' the pawl m falls into the position shown by red lines iniig. 3, and as the table comes down passes on the other side of point r, striking against the shouldcrjv, moving the bar y to the left, allowing the chisel shaftS to turn half round, as before explained. g/s the driving-pulley.

Having described the nature of our invention, and the manner of-construoting the same, we do not claim adjusting the treaciieofamortising machine to eperte at di''erent heights, this principle beingeld and applied to both foot and power mortising machines; but what we claim, and desire toseeure byjLettexs Patent, is-

1. The pawl w, for adjusting the treadle, arranged and operating substantially as described. 2.. The yoked and devices g', m, r, and z', for reversing the chisel,v as herein set forth and described; 3. The roller K, for feeding the'stui to `the chisel, operating in the Inannlenand'forvthc purposes described.

WM. C. HARD, W.- R. HYDE.

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