US138649A - Improvement in mortising-machines - Google Patents

Description

Pafented May 6,]

E. H A M M G N D Mortising-Machines.

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UNITED STATES EUGENE HAMMOND, or CUMBERLAND, MAEYLAN] IMPROVEMENT IN MORTISlNG-MACHINES.

Specification forming part of Letters Patent No.

February 14, 1873.

To all whom it may concern:

Be it known that I, EUGENE HAMMOND, of Cumberland, in the county of Alleghany and State of Maryland, have invented a new and useful Improvement in Mortising-Machines; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawing forming a part of this specification, in which Figure 1 is a front elevation. Fig. 2 is a vertical cross-section. Fig. 3 is a top view of the slide.

Theinvention consists in the improvement of mortising-machines, as hereinafter described and pointed out in the claims.

In the drawing, A represents the upright frame of a mortising-machine, in which is rotated the crank-shaft B, having thereon the crank-wheel 0, connected with the swiveled mortising-chisel D by a strap, (1. a a. are the guides through which the chisel travels in its upward and downward movements. E is a carriage having an upright piece, through which passes a clamp-screw to hold the work in its place; also having the usual rack, which is moved by a pinion, f, on the shaft F, to feed the stuff to the chisel or to enable it to be adjusted into the exact position required.

These matters being old and well known to the public, I do not desire to make any claim upon them.

In the back-board of the carriage E is a long recess or groove, 0, in which are placed the spring spacing-gages G G, which are slotted and provided with a set-screw, g, to enable them to be brought further forward or backward. The relative distance of these gages from each other regulates the distance between the mortises.

One mortise being made while the end of the post abuts against the right-hand gage G,

the latter is pushed into the recess 0 and the post slides along until its end strikes the second gage, G, when another mortise is made, and so for any number, the gages, of course, corresponding to the number of mortises desired.

If it is desired to mortise posts of any kind that have round, tapered, or beveled ends, then I use the hinged gages G G, which are PATENT O4 FICE.

138,649, dated May 6, 1873; app

right-hand gage, which is th I raised and receives the post, which is m d back against it; or the reverse may takplace, the post being brought first against the right-hand gage, and after the mortise i finished moved back a little to allow this g go to be closed down into the recess 6, when he post is a ain moved forward to the other g H is a traveling-dog that, I as the pawl or pin it fastening in the holes 6, of carriage, and the rear subjacent spring h; that holds the pawl locked in said holes. is a dovetailed tongue on the under side of 0g, which slides in the corresponding ways 0 1 he frame A.

By this device I proposel 0 out different sized mortises in the same s ff without tak ing it out of or stopping t: machine, thus obviating the necessity of h ndling the stuff twice, and consequent loss 0 time.

I is an adjustable gage, w ch is slotted in its shank i, and provided wi I a set-screw, i, that screws into the upper g-e of the backboard, while J is a stopper, ich may be ad justed forward or back or ve ically by means of the slot j and screw j By combining the dog H n d gage I with the carriage and the stop-b J with the up right frame of a mortising-ml chine I can reg ulate the length of mortisesl ith great facility and accuracy. 3 The gage I is brought ag inst one side of the stop-bar J, when the chi l commences to operate, and the carriage ca ies itrtherefrom and brings up thereto the j g H, which has been previously set at the quired distance from gage. As soon as the sired length has been excised the dog H stri s the stop-bar J and the feed stops. 1 l

The chisel is reciprocated 0 do the cutting and rotated to reverse or c nge its relative position in the usual maune Having thus described nvention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a mortising-chisel and side-recessed post-carriage, of the gages G G or G G, the traveling-dog H, gage I, and stop-bar J, applied as and for the purpose described. I

2. The spring-pressed dog H h sliding in the perforated way e, the gage I, and the stopbar J, combined with the carriage of a mortising-machine, as herein shown, and for the purpose specified.

EUGENE HAMMOND.

Witnesses N. S. HALL, F. 0. Emma.

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