US100813A - Improvement in mortisingwmachines - Google Patents

Description

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'"JAMEs suiruor NEWARK, NEW JERSEY.

' Leners Parana. 1oo,s1f3"` daad March 15, 1870.

`IIPROVEMEINT IN MORTISING-MACHINEE.

` The Schedule referred to in these Letters Patent and making part of the same To all whom it may concernl v Be it known-that I, Janus Smm, of Newark, in the county [of Essex, and State of New Jersey, have invented a. new and useful Improvement in Mortising-Machine; and I do hereby declare that the follow-- ing is a full, clear, and `exact description thereof, which will enable others skilled in the art to malte and 'use the same, reference being had to the accompanying drawings forming part of this specification.

` This invention relates to mortising-machines, and

consists in certain improvement-s thereon which will machine.

Figure' 2 is a vertical section of Y "fig, 1, through the Similarletters'of reference indicate corresponding parts.

A is the plunger.

B is the chisel. 1l I C is a sleevewhich is connected with the head D, forming a swivel-joint for `the yreversal of the plunger. v

AE Arepresents the mort`ising-table. Fis a pulley, which-is constantly,revolved when `the machine isin operation yby means of the band G, which passes round the adjustable pulley H.

I is a sleevehthrough which the plunger passes with a feather-connection, so that the plunger with the chisel works through it, but revolves asthe chisel is' reversed.

`On the upper collar of thissleevell, and on the underside `of the pulley F, disks of leather or of other suitable material are fastened, as seen at J,

gThe. surfaces of theseA disks are constantly in ccnt-act with each other, and it is bythe friction pro duced by-such .contact that the chisel is reversed.

The friction being constant ris sufticient to reverse the chisel, or turn it one-half of a revolution whenever the sleeve I is released or set at liberty.

K K' represent lugs or pins on opposite sides of the lower collar of thesleevc I.

L is a stop-bar, which yslides horizontally toward the sleeve, and isforced in that direction with a constant pressure by means ofthe spring M.

rIhe end of this stop-,bar intercepts or prevents the reversal of the chisel while it is thus pressed forward, as the lugs K come incontact with' it.

N is a bellcrank-shaped lever, whose joint or f'ulcrum is at O. C

at T.

The upper end of this rod S passes through a slot in th'e lower arm of the bell-crank or lever N.

foot-lever S by an adjustable connection, as seen` U is a spring, which is attached` to this arm,`

which bears against `the rod S with a constant pressnre.

Y is a hook on the rod, which catches over the lower arm ofthe bell-crank N when the rod is raised, by the pressure of the foot on the treadles at the point W.

The table E is connected with the treadle at the point X, and its weight is sustained thereby, and serves to depress the back end of the treadle, and throw it into the position seen inthe drawing, whenever the pressure of the foot is removed.

Y is an adjustable screw in the top end of the rod S, the end of which works in contact with the inclined plane q. f y

The/spring U constantly presses ythe rod S and screw Y toward the inclined plane.

When the machine is in operation, the rod SV is raised by the pressure of the foot on the treadle, so that the hook V is passed up above the slot inthe arm of the bell-cran p f This does not alter the position ot' the stop-bar L,

which holds the chisel in" position while the pressure of the foot continues. A When it is necessary to reverse ythe chisel the pressure is removed, the weight of the table forces down the back end of the treadle, which draws down therod S.

As this rod descends, the hook V will catch (for i which, it wil-l be remembered, is constantly revolving.

As the rod S, drops, the hook V is thrown (by the end of the screwY, which descends in contact with the inclined plane Q) back `into the slot, so that-the slide Lk is` acted uponv but an' instant, but still the chisel is allowed to make halfo'f a revolution or be reversed.

The lug k on the opposite side catches the end of the bar L, and, holds the chisel until itv is necessary to reverse it again, when the same operation is repeated.

The. bed `E is made adjustable in height, to suit d the depth of the cut of chisel, by means of thev nuts Z Z on the connecting-rod, as seenin the drawing.

Having thus described my invention, v I claim as new and desire to secure by Letters Patent- 1. The combinationof a constantly-revolving pulley, F, with friction-disks J J and sleeve I, to give pivoted to the bar S with the treadle W,to adjust a, semi-rotation to the tool-stock, and reverse the the throw of bar S, as set forth.

chisel at the. times and in the manner specified. The above speciiication of my invention signed-by 2. The combination of a slotted bell-crank lever, me this 13th day of December', 1869.

N, having inclined surface q thereon, with notched JAMES SKIPP.

and pivoted spring bar S uv and pin g/,to operate the f Witnesses:

spring slide L M in the manner described. GEO. W. MAB'EE,

3. The combination of the adjustable connection T,` ALEX. F. ROBERTS.

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