US256337A

US256337A - laweenoe

Info

Publication number: US256337A
Authority: US
Publication date: 1882-04-11
Anticipated expiration: 1899-04-11

Description

i' (No Model.) l W. E. LAWRENCE.

Woon BORING MACHINE. No. 256337. y Patented Apr. 11, 1882.

Y wffww@ UNrTED STATES PATENT Orme WILLIAM E. LAVVRENGE, OF NEW YORK, N. Ya

`wooo-130mm; MACHINE.

SPECIFICATION forming perf ef Lettere Patent Ne. 256,337, dated April 11, 1882.

' Application filed J annar'y 27, 1882. (No model.)

To all whom t't muy concern:

Be it known that l, WILLIAM E. LAWRENCE,

a citizen ot' the United States, and a resident of the city, county, and State ot' New York, have invented certain Improvementsin Wood- Boring Machines, of which the following is a specication.

My invention relates to that class of woodboring machines in which an auger is carried by a traveling frame, and the latter is raised by meansot' a rack gearing with a pinion on the driving-shaft; and my invention has for its object to simplify the construction and increase the efficiency ot' the machine.

In the drawings, Figure l is a sectional elevation, and Fig. 2 a front elevation, of a boring machine with my improvements.

The base A, sido pieces,B B', sliding frame l C, boring-bar D, and driving-shaft E, both turning in bearings of said frame, and the bevelgears a a. on the bar and shaft, are all similar to thosein ordinary machines of this kind,and need not be here further described.

Upon the shaft is fixed a toothed pinion, b, and on the inside ofthe side pieceB, opposite said pinion, is arranged a raclbar, F, having at the back edge three lugs, d d'f, the center lug, f, being perforatedto receive an eccentric pin, e, upon a cylinder, G, turning in a hole inthe side piece, and provided at the outer end with a crank-handle, g, whereby it may be turned so as to carry .the bar to or from the pinion b.

It will be seen that the motion `im parted to the bar is in a curve, for which reason I makethe guideslots t' in the lugs d d' also curved, said slots receiving stationary pins n, project ing from the side piece. By this construction the bar is locked in whichever position it is adjusted. Thus when turned to the position 4o shown in Fig. 1 its teeth engage With those of the pinion b, andthe boring-bar frame is raised by turning the driving-shaft, and the pressure upon the bar in any direction cannot force it back and away from contact with the pinion, owing to the peculiar form of the lock-slots.

. By a single movementof the hand the handle'g may be turned to the position shown in Adotted lines, when the `bar will be carried away from the pinion, and will be locked se- 5o curely in this position until the handle-is again swung forward.

It will be seen that when the bar is carried back it is so Far removed at all points from the pinion b that it cannot engage therewith until the rock'cylinder is again turned.

I claim- The combination, in a boring-machine, of the sliding frame, carrying the geared boringbar, and driving-shaft provided with a fixed 6o pinion, b, and a rack-bar, F, having curved slots t', receiving pins n., projecting from the side piece, and a rocking cylinder, Gr, yprovided with a handle, and with a pin, e, fitting a socket in the rack-bar, substantially as set forth.

In testimony whereof I have signed my name to this specification-in the presence oftwo subscribing witnesses.

WILLIAM E. LAWRENCE.

Witnesses:

Jos. A. WHITMORE, SAMUEL KILPATRIGK.