US497567A - Grinding-machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. B. DEEDS 8: W. MACK.

GRINDING MACHINE.

Patented May 16. 1893.

12v rim I026" ff. 3 wow-WW WITNESSES .zlltormg 1 was 5 951cm co, PNoYu-UT (No Model.) 2 Sheets--Sheet 2.

J. B. DEBDS,&IW. MACK.

' GRINDING MACHINE.

No. 497,567. Patented-May 16, 1 893.

mam 1mm WIZWESSES UNTTED STATES PATENT OFFICE.

JOHN B. DEEDS AND WILLIAM MACK, OF TERRE HAUTE, INDIANA.

GRINDING- MACHINE.

SPECIFICATION forming part of Letters Patent NO. 497,567, dated May 16, 1893.

Applicationfiled November 10, 1892. Serial No. 451,527- (No model.)

. of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This machine relates to machines for grin ding reaper knives, plow points, saw teeth and other similar cutting tools; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings: Figure 1 is a side View of the machine. Fig. 2 is a front View of the arm which carries the grindingrwheel. Fig. 3 is a section taken on the line at a; in Fig. 2. Fig. 4 is a plan view, from above, of the feeding devices.

A is the base plate of the machine.

B is a bracket secured to the base plate and provided with the two bearings 11 b.

O is the toothed driving wheel provided with a handle a. The hub a of the driving wheel runs loose upon the outer end of the shafzt 0, between the collar 0' and the bearing B is an arm which carries the grinding wheel. This arm is provided with a half bearing d at its upper end, and d is a clip provided with a similar half bearingand se-.

cured to the arm by the bolts D. The arm is clamped tightly to the shaft Obetween the bearings b b. The lower end of the arm D is forked and is provided with bearings e for the shaft E of the grinding wheel to run in. The grinding Wheel E is secured on the shaft E between the bearings e, and e is a toothed pinion secured on one end of the shaft E and gearing into the wheel C. The other end of the shaft E is provided withanut f and washers f so that another grinding wheel can be attached to it when required, for use when the wheel E cannot conveniently be used in g is screwed through a hole in the crossbar,

and the arm D rests against the front end of the rod when the grinding Wheel is in its lowest desired position.

H are guides secured to the base plate.

H is a slide which moves back and forth in the guides H. The slide H is provided with clamping devices h of approved cons ruction for securing the work to it.

I is a horizontal hand-lever pivoted on the pin 11 projecting from the base plate, and J are links pivotally connecting the lever Iwith the-rear end of the slide H.

The work is moved back and forth under the revolving grinding wheel by means of the hand-lever until the arm D touches the stop rod g. When the work is pushed under the grinding wheel, it raises the grinding wheel slightly, and the shaft 0 is turned in the bearings b b, but this motion of the shaft does not interfere with the grinding because the driving wheel 0 runs loose upon the end of the said shaft. Clamping the arm D to the shaft and carrying the shaft ends in bearings makes the grinding wheel run very true, and as the motion of the shaft in the bearings is very slight, the bearings do not become worn and allow the grinding wheel to have side play.

What we claim is 1. In a grinding machine, the combination, with a supporting bracket provided with a crossbar and with bearings b I), of the shaft 0 pivoted in the said bearings, the arm secured on the said shaft, the grinding-wheel shaft journaled in the free end of the said arm, the toothed pinion secured on the grinding-wheel shaft, the toothed driving-wheel journaled on the shaft 0' and gearing into the said pinion, and an adjustable stop-rod screwed into the said crossbar and operating to limit the downward motion of the said arm, substantially as set forth.

2. In a grinding machine, the combination, with the supporting bracket provided with a crossbar, of the arm, for carrying the grinding wheel, pivoted to the top of the said bracket, and the adj ustablo stop-rod f orliiniting the to motion of the said arm, said rod being provided with the thumb-piece for revolving it and being screwed through a hole in the said crossbar, substantially as set forth.

In testimony whereof We afiix our signatures in presence of two witnesses.

JOHN B. DEEDS. WILLIAM MACK.

Vitnesses:

EMMA A. SMITH, D. W. HENRY.

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