US645382A

US645382A - Grinding-machine.

Info

Publication number: US645382A
Application number: US73633799A
Authority: US
Inventors: Samuel Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-11-09
Filing date: 1899-11-09
Publication date: 1900-03-13
Anticipated expiration: 1917-03-13

Description

No. 645,382. Patented Mar. I3, I900. 8. BROWN.

GRINDING MACHINE.

(Applied-flan filed Nov. 9, 1899.)

2 Sheets-Sheet I,

(No Modal.)

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No. 645.382. Patented Mar. l3, I900. s. snow".

GRINDING MACHINE.

Application filed Nov. 9, 1899.) (No Modal.) 2 Sheets-Shoal 2.

absolutely dull that bad work results.

NITED STATES PATENT OFFICE.

SAMUEL BROWN, OF PHILADELPHIA, PENNSYLVANIA.

GRINDING-.MACHINE.

SPEOTFICATION forming part of Letters Patent No. 645,382, dated March 13, 1900.

Application filed November 9, 1899. Serial No. 736,337. (No model.)

To aZZ whom it may concern:

Be it known that I, SAMUEL BROWN, of the city and county of Philadelphia, in the State of Pennsylvania, have invented an Improve: ment in Grinding-Machines, of which the following is a specification.

My invention has reference to portable grinding-machines and it consists of certain improvements set out in the following specification and shown in the accompanying drawings, whichform a part thereof.

My invention has particular reference to a construction of machine adapted for sharpening blades of paper-cutting machines, and is so made that the blades may be sharpened without removing them from the machine. The advantage of being able to sharpen the beveled cutter-blades of paper-cutting and similar machines without dismantling them is threefold-namely, great loss of time is avoided, the machine is not required to be put into an inoperative condition, and thus impede the progress of the work, and the blade may be kept constantly in a very sharp condition, and thereby insure the paper-cutting machine always being in a form to do good work. Where a machine has to be'dismantled and the blade taken 06 and sharpened, it is usually the case that the sharpening is not resorted to until the machine becomes so This trouble is entirely avoided by use of my improved knife sharpening device, as the same may be quickly and easily employed to sharpen the blade of the paper-cuttingmachinethe moment there is any indication that it requires attention. There is no loss of time beyond a few minutes at most. For this reason the blades of such machines will be constantly kept in the best possible condition for the work for which they are designed.

In carrying out my invention I provide a suitable frame adapted to be readily moved over the surface of the table of the paper-cutting machine under the application of handpressure, and to this frame I adapt one or more rotary grinding wheels or disks, preferably of emery, and impart thereto a rotation by a suitable crank or hand-power device. I furthermore prefer to arrange the grinding wheels or disks in a frame in such a manner that they may be adjusted to change the obliquity of their grinding-surface to suit the obliquity of the 'bevels on different cuttingblades.

Myimproveinents will be better understood by reference to the accompanying drawings, in which-- Figure 1 is a side elevation of my improved grinding-machine. Fig. 2 is a sectional elevationof same on line 2 2 of Fig. Fig. 3 is a sectional elevation of same on line 3 3 of Fig. 2, and Fig. 4 is a sectional plan view of same on line 4. 4..

A is the main frame and is supported in'an upright position from a pair of base-plates B B, to which it is hinged by the transverse bolts 0. The base-plates B are provided on the under side with ball-casters b, which are held in position by suitable retaining-plates B. By this means the machine is supported in a suitable manner upon four balls and may be moved in any manner desired under the pressure of the hand, permitting the smallest adjustments which might be necessary and also enabling the machine to be freely moved over the table of the paper-cutting machine to follow the edge of the cutting-blade which is being ground. Pivoted also upon the bolts 0 is a frame D, extending obliquely forward and provided with three bearings for receiving the shafts E E E. The shafts E E are provided with heads (2, upon which are fitted the grinding disks or cups F, which are preferably clamped by means of retaining-plates F and screwsf. I do not confine myself to any particular shape of grinding wheels or disks, but prefer the construction shown, as they are found in practice to be excellently adapted for the purpose for which the invention is intended. Ball-bearings G are interposed between the heads 6 and the fiat surface d of the frame D. These ball-bearings G are received in V-shaped annular grooves and receive the thrust put upon the grinding-disks by the cutter-blades. The rear ends of the shafts E are fitted with spur-gears M, which are held to the shafts by means of set-screws S. Journaled upon the intermediate shaft Eand meshing with the two spurwheels M M is an intermediate pinion L, which is preferably formed integral with the driving-pinion K. The driving-pinion K meshes with a gear J, secured to the rearwardly-extending shaft H, terminating in a crank-handle 7a. The hub of the gear J is 2 erases journaled in the frame A and in a rear frame I, as clearly shown in Fig. 2, though I do not confine myself to this means of journaling it. The gears J and K are preferably somewhat conical or beveled to permit the more ready adjustment of the frame D about 0 as accuter while maintaining the two gears J and K in mesh.

The frame D is provided with a transverse pin D, through which an adj usting-screw D passes, the upper end of the adj usting-sorew being journaled in a transverse block D loosely journaled in the upper end of the frame A. The extreme upper end of the shaft D is fitted with a milled head D whereby to turn it for properly adjusting the frame D upward or downward to change the obliquity of the grinding-face of the emery-disks F to suit the obliquity of the cutting edge of the knife R of the paper-cutter, as indicated in Fig. l.

T is an upper handle structure bolted to the main frame A and provides means for holding the tool by one handle while rotating the crank with the other. By this means the tool may be shifted along the table, adjusting itself to the knife, while the crank h is being rotated.

In some cases where it is desirable only to rotate one of the grinding-disksas, for instance, where the extreme end of the cuttingblade is being ground the set-screw S of the shaft of the other grinding-disks may be loosened, so that the rotation of the crank will only cause one of the grinding-disks to rotate, while the other acts' as a guide.

It is evident that, if desired, the frame A may be rigid with the foot-plates B 3 but by making it adjustable, as shown, it is evident that a greater possible capacity of adjustment can be given to the disks F than if the screw D alone were relied upon for moving the frame D upon the foot-plates B. By the construction shown the main frame A maybe adjusted backward or forward from a vertical position and carry with it the frame D and then secure any additional adjustment of the frameD by means of the adjusting-screw D as before.

While I prefer the construction shown as being well adapted for the purpose of the invention, I do not confine myself to the minor details, as these maybe varied in many Ways.

without departing from the principles of the invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is- 1. Ina portable grinding-machine, the combination of a main frame provided with universally-movable supporting-bearings therefor, one or more obliquely-arranged grindingdisks journaled in supports carried by said main frame, and hand-operating means for rotating the said disks.

2. In a portable grindingmachine, the combination of a main frame provided with universally-movable supporting-bearings therefor, one or more obliquely-arranged grinding disks journaled in adjustable supports carried by said main frame, means for adjusting the adjustable supports relatively to the main frame, and hand-operated means for rotating the said disks.

3. In a portable grinding-machine, the combination of a movable main frame, an adjustable frame pivoted to the main frame, means to adjust the adjustable frame upon the main frame, one or more grinding-disks journaled in the adjustable frame, and hand-power de vices for rotating said disks.

4. In a portable grinding-machine, the com bination of a movable main frame, an adjustable frame pivoted to the main frame, means to adjust the adjustable frame upon the main frame, one or more grinding-disks journaled in the adjustable frame, hand-power devices forrrotating said disks journaled in the main frame, and gearing between the hand-power devices on the main frame and the grindingdisks on the adjustable frame.

5. In a portable grinding machine, the combination of a main frame provided with ad- 3' ustable supporting base-plates or feet,- one or more obliquely-arranged grinding-disks carried by and adjustable with the main frame upon the base-plates or feet, and means on the main frame for rotating the grinding-disks in all portions of adjustment relatively to the base-plates or feet. 1

6. In a portable grinding-machine, the combination of base-plates or feet, a movable main frame pivoted to the base-plates, an ad- 'justablc frame pivoted relatively to the main frame, means to adjust the adjustable frame relatively to the main frame connecting the said frames, one or more grinding-disks j ournaled in the adjustablev frame, hand-power devicesfor rotating said disks.

7. In a portable grinding-machine, the combination of a main frame provided with universally-movable supporting-bearings therefor and also provided with handles wherewith to move it, one or more obliquely-arranged grinding-disks journaled in supports carried by said main frame, means to adjust the grinding-disks, and hand-operated means for rotatingthe saiddisks.

8. In a portable grinding-machine, the combination of a main frame having a supporting base structure, a frame pivoted relatively to the main frame, one or more grinding-disks journaled in the pivoted frame, a crank or main frame, gearing between the crank and the grinding-disks, and an adj usting-screw for adjusting the pivoted frame relatively to the main frame without interfering with the gearing.

In testimony of which invention I have hereunto set my hand.

SAMUEL BROWN.

Witnesses:

ERNEs'r HOWARD HUNTER, J. W. KENWORTHY.