US1148462A - Machine for sharpening razors and other edge-tools. - Google Patents

Description

F. H. RYAN.

MACHINE FOR SHARPENING RAZORS AND OTHER EDGE TOOLS.

APPHCATION FILED FEB. 28. 19:4.

Patented July 27, 1915.

2 SHEETS -SHEET I.

lllllllllllllllllllll lll F. H. RYAN.

MACHINE FOR SHARPENING RAZORS AND OTHER EDGE TOOLS.

APPLICATION FILED FEB. 28. 19M.

Patented July 27,

2 SHEETS-SHEET finance.

FREDERICK H. RYAN, OF BOSTON, MASSACHUSETTS.

MACHINE FOR SHARPENING- RAZORS AND OTI-IER EDGE-TOOLS.

Specification of Letters Patent.

Patented July 2'7, 1915.

Application filed February 28, 1914. Serial N 0. 821,666.

To all whom it may concern: 4

lie it known that I, FREDERICK H. RYAN, a subject of George V, King of Great Britain and Ireland, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Machines for Sharpening Razors and other Edge-Tools, of which the following is a specification.

I have shown my invention embodied in a machine for sharpening a razor blade of the well known Gillette construction, but it may be embodied in other forms depending upon the blade or tool which is to be sharpened by it. I have also shown my machine arranged with a hone or stone, but it may be used with other sharpening means.

My invention will be understood by reference to the drawings, in which Figure 1 is a plan, and Fig. 2 a side elevation of a device embodying my invention; Fig. 3 being-a section on line 3-3 of Fig. 1, and Fig. 4 being a cross section on line 44 of Fig. 1. p

In its preferred form my invention comprises a bed having a bottom plate A and two side walls A A Within this bed as shown is mounted a hone B or-the like of any suitable material, the whole being supported upon suitable feet C which are preferably made of rubber and are attached to the under side of the plate A of the frame by screws 0. Each side wall A A preferably extends slightly above the upper surface of the hone B and is slotted as at a to receive the axle F of the blade holder. To turn this shaft it carries friction wheels of some character which run upon suitable runways, one located on each side of the bed. As shown these runways are in the form of racks D, one attached to each of the side walls A A the tops of the teeth of each being approximately on the level of the bottom wall of the adjacent slot a, and the friction wheels are in the form of pinions G.

The blade holder comprises a handle E which is forked, having two arms 6; the outer end of each arm is perforated to receive the ends of the axle F. This axle thus extends across the device and projects through the slots (1 in the side walls A, A. Just outside the walls A A the axle is reduced in diameter so that shoulders f are formed and on. each reduced portion f of the axle is carried. a pinion G which engas one of the racks D. These pinione are adapted to turn freely on the axle F except as they are held in frictional contact with the shoulders f by means of springs g and set nuts 7 By means of these set nuts this frictional contact with the shoulders f may be adjusted.

The axle F is perforated as at h to receive the'shank 71. of the blade clamp. The blade clamp comprises two members,a base plate or member H to which the shank k is permanently attached and from which project pins 71?, and an upper plate H having key hole slots or openings it.

It is well known that the Gillette blade has openings in it which cotiperate with pins in the razor-holder to center the blade J in proper position in the holder. In the embodiment of my machine shown the pins h are located with reference to these openings so that the blade J will be properly centered on the blade clamp. Each pin has a head which is slightly larger than its body and the pins project above the blade when it is in place sufficiently to allow the top plate II to slide under the heads. To clamp the blade in the clamp the larger portions of the key-hole slots or openings 72 in the top plate H are caused to register with the pins k and the plate is dropped into position, the heads of the pins projecting through the openings, after which the top plate I-I may be pulled laterally to the right by the upwardly-projecting ear or thumb piece 71. the narrow parts of the slots or openings b will be overlapped slightly by the heads of the pins 11, thusretaining the top plate H in clamping position.

The shank h of the blade clamp is threaded so that it may be adjusted in and out in the opening it in the axle F and this threaded shank affords a pivotal connection of the blade clamp with the bar or axle F, so that the said blade clamp may turn slightly and thus automatically adjust itself to any irregularities onthe surface of the hone. It is extremely diflicult to grind a stone absolutely level however smooth it may be, and this construction allows the blade during the honing operation to adjust itself to these slight differences of level. To enable the blade clamp to be adjusted in or out relative to the bar or axle F, by virtue of the threaded shank 72. to compensate for diflerent widths of blades, it is necessary to raise the said blade clamp from the hone or body B, havin the sharpening surfaces, so that the said blade clamp may be turned manually to effect the desired adjustment. But in the use ofthe device the blade clamp will vibrate with the said bar or axle F without turning far enough to disturb such adjustment.

The pinions G serve two purposes. They serve with the'axle and the upper wall of tion of movement, the pinions G upon re-' 3 versing their direction of movement by reasome type.

'son of their frictional contact with the axle F. throw the axle over so that the blade reverses its direction of movement and the opposite side of the edge of the blade is ground. When the blade strikes the hone,

however, the frictional relation between the pinions and the ends of the shaft allows the pinions to rotate, while the axle is held stationary by the engagement of the blade with the hone. By allowing a little play between thetop edge of the slots 0. and the top of the axle itis possible to adjust the "axle so that the pinions do not run in teeth exactly opposite each other, andthus perhaps grind the edge of the blade at a slight angle. In certain cases this may be desirable. In'any event, as is usual when a hone is used, the

blade is drawn in the direction of its edge as shown by the arrows in the drawings, and it is for this reason that my invention is especially adapted for use with a. hone of In use therefore the blade is placed upon the under portion H of the clamp in such a way that the pins k project through the openings in the blade. The

plate H is then slipped over the pins 72,

and by means of the ear 7:. the plate is pushed to the right (see Fig. 1) so that the narrow portions of the openings it run un- ;holding the machine during the grinding operation a handle K may be used, this being attached to one of the walls A.

The details of construction of my device may be changed somewhat, the important feature thereof being the adjustable relation of the blade clamp to the shaft, whereby the to the irregularities of the surface of the stone and also may be adjusted in and out from the shaft to compensate for the width of the blade in cases where the blade has been previously ground, and hence has lost a portion of its width.

What I claim as my invention is 2- In a blade sharpener, the combination with a frame adapted to support a sharpening body, of a blade holder comprising a bar or axle extending across the said body, and a blade clamp having a screw-threaded shank by which it is pivotally attached to said bar or axle so that it may turn on an axis at right angles to the length of said bar or axle and thus be adapted to conform automatically to unevennesses of the surface of said sharpeningbody and which screwthreaded shank permits of adjustment of the said blade clamp in or out relative to the said bar or axle, to compensate for different widths of blades.

FREDERICK H. RYAN.

Witnesses:

GERY O. G. BowEN, M. E. FLAHERTY.

65' clamp may adjust itself to a certain extent

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