Invention Razor-Stropping Device
Filed Saturday, 7th July 1906
Published Tuesday, 23rd July 1907
Inventor William Sharples
Language EnglishCPC Classification:
Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
Performing Operations; Transporting
Tools For Grinding, Buffing, Or Sharpening
Hand tools or other devices for non-rotary grinding, polishing, or stropping
Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
For a full resolution version of the images click here
A PDF version of the original patent can be found here.
Parts not referenced in the text: None
Parts not referenced in the images: None
To all whom it may concern:
Be it known that I, William Sharples, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Razor-Stropping Devices, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.
This invention relates to improvements in razor-stropping devices in which a flexible razor-strop is operated by hand over suitable rollers to transmit oscillatory motion to a razor holder to move the blade alternately against opposite sides of the strop as it is drawn back and forth over the rollers.
My object is to increase the working efficiency of this class of devices by increasing and maintaining a uniform lap of the razor-strop upon the roller which actuates the razor holder so that any variation in the position of the hands while drawing the razor-strop over the roller does not affect the angle of the portions of the strop between which the razor-holder oscillates.
Another object is to locate the razor holder so as to support the razor with the edge of the blade uppermost thereby utilizing the weight of the razor to aid in its retention in the holder, and reducing the liability of accidental displacement, or disengagement of the blade with the clamp as the strop is drawn against the blade towards its edge.
A further object is to reduce the number of parts and cost of the frame by making it in one piece and interlocking the ends to prevent spreading of the sides and to enable the rollers to be quickly and easily inserted and removed to and from their operative positions.
A still further object is to connect the razor holder with its actuating roller by sliding interlocking connections, thereby avoiding the use of toothed gears and consequent “back-lash” or lost motion, which invariably causes more or less mutilation of the strop by the razor blade.
In the drawings—
The main supporting frame is made of a single piece of sheet metal, bent in a rectangular form, as best seen in
One of the sides or ends of the frame, as —
The angle formed by the portions of the strop between the rollers
What I claim:
1. In a razor stropping machine, of the class described, a supporting frame consisting of a single piece of sheet metal bent into rectangular form and having its ends interlocked with each other to prevent spreading of the sides, an oscillatory razor holder journaled in the frame, a roller also journaled in the frame, sliding interlocking connections between the roller and holder and a razor-strop engaging the roller and adapted to be drawn back and forth for imparting rotary motion to said roller.
2. In a razor-stropping device, a one-piece frame of sheet metal bent into a rectangular form and having its ends interlocked with each other, a roller centrally journaled in the frame near the bottom, additional rollers journaled in the frame near the top at opposite sides of the vertical plane of the first named roller, a razor-strop passing around said rollers, a razor holder above the first named roller and between the portions of the strop connecting said roller, and means actuated by the first named roller for imparting oscillatory movement to the razor holder.
3. In a razor stropping device, a supporting frame consisting of a single piece of sheet metal bent into rectangular form and having its ends meeting at the bottom substantially midway between the sides, the ends of said piece having interlocking members to prevent spreading of the sides, means to hold said ends in the same plane, a roller journaled in the opposite sides of the frame near the bottom, additional rollers journaled in the frame near the top, the rock-shaft also journaled in the sides of the frame between the lower roller and upper rollers, a strop passed under the lower roller and over the upper rollers, and having its ends hanging down from the outer sides of the upper rollers, a razor holder secured to the rock-shaft and provided with spring jaws opening at the top for receiving and retaining the razor, and means for transmitting motion from the lower roller to the rock-shaft to oscillate the latter as the strop is moved longitudinally.
In witness whereof I have hereunto set my hand this 3rd day of July, 1906.
Howard P. Denison,
Mildred M. Nott.