US 487446 A
Description (OCR text may contain errors)
T. MURPHY. KNIFE CLEANER.
No. 487,446. Patented Dec. e, 1892.
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UNITED STATES PATENT OFFICE.
THOMAS MURPHY, OF DEAL, ENGLAND.
SPECIFICATION forming part of Letters Patent No. 487,446, dated December 6, 1892. Application iiled .Tune 27, 1891. Serial No. 397.735. (No model.) Patented in England November 27, 1890l No. 19,811.
To all whom it may concern.-
Be it known that I, THOMAS MURPHY, a subject of the Queen of England, residing at 2 Adelaide Villas, Deal, in the county of Kent, England, have invented certain new and useful Improvements in Knife-Cleaners, (the same being patented in Great Britain by Letters Patent dated November 27, 1890, No. 19,3115) and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to apparatus for polishing knives and other similar articles; and it consists of certain novel features herein described and claimed.
Reference is had to the accompanying drawings, wherein the same parts are indicated by the same letters.
Figure l represents a perspective View of one form of my improved polishing device mounted upon a block. Fig. 2 represents a vertical longitudinal section of the same. Fig. 3 represents a cross-section of the same. Fig. 4. represents a cross-section of a modification of the device shown in Figs. 2 and 3, and Fig. 5 represents a modification of the spring-actuated devices for holding the polishing-pads.
A and A represent two flat shallow frames, which may or may not be closed at the sides by slats A2. (Shown in dotted lines in Fig. l.) In these frames are the pads B and B', filled with shifting or yielding material. This material is preferably dry white sand, free from impurities, and is inclosed in acanvas case b, and thelatter covered by a sleeve h', of leather or felt. Bird-shot or other finely-divided material that does not readily pack may be substituted for the sand, the prime requisite in all these substances being a substance of such a shifting nature that it will readily adapt itself to the various positions of the knife. The ends of vthe pads should preferably abut against a felt strip h2. (Shown in Figs. l and 2.) The open sides should preferably be kept from sagging outward by means of the adj nstable strips A2. (Shown in dotted lines in Fig. l.
The cushions B and B should be arranged so that they may be readily turned over or shifted end for end when they wear unevcnly;
also, so that the outer sleeve o may be readily slipped off and a new one slipped on. In order to furnish a certain amount of motion to the yielding pads, a number of bars or rods C are employed, resting on two strips of rubber D, and thus giving the effect of the elasticity of the rubber strips. This back to the pads, while increasing the efficiency of the device, is not absolutely necessary.
Fig. 4. shows a form of the device wherein the pads rest directly on the inclosing frame.
In order to keep a sufficient but not too great pressure on the pads, the two parts of the frame may be connected together with springs. The springs E are fastened to the sections A and connected together at their upper ends by the rod F, which passes over the lugs a, and so holds the opposite sections down.
In Fig. l the device is shown mounted on a block, to which either section of the frame A may be glued or otherwise secured. While the iiat sides of the knife are being polished the felt strips b2 clean the back of the knife, and the strips A2 press the cushions into such a shape as to clean in the shoulders k of the knife K.
Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-
l. In a knife-polishing device, the combination of the imperforated pads B B', containing a filling of finely-divided non-elastic material capable of a shifting action, with cases A A', containing the said pads, springs forcing the said frames together, and the strips A2, conining the said pads in the said frames, substantially as set forth.
2. In a knife-polishing device, the combination of a pad containing a lling of finely-divided non-elastic material capable of a shifting action with a frame containing said pad, a series of bars C behind the said pad, and two strips of rubber D between the said bars and the said frame, substantially as and for the purpose set forth.
In testimony whereof I aflix my signature in presence of two witnesses.