US2472311A - Razor sharpener - Google Patents

Description

June 1949- T. M. PAGE 2,472,311

RAZOR SHARPENER Filed March 28, 1947 IN V EN TOR.

' Zzomas/W. Faye Patented June 7, 1949 UNITED STATES RAZOR. SHARBEN LK' Thomas M. Page, Detroit, Mich.

A p pli cationlvl i ch 28, 1947, Se 'ialNgn 737,764,

9 Claims.

is o ha peiionwher n he z h e o s tewi l io oeaf oiioe e home. u r net.-

, y QQXl Z .P? -I-,

he obieot oi, he nv ntio o io aii l o lsh i iio wherein t e an le o h a relative to the ho Q is'autq natipally c ntr 0 11ed.

ni l iith r. obiootisto leit v dou u ooin notio is oithe ezoidve h nto. l m n wi a oth i'i'i Manner. ob e t he inven io se on ov o ab t ng. app ratus hor iii a rmanent e net otiteott or itit i lerv oii iol d. e s e 1 E r h r oloioots. atto s m tose i he rendr ewsow oi ty razo l de,- a'oroesa n ave surface of a hone and simultaneously holds itin 2,- ow ndo eoosi iron; thofla eos, zl lld' '3: are or ed nwardly xten in sho de s 2t n i Aho e 2 xtel idsg otw n hei n l i sv and! l nd as t i 1s.; est n. upon hese hou e e a ho o em o i ie l oii or e i n. m mber,

hi l h l lt s. I ond 1 1 .a t' enoioomombors i. -X 111 apnaiton romtheu o low ie es ri ti ken. n, onnection. w he. appended drawing, in which:

R le ao isne tiv v ewr a zors am mb ineiioiiivo tioii;

F "sqa plan nview of the same;

g, ,3 is a,v ertiqal s e ctipnal View of the sal ne, taken on the line 33'of Fig. 2;

F i o ho izont l ooo i p pit ome ta e nthfolliiie, m loif fi;'

zetech ntiio o oiiiioain ie rawin inc he oiitioii h s anolo o J ther mbo i nt and li-l oiii i ro t o o or a ie l utin a ou w y eli jo t. i oibo nders o d. e nhra oolo y, or, QSIKiiE PlQ Y I QIQY .her in s, or. the urp se,

oil-t seoiioti n and t o z imitotian iit riiodr ianeo des at d, 12 and I3, reeezot ye li iti s niooe s tond. ma -b orme o wood or other suitable material, and are c0n v nect egl by ngean s oi bolts l6 and I1, which pass through suitable apertures in the end pieces.

5 is: s o t i ell owisimile o ,FT v ut 6fis ,a,sin1 ila1 view oia fupther mqdifiegl 121 wi l? isie totood, hat, h nvent on is.

de oe; own: i s-.17 om rise v i iie o id e-tee I t n i o ded.

to, reta n h parts e dly g ki irL s emb latio fi- As willl eseeninl e h per. u oe' o e honeisoi oncavef lindr lsliape' o h doubl 5: am; a ety ra r. blad dioatod, n otted. io$.,at;, ma rest hereon with. nly t oees i. ontaotq he, hone.

h se ed es on ao inen hes hone. at a..1or do mined angle depending upon the radius of curva; turpo of the hone, If desired the un de surface' i. hehoiie may oi oimod, wi a, e ies of, l n t d n l .eroovos.-,

ide 8 oi rooahl moun edii he rame below h onelli'oiid s o m si ithoR- o tei lowa dlx xte din fla es .0L and a], ew niwh o i mounted fn rman nt ma n i m n t 3.4 s, preie abln f, Alnioo mila mpos tion andislo i i'oio t v t le ieth to x t a c siderab e. magne ic flux. pon a. magnet-- ll n r o lei-obi ot iio as. the blade 5; po ioned attsomedistanoo o h n t- The polarization f themagnetis suoh that the ma netic flux-flows tran rselsaorFigi so t a ifthe north pole.0f thelmag-net is at the leftnof that figure, the south poleds at. theright, In orde'rl to lirfnit the re cip rocatory" movement. of, the slide, a, pair of stop, pins 35 and, 31 are ou d in he. .eii .i.eoesn vfl nd II nl n io w nwa ly in ioh monnen h t her ex rem of 1 the n ovement of theslidethese. pins will con-- o t hoh an s M1?v Asw l e n, Ei 4, h ma ne i i i tly h r e n t n the, I?emaintier.;of,thesligle 28 to allow space for the p rojeeting flends oi these pins. The slide, 2,8 is,p ei. rolo orm d, with; ter l r c i n.

4.0!," of, generally cylindrieal shape, which used. as a strap for completing; the sharpening;

t ltlls nihald and, pla e the umb nd. ore

i er f he.., .er. osnooti ly a n o o jectipn Mi and the 'oppositeedge of the slide, and reoiprqpates theslidei It is possible to, reciprocate thesliderapidly'in this manner so that; the

operation can be rapidly aopon plishe'gi. As-the slide with its magnet isiegiizirociatedjrom oneextreme position tothe other; it draws the-blade 24 along with it over the face of the hone, with the result that both edges of the blade are brought into frictional contact with the hone under a pressure which is substantially constant, being a function of the strength of the magnetic field and of the magnetic properties of the blade. As soon as the blade is placed upon the hone, the blade itself becomes magnetized, with a polarity opposite to that of the magnet. The blade is therefore constrained to at all times to move to a position wherein it forms part of a path for the lines of magnetic flux, and it is al o pressed downwardly against the hone with a pressure which is uniform and which may be an optimum pressure if the instrument is properly designed with reference to the strength of the ma net and other factors. Another effect which the magnet has upon the blade is that because of the blade being magnetized, and because of the tendency of magnetically permeable material such as steel to move to such position as to minimize the length of the lines of magnetic force, the fine serrations at the edges of the blade are constrained to move into positions which lie in the plane of the blade, and thereby to align themselves with each other. This effect is facilitated by the agitation to which the blade is subjected during honing, and tends to produce an edge of unusually excellent cutting qualities. When the slide has reached the end of its stroke, inertia tends to cause the blade to continue its movement, but the force exerted by the magnet is sufficient to arrest it at either of the extreme positions shown in dotted lines in Fig. 2.

In the form of the invention shown in Figs. 1-4, the bolts l6 and I! are preferably formed of steel or other magnetically permeable material, which forms part of the path of the mag netic fiux and thereby increases the strength of the magnetic fiux flowing through the blade. This increases the magnetization of the blade, and its tendency to follow the movement of the slide. In order to further increase this effect, the bolts may be formed of rectangular cross section as indicated at 66 and d? in Fig. 5. The bolts in this figure are fitted closely against the edges of the hone, so as to form the shortest possible path for the magnetic flux. For the purpose of further increasing the magnetization, the hone, which is indicated at 48 in this figure, may be made relatively thin. The magnet, indicated at 50, is reciprocably mounted in a stationary tray or container 52, which comprises a bottom and end walls, all of which may be formed of plastic or other suitable material. The magnet is urged in one direction by a compression spring 5 which is seated in a recess formed in one of the side walls. For moving it in the opposite direction, a plunger 56 is reciprocably mounted in a bore in the opposite side wall, to be alternately actuated and released to cause the magnet, and thereby the blade (not shown in this figure) to be reciprocated relative to the hone 5.

In the further modified form of the invention shown in Fig. 6, the sharpener is made up of end pieces 6!], which are similar to the end pieces I! and I2 in Fig. 1, and are joined together by a bottom plate 62. Side walls 64, of magnetically permeable material, support the hone 66 at a distance above the bottom plate 62 and thereby form a slideway along which the magnet 68 is freely reciprocable. The parts 69, 62, 64 and 66 are secured together by adhesive or other suitable means. The magnet is reciprocated by simply reciprocating the sharpener, causing the magnet to move by inertia from its one extreme position to the other and thereby move the blade over the hone.

Although the invention has been described with reference to certain particular embodiments thereof, it may be embodied in other forms within the skill of artisans in this art, and is not limited except in accordance with the terms of the following claims.

I claim:

1. A razor sharpener comprising a support, a non-magnetic element having a sharpening surface fixedly related to said support, and a magnet mounted in said support for reciprocation in a plane generally parallel to and in proximity to said sharpening surface and capable of moving a magnetically permeable blade over said sharpening surface.

2. A razor sharpener comprising a frame, a hone fixedly mounted in said frame and having opposed longitudinal surfaces, one of said sur faces being of concave cylindrical form, the other of said surfaces being provided with longitudinal grooves, a slide reciprocably mounted adjacent said other surface, a permanent magnet carried by said slide and having its magnetic axis perpendicular to and spaced from the axis of the cylindrical surface, and means for limiting the extent of reciprocating movement of said slide.

3. The invention defined in claim 2, comprising in addition a pair of magnetically permeable members extending longitudinally of the hone adjacent the edges of said surfaces.

4. A razor sharpener comprising a frame, a sharpening member fixedly mounted in said frame and having opposite longitudinal surfaces one of which is of concave cylindrical form, and a magnet mounted in said frame for reciprocation in a direction perpendicular to the axis of said one surface, said magnet having its magnetic axis extending in the direction of such reciprocation.

5. The invention defined in claim 4, comprising in addition a pair of magnetically permeable members of rectangular cross section extending longitudinally of the sharpening member closely adjacent the edges of said surfaces.

6. The invention defined in claim 4, comprising in addition yielding means urging the magnet in one direction along said axis, and manual means for moving the magnet in the opposite direction.

'7. The invention defined in claim 4, wherein said magnet is freely movable in either direction along said axis by reciprocation of the sharpener.

8. A razor sharpener comprising a member having a surface designed to sharpen a razor blade reciprocated thereon, frame means forming a slideway generally parallel to said surface, and a magnet reciprocably mounted in said slideway with its magnetic axis parallel to said surface and capable of moving a magnetically permeable razor blade resting on said surface.

9. A razor sharpener comprising a member having a surface of concave cylindrical form designed to sharpen a razor blade reciprocated thereon, means including said member forming an enclosed slideway adjacent and generally parallel to said surface, and a magnet reciprocably mounted in said slideway with its magnetic axis perpendicular to the axis of said surface and capable of moving a magnetically permeable razor blade over said surface.

THOMAS M. PAGE.

(References on following page) REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Smith Jan. 17, 1899 Number

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