US1874740A - Safety razor blade stropper - Google Patents

Description

Aug. 30, 1932. c, R E 1,874,740

SAFETY RAZOR BLADE S'IROPPER 7 Filed Sept, 25, 1931 MW WV gardwfl $6620 I Patented Aug. 30, 1932 eonnon oqennnn, or nmenimjuessncnusnrrs 1 I seem? nhzon nnlinns'rnorrnn,

A pplic at i on filed Septen1h er,. 23, 1931.] Serial No. 564,517.

The object of this invention is to provide a blade stropper adapted to be grasped" by a hand and be guided by one of the edges of a strop, during the operation of stropping a blade, the stropper being providedwith a pair of jaws for clamping a blade'so that it cannot be flexed by pressurelofitsf cutting edge against a strop, andwithanother pair of jaws for clamping a bladeadjun'ct, the two 10 pairs of jaws firmly holding the bladeandad junct in an inclined or oblique position',fsjo that whenthe stropper is guided by astrop edge, the blade edge toflbe stropped extends obliquely from the strop edge, iaj position which is well known to be advantageous.

Of the accompanying drawing forming a part ofthis specification i j Figure 1 is a side view of astropper embodying the invention, parts being shown in j o p v .c

section. I 4 i j p r H Figure 2 shows in perspective and assembled, the rod sections shown byjFigure 1; Figure 3 shows in perspectivethesections of the rod separated from each' other.

Figure 4 is a perspective view ofthe element of the stropper,

v Figure 5 is a perspective view of the nut shownbyFigurel; i ,1

Figure 6 is an edge view'ofthe bladeadjunot-shown by Figure 1. r. 3 Fi re is a perspective view of said adjunct. a 1 .1 Figure 8 is an enlarged sectionon line 8-78 of Figure 1; Q L; I Figure 9 is a side view and F lgure 10 an end View of a blade and a blade adjunct fixed thereon, portions of the stropper being shown by dotted lines in FigureQ.

Figure 11 is an enlarged sectionfionj line 7 V Y may be clamped betweenthe jaws 17. o A separable" adjunct is shown by Figures l111 of Figure 1; t

Figure 12 isga View s ilar to showing the gripping jaws when not under;

gripping pressure. g V V l i The same reference characters indicate the same parts in all of the figures.

The stropper comprises two independent; oblong rod sections having flat inner sides and semicylindricalouter sides 12." Sa d sec tions eollectivelyiorm a cylindrical rod and 0 have outer end faces 14.

The fl'atinner sides are interrupted by oblique slotshaving bottoms 1 7 and edges18. Saidsl'ots are located near the outer ends of the sections, so that the flatsides include elo'n-f gated inner end portions 16,, and, relatively shortfbl'ade grasping jaws 16 at the outer ends fiof the sections. Blade adjunct grasps ing jaws 17 are formed by the bottoms of said slots jan'd'located between 'the side portions 16*and the blade'gr'asping jaws 16 'The jaws "17 are adapted to grasp either-of the two forms of blade adjunct hereinafter described;-

The semicylindrical sides of the sections are provided with enlargements 14: at their outer ends; collectively forming a head termi-j nating in a conical zone 15. On the inner ends of the seinicylindrical sides are formed screw threads 13'.v j i The stropper comprises also "a nut 17O'en gaged with thescrew threads '13 to couple theihner' ends ofthe sections together and having aconical zone 180,and'a tube 19 surrounding the seotionsbetween the zones n and 180.? The bore of thetube is spacedfrom the cylindrical sides of the sections between the'conicalzones by an annular crevice 29, and its ends bear on said conical zones as shown by Figure 1. Said zones are adapted to enter the ends of the tube bore as shown byFigureL When the rod; sections are assembled as, shown by Figure 2 the slots formed in the;

head portions of the sections constitute an 7 oblique passage in which a portion of a blade adjunct ,is insertable. q

Said adjunct may be separable from the blade with whichitis associated, or may be inseparable .therefrom, the V adjunct in each" casejbein'g th'cker than theblade so that it 1, 6, 7 and 8,-and is adaptedto releasably' hold a two edged blade 20, the adjunct be:

ing Tormedto'eXpOSe one edge of the blade and guard the other edge, and provided "with jecting' obliquely therefrom;

tirely exposed and; projects;obliquely'ifrom;

the end face 14 the opposite edge being guarded by the leaves as shown by F1gure 8.

One of the leaves 21 is provided with a stud 24 formed to enter an opening in the blade 20 and-prevent edgewise displacement ofithe blade.

The'extensions 23 are offset from the blade guarding edges of the leaves' 21so that shoulders 25 abutting the head formed by the enlargements lt'are formed on the leaves, said shoulders limiting the insertion of the adjunct into the space between the jaws 17 The' blade grasping jaws 16 are adapted to clamp an endeportion of the blade-20 as in, dicated by Figure 11, and prevent flexure of the blade by pressure of its cutting edge against a strop.

The inseparable blade adjunct 26, Figures 9-and is the well known thick back fixed to the blade 27 of a so called Gem razor, said blade having "only one cutting edge. The jaws 17' are adapted to clamp one'end portion of the adjunct 26Y'as indicated 'by dotted lines in Figure 9' and holdithe single cutting edge of the blade 27 entirely exposed outside the end face 1 1? and in an oblique position relative thereto. Itjwill be seen that when the nut 170 is rotated forward on the screw threads 13 .of'

the'rod sections, the conical zones 180 and are forced simultaneously into the ends of the tube 19,so that equal inward pressure is exerted on the jaw carrying portions of the rod sections, and the clamping aws 16 and ,17 are adapted to simultaneously grasp a portion of the blade and a portion of an adjunct thereof so that a very ffirm grip is maintained on the inserted blade and adjunct.

- he separable adjunct reinforces the blade and prevents flexure and breakage thereof during the stropping operation.

@When the nut 17 0 is rotated backward =1 from the clamping position shown by Fig ure 1,-the' j aw carrying portions of the rod sections are separated from each other by arelatively wide crevice 30 (Figure 12), and

thejaws 16 and 17. are spaced apart so that the blade and adjunct to be clamped are freely insertable between the jaws. The forward rotation of the nut' to the position,

shown by Figure 1 forces the jaws 16 and 17 simultaneously inward and causes them to firmly grip the interposed blade. and :ad-.

junct, the width of the crevice 30 being reduced as shown by Figure 11.

In consequence of the simultaneous entrance of the conical zones 15 and 180 into the ends of the tube bore a nut rotation of small amplitude is sufficient to firmly secure the blade and its adjunct to, the stropper.

, The blade may therefore be secured and released by one complete rotation of the nut or less.

The portions IOTE thG OPPOSGd faces of the rod sections between the oblique jaws 17 and thel :end face .1 4: of the head, said portions.

being designated by 16 in Figure 8, constitute outer-grippingjaws adapted to bear on-opposite sides of the blade 20 or- 27, and cooperate with "the oblique jaws in holding the blade. i

I claim: v

1.' A blade" stropper comprising two i'ndependent oblong rod sections having flatinnersides and semicylindrical outer sides, said sections collectively forming a cylindrical 'rod,jthe inner sides being interrupted by oblique'slots, so that said flat sides in clude elongated inner end portions, and relatively short blade graspin jaws -at,the outer ends of the sections, sai sections having blade adjunct grasping jaws formed by the bottoms of saidslots and locatedbetween the elongated side portions and the blade grasping jaws, the Rsemicylindrical sides having enlargements at their outer'ends collectivelyforming a head terminating in a conical zone, and' 'screwthreads on their inner ends, the stropper' comprising also a nut engaged with said screw threads and 'coupling the sections together at their inner ends, said inut having a conical zone, anda tube surrounding the sections between said head and nut, the bo e of the tube being spaced from the cylindrical sides of the sections, so that the outer end portions-of the sections are movable towardand fromeach other, the tubeiends' bearing on said conical zones, the arrangement' being such thatxa nut rotation of small amplitude forces said conical .zones simultaneously into. the ends of the" tube and causes 1 equalinward pressure on the jaw carrying portions of the sections, so that the blade andzadjunct grasping jaws are adapted to simultaneously grasp a blade and a blade adjunct;

2. A blade stropper'as-specified claim comprising ablade adjunct including two thin sheetimetal leaves between which aitwo edged blade-is inse'rtab lefsaid leaves being narrower than the blade, afiexible-nec-k connecting said leaves atone end' ofthe adjunct, and narrow extensions projecting from the opposite ends of "the leaves and formed-to be clamped between said adjunct grasping jaws, and locate the adjunct so thatone edge, of a blade finse-rted between"'the'fleaves; is entirely exposed outside .said endv face, and

projects obliquely therefrom, the opposite 7 blade edge being guarded by the leaves, one

of the leaves being provided with a stud formed to enter a blade opening and prevent edgevvise displacement of an inserted blade, said extensions being ofisetfrom the blade guarding edges of the leaves so that- GORDON o. GREEN.

In testimony whereof I have aflixed my

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