US892629A - Safety-razor. - Google Patents

Description

N 892 629. PATBNTED JULY v 190s.

G.P.TAYL0R.

SAFETY RAZOR.

D 9. APPLICATION FILE APB 1906 2 BEBETB BHEET 1.

. PATENTED JULY 7, 1908. G. P; TAYLOR. SAFETY RAZOR. APPLIOATION F1Lnnn.9.-19oe.

z ann-SHEET 2.

GEORGE P. TAYLOR, OF CLINTON, MASSACHUSETTS.

SAFETY-RAZOR.

No. 892,629. j

Specification of Letters Patent.

Patented July '7, 1908.

Application filed. April 9, 1906. Serial No. 310,669.

j citizen of the United States, residing at Clinton, in thecounty of Worcester and State of Massachusetts, have invented a new and useful Safety-Razor, of which the following is a specification. c

My invention relates to that class of razors known as safety razors, the principal objects thereof being to provide such. a razor aving a rigid, permanently shaped concavo-conveX polygonal blade of substantially uniform thickness having means for supporting and positively holding the blade at three or more points; to force the backing plate against the guard-plate by means effectively a plied to the backing-plate on the side of t e lade op osite to that on which the backingplate is ocated so as to get more efficient action; to so construct the parts as to avoid the liability of injuring the edges in setting the blade; and to provide means whereby the blade will not have to be changed as often as is the case with the present vmakes of safety razors. y

Further objects and advantages of the yinvention will appear below.

Reference is to be had to the accompanying drawings in which,

Figure l is a side elevation of' a razor constructed in accordance with the principles of my invention. Fig. 2 is a sectional view of the same on the line 2--2 of Fig. 3. Fig. 3

Ais a plan of the backing-plate of the same.

Fig. 4 is a plan of the blade. Fig. 5 is a plan of the ard-plate. Fig. 6 is a sectional view on the ine 6-6 of Fig. 7 showing my invention in a modified form. Fig. 7 is a plan of the backing-plate of the same. Fi 8 isa plan of the guard-plate of the form s own in `ig. 6. Fig. E) is a sectional view on the line 9-9 of Fig. 10 showing another form in which my invention may be embodied. Fig. 10 is a plan of the backing-plate of the same. Fig. 11 is a plan of the guard-plate usd in Fig. 9, and Fig. 12 is -a central verticasectional view showing another forni of the invention, and Fig. 13 is a sectional view of a part of the same.

Referring to thefirst five iigures, it is to be noted that the invention is shown as applied to a hollow handle 1() through which asses a rod 11. This rod is rovided with a liead 12 constituting a shou der on the end of the handle 10 While thehandle is rovided with an inwardly projecting ring 13 earing on the rod and assisting in keeping the latter 1n centrai position. `Above this ring is a socket 14 in which is located a hub 15 constituting a artA of the guard-plate 16. This hub is holow and through itis adapted to move a projection 17 on the backing-plate 18. This projection is hollow and internally screw. threadedI to fit the screw on the rod 11. A blade 1S) is provided with a perforation 20 through which the projection 17 extends. It will be seen that by this construction, the force to hold the backing-plate is exercised by the clamping means which, in the present form, is represented by the screw-threaded rod entering the screw-threaded projection 17. rhis clamping means is located on the o posite side of the blade from the backingp ate 18 and it exerts pressure on the backing-plate in such a manner as to most efficiently hold the blade in position on the guard-plate. By this construction also, there are no projecting parts on the backing plate and nothing which is likely to be injured or to cause injury. The adjustment of 4the backingplate is readiiy secured by turning the hea 12, while the backing-plate is accurately located in central position by the bearing of the ring 13 on the rod 11, also by the hub 15 bearing on the rejection 17 The most successful sa ety razors which have heretofore been constructed are rovided with resilient flexible blades. t is Well .known that the tempering of steel for a razor is carried on at a diierent temperature than tempering for springs, consequently if the resiliency of this blade is secured in its highest de ree, it is at the expense of the 'temper'of t e blade for the purpose for which it is intended. Furthermore, by providing these normally flat blades and forcing them to a curved position, if they are not given a proper spring. temper, they are likely to become set when kept clamped in the holder for long periods or theyeven may be broken when under the pressure necessary to hold` them firmly in position. In order to overcome these difficulties and to generally imrove articles of this class, have formed the blade 19 of a comparatively rigid piece of steel of substantially uniform thickness havinfr a permanent form. This form is preferi yab y concavo-convex and the guardlate and backing-plate are of corresponding s ape so that the entire attention of the manufacturer can be given to producing the proper steel and the proper temper for the best razor blade. 'As this blade does not have to be bent or iiexed while setting it in the tool, it does 'not have to undergo the severe strains mentioned and does not have to be teinpered in such a way as to in any de ree destroy its value as a razor blade.) hgurthermore, it can be more easily honed and stropped. lRazor blades of this character i have usually been provided with one or at the most, two cutting edges, and when set in the handlehave been held by pressure ex erted between the backing-plate and the guard-plate and have been positively held by p'ojections or the like at the two ends of the ade. A The positive means for holding the blade is necessarily relied upon to a great extent in A securing 1t 1n ositlon and 1t 1s of course imtively holding-means at the ends of the sev eral 'cutting edges and for three or more cutting edges, I have placed three or moreholding means on the blade and have not only secured the results above mentioned but have provided a blade which can be used longer and consequentlydoes not have to be changed j as often as those which haveheretofore been used. v

The holding means to which I have referred'. consists in the form now being described, of three projections 21 and a guard- I thorou hly kee in a su plate 16. The projections `fit, when thev arts are 1n posi'tiin in notches 22 on the blade and similar notches 23 on the backingplate. In the form illustrated in Figs. 6,- 7 and 8, the parts are of a similar nature but the backing-plate itself is provided with a projection 24 which passes through an enarged perforation in the blade and into a cavity 25 on the' guard-plate. 4This assists `in guiding the arts and as this shoulder and cavity are'of t e same general shape as the blade, in the present instance triangular, the same result as to positive holding of the parts in position is secured. In this instance the other parts are as above *described but the ends of the cutting edges of the blade are rigidly connected together so as to more the concave-convex blade stantia y rigid condition independently of the thickness `of the material 'of which it is made. This is also true of the form shown in the next three figures.

In the form shown in'Figs. 9, 10' and 11',

instead of a roundedv concavo-convex blade,

backing-plate, and guard-plate, I have' illustrated these elements as being provided with s'eaeae j l j a number of blade surfaces corresponding to the number ofcutting edges ofthe blade. .When three cutting edges are used there will be three planesrintersecting in three lines,

and giving the general concavo-convex effect and the advantages thereof.

with an upwardly extending flange 26 having a notch 27 therein. In this case, the blade is provided with a'corres ondin projection 28 'entering the notch an affor' ing the-means for holding the parts positively in position. The backing-plate may also be ,constructed in the same shape as the blade.

It will bei seen that when the principles one of the forms shown or otherwise, the objects mentioned above will be attained.

In Figs. 12 and 13 I have shown another form in which the backing-plate may be clamped to the main body of the structure., In this form, the clamping plate, which forI Fig. 6, is not provided with a perforation but is secured directly to a rod 111 which. passes through the hollow handle 10 and has an. en- `largement, at its outer end.l This enlarge ment is provided with. a cam groove 113 which is referably helical and with a longitudinal s ot 1 14 communicating with the end of the groove. In place of the head 12, shown in the other figures., a cap 120 is proadapted to enter the grooves 114 and 113 to 'clamp the parts in position in an obvious will be observed that the objects above mentioned are attained with this form, at least, as efliciently as with the other forms illus-v trated. e

. While I haveillustratedand described certain forms in which my invention may be emisnot limited to these specific forms, as many modications niay be made by any person skilled in the art,fwithin the scope of my in-` vention as expressed in the claims.

Havin thus`fully described my invention,

1. In a safety razor, the combinationofa hollow handle having a socket, .a screwthreaded rod passing through said handle, a guard-plate, separate from the handle and having ahub cooperating with the socket therein and a backing-plate havingl an internally screw-threaded hollow projection passing into said socket and engaging the screw-threaded rod.

2. In a safety razor, the combination of a hollow handle having a socket, a screwthreaded rod passing through said handle, a guard-plate having a hollow hub projecting meeting preferably at the center ofthe knife vided, this cap having a projection .121"

bodied, it is to be understood that the same what I c aim andvdesire to secure by Letters into the socket, and. .a backing-plate havingl In this form also, I haveshown a guard-plate as provided thus set forth are carried out, Whether in any convenience is illustrated as of the type ofV f .manner against the end ofthe handle 10. It

i an internally screw-threaded hollow projeclio handle, a guard-plate se ,tion passinginto said socket and hub and engaging the screw-threaded rod, and a rigid blade located on said plate, said blade having an opening for said projection.

4. In a safety razor, the combination of a hollow, handle having a socket, a screwthreaded rod passinf through said handle, a guard-plate separab e from the handle and having a hollow hub, a backing-plate having an internally screw-threaded ho low projection passing into said socketand hub and engaging the screw-threaded rod, and a rigid blade located on said plate, said blade having an opening for said projection, said guardplate having means located at more than two points for holding the blade in fixed position.

5. Ina safety razor, the combination of a hollow handle, ascrew-threaded rod therein, a guard-plate separate from the handle, a backing-plate having an internally screwthreaded hollow projection passing into the handle and engaging the screw-threaded rod, and a rigid blade having an opening for said projection, said guard-plate having means ocated at more than two points for holding the blade in fixed position, said means comprising a non-circular cavity fitting the projection on the backing-plate.

6. In a safety razor, the combination of a hollow handle, a rod passing therethrough, a guard-plate separable from the handle and having a hollow hub projecting into the handie, said rod entering lsaid hub, and a backing plate having van integral projection passing into said hub and removably secured to said rod.

7. In a safety razor, the combination of a arate from the handle having a polygona cavity2 the handle having means for fixing the position of the guard-plate, and a backing-plate havinOr a projection passing into the cavity and guided thereby.

S; In a safet razor, the combination of a I' handle, a guar( -plate separate from the handle having a tr1angular cavity in its outer face, the handle having means for fixing the position of the guard-plate, and a bac ingplate having a triangular rojection passinor into thecavity in the guardplate and guided thereby to hold the blade 1n fixed position between said plates.

9. In a safety razor, the combination of a hollow handle, a rod therein, a guardlate having a hollow hub projecting into'the andie, a backinglate having a projection passing into the hu and secured to the rod, said backing-plate and guard-plate being ol' a general triangular forni, and a blade having lthree cutting edges and three non-cutling edges, each of the latter being opposite one of the cutting edges, said blade being held between the guard-plate and the backingplate. g

'10. In a safety razor, the combinationA of a guard-plate having a non-circular cavity therein, a backing-plate having a projection of the same shape as said cavity, and adapted to pass into the cavity to guide the guardplate and backing-plate and prevent their turning with res )ect to each other, and means extending t irough the projection and the cavity for fastening the guard and backing plates together.

1l. A safet razor having a rigid permanently sha e 'concave-convex polygonal blade of sustantially uniform thickness.

, 12. In a safety razor, the combination of a hollow handle, a rod therein, a guard-plate separable from the handle and having a hollow hub projecting into the handle, a backinglate having a projection passing into the liub and secured to the rod, a permanently concavo-convex blade, the guard-plate and backinglate being of the same shape as the. blade, tie backing-'late having a central projection having si es at an angle to each other, each side being parallel with a cutting edge of the blade, the guard-plate having a de ression for receiving said projection and ho dino* the parts in position.

13. In a razor, the combination of a handie, a guard-plate separable from the handle and having a triangular cavity in its outer side, a backinglate having a triangular projection adapte to enter said cavity, said lates being concave-convex, a cutting blade aving a triangular perforation for receiving the projection on the backing-plate, said blade being permanently concave-convex and having a cutting edge parallel with each of the edges of said erforation, ,the curvature of the blade being along lines parallel with xthe cutting edges whereby the blade is held in position on the guard and backingplates partly by its own curvature.

14. As an article of manufacture, a safety razor having a permanently shaped polygonal concave-convex cutting blade, a conveX Guard plate, and a concave backing la'te of substantially the same shape as the bllade, whereby the backing plate and guard plate may be clamped toget 1er upon the blade to hold it without bending it.

l5. As an article of manufacture, a safety razor having a polygonal concave-convex cutting blade, the curvature of the blade being on lines parallel with the cutting edges, a convex guard plate, and aconcave backing plate of substantially the same shape as'the blade, whereby the blade may' b held in pol having a proJection passing into said socket,- sition on the guard and backing lates partly and means onysaid rod for securing the said by its own curvature, and said p ates ma be parts together. i clamped together upon the blade to ho d it In testimon whereof I have hereunto set 5 Without bending it. my hand', in t e presence of two subscribing v15 16. In a safety razor, the combination of a witnesses.

hollow handle having a socket, a rod passing GEORGE P. TAYLOR. through said handle, a guard vplate separable Witnesses: A from the handle and having a hub ooperat- VLOUIS W. SOUTHGATE,

lo i'ng with the socket therein, abaoking plate l C. F. WEssoN. :i

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