US1877082A - Safety razor - Google Patents

Description

Sept. 13, 1932- RQE. THOMPSON 7 1,877,082

SAFETY RAZOR Filed NOV. 1'7. 1930 Patented Sept. I 13, 1932 UNITED STATES PATENT OFFICE RALPH E. THOMPSON, OF BROOKLIN E, MASSACHUSETTS, ASSIGNOR TO GILLETTE SAFETY RAZOR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF DELAWARE SAFETY RAZOR Application filed November 17, 1930. Serial No. 496,170.

transversely flexible blade, comprises a cap and a guard member,between which the blade is'clamped to flex it in its shaving position. The longitudinal edge of the cap member bends the blade over the guard to place the shaving edges of the blade in theirproper position relativethe edges of the guard. The

position of theedge of the blade, relative the 5 guard, determ nes the degree of exposure of the cutting edge and the closeness of the shave obtained by the user. 7

The shaving edge of this type of safety razor blade ordinarily cannot be adjusted without (loosening the cap and guard, since the position of the shaving edge is defined by the physical proportions and relative position of the bladeand of, the cap and guard members. It is desirable to be'able to adjust the edge exposure of a flexible safety razor blade to enable the blade to be used for shaves of varying degrees of closeness. According to this invention, a safety razo is provided, the shaving edges of the blade of which can be adjusted as desired to give a close or a coarse shave. This is accomplished in one embodiment of the invention by-having extensions on the cap member press -..against one side of the razor blade to force it closer to the guard member in the clamping operation, thus giving a blade with a low edge exposure which will give a close shave and which, when the blade is placed in an- I other position, will fit into openings in the b1ade,leaving the blade edge in its normal position. I

7 he invention will now be described with reference to the drawing, of which: r Fig. 1- is a plan view of one embodimentof a safety razor blade, according to this invention;

Fig. 2 is a plan view of a'cap member adapted to co-operatewith the blade'of Fig, 1'

Fig. 3 is a side view of the blade, in section,

showing the blade of Fig. 1, the cap member of Fig. 2, and the ordinary guard member in assembled relation, the blade in this figure having its edges in -their normal position;

Fig. 4 is a view similar to Fig. 3, showing how one edge of the blade is given a low exposure by contact with the extensions on the cap member;

Fig. 5 is a plan view of another embodiment of the razor blade, according to this invention; a

Fig. 6 is a plan view of a cap member 7 adapted to co-operate with the blade of Fig.

Fig. "7 is a side sectional viewof the blade of Fig. 5 placed on the cap member of Fig. 6 in one position, and

Fig. 8 is a view similar to Fig. 7, showing the blade on the cap member in another position, in this instance being adjusted to give a low edge exposure.

Referring now to Figs. 1 to 4 inclusive of the drawing, the transversely flexible blade 10 is provided with the central slot 11 which serves to position the blade on the rib 12 of the cap member 13. The blade 10 is pro vided adjacent and near each end of one of its shaving edges, with the small openings 14. he cap member 13 is provided with small projections or studs 15 adjacent and near each end of one of its longitudinal edges, which are adapted to fit into the small openings 14 of the blade 10. When the blade is placed-relative the cap member so that the openings 14 fit over the projections 15, the adjustmentlof the blade edges is unaffected by the projections 15, this condition being shown clearly by the drawing, the blade being there shown clamped between the cap member 13 and the guard 16.

When it is desired that one of the blade edges be given a low exposure, so as to afl'ord a lighter shave, the blade is turned over on the cap member 13 so that the openings14 are adjacent the opposite side of the cap member to that which contains the projections 15.

of the blade, against which they contact, so

' that it is closer to the edge of the guard than it normally is, thus giving a low edge exposure and affording a coarser or lighter shave. The other edge of the .blade has a normal exposure, this condition being shown trated by Figs. 5 to 8 inclusive, comprises the transversely flexible blade 17 which is provided with the central opening 18, through which the threaded stud of the cap member extends. The blade contains the four circular openings 19 which are arranged one near each of the four corners of the blade and the four smaller circular openings 20,

each of which is arranged adjacent one of the openings 19. The distance between the centers of the'circular openings 19 and the distance between the centers of the circular openings 20 is exactly the same, both longitudinally and transversely of the blade. The cap member 21-, which is adapted to cooperate with the blade of Fig. 5, is provided with the four peaked extensions 22, which are spaced apart both transversely and longitudinally the same distance as the distance between the pairs of openings 19 and the pairs of openings 20 in the blade, 'and which are each side.

adapted to engage one or the other of the sets of openings 19 and 20, according to how the blade 17 is placed on the cap member 21.

Fig. 7 illustrates the blade 17 placed on the cap member 21 so that the peaked-projections 22 fit into the large openings 19 of the blade. The openings 19 have sufficient diameter to entirely clear the peaked projections 22, so that the projections when the blade is placed in this position, do not interfere with the blade adjustment. This condition is shown by Fig. 7, the blade inthis instance, when clamped in its holder, having normal edge exposure on both cutting edges. The circular openings 20 have a smaller diameter than the openings 19, and their size is'so arranged, with respect to the size of the peaked projections 22, that when the blade is placed on the cap member with the peaked projections extending into the small openings 20 the blade is placed and held a predetermined distance from the cap member 21. With the :blade so laced, it has, when it is clamped between t e cap and guard members of the razor, its cutting edges depressed nearer the guard edges, due to the projections 22, so that the blade has a less blade exposure on each side and gives, therefore, a lighter shave on In this embodiment of the inae'mosa vention, the blade is shifted longitudinally along the cap member so that one or the other of the sets of openings of the blade engage.

with the projections on the cap member when a close-or a normal shave is desired.

With the embodiment shownby Figs. 5 to 8 inclusive, obviously, the projections 22 could be left ofl of one of the longitudinal sides of the cap member so that one edge of the blade would always give a normal shave and the other could be. shifted to give a light or anormal shave, as desired.

Whereas-rope or more embodiments of the invention have been'described for the purpose of' illustration, itshould be understood that the invention is not limited to the exact details disclosed, as many departures may he made by those skilled .in the art without departing from the spirit of the invention.

What is claimed is: v

1. A safety razor comprising a blade adapted to be transversely flexed between two clamping elements of the razor, apertures in said blade behind one of its shaving edges, and projections on one of said clamping members which fit partially into said apertures behind one edge of said blade and which space said edge of saidv blade from the clamping member with which they are associated.

2. A safety razor blade. havingadjacent the shaving edge a pair ofsm'all apertures and a pair of larger apertures, the distance between the apertures of one o-f the pairs being the same as the distance between the apertures of the other of said pairs.

8. A safety razor comprising, in combination, a blade, a clamping member for sup-.

pqrting said blade, a large aperture'and a small aperture in said blade adjacent a shaving edge, and peaked blade positioning pro-.

jections on'saidmember, said blade being adapted to be placed in two positions on said extensions, in one position the projections pass freely through the larger of said apertupes to give one degree of exposure of the shaving edge, and in the other position the projections contact with the sides of said small aperture to shift the edge of the blade to give another degree of edge exposure.

4.; A safety razor blade having an internal aperture, a cutting edge, and openings of. unequal size located in similarly arranged pairs adjacent to both ends of said edge.

5. A safety razor comprising, in combination, a guard member having a fulcrum shoulder, a flexible blade'having spaced apertures therein, and a cap member having correspondingly spaced projecting studs arranged to engage the blade and bend its cutting edge over said. fulcrum shoulder or to pass into said apertures without bending the blade according to the position in which the blade is presented.

6. A safety razor comprising, in combination, a ard having a fulcrum shoulder, a flexible lade having symmetrically disposed cutting edges and an opening adjacent to one of said edges, and a cap having a stud arranged enter said opening when the blade is presented in one position and to engage the blade and bend its cutting edge over sald fulcrum shoulder when the blade is presented in another position. 7. A safety razor including a guard of convex contour, a flexible blade havin oppositely disposed cutting edges and space openings adjacent to one of said edges, and a caphaving projections so located as to enter said openings when the blade is presented to the cap in one position and to engage the surface of the blade and bend its edge toward the guard when resented in another position.

- Signed at oston, Massachusetts, this 15th I day of November 1930.

RALPH E. THOMPSON.

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