Swivel Head Razor
Invention Safety Razor
Filed Tuesday, 6th August 1929
Published Tuesday, 17th May 1932
Inventor John W. Ashworth
Owner Ashworth Advertising Company
Language EnglishCPC Classification:
Parts not referenced in the text: None
Parts not referenced in the images: None
This invention is a safety razor and the object of the invention is to provide a razor which may be more conveniently manipulated than heretofore in a manner to more efficiently effect the shaving operation. It is common in the well known forms of safety razors, of which the Gillette, Eveready and Gem are examples, to mount the handle of the razor in perpendicular relation to the head, said handle extending through substantially the center of the head in such perpendicular relation with the blade symmetrically disposed about the axis of the handle. When using the razor of any of the kinds referred to, the face is, in effect, scraped after the manner of manipulating a hoe, the cutting edge of the blade being forced directly against the hair to sever the same by lateral pressure.
My experiments and research in this connection have convinced me that the theory on which these razors operate is wrong and that in order to properly sever a hair with the least possible force, there should not only be a lateral pressure but a drawing of the cutting edge in a longitudinal direction across the hair. Experience has demonstrated beyond peradventure that hair may be more readily cut through the application of these combined forces as stated and there is less tendency to pull on the hair during the cutting operation. A closer shave may be had with attendant greater comfort.
It is of course possible to manipulate safety razors heretofore made in the manner specified but it requires a very steady hand and considerable skill in practice to accomplish this result without cutting the face. The reason for this is due to the fact that the hand is positioned perpendicular to the razor head and the further fact that the razor is manipulated by a lateral thrust on the handle instead of a pull on the handle. In razors of the character described the cutting edge is pushed against the head. In the razor of the present invention, in contradistinction, the blade is pulled into engagement with the hair, moved longitudinally by its edge while in engagement therewith, and said blade may be so adjusted that the drawing of the head of the razor across the chin will bring about the drawing cut such as I have described.
With the foregoing considerations in mind, the razor of the present invention is so constructed that instead of mounting the handle in perpendicular relation to the head of the razor, it is mounted in pronounced angular relation to the axis of the head and is supported on the head for relative adjustment so as to control the angle of the drawing cut to best suit individual requirements.
Another feature of the invention consists in the particular novel form of blade which also forms part of the present invention. This blade being so constructed that the cutting edges are ground from the opposite faces of the blade in order to provide for a close shave or a shave not so close without requiring any adjustment of the blade. It has generally been the practice heretofore, particularly in blades of the Gillette type, to clamp the blade in the head with varying degrees of tightness in order to obtain the desired cut. This has never been satisfactory because if it is attempted to shave with a blade which is not clamped down as tight as it could be clamped, there is every possibility that the handle will rotate loose during shaving and cause cutting of the face. With the blade of the present invention this cannot occur as the blade is clamped down tight all of the time.
Features of the invention, other than those specified, will be apparent from the hereinafter detailed description and claim when read in conjunction with the accompanying drawings.
The accompanying drawings illustrate different practical embodiments of the invention, but the construction herein shown is to be understood as illustrative only and not as defining the limits of the invention.
The head of the razor of this invention embodies a suitable clamping plate
The purpose of forming the surface
It will be noted, however, that by grinding in this way the blade will cooperate with the guard plate in such manner that the edge
It has heretofore been the practice in the manufacture of safety razors to screw a handle directly upon the threaded post
In the structures of
It is well recognized by those who use safety razors that there is a pronounced tendency of the handle to unscrew from the head during use of the razor. To obviate this disadvantage, the handle is preferably provided at one end with a cut out
It will be noted that inasmuch as the post
It will be further noted that by offsetting the mounting of the handle as stated, and inclining the foot with respect to the axis of the handle that it is possible to move the handle into various positions of adjustment as indicated in dotted lines in
The arrangement of
Both of the constructions are, generally speaking, used in the same way, insofar as the shaving operation is concerned and in both of them the angularity of adjustment of the handle with reference to the blade which may be efficiently and easily obtained. In both cases, the blade is drawn over the face instead of pushed over the face as in prior practice and in both cases, the blade is presented to the hair in such manner as to be moved longitudinally with respect to the hair while forced thereagainst in order to obtain the most efficient cutting operation.
The foregoing detailed description sets forth the invention in its preferred practical form, but the invention is to be understood as fully commensurate with the appended claim.
Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:
A safety razor embodying a guard plate provided with a centrally disposed hole, a clamping plate provided with a centrally disposed threaded clamping post extending through the hole in the guard plate, a handle plate positioned rearwardly of the guard plate and having a hole through which the clamping post extends, a nut screwed on to the clamping post to clamp all of said plates together, a threaded handle post carried by the handle plate and extending in angular relation to the handle plate and to the axis of the clamping post, and a handle screwed on to said handle post, said handle being provided with a cut out adapted to be occupied by a portion of the nut when the nut is screwed on to the clamping post for the purpose of locking the handle against inadvertent release from the handle post.
In testimony whereof I have signed the foregoing specification.
John W. Ashworth.