Razor with Square Blade
FiledThursday, 8th April 1909
PublishedTuesday, 1st March 1910
InventorJohn K. Waterman
Parts not referenced in the text: None
Parts not referenced in the images: None
To all whom it may concern:
Be it known that I, John K. Waterman, of Norfolk, in the county of Norfolk and in the State of Virginia, have invented a certain new and useful Improvement in Safety-Razors, and do hereby declare that the following is a full, clear, and exact description thereof.
The object of my invention is to provide a safety razor which will be adaptable to all portions of the face, and which will have a great extent of cutting edge, and withal will be simple of construction and convenient of manipulation in assembling and separating its parts, and to such ends my invention consists in the safety razor having the construction substantially as hereinafter specified and claimed.
In the accompanying drawing,
My invention in the embodiment illustrated, as is common in safety razors, comprises a toothed guard plate
In outline, the blade and the head and guard plate are angular in form, and as I prefer it, they are square, although, as illustrated in
In order to increase the adaptability of the razor to the surface of the face, the outer side of the clamping head is curved convexly, as are the corresponding surfaces of the blade and the guard plate, and in order to enable the blade, which is made of sheet or thin material, to be caused to assume the concavo-convex form required, it is slit on diagonal lines from the angles or corners by slits or slots
It will be seen that by reason of the curvature of certain of the cutting edges, access to portions of the face is possible, to which it is difficult to apply a straight edge, and by reason of the straight form of certain of the cutting edges portions of the face may be more comfortably and satisfactorily shaved than if only curved cutting edges were employed. The slitting of the blade as it renders each of the several edges independently adjustable, enables certain of the edges to be curved and others straight. It will be observed that the side edges of each slit or slot diverge outwardly. The object of this is to enable the closing in of the side edges under the pressure of the clamping means, so that when wholly clamped said edges may be in contact.
Instead of making the blade of flexible or bendable material, it may be made of sufficiently stiff material, so that in its original form it has the concavo-convex shape to which the bendable blade is pressed, and in this case it is not necessary to provide the blade with slits because it always has the one form.
In order to enable the blade to be reapplied, after the parts have been separated, in the same position, I suitably mark the corresponding portions of the blade and of the head, as by numbers, using, for example, the numbers
Having thus described my invention, what I claim is—
A safety razor comprising a handle, a guard plate having a concavo-convex blade seat, the edges of which are straight and curved, a like shaped clamping plate, a blade between the guard plate and clamping plate and means whereby the blade is held to the straight and curved outline of the guard plate.
In testimony that I claim the foregoing I have hereunto set my hand.
John K. Waterman.
Chas. J. Williamson,
F. J. Ehlers.