Self Sharp Safety Razor
Invention Self Sharpening Razor
Filed Monday, 20th May 1935
Published Tuesday, 13th October 1936
Inventor Homer A. Mead
Language EnglishCPC Classification:
Parts not referenced in the text: None
Parts not referenced in the images: None
This invention relates to self sharpening safety razors and particularly to razors of that type using double edged blades. My principal object is to provide a razor of this character constructed so that both edges of the blade on both sides will be sharpened at one operation and without removing the blade from the holder plates between which it is mounted for shaving purposes. The holder plates themselves form the sharpening members and are so mounted that if unclamped or loosened from the blade and reciprocated lengthwise by a motion imparted to the handle, they will move with a diagonal sweeping action over the opposite edges of the blade alternately and will effectively strop or sharpen the same. The plates may be readily alined with each other after a sharpening operation by a simple finger movement, and when they are again clamped to the blade, also by a simple hand movement, the razor is again ready for shaving. Sharpening or stropping of the blade may therefore be repeated if necessary at various times during a shave without any appreciable loss of time.
A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.
These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.
In the drawing similar characters of reference indicate corresponding parts in the several views:
Referring now more particularly to the characters of reference on the drawing, the head of the razor is in the form of a bar
Engaging the blade on the face thereof opposite from the clamping plate is the guard plate
Such pressure is imparted to the guard plate by turning the handle. A washer
To assure a proper snug engagement of the stem with the tapped head opening
To sharpen the blade the blade engaging plates are loosened as above described and a motion is imparted to the handle to reciprocate said plates lengthwise. Owing to the oppositely cut diagonal slots in the plates, the latter will be shifted longitudinally in a common direction but in opposite directions laterally, so that the side edges of the plate
To again place the plates in a shaving position relative to the blade the head
The diagonal sliding of the plates on the blade also exerts an efficient cleaning action on the blade, scraping off any layer of soap and hair which may have been deposited thereon along the edges, as frequently occurs.
From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.
While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims,
Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is:
1. A self sharpening razor comprising separate blade guard and clamping plates also forming sharpening elements, means to mount a blade between the plates, and means mounting the plates for reciprocating movement relative to the blade in a common longitudinal direction and opposed lateral directions simultaneously to cause the side edges of the plates to pass over the side edges of the blade in sharpening engagement therewith.
2. A self sharpening razor comprising a head bar, longitudinally spaced pins projecting from the under face of said bar, a clamping plate engaging said face and having diagonally extending slots through which the pins project, a guard plate also having diagonally extending slots through which the pins project, said plates also forming blade sharpening elements, means to mount a blade between the plates in substantially non-movable relation thereto, and a handle adjustably connected to the head and engaging the guard plate to selectively clamp a blade between the plates and to also clamp the clamping plate against the head, or to release the plates from such clamping pressure; the direction of angularity of the diagonal slots in the two plates being opposed relative to each other and to the central longitudinal axis of the head bar.
3. A self sharpening razor comprising a head bar, longitudinally spaced pins projecting from the under face of said bar, a rigid clamping plate engaging said face and having lateral slots through which the pins project, a rigid guard plate also having lateral slots through which the pins project, said plates also forming blade sharpening elements, means to mount a blade between the plates in substantially nonmovable relation thereto, a handle projecting from the under side of the guard plate separate therefrom, a reduced screw stem on the handle adjustably threaded into the head; the plates having lateral slots parallel to the first named slots and through which the stem projects and a compression spring acting to exert a yielding pressure against the guard plate and completely countersunk in the handle when the latter is engaging the guard plate to clamp a blade between the plates.
4. A self sharpening razor comprising a head bar, longitudinally spaced pins projecting from the under face of said bar, a clamping plate engaging said face and having diagonally extending slots through which the pins project, a guard plate also having diagonally extending slots through which the pins project, said plates also forming blade sharpening elements, a blade having a longitudinal slot adapted to be disposed between the plates, bars rigid with the pins intermediate their ends and projecting into the blade slot to centrally locate the blade relative to the head, and a handle adjustably connected to the head and engaging the guard plate to selectively clamp the plates, blade and head together as a rigid unit or release them from such clamping engagement.
5. A self sharpening safety razor comprising clamping and guard plates, also forming blade sharpening elements and adapted to receive a blade therebetween, a relatively stationary head bar, and means between the bar and the plates and blade to maintain the blade in substantially non-movable relation to the bar while allowing the plates to reciprocate relative to the blade in opposed lateral directions, but in common longitudinal direction, simultaneously.
6. A self sharpening safety razor comprising clamping and guard plates, also forming blade sharpening elements, said plates having lateral diagonal slots cut therethrough and which extend at opposite angles relative to the longitudinal axis of the plates, a blade adapted to be disposed between the plates and having a longitudinal slot therein parallel to the longitudinal axis of the blade, a relatively stationary head bar and means on the head bar engaging the slots in the blade and plates and arranged so that the blade is held immovable with the bar, while the plates are guided for reciprocating movement in opposed lateral directions but in a common longitudinal direction, simultaneously.
Homer A. Mead.