US 1171290 A
Description (OCR text may contain errors)
- APPLICATION FILED FEB. 6, 1915.
1,171,290. Patented Feb. 8,1916.
UNITED STATES PATENT OFFICE.
THOMAS WILD, OF MOSELEY, BIRMINGHAM, ENGLAND.
To all whom it may concern." l
Be it known that I, THOMAS W1LD,sub]ect of the King of Great Britain, residing at,
143 St. Pauls road, Moseley, Birmingham, England, have invented certain new and useful Improvements in Safet -Razors, 'of which the following is a speci cation. 7
The invention relates to a safety razor of the kind using a thin flexible and resilient blade which is positioned and clamped between a back plate and a guard plate, the latter having rigidly applied to it the handle by which the razor-is held for use.
.Said handle is usually-of straight rod form extending from the guard plate at right angles.-
It is guard plate with registering transverse curvatures, to strain the flat thin blade during positioning and clamping to a corresponding curvature, the cutting edges of said blade after the straining being still at right angles to the axis of the handle.
The invention provides for the blade being additionally strained orbent and clamped and fixed in a manner setting its cutting edge or edges at an inclination to the axis of the handle, or at an inclination to the direction of hand pull from the handle, to, in
effect, provide in a safety razor a longitudinally inclined cutting edge. The back plate and guard plate are each bodily formed with a longitudinal twist, or are upon their clamping faces, shaped in such manner that when the bladeis strained and clamped a fixture between them it has a diagonal curvature-put into it in addition to a transverse curvature, setting its cutting edge or edges inclined to the axis of the handle, theback plate and guard plate being correspondingly.
set inclined to'the axis of the handle to give the requisite support to the cutting edge or' edges for its, or their, full length. The additional straining aforesaid strengthensand givesvincreased rigidity to the cutting ed es.
The improvements aforesaid, hereina er 1 clearlyv stated in the .claims' are illustrated by the accompanying sheet ofdrawings.
. Figure 1 is a side elevation of the razor head and part of the handle. Fig. 2 is a left hand end elevation of Fig. 1. Fig. 3 is a transverse section of Fi 1;on the dotted line A, looking to the le t. Fig. 4 is a sectionon the dotted line B Fig. 1, looking to the left. Fig. 5 is a section on the dotted line C Fig. 1, looking to the left. Fig. 6
known to provide the back plate and Specification of Letters Patent. i Patented Feb. 8,1916. Application filed February 6,1915. Serial No. 6,552. v r
shows an end'elevation of the guard plate and handle separate. Fig. 7 shows an-end elevation of the back plate and its parts separate. Fig.
, Except for the shaping of the back plate a and the guard plate 0, and the consequent 8 shows an endelevation of. the flat blade.
straining to the same shape of the blade d,
the handle 0 to be engaged by a sleeve nut (not shown) applied at the outer .endof the handle, and a g are the positioning pins carried by the back plate to engage registering holes of the blade and the guard plate for purposes well known. The teeth on the i guard plate are like those usually used an are shown at 0 The clamping faces as and guard plates are shaped with a registering longitudinal twist providing, as shown, a diagonal curvature, and when the flat flexible resilient blade d is strained, by clamping it between these faces, the cutting edges (1 d of said blade are setinclined to'the axis of the handle 6?; so that a hand pull fromthe handle in using the razor brings inclined and y of the back cutting edges into operation, giving a slant-.
ing or inclining cut. 'This setting of the cutting edges inclined .to the axis of the'handle is very clearly represented by Fig. 1. The blade so set has therefore a diagonal curvature as well. as a transverse curvature from a bendwhich is substantially a longitudinal twist, and this has the effect of ma-' 'terially strengthening the cutting edges as well as assisting the ease of shaving, par ticularly in the case of astubborn beard.
Having now particularly described my invention what I claim and desire to secure by Letters Patent is a 1. A safety razor, including a back plate and guard plate whose inner blade-clamping faces areeach formed with a registering longitudinal twist, a blade adapted ,to be clamped between these faces so as to strain it to the longitudinal twist, and ahandle whose axis is set inclined to the cutting edge u or edges of the blade; the clamping of the blade putting a diagonal curvature into said blade in addition to a transverse curvature, substantially as described.
- v 2. A safety razor including, a back clamping plate and a complemental guard clamp- "in'g plate, each having a substantially spiral formation so that the same are twisted longitudinally, a substantially flat blade adapted to be clamped between the clamping faces of said guard and back strained into a longitudinal twist co'rrelates and to be sponding to said plates, and a handle to in which, said plates are secured, said handle-- extending at right angles from the clamped.
plates as a Whole and atan angle out of right angles to the twisted edges thereof.
In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 15