PATENT SPECIFICATION

Application Date : March 9, 1928. No, 21912/27. Complete Accepted : Sept. 27, 1928.

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COMPLETE SPECIFICATION. Improvements in or relating to Razor Blades.

297,552

I, Herbert Kyle Turner, of 97, Campden Crescent, Chadwell Heath, Essex, a British subject, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement :—

This invention relates to safety razor blades of the type having a plurality of cutting edges co-operating with a guard and cover plate and provided with a suitable handle.

The invention consists in a safety razor blade of the above type having in combination therewith one or more safety guards and means whereby any of its cutting edges may be brought into functional relation with a guard without removing the blade from the holder.

The invention also consists in a safety razor blade as set out in the preceding paragraph having a cover plate hinged to the guard plate.

Further features of the invention will be apparent from the following description.

My invention will now be described with reference to the accompanying drawings wherein :—

Fig. 1 shows a view of one form of my device in a dismantled state;

Fig. 2 is a side view of the instrument assembled for use;

Fig. 3 is a view of the underside of the guard plate; and

Fig. 4 is a side view showing a modification.

Referring now to the drawings; in the form shown in Figures 1, 2 and 3, the instrument having my improved blade, comprises five principle parts, namely, a blade 1, a guard plate 2, handle 3, cover plate 4, and clamping nut 5. The blade 1 is thin and flexible but can be of any suitable thickness and takes the form of regular heptagon whose edges are fashioned to form the cutting edges of the razor, a suitable hole 8 being provided at its centre, and co-operating with any one of a plurality of holes 9 to position the blade 1 upon a screwed stud 10, f[ixed] in the centre of the guard plate 2; and a rounded projection or pin 12 also secured to the guard plate, the arrangement being such that the blade 1 may be raised upon the stud 10 to clear the pin 12 and partially rotated and then lowered to bring any one of its cutting edges into functional relation with the guard 13.

To effect this operation without risk of injury to the operator the guard plate 2 is formed with an arcuate aperture 15 (see Figs. 1 and 3), whereby the blade may be grasped between the thumb and finger of the operator to effect its partial rotation upon the stud 10 without the risk of (bringing the fingers of the user into contact with any of the cutting edges of the blade.

The preferred form of the guard plate, which will be apparent from Figs. 1 and 3 has the part 16 bent in the manner shown and serves to support a threaded stud 17 into which the knurled handle 3 is screwed, whereby it may provide a resilient support for the device when in use or be readily removed for packing. The cover plate 4 is slightly domed at its centre and is positioned upon the guard plate 2 by means of a central hole 21 and a hole 22 located in such a position as to engage with the stud 10 and pin 12 respectively when the instrument is assembled, the whole being secured together by a clamping nut 5 screwed to the upper part of the stud 10. The cover plate 4 is provided with a lug 23 to facilitate its removal when the nut is removed.

The blade 1 may be marked with the days of the week or in any other manner depending upon particular requirements whereby each cutting edge is used consecutively, thus allowing each cutting edge a sufficient interval of time to recover its efficiency before again using.

In the modification shown in Fig. 4 the guard 24 of the guard plate has its two outer teeth provided with downward extensions suitably drilled and co-operating with downward extensions upon the cover plate 26 having their extremities bent inwards to form hinge pins whereby the cover plate may be hinged to the guard plate. The edges of the cover plate and the guard plate remote from the hinge are bent downwards to form the two members 27 and 28 of a spring clasps to secure the parts together when the device is assembled for use.

I wish it to be understood that my invention is not to be confined to the precise arrangement of parts hereinbefore described, as it will be obvious, that the form of the holder may vary with the number of cutting edges provided upon the blade. Furthermore, I may form my guard plate with more than one guard and other modifications may be made in the co-operating parts of the device without affecting the scope of the invention.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is :—

1. A safety razor blade of the type referred to, having in combination therewith one or more safety guards and means thereby any of its cutting edges may be brought into functional relation with a guard without removing the blade from the holder.

2. A safety razor blade according to Claim 1, having a cover plate hinged to the guard plate.

3. A safety razor blade according to Claim 1 or Claim 2 wherein the handle is resiliently secured to the guard plate.

4. A safety razor blade substantially as described with reference to the accompanying drawings.