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parts B B B1 Fig1 Fig1 G A2 A F F1 L Fig2 Fig2 C C1 A2 A K D E Fig3 Fig3 M C D F K A J L Fig4 Fig4 A C N J1 J Fig5 Fig5 C N J1 J K Fig6 Fig6

Krisp Razor

PatentGB190902168

InventionImprovements in or relating to Safety Razors

FiledFriday, 29th January 1909

PublishedThursday, 13th January 1910

InventorsWilliam Burnell, William Rawson

LanguageEnglish

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N° 2,168 A.D. 1909
Date of Application, 29th Jan., 1909 (Patent of Addition to No. 26,355, 5th Dec., 1908)" Complete Specification Left, 4th June, 1909 Complete Specification Accepted, 13th Jan., 1910
PROVISIONAL SPECIFICATION.
“Improvements in or relating to Safety Razors”

We, William Rawson, Manufacturer, of 37 Burcot Road, Sheffield, and William Burnell, Manufacturer, of 2 Randall Street, Sheffield, do hereby declare the nature of this invention to be as follows :—

This invention relates to safety razors its object being to provide improvements in the construction of the holder described in the Specification accompanying our Application for Letters Patent No. 26,355 dated the 5th of December, 1908.

In carrying out the present improvements the blade is made of comparatively thin steel and is provided with a longitudinal backing of approximately circular cross-section.

The diameter of the tubular backing is preferably proportional to the width of blade employed, the two dimensions being such as to ensure the correct bevel of the blade being obtained at the cutting edge when the razor is ground and retained when being whetted or stropped. By thus proportioning these two dimensions a feathered edge will not ground on the blade as would be very probable if the backing were too thin whilst on the other hand if the backing were too thick in proportion to the width of the blade the cutting edge could not be ground sufficiently fine.

Either one or two blades of the kind described above may be used with a holder of the kind described in our earlier Specification No. 26,355 of 1908 aforesaid, which is modified as follows:—Where two blades are employed both the base of the holder and the support are provided with two longitudinal grooves adapted to receive the cylindrical backing of the blades which are firmly held in place by clamping the support and base together, the positions of the grooves and the width of the blades being so proportioned that the desired amount of the blade is exposed beyond the support. The support may be clamped to the base by means of a screwed stud attached between the grooves therein and passing through a hole between the grooves in the base of the holder, a suitable nut engaging this stud at the back of the base.

As a modification the support and base may be hinged together, preferably at one end. In one construction the lug to which the handle is attached is formed on the support whilst the base carrying the roller or other guard is hinged thereto. In another construction the lug is formed on the base whilst the support is hinged to one end of the latter. In both cases the parts may be clamped together by a suitably disposed screw which would however be preferably so arranged as not to project above the surface of the support, When the plate described in our previous specification aforesaid is employed to provide bearings at one end for the rollers it may be utilised to clamp the support and base together by providing the hinged part with a projection engaging a hole in the plate, the projection and hole being conveniently so shaped as to be capable of exerting pressure between the support and base when the plate is screwed in place. In order to reduce the number of parts the plate may be secured by means of the screw employed to attach the handle to its lug.


Dated this 29th day of January, 1909.

ARTHUR H. GREENWOOD,

Agent for the Applicants,

Yorkshire Chambers, Angel Street, Sheffield.


COMPLETE SPECIFICATION.
“Improvements in or relating to Safety Razors”

We, William Rawson, Manufacturer, of 37 Burcot Road, Sheffield, and William Burnell, Manufacturer, of 2 Randall Street, Sheffield, 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 razors its object being to provide improvements in the construction of the holder described in the Specification accompanying our Application for Letters Patent No. 26,355 dated the 5th of December, 1908.

In the accompanying drawings:—

Figure 1 shows in plan and end view a razor blade for use in a holder according to this invention.

Figure 2 is a plan of the base portion of a holder according to this invention.

Figure 3 is an end view of the holder showing the parts ready to be secured in place.

Figure 4 is a side view of a modification.

Figure 5 is an enlarged view of a detail and

Figure 6 is ‘a view similar to Figure 5 showing a modification.

Like letters indicate like parts throughout both the drawings attached hereto and those forming part of our Complete Specification No. 26,355 of 1908 aforesaid.

Figure 1 illustrates a well-known construction of blade B which is made of comparatively thin steel as shown and is provided with a longitudinal backing B1, preferably of approximately circular cross-section, which gives to the blade the necessary rigidity.

Two of these blades are preferably used together in a holder of the kind described in our earlier Specification No. 26,355/08 aforesaid. This holder which, in its main features, is of a well known construction, comprises a base portion A and a support C having a screwed stud D passing through a hole in the base A, a nut E being provided by means of which the support may be clamped to the base in order to grip the blades between them. The base A is provided with two longitudinal grooves A2 each adapted to receive the portion of the backing B1 of a blade which projects on one side thereof and the support C is provided with similar grooves C1 having a like function. It will be seen that the position of the grooves A2 regulate the situation of the blades B on the base and that when these blades are in place the engagement of their backing B1 with the grooves C1 will also form guides for the correct position of the support C. The grooves A2 and C1 are conveniently made somewhat larger than the backing B1 in order that the pressure may be exerted on the blade itself between the support and the base.

The cranked handle L, described in our previous specification aforesaid, is attached to the lug K and extends longitudinally in relation to the edges of the blades. The nut E is preferably provided with a tapped hole extending through it in order that the handle L may alternatively be attached to the nut E.

The base A is provided with suitable guards which are preferably in the form of rollers F F1.

The support C and the base A may be hinged or pivoted together at either end. A known method of hinging and clamping the parts is shown in Figure 4 where the support is hinged at M to the end of the base A remote from the lug K, and the parts are clamped together by the nut E engaging the screwed stud D, the hole in the base A being elongated or otherwise shaped to allow of the free passage of the stud D therethrough. If desired however a spring latch, or clip of any desired construction may be employed to clamp the parts together.

Where the plate J, described in our previous specification aforesaid as providing bearings for one end of the rollers F F1, is employed, it may be utilised for clamping the support C to the base A by providing a projection on the support engaging a hole in the plate, or vice versa, the projection and hole being conveniently so shaped as to be capable of exerting pressure between the support and base when the parts are screwed in place. Such a method of fastening is illustrated in Figure 5 where the support C is provided with a projection N adapted to engage the hole J1 in the plate J. The upper portion of the projection N is inclined or wedge-shaped so that it will be appreciated that as the plate J is screwed up to the lug K pressure will be exerted between the support and the base. In the modification shown in Figure 6 the projection is made with straight sides whilst the upper side of the hole J1 is wedge-shaped.

In order to reduce the number of parts the plate J may be secured by means of the screw employed to attach the handle L to the lug K.

In cases where the support C is hinged to the base A it will be appreciated that only one set of grooves need be provided, those in the base or those in the support being dispensed with according to whether it is desired that the edge of the blade be turned towards or away from the guard.

Modifications may be made without departing from this invention, as for example, one blade only may be employed. The lug K may in some cases be formed on the support C or dispensed with altogether by utilising the plate J for the attachment of the handle.


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


1. In a safety razor the combination with one or more comparatively thin blades having a longitudinal backing of a holder comprising a base and a support, grooves in the base or in the support or in both for the reception of the backing on the blades, means for clamping the base and support together and a cranked handle extending longitudinally in relation to the blade edges substantially as described.

2. In a safety razor the combination with one or more comparatively thin blades having a longitudinal backing of a holder comprising a base and a support hinged together grooves in the base or in the support or in both for the reception of the backing on the blades a detachable plate such as J capable of attachment to one hinged part, a projection on the other hinged part (or on the plate) engaging a recess in the plate (or in the said other hinged part) either the projection or the recess being wedge-shaped substantially as and for the purpose described.

3. The combination and arrangement of parts constituting the complete safety razor substantially as described and illustrated in the accompanying ‘drawings.


Dated this 4th day of June, 1909.


ARTHUR H. GREENWOOD,

Agent for the Applicants,

Yorkshire Chambers, Angel Street, Sheffield.