US1400031A - Safety-razor - Google Patents

Description

F. DE GRAZIA.

SAFETY RAZOR.

AP-"LiCATION FILED MAY 20, 1920 Patented Dec. 13, 1921.

F|ca.1.

UNITED STATES PATENT OFFICE.

FERDINANDO DE eRAzIA, or wasnnvo ron, DISTRIGT or comiivrnm.

SAFETY-molt.

Specification of Letters Patent.

Patented Dec. 13, 1921 Application filed May 20,1920. Serial No. 382,953.

- guard plate having a guard roller removably journaled at each edge thereof in proximity of the cutting edge of the blade to protect the cuttinge'dge of the blade.

A further object of the invention resides in the provision of a guard plate for safety razors wherein'a guard roller is removably journaled adjacent each side edge of the guard plate to protect the cutting-edge of the blade and to be substituted for the usual form of guard plate having a serrated toothed edge.

With the above and other objects in view,

the invention consists in the novel form, combination and arrangement of parts hereinafter more fully described and shown in the accompanying drawing, wherein like reference characters designate similar parts throughout the several views.

In the drawing, Figure 1 is a perspective view of a safety razor constructed in accordance with the present invention, showing the guard rollers removably journaled in the opposite sides of the guard plate,

Fig.8 is a vertical transversb sectional view of the razor, with the handle-partially broken away,

Fig. 3 is an end elevational view of the device with the handle partially brokenaway and with the guard rollers shown in dotted lines as removed-from the guard plate.

. Fig. 4 is a. cross sectional view taken on line IVIV showing the resilient gripping fingers carried by the end flanges of the guard plate for revolubly supporting the guard rollers,

Fig. 5 is a detached perspective view of the improved guard plate, and

Fig. '6 is a perspective view ofone of the guard rollers removed from the guard plate.

The present invention has for its primary object to provide a substitute guard plate for the type of safety razor known as the (i illette and emb'odiesguard rollers removably journaled' at each side of the guard plate to function in lieu of the guard teeth upon the plate of the safety razor referred to. The guard rollers are carried by the side edges of the guard plate slightly in advance of the cutting edge'of the razor blade,

and protect the cutting edge of the blade and further present the entire surface to be shaved to the cutting edge of the blade. In

are employed, the razor in cutting only presents spaced portions of its cutting edge for a cutting operation due to a contact of'the cut-ting edge of the razor blade with the guard teeth and it is necessary to direct the cutting movement of the razor in many directions to assure a complete shavlng operation. The guard plate has uninterrupted opposite edges and is formed on a transverse 'arc coincident with the inner curved face of the clamping plate while end flanges carried by the guard plate have the opposite ends thereof bifurcated to form resilient fingers for engaging and revolubly supportingathe guard rollers.

eferring more in detail to the accompanying drawing and'particularly to'Figs. 1, 2, and 4, there is illustrated a safety razor embodyinga clamping plate 7 of elongated form and transversely curved and tapered at the opposite edges thereof as illustrated. A screw plug 8 centrally projects from the inner curved face of the plate 7 for engagement in the threaded socketed end 9 of the handle 10. The type of razor blade employed with this holder and clamping plate mcludes a single opening for the passage of the screw plug 8 and oppositely positioned openings for the passage of the guide fingers 11 extending in alinement with the screw pli ig 8.

he guard'plate employed in this safety razor embodies a plate section 12 transversely curved colncldent to the curvature 100 in Figs. 2 and 5. The guard plate 12 is 105 coextensive with the clamping plate 7 and is provided upon each end thereof with an inwardly directed flange 14, of slightly increased breadth at the opposite ends thereof with the ends of the flanges l4 bifurcated 11c devices of this character where guard teeth as at 15 to form resilient gripping fingers,

the end flanges 14 projecting laterally of the guard plate 12 as shown in Fig. ,5. A guard roller is removably journaled in each side of the guard plate 12 and embodies a cylindrical body portion 16 having a reduced bearing 17 at each end thereof. The

roller bearings 17 are positidned between the resilient fingers formed by the bifurcation 15 and are retained in opposed curved recesse 15' formed in the resilient fingers, the rollers being permitted freely to revolve within their bearings and prevented. from accidental displacement by the resiliency of the fingers. When so positioned, the guard rollers 16 project beyond the oppositeedges of the guard plate 12 and in position to protect the cutting edge of a razor blade.

In assembling the different parts of the razor, assuming that the handle 10 is detachedfrom the'screw plug 8 of the clamping plate, a razor blade 18 having three alined openings therein is placed upon the clamping plate with the fingers 11 projecting through the end openings and the screw plug 8 projecting through the central opening thereof. The guard plate is then positioned upon the clamping plate and in en-i gagement with the blade 18. The socketed end 9 of the handle 10 receives the screw p plug, the end 9 of the handle engages the inner face. of the guard plate 12, and said blade 18 being flexible, the same is curved by the guard plate 12 moving into proximity of the clamping plate 7 to-be tensioned between the two plates and locked therebetween by the screw handle 10. When so arranged, the opposite cutting edges 18' of the blade 18 are positioned inwardly of the guard rollers 16 as shown in Figs. 1, 3, and 4 to be protected by the rollers and also sufliciently spaced therefrom to present the entire cutting edge of the blade for operation. In using the'device, the guard roller 16 rolls over the surface to be shaved and presents the "entire surface contacted by the roller to the cutting edge of the blade. In this manner, the entire cutting edge of the blade is subjected to operation as distinished from the alternate cutting portions of a blade that is protected by a toothed guard plate. In cleaning the device, the sev- 8 and by screwing the handle upon the" handle 10 and the guard rollers 16 are readily removable from the guard plate 12 by forcing the same from the open outer ends .of the resilient fingers carried by the end iflanges. If desired, the bearing ends 17 of the roller 16 may project a sufficient distance beyond each end of the guard plate 12 to facilitategripping of the roller bearings during removal of the roller from the guard plate. Also, knobs or heads may be formed on the ends of the bearings for grasping during removal.

It is intended to construct the complete safety razor in accordance with the invention as above outlined, and also to manufacture the guard plate alone as a substitute for the form of toothed guard plate in the safety razor referred to. While there is herein shown and described the preferred embodiment of the invention, it is nevertheless to be understood that minor changes may 'be made therein, without departing is transversely curved and is provided with end flanges extending laterally of the plate, spaced resilient fingers formed on the extensions of the end flanges, and guard rollers removably journaled in the resilient fingers and retained in operative position on said plate by the resiliency of said fingers.

3. In a safety'razor of the type described,

wherein a guard plate and clamping plate engage a razor blade, with guard rollers removably ournaled on said guard plate, said guard platebeing constructed to resiliently maintain the guard rollers in operative position thereon and to permit removal of the guard rollers by forceful extraction against the resilient retaining means therefor.

In testlmony whereof I affix my signature.

FERDINANDO DE GRAZIA.

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