US3040430A

US3040430A - Safety razor having a vibration damping blade mounting member

Info

Publication number: US3040430A
Application number: US789875A
Authority: US
Inventors: Randolph Harry Beckham
Original assignee: Individual
Current assignee: Individual
Priority date: 1959-01-29
Filing date: 1959-01-29
Publication date: 1962-06-26
Anticipated expiration: 1979-06-26

Description

June 26, 1962 H. B. RANDOLPH 3,

SAFETY RAZOR HAVING A VIBRATION DAMPING BLADE MOUNTING MEMBER Filed Jan. 29, 1959 [3a I I I76: 1, lJa/ F/GZ.

M I i ll a P 442a United States Patent 3,040,430 SAFETY RAZOR HAVING A VIBRATION DAMPING BLADE MOUNTING MEMBER Harry Beckham Randolph, 16 Pall Mall, London, SW. 1, England Filed Jan. 29, 1959, Ser. No. 789,875 3 Claims. (Cl. 30-41) This invention relates to safety razors for wet shaving.

Although not restricted to such razors, the invention is particularly applicable to razors having a head of the one-piece type in which the cover is split and hinges on the guard to open outwardly and upwardly for insertion or removal of a blade. I

According to the present invention there is provided a safety razor having a blade mounting member upon which a blade can be clamped by a cover, said blade mounting member being of synthetic resin plastic material and being supported and secured in position by a metal member which provides the guard or guards for the razor, the surface of the blade mounting member to which a razor blade is clamped being of such an extent that the undersurface of the razor blade is supported substantially only by the mounting member.

The invention also provides a razor 0f the one-piece type comprising a blade mounting member, a metal 3 guard member and a split metal cover which hinges upwardly and outwardly relative to said blade mounting member to enable a blade to be removed from or placed gon said blade mounting member, the blade mounting member being of synthetic resin plastic material and being supported by and secured to said guard member, the

extent of the upper face of said blade mounting member being such that the blade is substantially only supported by said blade mounting member on the face adjacent thereto when clamped on the blade mounting member by closure of said cover.

One construction of safety razor in accordance with the present invention will now be described, by way of example only, with reference to the accompanying drawings in which:

FIGURE 1 is a part-sectional end elevation of this construction of safety razor;

FIGURE 2 is a side elevation of the razor shown in FIGURE 1; and

FIGURE 3 is a plan view of the blade mounting member only.

Referring now to the drawings, it will be seen that this particular construction of razor is of the one-piece type comprising a handle 10, a guard member 11, blade mounting member 12 and spilt cover 13, which latter by rotation of the knob 14 at the lower end of the handle can be moved to open outwards and upwards for insertion or removal of a blade 15. The method of efiecting movement of the split cover 13 is well known, and

it is sufficient to say that when the cover 13 is in the closed position clamping the blade 15 on the mounting member 12, rotation of the knob 14 in appropriate direction will effect an upward movement of a center rod 16, due to the threaded engagement of its lower end 16a with the metal insert 14a of the knob 14, and this upward movement of the center rod 16 causes a like displacement of a locating tongue 17 whose two side wings 17a, 17a are each pivotally connected at each end respectively to downwardly extending

arms

13a, 13a of the split cover 13. Towards the end of the upward movement of the tongue 17, the outwardly directed

fingers

13a, 13a of the

cover arms

13a, 13a each engage an adjacent inward projection 11a on a respective one of the guard surfaces 11a, 11a and as a'result the two parts 3,940,430 Patented June 26, 1962 of the split cover 13 hinge upwardly and outwardly to a position at which the blade 15 can be replaced;

It will be seen that the undersuiface of the blade mounting member 12 seats on the guard member 11, and laterally extending tongues 12c forming part of the member 12 fit within the turned over edges ofmember 11 which form the guard surfaces 11a, 11a. A part 12f of the blade supporting member extends upwardly above the level of the tongues 12e into supporting abutment with the cover 12, the outer upright surfaces of the part 12f being substantially coplanar with the respective outer longitudinal edge of the cover. The center line of the blade mounting member 12 lies above the level of the guard surfaces 11a, 11a and the upper surface of the blade mounting member 12 slopes downwardly in each direction from the center line towards the guard surface 11a. In this way, the majority of the undersurface of the blade 15 is in contact with the upper surface of the blade mounting member 12 when the blade 15 is clamped by the cover 13 on the mounting member. I

Two apertures 11b, are provided along each side of the undersurface of the guard member 11 and cut-out portions 12a are moulded in the blade mounting member 12 so that the sloped faces thus formed co-operate with the opposing edge of the guard member 11 to form venturi channels through which rinsing water can pass to clean the cutting edges of the blade 15 clamped in the razor.

The blade mounting member 12 is moulded with a central hole 12b through which the end of the handle 10 can pass, this hole 12b being formed with an inwardly extending flange over which the end 10a of the handle 10 is turned to secure the blade mounting member 12 and guard piece 11 in position on a flange 10b formed integrally with the handle 10. The blade mounting member 12 is formed with a longitudinal slot 12d which accommodates the locating tongue 17.

The blade mounting member 12 is formed of a material of less hardness than metal and which will withstand water and the maximum temperature to which the razor may be exposed during normal and reasonable use. By using a material of appropriate hardness, the vibration of the blade during use is reduced or substantially eliminated. We prefer to use synthetic resin plastic materials for the blade mounting member 12, and the material which we have found most satisfactory for this purpose is nylon. However, other plastic materials such as polyvinyl chloride, polyethylene or synthetic rubber may be used for this purpose. A further advantage of the construction described and illustrated is that the blade is seated over a larger area than is the case in many razors of the one-piece type in current use, and that the surface of the blade intermediate its clamping locations adjacent each edge is given additional cushioning or support which reduces vibration of the blade during use and serves to absorb shock.

What I claim is:

1. In a safety razor for supporting a double edged razor, a blade mounting member of vibration damping synthetic material, a metal cover for clamping 'a blade on said blade mounting member, said blade mounting member comprising upper portions which are substantially coextensive with said cover and lower portions, tongues on said lower portions projecting laterally of said cover along the longitudinal sides of the razor, a thin metal guard member defining a cradle-shaped recess re ceiving said blade mounting member therein, longitudinal edges of said guard member being wrapped over said tongues for preventing lateral spreading of the blade mounting member, each said upper portion of the blade mounting member extending laterally into abutment with 3 a respective longitudinal edge of said guard member and a handle connected to said guard member.

2. In a safety razor for supporting a double edged razor, a handle, a thin metal guard member having apertures adjacent opposite blade edges to provide passages through said member for rinsing each edge of the blade, said guard member being trough shaped in cross-section, longitudinal edge portions of the guard member being turned over inwardly, a blade mounting member of vibration damping synthetic material rigidly mounted in said trough and a cover for clamping the blade on said blade mounting member, said blade mounting member eX- tending laterally to saidturned over portions of the guard member and upwardly above said turned over portions, tongues integral withv said blade mounting member extending laterally to fillthe space within said turned over portions to each side of said passages, a substantially up right surface on each longitudinal side of the blade mounting member abutting a respective one of said turned over portions and terminating in the upward direction in abutment with the blade adjacent its cutting edge.

3. In a safety razor for supporting a double edge blade, a blade mounting member of vibration damping synthetic material, a double edged blade, a metal cover clamping said blade on said blade mounting member, a handle, a thin metal guard member, means supporting said guard member on the upper end of said handle, longitudinal edge portions of said metal guard member being folded over inwardly to define a cradle shaped recess extending across the full width of the razor, the guard member over its entire width between the turned over portions being spaced from the blade cover by a distance equal to the thickness of the blade mounting member and the I References Cited in the file of this patent UNITED STATES PATENTS 816,299 Clauberg Mar. 27, 1906 1,252,996 Bryant Jan. 8, 1918 1,353,603 Malby Sept. 21, 1920 1,704,591 Conner Mar. 5, 1929 1,755,726 Conill Apr. 22, 1930 1,822,379 Scully Sept. 8, 1931 1,864,995 Frost June 22, 1932 1,894,553 Dudew Ian. 17, 1933 1,991,404 Merriman Feb. 19, 1935 1,992,038 Muros Feb. 19, 1935 2,335,536 Reynolds Nov. 30, 1943 2,465,924 Pross Mar. 29, 1949 2,698,995 Anastasia Jan. 11, 1955 2,803,874 Obolensky Aug. 27, 1957 2,848,807 Shnitzlr et a1. Aug. 26, 1958 2,898,676 Guardino Aug, 11, 1959