US2707830A - Holders for safety razor blades - Google Patents

Description

' May 10, 1955 M. A. MccoLL HOLDERS FOR SAFETY RAZOR BLADES Filed Dec. 26, 1950 y frs /a/I y ATTORNEY United States Patent G HLDERS FOR SAFETY RAZGR BLADES Meredith A. McColl, Coronation, Alberta, Canada Application December 26, 1950, Serial No. 202,696

2 Claims. (Cl. Sil- 336) This invention relates to improvements in holders for safety razor blades, the blade being of the single edge type or one which is a halfy portion of an originally double edged type divided longitudinally, and the object ot my invention is to provide a handy sized holder with separable bar-like blade holding members, and with means for securing the blade between these members.

Another object of my invention is to provide a tool which is well adapted for use by watchmakers when sharpening very minute pegs of wood, is used in their repair work, and for many other uses such as ripping cloth and such materials, nail paring, and erasing inks, etc.

The advantage is that this device is of simple construction and may be cheaply made, and is strong and durable, and consists of few parts.

A further advantage is that the blade is readily detachi' able and replaceable, and use is made of old razor blades, and still further that a safety cap is provided as a safeguard against accidental cutting, and may then be conveniently and safely carried in the pocket, and being only the halt` portion of a two-bladed razor blade there is very little danger of cutting ones linger when in use.

A handle encloses the shank portion of the divided blade-embracing plates or forks forming a case, on the top of which a bored cap fits to outwardly complete the holder, the blade keeper plates bifurcating from a single shank, chuck or stem portion thereof which is insertable within the case. The split blade is inserted between these plates and is clamped by suitable screwable means at the opposite bottom end of the case or handle, which means consist of a thumb screw knob.

The shank portion mentioned terminates in a threaded end on which a screw operates for drawing down the holding members into the handle portion against wedging means provided to bring the two blade-embracing plates together for clamping the blade. The wedge shaped jaws provided for clamping are normally divergent through the inherent spring of the material of which they are made, and the screwing action applied draws the wedges together to iirmly grip the inserted blade or portion of a blade.

With these objects and advantages in view this invention consists in the novel features of construction hereinafter described and claimed, and in the drawings accompanying this specification it must be observed that similar numerals refer to similar parts throughout the dilerent views.

Fig. l is a fragmented view of the holder.

Fig. 2 is a detail showing the blade holding plates, with stem and shank, and the ejection spring compressed.

Fig. 3 is a side view, as compared with Fig. 2, of the blade-embracing plates, blade clamping collar, and stem and itsshank in part.

Fig. 4 is an enlarged detail of a portion of one of the keeper plates.

Fig. 5 is an enlarged detail of a portion of the other one of the keeper plates.

Fig. 6 is an enlarged detail of the wedging jaws.

2,707,830 Patented May 1.0, 1.955

Referring to the drawings the letter A indicates generally a razor blade holder, and comprises a pair of separated blade- embracing plates 1 and 2 which form the bifurcated members of the holder extending endwise from a stem portion 3 of the holder A. These plates are of spring material, and are formed to remain separated normally for the insertion therebetween of a half portion B of a razor blade, or a single blade if of single edge type.

The holder stem is removably insertable into an openended tubular handle 4 so hollowed longitudinally as to form a deep socket 5 at least the length of the holder stem. A threaded shank 6 extends from the end of the stem adjacent to the bottom end of the handle 4, and is disposed within that end of handle 4 opposite the cooperating blade holder plates 1 and 2, and in axial alignment with the handle. A socket 7 at this shank-containing end of the handle 4 forming the open end thereof, receives a thumb and iinger screw S internally threaded to screwably engage the threaded shank. This socket 7 is of less diameter than the socket 5 and is in direct communication therewith. The head 9 of this thumb and linger screw is rounded and knurled or may be of any suitable shape for easy turning.

Near the base of each of the blade- clamping plates 1 and 2 is a wedge shaped jaw 10, which pair of jaws are for retracting the said plates 1 and 2 into an annular collar or sleeve 11 inserted into the open top end of the handle 4. By means of turning the screw 8 in the proper direction this retraction is accomplished, and the jaws are separated by turning the screw 8 in an opposite direction.

The sleeve 11 is of such an interior diameter as to lit around the smaller diameter or width of the two jaws when separated, and the jaws increase in diameter or width in an upwardly flaring manner away from the said sleeve to provide the wedging effect as they are induced to enter the sleeve 11 manually.

In order to facilitate the movement of the stem 3 extendedly from its enclosing handle a spring 12 encloses the shank 6, which is held in compression therearound between a shoulder 13 on the stem at the shank end thereof and an annular shoulder 13a formed at the juncture of sockets 5 and 7, on account of the larger and lesser internal diameters thereof respectively. Thus spring 6 is compressed when turning the thumb and iinger screw S for retraction of jaws 10 to grip the blade, and expands to assist the manipulation for release of the blade.

A number of studs 14 protrude from the inner face of the clamping plate 1 which engage opposite recesses 15 in the other clamping plate 2, and the registration of these studs and recesses assures the keeper clamping effect on the blade between the clamping plates.

A cap 16 its removably over the top end of the handle 4 and completely covers the blade and the blade- holding plates 1 and 2. This is a safety precaution as well as a dust guard.

It is realized that many types of razor blade holders have been invented and patented, but my invented device has the advantage of the adaptation of a half portion of a blade in a specifically safe manner, and is of very practical use on account of its single cutting edge exposure in place of the usual double cutting edge type, which is extremely subject to accident on account of these two edges being exposed.

What I claim and desire to secure by Letters Pat-ent:

1. In a razor blade holding device the combination of a pair of razor blade embracing plates, a stem integral with said plates from which they dividedly extend, a half portion :of a whole razor blade divided longitudinally and for placement between said plates, a tubular handle openended top and bottom and with a deep longitudinal socket te contain saidv stern which is ejectable therefrom by manipulation, a threaded shank forming one end portion of the stern and disposed within the bottom end of the handle, an internally threaded thumb and nger screw rotatable in the bottom open end of the handle and screwably associated with said threaded shank for manipulation of the stem and plates reciprocally within the handle, a tapered jaw integral with each of said plates near their common junction with the stem, and a collar or sleeve in the top open end of the handle with which said jaws engage when being retracted therewithin or disengage when being ejected therefrom as manipulated by said rotatable screw to effect the closure and separation of the two plates for securing therebetween or releasing therefrom a part of a razor blade.

2. A safety razor blade holder within a tubular handle, open ended top and bottom, and having a blade-protecting cap, comprising the half portion of a whole razor blade as longitudinally divided, a reciprocal stem with a pair of parallel plates extending from the top end thereof for clamping said blade portion therebetween, studs in one of said plates and recesses in the other of said plates into which said studs register to maintain the proper alignment between said plates, a tapered jaw at one end of each of said plates engaging a collar tted in the top open end of the handle, a threaded thumb and linger screw inserted in the bottom open end of the handle rotatable on and screwably connecting with a threaded shank extending from the end of said stem opposite to said plates for retraction and ejection of said plates when manipulated for respectively clamping and releasing the blade, a shoulder within the tubular handle near its bottom open end, and a spring braced between this shoulder and a shoulder on the stem to springably assist in the ejection of the jaws and plates for release of the blade from the plates, and to keep the thumb and linger screw element within the handle securely.

References Cited in the le of this patent UNITED STATES PATENTS

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