US1069465A

US1069465A - Safety-razor.

Info

Publication number: US1069465A
Application number: US66937512A
Authority: US
Inventors: Arthur James Postans
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-01-04
Filing date: 1912-01-04
Publication date: 1913-08-05
Anticipated expiration: 1930-08-05

Description

A. J. POSTANS.

SAFETY RAZGR.

APPLIOATION FILED JANA, 1912.

LGQA., Patented Aug. 5, 1913.

fn/www); ma l J/q/J J/d W naa* t SAFETY-RAZOR.

Specification of Letters Patent.

ratenteaang. 5,1913.

` Application led January 4, 1912. Serial No. 669,375.

To all whom t may concern:

Be it known that I, JAMES Pos- TANS, a subject of the King of England, residing'at Brentford, in the county of Middlesex, England, have invented certain new and useful Improvements 'in Safety-Razors, of which the following is a specification. `This invention is for improvements in or relating to safety razors and has for its object to provide Aa razor whereof the parts can be easily separated and put together for cleaning and use, and the blade can be readily mounted on a suitable support for stropping or grinding.

It has heretofore" been proposed to con- 'struct safety razors having grooved blades which are entered longitudinally into a slot formed in a cylinder. The cylindrical joints thus formed are then drawn together by a screw stem engaging one and screwing into a socket in the other to hold the blade in position. According to the present invention however, there is employed with a holder provided with a headed draw-down stem, a blade having on it a socket so disposed that in securing the blade to the holder the head of the stem can be entered in the socket by moving one engaging part relatively to the other along a line that is parallel with the edge of the blade.

Conveniently the blade has one socket only and this takes the form of a sleeve disposed with its longitudinal axis parallel'to the edge of the blade the sleeve being open on that side which is toward the holder, such opening being of suiiicient width to permit the neck of the draw-down stem to pass, but narrow enough to hold the head.

In a preferred construction of blade, the socket is placed near the rear portion and the blade has a fiat edge-carrying portion extending to some distance from and formed integral with the sleeve and the cutting edge of the blade is beveled on each side and so positioned relatively to the socket that a line bisecting the angle made between the two bevels will lie within the flat edge-carrying portion of the blade and will be radial to the central axis of the socket. This permits the socket to be u sed for positioning the blade on a grinding or stropping inachine as well as securing it on the holder, thereby both lessening the cost of manufacture and adding to the convenience of stropping. f

lIn the accompanying drawings which illustrate one method of carrying out this invention:-Figur`e l is a perspective view of a razor with the blade attached. Fig. 2 is a perspective view of a razor with the blade shown in dotted lines in the raised position assumed when it is being removed from or placed on the holder, and Fig. 3 is an end view of the blade showing its position on a. grinding or stropping machine.

Like letters indicate like parts throughout the drawings. j

The holder for the blade comprises a handle A thatcarries at one end a table A1. A stem B having a head B1 is mounted obliquely in the holder, the head and part of the stem projecting above the table and the remainder of the stem being accommodated in a socket A2. The socket projects obliquely from the handle A and the stem extends through it at B2. A spiral spring B3 surrounds that portion of the stem which is in the socket A2 and tends always to draw .the stem down so that the head B1 is pulled toward the table A1, but the stem can be pushed in the opposite direction by pressure applied at B2.

The blade C has a cutting edge C1 that is carried by a flat edge-carrying portion form-4 ing an integral extension C2 from a socket or sleeve C3. The sleeve is split or open at C4 on that side which is toward the table A1 when the blade is in use and the extension C2 projects from one edge of the rsleeve and a second extension C51projects from the other edge of the sleeve in such direction that it projects beyond the plane ofthe under surface of the main extension C2 which constitttes the cutting portion of the blade. The socketf'ior sleeve C3 is suiiiciently large to accommodate the head B1 of the stem B, but the open portion C4 is too narrow to permit the head to pass through it. The neck of the stem B, however, can pass this opening and thus, to secure the blade on the holder the head of the stem can be entered in the socket or sleeve C3 by moving one engaging part relatively to the other along a line that i's parallel with the edge of the blade as the longitudinal axis of the sleeve C8 is parallel With the edge C1.

The front edge ofthe table A1 is provided with teeth A3 constituting the usual safety device and at the back-of the teeth a clearance A3* is provided to preventthe accumulation of soap-suds.

Pins Aproject from the table and engage oval orifices B4 in the blade.

The two end teeth A5 at he front of `the table are higher than the others so that the edge of the blade is thereby maintained free of all the teeth except these two to give the necessary cutting clearance.

The rear extension C5 of the blade rests upon al beveled portion A6 at the back of the table A1 and it will be seen that when the blade is brought into place the headed stem pulls it down swinging the blade on the part A6 as a fulcrum so that the edge of the blade is brought 'firmly down upon the front portion of the holder. The pins A4L entering the orifices B4 prevent the blade from being displaced sidewise when on. the hclilder but the blade can be raised clear of t em.

To release the blade the user holds the' vhandle A and with the thumb pushes upon the part B2 of the stem B so that the whole stem is displaced upwardly lifting the blade from the holder. vThe blade thus clears the pins A4 and can then be slid sidewise ofi' the head B1 of the stem. 'Ihe orifices B* are oval because the stem B moves backwardly as well as upwardly when pushed to release the blade and therefore the pins must allou-r the blade to move backwardly relatively to them before it is lifted sufliciently high to clear them.

l The plane in which the main body of the blade, that is the flat edge-carrying portion C2, lies, conveniently forms approxlmately a right angle with the plane in which the extension or stop portion Ci of the blade les.

The socket C3 in addition to constituting a means whereby the blade can be mounted on the holder, provides a convenient device for mo-untin it on a grinding or stropping machine;

facture as well as use aects the cheapness of production.

In Fig. 3 the blade is shown upon a support D that may constitute part of a grinding or stropping machine whereof the grind-- T is is an important feature ask the easy handling of the blade for manu-l edge-carrying portion C2 and be radial to the socket C3 as shown in this figure. When the blade is thus shaped it can be easily ground or stropped and also serves its purpose on the holder to the best advantage.

What I claim as my invention and desireto secure by Letters Patent is l. In a safety razor, a blade provided with an open sleeve disposed with its longitudinal axis parallel to the edge of the blade, the edge-carrying portion of the blade extending from one side of the open sleeve and the blade having an extension from the other side of the open sleeve, such extension projecting beyond the plane of the edge-carrying portion of the blade at an angle thereto and the opening in the sleeve being of reduced width as compared with the internal diameter of they sleeve.

2. In a safety razor the combination ofv a blade, a holder for the blade, and a drawdown stem mounted therein and having a l head that operatesby the draw-down movement of the stemsto clamp the blade against the holder, the blade being provided w1th a socket for the said head in the form of an open sleeve disposed with its longitudinal axis parallel to the edge of the blade and with its opening toward .theholder the said opening being of sufficient width to permit the stem to slide therein in a direction parallel to the edge of the blade, but also suili ciently narrow to retain the head within the said socket, substantially as set forth.

3. In a safety razor,the combination of a blade provided with an open sleeve disposed with its longitudinal axis parallel to the edge of the blade, the edge-carrying portion of the'blade extending from one side of the Vopen sleeve and the blade having an extension from the other side of the open sleeve,

a holder for the blade, `and a draw-down stem mounted ltherein and having a head engaging in the sleeve, the opening in the sleeve being of sufficient width to permit the entrance of the stem but also being sufficient-ly narrow to retainv the head in the sleeve, so that the head can be inserte in the sleeve by relative sliding movement between the head and the blade parallel to the edge of the blade, the said blade extension projecting beyond the plane of the edgecarrying portion of the blade and engaging the surface of the back of the` holder, so that the draw-down action ofthe draw-down stem will turn the ,blade on this surface as a fulcrum and will bring the edge portion of the blade down firmly on the front portion.

'portion integral with and extending a dis- In testimony whereof I have signed my tance from the sleeve and having its free 'name t-o this specification in the presence of edge beveled from both sides and so positwo subscribing witnesses.

tioned relatively t0 the sleeve that a plane ARTHUR JAMES POSTANS. bisecting the two bevels will lie within the i Witnesses:

flat edge-Carrying portion of the blade and l HAROLD H. SIMMONS,

be radial to the central axis of the sleeve. I A. M. HAYWARD.