US2018042A

US2018042A - Safety razor

Info

Publication number: US2018042A
Application number: US666685A
Authority: US
Inventors: Andrew F Thompson
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-04-18
Filing date: 1933-04-18
Publication date: 1935-10-22
Anticipated expiration: 1952-10-22

Description

I (kp-22, '1935. A. F. THOMPSON A2,018,042

SAFETY RAZ OR Filed April 18, 1935 Jh 11615201 f n'ewE'IZwIq/Jsan By Hltnrugz/ Patented Oct. 22, 1935 UNITED STATES PATENT OFFICE 4 Claims.

My invention relates to an improvement in safety razors. Safety razors have become increasingly popular and the many types and variations now on the market indicate the efforts 5 .made to produce a razor that will be inexpensive and yet do away With existing difficulties.

One fundamental requirement of any razor is that it must be of simple construction, one that will permit of rapid assemblage and the equally rapid taking apart of the razor.

Another requirement is that it must be so constructed that the blade may be easily and safely washed and dried because only in this way may the maximum use of the blades be enjoyed.

l5 A closely associated problem is to produce a structure that will not become rusted in the interior.

Razors have long been made to be taken apart and the problem has been recognized as to the r desirability of exposing the blade for cleaning purposes and several attempts have been made to permit the blade to be cleaned Without taking the razor apart. Such attempts resulted in more complicated structures which would not permit the razor to be taken apart easily.

I provide a razor that is an improvement on the types of safety razors now on the market or those previously suggested in that it may be assembled and taken apart more rap-idly and safely than 'any other razor.

is so constructed that the blade may be exposed and handled without the risk of dropping it or of receiving any cuts in handling it and all parts may be thoroughly cleansed and dried.

My razor may be made to be detachably assembled by a bayonet joint which compressibly unites all the parts together. Thus, I amable to do away with telescoping and screw threaded constructions.

-A further feature of my invention is that by a simple operation, the partial rotation of the handle, the guard and the clamping plate may be removed, leaving the blade on the handle in which position it may be safely cleaned.

In the drawing I have shown and in the specication described an embodiment of my invention. Throughout the specification and drawing like reference numerals indicate the corresponding parts, and in the drawing:

Fig. 1 is a View of my razor assembled.

Fig. 2 is a fragmentary view of my razor separated, the parts being in aligned position.

Fig. 3 is a front view of the guard mounted on the handle.

Fig. 4 is a fragmentary sectional view of the At the same time the razor` clamp member and view of a modified form of interlock to be used with the clamp member, and

Fig. 5 is a face View of the clamping disc removed.

For my razor I provide a handle I which may be shaped and designed as desired. At 2 there are provided a pair of stops which position the guard on the handle. Forwardly of the shoulder 3 I provide my handle with a series of lugs or 105i keys which are axially at right angles to the stops 2. These lugs I number in order of their purpose. The lug 4 serves with the shoulder 3 to dene the notch in which the blade 5 is placed.

The lugs at 6 are designed to holdedetachably 155;;

the backing plate or clamp member 'I which with the guard form the head. The lugs 6 may be formed as a single lug and shaped as desired or may be formed separately as shown inFig. 2 to give an increased interlocking compression. In 20h.

cide, the guard 8 will be effectively seated. The 30 guard 8 is provided with projections II.

The blade 5 is of the usual Wafer type and is provided with an aperture shaped similarly to the aperture 9 of the guard 8. Thus, thereis the main aperture I2 and the slots I3. aperture or opening is of handle size forwardly of the shoulder 3. The blade 5 is also provided with a series of relatively small perforations I4 through which the projections II pass to retain the blade and guard in proper position relative 40 to each other.

Because of the fact that the stop 2 and the lugs 4 and 6 are axially at right angles it results that if the stop 2 and the slots I0 coincide the 111g 4 Will retain the blade 5. 45

The backing or clampingmember 'I is formed to receive the lugs or keys 6. The clamping member 1 and the lugs 6 maybe formed to have in-l terengaging cam surfaces. A satisfactory and convenient construction is to provide a recess 50 I6 and flt therein a washer-like member or discl I8 having a smaller aperture or opening I5 with slots or keyways II extending substantially quarterly therefrom with two of said slots being so positioned that when the slots I0 of the guard 55 This 35 8 are aligned with the stops 2 the lugs 6 will be aligned therewith.

The member I8 is tightly fitted and is seated to prevent the lug 4 and the clamping member 'I fitting closely to the blade 5 when the razor is assembled and as shown in Fig. 5 it may be provided with serrations 22 on its inner surface which will provide a cam like interlock with the lugs 6 on the handle I.

'Ihe clamping member is provided with a centrally located pin 20 adapted to enter an opening 2I of the handle I.

I have found that it is not necessary to form the interlock of the handle I and the clamping member I by a cam or the like for the guard 8 and the clamping member 'I are shaped to curve the blade 5 as shown in Fig. l. Because of the resiliency of the blade 5, the blade 5 when so curved serves as a spring to interlock the mernbers securely.

When the guard 8, the blade 5, and the clamping member 'I are aligned or when the guard 8 is positioned on the stops 2, the parts may be compressed together and a slight rotation of the handle I in either direction will interlock the various members and the razor will be ready for use. -So long as the lugs E and the recess I 6 in the clamping member 'I fit tightly enough to hold the blade compressed between the guard and clamp, the spring action of the blade 5 provides'Y an adequate interlock.

To secure the blade 5 in proper position, the clamping member I is provided with indentations I9. The projections I I of the guard 8 pass through the perforations I4 of the blade 5 and enter those Y indentations I9. The projections II, the perfo- Yist.

rations I4, and the indentations I9 may be shaped as desired.

When it is desired to cleanV the razor blade or to insert a new blade the handle I is twisted sufficientlyvto permit the withdrawal of the guard 8 over the stops 2. When so positioned, the clamping member 'I may also be withdrawn because the quarterly slots I1 are shaped to align with the lug 6 when the guard is in position to be withdrawn, leaving the blade on the handle so that it may be safely cleaned. A further'rotation of the handle I in relation to the blade 5 will permit the blade 5 to be removed.V

Certain changes may obviously be made in the structure shown without departing from the' spirit of my invention if within the limits ofthe appended claims.

What I therefore claim and desire to secure by Letters Patent is:

1. A safety razor including a resilient blade, a head comprising a clamp and a guard having coacting faces disposed to maintain exation of said blade when interposed therebetween, said blade, clamp and guard having aligned assemblyV apertures, and a handle adapted to pass through saidrapertures and having guard retaining members, blade retaining members and clamp retaining members, said retaining members being so disposed radially of said handle and said aligned apertures so formedas to permit an interlock of each of said blade, guard and `clamp with its respective retaining members on said handle on suitable rotation thereof, and so that on further rotation of said handle said guard and clamp coacting faces disposed to maintain flexation of 5 said blade when interposed therebetween, said blade, clamp and guard having aligned assembly apertures, and a handle adapted to pass through said apertures, `said handle having a main portion and a reduced portion providing a shoulder. 10 a pair of oppositer radially extending guard retaining stops on said main portion, saidv guard having slots extending laterally from its said aperture to permit passage of said stops there-v through, a lug on said reduced portion of said handle spaced from said shoulder and at right angles to said guard stops to hold said blade on said handle independently of said guard, said blade having slots extending from its said aperture to permit passage of said lug therethrough, clamp engaging members on said handle aligned with said blade lug and adapted to eiect a cam engagement with the 4aperture edges of said clamp, said clamp having slots extending from its said aperture in alignment with said blade g5 slots and other slots in alignment with said guard slots, and of a size to permit the passage therethrough of said clamp engaging members on said handle, a partial rotation of said handle in said apertures causing simultaneous interlocking of said guard, blade and clamp with their respective stops, lug, and engaging members, and a further rotation of said handle bringing said guard and clamp members into alignment with the respective slots in the guard and clamp whereupon the g5:

guard and clamp may be removed from said handle while said blade remains locked .thereon `by said blade retaining lug and shoulder. y

3. A safety razor including a resilient blade, a

head comprising a clamp and a guard having coacting faces disposed to maintain exation of said blade when interposed therebetweemsaid blade, clamp and guard having aligned assembly apertures, and a handle adapted to pass through said apertures, said handle having spaced protuberdetermined movement of said handle, said protuberances and slots in said guard and clamp will register and said guard and clamp may be removed from the handlewhile said blade remains locked thereon. Y

4. A safety razor comprising a blade, a head including guard and clamp members, said blade iV and said members having aligned assembly apertures and a handle to enter said apertures, aligned means on said handle adapted to hold separately said blade and said clamp, members on said handle to retain said guard when not in alignment I with said guard aperture, said clamp aperture being also formed to disengage said means on alignment of said guard retaining members with said guard apertures, whereby .said head members may be removed-to expose said blade.

ANDREW F. THOMPSON.