US2111217A - Safety razor - Google Patents

Description

Mrh 15, 1938. 1 v J. G. LAWRENCE v 2,111,217

SAFETY RAZOR Filed May 20, 1935 2 Sheets-fSheet 1 l l v l March 15,1938. f J. G. LAWRENCE 2,111,217

SAFETY RAZOR Filed May 2o, 1935 2 sh'eetsfsheet 2 l `hard substances.

Patented Mar. 15., 1938 UNITED STATES PATENT oFFlcE y11 claims.

The invention 'relates to the typfeof razor which a.l short and usually ii'exible blade is .clamped between a bed plate having a serratedy or toothed margin projecting` beyond the razor blade forl protecting the face of theuser, and a` movable clamping plateor head. In razors of this type the sharp edge of the blade is exceedingly delicate and almost certain to -be -dulled, to' some extent, by contact with any hard or semi- The principal object of the present invention, is-to provide a blade and holder therefor which 'willpermit the aprlicationgof the blad'" to the holder, and its vrem val therefrom, without danger'oi` having the edge or edges brought in contact with any part of the holder. Other features of improvement willappear in the following descriptlonfy The invention, as to some of itsvfeatures, may 2Q be variously embodied. 'Iwoforms of the holder Y are' hereinafter described and illustratedV in the accompanying drawings: in which Fig, lis an elevation of one form of theirnproved razor, anv end ofthe head being in view;

Fig. .2 is a sectional viewon the line 2-2 of F18'. 1^;

Figs. 3 and 4 are sectional details on the lines 3 3 and 4-4. respectively,l of Fig. 2

Fig. 5 is a -detail elevation of the head of the razor from thee same point oi' View as Fig. 1, the clamping elements beingshownin open position to permit the removal of theblade;

Fig. 6 is anelevation showing the head of then section on the line II-II'of The blaue 'is usaly with. eitherm the mus trated formsof holder, and capable of usewith other forms thereof, is in the form, of a thin plate. of exible elastic material, the general shape of which is oblong lrectangular.' The margins of its longer sides It, I1,/ are brought to `cutting edges. slotted from one end, as shown at I8, the slot extending somewhat beyond half the length of Fig. 9 is av view in perspective of the blade re.-

The blade ,is centrally longitudinally the blade and its margins being flanged approximately at right angles to the face of the bladebut slightlyinclined toward the slot, as shown at I9, I9. Beyond the slot I8, preferably to the farther end oi the blade, there .is a bowed rib 2f. 5 the side walls of whichmay 4be continuations of l the anges I9, I9.I The slot I8 permits the introduction and removal of therme@v longitudi-` nally `into and from a suitable holder, the anges I9, is, and rib 20 being adapted to engage suit- 19 able'guldes forpositioning and facilitatingv the binding of ^the' blade within the parts of the holder. g Y

` The holder comprises a suitable handle bar 2I, into one end of Iwhich is inserted a` tubular 16 shank 22, which is secured in place by a tight iltting pin 23. A'longitudinallymovable spindle" 24, lwhich carries the head of the razor,I projects through the shank 22, :and is slotted, as shown atv 25, to receive the pin 23, and its inner end is 20 reduced in diameter and threaded,v as shown at 26, to engage a tubularnut 21, which projects beyondl the handle 2I,`a knuried annulus//Z being fitted upon the outer end of this Vnut and bearing against the outer end of the handle ele;v 25

ment 2l. The nut 21 is provided near its inner endewith an annular shoulder 29,J which bears against an inwardly facing complementary shoulder formed in the handle ban/the described construction providing for free turning of the nut but 30 preventing its longitudinal movement.

The head of the holder comprises a clamping plate 30, which may be formed integrally with the spindle 24, as most plainly shown in Fig.' 3.

This clamping plate is provided with' av central 35.

longitudinal rib on its linner face, to which the spindle 24 is. integrally connected,as shown in Fig. v8. The portion 3 I of thisv rib which extends in one directionfrom the spindle 24V fits within th slot Il oi the blade I5, and snugly between' 40 the flanges I3, I9 securely stabilizing the blade `against Vlateral movement. Theportion 32`of this rib at the opposite side of the spindleA is of such size-and shape that it snugly engages within the rib 20 of the bladewhen the head is closed to 45 clamp the blade, as shown in Figs. 1, 2, and 3, against a suitable bed.

'A Preferably, though not necessarily, this bed is composed of two movable' plates 33 and 34,

mounted on a pivot pln'35,set through the` spln- 50 bed plates 33, 34, are drawn down'against and binding the blade i firmly against -their upper,

faces. e

When the head is opened by the outward'thrlst of the spindle 24, the parts are broughttto the positions shown4 in Iiiig.` 5, the vbed plates 33, 34, being caused to turn on the pi 35 by the en gagement with them of a pair o` hooked ,lingers 3l, 3l, which extend from the end of the shank 22 into pockets formed in the underfaces of these plates, and engage over shoulders 39, 40, formed therein.

In the construction shown in Figs. and 11, these hooked fingers are dispensed with, an expanding spring 4I being coiled about the pin 35, its endreacting against the two hed plates to cause them to turn on the pivot pin as the head is opened.

The bed plates 33, 34, are provided with a series 4of teeth 44 along their outer margins, over and face of the user, supporting shoulders at the ends of the plates, however, being provided, as indicated' at 45, 4. yIn order to protect the corners of the blade, as well as the face of the user, from accidental injury, each of' the bed plates is provided adjacent its end with an upstanding boss, as shown at 42, 43, against which the corners of the blade engage. These bosses are, of course. of very slight elevation, as they are not intended to project above the exposed face of the blade.

The blade is entered into the headlongitudinally, as suggested in Fig. '7, its slotted end being in advance. The inner end. of the rib 20. reaches the spindle 24 when the blade is fully entered. This spindle being now Idrawn down into the handle by the turning of the nut 21, the parts of the head are brought together to firmly clamp the blade between the plate 30 and the bed plates 33, 34, and the ribs'3l, 32, insure its correct positioning. The blade may be removed by opening the head and turning it approximately vertical, the rib 32 being downward, whereupon the blade will drop by gravity. In these operations ,there'is hardly a possibility of the edges of the against relative turning movement about the axis of the handle by their pivotal connection, andA against such movement together by the pin 23 and by the engagement of the hubs `for the pivot pin l5 in a 'transverse slot in the end of the-shankl 22, when the' head is closed to clampv the blade.

I claim as my invention- 1. Anoblong razor blade having La longitudin cutting edge, -a longitudinally open slot extendingirom= one end, and spring flanges anking the slot and inclined inwardly with reference thereto. 2. A blade for safetyrazors, the bladebeing oblong in form and having an open slot from one end through more than one-half its length' and@ having a bowed rib beyond and in line with the f slot, the inner end of the rib constituting an abutment for engaging a suitable-stop on a' holder and .1 a positioning rib.

vside walls of the rib being adapted to engage 3. A blade for safety razors, said blade being oblong in form and having an open slot from one i end on its median line through more than onehalf its length, and a pair of inwardly inclined flanges at the margin ofthe slot and having a bowed rib beyond and in line with the slot, substantially as andv for the purpose-described.

4. In a safety razor, a tubular handle, a longitudinally movable spindle within and projecting beyond the handle, a pair of bed plates pivotally mounted on the spindle and having faces for seating against the end of the handle whenin serv- `ice position, a clamping plate mounted on the end of the spindle and having on its inner face a centrally locatedlongitudinal rib, a blade centrally slotted from one end to receive the rib, and means for moving the spindle longitudinally to clamp theblade between the last-named plate and the bed plates.

5. In a safety razor, a tubular handle, a longitudinally movable spindle within and projecting beyond the handle, a pair of bed plates pivotally mounted on the spindle and having faces for seating against the end of the handle when in service position, a clamping plate mounted on the end of the spindle and having on its inner face a centrally locatedlongitudinal rib, a blade centrally slotted from one end to receive the rib and .having a longitudinal bowed portion in line with the slot, and means for moving the spindle longitudinally to clamp the blade between the .lastnamed plate and the bed plates.

6. In a safety razor, a tubular handle, a longitudinally movable Yspindle projecting from the handle and now rotatable relatively theretoja clamping plate rigidly mounted on the end of the spindle, a pair of bed plates pivotally attached to the spindle and engageable with the end of the handle as the spindle is drawn thereinto, whereby the clamping plate and bed plates are brought into blade binding relation and means for moving thespindle.

7. In a safety razor, a suitable handle, a longitudinally movable spindleprojecting from the handle, a clamping plate rigidly mounted on the end of the spindle, a pair of 4bed plates pivotally mounted on the spindle and engageable with the end of the handle as the spindle is drawnthereinto, whereby the clamping plate and bed plates are brought into blade binding relation, and means adapted `to turn the bed plates on `their pivot as the spindle is extended to separate them from the compression plate.

8.A In a safety razona suitable handle, a longi` tudinally movable spindle projecting from the handle, a clamping plate rigidlymounted on the end' of the spindle, a pair of bed plates pivotally mounted on the spindle and engageable with `the end of the handle as the spindle is drawn thereinto, whereby the clamping plate and bed plates are ,brought into "blade binding relation, and means adapted to cause the bed plates to turn on their pivot away from the compression plate as the spindle is extended.'

9.'. In a safety razor, a suitable handle, a 1ongitudinally movable spindle projecting fromfthe handle, a clampingplate rigidly mounted on the end of the spindle, a pair of bed plates pivotally mounted on the spindle and engageable with the end of the handle as the spindle is drawn thereinto, whereby the clamping plate and bed plates. l

, are brought into blade binding relation', and a' z -pair of fingers projecting from thehandle and f gitudinally movable spindle projecting from the handle, a clamping plate rigidly mounted on the end ofthe spindle, a pair of bed plates pivotally mounted on the spindle and engageable with the fend of the handle as the spindle is drawn thereinto, whereby the clamping plate and bed plates are brought into blade binding relation, and af spring adapted to urge the bed plates to turn on l their pivot as the spindle is extended.

11. In a safety razor, in combination, a handle, an extensible spindle projecting from the handle, a blade clamping plate carried by the spindle and having a transversely concave inner surface, a iiexible blade adapted to seat against the concave face of the plate, and a pair of bed plates pivotally mounted at the end of the handle and movable about their pivots by the relative movements of i the handle and spindle to clamp the blade to the plate. i

- JOHN G. LAWRENCE.

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