US1805895A

US1805895A - Safety razor

Info

Publication number: US1805895A
Application number: US268243A
Authority: US
Inventors: Watson Alec Vernon
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-04-22
Filing date: 1928-04-07
Publication date: 1931-05-19
Anticipated expiration: 1948-05-19

Description

May 19, 1931., A. v. WATSON SAFETY .RAzbR Filed April 7, 1928 2 Sheets-Sheet l May 19, 1931.

A. v. WATSON SAFETY RAZOR Filed April 7, 1928 2 Sheets-Sheet 2 PatentedMay 19, 1931 PATENT OFFICE use vna'non WATSON, ST. S, ENGLAND, ASSIGNOB 01" ONE-HALF 1'0- THOMAS ANDERSON DAVIS, OF LONDON, ENGLAND sum: mzoa Application filed April 7, 1928, Serial No. 268,248, and in Great Britain April 22, 1827,.

This invention of improvements in safety razors is concerned with the adaptation of safety razors for insertion bodily into a stropping devicewithout the necessity for removing the blade or altering the condition of the razor parts. In the specification filed with the concurrent patent application, Serial Number 268,244 a stropping device is described of end of the safety razor with the handle broken the reciprocatory carriage type and-the improvements to be descr1 ed in this resent specification are particularly inten ed for t e adaptation of a safety razor for inser-.

tion bodily into the stropping apparatus of the said concurrent patent application.

One object of the invention is to provide the safety razor withmeans whereby it may be disposed with accuracy in supports in the carriage so that the edge of the blade will.

be in, roperrelation to the 'stro on object'is toprovi e the blade A rt with a rockable rocked automatic y from one side of the blade edge to the other during stropping so ing drawings illustrating one examp e of" constructiomin which drawings e V Figure 1 is a lon itudinal sectional elevation of an improve strapping device with a safety razor locked therein in position for stropping, the device beingassumed to be in movement along the strop in the direction of the arrow.

Figure 2 is a plan of Figure 1 but with the strop indicated by chain ines only.

Figure 3 is an elevation as seen from the left hand end of Figure land with thestrop omitted.

Figure 4 is a fra mentary view and similar. to Figure 1, but showing the cradle rocked to a reverse position for stropping so the other side of the edge of the blade when line VIVI of Figure-4.

"3. Wit in the channel isa swinglable cradle guard adapted for being.- a l screw threaded at 20 for screwing into the the collar 23 clamps the c the device is in movement along the strop in the direction of the arrow which is the reverseof that in Figure 1. v Figure 5 is similar to Figure 4 but it shows the cradle in a'locked condition and the razor only partially inserted.

Figure '6 is a transverse section on the Figure 7 is a perspective view of the blade oif.

Figure 8 is a cross section on the line VIII-VIII of Figure 7.

Figure 9 is an end elevation of the razor device in Fi ure 7.

Fi re 10 we plan view of the razor device 1n Figuref7. g

The carriage or holder is a'channel member com rising a base 1 and side walls 2 and comprising

side plates

4 and 5,

t ree rollers

6, 7 and 8 in triangular or staggered disposi-. tion being rotatably mounted on spindles 9,

10 and 11 fixed by their ends in the

plates

4 and 5. The cradle ,is suspended from

pivots

12 and 13 on -the wa1ls2 and 3. The

rollers

7 and 8 are provided with flanges 70 and respectively. A strop 14 is passed alon 'the' channel and trained about the rollers to orm a bight into which the edge of the razor blade 7 is to project. A hollow bead, or bridge mem- 1 her 15 extends across the channel near the rear end, and is formed inthe middle with a slot to. receive a neck 17 formed on the razor handle19 just within a terminal knob or enlargement 18 which can'be seated in the hollow head 15. i

The forward end of the handle 19 is shown thick ortion of a blade 22 which may be of the ho ow ground type but the handle may be riveted to the blade. Between the screw thread 20 and the plain portion of the handle 19, there is formed a collar orenlargement 23. Before screwing the handle into the-blade 22, aclip device 21 is applied to the blade. The. screw threaded end 20 is'passed thropgh a perforation in the clip and screwed into the blade 22,*and when tlfihtly screwed home 'p 21 between itself and the blade 22 As will be seen particuat right angles from the arms and these are for 'supportin the blade guard 28.

As seen in the drawings, the guard 28 is a U-shaped loop or bail having internal dimensions sufiiciently lar e to enable it to swing a'st the edge of the blade from the position igure 1 to the position Figure 4. The upper portions of the limbs of this guard are

widpips

26, 27 into the perforations of the widenened at 29 and 30, Figure 7, to overlap the sides of the blade 22, and such widened portions are provided'with perforations to enable the tangs or

pips

26,27 to pass through. The upper portions of the limbs are bent out of the plane of the loop 28, so that when such upper ortions are more or less fiat against the bla e 22, the loop portion is inclined away from the blade as seen in Figures 1, 5, 8 and 9. In assembling the parts, the clip 21 is engaged with the guard 28 by inserting the tangs or

ed portions

29, 30 and is then applied to the blade 22, the handle 19 being finally screwed into the blade to clamp the clip 21 as above T described. The clip 21 having been secured in position with'accuracy owing to the disposition of its perforations on the screw 20 and to the seating of its flange on the top of the blade, it follows that the tangs or

pips

26, 27 will suspend the uard 28 so that'its bottomtransverse mem er is correctly disposed beneath the edge of the blade and the lower ortions of its side limbs are clear of the lade. Moreover, the pressure of the spring arms 24, 25 a ainst the

upper portions

29, 30 of the limbs eeps such portions fiat against the blade 22 so that the loop portion of the guard is correctly disposed in relation to the edge of the blade for affording the safety razor characteristics. It is to be noted from. Figures 8 and 9 that the tangs or

pips

26, 27

normally extend a little over respective ends of the blade. The above described position of the parts, seen in Figures 8 and 9, is the normal position of the parts during a shaving operation.

The top flange of the clip 21 is formed with

end extensions

31 and 32 which project beyond the ends of the blade 22, as seen clearly in Figure 10, and these extensions are designe to come to rest and seat upon the inner end portions of the

cradle pivots

12 and 13 as shown in Fi ure 6, when the razor is properl V inserted into the channel carriage or ho der. Such insertionis accomplished by holding the razor in a somewhat erect position, introducing the knob 18 into the seating 15 and the neck 17 into the slot 16, and then lowering the razor as about. a pivot until the

extensions

31 and 32 come to rest uon the inner ends of the pivots 12and 13. hen the end of the handle 19 has been engaged in the seating 15 and slot 16 as described, no ap reciable movement of the razor endwise o the 1 pose a pivoted loop orbail-form of catc 33 is adopted. The catch is mounted on

pivot pins

34 and 35 on the'side

walls

2 and 3, and its transverse or arch member is provided with

spring fingers

40, 41 which press on the top flange of the clip 21 on the blade when the catch is moved about its pivots to the bladelocking osition seen in Flgures 1 and 4. The I side lim s of the catch 33 are notched at 36 and 37, so that when the catch 33 is moved about its pivots to a reverse-positionin which it unlocks the razor, the said notches engage with pins or

projections

38, 39 on the cradleand lock the latter in a non-swingable posi' tion as seen in Fi ure 5. Naturally, the eradle must be broug t to the appropriate inter-v mediate position for this latter locking to be efi'ected. v

In operation, the cradle is locked by the catch 33 as just described. The knob 18 on the razor handle 19 is then engaged with the seating 15 and the razor is lowered to bring the

extensions

31 and 32 on to the

pins

12 and 13 as already explained. Figure 5 shows the razor just before it arrives at this position of rest. In view of the dimensions adopted as above explained and further in view of the cradle heing locked immovably in the position shown, the ed e of the blade 22 is bound to enter the bight 1n the strop 14 freely and without possibllity of damage. The'catch 33 is now moved about its pivots to the position seen in Figures 1, 4 and 6 so as to prevent the

extensions

31, 32 from rising from their seating on the

pins

12 and 13. As the top bent over portion of the head 15 prevents the knob 18 from rising'and as endwise movement of the razor is prevented by the en agement of the neck 17 in the slot 16, it will%e seen that the razor is fixedly held on a three point support in very accurate disposition in relation to the strop ing bight. The razor is conveniently store in this condition in the holder when not in use.

en the razor is to be stropped, and assuming it to have been inserted and locked in the carriage or holder as above described, one end of the strop 14 is hooked on to a fixed object, the other end is held to pull the strap taut and the carriage or holder is reciprocated along the strep. Assume the first stroke imparted to the carriage or holder to be in the favourable angle at which the strgp impinges against the edge is to be noted. uring this stroke of the carriage, the guard 28 retains its normal position in relation to the blade 22, the reason bein that'the left hand side of the edge of the blade is normally exposed and is free to be wiped or rubbed by the strop. When this stroke of the carriage is finished, the movement is reversed so that the carriage then moves in the direction of the arrow in igure 4. The reverse pull of the strop causes the cradle to rock leftwardly to the position in Figure 4,so that the top right and portion right hand side of the edge of the blade. Now, the guard 28 would normally prevent contact of the strop with this side of the edge but owing to the method of supporting the guard 28 the latter is freeto be pushed by the flanges of the roller 8 past the blade 22, as shown in Figure 4, so as not to obstruct contact of the strop with the blade. As will be apparent by comparing Figures 1, 4, 8 and 9, the guard 28 when so pushed by the flanges 80 executes a rocking movement about a fulcrum which may be said to be provided by for example, it is quite impossib e for the- I aftercaime the shoulders at the lower ends of the widened

portions

29, 30. Durin this rocking movement of the guard 28, t e tangs or pips 26, 27' remain in engagement and preserve the appropriate dispositionof the guard. As the lower orloop portion of the guard moves past the edge of the blade, the upper portions of the limbs move outwards from the thick

porthe spring arms

24, 25, will return the guard 28 to its normal position. The amplitude of rocking movement of the guard 28 against the a resistance of the

spring arms

24, 25 is relativelysinall so that in no circumstances is it possible, by reasonable effort, to shift the guard to such anextent as dangerously to expose the edge of the blade. Thus, durin shaving,

guard 28 to rock or tilt to an unsafe position.

The construction described is capable of various modifications and refinements without do artin from the invention as herein- ,Iclaim:' I

1. A safety razor adapted for insertion into a reci rocato stropping device 'of-the kind descri d, sai razor comprising a blade,,a

. handle fixed to said blade for interlocking with a support, a clip clamped to said blade by said handle and having projections ex the bight will rub against the ing clamped shaped guard supported by the clip and blade and resilient laterally extending arms a safety ard fulcrumed on one face of sai blade an normally held in safety position to one side of the blade b the enga ment of said arms, said guard eing rocka le on its fulcrum to the oposite side of the blade.

2. A safety razor adapted for insertion into a reciprocatory stropping device of the kind described, said razor com rising a blade, a handle fixed into said blade r interlocking with a support, a clip engaging the blade comprising lateral projections forming supports and having laterally extending resilient arms, and a safety guard having a fulcrum formation rockable against the blade and being normally held in safety osition to one side of the edge of the blade bythe engagement of the resilient arms and rockable on its fulcrum to the opposite side of said edge against the action of said arms.

3. A safety razor adapted for insertion into a reciprocatory stropping device of the kind described, said razor comprising a handle, a blade fixable to said handle, a clip adapted to be clamped between the handle and blade, a guard rockable upon one face of said blade, and elastic means on said clip for supporting said guard on the blade in safety position. n

4. A safety razor device adapted for insertion into a reci rocatory stropping device of the kind described, said razor com rising a handle, a blade fixable to said han e, a clip comprising spring arms and adapted for beetween handle and blade, a U- pressed against said blade by thespring arms, said guard being rockable on said b ads in such manner that the guard loop can swing past the edge of the blade, said spring arms constantly resisting rocking of sald guard in one direction.

5. A safety razor device comprising a blade, a handle fixed into said blade and formed with a terminal projection, a blade clip projecting laterally beyond each end of the blade, a guard extending down'the ends and beneath" the edge of the blade and rockable on the blade from one side of the blade edge to the other and flexible arms on .said clippositively engaged with said guard for supporting the same, said arms constantly ingpeicing said guard. towards one side of said a e. a

6. A safety razor device comprising a handle formed with a terminal rojection, a blade fixable to said handle, a bla e clip clamped by comprising said handle to said blade an spring arms and a flange extending over the back of the blade and be 0nd each end of the latter, projections on t e ends of {the said arms, and a rockabl'e guard comprising perforated limbs with which said projections enga'fi, said arms pressing said limbs against theh dc- I A v i 4 1,eoa,aoc

7. Asafetyrazor comprising a razor blade,

' a handle fixed directly into the blade, a clip clamped to the blade by the handle, spring arms on said clip, a guard rockable agamst the blade and capable of swingin to and fro past the edge thereof, said guar being supported by said clip and constantly pressed towards normal position by the s ring arms, and projecting devices on said chp and handle for sup ortingithe razor.

8. A sa ety razor comprising a hollow ground blade, a blade guard comprising arms rockable against one face of the blade, a clip applied to the thick top of said blade, a handle fixed to said blade and clampin said cli thereon, and flexible arms on sai clip an having ends for engagement with the rockable guard.

9. A safety razor comprising a hollow ground blade, a handle screwed at one end into a surface of said blade and provided at the other endwith locating means adapted for engaging a support, a clip seated on the back of said blade and secured by the screwing in of said handle, and a s ring biased blade guard sup orted by the clip so as to be swingable past t e edge of the blade.

ALEC VERNON WATSON.