US1888747A

US1888747A - Razor

Info

Publication number: US1888747A
Application number: US607905A
Authority: US
Inventors: Swan Harry
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-04-28
Filing date: 1932-04-28
Publication date: 1932-11-22
Anticipated expiration: 1949-11-22
Also published as: BE395921A; DE630494C; GB401190A; FR754703A

Description

NOV. 22, 1932. I W 1,388,747

RAZOR Filed April 28, 1932 3 Sheets-Sheet 1 INVENTOR ATTORNEY Nov. 22, 1932. H. SWAN 1,888,747

\ RAZOR Filed April 28, 1932 3 Sheets-Sheet 26 W10 3/, 5, gr;

INVENTOR Ai'ToRNEY Y Nov.- 22, 1932. H. SWAN f RAZ-OR Filed April 28, 1932 s Sheets-Sheet 5 INVENTORY A13 ATTORNEY Patented Nov. 22 1932 iran s'r rss'rA raNr- OFFICE:

may SWAALOF NEW roman. Y.

' :aAzoR Application filed April 28,

My invention relates to the razor art and .especially to'razors of the safety type.

'macap In my copending application Serial N 0. 563,273 filed September 17, 1931,.there are disclosed several forms of safety razor Whereis permanently secured to a relatlve- I I -ly stationary portion of the razor. A relatype for moving the cap into and out of blade This , Fig. 1 is an elevational tivly rotatable portion of the handle is arranged to engage the cap for holding it in The present inblade clamping position.

a razor of this vention provides means in clamping-position by rotating the relatively rotatableportion of the handle. In this way the razor may be disassembled by simply turning the rotatable portionoftlie handle. rotation first disconnects the handle from the cap and then causes the cap to be I rotated about its hinged connection withthe The razor: :may be assembled again by turning the ro-' stationary portion of the razor.,

Icross -section, of a portion of the device shown in Fig. 1, but different position; Fig. 5 is a top view, partially in cross-sec. tion, of a portion'of the device shown in Fig.4; Fig. 6 is an elevational view, partially in with certain parts in a cross-section, of another embodiment of my invention; a

Fig. 7 is a cross-sectional view, taken on.

the line 7-7 of Fig. 6;

Fig. 8 is an end view of the device shown in F12. 6;

' e'rence character connection with the accompanying drawings,"

1932. Serial No. 607,905.

Fig. 9 is a cross-sectional view takenon the line9-9 of Fig. 6;

Fig. 10 is an elevational view,.partially in cross-section, of the device shown in Fig. 6,

but with certain of the parts in a different position ,1 g

Fig. 11 is an elevational view, partially in cross-section, of still another embodiment of my invention;

7 Fig. 12 is a cross-sectional view taken on the line 1212 of Fig. 11;

' Fig. 13 is a cross-sectional view'taken on the line '1313 of Fig. 11;

Fig. 14 is an elevational view partially in cross-section, of the device shown in Fig. 11, but with certain of the parts in a different position; and 1 Fig. 15 is a cross-sectional view taken on the line 15-15 of-Fig. 14'.

Referring more particularly to Fig. 1, ref- 10 designates generally ,a

handle which comprises a first part 11 and a second part. 12,

parts

11 and 12 being rotatable relative to each other. Part- 11 is con venie'ntlymade in the form of a tube while part 12'is in the form of a rod or shaft extending through tube 11.

Parts

11 and 12 are ment. A knob 14 is secured to one end of "shaft '12 and is soqlocated that it may be turned while tube ll is held stationary.

provided with a set of screw threads 13 so. that the two parts have threadedengage-- Rigidly secured to the endof tube 11 is a 7 base member 15. Base member 15 is formed itha' witha groove or channel 16 for slidably supporting a rack 17. Rack 17 is formed set of teeth18 on its lower face and another setof teeth 19 on its inner face.

An arm 20 is secured to the underside of base member 15 adjacent to, one. end thereof.v

Arm 20 is formed with an opening therethrough to receive a pin 21. Rigidly'secured to pin 21 'is forked end 22 .of an arm 23. A

gear 40 is also rigidly secured'to pin 21, or ma be secured directly to one prong of thefor edend 22.- The other end of'arm 23 is secured to am 24. Cap 24 is provided with aperturesv or. s tions 26 carried .jecti'ons 26' serve to position. the cap, and,

ots25 which receive projecby the base member 15. Probe explained later.

' between guard member 32 and cap 24.

screw threads 30 adapted to engage threads 29 on pin 28. This end of shaft 12 is also provided with an integral collar or flange 31.

A guard member 32.is provided with openings '33 for receiving rojections 26. The ard member is pre erably formed with guard teeth 34 and has a central opening through which pin 28 is adapted to pass.

Opening 35 is small enough so that flange 31 on shaft 12 may not pass therethrough, but will bear against the under side of guard member 32.

Located on shaft 12 below flange '31 are I 5 several teeth 36. These teeth preferably do not extend all the way around the shaft in the form of a complete gear for reasons to These teeth are adapted to engage teeth 19 on rack 17. A razor blade '37 is adapted to be clam ed razor blade is formed with suitable apertures the razor for; any purpose, such-as to'receive projections 26 and in 28. The

- blade is preferably made of flexible material.

The operation of the razor above described is as follows:

Assume that the razor is in assembled position with a blade clamped in 'place between the cap and the guard, as is shown in Figs. 1 through 3. If it is desired to disassemble and dry the blade or to replace the blade, tubular part 11 of the handle 10 is held one hand'while shaft 12 is rotated by turn ing knob 14 with the other hand as though to unscrew it. This rotation causes shaft 12 to move downwardly with respect to part 11, f

' as viewed in Fig. 1. i This'movement also causes shaft 12 to be unscrewed from pin '28. Inasmuch as the pitch of

threads

13 and 29 and 30 is the same, the shaft 11 may be turned with respect to part 11 and pin 28 at the same time.

The teeth 36 on shaft 12 are so located that,

at the instant shaft 12 becomes disengaged from pin 28, teeth 36 are somewhat higher than teeth 19 on rack 17 andthe last tooth,

designated 36a has just passed the teeth 19, the shaftbeing turned in a clockwise direction as seenin Figs. 2 and 5. Further rotation of shaft .12 causes itto move down still further and by the time the first tooth, designated 36?) has come around to teeth 19, 113-18 down far enough to engage one of these teeth. Further rotation of shaft 12 and teeth to clean 36 causes rack 17 to move to the left, as viewed in Fig. 1. "This movement causes gear 40, which engages teeth 18 on rackj17, to rotate in a counter-clockwise as gear 40 is rigidly secured to arm 23, either directly or through pin 21, cap 24 is caused the position shown in Fig. 4. In this position blade 37 and guard member 32 may be removed.

When it is desired to reassemble the razor, guard position on base member 15 and knob 14 is turned in the opposite direction; that is as to screw knob 14 onto part 11. Teeth 36 being still in engagement with teeth 19 on rack 17, the rack is caused to move to the right and rotates gear 40 in a clockwise direction, as illustrated. This causes cap 24 to be rotated into blade clamping position. When cap 24 reaches this position tooth 36b disengages from teeth 19 and further rotation of shaft 12 causes threads 30 to engage threads 29 on the pin 28. By the time tooth 36a has come around to teeth 19,.the shaft 12 has been raised sufiiciently so that tooth 36a is above the teeth19 and hence does not en-.

gage them.- As knob 14 is turned, flange 31 direction. Inasmuch 32 and blade 37 are placed inpropeu to rotate with respect to base member .15 to is raised with the shaft 12 and forces guard member 32 upwardly and thus the blade 37 is clamped between the guard member and cap 24. Inasmuch as cap 24 is in engagement with shaft 12 by means of

threads

29 and 30, the cap cannot be displaced by guard mem ber 32 and blade 37 being forced up against it.

In Figs. 6thr'ough 10, thereis illustrated a somewhat modified embodlment of m invention. The razor comprising this em odi-.

ment consists of a handle 10 made up of a tubular part 11 and a shaft 12. Secured to "one end of part 11-.is a basemember 15. Base a rotatable shaft 42 member 15 supports which is provided with a bevelled gear 43 at its inner. end and another bevelled gear 44 at its outer end. A bevelled gear 45 meshes with gear 44 and is rigidly secured to pin 21 which is journalled in arms 41 secured to or integral with base member 15. The forked end 22'of arm'23 is also rigidly secured to pin 21. Cap 24, which is rigidly secured to arm 23 in this, embodiment is not provided with openings therethrough, but is formed with recesses 46 in its under face. These recesses are adapted to receive projections 26 Which,in this embodiment, are not as high as were the projections shown in the first embodiment. The central under side of cap 24 is provided with a pin 28 on which are formed threads 29 adapted to engage threads 30.-

formed in the hollow end of shaft 12. Shaft 12 and tubular part 11 havethreaded engagement in this embodiment in the same manner as shown at 13 in Fig: 1.

A guard member 32 provided with apex tures 33 is carried) by base member 15.

blade 37 is adapted to be clamped between i is' provided with a knob 14 guard member 32 and cap 24.

' A flange 31 is secured to the upper endof shaft 12 andbears against the under side of guard 32. On the under side of flange 31; is located a plurality'of bevelgear teeth 47. Gear teeth 47 do not form a complete. gear but comprise onlya few teeth, as was the casewith teeth 36 in the first embodiment.

The operation of is as follows: I Assuming the razor to be in assembled position, as is shown in Fig. 6, rotation: of shaft the device just described 12 causes the shaft to move downwardly, as

indicated by the arrow A, with respectto tubular part 11 and with respect to pin 28., When the shaft has been turned far enough so that

threads

29 and 30 are disengaged,

teeth 47 engage teeth on bevelled gear 43'and cause shaft.42 to rotate. This rotation is transmitted throughbevelled gears 44 and to pin 21 which causes cap 24' to rotate with respectv to base member 15. --The cap is rotated to the position shown in Fig. 10. In this'position the blade and guard may be removed. 'When' it is desired to reassemble the razor, the blade and guard are placed in positionon base member 15 and shaft 12 is turned in the opposite direction to that indicated by the arrow A. Inasmuch as teeth 47 arein engagement with bevelled gear 43 this causes rotation of shaft 42 and cap 24 is ro tated until it comes to rest on-projections 26. At this point teeth 47 disengage from.

bevelled gear 43 and further rotation of shaft Th 12-

causes threads

29 and 30 to engage. Flange 31 forces guard 32and blade -37 upwardly against cap 24, whichv is held from rotating dueto the fact that

threads

29 and 30 are in engagement.

the upper. end of shaft 12 for the same reason that teeth 36 did not extend all the, way around. Hence, shaft 12' may be turned a portion of a turn and thus moved downwardly, between the time when; last tooth 47 a clears gear 43 and the time when first tooth 476 comes into engagement with ear 43. This allows for an appreciable over apping before contact of tooth 47 b with the teeth of gear 43. If teeth 47 were disposed-all the way around shaft 12, they would at first just touch the ends of the teeth on gear 43 and might slip over them before the shaft had turned sufficiently to bring them down far enough to ac-. tually engage the teeth. .This would cause unnecessary wear and the gears might possiblyibecome jammed. s v

Afurther embodiment of my invention is' illustrated in Figs; 11 through 15. In this embodiment the handle comprises 'a tubular part 11 and a shaft 12. One end of shaft 12 and the parts are formed with a set of threads 13 adapted 'to en gage eachother. fAnother set-of threads 50 forkedend 22 the forked end 22 is formed on the parts Hand 12. Set of threads 50 has a greater pitch than does set 13.

These threads are so spaced on parts 11 and 12'that the threads of set 50 come into engage- 1 ment immediately after the threads of set 13 have become disengaged.- The result isthat when the shaft 12 is being turned so as to'lower it withrespect to tubular part 11, the shaft moves downwardly a certain distance .with relation to part 11 for each turn of the'handle while threads 13 are in engagement, and moves a greater distance for each turn when threads 50 come into engagement. Obviously, threads 13 and threads 50 should not be in engagement at the same timedue to the fact that they have a different pitch.

A base member 15 is rigidly secured to one end of tubular part 11. Base member'15is formed with a slot 16 inwhichis slidably positioned a rack 17. Rack 17 is provided with a recess 51. One end of rack. 17; is

formed with an'internal cam surface 52 which preferably has the outline disclosed in Figs.

11 and 14. Base member 15 is formed with an arm 20 having "a circular opening therethrough which receives a an arm 23 which is rigidly secured to a cap 24. Qnelof the prongs of of'arin 23 is provided with pin 21. Pin 21 supports the a pin 53 which is adapted to contact the cam surface 52 of rack 17 Cap-14 is formed with recesses 25 for receiving projections 26 carried by base member 15.

e cap is also provided with acentrally located pin 28 having threads 29 formed thereon. Threads 29 are threads 30 formed in the 12.

Threads

29 and 30 have the same pitch as adapted to engage do' the threads comprising theset 13., Teeth 47 do notextend all the way around The upper end of shaft 12 is formed with-a flange31. -Located below flange 31 is a single tooth 54 which is adapted to en age recess 51 formedin rack117. .In place 0 the single recess 51 and single. tooth 54 several teeth 17, as shown in the embodiment illustrated in Figs. 1' through 5.

he various parts are spaced that

threads

29 and 30 become disengaged at the same time that the threads making up the set 13 become disengaged. In

during, the time while the 50 are in en a ement the g g 120- tubular end of shaft so ro ortioned and I to be in assembled posi- 1 The distance which the 11c i could be formed on both the shaft12 and rack ing up set 13. being unscrewed from pin At the same time, shaft 12 is 28. When the shaft has been turned sufficiently so that the threads of the set 13 become disengaged,

threads

29 and 30 also become disengaged. Further rotation of shaft 12 causes the threads comprising the set to become engaged. At this point tooth54 is in the position shown in Fig. 15, that is, it has just passed over rack 17. When the shaft 12 is rotated from this position with threads 50 in engagement, the shaft moves downwardly further than it would had threads 13 remained in engagement, due to the greater pitch of threads 50. Hence, by the time tooth 54 is turned to the position shown in Fig. 12, Where it is about to engage recess 51 in rack 17, the tooth is further down than it would have been if threads 50 of the greater pitch had not been employed. Hence, tooth .54 has better engagement than it otherwise would have had, and better engagement than does the first tooth 36?; shown, in Fig. 2.

Furtherrotation of shaft 12 from the position shown in Fig. 12 causes rack 17 to move to the left, as viewed in Fig. 11. This movement causes cam surface 52 to be pressed against pin 53. This causes pin 53 to move to the left and, inasmuch as it is mounted on arm 23which is pivoted on pin 21, cap 24 is rotated to the position shown in Fig. 14. In this position the blade 37 andithe guard member 32 may be removed.

When it is desired to reassemble the razor, guard 32 and blade 37 are'put in place on base member 15 and shaft 12 is rotated in the oppositedirection. This causes rack 17 to move to the right, as viewed in Fig. 14. This causes the lower left hand portion of the cam surface 52 to press against pin 53 with the result that the pin slides up on this surface and causes arm 23 and cap 24 to rotate in a clockwise direction about pin 21 until it comes to. rest on shoulders 27 of projections 26. 1

At this point tooth 54 leaves recess 51 and "by the time it has come back to the position shown in Fig. 15, threads 50 have become disgaged. Further rotation of the shaft 12 engaged and threads 13 have become engaged. At the same time that threads 13 becomeengaged,

threads

29 and 30 also become encauses it to move upwardlywith respect to tubular part 11 and flange 31 forces guard member 32 and blade 37 upwardly against cap 24. thus clamping the blade between the cap and the guard member.

J It will be apparent that the arrangement of

threads

13 and 50 disclosed in the embodiment illustrated in Figs .,11 through 15 may. be employed with equal advantage in the other two embodiments illustrated.

It will be noted that, in each of the embodiments, the hinge comprising arm 20, pin 21 and arm 23 is located underneath the base member 15. This hinge could be located beyond the end of the base member, that is v directly below the vertical part of arm 23. 7

However, an advantage is gained by locating it in the position shown. This advantage is that the cap is better balanced the nearer on one side of the hinge as on the other and.

very little forcewould be required to rotate the cap. By locating the hinge some distance inwardly from the .end of the cap, the cap is balanced to some extent. Besides this,

hinge so located is protected from injury and results inthe razor having a neater appearance.

While the guard in the embodiments illustrated is not of the reversibletype, it is obvious that a reversible guard, such as is'disclosed in my above identified copending application, could be employed without in any vention. r

While I have shown and described three embodiments of my invention it is to be understood that they are for illustrative purthe way departing from the spirit of this inposes only and are not. to be" considered as limiting the scope of my invention, which is to be 'determined'by the appended claims viewed in the light of the prior art. What I claim is:

1.,In a safety razor'of her, a cap rotatably mounted with respect to said member, a guard having an operative I the double edged fleiible blade type, a cap supporting mem-- with the cap rotating means and with said.

cap for first rotati g the cap into blade clamping position with espect to said guard and then holding the cap in said position.

2. In a safety razor of the-double'edge flexible blade type, a base member, a cap pivoted at one end tot-he base member, a

cap rotating means, and 'a member engageable SUCCGSSIVBlY with the cap and the caprotating I means.

3.- In a razor, a handle comprlsinga first tively rotatable, a base member secured to said first part, a cap hinged to said basememher, and cap rot tingmeansmne of said parts upon rotation being enga eable successively first part, a cap hinged to said base member, a motion transmitting-member mova'bly supported by said base member, means on said guard between the base member and the cap,

part anda second part, said parts being rela-- I second part for engaging andmoving said motion transmitting member upon relative rotation of said parts, means secured to said cap for engaging said motion transmitting member so that movement thereof causes rotation of said cap with respect to said base 'member, and means on said cap for direct engagement with said second part.

5. In a razor, a handle comprising'a first part and a second part, said parts being relatively rotatable, a base member secured to said first part, a cap hinged to said basememher, a guard having guard teethon opposite edges supported by said base member, a double edged blade adapted to be clamped between said cap and said guard, a rack slidably supported by said base member, said rack having one or more teeth thereon, said second part having one or more teeth formed thereon for engagement with said rack, and means secured to said cap for engaging said rack so that movement of said rack causes rotation of said cap with respect to said base member. i

6. In a razor, a handle comprising a first part and a second part, said parts being relatively rotatable, a base member secured to said first part, a cap hinged to said base member,

a rack slidably supported by said base member, said rack having one or. more teeth formed thereon, said second part having one.

or more teeth formed thereon for engagement Wlth' sa1d rack, sa1d rack having a cam sur: face, and means secured to sa1d cap fo'rcontacting said cam surface so that movement of said rack causes rotation of said spect to sa1d base member.

7. In a razor,-a handle comprising a first cap with repart and-a second part, said parts being relatively rotatable, a base member secured to said first part, a cap hinged to said base-member, a rack slidably supported by said base member, said rack having one or more teeth formed thereon, said second part having one or more teeth formed thereon for engagement with said rack, said rack being formed with an internal cam surface, and means on said cap for contacting said cam' surface so that movement of said rack in one direction causes rotation of said cap in one direction with respect to said base member and movement of said rack in the opposite direction causes rotation of said cap in the opposite direction.

8. In a razor, a handle comprising a first part and a second part, said parts being rela tively rotatable, a base member. secured to said first part, a cap rotatably secured to said base member,

ber, 'a double edged blade adapted to be clamped between said cap and said guard,'a gear secured to said cap at the axis of rotation thereof, a rack slidably supported by said base member,

part and a second second a guard having guard teeth on opposite edges supported by 'said' base memsaid rack having one or more tatably secured to said teeth on said rack, and said second part having teeth formed thereon for engagement with teeth on said rack. 1

I 9. In af'razor, a handle comprising afirst part, said parts being relatively rotatable, a base member secured to said first part, a cap rotat'ably secured to said base member, a gear secured to said cap at the axis of rotation thereof, said second part having teeth formed shaft rotatably carried by said base memher, a gear secured to said shaft and meshing with the gear secured to the cap, anda gear secured to said shaft for engagement with the teeth on said second part.

10. In a razor, a handle comprising a first part having threads formed thereon and a second part having threads for engagement with the first-mentioned threads, 21 base member secured to said first part, a caprot'atl5 thereon, a

ably secured to said base member, a pin se- I cured to said cap and having thread-s formed thereon, one end of said second part being formed with threads for engaging the threads onv said pin, extent of the threads on with respect to the threads on said parts which engage with each-other that said'second part may be disengaged from said pin while still engaged with said first part, and

the location and axial said pin being such means operable upon rotation of said secformed thereon, one end of said second part being formed with threads for engaging the threads on said pin, the location and ingsuch with respect to the threads on said parts which engage with each other thatsaid part may be disengaged from said pin while still engaged with said first part,

a motion transmitting member movably su ported by said base member, means on sa1d second part for engaging and moving said motion transmitting member upon rotation of said second part while disengaged'from said pin, and means on said cap motion transmitting member so that movement thereof causes rotation of said cap with respect to said basemember.

12. In a razor, a handle comprising a first for engaging said with "respect to sand base secured to said cap and having threads,

' axial extent of thethreads on said pin bepart having threads formed thereon and a second part having threads for engagement with the first-mentioned threads, -a base member securedto said first part, a'cap robase member, a pin ond part may secured to said cap and having threads formed thereon, one end of said second part being formed-with threads for engaging the threads on said pin, the location and axial extent of the threads on said pin being such with respect to the threads on said parts with each other that said secwhich engage be disengaged from said pin I while still engaged with said first part, a

rack slidably supported by said base member and having one or more teeth, said second part having one or more teeth and being positioned so as to engage said rackwhen sald second part is disengaged from said pin, and means on said cap for engaging said rack so that movement of said rack causes rotation of said cap with respect to said base member.

13. In a razor, a handle comprising a first part having threads formed thereon and-a second part having with threads for engaging the threads on said pin, the location and axial extent of the threads on said pin being such with respect to the threads on said parts which engage with each other that said second part may be disengaged-from said pin while still engaged with said first part, a rack slidably supported by said base member and having one or more said second part having one or more teeth and being positioned so as to engage the teeth on said rack when said second part is disengaged from said pin, said rack having a cam surface, and means secured to said cap for contacting said cam surface so that movement of said-rack causes rotation of -said cap with respect to said base member.

14. In a razor, a handle comprising a first part having threads formed thereon and a second part having threads for engagement with the first-mentioned threads, a base member secured to said first part, acap rotatably secured to said base member, a pin secured to threads for engaging said cap and havingthreads formed thereon, one end of said second part being formed with the threads on said pin, the location and axial extent of the threads on said pin being such with respect to the threads on said parts which engage with each other that said second partmay be disengagd from said pin while still engaged with said first part, a rack slidably supported by saidbase member and having one or more teeth, said second part having one or more teeth and being positioned so as to engage saidrack when said second part is disengaged from said pin, said rack having an internal 1 cam surface, and means on said cap for con- I tacting said cam surface so that movementof said rackin/one direction causes rotation of the location other that said second part may be said cap in one direction with respect to said base'member and movement of said rack in the opposite direction causes rotation of said cap in the opposite direction.

15. Ina razor, a part having threads formed thereon and a second part having threads for engagement 1 with the first-mentioned threads, a base mem ber secured to said first part, a cap rotatably secured to said base member, a pin secured .to said cap and having threads formed thereon, one end of said second part being formed with threads for engaging the threads on said pin, the location and axial extent of the threads. on said pin being such with respect to the threads on said parts which engage witheach other that said second part may bedisengaged from said pin while still engaged with said first part, a gear secured to said cap at the axis of rotation thereof, a rack slidably supported by said base member and having one 1 or more teeth, said gear having engagement with said rack, and said second part having handle comprising a first as toengage said rack when said second part is disengaged from said pin.

16. In a razor, a handle comprising a first part having threads formed thereon and a second part having threads for engagement with the first-mentioned threads, abase member secured to said first part, a cap rotatably secured to said base member, a pin secured to said cap and having threadsformed thereon, one end of said second part being formed with threads for engaging the threads on said pin, and axial extent of the threads on said pin being such with respect to the threads on said parts'which engage with each disengaged from said pin while still engaged with said first part, a gear secured to said cap at the axis of rotation thereof, a shaft rotatably carried by saidbase member, a gear secured to said shaft and meshing with the gear on said cap, another gear secured to said shaft, and said second part having teeth and being movable so as to engage the last-mentioned gear when said second part is disengaged from'said pin. v

' 17 In a razor, a handle comprising a first part and a second part, two sets of threads on said parts for providing threaded engagement between the two parts, the pitch of one set being different than the pitch of the other set, said sets being so spaced that, upon relative rotation of the two parts, the threads of one set come into engagement after the threads of the other set have become disengaged, a base member secured to said first part, a cap rotatably secured to said base member, a pin secured to said cap and hav- I formedwith threads for engaging the threads gage at the same time, and means operable upon rotation of'said second part when the on said parts for threads havingthelarger pitch are interengaged for rotating said cap with respect to said base member.

18. In a razor, a handle comprising a first part and a second part,'two sets of threads ment between the two parts, the pitch of one set being different than the pitch ofthe other set, said sets being so spaced that, upon'relative rotation of the two parts, the threads of one set come into engagement after the threads of the other set have become disengaged, a base member secured to said first part, a cap rotatably secured 'to said base member, a pin secured to said cap and having formed thereon threads of the same pitch as the threads of the set having the smaller pitch, formed with threads for engaging the threads on said pin, all of the threads of the smaller pitch being so spaced as to engage and disengage at the same time, a motion transmitting member movably supported by said base member, gaging and moving said motion transmitting member upon rotation of said-second part when the threads having the larger pitch are interengaged, and means on said cap for engaging said motion transmitting member so that movement thereof causes rotation of said cap withrespect to said base member.

19. In a razor, a handle comprising a first "part and a second part, two sets of threads on said parts for providing threaded engagef ment between the two parts, the pitch of one set being different than the pitch of the other set,'said sets being so spaced that, upon relative rotation of the two parts, the threads of one set come into threads of the other .set have become disengaged, a base member secured to said first part, a cap rotatably secured to said base member, a pin secured to said cap and having formed thereon threads of the same pitch as the threads of theset having the smaller pitch,- one end of said second part being formed with threads for engaging the threads on said pin, all of the threads of the smaller pitch being so spaced as to engage and disengage at the same time, a rack slidably supported by said base member, said rack having one or more teeth thereon, said second part having one or more teeth formed thereon and so located as to engage said rack when the threads having the larger pitch are interengaged, and means on said cap for engaging said raclt so that movement of said rack causes rotation of said cap with respect to said base member.

20. In a razor, a handle comprising a first providing threaded engageone end of said second part being means on' said second part for enengagement after the on said parts for providing threaded engage- 4 ment between the two parts, the pitch of one set-being difierent than the pitch of the other set,said sets being so spaced that, uponrelative rotation of the two parts, the threads of one set come having,

one or more teeth thereon, said second part having one or more teeth formed thereon and so located as to engage said rack when the threads having the larger-pitch are interengaged, said rack being formed with a cam surface, and means on said cap for contacting said cam surface-so that movement of said rack causes rotation of said cap withrespect to said base member. 1

21. In a safety razor, pivoted at one end to the base member, a guard between the base member and the cap, a double edged flexible blade adapted to be clamped between the guard and thecap, cap-- rotating means, and a member engageable a base member, a cap I successively with the cap rotating means and with the cap for first rotating the cap into blade clamping position and then holding the cap in said position. I

22. In a razor, a handle comprising a first part and a second part, said parts being relatively rotatable, a base member secured to said first-part, a cap hinged to said base member, a rack slidably supported by said base member, saidrack having'one or more teeth thereon, said second part having one or more teeth formed thereon for engagement with said rack, means secured to said cap for en- 7 a in said rack so that movement of said 55 a a: a

rack causes rotation of said cap with respect to said base member, and means on said cap .for direct engagement withsaid second part.

23. In a razor, a handle comprising a first part and a second part, 832d parts being re1atively rotatable, a base member secured to said first part, a cap hinged to said base member, a rack slidablv supported by said base member, said rack having one or more teeth formed thereon, said second part having one or more'teeth'formed thereon for engagement. with said rack, said rack having a cam sufface, means secured to said cap for contactingsaid cam surface so that movement of said rack causes rotation of said-cap with respect to said base member, and means on said 'cap for direct engagement with said second part.

a I into engagement after, the threads of the'other set have become disen said guard toward said cap forclamping a 24;. In a ra'zor, a handle comprising a first part and a second part, said parts being relacap rotatably secured to said base'member, a gear secured to said cap at the axis of rotation thereof, a rack slidably supported by said base member, said rack having one or more teeth, said gear having engagement with teeth on said rack, said second part having teeth formed thereon for engagement with teeth on said rack, and means .base member secured to and a guard-supported by said base member, said second part beingadapted upon rotation to move said guard toward said cap for clamping ablade therebetween;

In testimony whereof, I have affixed my signature.

HARRY SWAN.

on said cap for direct engagement with said second part.

25. In a razor, a handle comprising a first part and a second part, said parts being relatively rotatable, 'a base member secured to said first part, a cap rotatably secured to said base member, a gear secured to said cap at the axis of rotation thereof, said second part having teeth formed thereon, a shaft rotatably carried by said base member, a gear secured to said shaft and meshing with the gear secured to the cap, a gear secured to said shaft for engagement with the teeth on said second part, and means on said cap for direct engagement'with said second part. v k

26. In a"razor, a handle comprising a first part and a second part, said parts being relatively rotatable, said first part, a cap, mounting said cap on said base member, said hinge being located beneath, and inwardly from one end of, said base member, and a guard supported by said base member, said second part being adapted upon rotation to move said guard toward said cap for clamping a. blade therebetween.

a 'base member secured to 3 a hinge for rotatably 27 In a razor, a-handle comprising a first I part and a second part, said parts being relatively rotatable, a base member secured to said first part, a cap, a hin e for rotatably se member, said supported by said base member, and cap rotating means, said second part being en able with said cap rotating means and said guard for rotating'said cap and moving blade between said guard and'said cap.

28. In a razor, a handle comprising a first part and a second part, said parts being rela tively rotatable, a base member secured to said first part, a cap, a hinge for rotatably mounting said cap on said base member, said hinge being locatedben'eath, and. inwardly a guard ageith

. from one end of,-said,base member, a motion I transmitting member movably supported by said base member, means on said second part for engaging and moving said motion transv mittingmember upon relative rotation of said parts, means secured to said cap for engaging said motion transmitting member so that. movement thereof causes rotation 'of said cap with respect to said base member,