US2661530A

US2661530A - Magazine safety razor

Info

Publication number: US2661530A
Application number: US230011A
Authority: US
Inventors: John F Cavanagh
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-06-05
Filing date: 1951-06-05
Publication date: 1953-12-08
Anticipated expiration: 1970-12-08

Description

Dec. 8. 1953 J. F. CAVANAGH 2,661,530

MAGAZINE SAFETY RAZOR Filed June 5, 1951 2 Sheets-Sheet 1 Fig.3 uf 25 INVENTOR.

93? 8 irao JL Patented Dec. 8, 1953 UNITED STATES FATENT OFFICE 12 Claims.

This invention relates to improvements in safety razors and has for its objects:

First, to provide a magazine razor holding a plurality of razor blades, with incorporated means for instantly replacing a used blade.

Second, a magazine razor incorporating means for storing used razor blades.

Third, a magazine razor wherein manual contact with blades is obviated.

Fourth, a safety razor of economical construction embodying the foregoing features.

With these objects in view, certain other novel features and advantages will be explained as the specification proceeds.

In the accompanying drawings:

Fig. 1 is an outside front elevation of the razor.

Fig. 2 is an outside side elevation of the razor.

Fig. 3 is an enlarged end view, showing a blade in shaving position.

Fig. 4 is a cross sectional view through the lower conveyor drum, on line 44 of Fig. 6.

Fig. 5 is an enlarged elevation, with the casing in section, showing the chassis retracted.

Fig. 6 is a view similar to Fig. 5, but with the chassis in normal position.

Fig. 7 is a cross sectional view, taken on line of Fig. 5.

Fig. 8 is a plan view of an enlarged portion of the blade conveyor.

Fig. 9 is an enlarged sectional detail taken on line 99, of Fig. 8.

At present there is an insistent demand for a safety razor wherein a used blade may be readily replaced by a fresh one.

To meet this demand several widely used brands provide a blade package with incorporated means for sliding a blade from the package into shaving position in the razor. In many instances there is no provision for preventing the discarded blade from becoming a hazard, especially to children.

In my improved razor, the advantages of unitary construction preclude manual handling of individual blades, several months supply of blades being enclosed in a locked casing.

The construction is such that the razor may be produced so economically as to be expendable, as a unit, when the supply of blades has been used in shaving.

Attention is called to the important advantage of provision for re-use of the entire supply of blades should the user find himself temporarily removed from a source of supply for new razors.

This latter advantage together with the foregoing features make this razor highly suitable for use by our armed forces.

Referring to the drawings, I0 is the body portion of a casing. H is a telescoping cover, adapted to fit tightly over and be inseparably attached to said body portion by indents, or other commonly utilized means, not shown.

Within the casing ll], II, is a chassis l2, consisting of a pair of similar spaced sides I3 and M, shown in section in Fig, 4 and Fig. 7.

Rotatably mounted on pins l5, at each end of said chassis l2, are upper conveyor drum I6 and lower conveyor drum II, for a purpose about to be explained.

The overlapping sides of easing body It and casing cover I, are so shaped as to provide slots l8, best shown in Fig. 2, for the purpose of receiving the ends of pins l5, thereby providing for a predetermined amount of guided chassis displacement.

Referring to Fig. 4 and Fig. 8, I9 is one of a plurality of single edge razor blades, provided at each end with a clip 2|], adapted to be compressed around the end of blade l9, after flexible cable 2|v has been passed between the lips of said clip 20, as shown. The compressing operation securely locks blades l9 to cable 2|.

By utilizing two strands of cable in the foregoing manner an endless band 22 of flexibly connected, accurately spaced razor blades may be produced, as shown in Fig. 5 and Fig. 6.

Such a band is adaptable to production automatic machines.

Referring to Fig. 5, Fig. 6, and Fig. '7, it will be seen that conveyor drums l6 and I! are provided with facets 23, contacting the blades of band 22, and nests 24, for clips 20.

The distance between conveyor drums l1 and I8 is adapted toprovide the correct degree of band tension when endless band 22 is mounted on said drums I! and I8.

In mounting band. 22 on chassis |2, the correct length of band assembly with free cable at each end is first provided. 7

Referring to Fig. 8, 25 is a cable connector, provided at each end with bifurcated portions, forming cable retainers, adapted to be compressed around the ends of cables 2|, as shown in Fig. 9.

The band assembly is mounted upon drums l1 and I8, and the free cable ends are positioned in the cable retainers of cable connector 25, as shown in Fig. 8, and the foregoing cable retainer portions of cable connector 25 are compressed around cable 2|.

The protruding cable ends are then clipped flush with the ends of cable connector 25, when the chassis sub-assembly is complete and ready to be inclosed by easing members In and II.

Referring to Fig. 5 and Fig. 6, 26 and 2'! are the two links of a toggle, tied together by pivot 28, as shown.

The toggle link 26 is pivoted on casing body II] by pin-.=2.9;. while toggle link 21 :is. pivoted-to chassis,l2-.by ;pin 30,-.as shown in? Fig. 7.

A slot 3?, in casing body Hi, accommodates

toggle links

26 and 21 in their released position.

Projection 3|, on toggle link 26, is provided with a formed end 32, which acts as a -stop 'for the swing of said toggle link 26, in its locked-position and also provides means for operating by thumb nail engagement.

It will be seen that the said toggle links 26,;and 21 function to cause chassis I2, to slide within casing 10, ii, the predetermined distance represented by the length of ,slots 18,; and thatrxa powerful thrust, is exerted upon chassis 12, as

pins

28, 29, and 30, become aligned.

.It will also be seen thatthe characteristic selflockir g action. of toggle linkage is taken ,ad-

vantage of to hold chassis l2 normally in the position, indicated in Fig. 6.

(Referring to Fig. 3 and Fig. 5, it will be seen that casing ,body is provided with resilientdip 33, which serves to, clamp, a razor blade against its corresponding facet on upper conveyor drum 16,,when chassis l2,is. forced upward throughthe action of

toggle links

26 and 21.

Casing cover, II, is, also.,.provided with a re- ,silient lip. 34,-. whichnservesto clampwthe razor blade adjacent to the above-mentioned clamped crazornloladeiagainst itsicorresponding, facet. on conveyor drumjfi.

The angular relationship of adjacent ,liacets on, conveyor, drum -l6, are suchuthatythe .back ,.edgecof any. bladeinband, 22, will function as a guard .Ior, thev adjacent cutting, edge of a neighboring blade in the v operationof .shaving.

; Fig. 5,shows a resilientpawl 35, riveted ,to casingibody 10, with its ,free end adapted toengage the clips 20, of band 22,,andserve ,to index ,Said

i band ,.22, when chassisretracts ,;through "the manipulation of toggle links ,ZBMancL 21.

Assuming that ,all parts, are .in normal position as showniin liigr 6, and that. a ,fresh razonblade is required, it is simply ,necessaryito-movetoggle link 26, into position indicateduin Eig.'.,5,,..and

:;then; return said link, 26, to the normalflposition ,.s hown, in Fig 6.

This operation-,first,retractschassis l2 adistance sufficient to permit-conveyor drum ..l6-,,to

turn 1 with band; 2 2, .free, from: contact with resilient lips 33 and 3E.

giAsi chassis 2 is farther, retracted, V resilient pawl 35 engages a clip 2ll,;. in band- 22, causing said band: 22- ,to .be displaced vtheaexact ,amount .to-insure a fresh-bladebeing positioned under lip 33, and an adjacent. blade-being similarly positioned under lip 34. Returninglinkrmto nor- .mal position causes chassis l2 to be forced v in the. direction of said -,1ips- 33 and lt thereby firmly ,clampinga fresh-blade in .position .for

shaving.

,,'Ihe relationship of lipszfia and 34,,on casing I 10, ll, is suchas toprovideianopening-.36, in i which the razor blades'in band .22 are successiversaid drums; zen-openingsaidxcasingiaadjacent ito'thesperiphery of adrum, said opening adapted to expose a blade edge for shaving action, the

sepacing of said razor blades in said band being suchthat the back edge of any blade constitutes a--guard-for the cutting edge of a ju p -..bla,de when-said juxtaposed blade is in shaving position, and means for successively placing said bla-des-in shaving position with respect to said ,opening in said casing.

2. In an implement for shaving, a casing provided with an openingnear itsen-d, ,a chassis slidably' mounted within said casing, an endless band consisting 'of wpluraiity-bf flexibly connected razor blades, ymeans for displaceably mounting said band. on said chassis; and-means responsive to slidingthe chassis with reference to said casing for moving said band on said chassis to successively, position saidblades at said; opening ir saicl case for the. operation"of'ishating.

3. In an implement for shaving, a chassis provided with conveyor drums; an endlessband comprising flexibly connected single edgerazor blades, means iorndisplaceably mounting ,said band upon said conveyor drums, a casing surrounding said chassis, an openinginsaidcasing adjacent to a conveyor drum,.the spacing ofsaid blades in the band being such that'the. flexing of said band over'the periphery of said 'drurn will present a shaving rel'ationshipbetween .thecutting. edge .01" any blade and the back edge 'ofits juxtaposed, blade. with the latter constituting a guardlforithe cutting .edge v.of the juxtaposed blade.

'14. In aniimplement' for shaving, a casing, provided with an opening atone end, a chassis slidably retained in said casi g; a conveyor drum mounted at each end of said chassis, .an, endless flexible .band incorporating a plurality of blades, means for'dis'placeably retaining said band son said, drums, a clamping element juxtaposed to said opening in said casing,,and meanstforlongitudinally moving. said chassis to cause a blade in said band. to be bound between said clamping element and its corresponding drum.

5. In an implement for shaving, a casingprovided with. an opening at one. end, a chassis longitudinally slidable in said casing, a conveyor: drum mounted at each end'of-said-chassis, amendless bandincorporating aplurality of blades,-nieans 'for-'-displaceably--retaining said band "on said drums, a blade clamping element juxtaposed to said opening in said casing, -and means whereby the longitudinal -movement of said chassis :will automatically release .said' blade: 'clampin ielement, index said endless: bandeand Prestoresaid blade clampingiielement.

. 6. :In:an;implement ion-shaving, 8=1C2L5l11f0- ,videdmit'h an openingv at one;end,,a chassis-longitudinallyislidable, in said casing-1a conveyor drum mounted at each end of said chassis-anendless band-.displaceably; mounted :on; said drums incorporating a plurality-of flexibly connected-razor blades, a .blade clamping element juxtaposed :to vsaid.. op.ening, in. .said ca.sing,.,means ..for. .forcing v.said ,chassistoward said, clampingelementior the purpose of clamping a blade between said clamping element and its corresponding drum, means for indexing said flexible band a predetermined distance, and means whereby the manipulation of a single element will successively cause said chassis to move away from said blade clamping element, index said flexible band, and restore said chassis to clamping relationship with said clamping element.

7. In an implement for shaving, a casing provided with an opening, a chassis slidably retained in said casing, a conveyor drum mounted at each end of said chassis, an endless flexible band incorporating a plurality of blades, means for displaceably mounting said flexible band on said drums, a clamping element juxtaposed to said opening in said casing, a toggle for normally retaining said chassis in predetermined relationship to said clamping element, and means whereby the manipulation of said toggle will cause said chassis to move away from said clam-ping element for the purpose of indexing said flexible band, and restore said chassis to normal relationship to said clamping element.

8. In a implement for shaving, a casing provided with an opening at one end, a chassis longitudinally slidable in said casing, a conveyor drum mounted at each end of said chassis, an endless band incorporating a plurality of blades, means for displaceably retaining said band on said drums, a blade clamping element juxtaposed to said opening in said casing, an element attached to said casing whereby the longitudinal movement of said chassis will cause the said flexible band to be indexed a predetermined distance mith respect to its position on said chassis.

9. In an implement for shaving, a casing provided with an opening at one end, a chassis longitudinally slidable in said casing, a conveyor drum mounted at each end of said chassis, an endless band incorporating a plurality of blades, means for displaceably retaining said band on said drums, a blade clamping element juxtaposed to said opening in said casing, a manually operated member adapted to cause the succession of events represented by release of said blade clamping element, indexing of said endless band and restoration of said blade clamping element.

10. A razor comprising a casing having an opening therein, a chassis slidably mounted in said case, a plurality of flexibly attached blades guided by said chassis, means to advance said blades with reference to said chassis upon reciprocatory sliding movement of the chassis to present a succeeding blade of the plurality to the opening in said case.

11. A razor comprising a casing having an opening therein, a chassis slidably mounted in said case, a plurality of flexibly attached blades guided by said chassis, means to advance said blades with reference to said chassis upon reciprocatory sliding movement of the chassis to present a succeeding blade of the plurality to the opening in said case and means to bind a blade between the chassis and case as the chassis is slid into the casing with the bound blade projecting through said opening.

12. A razor comprising a casing, a chassis mounted in said casing, an endless band consisting of flexibly connected single edge razor blades mounted upon said chassis, an opening in said casing adjacent to one end of said chassis, said opening adapted to expose a blade edge for shaving action, the spacing of said razor blades in said band being such that the back edge of any blade constitutes a guard for the cutting edge of a juxtaposed blade when said juxtaposed blade is in shaving position, and means for successively placing said blades in shaving position with respect to said opening in said casing.

JOHN F. CAVANAGH.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,145,920 Davis Feb. 7, 1939 2,490,775 Borden Dec. 13, 1949