US2361410A - Safety razor - Google Patents

Safety razor Download PDF

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Publication number
US2361410A
US2361410A US515349A US51534943A US2361410A US 2361410 A US2361410 A US 2361410A US 515349 A US515349 A US 515349A US 51534943 A US51534943 A US 51534943A US 2361410 A US2361410 A US 2361410A
Authority
US
United States
Prior art keywords
cap
guard
blade
members
razor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US515349A
Other languages
English (en)
Inventor
Muros Joseph
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Co LLC
Original Assignee
Gillette Safety Razor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE461806D priority Critical patent/BE461806A/xx
Application filed by Gillette Safety Razor Co filed Critical Gillette Safety Razor Co
Priority to US515349A priority patent/US2361410A/en
Application granted granted Critical
Publication of US2361410A publication Critical patent/US2361410A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/18—Safety razors with one or more blades arranged transversely to the handle involving blades with two cutting edges

Definitions

  • This invention relates to safety razors of the type in which a thin steel blade is flexed for shaving between cooperating blade-clamping members, asin the well-known Gillette type of against walls of their aperturesand the difference in edge exposure between opposite ends of the blade on the same side of the razor may-amount to several one-thousandths of an inch.
  • This dissafety razor. 5 placement may be sufficient to render the razor
  • the cap and guard members of such safety dangerous to the user or it may merely make its razors are provided respectively with correspondshaving efficiency variable, but in any case it iming projections and apertures designed usually to pairs-the desired precision of the razor as a shav- 'locate the blade accurately in shaving position ing instrument.
  • the cap is twisted to any turing the cap and guard members so that the degree with respect to the guard the edge exrib or projection of one and the corresponding posure at diagonal corners of the blade will be slot or aperture of the other are permanently disexcessive in one case and scant in the other.
  • posed at an angle which will compensate for the 'An'object of the present invention is to provide relative twisting movement to which the two parts a safety razor'so constructed and arranged that are subjected in the clamping operation.
  • This accurate parallelism of'the edges of the cap and may be accomplished for example by inclining guard members will be established and mainthe slot of the guard several degrees from the tain'ed when these members are clamped together geometrical longitudinal'axis of the guard which, upon a blade. of course, is parallel to the line of the teeth or -Inmanufacturing safety razors as heretofore side edges of the guard.
  • Fig. 2 is a plan view of the razor on the same scale as seen from the top, portions of the cap being shown as broken away;
  • Fig. 3 is a view in cross-section on the line IIIIII of Fig. 2, the blade being omitted in both views.
  • the guard member In of the illustrated razor is rectangular in outlineand providedalong each longitudinal edge with a series 'of guard teeth ll. Its blade-engaging face is generally convex in transverse curvature and includes parallel fulcrum shoulders l2 over which the blade is flexed when clamped for shaving.
  • the guard member is provided with a central longitudinal slot [3 and this, as shown in Fig. 2, is not parallel to the longitudinal axis of the guard member comprises the cap [5, this being also rectangular outline but somewhat "i'iarrower than the guard.
  • Its blade-engaging face is transversely curved and its parallel-edges are so disposed as to engage an interposed-blade behind its parallel cutting edges and flex it over the fulcrum shoulders 12' of the "guard.
  • the cap is provided with abladeloc'ating rib l6 arranged to fit into the slot 13 of th guard. member with a clearance tolerance of about .003.
  • a reeniorcing lug or projection I1 is provided at each of the cap corners.
  • the cap is also provided with a threaded central 'stem 18 which passes freely throu'gh'the aperture I4 of-ithe guard member l and is receivedin' the threaded upper end of the'liandlel9 of the razor.
  • the rib I6 coincides "with-the longitudinal'axis of the cap l and is disposed in parallel relation with both of its outer edges.
  • the blade has been omitted for the sake of clearness but its positionbetween'tlie guard it and the cap member or'tnei11ustratedberichty razor will be It “is, “of course, longitudinally 'slotted'tb'receive'the rib'lB, aperture'd for the passage o ftli e'stem l8 and notched at its corners'to clearthe'lugs l1.
  • the walls of the slot l3 in the guard act to gauge the rib I6 of the cap so as to establish exact parallelism of the critical edges or surfaces of the two blade-clampin members, they permit the user to release slightly the clamping pressure of the cap on the blade, if this should become desirable in order toincrease the edge exposure of the blade for the current shaving operation, all without any disturbance to the correct positions of the clamping members.
  • the spring pressure of theinterposed blade tends to retain the cap in the position to which it has been moved in the final clamping rotation of the handle, and it is only when substantially all clamping pressure is removed that the capis permitted to leave this predetermined position-in the razor.
  • a safety razor having cooperating bladeclamping members with outer parallel surfaces which determine the edge exposure of a blade interposed between them, and rotatable means for clamping said members together, one memher having a projecting configuration parallel to its outer edges, and the other having 'a corresponding recessed configuration disposed 'ata slight angle to its outer edges.
  • a safety razor having cooperating bladeclamping members with outer edges shaped to determine the edge exposure or a blade interposed between them, and rotatable means for clamping said members, the said members having corresponding projections and recesses varying in dimensions by a predetermined tolerance clearance and the axis of the projections in one member being ang'ularly displaced with reference to the axi of the recesses of the other member when the two members are disposed with their outer edges in parallel relation.
  • a safety razor having cooperatin cap and guard members, one provided with a slot and the other with a rib to be received in said slot with-clearance and to locate one member with respect to the other, the axis of the rib being parallel to the axis of one member'and the axis of the slot being disposedata slight :angleto the axis of theother member. 7
  • a safety razor having cooperating cap and guard members,-e'a'ch with meansmaking' contact with each-other to locate the said members in parallel relation-the means onone'meniber being disposed parallel to the axis ofthe member whereon it isl'o'c'at'ed and the'meanson the other member being disposed at aslightangle to its axis.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
US515349A 1943-12-23 1943-12-23 Safety razor Expired - Lifetime US2361410A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE461806D BE461806A (en)) 1943-12-23
US515349A US2361410A (en) 1943-12-23 1943-12-23 Safety razor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US515349A US2361410A (en) 1943-12-23 1943-12-23 Safety razor

Publications (1)

Publication Number Publication Date
US2361410A true US2361410A (en) 1944-10-31

Family

ID=24050980

Family Applications (1)

Application Number Title Priority Date Filing Date
US515349A Expired - Lifetime US2361410A (en) 1943-12-23 1943-12-23 Safety razor

Country Status (2)

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US (1) US2361410A (en))
BE (1) BE461806A (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596372A (en) * 1946-09-20 1952-05-13 John W Clark Razor blade holder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596372A (en) * 1946-09-20 1952-05-13 John W Clark Razor blade holder

Also Published As

Publication number Publication date
BE461806A (en))

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