US1712086A - Razor - Google Patents

Razor Download PDF

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Publication number
US1712086A
US1712086A US211485A US21148527A US1712086A US 1712086 A US1712086 A US 1712086A US 211485 A US211485 A US 211485A US 21148527 A US21148527 A US 21148527A US 1712086 A US1712086 A US 1712086A
Authority
US
United States
Prior art keywords
guard
blade
razor
projections
guards
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
US211485A
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English (en)
Inventor
William F Little
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.)
Individual
Original Assignee
Individual
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 BE382559D priority Critical patent/BE382559A/xx
Application filed by Individual filed Critical Individual
Priority to US211485A priority patent/US1712086A/en
Application granted granted Critical
Publication of US1712086A publication Critical patent/US1712086A/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
    • B26B21/34—Safety razors with one or more blades arranged transversely to the handle of the type carrying rollers

Definitions

  • My invention relates to improvements in razors of the safety type.
  • the object of the invention is to provide a safety razor which shall shave cleaner
  • I provide a guard for the blade which is movable, by the action of the razor upon the skin, in
  • this movable guard is in the form of a parallel screw, with a rather flat or blunt thread, rotatably mount- 'ed adjacent to the edge of the blade.
  • Fig. 1 is a fragmentary, elevational view of the razor head and part of the handle;
  • Fig. 2 is an enlarged plan view of the razor head as seen from the bottom;
  • Fig. 3 is a transverse central section on the line3-3 of Fig. 2;
  • Fig. 4 is a longitudinal, central section on the line 4--4 of Fig. 2;
  • Fig. 5 is a plan section on the line 5-5 of Fig. 4.
  • Fig. 6 is a fragmentary, sectional view on the line 6-6 of Fig. 2.
  • 1 represents a head plate somewhat cylindrically shaped on its outer surface, which contacts with the face and provided with the usual centrally disposed guide pins 2 on its back. It is also provided with a central, threaded projection 3 for receiving the handle member 4 which is thread ed to cooperate with same to clamp the several parts of the razor together. I preferably plished make use of a very thin flexible blade 5, and the head plate is preferabl concave on its inner surface for receiving t is thin blade.
  • the several parts are ofthe form and have the functions of simi lar parts in the commonly well known razors of this type.
  • a guard member 6 which takes the place of the' usual guard member but which is provided at its two opposite longitudinal edges with movable guards.
  • This guard'member is providedv with holes 7 for recelving the guide pins 2 and a central hole 8 for receiving the central threaded projection 3.
  • the surface of the guard which is opposed to the head is similarly curved and the blade 5 is adapted to be flexed between these two parts when they are properly,
  • the movable guards spoken of., in thefgrm of'my invention illustrated, consist ofscrwlike members 9, one mounted at each longitudinal edge of the guard member 6.' As best shown in Figs. 5 and 6, each of these movable guards is in the form of a rather shallow, square, thread screw 10 with fairly sharp, square edges 11. However,'the extreme edges are removed and the screw thread is made smooth.
  • Each screw guard is rotatably mounted at its ends in bearing projections 12 extending out transversely at the ends of the guard member 6, the mounting being accomby driving bearing pins 13 into the ends of t e screw guards. No hole need be bored through the guard from end to end, but the hole for a pin, 13, need be com arativelyI short.
  • Assembly is thus easy or it involves merely placing a guard between the pair of projections, 12, and then passing the, pin through the hole in the projection .and drivingl the pin into the hole or socket provided in the guard, driving bein necessary because, of course, a friction fit 1s required.
  • the pintles provided by the pins, 13, can be of substantial diameter and a good bearing is provided that results in the free rotation of the roller. No bending of the perforated lugs or projections is thus necessary in assembling the rotatable guards. This is important lbecause the concavo-co ⁇ n vex guard plate, 6,'1nay be a plate of substanor cutting away the same,
  • Such plate, 6, can be made by die-casting. As may best be seen by reference to Fig. 6, the rounding of the edges or corners of the thread results in the wideningof the ⁇ grooves outward between ad jacent'.
  • This extended peripheral area of the thread does not obstruct or prevent the use of the entire cutting edge ofv the blade from end to end as would be the case if fixed guard fingers, as with the ordinary safety razor, were employed because by the threaded guard, the threads are; in effect, shifted laterally of the blade edge and thus it is exposed throughout its length.
  • the bearing projections, 12, are formed at each edge of the concavoconvex guardplate, G, by centrally notching thereby forming a pair of said bearing projections at each edge i of the guard member.
  • the guard member 6 the projections 12 in which the roller is of uniform thickness, and each of the threaded guard members, 9,l is of a diameter slightly less than the thickness of the guard member 6, so that, when centrally mounted in its notch, thereare projectingledges 0f the bearing projections which protect the rotatable guard members from injury duringuse.
  • the screw guards 9 are arranged close to but not in contact with the cuttingedges 14 of the blade 5. In practice this clearance is attaincdby making the guard member 6 slightly thicker 4than the maximum diameter of the sciy ew guards 9 and then when the thin razor blades are clamped tightly against the convex surface of the guard member 6, the proper clearance is provided between the edges of the blade and the guard rollers. It is also to be noted that guards are mounted are the full thickness of the lather as it is removed from the face. In the form shown, the outer edges 6 ofthe guard member 6 are slanted inwardly at a rather sharp angle. This assists in the passage of the lather through the space between the roller and the Wall.
  • the screw guards being freely rotatable, they are rotated in contact with the face as the razor is drawn along in the act of shaving-and the inclination of the screw threads forces the hairs transversely of the edge of the blade vlas the same is advancing upon the hairs.
  • the result is, as has been expressed, the ideal easy cutting action of the slanting or inclined razor movements, and this is attained without any possiblity of cutting the skin as is sometimes done when the slanting cutis attempted with the usual safety razor.
  • the projections 12 are slightly higher than ther guard and in clamping the blade in the holder the end portions of the blade are clamped against said projections, andl consequently the clearance between the screw guard and the edge of the blade is a lixed amount and is such as has been found to' be most effective in operation, being but a few thousandths of an inch.
  • the position of the cutting edges 14 of the blade in reference to the rollers 19 is of considerable importance. These edges 14 should be positioned as shown at the minimum distance from the adjacent surfaces of the rollers. These positions might be .defined as upon lines radial to the outer curved surface of the guard member 6 and extending through the centers of the ,roller guards.
  • edges eX- tend out beyond these lines or fall short thereof, the proper clearance between the edges and the rollers is not provided and the cutting suggest themselves to one razor guard comprising a plate of uniform thickness and having its opposite edges centrally notched to form a pair of bearing projections at each edge, and a cylindrical, externally threaded guard member rotatably mounted centrally between .each pair of these projections.
  • This posi-- modifications thereof will of projections, the diameters of said rotatable guard members being slightly less than the thickness of said. convex late.
  • a safety razor guar comprising a plate having at opposite ends integral solid projections, with alining holes and an externall threaded roller guard situated between such projections and having at its ends pintles thatl enter theholes in the respective projections, the guard having at its end an axial hole to receive an extension of the pintler driven into such hole, pintles and guard turning together.
  • a safety razor guard comprising a plate having at opposite ends projections and a 15 the spaces between adjacent turns of the 20 thread being outwardly ared, and the bottoms of such spaces being Hat and of substantial area.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
US211485A 1927-08-08 1927-08-08 Razor Expired - Lifetime US1712086A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE382559D BE382559A (enrdf_load_stackoverflow) 1927-08-08
US211485A US1712086A (en) 1927-08-08 1927-08-08 Razor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US211485A US1712086A (en) 1927-08-08 1927-08-08 Razor

Publications (1)

Publication Number Publication Date
US1712086A true US1712086A (en) 1929-05-07

Family

ID=22787100

Family Applications (1)

Application Number Title Priority Date Filing Date
US211485A Expired - Lifetime US1712086A (en) 1927-08-08 1927-08-08 Razor

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US (1) US1712086A (enrdf_load_stackoverflow)
BE (1) BE382559A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457590A (en) * 1944-06-21 1948-12-28 William L Mills Safety razor
US2520487A (en) * 1946-02-28 1950-08-29 Ralph G Arey Swinging blade razor
US2710446A (en) * 1952-06-02 1955-06-14 Kamekichi Shibayama Guard for safety razors
US10618187B2 (en) * 2016-11-04 2020-04-14 Donald Jason Milligan Scissor guide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457590A (en) * 1944-06-21 1948-12-28 William L Mills Safety razor
US2520487A (en) * 1946-02-28 1950-08-29 Ralph G Arey Swinging blade razor
US2710446A (en) * 1952-06-02 1955-06-14 Kamekichi Shibayama Guard for safety razors
US10618187B2 (en) * 2016-11-04 2020-04-14 Donald Jason Milligan Scissor guide

Also Published As

Publication number Publication date
BE382559A (enrdf_load_stackoverflow)

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