US1815745A - Safety razor - Google Patents

Safety razor Download PDF

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Publication number
US1815745A
US1815745A US499744A US49974430A US1815745A US 1815745 A US1815745 A US 1815745A US 499744 A US499744 A US 499744A US 49974430 A US49974430 A US 49974430A US 1815745 A US1815745 A US 1815745A
Authority
US
United States
Prior art keywords
blade
cap
razor
corners
guard
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
US499744A
Other languages
English (en)
Inventor
Ralph E Thompson
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27408338&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US1815745(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to NL38679D priority Critical patent/NL38679C/xx
Priority to BE369509D priority patent/BE369509A/xx
Priority to DEG76436D priority patent/DE616774C/de
Priority to FR693929D priority patent/FR693929A/fr
Priority to GB15818/31A priority patent/GB352976A/en
Priority to GB11964/30A priority patent/GB352975A/en
Application filed by Gillette Safety Razor Co filed Critical Gillette Safety Razor Co
Priority to US499744A priority patent/US1815745A/en
Publication of US1815745A publication Critical patent/US1815745A/en
Application granted granted Critical
Priority to US629321A priority patent/US1924262A/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

  • My invention relates to safety razors in which a-thin, flexible and elastic blade, of oblong contour with unsharpened ends and internally apertured to receive positlonmg 5 and clamping means, is removably secured in a holder comprising a guard member adapted to support the blade adjacent to its longitudinal cutting edges and a cap member provided on oppositesides with parallel straight edges which engage the blade adjacent to the longitudinal edges of the latter and flex it transversely on the guard member as a fulcrum during the process of clamping the blade in the holder, so that, when the razor is ready for use, the blade is maintained in -a transversely curved condition and subjected to a pronounced stress, particularly at its longitudinal edge portions.
  • the Gillette razor exemplifies the type of razor which is described above.
  • type of razor will be referred to in this specification and in the appended claims as the Gillette type, which term will imply the entire description contained in the preceding paragraph.
  • the present invention consist in a safety razor having a ca with reinforced corners, a construction w ich is made possible by the novel contour of my 85 blade and serves to minimize the liability of deformation of the cap, thus insuring the preservation of the straightness of its longitudinal edge where it acts upon the blade to flex and position it.
  • the novel safety razor 00 thus characterized and the novel combination of such a razor with the blade of my invention is claimed herein.
  • My invention may be embodied to good advantage, if desired, in a safety razor havin 05 a' guard member provided with a channe un erlying the cutting edge of the blade as the channel provides a spacefor the reception of lugs which may be employed for reinforcing the cap corners, thus insuring that 100 the ln shall not contact with the guard for in sue a case the blade flexing or clamping action of the cap mightbe objectionably limited.- 1
  • Fig. 1 is a view in perspective'of one form of my improved razor.
  • Fig. 2 is a view in perspective of the blade.
  • Fig. 3 is a view in perspective on an enlarged scale showing a portion of the cap with the blade positionedthereon;
  • a Fig. 4 is a view in perspective of'one end of the assembled razor seen from beneath.
  • the blade-holding parts of the razor shown 1n the drawing are in general of stand- 7 operates. with the /guard 12 and is provided with a threaded center stem 19 projecting from its inner face and adapted .to' pass through a corresponding perforation in the guard member 12.
  • the cap is also provided with a pair of blade-locating pins 16 herein.
  • the threaded center stem 19 extends into a hollow handle 18 which is secured at one end to the guard in the center of the latter and a nut 19 adapted to turn freely in the handle 18 and having its inner end internally threaded to engage the stem 19, whereby the parts are clamped together.
  • the longitudinal edges 10 of the cap 15 overhang and are parallel to the fulcrum shoulders 14 of the guard and are located above the channels in position to overlie the cutting edges of the blade, so that when the blade is clamped in the holder the cutting edges are adjustably positioned and held over the channels as described in U. S. Let- I theremoval of the blade from the cap but also to provide enough material between the end perforation 23 and the ends of the blade to prevent cracking of the latter along its center line. In contrast to the standard blade heretofore employed in this type of razor,
  • the reentrant recesses 25 are each bounded internally by a filet or inwardly curved portion, the effect of which is to prevent excesses of concentration of stress at these points when the blade is stressed, and thereby avoid breakage on account 'of such stresses.
  • the cap which is of a distinctive construction made possible by the novel contour of the blade, is provided at each corner with a projection or reinforcing lug. 17. These as herein shown are located on the inner or concaved face of the cap and constitute reinforcements which supply additional strength to the cap at the points where it is most likely to be bent or distorted.
  • the lugs 17 are integral with the cap and'so shaped that they taper inwardly from a maximum thickness at substantially the outer edge ofthe cap and are flush with its ends. The lugs therefore protect and safeguard the straight blade defleeting edges 10 of the cap, thus aflording additional assurance that the portion of the cap blade shall be undistorted and accurate in shape.
  • the lugs are preferably so disposed and proportioned that when theparts of the razor are clamped together they pass into or through the recesses 25 in the corners vof the blades and into the channels of the'guard member 12 but without engaging the latter and without interfering with the cooperative blade-clamping action of the 'cap' and guard.
  • the reinforcing lugs 17 may thus be made thicker and stronger than would otherwise be practical, but if these projections are not thicker than the blade itself or which is critical in its action upon the are differently disposed, the preference or absence of the channels is unimportant so far as the lugs are concerned.
  • Fig. 3 the blade 22 is shown as resting upon the cap 15 in which condition the relative transverse position of the cap and blade. is determined by the action of the bladelocating studs 16 in the apertures of the blade.
  • Thereentrant recesses in the corners of the blade receive the upwardly projecting lugs 17 affording clearance spaces for them, the blade thereby being entirely out of contact with the lugs and uninfluenced in any way by them.
  • the fulcrum shoulders 14 are located within the blade flexing edges 10 of the 'no distortion of the reinforced cap corners is to be anticipated it will be apparent that, even should these become bent. the clearance spaces afforded by the reentrant recesses 25 of the blade will save the blade from being distorted or objcctionably affected in respect to its edge exposure.
  • a safety razor comprising a flexible and elastic blade of substantially oblong contour and internally apertured to receive positioning and clamping means, a guard member adapted to support the blade adjacent. to the cutting edges of the latter, a blade clamping cap provided with parallel longitudinal edges and with reinforced corners, means for positioning the blade between the cap and the guard member, and means for clamping said parts together and simultaneously causing the longitudinal edges of the cap to flex the blade transversely on the guard member as a fulcrum the blade being provided with unsharpened ends and being cut away at each of its corners to such an extent as to span the corresponding reinforced cap corner and provide a clearance space of suflicient area to receive said cap corner if bent toward the guard member, each cap corner being located within the area of a cut away clearance space in the blade and also within the area of the guard and opposite the corners thereof, whereby a cap corner is prevented from exerting pressure on the blade while the latter is being flexed or when clamped and thereby breaking the blade or distorting its cutting edges.
  • a safety razor comprising a flexible and elastic blade of substantially oblong contour and internally apertured to receive positioning and clamping means, a guard member adapted to support the blade. adjacent to the cutting edges of the latter, a blade clamping cap provided with parallel longitudinal edges and reinforcing lugs at its corners, blade positioning projections, and means for clamping the cap and guard membertogether and for causing the longitudinal edges of the cap to flex the blade transversely on the guard member as a fulcrum, the blade being providedwith unsharpened ends and with reentrant recesses located at its corner portions respectively and each extending both longitudinally and transversely of the blade and cap to such an extent as to span the corresponding reinforced cap corner and provide a clearance.
  • each reinforcing corner lug being located within the area of one of said recntrant recesses and also within the area of the guard member and opposite to one corner thereof whereby the cap corner is prevented from exerting pressure on the blade while the latter is being flexed or when clamped and thereby breaking the blade or distorting its cutting edge.
  • a safety razor according to claim 2 in which the guard member is provided with a channel underlying the cutting edge of the blade and the corresponding cap corners and thereby providing space for the reception of the reinforcing lugs on the cap corners without limiting the blade flexing and clamping action of the cap.
  • a safety razor comprising a transversely flexible blade having a longitudinal cutting edge tcrminating at each end in a recess, which recesses constitute clearance spaces to eliminate clamping pressure at such recessed ends, a blade supporting member extending lengthwise beyond the cutting edge of the blade, and a blade-clamping cap having a straight edge engaging that portion of the blade between said recesses to bend substantially the whole blade transversely upon said supporting member and having its corners provided with reinforcing lugs extending in opposed relation to and toward the blade supporting member in the clearance spaces provided by said pressure preventing recesses and terminating in close proximity to said member.
  • a safety razor comprising a flexible blade with longitudinal cutting edges, cap and guard members shaped to maintain the blade in a transversely curved condition between thom, and means for clamping the parts together, said blade having recntrant open areas at the ends of its cutting edge, which open end areas constitute clearance spaces to prevent clamping pressure at the ends of the cutting edges, and the cap member having reinforcing lugsthat project above its bladeshaping surface and which pass into theopen areas of the blade toward the guard member within the area or outline of saidguard member and terminate in close proximity thereto.
  • a safety razor comprising a flexible blade, with longitudinal cutting edges, cap and guard members shaped to maintain the blade in a transversely curved condition beterminate in close proximity thereto.
  • a safety razor comprising a flexible and elastic blade modified to receivepositioning and clamping means, a guard member adapted to support the blade adjacent to a cutting edge of the latter, a blade clamping cap provided with an outer clamping edge and with reinforcing lugs at its corners, means for positioning the blade between .the cap and guard members, and means to clamp said members together and simultaneously causing an outer edge of the cap to flex the blade transversely on the guard member as a fulcrum, the blade being cut awayat each of its corners at a cutting edge thereof to such an extent as to span the corresponding reinforcing lug and provide a clearance space of suflicient a'rea to receive said reinforcing cap lu each lug being.
  • a safety razor comprising a cap memher, a guard member and a flexible blade, said blade having a shaving edge, said members and blade having positioning means for said blade and cooperating surface portions on said members to flex said blade trans- I versely and maintain said blade and the edge thereof in shaving position, in combination with means to draw said members together and maintain said blade i'n transversely fllexed of said members, said reinforcing means ex-- tending transversely of said blade at the ends of its cutting edge portion.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Sawing (AREA)
  • Measuring Fluid Pressure (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Details Of Cutting Devices (AREA)
US499744A 1929-04-25 1930-12-03 Safety razor Expired - Lifetime US1815745A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL38679D NL38679C (enrdf_load_stackoverflow) 1929-04-25
BE369509D BE369509A (enrdf_load_stackoverflow) 1929-04-25
DEG76436D DE616774C (de) 1929-04-25 1929-05-18 Sicherheitsrasierhobel mit biegsamer laenglich-rechteckiger Klinge
GB15818/31A GB352976A (en) 1929-04-25 1930-04-15 Improvements in and relating to safety razors
FR693929D FR693929A (fr) 1929-04-25 1930-04-15 Perfectionnements aux rasoirs de sûreté
GB11964/30A GB352975A (en) 1929-04-25 1930-04-15 Improvements in and relating to safety razors
US499744A US1815745A (en) 1929-04-25 1930-12-03 Safety razor
US629321A US1924262A (en) 1929-04-25 1932-08-18 Safety razor blade

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US35811429A 1929-04-25 1929-04-25
US499744A US1815745A (en) 1929-04-25 1930-12-03 Safety razor
US629321A US1924262A (en) 1929-04-25 1932-08-18 Safety razor blade

Publications (1)

Publication Number Publication Date
US1815745A true US1815745A (en) 1931-07-21

Family

ID=27408338

Family Applications (2)

Application Number Title Priority Date Filing Date
US499744A Expired - Lifetime US1815745A (en) 1929-04-25 1930-12-03 Safety razor
US629321A Expired - Lifetime US1924262A (en) 1929-04-25 1932-08-18 Safety razor blade

Family Applications After (1)

Application Number Title Priority Date Filing Date
US629321A Expired - Lifetime US1924262A (en) 1929-04-25 1932-08-18 Safety razor blade

Country Status (6)

Country Link
US (2) US1815745A (enrdf_load_stackoverflow)
BE (1) BE369509A (enrdf_load_stackoverflow)
DE (1) DE616774C (enrdf_load_stackoverflow)
FR (1) FR693929A (enrdf_load_stackoverflow)
GB (2) GB352976A (enrdf_load_stackoverflow)
NL (1) NL38679C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016037265A1 (en) * 2014-09-12 2016-03-17 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
USD788367S1 (en) 2015-09-11 2017-05-30 Rockwell Razors Corporation Safety razor base plate
US10807256B2 (en) 2014-09-12 2020-10-20 Rockwell Razors Corporation Modular safety razor with adjustable blade angle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101055684B1 (ko) * 2009-02-11 2011-08-09 주식회사 도루코 일체형 면도날 및 이를 이용한 면도기 카트리지

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016037265A1 (en) * 2014-09-12 2016-03-17 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
US9505142B2 (en) 2014-09-12 2016-11-29 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
CN107107357A (zh) * 2014-09-12 2017-08-29 洛克威尔剃须刀公司 刀片角度可调节的模块化安全剃须刀
AU2015316125B2 (en) * 2014-09-12 2018-11-29 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
AU2015316125C1 (en) * 2014-09-12 2019-04-04 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
CN107107357B (zh) * 2014-09-12 2020-04-14 洛克威尔剃须刀公司 刀片角度可调节的模块化安全剃须刀
US10807256B2 (en) 2014-09-12 2020-10-20 Rockwell Razors Corporation Modular safety razor with adjustable blade angle
USD788367S1 (en) 2015-09-11 2017-05-30 Rockwell Razors Corporation Safety razor base plate

Also Published As

Publication number Publication date
NL38679C (enrdf_load_stackoverflow)
GB352976A (en) 1931-07-15
US1924262A (en) 1933-08-29
DE616774C (de) 1935-08-05
GB352975A (en) 1931-07-15
BE369509A (enrdf_load_stackoverflow)
FR693929A (fr) 1930-11-26

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