US2856684A - Dry shaver including adjusting collar and releasable locking means therefor - Google Patents

Dry shaver including adjusting collar and releasable locking means therefor Download PDF

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Publication number
US2856684A
US2856684A US621853A US62185356A US2856684A US 2856684 A US2856684 A US 2856684A US 621853 A US621853 A US 621853A US 62185356 A US62185356 A US 62185356A US 2856684 A US2856684 A US 2856684A
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United States
Prior art keywords
dry shaver
guard
adjusting collar
locking means
head
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
US621853A
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English (en)
Inventor
Max W Ammann
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Individual
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Individual
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Publication date
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Application granted granted Critical
Publication of US2856684A publication Critical patent/US2856684A/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
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor

Definitions

  • This invention relates to razors, and more particularly to dry shavers and the like.
  • Dry shavers usually comprise blades which are forced against a guard by springs or the like.
  • the force with which the blades are pressed against the guard does not give the same satisfactory results with hard as well as with soft beards, and a control of this force dependent on the hardness or softness of the beard shaved, has appeared as a desideratum in this art.
  • This demand for control of the blade-guard relationship has been increased due to additional considerations.
  • the springs forcing the blades against the guard show signs of fatigue, and the eifective operating portions or edges of guard and blades begin to get blunt.
  • a restoration of the force with which the blades originally applied on the guard is bound to increase materially the life of the dry shaver and permit extended use prior to sharpening and other repair or parts exchange work.
  • the present invention has as its primary object to obviate the drawbacks discussed above, and to provide a dry shaver with an adjustable blade-guard relationship whereby to adapt the shaver to the beard treated, and to prolong the life of the shaver by compensation for the wear of its springs, blades and guard.
  • the invention contemplates providing a dry shaver including blades mounted on a blade holder below a guard arranged in a head which is axially displaceable relative to the blade holder, with an adjusting collar disposed in the path of the head, for axial displacement relative to the blade holder, whereby to vary the axial position of the head.
  • the mechanical and electrical components of the driving mechanism for the blade holder which are hidden, in the drawing, by the external case 1a, are arranged as usual, in the internal case 1b, the two cases In and 1b forming the housing or casing of the dry shaver.
  • An externally threaded portion 2 is mounted on top of the internal case 1b, and this portion 2 is traversed by the shaft 3 of the blade holder 4.
  • the head 5 is internally threaded and screwed on the portion 2; the guard 6 is mounted, by means of a holding ring 7, in the top of the head 5.
  • the blades 4a carried by the blade holder 4 are forced, as usual, against the bottom surface of the guard 6, by means of springs 412; on rotation of the blade holder 4, these blades slide, under a mild pressure, across the bottom surface of the guard 6.
  • the invention provides an annular adjusting member or collar 8 which is screwed on the portion 2.
  • the collar 8 at itsbottom and remote from the head 5, has an extension 8a formed as a hollow cylinder.
  • the bottom of this extension is serrated to provide notches 8b which are evenly distributed along the entire circumference of the collar extension 8a.
  • these notches are designed to form part of a click-stop arrangement, they could be replaced by bores, projections or similar components of a click-stop system.
  • the extension 8a has a length such that it extends into the space delimited by the cases 1a and 1b, respectively.
  • the internal case 1b mounts, on a pin 9, one end of a spring 10 which is bent outwardly, i. e. toward the case la, and which, further on, abuts against an abutment 11.
  • the free end 10a of the spring 10 is bent off to form a hook-shaped click which is designed to enter one of the notches 8b in the extension 811 of the collar 8, to prevent the same from being turned and thus axially displaced as long as the click 10a remains in engagement with any particular notch.
  • the abutment 11 is a fitting pin which on assembly of the cases 1a and 1b, enters a corresponding opening in the external case 1a.
  • a latch 12 traversing the cases 1a, 1b and abutting against the spring 10 is arranged between the spring mount 9 and the abutment ll, in a manner such that when this latch is pushed inwardly, the free or click end 10a of the spring 10 disengages itself from the notch 8b, thus releasing the adjusting collar 8 which may now be turned to effect an axial displacement thereof.
  • the latch 12 When the cutting characteristics of the dry shaving apparatus require modification, for example due to wear of the blade and guard edges, the latch 12 is pushed in and the adjusting collar 8 is turned in the direction of downward axial displacement, away from the head 5. Once the desired degree of adjustment has been reached, the latch 12 is released so it can return, under the influence of the spring 10, to its position of rest provided the click end 10a is so disposed that it can enter a notch 8b. If this is not the case, the collar 8 must be turned slightly back or forth until the click-top engagement is perfected. Hereafter, the head 5 is screwed downwardly on the portion 2 until its bottom edge again comes to rest on the top edge of the collar 8. This axial displacement of the head in downward direction brings guard 6 into closer proximity and contact with the blades 4a, and thus restores the force with which the blades originally applied against the guard.
  • the adjustment of the cutting characteristics of the dry shaver is equally useful for purposes of compensation for wear, and of adapting these characteristics to the relative hardness of the beard to be shaved.
  • a coupling could be provided whereby temporarily to couple the head 5 with the adjusting collar 8 so that in the course of an adjustment, the portions 5 and 8 would automatically effect the same rotary displacement.
  • the coupling would simply be disengaged so the head 5 could be removed.
  • the axial displacement of the blades relative to the guard could be effected in other ways than by rotary displacement along a helical path, such as a sliding displacement along a straight line, for example.
  • a dry shaver including a rotary blade holder having a shaft, blades mounted on said holder, a head arranged for axial displacement relative to said blade holder, a guard mounted on said head, and above said blade holder, an adjusting collar disposed in the path of the head and arranged for axial displacement relative to said blade holder whereby to variably fix the axial position of the head, a threaded portion traversed by the shaft of the blade holder and mounting the head and the adjusting collar, an axial, hollow cylindrical extension on the side of the adjusting collar remote from the head, a plurality of notches in this extension, and releasable locking means adapted to engage said notches for impeding any displacement of the adjusting collar, the improvement which comprises releasable locking means in the form of a leaf spring having a free end adapted to enter one of said notches, and releasing means for removing said spring end from any notch thus engaged.
  • a dry shaver including an external case, and an abutment, the leaf spring having a base fixed on said case, said spring being bent toward said case and ararnged to abut against said abutment, and the releasing means being provided in the form of a latch traversing said external case and abutting against the spring at a point intermediate its fixed base and said abutment.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US621853A 1955-11-18 1956-11-13 Dry shaver including adjusting collar and releasable locking means therefor Expired - Lifetime US2856684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2856684X 1955-11-18

Publications (1)

Publication Number Publication Date
US2856684A true US2856684A (en) 1958-10-21

Family

ID=4572328

Family Applications (1)

Application Number Title Priority Date Filing Date
US621853A Expired - Lifetime US2856684A (en) 1955-11-18 1956-11-13 Dry shaver including adjusting collar and releasable locking means therefor

Country Status (5)

Country Link
US (1) US2856684A (enrdf_load_stackoverflow)
CH (1) CH335961A (enrdf_load_stackoverflow)
DE (1) DE1010412B (enrdf_load_stackoverflow)
FR (1) FR1160328A (enrdf_load_stackoverflow)
GB (1) GB804558A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413719A (en) * 1965-05-31 1968-12-03 Moser Kuno Electric razor with adjustable cutter
CN115091510A (zh) * 2022-06-25 2022-09-23 中山寰亚刀具有限公司 一种刀头可旋转的剃毛器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075980B (de) 1959-02-06 1960-02-18 Richard Antretter Trockenrasiergeraet mit einem die Messer unter Federbelastung gegen eine Scherfolie drueckenden Scherkopf
NL132084C (enrdf_load_stackoverflow) 1962-03-20

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1334534A (en) * 1919-11-24 1920-03-23 Collins Rotary Safety Razor Co Adjustable razor-blade guard
US1351507A (en) * 1918-07-27 1920-08-31 Collins Cap Bertrand Rotary safety-razor
US2116229A (en) * 1936-11-23 1938-05-03 Edward G Bader Electric razor
US2166025A (en) * 1937-07-23 1939-07-11 Frederick K Schwarz Electric razor
US2223286A (en) * 1938-05-11 1940-11-26 Casco Products Corp Shaving machine
US2334254A (en) * 1940-01-20 1943-11-16 Groot Jan De Dry-shaving apparatus
US2369198A (en) * 1938-06-13 1945-02-13 Harold G Wyse Mechanical shaver
FR911314A (fr) * 1945-01-12 1946-07-04 Appareil à raser
US2536015A (en) * 1944-03-08 1950-12-26 Konrad Hermann Razor and comb
US2677885A (en) * 1950-09-08 1954-05-11 Kenneth W Chaun Shaving apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH188939A (de) * 1936-04-08 1937-01-31 Amsler Max Einrichtung an Trockenrasierapparaten und Haarschneidmaschinen zum federnden Anpressen des beweglichen Scherkammes an den festen Scherkamm.
CH238372A (fr) * 1941-07-02 1945-07-15 Konrad Hermann Appareil électrique pour sectionner à sec les poils ou les cheveux.
US2524822A (en) * 1946-03-20 1950-10-10 Neidig William Jonathan Shaving mechanism

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351507A (en) * 1918-07-27 1920-08-31 Collins Cap Bertrand Rotary safety-razor
US1334534A (en) * 1919-11-24 1920-03-23 Collins Rotary Safety Razor Co Adjustable razor-blade guard
US2116229A (en) * 1936-11-23 1938-05-03 Edward G Bader Electric razor
US2166025A (en) * 1937-07-23 1939-07-11 Frederick K Schwarz Electric razor
US2223286A (en) * 1938-05-11 1940-11-26 Casco Products Corp Shaving machine
US2369198A (en) * 1938-06-13 1945-02-13 Harold G Wyse Mechanical shaver
US2334254A (en) * 1940-01-20 1943-11-16 Groot Jan De Dry-shaving apparatus
US2536015A (en) * 1944-03-08 1950-12-26 Konrad Hermann Razor and comb
FR911314A (fr) * 1945-01-12 1946-07-04 Appareil à raser
US2677885A (en) * 1950-09-08 1954-05-11 Kenneth W Chaun Shaving apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413719A (en) * 1965-05-31 1968-12-03 Moser Kuno Electric razor with adjustable cutter
CN115091510A (zh) * 2022-06-25 2022-09-23 中山寰亚刀具有限公司 一种刀头可旋转的剃毛器

Also Published As

Publication number Publication date
GB804558A (enrdf_load_stackoverflow) 1958-11-19
FR1160328A (fr) 1958-07-11
CH335961A (de) 1959-01-31
DE1010412B (de) 1957-06-13

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