US2900720A - Dry shaver with a self adjusting shear plate and rotary cutter - Google Patents

Dry shaver with a self adjusting shear plate and rotary cutter Download PDF

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Publication number
US2900720A
US2900720A US630824A US63082456A US2900720A US 2900720 A US2900720 A US 2900720A US 630824 A US630824 A US 630824A US 63082456 A US63082456 A US 63082456A US 2900720 A US2900720 A US 2900720A
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United States
Prior art keywords
shear plate
cutting member
driving shaft
rotary cutter
dry shaver
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Expired - Lifetime
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US630824A
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Starre Gerrit
Bakker Eppe
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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    • 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
    • B26B19/145—Cutters being movable in the cutting head
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another

Definitions

  • This invention relates to improvements in or relating to dry-shaving apparatus having a shear plate adapted to take up an inclined position with respect to the axis of the apparatus and a rotary cutting member co-operating with said plate.
  • this movable connection consists of a single thin spindle, the straight middle part of which is journalled in a groove formed in the end of the driving shaft, the straight ends of this spindle lying in a plane passing through the middle part so as to extend at right angles to this middle part and being journalled in the cutting member, while the parts connecting the straight ends to the middle part are spaced away from the driving shaft.
  • the user can determine the pressure between the shear plate and the cutting member, which latter'pressure must be greater for a person having a heavy beard than for a person having a light beard in order to ensure the optimum shaving efficiency.
  • This effect can also be achieved by means of a shaving head according to a prior suggestion, in which the cutting member is rigidly journalled and the shear plate is displaceable only in a direction parallel to itself.
  • theshear plate must be guided witha high degree of accuracy. Even with small deviations, the cutting member is likely. to catch in the shear plate and to rip it open.
  • the surface area'of the shear plate can be increased, since this plate is supported by the cutting member, so that the plate is less likely to sag or even break. It is also possible to arrange a number of plates concentrically with respect to one another, each plate being freeto adjust itself with respect to the remaining plates.
  • the cutting member is provided with an annular thickened portion having grooves formed in it; in which the straight ends of the thin spindle are journalled, 'aclosing cover being clamped over-the annular thickened portion.
  • Fig. 1 is a cross-sectional view of part of the dryshaving apparatus in accordance with the invention
  • Fig. 2 is a bottom plan-view of the cutting member and the thin spindle, the closing cover being removed, and
  • Fig. 3 shows a structural detail of the shear plate and the apparatus.
  • a shear plate 1 is arranged in the apparatus between annular stops 2 and 3 so as to be freely adjustable.
  • the stop 3 is provided with at least one rib 4 arranged in recesses 5 in the rim 6 of the shear plate 1, so that this shear plate is prevented from rotating about its axis.
  • Fig. 3 discloses two ribs 4 on opposite sides of the razor casing and arranged in recesses 5.
  • the shear plate 1 is prevented from rotational move ment about its axis by means of ribs 4 in recesses 5.
  • limited axial movement of the shear plate 1 is permitted between the stops 2 and 3.
  • the driving shaft 8 is rigidly journalled in the axial direction, so that the shear plate 1 is supported by the cutting member 7.
  • a dry shaver comprising a shear plate adapted to be positioned angularly relative to the axis of said shaver, a rotary cutting member co-acting with said shear plate and adjustable therewith, a driving shaft having a groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said means including a sinuous spindle provided with a linear middle portion having part thereof in said groove, and straight end portions extending in the same plane as said middle portion and substantially at right angles thereto, said end portions'secured to said cutting member, and parts connecting said end portions to said middle portion spaced from and movable, a rotary cutting member co-acting with said shear plate, means preventing said shear plate from rotational movement but permitting limited axial movement thereof, means rigidly journalling said cutting mem- .4 ber in the axial direction whereby said shear plate is supported by said cutting member, 'a driving shaft havinga groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said last mentioned means including
  • a dry shaver comprising a shear plate adapted to be positionedangularly. relative to the axis of said shaver and movable, a rotary cutting member co-acting with said shear plate, means rigidlyjournalling said cutting member in the axial'direction whereby said shear plate is supported by s'aidcutting member, a driving shaft having a groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said last mentioned means including a sinuous spindle provided with a linear middle portion having part thereof in said groove, and straight end portions extending in the same plane as said middle portion and substantially at right angles thereto, said end portions secured to said cutting member, partsconnecting said end portion to said middle portion spaced from said driving shaft, said cutting member having an annular thickened portion with slots :therein, said straight end portions of said sinuous spindle in said slots, and a closing cover affixed to said annular thickened portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Dry Shavers And Clippers (AREA)

Description

Aug. 25, 1959 G. STARRE ETAL DRY SHAVER WITH A SELF ADJUSTING SHEAR PLATE AND ROTARY CUTTER Filed Dec. 27, 1956 INVENTOR DRY SHAVER WITH A SELF ADJUSTING PLATE AND ROTARY CU'ITER Gerrit Starre and Eppe Bakker, Drachten, Netherlands, assignors, by mesne assignments, to North American Philips Company, Inc., New York, N.Y., a corporation of Delaware Application December 27, 1956, Serial No. 630,824
Claims priority, application Netherlands January 17, 1956 3 Claims. (CI. 30-43) This invention relates to improvements in or relating to dry-shaving apparatus having a shear plate adapted to take up an inclined position with respect to the axis of the apparatus and a rotary cutting member co-operating with said plate.
In dry-shaving apparatus having a shear plate adapted to take up an inclined position with respect to the axis of United States Patent sponding cross-section is arranged with a certain amount of play. By a spring surrounding the driving element the cutting member is urged to the shear plate.
It has been found that the above known movable conmotion between the' cutting member and the driving element is not always satisfactory. Frequently, this relative movement results in that during shaving the cutting member performs a rocking movement over the shear plate, so that not all the hairs extending through the apertures of the shear plate are cut off. Thisrocking movement also resultsin uneyenwear of the shear plate and .the cutting member, so that after prolonged use the cutting edges cannot accurately engage the shear plate.
The causes of this rocking movement have remained obscure a long time in spite of prolonged and intensive research. However, it has now been found that the known movable connection between the cutting member and the driving element prevents the cutting member from invariably adjusting itself accurately to the shear plate.
It is an object of the present invention to obviate this disadvantage.
According to the invention, this movable connection consists of a single thin spindle, the straight middle part of which is journalled in a groove formed in the end of the driving shaft, the straight ends of this spindle lying in a plane passing through the middle part so as to extend at right angles to this middle part and being journalled in the cutting member, while the parts connecting the straight ends to the middle part are spaced away from the driving shaft.
Thus, a simple highly movable connection is obtained which enables the cutting member to take up an inclined position with respect to the axis of the dry-shaving apparatus equally well in all directions, only a minimum friction having to be overcome. The fact that the connecting parts of the thin spindle are spaced away from the driving shaft ensures that they are not prevented by this shaft from following a change in position of the cutting member. In addition, the shear plate is now as little as possible prevented by the cutting member from taking up a position which conforms withthe shape of the skin to which the shear plate is pressed. Even when the shear plate occupies an inclined position, the cutting member is completely free to adjust itself to the shear is capable of axial movement, the cutting member is rigidly journalled in the axial direction, so that the shear plate is supported by the cutting member. Thus, by means of the pressure of the apparatus on the skin,
the user can determine the pressure between the shear plate and the cutting member, which latter'pressure must be greater for a person having a heavy beard than for a person having a light beard in order to ensure the optimum shaving efficiency. This effect can also be achieved by means of a shaving head according to a prior suggestion, in which the cutting member is rigidly journalled and the shear plate is displaceable only in a direction parallel to itself. In this proposed construction, theshear plate must be guided witha high degree of accuracy. Even with small deviations, the cutting member is likely. to catch in the shear plate and to rip it open.
According to the invention, the surface area'of the shear plate can be increased, since this plate is supported by the cutting member, so that the plate is less likely to sag or even break. It is also possible to arrange a number of plates concentrically with respect to one another, each plate being freeto adjust itself with respect to the remaining plates. 1
In order to prevent the cutting member from performing axial vibrations, bywhich the cutting member might damage the shear plate, it is necessary in view of the rotary movement of the cutting member that the thin spindle isaccurately centered with respect tothe cutting member. According to afurther feature-of the invention, the cutting member is provided with an annular thickened portion having grooves formed in it; in which the straight ends of the thin spindle are journalled, 'aclosing cover being clamped over-the annular thickened portion.
This ensures a very effective and cheap centering of the cutting member, the shear plate being prevented from vibrating.
In order that the invention may readily be carried out, one embodiment of a dry-shaving apparatus in accordance with the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
Fig. 1 is a cross-sectional view of part of the dryshaving apparatus in accordance with the invention,
Fig. 2 is a bottom plan-view of the cutting member and the thin spindle, the closing cover being removed, and
Fig. 3 shows a structural detail of the shear plate and the apparatus.
In the figures, corresponding parts are designated by like reference numerals.
A shear plate 1 is arranged in the apparatus between annular stops 2 and 3 so as to be freely adjustable. Along its circumference, the stop 3 is provided with at least one rib 4 arranged in recesses 5 in the rim 6 of the shear plate 1, so that this shear plate is prevented from rotating about its axis. Fig. 3 discloses two ribs 4 on opposite sides of the razor casing and arranged in recesses 5. Thus, the shear plate 1 is prevented from rotational move ment about its axis by means of ribs 4 in recesses 5. However, limited axial movement of the shear plate 1 is permitted between the stops 2 and 3.
Below the shear plate 1 provision is made in the usual manner of a cutting member 7 which is coupled to a driving shaft 8 by means of a thin spindle 9. The straight middle portion 10 of this spindle is journalled in a groove 11 of the driving shaft 8. Straight ends 12, 13 lie in the plane of the straight middle portion so as to be at right angles thereto. The ends 12 and 13 are journalled in grooves 14, 15 of an annular thickened portion 16 of the cutting member 7. 'Between the ends 12, 13. and the straight middle portion 10 of the "thinspindle 9 provision is made of connecting parts 17, "18 at some distance from the driving shaft 8, so that the thin spindle 9 is sufliciently free to move relatively to the driving shaft 8.
The driving shaft 8 is rigidly journalled in the axial direction, so that the shear plate 1 is supported by the cutting member 7.
What is claimed is:
1. A dry shaver comprising a shear plate adapted to be positioned angularly relative to the axis of said shaver, a rotary cutting member co-acting with said shear plate and adjustable therewith, a driving shaft having a groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said means including a sinuous spindle provided with a linear middle portion having part thereof in said groove, and straight end portions extending in the same plane as said middle portion and substantially at right angles thereto, said end portions'secured to said cutting member, and parts connecting said end portions to said middle portion spaced from and movable, a rotary cutting member co-acting with said shear plate, means preventing said shear plate from rotational movement but permitting limited axial movement thereof, means rigidly journalling said cutting mem- .4 ber in the axial direction whereby said shear plate is supported by said cutting member, 'a driving shaft havinga groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said last mentioned means including a sinuous spindle provided with a linear middle portion'having part thereof in said groove, and straight end portions extending in the same plane as said middle portion and substantially at right angles thereto, said end portions secured to said cutting member, and parts'connectingxsaid BlldjPOItlOll to :said middle portionspaced from said'driving shaft.
3. A dry shaver comprising a shear plate adapted to be positionedangularly. relative to the axis of said shaver and movable, a rotary cutting member co-acting with said shear plate, means rigidlyjournalling said cutting member in the axial'direction whereby said shear plate is supported by s'aidcutting member, a driving shaft having a groove in one end thereof, means connecting said rotary cutting member to said driving shaft, said last mentioned means including a sinuous spindle provided with a linear middle portion having part thereof in said groove, and straight end portions extending in the same plane as said middle portion and substantially at right angles thereto, said end portions secured to said cutting member, partsconnecting said end portion to said middle portion spaced from said driving shaft, said cutting member having an annular thickened portion with slots :therein, said straight end portions of said sinuous spindle in said slots, and a closing cover affixed to said annular thickened portion.
References Cited inthe file of this patent UNITED STATES PATENTS 2,119,284 Meyer May 31, 1938 2,279,682 'Jackson .Apr. 14,1942 2,280,052 Bahr Apr. .21, 1942 2,341,833 Volz Feb. 15, 1944 2,677,884 Richard May 11, 1954 2,716,278 Thompson Aug. 30, 1955 FOREIGN PATENTS 974,147 France Sept. 27, 1950 491,339 Italy 'Mar. 4, 1954
US630824A 1956-01-17 1956-12-27 Dry shaver with a self adjusting shear plate and rotary cutter Expired - Lifetime US2900720A (en)

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Application Number Priority Date Filing Date Title
NL593309X 1956-01-17

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US2900720A true US2900720A (en) 1959-08-25

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US (1) US2900720A (en)
BE (1) BE554229A (en)
CA (1) CA593309A (en)
CH (1) CH351861A (en)
DE (1) DE1034512B (en)
FR (1) FR1164468A (en)
GB (1) GB859086A (en)
NL (1) NL91371C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979819A (en) * 1959-12-08 1961-04-18 Jacob L Kleinman Cushioning shaving head units for shaving implements
US3715803A (en) * 1971-02-16 1973-02-13 T Tyler Rotary dry shaver with tiltable shear plates
US3844033A (en) * 1972-07-14 1974-10-29 Bissell Inc Rotary shaver with interlocking means to prevent shear plate rotation
US4001932A (en) * 1972-07-14 1977-01-11 Bissell Inc. Rotary shaver with shear plate rotation preventing means
US4077120A (en) * 1972-07-14 1978-03-07 Bissell, Inc. Dry shaver with floating peripherally supported shear plate
USRE30857E (en) * 1971-02-16 1982-02-02 Edwin E. Greigg Rotary dry shaver with tiltable shear plates
WO2003018272A1 (en) * 2001-08-23 2003-03-06 Koninklijke Philips Electronics N.V. System of two types of shaving apparatus
US6647626B2 (en) * 2000-08-11 2003-11-18 Izumi Products Company Electric rotary shaver
US20060260130A1 (en) * 2005-05-18 2006-11-23 Izumi Products Company Rotary electric shaver

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429354A (en) * 1966-02-07 1969-02-25 Celanese Corp Tire cord constructions and tires made therewith
GB1570462A (en) * 1977-01-17 1980-07-02 Remington Products Electric dry shavers
DE3843936C1 (en) * 1988-12-24 1990-05-31 Braun Ag, 6000 Frankfurt, De

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119284A (en) * 1938-03-29 1938-05-31 Art Metal Works Inc Shaving mechanism
US2279682A (en) * 1938-03-31 1942-04-14 Jackson Jesse Atwater Shearing shaver
US2280052A (en) * 1938-02-26 1942-04-21 Casco Products Corp Shaving machine
US2341833A (en) * 1941-09-29 1944-02-15 Chris L Volz Shaving device
FR974147A (en) * 1941-05-06 1951-02-19 Operative head for shaving and cutting
US2677884A (en) * 1948-12-29 1954-05-11 Richard & Ammann S A Rotary razor shear head
US2716278A (en) * 1953-04-01 1955-08-30 Rutherford E Thompson Electric razor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1088648A (en) * 1953-09-10 1955-03-09 Electric razor
DE956114C (en) * 1953-10-05 1957-01-10 Philips Nv Dry shaver with perforated shear plate and cutting element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280052A (en) * 1938-02-26 1942-04-21 Casco Products Corp Shaving machine
US2119284A (en) * 1938-03-29 1938-05-31 Art Metal Works Inc Shaving mechanism
US2279682A (en) * 1938-03-31 1942-04-14 Jackson Jesse Atwater Shearing shaver
FR974147A (en) * 1941-05-06 1951-02-19 Operative head for shaving and cutting
US2341833A (en) * 1941-09-29 1944-02-15 Chris L Volz Shaving device
US2677884A (en) * 1948-12-29 1954-05-11 Richard & Ammann S A Rotary razor shear head
US2716278A (en) * 1953-04-01 1955-08-30 Rutherford E Thompson Electric razor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979819A (en) * 1959-12-08 1961-04-18 Jacob L Kleinman Cushioning shaving head units for shaving implements
US3715803A (en) * 1971-02-16 1973-02-13 T Tyler Rotary dry shaver with tiltable shear plates
USRE30857E (en) * 1971-02-16 1982-02-02 Edwin E. Greigg Rotary dry shaver with tiltable shear plates
US3844033A (en) * 1972-07-14 1974-10-29 Bissell Inc Rotary shaver with interlocking means to prevent shear plate rotation
US4001932A (en) * 1972-07-14 1977-01-11 Bissell Inc. Rotary shaver with shear plate rotation preventing means
US4077120A (en) * 1972-07-14 1978-03-07 Bissell, Inc. Dry shaver with floating peripherally supported shear plate
US6647626B2 (en) * 2000-08-11 2003-11-18 Izumi Products Company Electric rotary shaver
WO2003018272A1 (en) * 2001-08-23 2003-03-06 Koninklijke Philips Electronics N.V. System of two types of shaving apparatus
US20040205969A1 (en) * 2001-08-23 2004-10-21 Sjoerd Haites System of two types of shaving apparatus
US20060260130A1 (en) * 2005-05-18 2006-11-23 Izumi Products Company Rotary electric shaver
US7370420B2 (en) * 2005-05-18 2008-05-13 Izumi Products Company Rotary electric shaver

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Publication number Publication date
CA593309A (en) 1960-02-23
CH351861A (en) 1961-01-31
BE554229A (en)
DE1034512B (en) 1958-07-17
NL91371C (en)
FR1164468A (en) 1958-10-09
GB859086A (en) 1961-01-18

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