US2867039A - Electric dry shaving apparatus - Google Patents

Electric dry shaving apparatus Download PDF

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Publication number
US2867039A
US2867039A US56404556A US2867039A US 2867039 A US2867039 A US 2867039A US 56404556 A US56404556 A US 56404556A US 2867039 A US2867039 A US 2867039A
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Prior art keywords
motor
plug
low voltage
storage battery
source
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Zach Wilhelm
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Artur Harter K G
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Artur Harter K G
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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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3853—Housing or handle
    • 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
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • 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
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/286—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive providing for two or more different electrical power sources
    • 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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • 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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3873—Electric features; Charging; Computing devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S30/00—Cutlery
    • Y10S30/01—Rechargeable battery operated

Definitions

  • FIG. 6 ELECTRIC DRY SHAVING APPARATUS Filed Feb. 7, 1956 3 hets-Sheet 5 FIG. 6
  • Electric shaving apparatus of this type having to the driving motor, a switch, and a battery mounted in the handle, is already known to the art.
  • dry shaving apparatus for low voltage actuation is improved by the addition of a rectifier in the handle and by provision of a plug socket in the housing to receive the plug end of a low voltage cable.
  • Apparatus of this kind can be operated not only from the source of direct current arranged in the apparatus, but also selectively from a low voltage battery outside the apparatus, or from an alternating current power supply.
  • a special cable which at one end fits into the plug socket in the handle.
  • the cable connection to the alternating current power supply includes a transformer, permitting only a harmless low voltage to be present at the connecting means of the apparatus.
  • the source of direct current arranged in the handle of the apparatus is preferably an accumulator, as this ensures constant voltage for a considerable length of time. Also it can be subjected to higher voltage or loading than a Leclanch cell and carries a higher capacity.
  • the plug socket in the handle is composed, in known manner, preferably of a metallic cylindrical recess having an inner thread and forming one of the two poles, while the other pole is formed by a plug receptacle centrally extending from the bottom of the cylindrical recess and insulated from the latter.
  • the cable is provided at the end to be inserted in the plug socket of the handle with a metallic sleeve having an exterior thread and a central plug extending through and insulated from said exteriorly threaded sleeve.
  • the sleeve carrying the exterior thread is then screwed into the cylindrical recess carrying the inner thread, when simultaneously the central plug of the cable engages the plug receptacle extending from the bottom of the cylindrical recess. In this way the cable is mechanically, as well as electrically detachably secured to the handle.
  • the shaft of the motor extends, differing herein from the motor-shafts of similar apparatus energized by batteries, at a right angle to the axis of the handle of the apparatus, penetrating the wall of the casing.
  • the place where the shaft penetrates the wall of the casing is closed by a threaded collar having a hemispherical recess against which the shaft bears by means of a perforated ball mounted on the shaft.
  • the ball is secured on the shaft, on one side by-a shouldered portion of the shaft, and on the other side by a spring clip. In this way the shaving pressure is absorbed, while a reduction in working capacity of the motor through friction is avoided.
  • the rectifier is preferably a bridge-rectifier, so that the direction of rotation of the motor is independent of the polarity of an outside direct current source applied to the rectifier.
  • Fig. 1 is a perspective view of the shaving apparatus, with a portion of the casing removed to show the interior;
  • Fig. 2 is a central longitudinal section through the plug at the end of the cable
  • Fig. 3 is a central vertical section of the portion of the casing where the shaft of the motor is extended through it, showing the perforated ball in the cap-like hemispherical recess, the section being taken on line III-III of Fig. 4;
  • Fig. 4 is a cross-section on line IVIV of Fig. 3;
  • Fig. 5 shows a wiring plan as used with the source of direct current inside the apparatus of Fig. 1;
  • Fig. 6 shows a wiring plan as used when a low voltage battery outside the apparatus of Fig. 1 is employed
  • Fig. 7 shows a wiring plan as used when an alternating current network is employed.
  • collar 29 is provided with a recessed portion 24 having the shape of a hemispherical cap, in which rotates a perforated ball 22 mounted on the shaft 5.
  • the ball 22 on one side is seated on a shouldered portion 30 of the shaft 5 and on the opposite side is secured 'in position by the pressure of a spring clip 23.
  • This also considerably facilitates assembly.
  • 21 is the armature of the motor 4.
  • 25 is the four-sided portion of the shaft 5 on which the cutter is seated.
  • 7 is a source of direct current of the accumulator type having its terminals 8 and 9 connected with the motor 4, one of them via the switch 10 operable by means of the handle 31.
  • the rectifier 11 and the connecting means 12 for the cable Positioned behind the battery 7 are the rectifier 11 and the connecting means 12 for the cable.
  • the connecting means for the cable within the casing 2 consist of an Piitented Jan. 6, 1959 interiorly threaded recess provided with a centrally positioned plug receptacle, so that, as the thread 14 is screwed into the threaded recess, the plug 13 engages the plug receptacle.
  • the plug 13 is provided with a disk-like projecting portion by means of which it is secured in position between the insulating disks 15 within the plug body (see Fig. 2).
  • the internal end of the plug 13 is supported in an insulating sleeve 19 and connected at 16 to one cable line.
  • the threaded portion 14 is adjoined by a knurled cylindrical portion 18 which is rotatably attached to the plug body 20. Connected to this cylindrical member 18 is the other wire 17 of the cable 32 (see Fig. 2).
  • a dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in said housing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridge-type rectifier device having a positive and a negative output terminal and two input terminals, and being located in said housing, said positive output terminal being connected to the positive pole of said storage battery and said negative output terminal being connected to the negative pole of said storage battery; and a plug socket arranged in said housing and adapted to receive the plug end of a low votlage cable, said socket being connected to said input terminals of said rectifier device, said bridge-type rectifier providing unalterable polarity of energy supply to said D.
  • a dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in saidhousing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals with fixed polarity as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridge type rectifier device connected to said motor terminals with the same polarity as said battery; and a plug socket arranged in said housing and adapted to receive the plug end of a low voltage cable, said socket being connected to said rectifier device, said bridge-type rectifier providing unalterable polarity of energy supply to said D.
  • a dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in said housing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridgetype rectifier device having a positive and a negative output terminal and two input terminals, and being located in said housing, said positive output terminal being connected to the positive pole of said storage battery and said negative output terminal being connected to the negative pole of said storage battery, said bridge-type rectifier providing unalterable polarity of energy supply to said D.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Dry Shavers And Clippers (AREA)

Description

Jan. 6, 1959 v w. ZACH 2,857,039
ELECTRIC DRY SHAVING APPARATUS Filed Feb. 7, 1956 3 Sheets-Sheet 1 mm M31, M Wok W Jan. 6, 1959 "w. ZACH 2,867,039
. ELECTRIC DRY SHAVING APPARATUS Filed Feb. 7, 1956 v s Sheets-Sheet 2 )Qwmroa Mm M TM mm Jan. 6, 1959 w. zAcH 2,867,039
ELECTRIC DRY SHAVING APPARATUS Filed Feb. 7, 1956 3 hets-Sheet 5 FIG. 6
INVENTOE mm M 1 W W/v 5W United States Patent ELECTRIC DRY SHAVING APPARATUS Wilhelm Zach, Pforzheim, Germany, assignor of one-half to Artur Hiirter K. G., Ellmendingen, near Pforzheim, Germany Application February 7, 1956, Serial No. 564,045 Claims priority, application Germany February 26, 1955 3 Claims. (Cl. 30-43) This invention relates to an electric dry shaving ap paratus provided with a rotating cutter and adapted for low voltage actuation.
Electric shaving apparatus of this type, having to the driving motor, a switch, and a battery mounted in the handle, is already known to the art.
According to the present invention dry shaving apparatus for low voltage actuation is improved by the addition of a rectifier in the handle and by provision of a plug socket in the housing to receive the plug end of a low voltage cable. Apparatus of this kind can be operated not only from the source of direct current arranged in the apparatus, but also selectively from a low voltage battery outside the apparatus, or from an alternating current power supply.
For connection to the low voltage outside battery or to the alternating current power supply there is provided a special cable which at one end fits into the plug socket in the handle. The cable connection to the alternating current power supply includes a transformer, permitting only a harmless low voltage to be present at the connecting means of the apparatus.
According to the present invention the source of direct current arranged in the handle of the apparatus is preferably an accumulator, as this ensures constant voltage for a considerable length of time. Also it can be subjected to higher voltage or loading than a Leclanch cell and carries a higher capacity.
The plug socket in the handle is composed, in known manner, preferably of a metallic cylindrical recess having an inner thread and forming one of the two poles, while the other pole is formed by a plug receptacle centrally extending from the bottom of the cylindrical recess and insulated from the latter. In cooperation herewith, the cable is provided at the end to be inserted in the plug socket of the handle with a metallic sleeve having an exterior thread and a central plug extending through and insulated from said exteriorly threaded sleeve. The sleeve carrying the exterior thread is then screwed into the cylindrical recess carrying the inner thread, when simultaneously the central plug of the cable engages the plug receptacle extending from the bottom of the cylindrical recess. In this way the cable is mechanically, as well as electrically detachably secured to the handle.
In the apparatus described herein by way of example, the shaft of the motor extends, differing herein from the motor-shafts of similar apparatus energized by batteries, at a right angle to the axis of the handle of the apparatus, penetrating the wall of the casing. The place where the shaft penetrates the wall of the casing is closed by a threaded collar having a hemispherical recess against which the shaft bears by means of a perforated ball mounted on the shaft. The ball is secured on the shaft, on one side by-a shouldered portion of the shaft, and on the other side by a spring clip. In this way the shaving pressure is absorbed, while a reduction in working capacity of the motor through friction is avoided. For
same time the polarity of the source of direct current is such that, with the said switch closed, a short-circuit via the rectifier is blocked. The rectifier is preferably a bridge-rectifier, so that the direction of rotation of the motor is independent of the polarity of an outside direct current source applied to the rectifier.
Additional features and advantages of the invention will be understood from a consideration of the following detailed description taken in connection with the accompanying drawings, forming a part of this specification and in which an embodiment of the invention has been shown by way of example. While the invention has been illustrated and described as embodied in an electric dry shaving apparatus, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
In the drawings, in which like parts are referred to by the same reference numerals throughout the several figures,
Fig. 1 is a perspective view of the shaving apparatus, with a portion of the casing removed to show the interior;
Fig. 2 is a central longitudinal section through the plug at the end of the cable;
Fig. 3 is a central vertical section of the portion of the casing where the shaft of the motor is extended through it, showing the perforated ball in the cap-like hemispherical recess, the section being taken on line III-III of Fig. 4;
Fig. 4 is a cross-section on line IVIV of Fig. 3;
Fig. 5 shows a wiring plan as used with the source of direct current inside the apparatus of Fig. 1;
Fig. 6 shows a wiring plan as used when a low voltage battery outside the apparatus of Fig. 1 is employed;
Fig. 7 shows a wiring plan as used when an alternating current network is employed.
Referring now to the drawings in detail, the refertwo halves of the casing 2 is the threaded collar 29. The
collar 29 is provided with a recessed portion 24 having the shape of a hemispherical cap, in which rotates a perforated ball 22 mounted on the shaft 5. The ball 22 on one side is seated on a shouldered portion 30 of the shaft 5 and on the opposite side is secured 'in position by the pressure of a spring clip 23. This also considerably facilitates assembly. 21 is the armature of the motor 4. 25 is the four-sided portion of the shaft 5 on which the cutter is seated. 7 is a source of direct current of the accumulator type having its terminals 8 and 9 connected with the motor 4, one of them via the switch 10 operable by means of the handle 31. Positioned behind the battery 7 are the rectifier 11 and the connecting means 12 for the cable. From the connecting means 12 the cable 17, provided with the rubber sleeve 32, leads to the low voltage battery (see Fig. 6), or, via a transformer 27 to the alternating current network 26. The connecting means for the cable Within the casing 2 consist of an Piitented Jan. 6, 1959 interiorly threaded recess provided with a centrally positioned plug receptacle, so that, as the thread 14 is screwed into the threaded recess, the plug 13 engages the plug receptacle. The plug 13 is provided with a disk-like projecting portion by means of which it is secured in position between the insulating disks 15 within the plug body (see Fig. 2). The internal end of the plug 13 is supported in an insulating sleeve 19 and connected at 16 to one cable line. The threaded portion 14 is adjoined by a knurled cylindrical portion 18 which is rotatably attached to the plug body 20. Connected to this cylindrical member 18 is the other wire 17 of the cable 32 (see Fig. 2).
What I claim as new and desire to secure by Letters Patent of the United States is:
1. A dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in said housing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridge-type rectifier device having a positive and a negative output terminal and two input terminals, and being located in said housing, said positive output terminal being connected to the positive pole of said storage battery and said negative output terminal being connected to the negative pole of said storage battery; and a plug socket arranged in said housing and adapted to receive the plug end of a low votlage cable, said socket being connected to said input terminals of said rectifier device, said bridge-type rectifier providing unalterable polarity of energy supply to said D. C. motor, so that by connecting said plug socket to an outside low voltage source of direct current said motor is energized with said predetermined direction of turn and said storage battery is charged by said outside source of direct current, and that by connecting said plug socket to an outside low voltage source of alternating current said motor is energized with the same direction of turn and said storage battery is charged by said outside source of alternating current through said rectifier while alternatively said motor may be energized by said storage battery alone independently of any one of said other sources.
2. A dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in saidhousing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals with fixed polarity as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridge type rectifier device connected to said motor terminals with the same polarity as said battery; and a plug socket arranged in said housing and adapted to receive the plug end of a low voltage cable, said socket being connected to said rectifier device, said bridge-type rectifier providing unalterable polarity of energy supply to said D. C. motor, so that by connecting said plug socket to an outside low voltage source of direct current said motor is energized with said predetermined direction of turn and said storage battery is charged by said outside source of direct current, and that by connecting said plug socket to an outside low voltage source of alternating current said motor is energized with the same direction of turn and said storage battery is charged by said outside source of alternating current through said rectifier while alternatively said motor may be energized by said storage battery alone independently of any one of said other sources.
3. A dry shaver comprising, in combination, a housing; a low voltage D. C. motor located in said housing and having two motor terminals; a rotary cutter device attached to said motor; a storage battery located in said housing and connected to said motor terminals as a source of low voltage direct current for energizing said motor with a predetermined direction of turn; a normally open switch connected in circuit with said motor and said storage battery for applying voltage to said motor from said battery by closing said switch whenever desired; a bridgetype rectifier device having a positive and a negative output terminal and two input terminals, and being located in said housing, said positive output terminal being connected to the positive pole of said storage battery and said negative output terminal being connected to the negative pole of said storage battery, said bridge-type rectifier providing unalterable polarity of energy supply to said D. C. motor; a source of direct current of low voltage of at least the same potential as said storage battery, said source of D. C. being connected with said input terminals for energizing said motor with said predetermined direction of turn and simultaneously charging said storage battery; a plug socket arranged in said housing and adapted to receive the plug end of a low voltage cable, said socket being connected to said input terminals; and a low voltage cable having a plug device at one end for being connected with said plug circuit, and having connecting means at the other end for being connected with said source of direct current, so that by connecting said plug socket to an outside low voltage source of direct current said motor is energized with the same direction of turn and said storage battery is charged by said outside source of direct current while alternatively said motor may be energized by said storage battery alone independently of any one of said other sources.
References Cited in the file of this patent UNITED STATES PATENTS 404,139 Westinghouse May 28, 1889 873,123 Gardy Dec. 10, 1907 1,093,102 Bonham Apr. 14, 1914 1,506,302 Hopkins Aug. 26, 1924 1,952,936 Murakami Mar. 24, 1934 1,981,787 Florman Nov. 20, 1934 2,410,527 Schinske Nov. 5, 1934 2,423,595 Hall July 8, 1947 2,628,339 Werner Feb. 10, 1953 2,755,331 Melcher July 17, 1956
US56404556 1955-02-26 1956-02-07 Electric dry shaving apparatus Expired - Lifetime US2867039A (en)

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CH346454A (en) 1960-05-15
FR1150169A (en) 1958-01-08

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