US2598452A - Lighting device for sewing machines - Google Patents

Lighting device for sewing machines Download PDF

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Publication number
US2598452A
US2598452A US786698A US78669847A US2598452A US 2598452 A US2598452 A US 2598452A US 786698 A US786698 A US 786698A US 78669847 A US78669847 A US 78669847A US 2598452 A US2598452 A US 2598452A
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US
United States
Prior art keywords
reflector
lighting device
machine
sewing machine
top wall
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
US786698A
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English (en)
Inventor
Singer Mor Josif
Draaisma Gijsbertus Hendricus
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2598452A publication Critical patent/US2598452A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B79/00—Incorporations or adaptations of lighting equipment

Definitions

  • the present invention relates to a lighting device for sewing machines, and more particularly to a reflector attached to the bottom face of the head of a sewing machine.
  • the present invention mainly consists in a single reflector having a horizontal top wall provided with a non-reflecting top face and a reflecting bottom face.
  • the reflector is mounted on a sewing machine with the upper face of the top wall thereof abutting against the bottom face of the machine head.
  • a hole is provided in the top wall permitting passing of the presser foot bar.
  • the reflector has on either side oppositely arranged downwardly bent edge wall portions. Light emitted by bulbs arranged below the reflector parallel and adjacent to the bent edge wall portions is reflected downwardly towards the working area of the sewing machine.
  • a cut-out is preferably provided in the front edge of the top wall and permits viewing of the presser foot bar and needle of the sewing machine during a sewing operation.
  • the reflector may be attached to the machine head by a hooked tongue which is secured to the reflector, and clamped to the machine head by means of a nut or screw, which is provided on most sewing machines for lubrication.
  • the reflector according to the present invention may be attached to the head of the sewing machine by any other attachment means.
  • Fig. 1 is a diagram showing variation ofthe light intensity over the working area of a sewing machine
  • Fig. 2 is a perspective view of a sewing machine head with a reflector according to the present invention attached thereto;
  • Fig. '3 is a bottom view of a lighting device according to the present invention.
  • Fig. 4 is a cross-section on line 4-4 of Fig. 3;
  • Fig. 5 is a rear view of a sewing machine provided with a reflector according to the present invention.
  • Fig. 6 is a perspective view of means for supplying electric current to the lighting device according to the'present invention.
  • Figure 2 illustrates the head 0 of a sewing machine provided with presser foo-t C and a screw b which is provided on most sewing machines to cover a 'lubrieating channel.
  • a reflector a is attached to the bottom face of the machine head by meansof a hook shaped, or perforated tongue d.
  • the reflector a comprises a top wall I which is provided with a hole 2 through which the presser foot C of the machine passes When the device is attached to the sewing machine.
  • Two lateral curved wall portions 3 are downwardly bent to reflect the light inwardly.
  • a cut-out 4 is provided on the front edge of the reflector, and permits viewing of the presser foot during operation of the machine.
  • Elongated bulbs 5 are mounted below the top wall adjacent and parallel to the bent wall portions 3 in depressed portions 6. Instead of the depressed portions, holes may be provided for receiving the pointed ends of the bulb sockets.
  • On the rear wall I of the reflector a spring 8 is mounted which is also provided with depressed portions, or holes 9. The contact spring 8 is connected to an insulated wire [0, while the reflector and the terminal of the bulb 5, mounted in the depressed portion 6, is connected to the mass of the machine.
  • the insulated wire l0 leads to a contact H on the underside of the supporting plate of the sewing machine, so that when the machine is in operating position the contacts H engage the contacts I2 which are connected to a transformer l3.
  • This arrangement permits removing of the machine from the table without removing the lighting device from the machine head.
  • a variable resistor may be arranged within the a transformer housing permitting adjustment of the current supply to the bulbs and thereby of the intensity of the light to be produced in the Working area. Also, the transformer may be tapped to provide different voltages. These arrangements permit adaptation of the light produced by the lighting device to the lighting of the room in which the operation is carried out, and to the color of the material.
  • the above-described reflector produces an almost shadowless light in the working area, and due to its low position, the operator can never see the brightly lighted inner face of the reflector.
  • the upper surface of the reflector is non-reflecting and preferably black.
  • the reference numeral 12' indicates a graph showing the variations of light intensity of known lighting devices for sewing machines, the needle of the machine being assumed to be located at the zero point of the scale.
  • Reference numeral (1. indicates the light intensity variations produced by a device according to the present invention, and it will be noted that, while there is a sharp contrast between the lighted Working area and the surrounding area when a device according to the present invention is used, there is not much difference when the known lighting devices are employed, which leads to fatigue and eye strain of the operator.
  • the lighting device Due to the fact that the lighting device is mounted on the machine spaced only a short distance from the machine table, only small lamps are required for producing the desired light intensity, and two electric bulbs of siX watts each are producing optimal results.
  • the close contact of the lighting device with the machine head keeps the temperature of the reflector low since all heat is conducted away by the greater mass of the sewing machine head.
  • the fixed attachment of the lighting device according to the present invention prevents oscillations of the reflector, permitting long use of the bulbs and eliminating stroboscopic effects which frequently occur in other lighting devices for sewing machines due to vibrations.
  • a single substantially horizontal reflector having a horizontal fiat top wall provided with a non-refleeting top face and a reflecting bottom face and abutting with said non-reflecting top face against said bottom face of said free end of said machine head, said top wall having opposite lateral edges with downwardly bent curved edge wall portions, and being formed with a hole for the passage of said presser foot bar located spaced at equal distances from said downwardly bent curved edge wall portions, said top wall being formed with a cut-out on the front edge thereof adapted to permit viewing of said presser foot bar by an operator; socket means on said refiector oppositely arranged on the front and rear edges of said top wall for mounting elongated bulbs below said reflecting bottom face of said top wall parallel to said downwardly bent'curved edge portions of said top wall;
  • a single substantially horizontal reflector secured to said free end of the machine head and having a flat horizontal top wall provided with a non-reflecting top face and a reflecting bottom face and abutting with said non-reflecting top face against said bottom face of said free end of said machine head, said top wall having opposite lateral edges with downwardly bent curved edge wall portions and being formed with a hole for the passage of said presser foot bar located spaced at equal distances from said downwardly bent curved edge wall portions; and socket means on said reflector for mounting elongated bulbs below said reflecting bottom face of said top wall along said downwardly bent curved edge portions of said top wall.
  • MOB JOSIF SINGER. GIJSBERTUS HENDRICUS DRAAISMA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US786698A 1946-11-28 1947-11-18 Lighting device for sewing machines Expired - Lifetime US2598452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL260274X 1946-11-28

Publications (1)

Publication Number Publication Date
US2598452A true US2598452A (en) 1952-05-27

Family

ID=19781473

Family Applications (1)

Application Number Title Priority Date Filing Date
US786698A Expired - Lifetime US2598452A (en) 1946-11-28 1947-11-18 Lighting device for sewing machines

Country Status (6)

Country Link
US (1) US2598452A (ko)
BE (1) BE477712A (ko)
CH (1) CH260274A (ko)
FR (1) FR956033A (ko)
GB (1) GB637833A (ko)
NL (1) NL62233C (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122817B (de) * 1953-04-15 1962-01-25 Edgar Abravanel Elektrische Werkleuchte fuer Naehmaschinen
US3049612A (en) * 1959-06-29 1962-08-14 Sanko Mishin Kogyo Kabushiki K Lighting apparatus in sewing machines
EP0962574A1 (de) * 1998-06-05 1999-12-08 Fritz Gegauf Ag Bernina-Nähmaschinenfabrik Beleuchtungsvorrichtung für eine Nähmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623157A (en) * 1949-08-16 1952-12-23 Singer Mor Josif Reflector arrangement for sewing machine illuminating systems

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL19830C (ko) *
US1180658A (en) * 1913-10-23 1916-04-25 Firm Robert Bosch Electric-lamp fixture.
US1507597A (en) * 1923-02-15 1924-09-09 Charles H Greenwood Sewing machine
US1783519A (en) * 1929-04-11 1930-12-02 Westinghouse Electric & Mfg Co Lighting unit
FR734515A (fr) * 1932-04-01 1932-10-24 Support de lampe orientable, en particulier pour machines
US1924157A (en) * 1930-09-17 1933-08-29 Doubler Charles W H Illuminating device for sewing machines or the like
US2217863A (en) * 1937-12-22 1940-10-15 Verbury Inc Sewing machine lighting attachment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL19830C (ko) *
US1180658A (en) * 1913-10-23 1916-04-25 Firm Robert Bosch Electric-lamp fixture.
US1507597A (en) * 1923-02-15 1924-09-09 Charles H Greenwood Sewing machine
US1783519A (en) * 1929-04-11 1930-12-02 Westinghouse Electric & Mfg Co Lighting unit
US1924157A (en) * 1930-09-17 1933-08-29 Doubler Charles W H Illuminating device for sewing machines or the like
FR734515A (fr) * 1932-04-01 1932-10-24 Support de lampe orientable, en particulier pour machines
US2217863A (en) * 1937-12-22 1940-10-15 Verbury Inc Sewing machine lighting attachment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122817B (de) * 1953-04-15 1962-01-25 Edgar Abravanel Elektrische Werkleuchte fuer Naehmaschinen
US3049612A (en) * 1959-06-29 1962-08-14 Sanko Mishin Kogyo Kabushiki K Lighting apparatus in sewing machines
EP0962574A1 (de) * 1998-06-05 1999-12-08 Fritz Gegauf Ag Bernina-Nähmaschinenfabrik Beleuchtungsvorrichtung für eine Nähmaschine

Also Published As

Publication number Publication date
BE477712A (ko)
FR956033A (ko) 1950-01-23
GB637833A (en) 1950-05-24
CH260274A (de) 1949-03-15
NL62233C (ko)

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