US3326158A - Sewing machine motor mounting system - Google Patents

Sewing machine motor mounting system Download PDF

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Publication number
US3326158A
US3326158A US391105A US39110564A US3326158A US 3326158 A US3326158 A US 3326158A US 391105 A US391105 A US 391105A US 39110564 A US39110564 A US 39110564A US 3326158 A US3326158 A US 3326158A
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motor
sewing machine
support bracket
cover
standard
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US391105A
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James S Graham
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Singer Co
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Singer Co
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/10Electrical or electromagnetic drives
    • D05B69/12Electrical or electromagnetic drives using rotary electric motors

Definitions

  • This invention relates to a sewing machine motor mounting system and more particularly to a means for mounting an electric motor outside the frame of a sewing machine.
  • motive power is furnished by an electric motor which is mounted within the hollow sewing machine frame.
  • the sewing machine frame serves to shield the motor from foreign particles and to prevent the operator of the sewing machine from viewing or contacting the electric motor or the motor mount.
  • the electric motor therefore, may be fabricated with a skeleton frame and the arrangement of the motor mount need not satisfy aesthetic requirements.
  • the sewing machine electric drive motor be located externally of the sewing machine frame, a problem arises in that the electrical components of the motor must be shielded and the shield as well as the motor mount are both visible and exposed to physical contact by the operator.
  • a still further object of the invention is toprovide a means in accordance with the foregoing objects to adjust the distance between centers of the rotor shaft of the motor and the main drive shaft of the sewing machine.
  • the objects of this invention are accomplished by providing a motor support bracket having an extension which is adjustably secured by vertically disposed slideway means to the standard of a sewing machine.
  • a skeletonized yet fully operative electric motor is connected to the motor support bracket by insulating means with the rotor shaft of the motor parallel to the main drive shaft of the sewing machine. All of the parts of the motor except the cover are ultimately connected to the field core which acts as a central skeleton.
  • a flexible belt is looped tautly around pulleys connected to the rotor shaft and the main drive shaft and the distance between centers of the shafts is adjustable by the adjustable connection of the motor support bracket to the slideway means.
  • the cover is secured to the motor support bracket in spaced relation about the skeletonized motor.
  • the foregoing arrangement permits skeletonized motors normally mounted within the sewing machine frame to be externally mounted.
  • a skeletonized motor when thus externally mounted possesses numerous favorable characteristics.
  • the cover is independent and spaced from the motor, there is much less chance of insulation breaking down between the motor and the cover causing the operator to receive an electrical shock from the cover.
  • the cover since it does not serve to support the motor can be conveniently composed of a nonconductive material such as plastic chosen particularly to eliminate the danger of electrical shocks from the cover.
  • the endless belt which is looped around the pulleys on the rotor shaft of the motor and the main drive shaft of the sewing machine is normally composed of a nonconductive material, the motor is insulated from the sewing machine as well. Another advantage is seen in that the cover is easily replaceable without disturbing the operative mounted relation of the motor relatively to the sewing machine.
  • FIG. 1 is a standard-end elevational view of a sewing machine incorporating the present invention
  • FIG. 2 is a fragmentary rear-side elevational view of the standard-end of the sewing machine of FIG. 1,
  • FIG. 3 is a vertical cross sectional view taken substan tially along the line 33 of FIG. 1, and
  • FIG. 4 is an exploded perspective view of the assembly of the motor cover to the motor support bracket.
  • the invention is illustrated as incorporated in a conventional family-type sewing machine having a frame including a work supporting bed 10 with a hollow standard 11 rising from one end.
  • a hollow bracket arm v12 is connected to the top of the standard and extends laterally over the work supporting bed.
  • a main drive shaft 13 Journaled in the hollow bracket arm 12 of the sewing machine is a main drive shaft 13 which extends longitudinally through the hollow bracket arm.
  • a handwheel 14 is secured to the standard-end of the main drive shaft, and formed in the handwheel is a pulley 15 which has a V-shaped groove 16.
  • a conventional A.C. series commutator-type motor 24 is utilized with the invention.
  • the motor is skeletonized yet fully operative and of the type that is mounted within the hollow standard of many sewing machines.
  • the motor 20 has a field core 21 and field windings 22.
  • Bearing brackets 23, 24 are secured to opposed ends of the field core by means of diametrically opposed screws 25.
  • a rotor shaft 26 is journaled in the bearing brackets 23, 24 by means of bearings 27, 28 having spherical bearing surfaces 29 and 30 respectively.
  • the bearings 27, 28 are held against the bearing brackets 23 and 24, respectively, by means of bearing retainer springs 31 and 32.
  • the spherical bearing surfaces of the bearings 27, 28 provide a self-aligning feature for the rotor shaft.
  • armature core 33 Pressed on the rotor shaft 26 is an armature core 33 containing armature windings 34.
  • the armature windings are connected to a commutator 35 secured on the rotor shaft.
  • Brushes (not shown) are housed in a stator box 36.
  • An outboard cooling fan 37 is pressed onto one end of the rotor shaft, and a pulley 38 having a V-shaped groove 39 is connected to the other end of the rotor shaft.
  • the aforesaid skeletonized motor 20 is mounted externally of the sewing machine frame by means of a motor support bracket which takes the form of a substantially flat plate 50.
  • the motor support bracket has an extension 51 with upper and lower reinforcing flanges 52 and 53, respectively.
  • a transverse elongated slot 54 is formed in the extension of the motor support bracket to mate with an elongated vertically disposed machined boss or rib 55 on the standard-end of the standard 11 of the sewing machine.
  • An intermediate portion 56 of the groove in the motor support bracket is widened to clear the threads of an adjusting screw 57 by which the motor support bracket is adjustably connected to the standard.
  • the adjusting screw 57 is provided with a spacer 58 to permit the hexagonal flange 59 of the adjusting screw to be conveniently gripped by a wrench.
  • the motor support bracket 58 has an aperture or hole 60 to clear the end of the rotor shaft 26 of the motor 20, and arcuate ventilation ports 61 are spaced around the rotor shaft clearance hole 60.
  • an eyelet 62 is formed in the motor support plate for a power cord, and a grommet 63 composed of an insulating material is disposed in the power cord eyelet 62.
  • the skeletonized motor 20 is mounted on the motor support bracket 50 by means of diametrically opposed screws 70 which extend through holes 71 in the motor support bracket.
  • the screws 70 engage a pair of insulat ing shock absorbers 72 which are in turn secured to the ends of the screws 25 by which the bearing brackets 23, 24 are connected to the field core 21.
  • a V-belt 73 is looped tautly around the pulleys and 38 which are secured on the main drive shaft 13 of the sewing machines and the rotor shaft 26 of the motor, respectively.
  • the skeletonized motor is covered by an independent cover 80 which is connected by means of diametrically opposed screws 81 to tabs 82 protruding from the motor support bracket 50.
  • the motor cover 80 has a ventilation duct 83 in one end to house the cooling fan 37 when the cover is connected to the motor support bracket.
  • the ventilation duct 83 communicates with a series of vertically disposed ventilation slots 84 in the end of the cover.
  • the cover is provided with a reinforcing rib 85 and may be composed of metal, plastic, or any other suitable material.
  • the nonintegral cover has the additional advantage that a conductive material may be coated on the inside 86 of the cover to shield electronic appliances such as radios and television sets from radio frequency waves radiated by the motor. It would be very difiicult to so coat the inside of a cover which is integral with a motor because of spatial and insulation complications.
  • the motor support bracket 50 with the skeletonized motor attached is adjusted vertically on the boss or rib 55 by means of the adjusting screw 57 to provide the correct amount of tension for the V-belt 73. If it should be desired to replace the motor cover 8t) for any reason, the motor cover can be easily removed from the motor support bracket by loosening the screws 81.
  • the ventilation slots 84 in the end of the cover and the 'ventilation ports 61 in the motor support bracket provide cross ventilation for air pulled into the cover by the cooling fan 37.
  • a motor mounting system for a sewing machine having a work-supporting bed, a hollow standard rising from one end of the work-supporting bed, a substantially hori- Zontal hollow bracket arm at the top of the standard overhanging the work-supporting bed, a shaft, means for journaling the shaft in the hollow bracket arm, a first pulley having a belt groove mounted on the shaft outside the standard on the side of the standard opposite from the overhang of the bracket arm, a belt, an elongated substantially vertical boss having a tapped hole also outside the standard on the side of the standard opposite from the overhang of the bracket arm, and a screw threaded into the tapped hole in the elongated boss on the standard, said motor mounting system comprising a field core, field windings on the field core, a bearing bracket connected to each end of the field core, a bearing mounted on each bearing bracket, a rotor shaft journaled in the bearings, an armature core mounted on the rotor shaft, armature windings on the armature
  • insulating means for connecting one of the bearing brackets to the motor support bracket with one end of the rotor shaft projecting through the aperture in the motor support bracket, a second pulley mounted on the rotor shaft on the side of the motor support bracket opposite from the bearing brackets, an extension on the motor support bracket having a transverse elongated slot formed therein for adjustably mounting the motor support bracket on the screw in the tapped hole in the elongated boss on the standard so that when the belt is looped around the first and second pulleys the distance between the centers of the pulleys can be adjusted, an independent motor cover, and means for mounting the motor cover on the motor support bracket in spaced relation from the bearing brackets, the field core, the field windings, the pair of brushes, the commutator, the armature windings, the armature core, and the rotor shaft.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

June 20, J GRAHAM SEWING MACHINE MOTOR MOUNTING SYSTEM 2 Sheets-Sheet 1 Filed Aug. 21, 1964 INVENTOR. JAMES S GRAHAM WITNESS June Q, 197 J. s. GRAHAM 3,326,153
SEWING MACHINE MOTOR MOUNTING SYSTEM Filed Aug. 21, 1964 2 Sheets-Sheet 2 I 3| 28 a a 27 38 :5 V 39 2e 37 INVENTOR. JAMES S. GRAHAM wjjyw .13
AT ORNEY Patented June 20, 1967 3326.158 SEWENG MACHINE MQTOR MOUNTING SYSTEM James S. Graham, Glasgow, Scotland, assignor to The Singer Company, New York, N.Y., a corporation of New Jer ey Filed Aug. 21, 1964. Ser. No. 391.105 Claims priority, application Great Britain, May 28, 1964, 22,022/64 1 Claim. (Cl. 112-220) This invention relates to a sewing machine motor mounting system and more particularly to a means for mounting an electric motor outside the frame of a sewing machine.
In one type of conventional sewing machine, motive power is furnished by an electric motor which is mounted within the hollow sewing machine frame. With this arrangement the sewing machine frame serves to shield the motor from foreign particles and to prevent the operator of the sewing machine from viewing or contacting the electric motor or the motor mount. The electric motor, therefore, may be fabricated with a skeleton frame and the arrangement of the motor mount need not satisfy aesthetic requirements.
When it is desirable or advantageous that the sewing machine electric drive motor be located externally of the sewing machine frame, a problem arises in that the electrical components of the motor must be shielded and the shield as well as the motor mount are both visible and exposed to physical contact by the operator.
In prior sewing machines which utilize an electric motor mounted externally of the sewing machine frame, it is conventional to construct the casing or other shield of the motor as an integral part of the motor and to utilize the motor casing to support the motor on the sewing machine. It is not convenient, therefore, with this conventional arrangement of construction and mounting of a drive motor externally of the sewing machine frame to utilize an electric motor with a skeleton frame of the type usually mounted internally of the sewing machine frame. It is usual therefore to employ a second line of motors for sewing machines having externally mounted motors with attendant higher costs of production caused by failure to take complete advantage of lower costs per unit with increased volume which is afforded by mass production.
It is an object of this invention to provide a novel and effective means for mounting an electric drive motor outside the frame of a sewing machine.
It is another object of this invention to provide a means for mounting outside the sewing machine frame an electric motor of the type having a skeleton frame usually intended for incorporation internally of the machine frame together with novel and effective provision for shielding the electric motor from foreign objects and to insulate the motor from the operator.
A still further object of the invention is toprovide a means in accordance with the foregoing objects to adjust the distance between centers of the rotor shaft of the motor and the main drive shaft of the sewing machine.
The objects of this invention are accomplished by providing a motor support bracket having an extension which is adjustably secured by vertically disposed slideway means to the standard of a sewing machine. A skeletonized yet fully operative electric motor is connected to the motor support bracket by insulating means with the rotor shaft of the motor parallel to the main drive shaft of the sewing machine. All of the parts of the motor except the cover are ultimately connected to the field core which acts as a central skeleton. A flexible belt is looped tautly around pulleys connected to the rotor shaft and the main drive shaft and the distance between centers of the shafts is adjustable by the adjustable connection of the motor support bracket to the slideway means. The cover is secured to the motor support bracket in spaced relation about the skeletonized motor.
.The foregoing arrangement permits skeletonized motors normally mounted within the sewing machine frame to be externally mounted. A skeletonized motor when thus externally mounted possesses numerous favorable characteristics. Because the cover is independent and spaced from the motor, there is much less chance of insulation breaking down between the motor and the cover causing the operator to receive an electrical shock from the cover. In fact, the cover, since it does not serve to support the motor can be conveniently composed of a nonconductive material such as plastic chosen particularly to eliminate the danger of electrical shocks from the cover. Since the endless belt which is looped around the pulleys on the rotor shaft of the motor and the main drive shaft of the sewing machine is normally composed of a nonconductive material, the motor is insulated from the sewing machine as well. Another advantage is seen in that the cover is easily replaceable without disturbing the operative mounted relation of the motor relatively to the sewing machine.
Other objects and a fuller understanding of the invention may be had by referring to the following description and claim, taken in conjunction with the accompanying drawings in which:
FIG. 1 is a standard-end elevational view of a sewing machine incorporating the present invention,
FIG. 2 is a fragmentary rear-side elevational view of the standard-end of the sewing machine of FIG. 1,
FIG. 3 is a vertical cross sectional view taken substan tially along the line 33 of FIG. 1, and
FIG. 4 is an exploded perspective view of the assembly of the motor cover to the motor support bracket.
With reference to the drawings, the invention is illustrated as incorporated in a conventional family-type sewing machine having a frame including a work supporting bed 10 with a hollow standard 11 rising from one end. A hollow bracket arm v12 is connected to the top of the standard and extends laterally over the work supporting bed.
Journaled in the hollow bracket arm 12 of the sewing machine is a main drive shaft 13 which extends longitudinally through the hollow bracket arm. A handwheel 14 is secured to the standard-end of the main drive shaft, and formed in the handwheel is a pulley 15 which has a V-shaped groove 16.
As shown in FIG. 3, a conventional A.C. series commutator-type motor 24 is utilized with the invention. The motor is skeletonized yet fully operative and of the type that is mounted within the hollow standard of many sewing machines.
Briefly, the motor 20 has a field core 21 and field windings 22. Bearing brackets 23, 24 are secured to opposed ends of the field core by means of diametrically opposed screws 25. A rotor shaft 26 is journaled in the bearing brackets 23, 24 by means of bearings 27, 28 having spherical bearing surfaces 29 and 30 respectively. The bearings 27, 28 are held against the bearing brackets 23 and 24, respectively, by means of bearing retainer springs 31 and 32. The spherical bearing surfaces of the bearings 27, 28 provide a self-aligning feature for the rotor shaft.
Pressed on the rotor shaft 26 is an armature core 33 containing armature windings 34. The armature windings are connected to a commutator 35 secured on the rotor shaft. Brushes (not shown) are housed in a stator box 36. An outboard cooling fan 37 is pressed onto one end of the rotor shaft, and a pulley 38 having a V-shaped groove 39 is connected to the other end of the rotor shaft. Thus, all of the internal parts of the motor are ultimately connected to the field core 21 which acts as a central skeleton.
The aforesaid skeletonized motor 20 is mounted externally of the sewing machine frame by means of a motor support bracket which takes the form of a substantially flat plate 50. The motor support bracket has an extension 51 with upper and lower reinforcing flanges 52 and 53, respectively. A transverse elongated slot 54 is formed in the extension of the motor support bracket to mate with an elongated vertically disposed machined boss or rib 55 on the standard-end of the standard 11 of the sewing machine. An intermediate portion 56 of the groove in the motor support bracket is widened to clear the threads of an adjusting screw 57 by which the motor support bracket is adjustably connected to the standard. The adjusting screw 57 is provided with a spacer 58 to permit the hexagonal flange 59 of the adjusting screw to be conveniently gripped by a wrench.
The motor support bracket 58 has an aperture or hole 60 to clear the end of the rotor shaft 26 of the motor 20, and arcuate ventilation ports 61 are spaced around the rotor shaft clearance hole 60. In addition, an eyelet 62 is formed in the motor support plate for a power cord, and a grommet 63 composed of an insulating material is disposed in the power cord eyelet 62.
The skeletonized motor 20 is mounted on the motor support bracket 50 by means of diametrically opposed screws 70 which extend through holes 71 in the motor support bracket. The screws 70 engage a pair of insulat ing shock absorbers 72 which are in turn secured to the ends of the screws 25 by which the bearing brackets 23, 24 are connected to the field core 21. A V-belt 73 is looped tautly around the pulleys and 38 which are secured on the main drive shaft 13 of the sewing machines and the rotor shaft 26 of the motor, respectively.
The skeletonized motor is covered by an independent cover 80 which is connected by means of diametrically opposed screws 81 to tabs 82 protruding from the motor support bracket 50. The motor cover 80 has a ventilation duct 83 in one end to house the cooling fan 37 when the cover is connected to the motor support bracket. The ventilation duct 83 communicates with a series of vertically disposed ventilation slots 84 in the end of the cover. The cover is provided with a reinforcing rib 85 and may be composed of metal, plastic, or any other suitable material. The nonintegral cover has the additional advantage that a conductive material may be coated on the inside 86 of the cover to shield electronic appliances such as radios and television sets from radio frequency waves radiated by the motor. It would be very difiicult to so coat the inside of a cover which is integral with a motor because of spatial and insulation complications.
In operation, the motor support bracket 50 with the skeletonized motor attached is adjusted vertically on the boss or rib 55 by means of the adjusting screw 57 to provide the correct amount of tension for the V-belt 73. If it should be desired to replace the motor cover 8t) for any reason, the motor cover can be easily removed from the motor support bracket by loosening the screws 81. The ventilation slots 84 in the end of the cover and the 'ventilation ports 61 in the motor support bracket provide cross ventilation for air pulled into the cover by the cooling fan 37.
lthough the invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention.
What is claimed is:
A motor mounting system for a sewing machine having a work-supporting bed, a hollow standard rising from one end of the work-supporting bed, a substantially hori- Zontal hollow bracket arm at the top of the standard overhanging the work-supporting bed, a shaft, means for journaling the shaft in the hollow bracket arm, a first pulley having a belt groove mounted on the shaft outside the standard on the side of the standard opposite from the overhang of the bracket arm, a belt, an elongated substantially vertical boss having a tapped hole also outside the standard on the side of the standard opposite from the overhang of the bracket arm, and a screw threaded into the tapped hole in the elongated boss on the standard, said motor mounting system comprising a field core, field windings on the field core, a bearing bracket connected to each end of the field core, a bearing mounted on each bearing bracket, a rotor shaft journaled in the bearings, an armature core mounted on the rotor shaft, armature windings on the armature core, a commutator mounted on the armature shaft, a pair of brushes, means for mounting the brushes on one of the bearing brackets so that the brushes contact the commutator, a motor support bracket having an aperture formed therein,
, insulating means for connecting one of the bearing brackets to the motor support bracket with one end of the rotor shaft projecting through the aperture in the motor support bracket, a second pulley mounted on the rotor shaft on the side of the motor support bracket opposite from the bearing brackets, an extension on the motor support bracket having a transverse elongated slot formed therein for adjustably mounting the motor support bracket on the screw in the tapped hole in the elongated boss on the standard so that when the belt is looped around the first and second pulleys the distance between the centers of the pulleys can be adjusted, an independent motor cover, and means for mounting the motor cover on the motor support bracket in spaced relation from the bearing brackets, the field core, the field windings, the pair of brushes, the commutator, the armature windings, the armature core, and the rotor shaft.
References Cited UNITED STATES PATENTS 1,520,949 12/1924 Hemleb. 1,962,880 6/1934 Schwab et al. 2,298,155 1 0/1942 Perkins 112-220 X 2,604,862 7/1952 Merson et al. 2,739,552 3/1956 Sailer 112-220 3,238,434 3/1966 Blitz et al 31089 X OTHER REFERENCES Data Sheet #139, Magnetic Shield Div. Perfection Mica Co., dated May 1958, copy in class 310-85, 2 pp.
PATRICK D. LAWSON, Primary Examiner.
JORDAN FRANKLIN, Examiner.
H. H. HUNTER, Assistant Examiner,
US391105A 1964-05-28 1964-08-21 Sewing machine motor mounting system Expired - Lifetime US3326158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22022/64A GB1002995A (en) 1964-05-28 1964-05-28 A motor drive arrangement and means for mounting same on a sewing machine

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US3326158A true US3326158A (en) 1967-06-20

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US391105A Expired - Lifetime US3326158A (en) 1964-05-28 1964-08-21 Sewing machine motor mounting system

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US (1) US3326158A (en)
CH (1) CH432209A (en)
DE (1) DE1926573U (en)
FR (1) FR1440246A (en)
GB (1) GB1002995A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469036A (en) * 1982-10-04 1984-09-04 The Singer Company Electrically isolating sewing machine motor mount
DE29604747U1 (en) * 1995-09-08 1996-05-09 Frankl & Kirchner GmbH & Co KG Fabrik für Elektromotoren u. elektrische Apparate, 68723 Schwetzingen Add-on motor for sewing machines
EP0761861A1 (en) * 1995-09-08 1997-03-12 Frankl & Kirchner GmbH. & Co. KG Fabrik für Elektromotoren und elektrische Apparate Motor mounting for sewing machines

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520949A (en) * 1920-05-24 1924-12-30 Singer Mfg Co Motor support
US1962880A (en) * 1931-06-20 1934-06-12 Schwab Max Electric drive for household sewing machines
US2298155A (en) * 1940-09-18 1942-10-06 Singer Mfg Co Electric drive for sewing machines
US2604862A (en) * 1946-12-12 1952-07-29 Irving J Moritt Miniature power-driven sewing machine
US2739552A (en) * 1953-04-16 1956-03-27 Singer Mfg Co Motor drives for sewing machines
US3238434A (en) * 1962-03-09 1966-03-01 Sanders Associates Inc Rf suppression apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520949A (en) * 1920-05-24 1924-12-30 Singer Mfg Co Motor support
US1962880A (en) * 1931-06-20 1934-06-12 Schwab Max Electric drive for household sewing machines
US2298155A (en) * 1940-09-18 1942-10-06 Singer Mfg Co Electric drive for sewing machines
US2604862A (en) * 1946-12-12 1952-07-29 Irving J Moritt Miniature power-driven sewing machine
US2739552A (en) * 1953-04-16 1956-03-27 Singer Mfg Co Motor drives for sewing machines
US3238434A (en) * 1962-03-09 1966-03-01 Sanders Associates Inc Rf suppression apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469036A (en) * 1982-10-04 1984-09-04 The Singer Company Electrically isolating sewing machine motor mount
DE29604747U1 (en) * 1995-09-08 1996-05-09 Frankl & Kirchner GmbH & Co KG Fabrik für Elektromotoren u. elektrische Apparate, 68723 Schwetzingen Add-on motor for sewing machines
EP0761861A1 (en) * 1995-09-08 1997-03-12 Frankl & Kirchner GmbH. & Co. KG Fabrik für Elektromotoren und elektrische Apparate Motor mounting for sewing machines
US5711237A (en) * 1995-09-08 1998-01-27 Frankl & Kirchner Gmbh & Co Kg Fabrik Fur Elektromotoren U. Elektrische Apparate Flange motor for sewing machines

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FR1440246A (en) 1966-05-27
GB1002995A (en) 1965-09-02
DE1926573U (en) 1965-11-04
CH432209A (en) 1967-03-15

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