US1730141A - Motor-geared sewing machine - Google Patents

Description

Oct. l, 1929. c. w. HDOUBLER/ r1,730,141

MOTOR GEARED SEWING IIIA/CHINE Filed July 2, 1925 ma m" v VAT g IN VEN TOR.

TTORNEY Patented Oct. 1, 1929 PATENT oFFics CHARLES W. HDOU'BLER, OF RACINE, WISCONSIN MOTOR-GEARED SEVJING MACHINE Application led July 2,

This invention relates to improvements in motor geared sewing machines.

It is one of the objects of the present invention to provide a motor geared sewing machine in which the motor and driving mechanism is positioned within the arm of the sewing machine.

A further object of the invention is to provide a motor geared sewing machine in which 1o the driving connection may be easily connected to and disconnected from the sewing machine shaft in a very simple manner and eXteriorly of the arm of the sewing machine.

A further object of the invention is to pro- 15 vide a motor geared sewing machine. in which the armature of the motor is journaled entirely in the arm of the sewing machine.

A further object of the invention vis to provide a motor geared sewing machine in which 20 the sewing machine shaft is provided with a squared portion for connecting the clutch member thereto.

A further object of the invention is to provide a motor driven sewing machine having a friction driven bobbin-winder which may be rotated during the operation of the machine or while the sewing machine is disconnected.

A further object of the invention is to provide a motor geared sewing machine which is very compact, is strong and durable, and inexpensive to manufacture, and is well adapted for the purpose described.

With the above and other objects in view, the invention consists of the improved motor geared sewing machine and its parts and combinations as set forth in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Fig. 1 is a side view, partly taken on section line 1--1 of Fig. 2, of a portion of the standard and arm of a sewing machine enclosing 45 the motor and gearing;

Fig. 2 is a rear view thereof with the hand wheel removed;

Fig. 3 is a vertical sectional detail view showing a portion of the cranked shaft and 50 parts connected thereto; and

lpartment 17 closed by an inner cover 18 se- 1925. Serial No. 41,096.

Fig. 4 is a sectional detail view of the clutch mechanism.

Referring to the drawing, thev numeral 8 indicates a tubular standard of a sewing machine, and 9 a tubular arm communicating with the standard and projecting therefrom, said parts forming the head of the machine. The upper portion of the standard is formed with a side extension 10 to provide space for receiving an electric motor 11 mounted therein. AThe rear portion of the extension and the corresponding portion of the standard in horizontal alinement therewith are opened and closed by a cap or cover 12 which is secured in position by screws 13. Said ycap is recessed into the parts, as at 12', to hold the parts in alinement. The armature shaft 14 of the motor yis journaled in the extension 10 and in the cap 12, and the motor is maintained in position byscrews 15 which thread into r portions of the extension. The extension and cap are also provided with oil cups 16 for lubricating the armature shaft 14. The cap 12 is formed on its inner, side with a gear comcuredto the outercap by screws 19. A train Iof gears2(), 21, 22,A 23 and 24 are positioned l,within the compartment, and are intermes'hed to transmit motion from the armature shaft 14 to the cranked sewing machine drive shaft Y 25, andf'also to the bobbin-winderv friction wheel 26 whichprojects outwardly a slight distance. through an'elongated opening 27 formed in a side portionof the cap 12. The

gear is looselyjournaled on the sewing ma- Y chinel shaft and the gearv or pinion 23 is mounted fast on the armature shaft 14 while the gears 21 and 22 are lconnected together and are mounted on the short shaft 28 journaled the wheel of larger diameter and be thrown i" ofi' therefrom by centrifugal force in the compartment and against the gears therein. Commutator brushes 11 are also mounted in the side extension 10.

The gear 20 is mounted on and forms part of a jawed clutch member 31 which is journaled on the cranked sewing machine shaft 25 between the cap bearing 12 and shoulders 32 formed by a squared or rectangular portion 33 of the shaft 25. has slidably mounted thereon a j awed clutch member 34 complementary to the clutch member 31 and which member 34 may he moved into clutching engagement with the member 31 to lock the gear 20 to the shaft 25 when it is desired to run the machine.` The member 34 is formed with a squared bore 34 to fit the squared shaft portion 33 and turn therewith. The clutch member 34 is also formed with an annular groove 35 to receive a semicircular shoe 36 positioned therein. A medial portion of the shoe is formed with an outward projection 36 which extends through a rectangular' opening 37 in the operating lever 38. Said lever is pivotally connected at its lower end to the cover 18 of the cap 12 as indicated by the numeral 39 while the upper end eX- tends through an elongated opening 40 in the upper portion of the sewing machine .arm 9 as clearly indicated in Fig. 1.

An arm 41 pivotally and frictionally connected to the standard 8 by a pivot bolt 42 has journaled in its upper end a bobbin shaft 43 for receiving ordinary bobbins (not shown), and said shaft has mounted fast thereon a rubberbanded friction wheel .44 which frictionally engages the wheel 26 and is rotated thereby when the arm 41 is yswung upwardly.

A hand wheel 45 is mounted on the outer end of the cranked shaft for turning or stopping the shaft manually. As thus constructed the entire rotary parts of the machine can be disconnected from the motor and remain at rest while the motor is running and the bobbin winder can be rotated through the gears whether or Vnot the sewing machine elements are in operation.

VFrom the foregoing description it will be seen that the motor is mounted entirely in the arm of theI machine but can be easily removed by taking off the end cap. Furthermore the end cap compartment also provides for the easy removal of all of the gears as a unit in a very simple manner, and the location of the gears and the motor do not interfere with the other portions of the sewing machine. The squared portion of the sewing machine shaft eliminates the use of keys or screws and provides a simple connection for the clutch member.

What I claim as my invention is:

1. A motor geared sewing machine, comprisinga tubular sewing machine head hav ing a` rearopenvend portion, a cap closing Said squared portiony said end, a horizontal drive'shaft journaled in the head and the cap, and having a rectangular portion, a clutch member slidably, but nonerotatably mounted on the shaft, a gear wheel journaled on the shaft and having a complementary clutch portion engageable by the clutch member to lock the gear to the shaft, means for moving said clutch member into and out of engagement with the clutch portion, an electric motor journaled entirely in the head and the cap and having its shaft parallel to the drive shaft, and a train of gears connecting Athe motor shaft to the gear wheel on the horizontal drive shaft.

2. A motor gea-red sewing machine, comprising a tubular sewing machine head having a rear open end portion, a cap closing said end and having an inner compartment, a horizontal drive shaft journaled in the head and cap and extending through the compartment, a clutch member slidably but non-ro-V tatably mounted on the drive shaft, a gear Wheel positioned in the compartment and journaled on the drive shaft and having a complementary clutch portion engageable by the clutch member to lock the gear to the shaft, means for moving said clutch member into and out of engagement with the clutch portion, an electric motor entirely within the head and having its shaft parallel to the drive shaft and journaled in the head andr eXtending through the compartment and journaled inthe cap, and a train of gears within the cap compartment and connecting the motor shaft to the gear wheel on the drive shaft.

In testimony whereof, I affix my signature. l L

CHARLES w. HDOUBLER.

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