US1240802A - Electric motor. - Google Patents

Description

' F. I. (isms.

ELECTRIC MOTOR. I APPLICATION FILED MAR. 26, I915.

Patented Sept. 18, 1917.

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F. J. OSIUS. ELECTRIC MOTOR.

APPLIQATION FILED MAR. 26 19 5.

Patented Sept. 18,1917.

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ATTUR /ZY5 U ED STATES ,PATEN ,FFIcE.

FREDERICK J.. osIUs', or me e, WISCONSIN.

ELECTRIC MOTOR.

Specification of Letters Patent. Patented Sept, 18, 1917,

Application filed March as, 1915. Serial'No. 17,095.

- To all whom it may concern.

,Be it known that I, FREDERICK J. OSIUS,

a citizen of the United States and resident not solely, adapted for driving sewing ma chines and other light mechanism.

It is one of'the objects of the present in vention to provide an electric motor of the universal type which is adapted to aut'omati Cally fit and actuate the various makes of sewing machines now on the market with out the use. of attachments of any kind.

vA- further object of the invention is to provide an electric motor which may be placed upon the stand of a sewingmachine with its driving pulley in frictional contact with the hand wheelof the sewing machine to actuate the said machine without requir X ing the use of means forattaching themotor to the stand or other parts; of the machine.

A further object of .the invention is to provide an electric ,motor of the .portable typewhich is so-constructed as to automati- Cally adapt itself to fit the various types of machines now on the market and which mo- .tor will automatically clamp oriexert a presv sure upon the support to maintain the mo-- tor in a predetermined working position -with relation to the Wheel of the machine to be driven.

A furtherobject of the invention is to pro vide an electric motor with a supporting frame or base of stepped formation shaped and constructed to fit all of the various styles of sewing machine stands now on the market. I I

A further object of the invention isto provide an electric motor which is pivotally,

"- yieldingly mounted upon its support and is provided with a drive adapted to frictionally engage the driving wheel of the mechanism to. be actuated. i A further ob ect of the invention is to provide an electric motor which is, of simple construction is strong and durable and is well adapted for the purpose described.

With the above and other objects in view, the invention consists of the improved electric motprand its parts and combinations as set forth in the claims andall equivalents thereof. I

In the accompanying drawing in which thesame reference characters indlcate the same parts in all of the views:.

Figure-lis a side view of the improved motor shown mounted upon a sewing ma chine stand, the sewing'machme and stand being indicated by dotted lines and a por-.

tion of the motor being'shown in section; Fig. 2 is a vertical sectional view of the electric motor taken on line 2-2 of Fig. 1;

Fig. 8 is a transverse sectional view taken on line 33 of Fig. 1;

Fig. 4. is an enlarged vertical sectional view of the motor taken on line/l4 of 1 ing machine, the-sewing machine being indicated in dotted lines;

Fig. 7. is a vertical sectional view thereof taken on line 66 of Fig. 5;

Fig. 8 is a detail view of a modified form of motor support;

Fig. 9-is a side view of a modified form of electric motor.

. Referring tothe drawingthe numeral 10 indicates asewing machine stand, 11 the arm or a portion ofthe frame, 12 the hand or driving wheel of thesewing machine and 13 the improved electric motor. The improved electric'motor comprises in part the stepped curved base or supporting member 14:, the motor casing 15 and the armature shaftlG journaled in said casing and extending therethrough at one end. The motor casing in the preferred form is pivotally connected to the supporting member by means of a pivot bolt 17 which is secured at one end to a projection 18 of the motor casing and extends transversely and beneath said casing and through eyed ears 19 of said supporting member. A screw 20 passing through the bolt and entering the projec- ,tion firmly secures the pivot bolt 17 to said projection 18. A coiled spring 21surrounding the bolt and interposed between the ears and having one end engaging the bolt and the other'end bearing against the support serves toyieldingly hold the forward end portion 22 of the motor casing tilted upwardly and the forward portion of the base clampingly pressing downwardly. The pro jecting end portion of the shaft 16 is provided with a slightly grooved pulley 23 preferably formed of cork orother yielding material.

The motor is placed upon the sewing machine stand with the pulley frictionally engaging the lower peripheral edge of the sewing machine hand wheel while under tension of the tilting spring so that when cur-.

rent is switched to the motor the sewing machine will be actuated. By means of the yielding tilting motor construction the pulley automatically adjusts itseif to hand 'whe'els at varying heights from the stand and thus the motor is adapted to fit all makes of sewing machines now in use, and the yielding construction also provides for the base clampingly engaging the support.

In order to prevent the vibration of the sewing machine from causing the motor to v slide out of position on the stand the legs verse the directionof rotation of'the armation of the motor is adapted to be controlled 24 of the base or support are provided with projecting rubber knobs 25 which bear upon the stand. The base at a medial and higher plane or step is also provided with similar knobs 25 which are adapted to rest upon and engage a stand of'less length than the one shown. lVhen thus used the outer legs will hang over the edge of the stand and the rear portion of the base will be supported upon the said knobs 25.

lower contact'plates 3O and-30 which are connected -to-the field windings 31 and 31 of the motor. For convenience in changing thedirection of rotation of the motor the brush holders 32 project through elongated openings 33 provided in the casing, and may be easily moved by the user.

The brush ring and brushes are held in adjusted positions by means of a set screw 34 which is threaded through the end of the casing and ring 27 Electric current is supplied to the motor by wires-34"leading to a source of electrical supply (not shown) and the speed of rotaimpinges against the brush in any manner desired.

In the modified form shown in Figs. 6 and 7 the motor casing 15 is rigidly conneeted to the support and the forward legs of the support are provided with yielding bolts 35 (only one being shown) which serve to yieldingly hold the driving pulley 23 in frictional contact with the sewing machine hand wheel 12 and drive the same, and the forward legs clampingly in engagement with the support of the machine. The yielding feature. of the bolts with relation to the support also serves to accommodate the motor to machines having hand wheels which vary in height from the stand.

The bolts 35 extend loosely through the legs of the support and are surrounded with coiled springs 36 which are interposed between the heads of the bolts and the support. The modification illustrated in Fig. 8 is similar to the form just described with the exception that the bolts 37 (only one being shown) are threaded through the support and are turned to tilt the motor upwardly and the motor pulley 23 yieldingly into engagement with-the hand wheel of the sewing machine. a k

In this construction the cork or other material of the pulley provides the yielding engagement between the wheels, and the screws the clamping engagement between the motor and the support of the machine. 1

Another modification is shown in 'Fig. 9 in which the motor is mounted in vertical position and the driving pulley 38 is yieldingly splined on'the motor shaft 16 and is adapted to be positioned below the hand wheel of the machine in the manner shown in Fig. 9. A coiled spring 39 surrounding the motor shaft and interposed between the pulley 38 and the motor casing iii serves to yieldingly hold the said pulley in its upper most position and the base clampingly in engagement with the support. r

In this last mentioned form of motor the speed of rotation of the sewing machine may be controlled by moving the motor toward or away from the hand wheel 12 thus locating the driving contact closer to or farther from the center of the motor ulley.

While the electric motor as been described as particularly adapted for use in driving sewing machines it is to be, under,- stood that it may also be used in driving other kinds of machine's without departing from the spirit and scope of the invention.

In operation it is only necessary to osition the improved motor upon the tab e or support of the mechanism to bh driven with the motor driving pulley engaging the lower peripheral portion of the wheel of the mechanism to be driven. In this osition the driving pulley will be yielding y held up- -wardly in engagement with the wheel and oppositely the force holding the pulley upwardly will impart a tendency to the base or support of the motor to clampingly engage the support of'the mechanism being driven, thus maintaining the motor in a working position without the necessity of using fastening means or marring the driven -machine in any manner. Asthe pulley of the motor has comparatively a considerable range of movement upwardly with relation to its base the motor automatically adjusts itself to suit varying distances between frame and wheel in various machines. The stepped formation of the base member provides for resting the motor upon machine tables or framesv having offset portions or planes or upon tables which vary in length from the machine arm tothe adj acent .outer endofthe table thus forming in substance a'portable, universal motor for operating various types and kinds of machines.

From the foregoing description it will be seen that the invention is of simple construc tion and is well adapted for the purpose described. L

1 What Iclaim as "my invention is;

1.. An electric motor, comprising a support having a plurality of projecting knobs extending indifferent planes, a motor memtioned on a higher plane than other of said knobs. a motor member pivotally mounted .the motor'member in a direction toward the ber pivotally mounted thereon and provided with a yielding friction driving pulley, and means for yielding-1y tilting the pulley portion of the motor member ina direction toward the wheel to .be driven thereby.

-2. An electric motor, comprising a support having a plurality of downwardly projecting knobs, some of said knobs being posion the support and provided'with a yielding friction driving pulley, and a coiled spring engaging the support and the motor member for'yieldingly tilting-the pulley portion of wheel to befdriven thereby.

3. An electric'motor, comprising a support having a plurality of downwardly projecting yielding knobs, some of said knobs being positioned on a higher plane than other of said knobs, said support also provided with eyed ears, a motor member having 'a transversely extending pivot bolt which extends through the eyed ears and pivotally connects the motor member to the support, said motor member also having a yielding friction driving pulley, and a coiled spring surrounding the'piv-ot bolt and having'oneof its ends engaging the support and the other end'enga'ging the motor member for yieldinglytilting the pulley portion of the .motor member in a direction toward the wheel to be driven thereby.

.4. An electric motor, comprlsing a base member having a plurality-of support engaging portions extending in difi'erenthorizontal planes, a motor member mounted upon the base member and provided with a driving pulley, and means for automatically moving the pulley portion of the motor member toward and into driving engagement with the Wheel to be driven thereby.

5 An electric motor, comprising a base member having a plura ity of support engaging portions extending in difierent horizontal planes, and'a motor member pivotally mounted upon the base member'and pro vided with a shaft and friction driving pultoward and into direct frictional driving engagement with the wheel to, be driven thereby.

6. An electric motor, comprising a base member having a plurality of support engaging portions, some 'ofsaid portions extending in'the same horizontal plane' and other of said portions extending in a,

difierent horizontal plane, and a motor member pivotally mounted upon the base a member and provided with a shaft and a friction driving pulley mounted thereon which is automatically tiltable toward and into direct frictional driving engagement with the wheel to be driven thereby.

7. An: electric motor, comprising a base ,ley thereonwhich is -automatically'tiltable member having a plurality of support engaging portions extending in difierent horiv zontal planes, a motor member positioned above the base member and provided with a shaft and a driving pulley mounted thereon, a pivot pin pivotally connecting the motor member to the base member, and means for automatically tilting the driving pulley toward and into direct frictional driving engagement with the wheel to be driven therebyand for imparting a tendency to the base member toclampingly engage the support upon which the motor rests.

member having a plurality of support engaging portions extending in diflerent horizontal planes, a motor member positioned above the base member and provided with a shaft and a driving pulley mounted thereon, a pivot pin pivotally connecting the motor member to. the base member, and acoiled spring surrounding the pivot mem-' ber for automatically tilting the driving pulley toward and into driving engagement with the wheel to be'driven thereby and for imparting a tendency to the base member to clampingly engage the support upon which the motor rests.

9. The combination with the frame and the wheel of a machine to be driven, of a motor member andv its shaft and a driving wheel thereon. and a base member on which the motor member is mounted, said base 8. An electric motor, comprlsing a base I motormember and its shaft and a driving .wheel thereon, a base member on which the motor member is. mounted, and means for causing the. base member and the driving .wheel to oppositely engage the machine frame andthe machine wheel to clampingly maintain the driving wheel in engagement with the machinewheel and the base'memher in engagement with the frame.

11;.- The combination withvthe frame and the wheel of a machine to be driven, of. a

motor member and itsshaft andfa driving wheel thereon, and a base member on which the motor is yieldingly mounted, saidmotor memberand base member coacting to cause. the .motor wheelv to yieldingly and drivingly engage the machinewheel and the motor baseto clampingly engage the frame of the machine.

a the wheel of machine to be driven, Of a motor member and its shaft and a driving '12. The combination with the frame and wheel secured to and turning with the shaft thereof, and a base member on which the motor member is pivotally mounted, said motor member andbase member .coacting to cause the motor wheel to yieldingly and drivingly. engage the machine 'wheel and' thebase member to clampingly engage the frame of the machine. I I 13; The combination with the frame and the wheel of-a machine to be driven, of a motor member and its shaft and a driving wheel secured to' and turning with the shaft thereof, acbase member positioned below the .motor member, {a pivot pin pivotally connecting the motor'member to the base -member, and a-coiled spring surrounding a the pivot pin and coacting with both memhers to cause the motor wheelto yieldingly and drivingly engage the machine wheel and the base'member to clampingly engage the frame of the machine. a

14. The combination with the frame and the wheel of a machine to be driven, of a 'motor member and-its shaft and a driving wheel secured to and turnin with the shaft, a. base member having a p urality ofsupport engaging portions extending in different horizontal planes, said base-member also provided with eyed ears, a motor member having aitransversely extending pivot pin which extends through the eyed ears and pivotally connects the motor member to 1 the'base member, said motor member also having a yielding friction driving wheel, and a coiled spring surrounding the pivot pin and having one of its ends engaging the base member and the other end engaging the 'motormember for yieldingly tilting the motor wheel into engagement with the ma- "chine wheel and the base member clampingly into. engagement with the machine frame. v

15. The combinationwith the frame and the wheel of a machine to'be driven, the lower portion of said wheel being positioned above a portion of the frame, of ajmotor member and its shaft and a driving wheel. secured to and turning with-the shaft there- FREDERICK J, OSIUS.

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