US1975744A

US1975744A - Electric sewing machine

Info

Publication number: US1975744A
Application number: US615097A
Authority: US
Inventors: Herbert J Goosman
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1932-06-03
Filing date: 1932-06-03
Publication date: 1934-10-02
Anticipated expiration: 1951-10-02

Description

\ H. J. GOOSMAN ELECTRIC SEWING MACHINE Oct. 2, 1934.

Filed June 5, 1952 3 Sheets-Sheet 1 amt/H M Herbert J Goosman 1934- H. J, GOOSMAN ELECTRIC SEWING MACHINE Filed June 3, 1932 5 Sheets-Sheet 2 jvwem/kw Herbert (Z Q0 Osman Oct. 2, 1934. H. J. GOOSMAN ELECTRIC SEWING MACHINE Filed June 3, 1952 Herbert dqoosma n WW,% W

Patented Get. 2, 1934 NlTED STATES ELECTRIC SEWING MACHINE Herbert J. Goosman, Elizabeth, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Application June 3, 1932, Serial No. 615,097

10 Claims.

This invention relates to electric motor-driven sewing machines and has for an object to provide a simplified and improved machine of this type which is comparatively inexpensive to manufacture and assemble and which embodies a maximum of desirable operative characteristics.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

Fig. 1 is a side elevation, partly in section, of a sewing machine embodying the invention. Fig. 2 is a bottom plan view of the machine. Fig. 3 is a transverse vertical section through the machine bed, showing the feeding mechanism. Fig. 4 is a transverse vertical section through the bed and gooseneckstandard. Fig. 5 is a view similar to Fig. 4 showing the motor disconnected from the machine for bobbin winding. Fig. 6 is a rear end elevation of the gooseneck and superimposed motor. Fig. '7 is a top plan view of the motor and the bobbin-winder carried thereby, and Fig. 8 is a section on the line 8-8, Fig. 5.

The machine illustrated is constructed with a frame including the bed 1 from which rises the standard 2 of a hollow gooseneck having the overhanging arm 3 terminating in the head 4 in which are mounted the usual reciprocating needle-bar 5,and presser-bar 6 carrying, respectively, the needle 7 and presser-foot 8. The needle bar 5 is-preferably connected by means 'of the usual link 9 to the crank 10 on the upper rotary shaft 11 which is journaled within the horizontal member 3 of the gooseneck and has the balance-wheel 12 fixed to its rearwardly projecting free end. The usual needle-thread take-up 13 may also be mounted within the head 4 and actuated by the shaft 11 in the usual manner.

Cooperating with the reciprocating needle 7 is a suitable loop-taker which may take the form of a two-to-one rotary hook 14 supporting the usual stationary thread-case l5 and fixed to the short vertical shaft 16 journaled in the bushing 17 in the bearing lug 18 below the bed 1. The shaft 16 has fixed to its lower end a bevel gear 19 with which meshes the driving bevel gear 20 of double its pitch diameter. The driving gear 20 is fixed to the lower rotary shaft 21 which is journaled in the bushings 22 carried by bearing lugs 23 below the bed 1.

The upper and lower rotary shafts 11 and 21 are connected together in one-to-one timed relation by means of the intermediate upright shaft 24 which is journaled in the bushings 25 in the upright frame member 2. Fixed to the upright shaft 24 are the upper and lower

spiral gears

26, 27, respectively, which mesh with the upper and

lower gears

28, 29, respectively, fixed to the upper and lower shafts 11 and 21. The intermediate upright shaft 24 is supported upon the lower adjustable thrust-bearing screw 30, Fig. 4, and is formed at its upper end, which terminates within the gear 26 with a diametrical coupling slot 31, Fig. 5, adapted to receive the diametrical rib 32 at the lower end of the power-shaft 33 of the driving motor A, to be hereinafter described.

The feeding mechanism is of the usual construction and includes the feed-dog 34 fixed to the feed-bar 35 which is fulcrumed at 36, Fig. 3, upon the feed-rocker 37, fulcrumed, in turn, on the trunnion screws 38 below the bed 1. The feed-rocker 37 includes the short horizontal arm 39 to which is pivotally connected at 40 the lower end of the pitman 41, the forked upper end of which embraces the feed-cam 42 on the upper rotary shaft 11. The pitman 41 carries the usual roller 43 which works in the slot 44 of the feed-adjusting block 45 fulcrumed at 46 in the standard 2 and having a downwardly projecting arm 4'7 which carries a laterally projecting pin 43 entering a groove 49 in the inner end of the feed-adjusting screw 50. The feed-bar 35 is supported at its rearward end by means of a roller 51 embraced by the forked arm 52 fixed to the feed-lift rock-shaft 53 supported on the trunnion screws 54 below the bed 1. Fixed to the feed-lift rock-shaft 53 is an arm 55, the forked extremity of which embraces the feed-lift cam 56 on the lower rotary shaft 21.

The gooseneck 2 is formed in its upper wall, at the juncture of its vertical and horizontal arms 2 and 3, with an aperture 5'7 which partially receives the motor A and the rim of which constitutes a seat for the flange 58 of the frame of the motor A. The power-shaft 33 of the motor is journaled in the upper and lower bearing bushings 59 and 60 in the motor-frame and carries the usual armature 61 and commutator 62. The armature is embraced by the usual field-core 61' excited by the field-coils 61". The

shafts

24 and 33, taken together, constitute a sectional motoror power-shaft. The motor-shaft 33 has fixed thereto, above the armature 61 and below the bearing bushing 59, a friction driving disk 64 which is adapted to be engaged by the frictionwheel 65 of the bobbin-winder to be described.

Pinned to the upper end of the motor-shaft 33' is a collar 66 under which extends a lip 67 on the inner end of the manually operated rocking pin 68 journaled in the motor-frame A, having fixed to its outer end a knurled head 69 which may be grasped by the operator and turned from the position shown in Fig. 4 to that shown in Fig. 5 to lift the motor-shaft and uncouple the diametrical rib 32 at its lower end from the diametrical slot 31 at the upper end of the intermediate shaft 24, for bobbin-winding purposes. The rocking pin 68 is formed with a circumferential groove 68 entered by the tip 68 of the stop-screw 68. The groove 68* is interrupted at one point by a stop-pin 68 which strikes the tip 68" of the stop-screw 68 and prevents overthrow of the pin 68 past the position shown in Fig. 8 in which the motor-shaft 33 is fully raised by the lip 67.

Journaled on the pivot-screw Z0 fixed to the post '11 on the motor-frame is the upright springbiased lever '12 in which is journaled the bobbinsupporting spindle 73 carryin the friction wheel 65, previously referred to. The arm '12 is detained in its lower position, Fig. 6, with its frictionwheel 65 in engagement with the disk 64 on the raised motor-shaft 33 by means of the springbiased latch 7-1 fulcrumed on the pivot-screw 75 carried by the post 76 on the motor-frame. The latch 74 has rigidly fixed to it a tripper-arm 77 which rests upon the thread-mass being wound upon the bobbin. When the bobbin is full of thread, the arm 77 is PlBhCd away from the spindle '13 sufliciently to cause the latch 74 to release the arm 72 which springs upwardly and disconnects the friction-wheel 65 from the driving disk 64.

The invention is not to be understood as limited in all of its aspects to any particular type of sewing machine mechanism or to the specific forms and relative arrangements of parts shown and described as these may obviously be variously modified and rearranged within the spirit and scope of the invention defined in the claims.

Having thus set forth the nature of the invention, what I claim herein is:-

1. A sewing machine having, in combination, a frame including a bed and a hollow gooseneck having an aperture in its top wall, stitch-forming and feeding mechanisms incorporated in said frame, and an electric motor mounted on top of said gooseneck and having a vertical power-shaft entering said aperture and operatively connected to said stitch-forming and feeding mechanism.

2. A sewing machine having, in combination, a frame including a bed and a hollow gooseneck having an aperture in its top wall, stitch-forming and feeding mechanisms incorporated in said frame, an electric motor mounted on top of said gooseneck and having a vertical power-shaft entering said aperture and operatively connected to said stitch-forming and feeding mechanisms, means for lifting the motor-shaft to disconnect it from the machine mechanism, and a bobbinwinder mounted on said motor.

3. A sewing machine having, in combination, a frame including a bed and gooseneck, a reciprocating needle, a needle-operating shaft journaled horizontally in said gooseneck, a balancewheel carried by said shaft externally of said gooseneck, loop-taking and feeding mechanisms carried by said bed, an electric motor mounted on top of said gooseneck and having a vertical power-shaft connected to drive said needle-operating shaft and said loop-taking and feeding mechanisms, manually operated means for disconnecting the motor power-shaft from the machine mechanism, a bobbin-winder drive-wheel fixed to the motor-shaft, and a bobbin-winder engageable with said drive-wheel.

4. A sewing machine having upper and lower rotary shafts, stitch-forming and feeding devices actuated by said shafts, an intermediate shaft in non-intersecting relation with said upper and lower rotary shafts, a spiral gear connection between said intermediate shaft and each of said upper and lower shafts, and an electric motor disposed above the upper rotary shaft and including a vertical power-shaft direct connected in one-to-one driving relation to the upper end of said intermediate shaft.

5. A sewing machine having upper and lower rotary shafts, stitch-forming and feeding devices actuated by said shafts, an intermediate motordriven shaft in non-intersecting relation with said upper and lower rotary shafts, a spiral gear connection between said intermediate shaft and each of said upper and lower shafts, and an electric motor disposed above the upper shaft and having a vertical power-shaft in end-to-encl alinement with and connected to said intermediate shaft.

6. A sewing machine having a frame including a bed and a hollow gooseneck rising therefrom, said gooseneck being formed in its top wall with an aperture, a motor mounted on top of said gooseneck and having a vertical power-shaft entering said aperture, upper and lower rotary shafts mounted in the machine frame in non intersecting relation with the axis of the motor power-shaft and an intermediate shaft geared to drive said upper and lower rotary shafts and connected to be driven by the motor power-shaft.

7. A sewing machine having, in combination, a frame, stitch-forming and feeding mechanisms incorporated in said frame, a. machine shaft journaled in said frame and connected to drive said stitch-forming and feeding mechanisms, a motor having a frame and a power-shaft movable endwise therein and relative thereto, and means for coupling and uncoupling the motor-shaft with and from said machine-shaft by endwise movement of said motor-shaft in the motor-frame.

8. A sewing machine having a bed and a gooseneck including an upright portion or standard and an overhanging portion or bracket-arm, upper and lower shafts journaled respectively in said bracket-arm and bed, a motor mounted on top of said gooseneck at the juncture of said standard and overhanging arm, and a motorshaft extending downwardly from said motor within said standard transversely of and in nonintersecting relation with said upper and lower shafts, and operatively connected with the latter.

9. A sewing machine having in combination, a frame including a bed and gooseneck, stitchforming and feeding mechanisms incorporated in said frame and including upper and lower parallel shafts and an intermediate vertical shaft interconnecting said upper and lower shafts, and an electric motor detachably mounted as a. unit upon said frame and including a power-shaft disposed beyond one end of and in alinement with said intermediate shaft and connected to drive the latter.

10. A sewing machine having a frame including a bed and gooseneck, lower and upper shafts journaled respectively in said bed and gooseneck, stitch-forming and feeding mechanisms actuated by said shafts, an intermediate upright shaft journaled in said gooseneck and geared to said upper and lower shafts, and a motor coaxial with and connected to said intermediate shaft, said motor being disposed above the upper shaft of the sewing machine.

HERBERT J. GOOSMAN.