US1879449A

US1879449A - Sewing machine

Info

Publication number: US1879449A
Application number: US507075A
Authority: US
Inventors: Josef F Palme
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1931-01-07
Filing date: 1931-01-07
Publication date: 1932-09-27
Anticipated expiration: 1949-09-27

Description

Sept. 27, 1932-. F, PALME 1,879,449

SEWING MACHINE Filed Jan. 7, 1931 3 Sheets-Sheet l Josef i. Palme Sept. 27, 1932. J PALME 1,879,449

SEWING MACHINE Filed Jan. 7, 1951 5 Sheets-Sheet 2 Witwe o= Sept. 27, 1932.

J. F. PALME SEWING MACHINE Filed Jan. '7. 1931 5 Sheets-Sheet 3' Wi Wew gwuanio'o Josef 1 Palme 4 Patented Sept. 27, 1932 UNITED STATE-S PATENT: oFFIcE IosEE F. PALME, F ELIZABETH, NEW .IERsEY, AssIGNoR To HE SINGER MANUEAc- TURING COMPANY, OF ELIZABETH, 'NEw'JERsEY, A coRPoRATIo on NEW JERSEY .SEWING MACHINE Application filed January 7,' 1931. Serial No. 507,075.

This invention relates to sewing machines, more particularly of the type having. laterally vibrating needle and loop-taking devices adapted for the formation of zigzag stitches, and has for an object to reduce the number of working parts and otherwise simplify and improve the needle-bar and looptaker vibrating mechanism of the machine disclosed in the patent to A. Grieb, No. 1,197,735, of Sept. 12, 1916, while maintaining ample room under thegooseneck of the machine for the accommodation and passage of the work. v

The invention comprises the devices, combinations and arrangements of parts hereinafter more particularly described and pointed out in the claims. I A

The features of the invention and'the ad? vantages attained thereby will be readily r. understood by those skilled inthe art from,

the following detailed description of a pre-j ferred embodiment of the invention illutrated in the accompanying drawings in which Fig. 1 is a side elevation of a sew ng machine embodying the invention. Fig, 2

is a horizontal section through the gooseneck of the machine,showing the bed and bed-' mechanism in plan. Fig. 3 is a section substantially on the line 3-3, Fig. 1. Fig. 4 is an end elevation of the machine looking from the left of Fig. 1 and Fig. 5 is a section on the line 5--5, Fig. 1. V v

The machine is formed witha frame having a bed 1 and an overhanging gooseneck 2 including the upright member or standard 3 and overhanging arm 4 terminating in the head 5.

Pivotally mounted on the. stud 6 fixed to the head 5 is the vibratory needle-bar-carrier 7 having upper and lower bearings, 8 and 9, respectively, for the reciprocating needle bar 10 carrying the needle 11. p

The needle-bar is reciprocated by means of the usual link-connection 12 with the ricedle-bar actuating lever 13 fulorumedat 14 on the gooseneck 2 and connected at itsrear end to the pitman 15 which is actuatedby the eccentric 16 on the main-shaft 17 journaled in the bed 1; the constructive features 50 so far described being substantially inaccordance with the disclosure, of the Grieb patent previously referred to.

The feeding mechanism of the machine includes the usual four-motion feed-dog 18 whichcooperates with the usual presser-foot 19 and is actuated by any suitablemechanism, preferably that disclosed in the Grieb patent referred to.

Cooperating with the needle 11 is the looptaker 20, preferably in the form of the well known rotary chain-stitch-looper having the usual loop-seizing beak 21 and loop-spreading wing 22. The looper is secured to the -.looper-shaft. 23 which is journaled in the looper-carrier or sleeve 24 slidably mounted in the bearing-bushing 25 in the bed 1. The

. sleeve 24 is formed at one end with a blockshaped head 26 to which is secured by the screw 27 one end of the needle-throat member 28 slidably mountedin the fixed guide way 29 and formed at its free end with a needle-aperture 30. The connection of the sleeve 24 with the needle-throat member 28 through the sleeve-head 26 fixes the sleeve 24 against rotation in the bushing 25 and maintains the aperture 30 and the looper 20 in fixed operative relation to one another. Fixed to the end of the looper-shaft 23, remote from the looper 20, is the coupling collar 31 formed with the diametrical slot 32 which is entered by the flat tongue 33 formed on the end of the main-shaft 17. The tongueand-slot: connection between the looper-shaft 23, and the main-shaft 17 transmits rotary .motion from the main-shaft to the looper 20 while permitting the looper and

throatplate assembly

24, 26,28 to be vibrated or reciprocated laterally of the line of feed.

Rigidly secured to the needle-bar-carrier 7 by screws 35 is one end of the arm 36 which is gooseneck shaped and roughly parallels the frame-gooseneck 2, i. e., the arm 36 has an upper laterally extending portion 36 and a downwardly extending portion 36" the arm 36, as a whole, being bowed away from the line of feed so as to provide space under the arms 2 and 36 for the accommodation and passage of thework. The downwardly extending portion 36" of the arm 36 may be slidably received in the slot 37 of-the bracket 38 fixed to the bed 1 so as to be steadied by such bracket. The arm 36 has connected to it, by means of the screw 39 adjacent its lower end and below the level of the pivotstud 6, one end of a link 40, the other end of which is connected by the screw 41 to the arm 42 fixed by means of the screws 43 to the headblock 26 of the sleeve 24. The link connects the needle-barand looper-carriers together and causes them to move in unison laterally of the line of feed.

To actuate the connected needle-barand looper-carriers 7 and 24, there is connected to the arm 36 by the screw 44 below the level of the pivot-stud 6, one end of the link 45, the opposite end of which is adj ustably connected to the slotted arm 46 of a rock-lever fulcrumed'at 47 on the frame of the machine and having a downwardly extending arm 48 which carries a roller 49 entering the camslot 50 in the barrel-cam 51 which is journaled to rotate on the stationary shaft 52 fixed to the bed-lug 53. The barrel-cam 51 has a gear-toothed portion 54 which meshes with the pinion 55 fixed to the main-shaft 17. The ratio of gearing between the pinion 55 and the gear 54 isas one is to two; the cam 51 rotating at one-half the speed of the mainshaft 17. The cam 50 is so shaped as to vibrate the needle and looper laterally of the line of feed and hold them in their extreme positions while the needle is penetrating the work and presenting its loop to the/looptaker; the lateral shift being efl'ected while the needle is out of the work. The throw or extent of lateral vibration of theneedle and looper may be varied by adjustingthe upper end of the link 45 along the slot in the arm 46; The slot in the armt46 is curved-in the arc of a circle about the screw 4421s a center when the needle and'looper are intheir mid-' position, in which position the needle-bar is vertical. By adjusting the link 45 into alinement with the

centers

44 and 47, the lateral vibratory movementsof the needle and looper may be practically eliminated, in which position of adjustment the machine may be used for straight-away sewing.

It will be seen in Fig. 1 that the pivot-point 39 for the link 40, being below the pivotstud 6 has both a vertical and a horizontal component of motion, the latter of which is transmitted by the link 40 to the looper-carrier'24which is moved simultaneously with and in the same direction laterally of the line of feed as the needle 11. 7

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

I 1. In a sewing machine, in combination,

feeding mechanism, a pivotally mounted needle-bar-carrier, a looper-carrier movable laterally of the line of feed, an arm rigidly secured at one end to said needle-bar-carrier and connected at its other endto said-loopercarrier, said arm being bowed between its ends away from the line of feed, and means for vibrating said arm, said other end of said arm being below the level of the pivot-point of the needle-'bar carrier.

3. In a sewing machine, in combination, feeding mechanism, a pivotally mounted needle-bar-carrier, a looper-carrier movable laterally of the line of feed, an arm rigidly secured at one end to said needle-bar carrier, a link'connected between the other end of said arm and'said looper-carrier, said arm being bowed between its ends away from the line of feed, and means for vibrating said arm.

4. In a sewing machine, in combination, feeding mechanism, a pivotally mounted needle-bar-carrier, a looper-carrier movable laterally of the line of feed, an arm rigidly secured at one end to said needle-bar-carrier and connected at its other end to said loopercarrier, said arm 'being bowed between its ends away from the line of feed, and means for vibrating said arm, saidother end of said arm being below the level of the pivot-point of the needle-bar-carrier, said means including a rocking member and a link connected at one end to said rocking member and at its other end to said arm, said link having its point of connection with said arm below the level of the pivot-point-jof said needle-barcarrier.

5. A sewing machine having a frame formed with a gooseneck, a vibratory needlefeed, a reciprocating needle-bar in said carrier, a needle carried by said needle-bar, a loop-taker cooperating with said needle and mounted in said bed for movement laterally of the line of feed, an arm rigidly secured at one end tosaid needle-bar-carrier and having its free end terminating below said gooseneck and adjacent said bed, said arm being bowed in the same direction as the bend of said