US2097462A

US2097462A - Shoe sewing machine

Info

Publication number: US2097462A
Application number: US79284A
Authority: US
Inventors: Bernard T Leveque
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1935-03-12
Filing date: 1936-05-12
Publication date: 1937-11-02
Anticipated expiration: 1954-11-02

Description

Nov. 2, 1937. B. T. LEVEQUE SHOE SEWING MACHINE Original Filed March 12, 1935 5 Sheets-Sheet l 3nventor (Ittomegs Nov. 2, 1937. LEVEQUE 2,097,462

SHOE SEWING MACHINE Original Filed March 12, 1955 5 Sheets-Sheet 2 Bnnentor attorney:

Nov. 2, 1937. a. r. LEVEQUE SHOE SEWING MACHINE Original Filed March 12, 1935 5 Sheets-Sheet 3 Nov. 2, 1937. B. T. LEVEQUE SHOE SEWING MACHINE Original Filed March 12, 1935 5 Shegts-Sheet 4 f jnventor 5 Sheets-Sheet 5 attorneys B. T. LEVEQUE SHOE SEWING MACHINE inal Filed March 12, 1935 Orig Nai 2. 1937.

Patented Nov. 2, 1937 UNITE o;

PATENT oFF'IcE 10,621. 1936, Serial No. 79,284

4 Claims.

The present invention relates to shoe sewing machines, and is herein disclosed as embodied in a curved hook needle lockstitch outsole shoe sewing machine of the same construction and operation as that illustrated and described in applicants pending application for United States patent Serial No. 10,621, file-d March 12, 1935, of which the present application is a division.

The object of the invention is to provide a needle thread take-up mechanism of improved construction and operation having its various parts so constructed and arranged that the amount of thread taken up is always the same, and is not afiected by any overthrow of the mechanism when the machine is operated at high speed or when the parts become loose or worn with use.

With this object in View, the invention consists in the combination and arrangement of parts hereinafter described and defined in the claims.

Although the invention is described as embodied in the particular type of shoe sewing machine above referred to, it is not limited in its application to such machines, but is capable of embodiment in machines of other types of construction and mode of operation.

In the drawings illustrating the present invention, Figure 1 is a view in side elevation of an outsole shoe sewing machine embodying the invention; Figure 2 is a view in front elevation of the head of the machine illustrated in Figure 1; Figure 3 is a detail view in front elevation, partly in section, illustrating the needle thread take-up mechanism; Figure 4 is a detail view in left side elevation of the take-up mechanism illustrated in Figure 3; Figure 5 is a plan view of the parts illustrated in Figure 4 and Figure 6 is a detail sectional view in right side elevation of the take-up showing the connections by which it is actuated from the cam shaft of the machine.

Referring to Figures 1 and 2, the work supporting and feeding mechanism comprises the Work support 2 and presser foot 4 mounted on feed carriage 6, which is mounted for advancing and. retracting movements on fixed guides 8 and III.

The stitch forming devices include the curved hook needle 12 and curved awl l4, clamped respectively in the needle segment I6 and awl segment [8, which segments are mounted to oscillate concentrically on a stud fixed in brackets on the frame of the machine.

In addition to the needle, the thread handling devices acting on the needle thread consist of a needle threading looper 20, a thread arm 22 for drawing out a bight of thread between the looper and the work, a loop taker 24 in the form of a ro- Dividedandgthis application May 12,

tary shuttle for passing a loop of needle thread over the locking thread case 26, a loop spreader 28 to spread the loop for the loop taker 24, a thread lock, thread measurer, and the take-up mechanism hereinafter described. I

The take-up mechanism illustrated in Figures 3 to 6 is actuated in proper timed relation to the other stitch-forming and thread handling devices to give up needle thread while the needle loop is being carried over the shuttle 24 and, after the loop has been carried over the top, to pull the thread down from the shuttle and into the work to set the stitch. This take-up mechanism comprises two

arms

30 and 32 pivotally mounted one above the other to swing in substantially the same vertical plane. At their outer ends, these arms carry respectively take-up

rolls

34 and 36 over which the needle thread passes in its travel from the source of supply to the looper. In taking up the thread, the take-

up rolls

34 and 36 cooperate with

fixed guide rolls

38 and 40, these guide rolls being arranged so that the thread coming from the supply passes first around the roll 40, then over the upper take-up roll 34, then over the lower take-up roll 36, then upwardly to the guide roll 38, and from this roll to the looper.

The take-up

arms

30 and 32 are arranged to move from the position indicated in Figure 4, in which they are substantially horizontal and parallel, to the position indicated in Figure 6, in which they are substantially vertical and in line with each other. In so moving, the

arms

30 and 32 cause the take-

up rolls

34 and 36 to take up thread simultaneously in two loops and, by reason of the fact that the arms are substantially in alignment at the limit of their taking-up stroke, the amount of thread taken up is always the same, and is not affected by any overthrow of the arms.

The take-up arms are actuated from the cam shaft of the machine through connections comprising intermeshing gear segments 42 and 44' on the hubs of the

arms

30 and 32, a gear segment 46 on the hub of the lower arm 32, and a gear segment 48 meshing with the gear segment 46 and carried at the outer end of one arm of a lever 50 pivotally mounted on a supporting shaft 52. attached to a link 54 having near its rear end a notch 56. When the machine is in operation, this notch engages a pin 58 in the end of a lever 60 pivotally mounted on a supporting shaft 62 and provided with a cam follower 64 engaging a groove in cam disk 66 mounted on the cam shaft 68.

The other arm of the lever 52 is pivotally The nature and scope of the invention having thus been described, What is claimed is:

1. A lockstitch sewing machine having, in combination, with the other stitch forming devices, a take-up comprising two pivotally mounted arms, a thread take-up guide on each arm, and means for oscillating the arms through substantially equal arcs to move the guides in substantially the same plane towards and from each other.

2. A lockstitch sewing machine having, in combination with the other stitch for ing devices, a take-up comprising two pivotally mounted arms, a thread take-up guide on each arm, and means for oscillating the arms from a positionin which the arms are parallel to and from a position in which the arms are substantially in line with each other.

3. A lockstitch sewing machine having, in combination with the other stitch forming devices, a

take-up comprising two pivotally mounted arms, a thread take-up' guide on each arm, stationary guides over which the thread passes on its way to and, from the take-up guides, and means for oscillating the arms to move the guides towards each other to give up thread and away from each other to positions with relation to the stationary guides and to each other to produce the greatest possible loop'extension to take up thread.

BERNARD T. LEVEQUE.