US1030741A

US1030741A - Welt-guide.

Info

Publication number: US1030741A
Application number: US47070409A
Authority: US
Inventors: John T Mcisaac
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1909-01-04
Filing date: 1909-01-04
Publication date: 1912-06-25
Anticipated expiration: 1929-06-25

Description

J. T. MoISAAG.

WELT GUIDE.

APPLICATION FILED JANA, 1909.

1,030,741 Patented June 25, 1912.

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COLUMBIA PLANOGRAPN :0, WASHINGTON, D. E).

lUlTE tl SAS JOHN T. IVICISAAC, OF EAST WEYMOU TH, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WELT-GUIDE.

Specification of Letters Patent.

Patented June 25, 1912.

To all whom it may concern:

Be it known that I, JOHN T. MoIsAAo, a citizen of the United States, residing at East lVeymouth, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Welt- Gruides; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to welt guides for shoe sewing machines of that class which comprise a curved hook needle and which are used in the manufacture of shoes to secure together the welt, upper and insole. An example of one type of this class of machines is illustrated in the patent to French 8; MeyenNo. 112,704.

In shoe sewing machines of the class above referred to the welt is guided and held in the proper position with relation to the needle by means of a guide provided with a welt guiding opening through which the welt passes. This guide is moved intermittently toward and from the shoe so as to present the welt in proper position for the needle to enter the groove in the welt and so as to be out of engagement with the shoe while the shoe is fed. To cause the welt to be held in the proper position with relation to the needle so that the needle will pass through the groove in the welt it is customary to adjust the parts of the welt guideso that the welt guiding opening closely fits the welt. As a result, the welt guide offers more or less resistance to the passage of the welt therethrough during the retractingmovement of the welt guide and during the feeding of the shoe so that the welt is often stretched to an objectionable extent and more or less difliculty is experienced by the operator in manipulating the shoe, particularly while sewing around the toes of narroW-toed shoes.

The object of the present invention is to produce a welt guide for use in curved hook needle shoe sewing machines which will accurately hold the welt in the proper position with relation to the needle and which will also allow the welt to pass freely through the welt guiding opening of the guide while the guide is withdrawn from the shoe or while the shoe is being fed by the feeding devices of the machine or is being manipulated by the operator.

With this object in view the invention contemplates the provision of a welt guide having members arranged to form a welt guid ing opening and mounted so as to be capable of movement with relation to each other during the sewing operation to contract and expand the welt guidin opening. By mounting the members of the welt guide which form the welt guiding opening, so as to be capable of moving with relation to each other, the welt guiding opening can be contracted so as to accurately hold the welt in proper position with relation to the needle while the needle is passing therethrough, and can be expanded while the welt guide is withdrawn from the shoe and during the feeding of the shoe to permit the welt to pass freely therethrough. By the use of this guide the welt can be sewed tightly and accurately to the upper and insole of a shoe without exerting any objectionable stretching or retarding action 011 the welt tending to impair the quality of the work or to interfere with the feeding of the shoe or its manipulation by the operator. Another advantage of this guide is that the leading end of the welt can be attached to the shoe without being held against the shoe by the operator ahead of the point of operation of the needle. \Vith welt guides as heretofore constructed, a separate welt holding device is required to hold the end of the welt, or the welt must be pulled through the guide by the operator and the seam started at some distance from the end of the welt. The length of welt pulled through the guide by the operator is subsequently out off in the manufacture of the shoe so that considerable waste of the welt results. of shoes this waste often amounts to several inches. By arranging the members of the welt guide so as to be capable of moving to expand the welt guiding opening, the welt can be permitted to pass so freely through the guide that the strands-of thread drawn through the work at the first retracting stroke of the needle are sufficient to hold the end of the welt on the shoe and permit the welt to be fed forward with the shoe. The seam can thus be started close to the end of In a single pair the welt so that there is no waste, and aS good or better results can be secured as by the use of a separate welt holding device to hold the end of the welt while the first stitches are being taken.

The above and other advantages secured by the use of the present invention will i be apparent to those skilled in the art from the following description of the welt guide embodying the preferred form of the in vention.

Referring to the drawings accompanying this application, Figure 1 is a top plan view of a welt guide embodying the present in vention in its preferred form. Fig. 2 is a bottom plan view of the welt guide illust-rated in Fig. 1. Fig. 3 is a view in side elevation of the guide. Fig. 4 is a cross sectional view taken on the line 4-t, Fig. 1, illustrating the relative position of the parts when the welt guiding opening is expanded. Fig. 5 is a view similar to Fig. 4 illustrating the relative position of the parts when the welt guiding openin is contracted and Fig. 6 is a view in rear e evation of the guide.

The welt guide of a curved hook needle shoe sewing machine, as usually constructed, comprises a metallic block, commonly known as the frame, and a thin sheet metal plate, commonly known as the shield, secured to the frame and arranged to form with the,

frame a guiding opening for the welt. The shield is secured beneath the frame and the welt engaging surfaces of the shield and frame are curved so as to give the desired transverse curvature to the welt. An abutment or shoulder on the forward end of the frame forms a guide for the inner edge of the welt, while an adjustable finger, commonly known as the spring or gage, forms a guide for theouter edge of the welt. This welt guide is simple in construction, comprises a small number of parts and is strong and durable. For these reasons the present invention in its preferred form is embodied in a welt guide having the same general construction and arrangement of parts. It is to be understood, however, that the invention might be otherwise embodied and that except as defined in the claims the invention is not limited to any specific construction and arrangementof the parts forming the guide.

In the guide illustrated in the drawing the frame is indicated at 1, and the shield at 2. The frame is adapted to be secured in the usual manner to the welt guide slide 3 of a curved hook needle shoe sewing machine such for instance as is disclosed in the patent to French & Meyer, hereinbefor referred to. The lower welt engaging surface 4; of the frame is curved so as to give the desired transverse curvature to the welt. At the end of the frame is a shoulder or abutment- 5 to engage the inner edge of the welt, and

adjustably secured to the frame by a clamping screw 6 is a gage 7 to engage the outer edge of the welt.

In the illustrated embodiment of the invention a relative movement is provided for between the shield and the frame to permit a contraction and. expansion of the welt guiding opening between the shield and the frame during the sewing operation. To this endthe shield is pivotally mounted at its rear end upon the frame and at its forward end is connected to the frame so as to permit a limited swinging movement of the shield on its pivot toward and from the welt supporting surface of the frame. The pivot of the shield is indicated at S and consists of a pin mounted in the frame and passing through an upturned flange of the shield, which flange is received in a slot cut in the frame. The connection between the forward end of the shield and the frame consists of a pin 9 passing through the slotin the upturned front portion of the shield.

The operation of the welt guide illustrated in the drawing and above described will be apparent from an inspection of the drawing and particularly of Figs. l and 5. When the welt guide is pressed toward the shoe, the shield 2 engages the shoe and'is forced toward the welt supporting surface 4 of the frame so that the welt is securely held in the welt guiding opening with its inner edge against the abutment 5. parts of the welt guide in the relative positions indicated in Fig. 5 the welt will be securely held against the shoe with the groove in the path of movement of the needle and the welt will be held in this position until the needle has pierced the work and has been withdrawn therefrom. During the withdrawing movement of the needle any displacement of the welt will be prevented by reason of its engagement with the shield 2 and surface 4 of the frame, so that there will be no liability of loosening the preceding stitch by pulling the welt away from the shoe during the retracting movement of the needle. As soon as the welt guide is withdrawn from the shoe, however, the shield 2 will drop to the position indicated in Fig. 4, thereby expanding the'welt guiding opening and permitting the welt to pass freely therethrough during the continued backward movement of the guide and the feeding of the shoe.

The nature and scope of the present in vention having been indicated and a preferred form of the invention having been specifically described, what is claimedisz- 1. A welt guide for curved hook needle shoe sewing machines, having, in combination, members arranged to form a welt guiding opening curved transversely to the lead of the welt and mounted for movement with relation to each other during the sewing With the operation to contract the welt guiding opening and hold the welt in proper position with relation to the needle and to expand the welt guiding opening and permit the welt to pass freely therethrough during the feeding of the shoe.

2. A welt guide for curved hook needle shoe sewing machines, having, in combination, a frame consisting of a metal block and a shield consisting of a thin sheet metal plate having a welt guiding opening between them curved transversely to the lead of the welt, said frame and shield being mounted for relative movement to contract and expand said opening during the sewing operation.

A welt guide for curved hook needle shoe sewing machines, having, in combination, a frame consisting of a metal block having a welt guiding surface curved transversely to the lead of the welt and a shield consisting of a thin sheet metal plate correspondingly curved and mounted thereon to move toward and from the welt guiding surface of theframe during the sewing'operation to contract and expand the welt guiding opening.

4. A welt guide for curved hook needle shoe sewing machines, having, in combination, a f time having a welt guiding surface curved transversely to the lead of the welt, a shield correspondingly curved, a pivotal connection between the rear end of the shield and the frame and a connection between the front end of the shield and the frame permitting movement of the shield toward and from the welt guiding surface during the sewing operation. In testimony whereof I atliX my signature,

in presence of two witnesses.

JOHN T. MOISAAC. Witnesses WARREN G. OGDEN, FRED O. FISH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.