US2073993A

US2073993A - Darning appliance

Info

Publication number: US2073993A
Application number: US91221A
Authority: US
Inventors: Macpherson Reginald George
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-07-23
Filing date: 1936-07-17
Publication date: 1937-03-16
Anticipated expiration: 1954-03-16
Also published as: GB449647A

Description

March 1 1937. R. G. MACPHERSON 2,073,993

DARNING APPLIANCE Filed July 17, 1936 Patented Mar. 16, 1937 PATENT OFFICE 2,073,993 DARNING APPLIANCE Reginald George Macpherson, Harrogate, England Application July 1'7, 1936, Serial No. 91,221 In Great Britain July 23, 1935 2 Claims.

The invention relates to appliances or apparatus for facilitating the operation of darning, and it has for its object to provide an improved device for the purpose.

Apparatus according to the invention is characterized by the combination of a carrier plate having its lower edge serrated to provide spaced recesses, and a second plate slidably supported adjacent one face of the carrier plate and also having its lower edge serrated at double the pitch or'spacing of the carrier plate, means being provided whereby, the second plate can be moved vertically a suitable distance in relation to the carrier plate and when in raised position can be moved laterally a distance equal to one pitch or spacing of the serrations of the carrier plate, so as to depress alternate warp threads previously placed across the hole to be darned, and the lower ends of the sides of the carrier plate being provided with eyes through which a removable pin can be inserted to extend horizontally across the platea short distance below the upper ends of the recesses in said plate.

In the accompanying drawing,

Figs. 1 and 2 are, respectively, a front view and an edge view of a device embodying the invention in one form;

Fig. 3 is a detail modification of the device shown in Figs. 1 and 2; and

Fig. 4 is a diagram illustrating the action of the device.

Referring to the drawing, a represents the carrier plate which is made of suitable dimensions and has its lower edge serrated to provide 35 recesses a. of appropriate depth and of a width and spacing to suit the material or yarn for which the device is designed.

,Inwardly-turned lugs a on the carrier plate a hold slidably adjacent its front face a second 40 plate I) the lower edge of which is serrated as at b similarly to the lower edge of the carrier plate but at double the pitch or spacing of the latter.

The width of the lower part of the plate I), in relation to the width of the carrier plate, is

5 such that the said plate I) can be moved laterally a distance equal to one pitch or spacing of the serrations a of the carrier plate.

Slots b in the upper part of the plate b receive projections c on a plate 0, the rear edge 50 of which rests in the apex of a V-shaped rearward recess a of the plate a. A spring d, which may conveniently be in the form of a rubber band and be anchored about the part (1 acts upon the plate 0, and tends to hold it in 55 u h a position that the projections 0' hold the plate I) in raised position, defined by means of a pin 2 on the carrier plate which projects into a slot 11 in the plate 22 and, when I the said plate is in raised position, bears against the bottom of the slot as shown in Fig. 1. When the plate I) is depressed the pin bears against the upper edge of the slot b and assists in determining the permissible downward movement of the plate b.

The edges of the plate a are formed with 10 lugs a which cooperate with recesses or slots b on the plate I) to guide the upper end of the said plate as it is moved vertically, and also assist in limiting the permissible downward movement of the plate I). 15

The lower ends of the edges of the plate a. are fashioned with lugs a having openings through which may be passed a removable pin 1, the disposition of the lugs being such that the pin extends horizontally across the plate a short 20 distance below the upper ends of the recesses a. In Figs. 1 and 2-the pin is shown as being located on the rear side of the plate a. It will, however, preferably be located on the front side, as indicated in Fig. 3, for a reason which will be referred to later.

The extremities of the projections which form the spaced recesses b in the lower edge of the plate 11 are preferably bent frontwardly as at 12 In using the device, the hole to be darned is first covered in the usual way by a series of parallel, suitably-spaced stretches of yarn g which, for convenience of reference, may be termed warp threads.

The projections on the lower end of the carrier plate a are now passed down between the warp threads g so that one of such threads lies in each gap or recess a. between two adjacent projections. The pin f is then inserted beneath the warp threads. If the plate a is now depressed, its projections will depress those warp threads which are positioned beneath them, that is to say every other warp thread will be depressed. A weft yarn h is then passed by means of a needle i through the shed or gap 7 formed between the upper and lower warp threads. When the needle has been passed throughthe shed it is moved sideways to carry the inserted weft up to the fell of the darn parallel to the last inserted weft. The weft is then darned into the edge of the opening by means of the needle. The slidable plate I) is then released, to be raised by its spring d, and this permits the depressed warp threads to rise.

The plate b is then moved laterally through the permissible distance of one pitch or spacing of the recesses a and is depressed again, when it presses down the warp threads which at the previous operation were left raised. Another length of weft is inserted, and so on until the opening to be darned has been covered. Withdrawal of the pin g then leaves the carrier plate and with it the plate b, free to be lifted away from the fabric.

If the pin 1 is located in front of the plate a as in Fig. 3 instead of behind it as in Figs. 1 and 2, the rear side of the plate can reach right up to the end of the hole to be darned and a more complete darn be effected.

The frontwardly bent lower ends b of the projections on the lower end of the plate b form a horizontal guide way to facilitate passage of the weft needle through the shed formed by the depression of the plate 11.

The upper end of the plate b is preferably provided with side lugs such as b, and a top flange b so that it can conveniently be moved laterally and depressed by the thumb and fingers of one hand, leaving the other hand free for the manipulation of the weft needle. The ends of the recess a are preferably closed in to facilitate gripping of the device.

It will be understood that the details of construction and arrangement of the device, so far as concern more particularly the raising and lowering of the plate b and its lateral movements may be varied from the particular embodiment I have illustrated and described, this being only given by way of example.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A daming appliance comprising in combination two plates such as a and b each having its lower edge serrated and the plate b having its serrations double the pitch or spacing of those of the plate a, and means whereby the plate b can be moved laterally in relation to the plate a through a distance equal to one pitch or spacing of the serrations of the said plate a and depressed against the action of a spring to press down alternate ones of warp threads passed through the recesses of the plate a, substantially as set forth.

2. An appliance according to claim 1 further characterized by the provision of a removable pin such as f, adapted to be positioned on the plate a, a. short distance below the upper ends of the recesses in the lower edge of the said plate.

REGINALD G. MACPHERSON.