US72008A - John flinn - Google Patents

Description

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JOHN FLINN, OFPHlLA-DELPHIA, PENNSYLVANIA, SSIGNO'R TO'AROHER- A S'IEEL, )F THE SAME PLACE.

Letters Patent No. 72,008, dated December 10, 1867.

IMPROVED SELF-FAS-IENING SPRING FOB. WBBBING.

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T0 ALL WHOM IT MAY CONCEEN:

Be it known that I, JOHN FLINN, of the cityof Philadelphia., in the State of Pennsylvania, have invented a new and improved Self-Fastening Spring for Application to Webbing; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a sectional plane view, and

Figure 2 a sectional elevation of the said improved spring, and

Figure 3 a plane view of the under side of the webbing, having one of the said springs applied thereto-7 Likeletters of reference indicating the same parts when in the different figures. i

The spiral wire springs hitherto used in making the spring-seats or bottoms of chairs, sofas, &c., require to be sewed fast to the webbing, and, consequently, are very liable to wear loose, become detached, and slipped out v of place, in ashort time, by use.

The object of my invention is to obviate this result, by making the springs scltlfastening, o r capable of holding themselves properly and durably in position when applied to the webbing.

It consists in so bending one end of the spiral coil oi' wire, in making the spring, that a spring-clamp will be formed thcreat, which will hold the spring permanently in place, after it has been applied, by slipping it over the webbing, substantially as hereinafter described.

In the drawings, A A are the spring coils, and B C D E the clamping-coils. AThe wire from the clamping? coil B is extended outward therefrom, in a largerr curve', C,'toyabout'an inch, more or less, and then, by a short turn at D, backward to the opposite side, andalittle -above'the said coil B, thence aroundthe same, by a cons. centric curve, to the first-mentioned side, and, finally, outward therefrom tangentially to about an inch, more or less, where it is cut o, as shown by E, in iigs. 1 and 3. The circulnr part, C, of D and E, after the spring has been thus formed, remains sprung partly over and in contact with the upper side of the coil B, producing together the said spring-clamp. i

The spring thus constructed is applied to the webbing F (see tig. 3) by slipping the opening left between the coil C and the next coil above it, solas to bring the one edge of the said webbing F between them, and then rotating the whole spring around, in the direction of the arrows, until the parts GD E are brought into the position shown in g. 3, on the underside of the stretched webbing of the seat, and consequently the circular coil B into the relative position on the opposite side of the webbing, as indicated by the dotted lines in the same figure, thus elainpingthe webbing between them so as -to keep the spring securelylantl permanently in place. The distance of the short bend D from the circular coil B is intended to be made more or less,as the width of the particular webbing used may require, in' order that the centre of thc coil B will come to the middle of the webbing to which it is to be applied, as shown in lig. 3. v

It will be seen that this selflfastening spring will permanently hold itself in place on the webbing without thc aid of' any sewing whatever for the purpose, and, moreover, that it .can be applied with much greater facility than the old spring.

What I claim as my invention, and desire to secure by Letters Patent, is confined to the following, viz: 'l claim a spiral spring, icr webbing, having the wire at one end of the spiral coils A-A bent in the manner described and shown by B C D E, for the purpose specified.

JOHN FLINN.

Witnesses:

Bent. Monrsou, WM.4 H. Monson,

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