US73927A - Improved metallic baud foe teimmiig dab-seats - Google Patents

Description

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Letters .Patent No. 73,927, dated January 28, 1868.

IMPROVE!) METALLIC BAND POB. TRIMMING (.lAE--SILATSI 'ilg Sagitta aterra it in ligar Wetters hneln ma mating rari ai tigel azure.

,TO ALL WHOM IT MAY CON CERN:

Beit known that I, D. F. RANDALL, of Chicopee, in the county of Hampden, and Commonwealth of Massachusetts, `have invented a new and improved Metallic Band for Trimming the Edges of the Backs of Car-Seats, and other like upholstering purposes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon, in whichi Figure is a reverse plan of said band.

Figure 2 is a transverse section of the same.

Figure 3 is an end elevation of the set of drawing-rolls by means of which I construct the band of the form shown. i

Figure 4 is a transverse vertical section through line K L, g. 3; and

Figure 5 is a transverse section of the bar of cast metal, which is drawn through the space between the dies upon the faces of the two rolls.

To obviate the objections to the use of wooden bands or strips upon the ledges of the backs of carseats, and concealing the ends of the plush or cloth covering, metallic bands have been used; and my invention relates to the construction Iof said bauds, of such a conformation that the lower edges of the band will be embedded tightly in the cloth covering of the back, and any slight inequalities in the line of the lower edge of the band will not be visible, or leave a space between the band and the cloth.

In order to make these bands perfect in outline throughout their length as to the curves and angles, and

' to obtain a smooth, polished surface, free from seams and imperfections, and at the same time to reduce the cost of manufacturing said bands, so as to make them an available substitute for the bandsheretofore used, I construct said bands by drawing a bar of the proper material between adjustable rolls or dies, which are constructed and arranged as hereinafter described, instead of shaping them by hand, as has heretofore been done.

The process of constructing said bands is as follows: The bars of metal which I use are composed of 4tin and antimony, with a small proportion of copper, if the tin is of unusual softness, and are cast in pieces of about one-half the'length required for the finished band, and of a transverse section shown in fig. 5. .Any metallic composition possessing the requisite ductility and softness may be `used as a material for the bands, but the component parts named form a durable band, which is .capable of receiving a line surface-polish during the process of manufacture, and retaining the same in subsequent use.

The standards H I-I support the journals F F G G of the two drawing-rolls, the upper one of which has a vertical movement iu the sliding bearings N, which is controlled by the pressure-screws I I, the general arrangement being the same as in ordinary drawing-rolls. The male die D is formed upon the lower roll, and the outer edge has the outline formed by the oblique linesff, connected by the curved line e, fig; 4 The female die is formed on the surface of the upper roll, and a section of its outline, z d 7L, corresponds in form and dimension with the outline of the upper side of the completed band,lg. 2.

' To make the outer edges of the band perfect, and prevent any projection of the metal at the sides of the dies, the depth of the femalevdie is increased, to allow the die D to enter it so far thatthe vertical sides ofthe two dies come iu close contact, thus retaining the metal between the dies and shearing off any roughnessuf the edges, leaving them sharp and well defined.

The screws III being turned suiiciently to allow the bar of metal, iig. 5, to enter between the dies, the bar is` repeatedly drawn through between the revolving dies, the upper roll being gradually depressed by the screws as the drawing, progresses. Under the pressure of the rolls, the length und density of the bar are continually increased, until its shape corresponds, in -transverse section, to the space between the male and female dies when the faces of the two rolls are brought in contact. The surfaces of the two dies are highly polished, and the nature of the composition of metalsemployed is such that a smooth and glittering surface is produced upon the band. The width of the bar, as east, is little, if any, less than the width of the completed baud, to insure 'filling the spaces between f and L with metal, and to secure a. perfect edge upon the projections a and a. Holes for fastening screws are Vthen formed in the -band through the plane surface c, and the 'band is ready for use, and can be bent to conform to the curved outline of the backs of car-seats, and other like upholstering purposes? A band having the projections a a upon its lower edges could not be formed by hand-labor from a cast bar of metal as perfectly as the same can be formed by the process of drawing, as described, and the cost of construction would be so great as to prevent the introduction and use of the hanl-made bandas anvarticle of manufacture. i I I When the bands are' fastened in place, the projections a a', at the. lower. edges of the band, will sink into the plush, velvet, or other cloth' with which the seatis covered, and the band, so formed as described, will possess the following advantages over a band having a plane lower surface: The line of contact of the band and the cloth will be concealed, and anyI inequalities in the 'meetingsur-faces of either will be less plainly seen, if visibleat all; the hand will have a firmer bearing, and be less likely to be displaced or bent up from its seat; the space which is usually seen between the bottoml of the common band and the edge of the seat will be closed, thus avoiding the collection of dust which gathers in the crevice at that point, and is thence scattered out over the seat by the motion of the cars; and thecloth is held irmly anduniformly in place along the whole length of the band, instead of being held only at the points of nailing, as in the common band.A

The shape of the lower edge of the projections a a may be varied, according to the nature of the cloth covering-to which vit is to be applied, being angular, curved, or atte'ned at the point of contact with the cloth.

What I claim as my invention, and desire to secure by Letters Patent, is A A metallic band, having the projections a afformed thereon, snbstantially as and for the purposelset forth.

Witness my hand, this 11th-day of September, A. D. 1867.

, i D. F. RANDALL.

Witnesses: y

JAPHnr GHAPIN, J. l. BUCKLAND.

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