US826378A - Curtain-stretcher. - Google Patents

Description

No. 826,378. PATENTED JULY 17, 1906.

H. E. SOUT ORTH. CURTAIN BTGHER. APPLICATION FILED JULYBI 1 E NORRIS PETERS CO WASHINGTON D f Alfamey UNITED STATES PATENT OFFICE.

HENRY E. SOUTHWORTH, OF COLOHESTER, VERMONT, ASSIGNOR TO PORTER SCREEN MANUFACTURING COMPANY, OF BURLINGTON,

VERMONT.

CU RTAIN-STRETCHER.

Specification of Letters Patent.

Patented July 17, 1906.

Application filed July 31,1905. Serial No. 272,139.

To all whom, it may concern:

Be it known that I, HENRY E. SOUTH- wonrn, of Golchester, in the county of Chittenden and State of Vermont, have invented a new and useful Improvement in Curtain- Stretchers, of which tne following is a specifi cation.

My invention has to do with the bars of a curtain-stretcher frame and the fabric-hold ing pins mounted therein, the object being to produce a cheap, efficient, and convenientlyarranged construction wherein the pins will be held securely in place and be supported against strain, while at the same time they may be readily manipulated and adjusted longitudinally of the bar in which they are mounted.

Under my invention the curtain-stretcher bar has in and lengthwise of its body a slot substantially A sha ed in cross section formed by two slots which enter the bar from one of its faces (preferably its upper face) and diverge from each other as they pass from the entering-point into the body of the bar, and the fabric-holding pins are provided with bases of corresponding cross-section to enter and fit in said slot, through the open apex of which the shanks of the pins protrude.

The invention will first be described in connection with the drawings accompanying and forming part of this specification and will then be more particularly pointed out in the claims.

In said drawings, Figure 1 is an end elevation of a side bar of a curtain-stretcher frame embodying my invention in its preferred form. Fig. 2 is a cross-section of a bar hav ing a modified form of retaining-slot. Fig. 3 is a perspective view of the preferred form of pin.

The barA (made of any approved material) has that portion of its upper face adjoining the inner edge beveled, as at a, this beveled or inclined face forming a surface on which the shanks b of the pins b may rest. In rear of this beveled face a are two longitudinal slots which enter the bar from the upper face thereof at an angle to each other and diverge from one another as they pass down from the entering-point into the body of the bar, thus forming, in effect, a continuous slot 0 of substantially A shape in cross-section, the acutencss of the apex of the slot being determined,

of course, by the angle at whichthe slots enter the bar relatively to one another and to the distance which may separate them at the enteringpoint.

The pins 1) have bases of corresponding A form in cross-section to fit and move lengthwise in the A-slot c, the shanks of the pins projecting through the open apex of the slot and extending upon the inclined face a of the bar. It is this combination of a A-slotted curtain-stretcher bar with pins having correspondingly A-shaped bases to fit and move lengthwise of the A- slot in the bar that mainly characterizes my invention. The pins are thereby held at all times most securely in place. They can be adjusted lengthwise of the bar with great facility, while at the same time whenever the strain on the attached curtain comes upon them they are thereby clamped, as it were, in place and practically locked against misplacement or accidental lengthwise movement. The only difference between the structures in Figs. 1 and 2 is that in the former the slot is less acute angled than it is in the latter. Manifestly this angle may vary without departure from the invention.

The form of pin which I prefer to employ is illustrated in Fig. 3. It is made of wire in one continuous piece and is what may be called a double pinthat is to say, each end of the Wire is bent to form a in I) and that portion of the wire between t e shanks b of these two pins is bent to form a A shaped base a adapted to fit and slide in the A-slot c in the bar.

Having described my invention and the best way now known to me of carrying the same into practical effect, I state in conclusion that I do not limit myself strictly to the structural details hereinbefore set forth in illustration of the invention, for manifestly the same can be varied to some extent without departure from the spirit of the invention; but

What I claim herein as new, and desire to secure by Letters Patent, is-

1. A curtain-stretcher bar having in and lengthwise of it a slot of substantially A cross-section with its apex opening on one of the faces of the bar, substantially as and for the purposes hereinbefore set forth.

2. A curtain-stretcher bar having that portion of its upper face which adjoins its inner edge beveled, and also having formed in and lengthwise of it a slot of A shape in crosssection the open apeX of which is along the rear edge of the beveled portion of the bar, substantially as and for the purposes herein before set forth.

3. A pin for curtain-stretcher bars consisting of a pin proper and a sup orting-base of A shape in cross-section to W iich the shank of the pin is secured, substantially as and for the purposes hereinbefore set forth.

4. A curtain-stretcher bar having in and lengthwise of its body a slot of substantially A shape in cross-section, formed by two slots which enter the bar from one of its faces and diverge from each other as they pass from the entering-point into the body of the bar,

and retaining-pins having bases of corresponding shape in cross-section to enter and fit in said A-slot, substantially as and for the purposes hereinbefore set forth.

5. A double pin formed of a single piece of wire having its opposite ends bent each to form a pin b and pin-shank, and that portion of it intervening between the pin-shanks bent to form a base A-shaped in cross-secti0n, substantially as hereinbefore set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY E. SOUTHWORTH.

/Vitnesses:

WLI. JoNEs, J. O. PICI-IE.

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