US1525079A - Adjustable index - Google Patents

Description

Feb. 1925 1,525,079 .1. c. LIGGETT v ADJUSTABLE INDEX Filed Oct. 1922 os,Adol

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Patented Feb. 3, 1925.

I UNITED STATES v 1,525,079 PATENT, OFFICE.

JOHN C. LIGGETT, OF NEW YORK, N. Y., A SSIGNORLTO POSTINDEX COMPANY, INC., OF

BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ADJUSTABLE INDEX.

Application filed October 21, 1922. Serial No. 596,156.

To all whom it may concern:

Be it known that I, JOHN-C. LIGGETT, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented an Improvement in Adjustable Indexes, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention aims to provide a novel and improved adjustable index of the class in which paper index slips are disposed edge to edge in guides in which they are slidable transversely of the slips.

The invention will be best understood by reference to the following description, when taken in connection with the accompanying drawings of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a front elevation of a portion of an adjustable index exemplifying the invention;

Fig. 2 is a sectional view on an enlarged scale on line 2-2 of Fig. 1;

Fig. 3 is a sectional view on an enlarged scale on line 3-3 of Fig. 1;

Fig. 4 is a perspective view of a single index slip as it appears before being placed in the guides; and

Fig. 5 is a similar perspective view of a double index slip.

Referring to the drawings, and to the em- .bodiment of the invention which is illustrated for purposes of exemplification, thcreis shown a series of index slips 6, which may be single as shown in Fig. 4, or multiple as shown, for example,- in Fig. 5.

The index slips are held in a frame, herein comprising .a plate or panel 7, having two opposite marginal portions, which are bent to form inwardly directed flanges S,

beneath orin back of which are channels 9 to receive the ends of the index slips, as shown in Fig. 3.

Heretofore in the use of indexes of this class, it has always been a problem to prevent the index slips from riding over one another, instead of always remaining with certainty edge to edge. Various expedients have been employed to overcome this dilficulty, but even they are open to more or less objection, as for example the use of celluloid tubes into which the index slips are introduced. All of these difficulties are obviated by the provision of the index slip herein shown, which has a transversely curved cross-sectional formation, as clearly shown in Fig. 2; that 'is to say, the strip as viewed in cross-section is concavo-convex. Initially, the height of the are (as shown in dotted lines in Fig. 2) is somewhat greater than the height of the are after the slipflhas been introduced into the channel: that is to say, when the slip is in place, it constitutes a spring which is held under stress. This is advantageous for several reasons, among them being the fact that it causes a frictional resistance to sliding movement of the slip in the frame, and the further fact that the edges of the slip are caused to press firmly against the front face of the back of the panel, and are thereby prevented from riding over one another.

Herein. these advantageous results are ,be under stress in each of the two ways described, thus doubly ensuring against accidental displacement of the slip in its guides.

Usually the name or other data will be applied to the slip while the latter is fiat,

and generally before the slip is cut from a large sheet, because it is most convenient to apply the data by means of a typewriter. So, also, before the large sheet. is cut, and even before the data is applied, the sheet is treated toexclude moisture and dirt, as by placing the sheet in a bath of thin collodion, and then drying-the sheet. In practice, this coating has been applied so thinly that its presence can scarcely be detected. After the data has been applied to the slip, and the latter has been given the described formation, it may be, and herein is, coated again on both sides with transparent protective material, such as collodion, although in most cases the one coating applied before Patent' to secure is:

applying the data is sufficient. When the coating is dried, it serves not only to protect the surface of the'paper from dirt, but, what is more important, it also excludes moisture-from the paper, andthus tends to teristics.

thereto, What Iclaiin and. desirevby Letters 1. An adjustable index comprising, in

disposed edge to edge, havin springs which are held under stress between said guides. I

2. An adjustable index -,comprising, in combination, a series; of index members disposed edge to edge, each comprising a strip I of paper'having an initial "concave-convex combination, a-series ofinde members dis-" v -of paper having an initial concavo-convex' form transversely thereof and a frame in which said strips are held under. stress due to saidform. I r

' 3. An' adjustable index comprising, in

posed edge to edge, each comprising a strip form transversely and longitudinally there-Q of, and a frame in which said strips are held disposed edge to-edge, having a transversely under stress due to said form.

4. An adjustable index; comprising, in combination, a fraine'presenting front and rear guides, and a series of strips of-paper curved formation and thereby constituting springs which areheld under stress between {per from foreign matter. f enhance and preserve'its springlike charac-.

' 5.An adjustable indexcomprising, in

combination, aframe presenting front and Having thus described oneembodimentof rear.'guides, and a series of strips of paper the invention, but Without limitingmyself disposed edge to edge, having transversely curved formation and thereby eonstituting springs which are-held under-stress between said guides,=said str'ipsbeing coated on both sides with materia -which excludes moisture rear guides, and a series of strips of paper disposed edge to' edge, having a transversely curved formation and thereby constituting.

springs which are held understress between said guides, said strips being coated With material Which increases their resistan'ce to bending.-

7, An adjustable index comprising, in

combination, a, frame presenting f-r'ont and rear guides, anda' series of strips of paper disposed edge to edge, having a transversely curved formation and thereby constituting springs which are held under stress betweensaidguides, said stripsbeing-coated with transparent material which. excludes mois- '-ture' from the paper and increases its resistance to bending.

In testimony whereof ,'I have "signed my name to this specification.

JOHN o. LIGGETT.

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