US528560A - Leaf-holder - Google Patents

Description

. (No Model.) ,2 Sheets-Sheet 2, J. H; PENDLETON;

LEAF HOLDER.

Patented Nov. 6, 1894.

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ATTORNEY t INVITE STATES PATENT -rrtcn.

JOHN H. PENDLETON, OF BROOKLYN, NEW YORK.

LEAF-HOLDER.

SPECIFICATION forming part of Letters Patent No. 528,560, dated November 6, 1894.

Application filed December 7, 1893. Serial No. 492,969- (No model.)

To all whom it may concern:

Be it known that I, JOHN H. PENDLETON, a citizen of the United States of America, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Leaf- Holders, of which the following is a specification.

My invention has reference to devices commonly termed leafv holders, which are employed in holding the leaves .of books, music, 850., open.

In some of the leaf holders now in use, it'is necessary first to lift the leaf holding arms from the book and so hold the said arms while turning the leaf, thus necessitating the use of both hands. In others the arms after being lifted are retained and must subsequently be pressed down upon the book. Again, so far as I am aware, such leaf holders as are adapted to be secured directly to the book, are constru eted with reference to their application to the covers of the book, and can be used only with books having board covers.

The objects of my present invention are therefore to provide a leaf holder which can be readily applied to any book regardless of the nature of the covers, which permits the leaves to be readily turned without previously lifting the holder, or making aspecial operation of such lifting, and finally, one which exercises equal pressure on both sides of. the book irrespective of the comparative thickness of said sides.

With these objects in View my invention consists in a book-leaf holder comprising in its construction a clamp adapted to pass between the leaves of the book and to embrace the back thereof, and leaf-holding arms pivotally connected with the clamp and provided with curved bearing ends adapted to engage the oppositesides of the book.

The nature of my said invention will best be understood when described in connection with the accompanying drawings, in which-- Figure 1 represents a face view of a book with my improved leaf-holder attached there to. Figs. 2 and 3 are top views showing the book opened at different places. Fig. at is a perspective view of the holder. Fig. 5 is a plan view thereof. Fig. 6, is a longitudinal section in the plane 6-6 Fig. 4; part being broken away. Fig. 7 is a face view of a modified form for theleaf-holding arms. Fig. Sis a perspective view of part of the same. Fig. 9 is a side View showing a second modified construction for the leaf-holding arms. Fig. 10 is a perspective View illustrating a modified construction for the clamp.

Similar letters of reference designate corresponding parts throughout the several views of the drawings.

Referring at present to Figs. 4, 5 and 6 of the drawings,the letterAdesignates the clamp and B B the leaf-holding arms. The clamp is composed of two members a and b located in planes at right angles'to each other and a post 0, about which latter the leaf-holding arms can turn. In this example the clamp is shown as made of a continuous resilient wire, which may be either brass or steel, the two members a and I) being double and the post- 0 forming a prolongation of one part of member 19. To obtain a better bearing for the leafholding arms, one part of member a may be coiled about the post 0, as at c in Fig. 6.

.The end of this part is then bent over to form a stop 01 for the leaf holding arms. The leafholding arms B B are in this example similarly made of wire and formed with a central coil-e adapted to the pivot post 0 c of the clamp to swivel the said arms. This coil at the same time serves the purpose of a spring for the arms. The opposite ends of the arms are curved as at f forming bearing ends which I have here shown to be substantially circular. However, the curvature may be elliptical, or otherwise, so long as it answers the purpose hereinafter set forth.

The function of the stop dis to prevent the arms B Bfr om turning completely around.

The clamp A is adapted to embrace the back of the book as shown in Figs. 1, 2 and 3. When in position its member a lies flat against the outer portion of the back, while the member I) is between the leaves of the book substantially parallel to the same when the book is closed. Usually the clamp is inserted approximately at the center of the book.

In practice I make the curved bearing ends f substantially circular and from five-eighths to one inch in diameter. The gradually curved approaches permit the leaf to be withdrawn from underone bearingendand to beinwhich turns the leaf beneath the same, thusrelieving the pressure upon the leaf. In view of the pivotal connection of clamp and arms, the pressure of the arms on opposite sides of the book is equal at all times and no strain is thrust on the back when the book is held open at different places, (Figs. 2 and 3.) I desired an extra attachment may be used for slightly lifting the arms. For instance, in Figs. 7 and 8 Ihave sh own the ends of the leafholding arms bent into additional rings ff' adapted to be engaged by the forefinger of the handturning over the leaf.

In the modification shown in Fig. 9, the pivotal coil is formed with two windings e and e, the outer winding 6 being formed by coiling the two limbs of wire toward the center of colic. In this construction both arms BB emanate from the center of the coil insteadof from topand bottom of the same and the holder is thereby made to present a more symmetrical appearance.

While Ihave thus far described the holder as made of wire,.it is evident that either the clamp or the arms, or both, can be made of sheetmetal. In Fig. 10 I have shown a clamp A. composed of members a, I), post c and stOp:d"ma de of sheet metal.

Ido notwish to restrict myself tothe exact mechanical constructionsof the several parts herein shown, since it is evident that they canbevaried without departing from the spirit of my invention.

What I claimas newis--- 1. Av leaf-holder consisting of a spring clamp formed with two members, the one 1 adapted to bear against the back of the book,

and the other to enter the angle formed by the leaves and permitting the leaves to be freely turned in either direction, and leafholding arms projecting from the top of the clamp adapted to reach over the open book, and terminating in rounded bearing ends lying in planes substantially at right angles to the leaves and substantially parallel to the plane of the clamp, substantially as described.

2. A leafholder consisting of a clamp formed of twolongitudinal members adapted to encompass the back of the book and to enter between the leaves thereof, a pivot-post formed at the top of the clamp, and spring leaf-holding arms swiveled to said post to turn in a plane at right angles to said clamp, substantially as described.

3. A leaf-holder consisting of a clamp formed of two members located in planes at right angles to each other and adapted to encompass the book and to enter between the leaves thereof, a pivot-post. formedat the top of the clamp, and spring leaf-holding arms swiveled to said post to turn in a planeat right angles to the clamp and terminating in curved bearing ends, substantially as described.

4. A. book-leaf holder made of wire and consisting of a clamp formedof two double members located in planes atright angles to each other, one part of one of said members lextending upwardly and having a coil about the same. formed from part of the second member and forming a pivot post, and leaf holding arms providedwith a centralspring coil swiveled upon said post, substantially as described.

Intestimony thatI claim the foregoing as my invention I have signed my name, in pres- .fence of two witnesses, this 22dday of Novem .ber, 1893.

JOHN H. PENDLETON.

Witnesses:

A. FABER-DU FAUR, J r., KLAS H. TERNSTEDT.

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