US93402A - Improvement in telescopic quadrant-hinge - Google Patents

Description

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Lenen Patent No. 93,402, dma August 10, 1869.

IMPROVEMENT IN TnLnscoPIc QUAnRANT-HINGE.

The Schedule referred to in these Letters Patent and making part of the name.

To all whom it may concern.-

Beit known that I, Amos S. BLAKE, of Waterbury,

inthe county of New Haven, and State of Connecticut, have invented 'a newvand improved Telescopic Piano- Hinge; and I do hereby declare that the following is a' full, clear, and exact description thereof,v which will enable others skilled in the art to make' and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a detail sectional view of my improved hinge, taken through the line a: x, iig. 3.

vFigure 2 is a side view of the same.

Figure 3' is a detail sectional view of the same, taken through the line y y, fig. 1.

and arranged 'as to leave the surface of the wood-work.

to which it is attached entirely smooth for convenience in finishing and polishing said wood-work and in using the instrument; `and It consists in the telescopic hinge, constructed as hereinafter more fully described.

A represents the wood-work to which my improved hinge has been attached. i

`B O D are the main part-s of Athe hinge, which are made curved in the arc of a circle, and the two outer parts C D'are made tubular, so that the parts of the hinge, in opening and closing, may slide upon each other in the manner 'of a telescope;

The parts B and D are. securely attached to, or are formed solid with the plates E, by means of which the hinge is secured to the wood-Work A.

Similar letters of reference indicate corresponding The inner surface oftheouter sides of the parts "Ct and D are grooved longitudinally, and have stop-pins or projections secured or formed'in' them,'.against 'which stop-pins or projections formed upon or attached to the outer sides of the inner parts B and O may strike, to limit the movement of said parts upon each other.

'These stops should be so arranged that each part may move uponfthe next inner part through an arc of about one-quarter of a circle.

The central parts b'c'd, of the parts B C D, are depressed, as shown in fig. 2, so as toserve as a pivot or centre-pin to the hingein its movements.

Thev hinge, when closed, as shown iu'g. 1, should be a little less than a semcircle, the fcentre of the circle being the edges of the adjacent parts of the wood-work to which the hinges are attached, ,so that the saidA edges may be -in close contact 'with but not rub each other as 'the hinged part of said wood-work is'mo'ved.

1n the case of organs and other articles where the hinged part, in being opened, is not required to swing through the arc of a semicircle', or into a position parallel with its former position, as shown in igs. 1 and 2, the part O of the hinge may be omitted, onlytwo parts being used. Y

Having thus described my invention,

I claim as new, and desirel to secure by Letters `Patent-- An4 improved lhinge, made 'in parts so constructed as to slide upon each other in the manner of a telescope, for the purpose set. forth.

' AMOS S. BLAKE. Witnesses:

WILLARD SPENCER, E. LEAVENWORTH.

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