US497533A - Combined flush hinge and support for desks - Google Patents

Description

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.A. OLAYPOOL. GOMBINBD PLUSH HINGE AND SUPPORT FOR DESKS. No. 497,533. Patented May 16,1893;

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I A.-0LAYP00'L. COMBINED PLUSH HINGE AND SUPPORT FOR. DBSKS.

No.f497',533. Patented May 16,1893.

UNITED STATES P T NT OFFIcE.

ALBERT OLAYPOOL, OF TOLEDO, OHIO.

COMBINED FLUSH HINGE AND SUPPORT FOR DESKS.

ELPEGIFICATION forming part of Letters Patent No. 497,533, dated May 16, 1893.

Application filed March 14,1892.

.To all whom it may concern:

Be it known that I, ALBERT CLAYPOOL, of Toledo, in the county of Lucas and State of Ohio, have invented certain new and. useful Improvements in a Combined Flush Hinge" and Support for Desks, &c.; andI do hereby. declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to a hinge, and has for its object to construct a hinge, in which the sections at the point of joinder shall present a smooth surface upon the upper or face side and at the same time form a support for the foldable leaf secured to one section of the hinge.

A further object is to construct hinge sections in which the tongues which interlock shall have a pivoted rotation in which the transverse pivot pin shall pass through the tongues above the center of the same in a horizontal plane, whereby the ends of the tongues may be formed with opposinginclines to act as supports when the sections are in a horizontal alignment, and to allow one section to swing to an acute angle to the other.

The invention consists in the parts and combination of parts described and pointed out in the claim.

In the drawings: Figure l is a perspective view of a combined bookcase and desk with the leaf shown as opened, the hinges being shown in position flush with the surface of the desk leaf and supportingthe same. Fig. 2 is a perspective view of the hinge with the sections separated. Fig. 3 is alike view with the sections assembled. Fig. 4. is a sectional View of a portion of the desk and leaf with 'the hinges applied thereto, the leaf being shown in full lines as opened and supported by the hinges and in dotted lines as closed.

In the ordinary construction of hinges the knuckles through which the pivot pin passes comprise an enlargement atthe end of each tongue so that when the sections are secured Serial No. 424,777- (No model.)

to an article of furniture (as the desk shown) .oted point of the sections being fulcrumed greatly weakens the hinge and requires supporting devices for the leaf as chains or rods. My invention overcomes these objections by reason of forming the tongues with oppositely inclined end surfaces which co-incide withlike inclined surfaces in the grooves and pivoting the sections by passing the pin through perforations formed in the tongues above the horizontal centers of the same, whereby pressure upon the straps when the two sections are in a horizontal plane exerts a direct, or nearly direct pull upon the pivot allowing the full strength of the same thereby forminga strong support and dispensing with the necessity of other supports. I therefore, combine in the one articlea hinge, and support. Ihave shown a desk in which is aleaf secured by my hinge as one illustration of its'use, as it best demonstrates the value of the smooth upper face of the hinge as well as its strength as a support, and also its adaptability to be folded at an acute angle, it being understood that the hinge is more particularly adapted to the finer grades'of furniture where one portion is pivotally secured to another.

l designates the desk, 2 the leaf and desk.

'3 designates the hinge sections comprising the straps 4: provided with holes 5 through which are passed the screws to attach the same to the desk and leaf, the straps 4 being sunk into the wood to form asmooth surface with the top of desk and leaf. On the ends of straps are formed tongues 6. and grooves 7 in which the opposing sections slide and are held pivotally assembled by means of a pin 8 which is passed through perforations 9 formed in the tongues slightly above the horizontal center of the tongue as shown, whereby the oppositely inclined ends 10 of the tongues may swing clear of the inclined portions 11 of the grooves and allow one section to be moved to an acute angle to the other.

Referring to Fig. 3 it will be seen that the ends 10 of the tongues, and the inclined portions 11 of the grooves coincide and abut when the straps are in horizontal alignment thereby forming a tight joint in which each inclined portion acts as a support and the pivot pin so located that any weight upon the straps produces a strain upon the pin in the direction of the length of the hinge. The leaf may be supported at any desired angle to the desk by varying the inclination of the ends of the tongues and grooves.

From the foregoing it will be seen that I have provided a hinge having a smooth upper surface when extended and that from its izonstruction it forms a rigid support for the eat.

It will be observed that the abutting ends of the desk 1 and leaf 2 as at 12 strengthen the fulcrum of the hinge, thereby adding great strength to the support.

IV hat I claim is- A hinge composed of two sections, each section having a plurality of tongues designed to ALBERT OLAYPOOL.

WVitnesses:

WILLIAM WEBSTER, CARROLL J. WEBSTER.

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