US269783A - griswold- - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1 L. P. GRISWOLD'.

SHADE RING CLAMP.

No. 269,783. Patented Dec.26,1'882.-

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(No Model.) v 2 Sheets-Sheet 2.

L. P. GRISWOLD.

. SHADE RING CLAMP. No. 269,783. PatBnted'DemZG, 1882.

E? Witnesses Jaw/min? Zea/019], azmwold.

UNTTE STATES PATENT Three.

LEWIS F. GRISWOLD, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE CHAS. PARKER COMPANY, OF SAME PLACE.

SHADE-RING CLAMP.

SPECIFICATION forming part of Letters Patent No. 269,783, dated December 26, 188?, application filed November 16, 1882. (No model.)

To all whom it may concern:

Be it known that I, LEWIS F. GRISWOLD, a citizen of the United States of America, residing at Meriden, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Shadelting Clamps; and I do hereby declare the following tube a full,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The ghjectot' this invention is to provide novel and improved means for holding lampshades to shade.- rings or other supports, whereby the brittle material of said shades shall be exempted from all risk of fracture arising from such fastening, and a single set of attaching devices may be used with divers sizes ofshades, said devices automatically adjusting themselves thereto. I accomplish this ob ject by providing a shade-ring with movable clamping-plates, which are formed with hooks that catch under the neck of the shade, said plates being fastened to said shade-ring by screws, preferably the same which attach the harp or lamp-support thereto.

1htheaccompanyingdrawings,Figure1 represents a sideelevation oftheshade-ring, shade, and harp of an extension-lamp, my improvement beingapplied thereto. Fig.2 represents a vertical section through the same. Fig. 3 represents a plan view of the shade ring and clamps, and Fig. at represents a detail viewof one of said clamps.

The same letters indicate the same parts in each of the figures. v

A designates the lamp-support or harp; B, the shade-ring, to which it is attached by bolts u a; and C the shade, which is secured to said ring within the annular flange C, that extends down from the outer lower edge of the latter, as usual. All of these parts, as shown, are suited to an ordinary extension-lamp fixture.

Heretofore screws have generally been passed through flange G and turned into the neck of the shade; (which is ordinarily of porcelain orsimilar brittle material,) under the enlarged upper end thereof. This method of attachment is moderately secure; butit inevitably causes the fracture of many shades, and it is not automatically adjustableto suit different sizes. To avoid these defects I employ clamp-plates D D on opposite sides of said shade-ring, each clamp-plate consisting'of a horizontal flat body, (I, having a bifurcated inner end,d, and a down wardly-extending hook, 61 which protrudes through an opening, 0, in the upper flange, C and lower flange, C", which make up the external wall of the shadering. The outer faces of these hooks are preferably adapted by shape and ornamentation to form part of said wall and be flush with the face thereof. The bodies (Z of the clamps rest upon the usual horizontal flange, G on the inside of the shade-ring, and on perforated lugs E, which extend still farther inward therefrom. The perforations or openings of said lugs register with the slots which give the bifurcated shape to the inner ends of said clamping-plates. It is obvious that these plates may be readily drawn into contact with any one of divers sizes of shade, the hooks d catching into the necks thereof, so as to answer the purpose of the ordinary fastening-screws, without any of their inconveniences or defects. Bolts are then passed through the perforations in the lugs E, and the slots in the bifurcated inner ends, d, ofclamping-plates D, and their nets are turned home on top of the latter. These bolts are preferably, though not necessarily, the bolts a a, which fasten harp A to shade-ring B.

These devices are especially serviceable with extension-lamps, but may be used with those of any other kind.

Springs may be employed to render the action of the hooks automatic.

1 am aware that it is notbroadly new to employ clamping-plates for the attachment of a lamp-shade to its means of suspension or support, nor to supply such plates with springs for rendering them automatic, and therefore I do not claim such constructions, broadly; but

What 1 do claim is 1 l. A shade-ring, in combination with sliding clamping-plates having a hook at one end and bifurcated or slotted at the other, and bolts which fasten the same together, substantially as set forth.

\ In testimony whereof I affix my signature in to l 2. A shade-ring provided with perforated 1 presence of two witnesses.

lugs andsicle openings, in combination with bifurcated clamping-plates having hooks for grasping the neck of a lamp-shade, a harp or law p-snpport, and bolts which serve to attach said harp and said clamps to said shade-ring, substantially as set forth.

LE \VIS F. G-RIS\VOLD.

Witnesses:

DEXTER W. PARKER, RALPH A. PALMER.

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