US1458994A - Attachment for electric lamps - Google Patents

Description

June 19, 1923.

. L. SCHMIDT ATTACHMENT FOR ELECTRIC LAMPS Fi1ed,June 18. 1921 ATTORNEY Patented June 19, 1923.

' asaeea LAMBERT SCHMIDT, or BROOKLYN, NEW Yonx.

'1 mumornvnnvr ron ELECTRIC; LAMPS.

Application filed June is, 1921. Serial Nam-8,694.;

To all whom it may concern Be it-known that I, LAMBERT SCHMIDT, a citizen .of the United States,xand resident of the borough of Brooklyn, countyof Kings,- city and .StateQof New York, have ina vented certain new and useful Improvements in Attachments forElectric Lamps,-

of which the following is a specification.

This invention relates to attachments for electric lamps andmore particularly to such attachments v as are used to hold a shade against the lamp bulb in sucha manner that on the vibration of the lamp or shade,.the

shade will beheld tightly against the bulb so as to/prevent a jarring or concussion of one in respect to: the other. It has heretofore been proposed to providefsuch attachments, but: they have not been entirely satisfactory because on the one hand they require a special form of a lamp shade to fit over aspecially shaped bulb-,arid on the other hand, they require aspecial form of base on .to which the attachment'is applied. Such special devices discouraged the general use of attachments of this kind in view of the expense and inconvenience connected with such special devices.

The object of my invention is to provide an improved attachment which is so arranged that it will huggingly hold a lamp shade against a bulb so as to prevent relative vibratory actions of one in respect to the other and thereby prevent either bulb or shade from becoming'broken, but mainly to provide an improved means whereby any ordinary base or lamp may have applied thereto in a convenient manner the improved attachment without any change whatever in the base or in the lamp bulb .or in the lamp shade. The invention will be more fully described hereinafter and finally pointed out in the appended claim.

In the drawings,

Figure 1 shows a side view of an ordinary base and a lamp bulb with the shade applied thereto which isin the form of the regular shade as found upon the market, the shade being held against the bulb by my improved attachment; 1 t

Figure 2 shows a plan viewof the bottom side of my improved attachment;

Figure 3 is a vertical centralsection of my attachment; 7 V

Figure 4 shows an enlarged view of the socket.

attachment holding the shade against the Similar characters of reference indicate corresponding parts throughout the various views. Referring to the drawings and more particularly to Figure 1, the ordinary Edison, base'iconsisting of a screw threaded portion 1 0,anda small shoulder 11, is there shown as partof the lamp bulb 12. The drawings represent well, known form of both the lamp and base.- The lamp bulbfl2 has the usual fi1ament13. The exterior diameter of the shoulder 11, which is part ofthe well known base is substantially equal tothe exterior and largest diameter of the threaded portion. v

In Figure 1, if a line be drawn through the J outer edge of the threads, that line. will passthrough the exterior surface of the=shoulder 11. ,7 p I I provide a collar 15, shown clearly in Figure 3, in section, which may be said to a be generally of inverted 'U-shape, excepting that it has its exterior side orv flange at an inclination to the plane of the upper surface of the collar. The direction of the inclination is shownby the dotted lines 1616 of Figure 3 and thereby the exterior flange 17 is formed. The'interior flange 18 is substantially perpendicular to the aforesaid.

plane and the annulus 19 is in the aforesaid plane.

shown in Figure 2, the object of these'being to allowa yieldable movement of the parts 21 of the flange 1'8ibetween the cut outs 20.

cesses or cut outs enable a clamping actionto take place so as to give a secure frictional The flange 18 is provided with cutv outs 20,. preferably three in number, as

hold, such as to hold the flanges 24 0f the shade 25 and hence the shade against the bulb. The frictional hold is such that any 7 ordinary vibration of the shade in respect to the bulb is counter acted and the shade is held firmly at all times against the bulb.

To insure this further, the inclined flange 17 of the collar which is also provided with cut-outs 4O acts to press tightly against .the 05 flange 24 of the shade and in so doing -becomes, due .to its resilient charactenshaped into a positon substantially parallel with the flange of the shade. By the continuous pressure thus exerted, the flange 17 serves tohold the flange of the shade firmly against rattling, and at the same time the reaction resulting on the collar or its innermost..

, at 26 is frictionalthe engagement of the parts at 26 being frictional and that at 27 being of a clamping character.

It Will thus be seen that my improvement is such that it may be readily used to combine a shade with a bulb or hold ashade huggingly to a bulb Without danger of having either part vibrate in respect to the other. The construction is such that it may be readily manufactured at a small expense and may be readily applied to existing bases of lamp shades, neither an especially shaped base, nor a special shaped lamp shade being necessary, nor a special shaped bulb being necessary, as was heretofore proposed. The frictional hold obtained is a very secure hold and serves admirably to hold the respective parts in position and at the same time permits, first, a ready dissembling of the parts, and secondly, a ready assembling of the same. r

Having thus described one satisfactory and practical embodiment of my invention,

it is nevertheless understood that the same is susceptible to many other modifications, and I accordingly reserve the privilege of adopting all such legitimate changes as may be fairly "embodied Within the spirit and scope of the invention as claimed.

I claim: i

An attachment for electric lamps comprising a sheet metal annulus of angular form in cross section, having a horizontally disposed flange adapted to surround a lamp plug and'provided with a split flange extending from the inner edge of said horizontal flange and affording a series of resilient tongues for frictional clamping engagement Wltll'thG plug, said annulus also having a second flange at the outer edge'of said horizontal flange "inclined inWardlyin convergent relation to said split flange and of greater Width than the latter, said inclined flange being adapted for frictional clamp ing engagement With the terminal flange of y a lamp shadeto support said shade in ap- BER r sor-mrn'r]

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