US2516035A - Quickly releasable mounting means for lamp shades - Google Patents

Description

July 18, 1950 B. w. WHITE QUICKLY RELEASABLE MOUNTING MEANS FOR LAMP sHADEs 2 sheets-sheet 1 Filed June 25, 1947 "mnmmmm.

Inventor Bertram W White July 18, 1950 B. w. WHITE 2,515,035

QUICKLY RELEASABLE MOUNTING MEANS'FOR LAMP SHADES Filed June 25, 1947 2 sheets-sheet 2 Flag. 3. 405039 Mfg m 29 22 24 55 56 34 ,i QP 2 24 54 2 29 n 5 58 A lglnl 5l 57 5203 4l 422/ l 442// 24 f la 2o 29 o //l/3 2 W/ I7 -f f l 37 34 Inventor Bertram W White By @2mm Patented July 18, ,1950

-QUICKLY RELEASABLE MOUNTING MEANS Fon LAMP snnnns Bertram W. White, Winnpegpllanitoba, Canada Application June 23, 1947, Serial No. 756,403

1 This invention relates to new and useful im provements and structuralA renernentsin lamp shade structures, more specically, structures such as are commonly employed in association with ceiling lamps, and the principal object `of 3 Claims. (Cl. Z110- 128) the invention isto provide astructure of ther character herein described, in which the lamp shade may be quickly, easily and conveniently applied or removed.

Inlamp shade structures of conventional design, the lamp shade surroundingthe. incandesr 1 cent lamp isr usuallyretained inposition by means of three or'morescrewsprovided on the base on which thel incandescent lamp is mounted. Therefore,` in. orderV to remove or to install the lamp shade, it is. necessaryto` loosen or` tighten '1 the retaining screws, as. thev4 case may be.

` It is. therefore, a. furtherobject ofthe invention to simplify the removal and installation of the lamp shade, as. aforesaid. by providing only to a plurality of simultaneously actuated keepers A one locking knob which is operatively connected for retaining the lamp shade in position.

Another object of the inventionis to provide a lamp shade structure which is simple in construction and operation, which Wllnotxeasily become damaged, and which will readily lenditself to economical manufacture.

An additional object of the invention is, to nrovide a lamp shade structure which is otherwise Well adapted for. the purposefor which it is intended.

With the above more important objects in .view and such other objects as mayr becomezapparent as this specificationY proceeds, theinvention consists essentially ofthe constructionand arrangement of parts as shovvnrinV the accompanying drawings in ,WhichzL y Fig. 1 is a perspective View ofthe invention;

Fig. 2 is a vertical cross sectional viewthereof, With the lamp shade removed, the samebeing taken substantially insy the plane, ofthe line 2-2 in Fig. 3;

Fig. 3 .is a cross sectional'viemtaken substantially in the plane of thelineH- in 2f;

vFig.. 4 is afragmentarycross vsectional view showing aportionof the lamp. shade in the locked or secured position.;v

Fig. 5 is across sectional view, similar to that shown in Fig. 4, but illustrating the first step in the removal of the lamp shade;

Fig. 6` is a cross sec-tional view, similar to that shown in Figs; 4 and 5, Ibut illustrating@ the second. step in the removal ofthe lamp shade;

Fig. is a cross sectional view, taken substantially inthe planefo theline I-li'n Fig. 5; v

. 2 Y Figfs-fisa perspective view of the locking knob shaft and bracket used in the invention;

Fig. 9 `is auperspective view of one of the rods: Fig. 10 isa perspective View of another of the rodS;

Fig. 11 is a perspective view of another bracket used in the` invention;

Fig. 12is a perspectiveview of a still further bracket; and

` Fig. 13 is a perspective view of one of the guides used in the invention. Y

Like characters of reference are employed to designate like parts in the specification and 4throughout the several views.

Referringnow to the accompanying drawings in detail, the. invention consists kof a lamp shade structure designated generally by the reference Acharacter' t5, the same embodying in its construction a mounting base I6 which is adapted for attachment to the ceiling in any suitable manner Tand includes an annular wall l1 provided at the lower edge thereof with an annular extension I8 which, in turn, is formed with an inturned liange I9.

They inner edge of the flangeY I9 is upturned as at 20,11 and: serves. as a keeper for a downwardly extending, annularwall 2l provided on a lamp mounting pate 22'. This plate is of a more-orless conventional design, and is. provided with a 'suitable central opening 23 to receive the 'socket for theA incandescent lamp (not shown) andwith a plurality of keyhole apertures 24 to receive the bolts with which the flange of the lamp socket is secured in. place. The structure of the lamp socket, flange and bulb assembly is, of course, of a conventional character and. further description thereof at thispoint is deemed unnecessary.

Avsutable lamp shade 25, formed at themount.- ing-edge portion thereof with an annular groove Ztl-terminated by an out-turned lip 2Tl is receivable in the recess Zw defined by the annulary wall 2li, that is to say, the mounting edge portion of the shade is receivable in said recess, asis best shown in Figures 4 and 5.

The essence of novelty of the invention resides in the provision of the particular means for removably. retaining `the lamp shade in position, said means consisting of a plurality of equally spaced keepers 29, one end portion of which is adaptedto'project into the groove 2li and to Vengagelth-e out-turned lip 2l of the lamp shade 25, asvvill be presently described.

The remaining end portions of the keepers '29 areelnrippecl' with counter-weights 30 and each ofthe keepers is pivoted medially of its length, as at 3 l, to a plate or block 321. A suitable spacer 33 is interposed between each of the keepers and each of the blocks, as will be clearly apparent.

Accordingly, each of the keepers together with the associated spacer and block may be referred to as a keeper assembly, and it will be noted that each keeper assembly is slidably positioned, that is to say, each of the blocks 32 is slidably positioned, in a guide 34, best shown in the accompanying Figure 13. Each of the guides assumes the form of a box-like channel which is formed on one side thereof with a longitudinal opening 35, and is also provided at one end thereof with a mounting flange 36. It will be observed that the flanges 36 of the guides 34 are secured as at 3l to the outer surface of the aforementioned wall 2|, and that the keepers 29 project into the recess 28 through suitable slots 30 with which the Wall 2| is provided,

It will be also noted that the blocks 32 are disposed adjacent the openings 35 of the guides 34, and each block is provided with a suitable aperture to receive an arm 38 of what may be referred to as a bell crank 39. These bell cranks are pivotally connected as at 40 to a plurality of brackets 4| which are, in turn, secured to the outer surface of the aforementioned wall 2| by suitable rivets 42. One of these brackets which has been designated by a distinguishing reference character 43 is similar to the brackets 4|, but is provided with an additional flange 44, formed with an aperture 45, the purpose of which will be hereinafter more fully described.

With reference to the accompanying Figure '1, it will be apparent that by moving the cranks 39 in the direction of arrow `46, the keepers 29 will be retracted in the direction of the arrow 4l into the guides 34, and conversely, by moving the cranks in the relatively opposite direction, the keepers will be projected into the recess 28 through the slots 30'. The various cranks and keepers are adapted for simultaneous actuation, this being accomplished by connecting one crank to another by means of a synchronizing rod 48.

-the counter-weights 36 associated with the keepers 29 will over-balance the keepers, so

Two of these rods are provided for connecting together the three cranks as illustrated in Figure 3, and it will be noted that the rods are provided at the ends thereof with suitable eyes 49 so that they may besecured to the cranks by the pivot pins or rivets 5|), The rods are angulated substantially as shown, so that they clear the wall 2|.

The particular crank which is pivoted to the aforementioned bracket 43 is operatively connected to a further rod 5| which is also attached to an angularly disposed eye 52 provided at one end of a locking knob shaft 53. This shaft is rotatably journaled in a bracket 54, congurated substantially as shown, which is secured to the outer surface of the wall 2|, as at 55, matters being so arranged that an end portion of the shaft 5I projects outwardly from the extension I8 and carries a suitable locking knob 56.

Accordingly, it will be seen that by rotating the knob 56, the rods 5|, 48 will be moved in the direction of the arrows 5l and the dogs 29 will be retracted from the recess 23 into the guides 34. Means are provided for returning the knob 56 to its original position and also, the keepers 29 into their projected positions, said means consistingl 1 of a tension spring 58 which is anchored at one end to the eye 52 on the shaft 53, and at the other end, in the aperture 45 of the lug or flange 44.

Finally, it should be explained that the keepers 29 are provided in the lower edge portion thereof with notches 59 which are adapted to engage the edge portions of the slots 3D' in the annular wall l2| when the keepers are in their projected positions.

Having thus described the structure of the invention, its method of operation will now be eX- plained.

With particular reference to the accompanying Figure 4, when the lamp shade 25 vis in position, the out-turned lip 21 thereof engages and bears upon the projecting portions of the keepers 29 so that the notches 59 engage the adjacent edges of the slots 30', in which manner the lamp shade is firmly and securely held in place.

When it is desired to remove the lamp shade from the mounting base I6, it is only necessary to lift the shade upwardly (in the direction of the arrow 60) while, at the same time, the knob 56 is rotated. This operational step is illustrated in the accompanying Figure 5, and it will be noted that as soon as the lamp shade is raised,

that the notches 59 are disengaged from the edges of the slots 30. Thereupon, by simply turning the knob 56 as aforesaid, the several keepers will be retracted (by virtue of the cranks 39 and rods 49, 5|) into the guides 34, so that the lamp shade 25 may be simply dropped or withdrawn from the recess 28 of the mounting base, as indicated in the accompanying Figure 6.

Thereupon, the knob 56 may be released, and the spring 5B will return the keepers into their projected positions, as will be readily understood. When `it is desired to reinstall the lamp shade, the keepers are again retracted by turning the knob 56, so that the mounting edge portion of the lamp shade may be inserted in the recess 28, substantially as shown in Figure 5. The knob 56 is then released, thereby permitting the keepers to engage the groove 26 of the lamp shade, whereupon by simply relaxing upward support of the lamp shade, the latter will be permitted to "drop so that the lip 2'| thereof bears upon the keepers and urges the notches 59 into their locked position on the edges of the slots 39', as shown in Fig. 4.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure, and accordingly, further description thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in thedetails of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having thus described the invention what is claimed as new is:

1. In Y a lamp shade structure, an annular mounting base, a shade having an outturned marginal lip, projectable and retractable keepers slidable in said base and in projected positions supportably engaging said lip, manually actuated means for projecting and retracting said keepers, said keepers being formed with notches lockably engaging said base when said keepers are projected and supporting said shade, whereby said manually actuated means are positively locked in a keeper projecting position and gravity actuated means for automatically disengaging said notches from saidbase in the absence of supportable engagementof said lip by said keepers.

2. Thedevice as defined in claim 1 wherein said keepers are siidable but pivotally mounted intermediately of their ends and include end portions engageable with said lip, said gravity actuated means comprising counterweight members provided at the remaining end portions of said 5 keepers.

3. The device as defined in claim 1 wherein said base includes an annular Wall formed with slots to slidably receive said keepers, said notches being Number iockabiy engageable with edge portions of said 10 Number slots.

BERTRAM W. WHITE.

REFERENCES CITED The following references are of record in the 15 le of this patent:

6 UNITED STATES PATENTS Name Date Mitton June 6, 1911 French July 10,1923 Glavin Sept. 29, 1925 Marks Jan. 26, 1926 Samuelson Aug. 11, 1931 FOREIGN PATENTS Country Date Great Britain A. D. 1899 Great Britain A. D. 1909 Switzerland 1932 Great Britain 1933

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