US2489650A

US2489650A - Adjustable lamp support

Info

Publication number: US2489650A
Application number: US711277A
Authority: US
Inventors: Landrum Wiley Allen
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-11-21
Filing date: 1946-11-21
Publication date: 1949-11-29
Anticipated expiration: 1966-11-29

Description

Nov. 29, 1949 w. A. LANDRUM 2,489,650

ADJUSTABLE LAMP SUPPORT 2 Sheets-Sheet 1 Filed Nov. 21, 1946 In ventor Wiley Allen Landrum B, @Maa/Ew.

and may 1949 w. A. LANDRUM 2,489,650

ADJUSTABLE LAMP SUPPORT Filed Nov. 21, 1946 2 Sheets-Sheet 2 4 i. .JM

I ureutur B; @Mm

WWW 13m Patented Nov. 29, 1949 UNITED- STATES PATENT OFFICE ADJUSTABLE LAMP SUPPORT Wiley Allen Landrum, Hattiesburg; Miss. .ApplicationNovcmber 21, 19.46; Serial:,No. 71:1,27 7:

,2' Claimsr 1 This invention relates to new and useful imrprovements: and; structural refinements in. adjustable lamps, more specifically, adjustable desk lamps, floor lamps or thelike, and the principal object of the invention is to provide a device oi the character herein described, in which the source of light-and the. shadeassociated therewith may be easily and conveniently adjusted with respect to the lampbase.

A further object of the-invention is to provide an adjustable lampiwhich is simple inconstrum tion, pleasing in..appearance,and, which may be. readily di'sassembledfor purposes. ofinspection or repair..

Another object. ofthei'nvent'ion. is .to provide an adjustablev lamp which,will not easily become d'amagediandlwhich willreadily lendjitself to economi'cal manufacture.

An additionalobjectoi. theinventionis to provide an. adjustable lampwhich. is otherwise. well adaptedrforthepurpose for which it-is intendedi With the abovemore important objects in, View and such other objects as may become apparent, asthis specification proceeds,, the invention con-. sists essentially ofthe construction. and arrangement of parts as shown in the accompanying drawings in which:

Figure 1 isx a perspective view) of the invention.

Figurez is a. cross-sectional view,-taken substantially in the plane of the line .2-2 of Figure 1.

Figure 34 is a cross-sectional view, taken substantially in the plane. of theline. 3-3 in Figure 1.

Figure 4 is an exploded; perspective. view showing a. cradle and a knuckleusedl in theinvention.

Figure 51s aneundersid'eperspective view of a shade used therein, and

Figure 6 isla side fllei/fifiOIhOf: a.:modif1ed embodiment of the invention.

Like character's of reference areusedto designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail,- the invention consists of an adjustable lamp designated generally-bythe reference character Hi, the same embodying in its construction a substantially circular base H consisting of an inner member l2-positioned under aninverted dish-like cover l3.

Thelatter is secured to-the member P2 inany suitable manner and it will be noted that'the member is formed in the undersid thereof with an elongated recess or chamber 14, the purpose of which will be hereinafter more fully explained.

2 The base member l2; may also be provided on the underside thereof with a. plurality of rubber pads: I5 for obviousireasons.

The cover H is provided with an opening l6 communicating with the chamber M of the base member l2 and the opening I6 is surrounded by, an upwardly extending, cradle [1. This cradle is best shown in. the accompanyin Figure 4, wherein it will be noted that itconsists of a pair. of spacedparallel, ears l8.connected together by the side. members, l9. Each of the ears I8 is formed with acentralapertureHand with a pair oidiametrically. opposedfirecesses 2!, one of these recesses simply assuming the form of a notch provided inthevmarginal edge of'the ear.

The recesses 2t arev 'arcuate and concentric with respect tothe apertures 20;

A knuckle.v assuming the form of a tubular member 22 is rotatably positioned in the cradle I] between the ears l'8, the bore of the member 22 beingprovided' atjthe ends thereof with chame f eredportions 23,,

The knuckle 22' is also provided with a, later-f ally projecting extension 24 which is hollow and communicates with the bore of the knuckle. It will be noted" that the extension 24 projects through the opening [6 into thechamber M of the base.

Arv pair of bearingbl'ocks 25 areassociated with the knuckle 22, each consisting of a tubular shank 26 provided, at one, end thereof with a flange '21. This flange is, in turn, equipped with a pair of diametrically opposed, beveled lugs 28; these being of an arcuate configuration and being concentric'with respect to the shank 26.

The shanks 26 are receivable in the apertures Zlliof'the cradle; lrand' the lugs '28 extend through the recesses 21; so thatthe beveled edges thereof rotatably engage the chamfered portions 23 of the knuckle 22.

An assembly screw 29, provided with a nut 30, extends through. the. blocks 25, through the cars- 18 and through-,thebore of the, knuckle 22., whereby the variouscomponentsare secured together. It will. be: noted that the blocks 25, are equipped with suitable counter-bores. to receive the head of the bolt 29 and the nut 30.

The: knuckle 22: carries; an upright, tubular standard 31;, the upperend of the latter forming a fork 32 which straddles a suitable extremity 33 of a carrier 34. A pin 35 is employed. for pivotally connecting the fork 32 to the extremity 33 of the carrier.

The carrier 34 is configurated substantially as shown and is provided with a conventional socket 35 to receive an incandescent lamp 31.

The carrier 34 is also provided with a pair of supporting pads 38 and 39, the former being slidably receivable in an offset strap 40 secured to a reinforcing plate 4| which, in turn, is provided on the inner surface of a suitable lamp shade 42.

The supporting pad 39 is equipped with a bolt 43 which extends through a suitable aperture 44 provided in the shade structure and carries a knurled nut 45. It will be apparent that in this manner, the shade 42 is removably attached to the carrier 34.

The base H is provided with a clevis pin 45, to which is pivotally connected as at 41 one end of a control bar 48. The remaining end of this bar is pivoted as at 49 to an adjusting screw 50, the shank of the latter operatively engaging a screw-threaded bore provided in an adjusting nut I. This nut isv freely rotatable in a suitable aperture provided in the carrier 34.

It should be added that if desired, the aforementioned standard 3l may be equipped with a hand grip 52 which extends partially along the length of the standard and is secured thereto by a set screw 53-.

The current conductors 54 are taken from the lamp socket 35 through the extension 33 of the carrier 34 and thence downwardly through the standard 3|. Thereupon, the conductors 54 pass through the knuckle 22 and through the extension 24 associatedtherewith into the chamber 14 in the base H and are connected to an extension cord 55 terminating in a conventional attachment plug 56. The cord 55 passes outwardly from the chamber 14 through a grommet 51 provided in the marginal flange of the cover I3 and it will be also noted that the cover carries a push button switch 58 which is wired in series with the lamp 3?.

The underside of the chamber [4 is closed by a removable cover plate 59 which is secured to the base member l2 by means of a plurality of screws 60.

When the invention is placed in use, it will be found that the position of the lamp 37 and the associated shade 42 may be readily adjusted with. respect to the base H by virtue of the pivoted standard 3! and thepivoted control bar 48. The control bar extends in a spaced parallel relation to the standard and, accordingly, the'shade 42 will remain at all times substantially parallel to the base ll, regardless of the positional adjustment of the lamp. This is exemplified by the phantom lines 6| in the accompanying Figure 1.

In addition, the carrier 34 and the shade 42 may be adjusted with respect to the standard 3i, this being accomplished by simply rotating the nut 5i and thereby tilting. the carrier 34 about the pin 35.

Referring now to the modified embodiment of the invention illustrated in the accompanying Figure 6, the adjustable lamp designated generally by the reference character is similar to the aforementioned lamp 10, but is primarily intended for use as a fioor lamp rather than as a desk lamp, as in the embodiment already described. The lamp 10 includes the standard H provided with a hand grip l2 and a control bar 73, the same supporting a carrier (not shown) for the lamp and shade l4.

The lower end portion of the standard II is pivoted to a cradle assuming the form of a sleeve 15, the latter also being provided with a clevis 16 to which the lower end of the bar 13 is pivotally attached.

The sleeve 15 is mounted at the upper end of an upright shaft 11, the lower end of which is, in turn, secured to a suitable base 18.

When this embodiment of the invention is placed in use, the lamp may be conveniently adjusted as exemplified by the phantom lines 18, in the manner already described in connection with the lamp 10. If desired, the provision of a switch in the base 18 may be dispensed with and a suitable switch may be associated directly with the lamp socket.

It is believed that the advantages and use of the invention will be clearly understood from the foregoing disclosure and, accordingly, further description thereof at this point is considered 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 the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim as my invention is:

1. In an adjustable lamp, a base, a standard pivoted at one end thereof to said base, a lamp carrier pivoted to the remaining end of said standard, said carrier being formed with an aperture, an internally screw-threaded nut freely rotatable L in said aperture, a screw adjustable in said nut,

and a control bar pivoted at one end thereof to said base, the remaining end of said bar being pivoted to said screw.

2. In an adjustable lamp, a base formed with an opening, a cradle provided on said base at the edges of said opening, said cradle including a pair of spaced ears each formed with a central aperture and with diametrically opposed recesses, a substantially tubular knuckle member rotatably positioned between said ears and formed at its ends with chamfered bore portions, a pair of bearing blocks each including a tubular shank, a flange at one end of said shank and a pair of diametrically opposed and bevelled lugs on said flange, said shanks being receivable in said apertures, said lugs extending through said recesses and irictionally engaging the chamfered bore portions of said knuckle member, an assembly bolt extending through said member and bearing blocks, a standard connected to said knuckle member, and a lamp carrier on said standard.

WILEY ALLEN LANDRUM.

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

UNITED STATES PATENTS Koch Dec. 12, 1944