US1637739A - Lamp-shade holder - Google Patents

Description

T DAHL LAMP SHADE HOLDER Filed Feb. 10. 1925 Aug. 2, 1927.

INVENTOR T/zarc Dd/ZZ U =4 ATTORNEYS Patented :2, rear. g p

Uta FEED STATES THURE PATENT OFFICE;

DAI-IL, OF NEW YORK, N. Y., ASSIGNOR TO CORONA CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK. i 1

LAMP-SHADE HOLDER.

Application filed February collar is to be tin-endedwhich serves to mount the shade.

Inasmuch as the shell is usually substantially enclosed by a decorative socket cover member, the shade supporting member is attached by reaching the hand inside of the lamp shade and attempting the threading operation, which even under the most advantageous conditions, involves preliminary groping to bring the threads int-o registry, followed by a prolonged threading operation to screw the holder home. It is especially diflicult to perform the turning or screwing operation within the shade of small diameter.. Furthermore, unless the thread on the shade holder matches precisely that on the socket, which in practice, is frequently notthe case, and is correctly enteredthereon the parts may jam in the attempt to couple said members, and forcible rotation either to screw home or to remove the holder preparatory to a renewed attempt to couple it may result in twisting the socket leads with the danger of a short circuit.

It among the objects of my invention to overcome all of the above noted difficulties without complicating the construction, or adding to its cost, or detracting from the security of attachment and without interfering with ready removal of the shade holder from the socket.

In a preferred embodiment of the invention, the metallic shade supporting collar, in addition to being screw threaded is provided with a number of longitudinal slits, determining spring lingers, yielding sutiiciently to permit thrusting the split sleeve over the exterior threads of the socket. The socket is thus firmly gripped by the spring fingers,- the threads on which will naturally enter into mating relationship with those on the socket. If desired, the shade holding collar may then be given a short turn for further security of attachment.

Although various types of shade holders may be coupled to a socket in this manner, I prefer to use a holder having a shade sup- 10,1925. Serial no. s,153.'

porting flange which presses the inner rim of the shade adjacent the socket cover. In the accompanying drawings in which is shown one of various possible embodiments of the' several features of the inven- Figure 1 is a disassembled view in longi tudinal section through a socket, socket cover, shade holder and shade.

Figure 2 is a. similar view parts assembled and c Figure 3 is atop plan view of the shade supporting member. 1

In the drawings, I have used the refer-- ence letter A to indicate a lamp shell of conventional construction. It may be housed within a conventional socket cover of general bell shape. 7 The lamp shade supporting member is shown at C,'the shade'at D, and the lamp bulb at E. l f

More specifically, the socket memberor socket shell A is formed at its closed'end with a threaded nipple 10 into which screws a hollow plug 11 to retain socket cover B in place, the outlet wires from. electrical terminals, in the socket (not shown)ibeing led to a suitable source of current from the plug: The usual screw threads 12 are providedon the exterior of the shell A. The shade supporting member C is of thin readily bendable spring metal such as brass, including a cylindrical collar portion 15 adapted to encircle the shell A and an external trough like flange portion 16 adapted to receive and support the inwardly turned flange 17 at the end thereby determining longitudinal spring fingers which will readily flex outwardly as the collar is thrust over the shell, the threads on the spring fingers ratcheting over the shell threads and mating therewith.

The manner of assembling the device is to'100' engage the flange of the shade holder with the flange of the shade, insert the hand with in the shade and thrust the collar over the lamp shell or socket A. For enhanced security the shell holding collar may be given a short turn or screw feed over the socket threads. I

In assembled relationship, as shown in Fig. 2, the flange 17 of the shade is firmly clamped against vibration between the 10 "showing the 65 I volves no change in the conventional construction of shade holders other than the provision of a few slits which can be introduced. substantially without added cost."

Even though the collar threads lit only approximately those of the socket, secure connection is effected by a single thrust eliminating the need for groping to align the threads or the awkward turning of the shade holder through many revolutions, as required in constructions devoid of the slits.

It will thus be seen thattthere is herein described apparatus in which the several features of this invention are embodied, and which apparatus in its action attains the various objects of the invention and is well suited to meet the requirements or practical use. a y Y r v p a As many changes could be made in the above description and many apparently widely different embodiments of this invention could be made without departing from V the scope thereof, it is intended that all.

matter shown or! described iii the above shall be interpreted as illustrative and not in a limiting sense. 1 i

, Having thus described my invention, what I claim as new and desire to seeureby Letters Patent is 2- 1. The combination with a lamp socket shell of the type having threads on the exterior thereof, of a. metallic lamp shade holder including a threaded collar portion adapted to engage with the threads of the on the shell by a direct ithrust, said holder having a flange for sustaining the weight of a shade with its rim resting on the flange.

2.The combination with a lamp socket shell of the type having exterior threads thereon, of a lampshade holder including a lamp shade supporting part and a threaded collar portion adapted to mate with the threads on the shell, said collar comprising a plurality of spring sections permitting a thrust [it over the shell. i a

3. The combination with a lamp socket oi the type having threads 011 its exterior, of a lamp shade holder including a threaded cylindrical portion having a plurality of longitudinal slits therein and including a shade clamplng flange, said cylindrical member being adapted for engagement with the'exterior ol the shell by :direct thrust and adapted to be further tightened by rota tion.

l. The combination with a lamp socket of the typehaving exterior threads thereon, a cover therefor, a lamp shade holder including a threaded metallic collar portion longi tudinallysplit to permit direct thrust thereof over the threaded exterior of the socket and a lamp shade supporting flange unitary with the collar to sustain a lamp shade and clamp itagainst the rim of the socket cover.

Signed at New York city, in the county of New York and State of New York, this 30th day of January A. D. 1925.

a THURE DAHL

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