US1510529A - Shade holder for incandescent electric lamps - Google Patents

Description

Oct. 7, 1924.

I SIMENOWSKY SHADE HOLDER FOR INCANDESCENT ELECTRIC LAMP S Filed Aug. 14, 19 22 L 01.41.15 Sa'meno ws/cy,

WIT/V555,; y v I ATTORNEYS.

Fatented Got. 7, 192%,

pairs sraras rares Louis SIMENOWSKY, or MILWAUKEE, WISCONSIN.

SHADE noLnnn non rncannnscnivr nLEornrcynAMrs.

, Application filed August 14, 1922. Serial No. 581,555.

of Milwaukee and State of Wisconsin, haveinvented a new and useful Improvement in Shade Holders for Incandescent Electric Lamps; and I do declare the following to be a clear, exact, and complete description 1 thereof, such as will enable others skilled in the art to which the invention relates to make and use the same, reference being had to the accompanying drawings for an X- position of a construction in which my invention has been embodied.

The invention relates particularly to the harp which is employed to support the shade of an incandescent electric lamp.

The invention involves an improvement in the construction of the harp, whereby a strong and durable structure may be more economically manufactured.

Constructions of this class comprise two arms which rise from a base at opposite sides of the lamp and are brought together at their upper ends in such a manner as to form a support for the shade. The base'is formed as a collar which rests upon and is secured to the lighting fixture in position to support the upstanding'arms in a practically rigid position, the said arms being joined at their upper ends by means of a similar collar, the opening of which is threaded for the reception of the screw designed to retain the shade ofthe lamp in position.

My invention relates to the manner of attaching the arms to the two collars to complete the harp construction, and comprises a pressed sheet-metal shell adapted to encircle the curved upper and lower ends of the two arms of the harp, so that the latter are firmly held in position to permit threading of the circular opening formed by the said curved ends.

The invention will now be described in detail and the novel features thereof will be pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a view in elevation showing. my invention in position as part of a lighting fixture, and showing the shade thereon, the shade being shown in section.

Fig.- 2 is a view of the harp looking from the bottom thereof, and showing the main ner in which the lower ends or feet of the arms are brought together and secured in position by the embracing ring to form the base. i

Fig. 3 is a like view without the embrac ing ring, and showing the formation of the lower ends: or feet of the arms.

Fig. i is a view of the harp looking from the top thereof and showing the manner in which the upper extremities of the arms are brought together and secured-in position to form the collar or nipple which receives the shade holding screw.

Fig. 5 is a perspective view of a cup drawn from a disc of sheet metal, and shaped to receive the curved feet of the arms as shown in Figs. 2 and 3.

Fig. 6 is a vertical section through the. base, and showing a portion of one of the arms extending upwardly therefrom.

Fig. 7 is a sectional view of a modification, similar to Fig. 6, and showing the lower ends of the arms as connected by tWo embracing rings, fone encircling the other! In the drawing, the numeral 10 indicates electric lighting fixture ,ofordinary form and provided with an interior conduit 11 through which the current wires are led.

The upper end of the conduit supports the base 12 of the harp, the said base-beingconnected to the conduit in any desired man ner so as to produce a rigid support for {t harp and the shade thereon. For instance, the said base may be screwed upon the threaded upper end of the conduit, or held thereon by. a clamping nut 12", or the threaded end of the lamp socket 13 may be screwed on to the end of the conduit and the nut be omitted.

The harp is formed of two arms 14: and 15 bowed outwardly to form a clearance for the lamp bulb 16, when the plug of the latter is inserted in the socket 13. The lower ends or feet of the arms 14 and 15 are curved oppositely as indicated at 17 and 18 respectively, so as to form a circular opening when the feet are assembled in the position indicated in Figs. 2 and 3. The curved feet 17 and 18 in the annular arrangement shown are embraced by a cup l9 pressed from sheet metal and having in theopposite side walls thereof notches 20 and 21, wh ch embrace portions of thefeet at the points where the curves com so-f the stand or pedestal of an incandescent mence. so as to closely embrace the annular formation. After the elements are seated in the cup as described, the upper-edge of the wall of the cup is spun over the curved feet toward the center of the cup so as to unite the parts in a substantial manner. The sheet metal used in the formation of the cup will be of a gauge sufiicient to enable it to withstand outward pressure in case it be desired to tap a thread in the circular opening formed by the meeting of the curved feet. An opening 2-2 in the bottom of the cup, corresponding in diameter to that of the ring may be formed either before or after the assembly. When the structure is completed as described the feet are encased in a ring 23, which tightly embraces the outer surface of the curved feet of the arms and secures the parts in fixed position.

The formation of the ring 24 at the upper end of the upstanding arms is sin'iilar in all particulars to that which has been described in connection with the production of the base, and consequently need not be stated in detail. Fig. 4 may be referred to as showing the upper construction, which differs from the base only in the diameter of the opening. interiorly for the reception of a screw 25, which holds the shade 26 in position upon the harp.

A perforated circular plate 27 for sup porting the shade 26 is placed over the ring 24: and a centrally perforated cap 28 rests upon the shade, the screw 25 acting tc bind the parts as shown in Fig. l, and retaining the shade in position. Y

Ordinarily a single stamped metal cup when spun around the curved formation at the ends of the harp will be suliicient to hold.

the parts against movement in the threadmg operations and in use. Reinforcement can be secured by using a second cup of The opening is threaded slightly enlarged diameter. and placing it upon the reverse side, as shown in Fig. 7. This reinforcement will not however he usually necessary, inasmuch as a single encircling ring has been found suficient.

1 invention may likewise be used for supporting light transmitting bowls in indirect ligliiting systems, by simply re ersing the arrangement of the harp.

Having thus described my invention, what I claim and desire to secure by Let ters liatent of the United States, is:

l. A harp for supporting a lamp shade, comprising two uistanding arms, curved at both ends and meeting to form C-llj'CUlfll openings at the top and bottom of the harp, the end portions of the harp about the openings at the top and bottom being encircled by shells of sheet metal to hold the parts in position, the circular openings formed by the curved meeting ends being interiorly threaded to receive screws for supporting the harp and for supporting the shade thereon. respectively.

A harp for supporting" a lamp shade, comprising two bowed arms curved at their ends to form circular openings at the top and bottom of the harp, sheet metal shells embracing the ends about the said openings to hold the parts in position,the said circular openings formed. by the curved meeting ends of the bars being provided with screw threads cut interiorly thereof for the reception of screw threaded parts to support the harp in position and the shade upon the harp.

In testimony whereof, I have signed my name at lfi lilwaulte this 12th day of August, 1922.

L. SIMENOWVSKY. VVi tnesses 'W. F. \Voonann, JOHN C. KLnIsT.

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