US2585176A

US2585176A - Lamp shade having a thermoplastic molding securing it to supporting arms

Info

Publication number: US2585176A
Application number: US768391A
Authority: US
Inventors: Joseph J Scherer
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-08-13
Filing date: 1947-08-13
Publication date: 1952-02-12
Anticipated expiration: 1969-02-12

Description

Feb. 12, 1952 J. J. SCHERER' 2,585,176

LAMP SHADE HAVING A THERMOPLASTIC MOLDING SECURING IT TO SUPPORTING ARMS Filed Aug. 15, 1947 INVENTOR. JOSEPH \Z'SCHF/PEE ATTORNEYS Patented Feb. 12, 1952 SHADE. HAVING Av THERMOPLASTIC MOLDING SECURING IT TO SUPPORTING ARMS.

Joseph J. Scherer, Cleveland, Ohio Application August 13, 1947, Serial No. 768.391

6 Claims.

The present invention relates generally to the fabrication of articles of paper, laminated, plastics, or similar thin sheet materials, and frames of metal or the like, and is more particularly com cerned with a lamp shade of novel design and construction and improved economy.

It is a principal object, of my invention to. provide means whereby lamp shades and similar articles may be manufactured more easily and quickly and at less expense than heretofore.

It is a further object of my invention to provide a lamp shade of novel, pleasing appearance and of improved strength and durability.

It is still a further object of my invention to utilize resinous materials and particularly thermoplastic synthetic resins in the construction of lamp shades and thereby enable a substantial saving of metal and a corresponding lightening of the article.

Further objects and advantages of this invention will become apparent as the detailed description proceeds.

Referring to the drawings accompanying and forming a part of this specification,

Figure 1 is a perspective view of a lamp shade embodying this invention;

Figure 2 is a fragmentary vertical sectional view of the shade of Fig. 1;

Fig. 3 is a perspective view of the skirt and shad of Fig. 1, showing how it is formed in its upper edge portion to facilitate assembly of the shade with the frame and supporting means for the shade; and

Fig. 4 is a fragmentary exploded perspective view of a lamp shade frame embodying this invention in another suitable form.

The illustrated lamp shade in general comprises three principal parts, namely a metal frame ID, a parchment skirt II and means [2 securing the skirt to the frame. The frame is composed of a thin flat ring core M which may if desired be formed with threads therein for engagement with a threaded fitting (not shown) carried by a lamp with which the shade is to be used. Three arms I5 extend outwardly from the ring at equal intervals around the circumference thereof, and have outer doubled ends which are encased in blockshaped feet lb of molded thermoplastic material.

The skirt 1 I is hollow and frustro-conical, having an upper edge provided with three notches i la at equally spaced intervals around its periphery and a lower unbroken edge portion. A ring I8 of thermoplastic resinous material and of generally L-shaped cross section i attached to the lower edge of the skirt, extending entirely around 2.. the edge thereof and covering the outsideurface of the skirt adjoining said edge.

Means [2 for joining the skirt and frame comprises a ring 20 of thermoplastic material of a shape similar to ring [-8. This ring, like ring 18 encompassing the lower edge of Skirt H, is. at.- tached to the skirt by a. resinous. cement. having the property of adhering to, both. the. material of the shade and that, of the. ring, or may be fastened thereto in any other convenient. manner as by direct heat sealing. Joining of ring 20 to, feet.

of the frame is similarly accomplished, but. in a c da e w t y preference, the, thermoplastic. materials are subjected to, heat to effect oftening along their interfaces. and are then cooled to produce substantially integral connection between the parts.

The thermoplastic resin employed may be se:

lected from any number of commercial. thermm" p st at ials. such as c lul se, acetate. cellulose acetate butyrate or polystyrene. In any case, however, the upper ring and the feet should be of the same, or at least compatible thermoplastic substances in order that a strong and durable bond can be produced after the manner described. The skirt itself may be coated or impregnated with thermoplastic material to facilitate bonding of the rings thereto.

Although I have particularly described but one form of this invention, I contemplate other forms not departing inventively therefrom, as will be apparent from the appended claims. In particular, I have in mind, for example, employing three elements 22 of relatively small size for ring 20, in which case the structure would be substantially lighter and in certain shade sizes would be fully as pleasing in appearance and as practical and durable as the ring structure described. In this case the three elements might extend the full vertical length of the skirt and join the lower ring, if increased strength in the shade is re-- quired.

From the foregoing description it will be appreciated that the structure of this invention not only is much less complex than that or the ordinary lamp shade, but also that the manner of joining the parts is novel and offers considerable advantage in time and material savings. It requires only that heat he applied to two or several relatively small parts having small surfaces in order to soften the surfaces, and then to remove the heat to effect a very strong integral connection between the parts. This is in contrast with the metal wire or rod shaping and binding operations involved in the manufacture of the conventional lamp shades.

Having thus described the invention so that others skilled in the art may be able to understand and practice the same, I state that What I desire to secure by Letters Patent is defined in what is claimed.

What is claimed is:

1. A lampshade comprising a frame including a core and arms extending outwardly therefrom, a skirt depending from the outer ends of said arms, and means for securing the skirt to the frame comprising thermoplastic synthetic resin members attached to said skirt and molded around and encasing the outer ends of said arms.

2. A lampshade comprising a frame including a core and arms extending outwardly therefrom, a hollow frusto-conical skirt having a plurality of notches in one edge portion, and means for securing the skirt to the framecomprising a thermoplastic synthetic resin member attached to said skirt and to the outer ends of said arms, said member comprising a ring encircling the periphery of said edge portion on the outside of the skirt and having a plurality of enlarged parts extending through said notches and molded around and encasing said outer ends of the arms.

3. A lampshade comprising a frame including a core and arms extending outwardly therefrom and carrying thermoplastic resin feet at their outer ends, a hollow frustro-conical skirt having a notched edge, and means for securing the skirt to the frame comprising thermoplastic synthetic resin members cooperating to define a segmented ring encircling and attached to the notched edge of the skirt and secured to said feet.

4. A lampshade comprising a frame including a core and arms extending outwardly therefrom and carryingfeet of thermoplastic resin at their outer ends, a hollow frustro-conical skirt having a notched edge and a thermoplastic resin ring attached to and extending around its other edge, and means for securing the skirt to the frame comprising a thermoplastic synthetic resin member attached to said skirt and integrally attached to said feet, said member comprising a ring extending around and engaging the notched edge of the skirt.

5. A lampshade comprising a frame including .acore and arms extending outwardly from and attached to the core and carrying feet of resinous plastic at their outer ends, a skirt having a resinous plastic coating, and means for securing the skirt to the frame comprising a resinous plastic member attached to the skirt and to said feet, said member extending around an edge portion of the skirt.

6. A frame for a lampshade including a core, arms extending outwardly from the core and attached thereto, and thermoplastic resin members molded around and encasing the outer end of said arms.

JOSEPH J. SCHERER.

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

UNITED STATES PATENTS Number Name Date 2,025,568 Brown Dec. 24, 1935 2,026,939 Greenan Jan. 7, 1936 2,117,240 Cohon May 10, 1938 2,118,893 Meerbeck May 31, 1938 2,206,508 Labuda July 2, 1940 2,269,128 Ross Jan. 6, 1942 FOREIGN PATENTS Number Country Date 482,042 Great Britain Mar. 22, 1938