US1992499A - Lighting fixture - Google Patents

Description

Fel?. ze; 1935. D. w. WLENNAN 1,992,499

LIGHTING FIXTURE Filed Feb. 6, 1953 ATTORNEY Patented Feb. 2s, 192.5 1,992,499

UNITED STATES PATENT OFFICE 1,992,499 LIGHTING FIXTURE Donald W. McLennan, Seattle, Wash., assignor to Electrical Products Associates, a. corporation of California Application February 6, 1933, Serial No. 655,307 2 Claims. (Cl. 176-122) This invention relates to electric illumination As herein shown the tubes are connected in seand more particularly tol gaseous glow or arc ries by connecting the outer end terminals of lamps applied to interior illuminating purposes, tubes 1 and 2 with the terminal at the correspondsuchasfor show case or show window lighting. ing end of tubes 3 and 4, respectively, and by 5 Explanatory to the present invention it will connecting the inner end terminals of tubes 2 and 5 here be stated that electrical illumination by 3; these connections being shown at 8, 8a and 8b means of gaseous filament tubes is very desirable in Fig. 1. and advantageous for certain purposes such, for Should these tubes be operated while exposed to example, as show window and shoe case lighting. air, there would be a certain capacity discharge However, gaseous glow lamps, arc lamps or other therefrom which, by reason of there being oXy- 10 lamps wherein an electric discharge is conducted, gen in the surrounding air, would create a cerfor illuminating purposes, through a column of tain amount of ozone which is extremely detrisuitable gas or vapor, such as neon or mercury mental to the preservation of products of a pervapor, produce a certain corona discharge, or a ishable natura-such for instance as meats or vegcertain capacity effect which has the undesirable etables. l5 result of creating ozone and this is very detri- To overcome this formation of ozone and its mental to the preservation of perishable products undesirable results, I enclose the entire series such as meat and Vegetables, which may be in the of tubes and their connecting and terminal porvicinity of the ozone. tions in a transparent envelope or tube 10 leaving Therefore, it has been the object of this invena chamber 11 between them and tube 10 which is 20 tion to provide means in connection with lamps of rst exhausted of all air or gasand is then lled, the above character whereby the creation of ozone with nitrogen, 0r any other Suitable inert gas. is prevented and itsd trimental effects eliminated. The circuit connections 12 and 13 for the se- More specically stated, the present invention ries 0f lamps lead t0 the terminals 0f tubes 1 and resides inthe provision of a transparent, gas 4 through an insulating closure member, 01 plug 25 tight enclosure entirely about the luminous tube, 14 sealed inl the end of tube 10 and exhaustion of or tubes, providing an enclosing chamber therefor tube 10 is effected through a glass tube 15 in the lled with an inertgas which precludes the forplug which, after exhaustion, iS Sealed 01T. mation of ozone. It is manifest then that sincev the formation of Other objects reside in the details of construcozone is dependent upon the presence of oxygen, 30' tion, combination of parts and method employed, and'since the several tubes 1, 2, 3 and 4 are now as will hereinafter be fully described. entirely enveloped in a gas not containing any In accomplishing these and other objects of oxygen, the capacity effect will not operate to the invention, I have provided the improved deform OZOnetails of construction the preferred forms of which The lamp shown is only one form of design 35 are illustrated in the accompanying drawing, that may be used and this form was selected only whereinfor the purpose of illustrating the invention and Fig. 1 is a longitudinal section of a lamp emit is not intended that the claims shall in any way bodying the present invention. be restricted to the design, size or shape of the 40 Fig. 2 is a cross sectional View of the same. lamp but Shall be given'an interpretation that S 40 In its present embodiment, I have illustrated commensurate with the scope of the invention disthe lamp as composed of four luminous tubes arclosed. ranged within an enclosing tube, but it is to be Having thus described my invention, what I 1 explained that I do notJ confine the lamp to any Claim as new therein and desire to secure by Letparticular number or arrangement of tubes since ters Patent iS- 45 it may consist of one or more; it being more de- 1. A lamp of the character described comprissirable to use two or more tubes as this permits ing a plurality of tubular gas lled envelopes in use of such colors that will be the most effective coextensive relation with terminal electrodes on for any particular lighting purpose. which electrical potential is impressed to illumi- Referring more in detail to the drawingnate the lamp and a transparent envelope enclos- 50 1, 2, 3 and 4 designate what may be illuminating ing all of said tubes and iilled with an inert gas. tubes ofthe usual form, herein arranged in paral- 2. A lamp of the character described comprislel, slightly spaced relation and each consisting of ing a series of transparent gas lled envelopes, a transparent, gas tight envelope, filled Witha each with terminal electrodes on which electrical suitable gas such as neon, argon or mercury vapor, potential is impressed to illuminate the lamp, 55 and equipped at its opposite ends with terminal means connecting certain of the electrodes to join electrodes 5 and 6 and sealed in circuit connecthe tubes in a series circuit connection, and a tions 7 through which electrical potential may be transparent envelope sealed about said tubes and impressed on the electrodes to cause illumination lled with an inert gas. of the lamp. DONALD W. MCLENNAN. 60

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