SU406A1 - Electric filament lamp with two threads - Google Patents

Description

DRAWING electric filament lamp with two filaments.

To the patent of V.I. Bekauri, V.V. Anichkov, V.F. Mitkevich,

for January 27, 1923 (for Article. appointment. No. 76277).

On granting a patent published June 30, 1925. The patent is valid for 15 years from September 15, 1924. The present invention is an incandescent lamp with two or more glow plugs of the same or different luminous intensity, which can be included in the circuit, if desired, or any of these filaments, or any combination of them. The device for the production of these switchings, in contrast to existing systems, is hidden in the lamp base, the switch being made by turning the cylinder to one or another position, or by rotating the button outside, or by other means. The proposed lamp is suitable for any conventional lighting cartridge. In the drawings, an exemplary design of such a lamp is shown: FIG. 1 is a general view of the lamp as assembled; FIG. 2 shows a side view of the lower part of the lamp and the inner base; FIG. 3 shows a section of the lower part of the basement (the insulating porcelain plate is locked) and FIG. 4 is a top view of the switching device. In the cylinder 1 there are two heating filaments 2 and 5. Their common point is connected by wire 4 to the case of the inner base 5, and their other ends are connected to contacts 6 and 7, FIG. 2, 3, embedded in the porcelain bottom of the inner base. On the outer wall of this base there are pegs 8 and .9, by means of which the internal base is held inside the outer base 10. The latter has a screw thread for screwing into a conventional Edisson cartridge. A contact button 11, embedded in an insulating plate 14 of the bottom of the outer base (like a conventional incandescent lamp), is connected to a curved spring 12, which can be pressed against either of pins 6 and 7 or both at once, depending on the position of the pegs 8 and 5 in slots 13, 14. Therefore, by rotating the balloon, it is possible to mount the lamp so that either one or another thread is burned, or both. Electric filament lamp with two filaments, characterized in that the subject matter of the INVENTION.

the common point of the threads 2 and o is connected by conductor 4 to the inner rim of the base, equipped with pins 8 and .9, which are included in slots 13 and 14 of the outer rim of the base 10, the lower contact plate 11 of which through

The bent spring 12 may, when the lamp rotates, be connected to the ends of the strings 2 or 5 by means of contacts 6 or 7, fixed in an insulating base, covering the inner frame 5 from the bottom, and 10.

ff patent V.I.BEMU