US1902407A - Static eliminator - Google Patents

Description

March 21, 1933. P. KLIER STATIC ELIMINATOR Filed sept. 24, 1929 Il Il Patented Mar. 21, 1933 ioFFlicEf srArrc ELIMINATOR Application filed September 24, 1929. Serial No. 394,860.

VThis invention relates ,to static` eliminators for radio receiving sets, and has for one of its objects to provide a device of this character which may be readily connected in the antenna lead, which will function etliciently and which will enable the set in connection with which it is used to be finally tuned.

combination and arrangement of parts hereinafter fully described and claimed and il-,l lust-rated in the accompanying drawing wherein l Y Figure 1 is a side elevation of the static eliminator;

Figure 2 is a sectional view on an enlarged scale taken on a plane extending longitudinally and centrally through the static elim` inator;

Figure 3 is a sectional view onan enlargedV scale taken on the 3-3 of Figure 1;

Figure 4 is a similar View taken on the plalne indicated by the line H of Figure 1, anc Fig. 5 is a diagrammatic View illustrating the connection between the coilsof the static eliminator.

The static eliminator comprisesan outer tube 1 which is made of copper and ems bodies a lower section 2, an upper section 3, and an intermediate section 4 having itsend portions arranged within the upper and lower sections. The lower portion 2a of the section 2l is of conical formation and closed plane indicated by the line of the section 3 is of conical formation and open at its upper end. The section 2 is provided. near the upper end of its conical por- Thel coil 13 extends from the lower to the Aupper end of the section 4, and is connected at its lower end to the binding screw 6. vThe upper kend of the coil 13extends into the section 4 through an opening 14 formedin the section, and is insulated from Said section.

An inner tube 15, which is made from' brass, is arranged within the tube section 4, The invention consists in the construction,

and is provided with inner and outer' insu- 'and 17 thereof. The lower end of the coil 18 is connected to the upper end of the coil 13 iating jackets 16 and 17, respectively. AF60 [closely wound coil 18 is arranged'upon the by a lead 19, and the upper end of thecoil 65 184 is soldered within'an opening 20 formed in the upper end of the tube 15, as clearly shown in yFig'. 5. j Y

A plug 21, which is provided with anin- 'sulating jacket 22 made of rubber, has the lower portion thereof arranged within the upper end portion of the tube 15,.V The upper .end of the plug` 21 isreduced and closed and provided with anopening 23 in whichone 7 end Vof a lead 24 isl soldered. The lead 24 extends through the open upper end of the tube section 3 to thereceiving set. The antenna and receiving setbeing diagrammatically illustrated and designatedA 2 5 and 26,-

respectively. The lower end of the'plug 21 isy open, and the plug is provided near said endthereof with an'opening 27. A conductor 28'is centered at one end within the opening.

27, and has its other end soldered tothe inner `side of the tube 15'. at its lower end, and the upper portion 3a The tube 15 is provided nearits lower end waxed paper. A bundle of wires 3 0 have their upper end portions arranged within the tube 15 and below the partition 29, and arranged upon the lower projecting end por- .with a partition 29 which isv made from tions thereof is a cap 31 which is made-of Y brass and has its lower end closed'by a plug 32made of waxed paper. The c ap 31 is provided with an insulating jacket 33 made of tape, and an rinsulating gasket `34 made of rubber is arrangedbetween the adjacent ends of the tube 15 andV cap. The cap 31 is provided between the lower end of the wires 30 and its plug 32 With a mixture and hard oil Which is designated 35.

The outer tube 1 and the inner tube 15, together With the intervening insulation 16 and 17, constitute a condenser. The outer coil 13 is a loading coil, and is connected at its lower end to the aerial lead 7 and the outer tube 1 of the Condenser. is a radio frequency choke coil, has its lower end connected to the upper end ofthe loading coil 13 by the lead19, and has its upper end connected to the inner tube 15 of thecondenser. This tube of the condenser is con-A nected to the receiving set by the lead 24. The Wires 30 constitute a core for the radio frequency choke coil 18,7and the cap or 'reassist the laggingaction of the radio frequency choke coil. This device has been subtuning of a'radio receiving set, and also functions to prevent static from'reaching the The inner coil 18.

of sawdust connected to an antenna, a shield about the outer coil, and an iron core Within the inner member, said core being shorter in length than the inner member and having a portion thereof. extending beyond one end of the inner member.

In testimony whereof I hereunto affix my signature.

PETE KLIER.

-ceptacle 31, together With the oil saturated sawdust 35 therein and contacting with the "core, constitutes means which functions to receiving set. The manner in which the de-iV i 'vice functions to obtain these ends is not understood by applicant.

IVhile I have described the principle of the linvention together With the structure V- Which I now consider the preferred embodimentthereof, it is to be understood that the structure shown is merely illustrative and that such changes may beV made, when desired, as fall Within the scope of the inven-v tion* as claimed.

I claim:--

1. A static eliminator comprising an inner and an outer tubular member of metallic composition, aninner coil about the inner member, one end of the inner coil being adapted to be connected to a radio'receiving set, an outer coil about the outer member, one end of the outer-'coil being adapted to be connected to an antenna, a shield about the outer coil, and an iron core Within the inner memf ber. y

2. A static eliminator comprising Van' inner and an outer tubular memberV of metallic composition, an inner coil about the inner member, one end of the inner coil being adapted to be connected yto aradio receiving Set, an outer coil about the outer member, one end of the outer coil being adapted to be connected to an antenna, a shield about the outer coil, and an iron core Within the inner member and having a portion thereof extending beyond one end ofthe inner member.

3. A static eliminator comprising an inner and an outer tubular member of metallic composition, an inner coil about the inner member, one end of-the inner coil being adapted to be connected to a radio receiving set, an outer coil aboutrthe outer member,

one end of the outercoil being adapted to be

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