US771819A

US771819A - Wireless signaling apparatus.

Info

Publication number: US771819A
Application number: US21015504A
Authority: US
Inventors: Lee De Forest
Original assignee: Lee De Forest
Priority date: 1904-05-28
Filing date: 1904-05-28
Publication date: 1904-10-11
Anticipated expiration: 1921-10-11

Description

PATBNTBD 001'. 1, 1904.

ndivvmm.

v L. DB FOREST.

WIRELESS. SIGNALING APPARATUS. nrrmunmn rum: mu :8. 1m.

1m menu.

Fig. 1.

WITNESSES: INVENTOR Lee deForeai.

UNITED STATES Patented October 1 1, 1904.

LEE DE FOREST, oF'NnW YORK. N. Y.

WIRELESS SIGNAUNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 771,919, dated October 11, 1904.

Application filed May 25.}, 1904.

'To all whom it may concern:

Be it known that 1, Lou on Fonasr, a citizen of the United States, and a resident ofthe city, county, and State of New York, have invented certain new and useful improvements in Wire I have'discovered that if a horizontal con-- doctor be mounted to swing about a vertical axis and a wave-sensitive device he placed in series with said conductor and the earth or other capacity or in series with two parts of the same conductor the received signal-waves produce currents in said conductor which vary in strength according as the position of the' wires approach or depart from a. position of parallelism with the direction of travel of the waves. By employing as the wave-sensitive device one in which the intensity of indication varies asthe in tensity of the current the position of maximum and minimum effect may be determined from which the direction to the source of the waves may be told.

In Fig. 1 -I have shown a horizontal conductor divided into two parts A A one being a continuation of the other, and a wavesensitivc member 1) interposed in series between these two parts. This conductor is mounted to swing upon a pivot C, so that it may be swung about a vertical axis. Mechanism of any suitable form for making manifest the changes produced in said wave sensitive device are provided. As shown, this consists of a local circuit containing battery B and :telc'd'wnerecciver T. Any other suitable dcvicrs may be employed for this purpose.

in Fig. 2 I have shown the pivot (l-as at orie end of the horizontal conductor A and the Serial No. 210,166. (No modal.)

wave-sensitive device D in series between this conductor and the earth or other capacity E. In Fig. 3 1 have shown a. device like that of nectiou between the extremitiesof the two parts A and A of the collecting-conductor, thus forminga closed circuit containing therein the wave-sensitive member D. This return connection A need not be separated any great distance from the parts A and A", but may, if desired, be somewhat separated therefrom hiany eventl prefer that the horizontal component be much the greaterof the two, as this is what I principally rely upon in the arrangement for producing the desired eifect.

It is not necessary that the collecting-conductor he proportioned to the wave length. In fact, considerations of convenience and practical operations will limit their length. '1 have also found that a great length of cow doctor is not necessary in order to secure satisfactory results sulficient for the practical needs of most cases. As the waves progress along the conductor variations of potential communicated to the wave-sensitive member and produce indications which when vari by swinging the horizontal conductor enable the direction of the transmitting-station to he judge. r 1n the operation of .the device as. herein shown the maximum indication will be obtaioed when'the direction of the collectingconductor corresponds with the direction of wave length of the received waves, means for are produced therein, which variations are propagation of the signal-waves and the miniturning said conductor abouts vertical pivot,

Fig. 1, except that I have made a direct conand an electrical translating device associated with said conductor.

2. Adocnlizer of wirelesssignaling-waves comprising a. horizontal conductor short as compared with a quarter of the length of the received waves, and mounted to be swung about a vertical axis, and an electrical translating mechanism associated therewith.

3. A loenlizer of the source of wireless signnling-wuves comprising ahorizontnl conductorhaving a length independent of the wave length of the signaling-waves and mounted to be swung about a vertical axis, and an elec- "trical translating mechanism associated therewith.

i. A closed-circuit receiving-00nd uctor having a length independent of the wave length of the signaling-wares and mounted to swing about a vertical mils andlmving. a, wave-sensitive member inserted therein and means for melting manifest the variations produced in said wave-sensitive member. 7

In testimony. whereof I have hereunto aflixed my signature, this25th day of May, 1904,

H. L. REYNOLDS, Am'nonso l lown.