US1059665A

US1059665A - Wireless telegraphy.

Info

Publication number: US1059665A
Application number: US291736A
Authority: US
Inventors: Reginald A Fessenden
Original assignee: Individual
Current assignee: HALSEY M BARRETT
Priority date: 1903-07-27
Filing date: 1905-12-14
Publication date: 1913-04-22
Anticipated expiration: 1930-04-22

Description

R. A. FESSENDEN. WIBELESS' TELEGRAPHY. APPLICATION FILED DEG. 14, 1905.

1,U59,665. Patented Apr. 22, 1913.

FIGJ- FIE-L2- WITNESSES:

IMVEIMTOJR M I 1M QUSMMMJI W REGINALD A. FESSENDEN, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIG-NOR, BY

MESNE ASSIGNMENTS, T0 SAMUEL M. KINTNER, 0F PITTSBURGH, PENNSYL- VANIA, AND HALSEY M. BARRETT, OF BLOOMFIELD, NEW JERSEY,'RECEIVERS.

WIRELESS TELEGRAPHY.

roaches.

Patented Apr. 22, 1 9'1 3.

Serial No. 167,242. Divided and this application filed December 14,

1905. Serial No. 291,736.

T 0 all whom it may concern:

Be it known that I, REGINALD A. FEssnN- DEN, residing at Washington, in the 'District of Columbia, acitizen of the United States,have invented certain new and useful Improvements in Wireless Telegraphy, of which the following is a specification.

The invention described in this case, which is a divisionof application Serial No. 167242, filed July 27, 1903, patented Mar. 12, 1912, Number 1,020,032, relates to the tuning of antennae by altering the 'capacity of the antennae; it also relates to tuning by connecting one or more members of a multiple antenna in electrostatic inductive relation; it further relates to the utilization of one or more members of a multiple antenna for sending or receiving and altering an electrical characteristic of the sending. or receiving members by one or more of the other members of the antenna.

The invention is hereinafter more fully described and claimed.

In the accompanying drawing forming part of this specification, Figures 1, and 2 show means for tuning the antennas whether k used for sending or receiving.

In F i 1,'a method is shown of tuning the antennas by changing the capacity of the antennae, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11.

12 is a device whereby more or less of the antenna can be connected at will, and 13 is a coil which may form either the primary of the transformer in which a receiver is placed, when it is desired to receive, or the secondary of a transformer whose primary is in a circuit for producing oscillation when it is desired to send.

Fig. 2, shows an alternative apparatus for accomplishing the same results, where 14,

15 and 16 are antennae, any of which may be switched in as desired by the switch 17 passing over the

contacts

18, 19 or 20 and being connected by the switch 21 so as to send or receive at will, while 22, 23 and 24 are wires which may be connected to the ground at will by. the switch making contactwith one of the

contacts

25, 26, 27 28, 29 and 30 are capacities of diflerent values andit will be seen that on connecting the wire 22 'to ground, the capacity of the vera multiple antenna,

ticalQl l will be largely increased and similarly with the other antennae.

Since one or more members of the multiple antenna may be connected at will, or more capacity otherwise introduced and this changes an electrical characteristic of the antenna, the invention afi'ords convenient means for changing the electrical characteristics of the antenna when alternately using it for receiving and sending. It will be understood that ordinarily an aerial should have less capacity and inductance when receiving than when sendin a. Engineer, vol. 37.) The adv ntages of tuning the antenna by altering the capacity between it and another conductor, will be recognized by those familiar with the art as useful for various other purposes.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is the following: a v

1. In apparatus for the transmission of energy by electromagnetic waves, the combination of an antenna and an operating instrument connected thereto, of several complementary conductors andmeans for altering the'capacity of the antenna by employing the influence of difierent. ones of said complementary conductors.

2. Apparatus for the transmission of energy by electromagnetic waves, comprising an operating instrument and means for connecting various portions of the antenna to the instrument.

3. Apparatus for wireless telegraphy,

comprising a multiple antenna having some of. its members connected to an operating instrument and some of its members connected to ground, and the grounded members being in electrostatic inductiverelation to the active radiating or receiving members, substantially as described.

4. In wireless telegraphy apparatus, an antenna consisting of several conductors and means. to alter the electrical characteristics of some of the members acting as r21 diators by connecting to others of the members, substantially as described.

eral separate conductors and means to alter 5. A multiple antenna consisting of sev'.

the capacity of some of them by the incutting out some of the wmplementary confluence of others selected, substantially as ductors, substantially as described. 10 described. In testimony whereof, I have hereunto set 6. In Wireless telegraphy, the colnbinamy hand.

5 tion of a multiple antenna, connected to op- REGINALD A. FESSENDEN.

erating instruments complementary con- Witnesses: ductors lnfluencing the antenna, and meagls GERTRUDE M. KELLEY, for altering the capacity of the antenna v JESSIE E. BENT.