US929487A

US929487A - Wireless signaling system.

Info

Publication number: US929487A
Application number: US49837209A
Authority: US
Inventors: Valdemar Poulsen
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-05-25
Filing date: 1909-05-25
Publication date: 1909-07-27
Anticipated expiration: 1926-07-27

Description

` nrrnn STATES PATE fr OFFICE..

YALDEMAB POULSEN, OF COPENHAGEN, DENMARK.

WIRELESS SIGNALING SYSTEM.

To all whom t may concem:

lie it known that I, VALDEMAR PoULsEN,a subject ot the King ot' Denmark, residing at Copenhagen, 'Denmark, have invented certain new and useful Improvements in Tireless Signaling Systems, of which the following is a t'ull, clear, and exact. description.

My invention relates to a transmitting device for Wireless signaling.

In my prior patent 'Nos-793,608, I have described an apparatus in which the current interruptions for the purpose of obtaining the electric waves, are secured by maintaining an electric arc in an atmosphere of hydrogen or other gas, In the presentv application the same general method is used, but the signals are made by varying the condition ot the atmosphere yin which the electric arc isprodnced, so that. the vibrations are emanated in interrupted lperiods in producing the desired signals. "i Figure t shows an arrangement of circuits embodying:the principles of my invention; F ig. 2 a similar view showing a` slightly moditied arrangement; Fig. 3 is a still tui-ther modilied form of the in vention; Fig. et shows a still -turther modification.

a and b indicate conductors tor the supply current.

( is an imluctance coil.

c denotes the electric are, and is an inductance windingin the vibration circuit., which also includes the usual condenser c.

y/ is av pipe through which tiows hydrogen or a containing hydrogen. Ordinary illuminating gas may be supplied in place otl the lwdrogen or gas containing hydrogein it: desired. i

y; denotes a rubber hose connected to the pipe y, and l indicates a key by which the rubber hose 7) may be intermittently compressed so as to stop the flow of gas therethrough. In operation it. is merely neces- -sary to operate the key f] in the manner of an Specification of Letters Patent. Application led December 24, 1906-, Serial No. 349,674. Renewed Hay 25, 1909.

Patented my 27, 19o-o.

Serial No. 498,372.`

ordinary telegraph key so as to intermib" `tently arrest the tiow of the gas in the pipe g.

The variations in the atmosphere ot the arc c will produce' corresponding variations in the periods ot' current interruptions and in the signals transmitted. This 1s because the system ceases to send out vibrations if the supply of hydrogen or gas containing hydrogen is cut o In Fig. 2 a form ot the invention is shown in which the pipe g is moved-With relation to the arc c so as `to vary thel atmosphere thereof.` r indicates a key by which the pipe g. can be conveniently moved in this vWay.

In Fig. 3, s indicates a perforated strip which is adapted to move across the opening in the pipe g, through which the atmosphere containing hydrogen iiow's. It the strip is perforated with dots and dashescorresponding to a telegraph code, it is evident that a high speed of transmission may be secured,

in the same way as with the mechanical orautomatic transmitters used With ordinary telegraphy.

In Fig. the intermittent iow of hydrogen or gas containing hydrogen is secured by moving a diaphragm or membrane of a chamber through which such gas tovvs. o indicates this chamber, having a `iaphragm t, which can he moved by the key u.

\Vhat I claim, is

In an apparatustorthe wireless transmission of signals, a circuit including an arc, meansI for supplying an atmosphere containingI hydrogen to said arc, and means for varying such supply according to the signalsv to be transmitted.

In witness whereof, I subscribe my signature, 1n the presence of two witnesses.

VALDEMAR POULSEN.

lWitnesses Vlooo BLOM, Cnonn ViLHELM SCHON.