US1901059A - System of electrical distribution - Google Patents

Description

G. B. SCHEIBELL SYSTEM l`0F ELECTRICAL DISTRIBUT'ION- Film1 oct. 21, 195o 1 March 14, 1933.

ATTORNFY Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE GORDON BROWN SCHEIBELL, OF NEWARK, NEW JERSEY, ASSIGNOR TO WIRED RADIO, INC., OF NEW YORK, N. Y., A CORPORATION 0F DELAWARE SYSTEM OF ELECTRICAL DISTRIBUTION Application filed October 21, 1930. Serial No. 490,181.

By invention pertains in general to systems of electrical distribution and specifically relates to means for reducing the attenuation of high frequency current impressed on light and power current distribution networks.

In the system of wired radio broadcasting in which carrier frequency currents are utilized to distribute programs over commercial light and power lines to a multiplicity of consumers, it has been found that certain types of commercial current consuming devices, such as flatirons, heaters, and incandescent lamps of excessive wattage are nonreactive at carrier frequencies and absorb carrier frequency current to an appreciable extent. Such absorption of carrier frequency current obviously reduces the operating efficiency of a wired radio broadcasting system.

One of the objects of my invention consists in producing a system of electrical distribution in which high frequency signals are delivered to a consumers dwelling over light and power lines and in which means are provided at the consumers dwelling to distribute the high frequency signals over independent wire lines.

Another object of my invention consists in producing a consumers local electrical distribution system in which auxiliary lines are provided for the express distribution of high frequency currents and in which all non-reactive commercial current consuming devices are electrically isolated from carrier frequency currents.

A further object of my invention comprises producing a consumers local electrical distribution system in which high frequency currents and commercial light and power currents are directed from a common source over independent wire lines to a plu- `rality of service outlet sockets.

In the drawing which accompanies and forms a part of this specification I have schematically represented one embodiment of the system of electrical distribution of my invention.

According to my invention, carrier frequency currents are impressed upon a commercial light and power distributing network for the distribution of programs to consumers. At the consumers dwelling, means are provided to render the entire local distribution system opaque to high frequency curi rents, thereby avoiding the absorption of high frequency currents by non-reactive current consuming devices ordinarily found in the consumers dwelling. Independent wire lines are coupled to the consumers input supci ply in a manner such as to receive only high 'frequency currents. The independent wire lines serve as a source of high frequency signais for wired radio receiving apparatus in the consumers dwelling, and are adapted to inexpensive construction, inasmuch as appreciable power is not transmitted thereby. Referring to the drawing in detail, a source of commercial light and power current 1 is provided within the central station 70 2 which feeds commercial light and power currents at high voltages into the primary distributing lines 3. A source of carrier frequency current 4 is also provided within the central station 2 and is connected to the 75 lines 3 through capacitive couplings 5. A step-down transformer 6 is connected to the primary lines 3 and provides consumers voltages of the order of 110-220 volts for the secondary lines 7 extending from the sec- 80 ondary winding of the transformer 6. Such an arrangement of primary lines 3, transformer 6, and secondary lines 7, is indicative lof a normal commercial light and power distributing network. The secondary lines 7 are connected to a service switch 8 located within a consumers dwelling 9. A watt-hour meter 10 is connected in series to the service switch 8 for the purpose of integrating the consumers power consumption. A fuse panel 11 is connected in series with the watt-hour meter 10. The

switch 8, watt-hour meter 10, and fuse panel 11, comprise normal service equipment found in a typical consumers dwelling. The delivery circuit 12 extends from the fuse panel 11 and is connected to branch circuits 13 and 14. The delivery lines 12 and branch lines 13 and 14 comprise a distribution circuit normally found in a consumers dwelling.

According to my invention, I interpose a signal blocker 15 in the circuit 12 immediately following the fuse panel l1. This signal blocker 15 comprises a series connected high frequency choke coil 1G and a capacitance 17 connected in shunt. The purpose of the signal blocker 15 is to prevent passage of high frequency currents therethrough. The choke coil 16 greatly restricts the passage of high frequency currents, while the capacitance 17 by-passes any high frequency currents that pass through the choke coil.

In accordance with my invention, auxiliary wire lines 18 are coupled, through capacitive couplings 19, to the output lines extending from watt-hour meter 10. These lines 18 receive only high frequency current, inasmuch as t-he commercial low frequency, or direct, current cannot pass through the capacitive couplings 19. Consequently, the lines 18 may be of inexpensive construction, inasmuch as no appreciable power is transmitted thereby.

Two service outlets 20 and 21 having double sockets 22 and 23 are provided, as shown. The sockets 22 are connected to the wire lines 18, while the sockets 23 are connected to the branch lines 13. A wired radio receiving set 24, employing vacuum tubes as detector and amplifiers, has a signal input connection to the socket 22 of the service outlet 20. The output from the wired radio receiving set 24 is directed to a loud speaker 29. Power supply for operation of the vacuum tubes is obtained from socket 23 of the service outlet 20. A crystal set 25 is shown as being connected to the socket 22 of service outlet 21. An electric fiatiron 26 is connected to the socket 23 of service outlet 21. The receiving set 24 could be situated in any part of the consumers dwelling where several auditors are likely to be gathered, while the receiver 25 could be located in another part of the consumers dwelling for the benefit of one or two auditors. Such an arrangement is merely representative of a typical installation according to my system.

A resistance 27 is shown connected to the lines 14 and is indicative of heavy non-reactive loads such as electric ranges and heaters to be found in a typical consumers distribution system. The incandescent lamps 28 are connected to both the branch lines 13 and 14. Such lamps, especially when of excessive wattage, produce appreciable absorption of high frequency currents. It will be obvious that all of the commercial current consuming devices connected to the consumers local distribution circuit are isolated from high frequency currents by means of the signal blocker 15. Absorption of high frequency currents by the nonreactive current consuming devices is thereby avoided. This makes for more elicient distribution of carrier frequenc programs over the light and power networ inasmuch as a lower signal level can be maintained to reach a given number of consumers, and at the saine time, the quality of the carrier frequency program is undisturbed by the nonreactive current consuming devices.

Although I have shown a preferred embodiment of my system of electrical distribution, it is, of course, to be understood that changes therein will readily occur to those skilled in the art but which will not depart from the intended scope of my invention. I do not, therefore, desire to limit myself to the foregoing except insofar as may be pointed out in the appended claims.

What I claim as new and original and desire to secure by Letters Patent of the United States is 1. In a wired radio broadcasting system in which both commercial power and signalling energy are transmitted over power lines to consumers local distribution lines connected with commercial power consuming devices, means for supplying signalling energy from said power lines comprising, auxiliary wire lines designed for the exclusive transmission of signalling energy, said wire lines being coupled to said power lines in a manner such as to prevent the passage of commercial power thereover and means for preventing the passage of signalling energy over said consumers local power distribution lines, said auxiliary wire lines being disposed with respect to said consumers local power lines for conjoint use therewith in the operation of a radio receiving system requiringboth commercial power and signalling energy.

2. The system in accordance with claim 1 including a service outlet having two se aiate service plugs therein, said plugs being respectively connected with said auxiliary vire lines and said consumers local power ines.

GORDON BROWN SCHEIBELL.

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