US1163839A - Ground receiving outfit. - Google Patents

Description

C. E. MELLON.

GROUND RECEIVING OUTHT.

APPLICATION FILED AUG. 12. 1913 1,163,839, Patented Dec. 14, 1915.

2 SHEETS-SHEET1,

311 we 11 mm (YE/116M013,

MELLUN.

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AL-"PLICA L L. I

[ION FILED AUG. 12, 1915 Puicntcd Dec. H, 1915.

ZSHL ETS SHEET 2 UNITED STATES PATENT OFFICE.

CHARLES E. MELLON, OF COATESVILLE, PENNSYLVANIA, ASSIGNOR. BY .MESNE AS- SIGNMENTS, TO SAID MELLON. JOHN H. SMY'IHE, C. EDWARD GILLESPIE, AND MOBEY A. PAR-K, ALL OF PARKESBURG, PENNSYLVANIA.

GROUND RECEIVING OUTFIT.

Application filed August 12, 1913.

To all ltt/LOHZ [If may concern Be it known that 1, (names E. MELLON, a citizen of the United States, residing at Coatesville, in the county of Chester, State of Pennsylvania, have invented certain new and useful Improvements in Ground Receiving Outfits; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wireless telegra phy and has special reference to the receiving set of a wireless telegraph station.

One object of the invention is to improve thewiring connection or hook-up of the receiving set of such a station so that waves of very wide range and length may be received clearly and distinctly.

A second object of the invention is to provide an improved form of what is preferably termed a variable resistance device as will be hereinafter described.

A third object of the invention is to provide an improved arrangement which will permit of extremely accurate tuning, the arrangement being such as to pick up the over tones of the message to be received so that selection can be made between the same.

Vltll the abov and other objects in view the invention consists first of all in a certain novel hook up hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed, and second consists in a novel form of what is termed a variable resistance device.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and Figure 1 is a diagram matic view showing the novel wiring arrangement. Fig. 2 is a side view of the variable resistance device partly diagrammatic showing the parts in the position at zero. Fig. 3 is a view similar to- Fig. 2 but showing the parts at 90. Fig. 4 is a section on the line 44 of Fig. 2. y

In order to understand the operation of the invention the improved variable resistance device will first be described. It consists of a pair of hard rubber shells 10 and 11 which are zones of spheres. The shell 11 is mounted within the shell 10 so that one can rotate within the other in order that the Zones may pass through varying Specification of Letters Patent.

Patented Dec. 14, 1915.

Serial No. 784,420.

angles with respect to each other. On the outside of these shells is wound conducting wire and the wires on the two shells are connected in series. The wires on these shells are indicated at 12, and 13 respectively and are represented in the diagrammatic view as the resistances bearing the same numbers. Now it will be seen that by means of this construction the current may be caused to flow through one winding, say 12. in the same direction as through the winding 13, in the opposite direction to said winding, or at any desired angle thereto as may be required. merely by rotating one shell with respect to the other. There is thus provided a tuning device of extreme delicacy as theinductive relations of the two windings may be varied with absolute delicacy instead of the stepped result of shifting the contact in the common type of tuning coil. The particular means for shifting the windings with respect to each other is not shown as this may be done in any desired manner from rough hand manipu lation to such complicated mechanism as may be desired.

V In the receiving set illustrated in Fig. 1 there is provided in the antenna .1 the usual binding post 15 to which is connected by means of a wire 16 one end of a load coil of any preferred type. Leading from this load coil 17 to a series of contacts 18 are the connecting wires 19, these wires being connected to spaced points on the load coil. At 20 is a switch which swings over the circle of the contacts 18 so that the switch may be brought into connection with any one of the wires 19 and consequently the length of load coil between the wire 16 and the switch 20 is regulated.

From the switch 20 a wire 21 leads to a switch 22 which has connection by means of a wire 28 with one end of one of the coils of the variable resistance devices 21. The device 21 is also connected, from the other coil, by means of a wire 25 with the switch 26. From the switch 26 runsa wire 27 which leads to a ariable condenser 28 of the rotary type. From this variable condenser a wire 29 leads to an audion 30 of any preferred form. Connected with this audion by means of the wires 31 and 32 are the battery and the battery rheostat 3%,the same being connected in series by means of a wire. 35.

The wire 31 is also connected by means of a wire 36 with a binding post 3? from which a wire 38 leads to the ground 39. The audion tll is furthermore connected by means oi a wire 40 with the battery -l-1 and this battery is so arranged that each cell thereof is pro vided with a wire 42 leading to a respective contact 43 arranged to be engaged by the free end of a contact arm ll, the latter being connected by means of a wire 45 with the ear piece or receiver i6 of a telephone The other ear piece or receiver head set. 47 of this head set is connected by means of a wire 48 with a wire 49 leading to the binding post 3?. Across the wires 35 and 48 is bridged the variable condenser 50 of the same type of the condenser 28.

From the binding post 12 a wire 51 extends to a switch 552 which is capable of connection through a wire 53 with one end of the variable resistance device 5%, the other end of said device being connected by a Wire 55 with a switch 56 which is in turn connected to the wire 49. Across the wires 27 and 49 is bridged the variable condenser 57, the same being connected to the Wire 27 by means of a wire 58 and to the wire 49 by means of wire 59.

lFhe switches 22 and 26 may be connected, by moving the switches properly, to Wires 60 and 61 which lead to the variable resistance 62, the latter being provided With spaced contacts 63'over which a contact arm 64 may swing, this contact arm being connected to the Wire 61. in like manner the switches 52 and 56 are connected by wires 65 and 66 to another variable resistance 67 provided with the contact points 68 and contact arm 69. Each of these variable resistances prefe ably consists of a hard rubber tube wound with wire, the construction not being necessary here to be shown other than diagrammatic. I i

From the foregoing it will be seen that either of the variable resistance devices 24 and may be cut in the line at Will and at the same time either of the variable resistances (32 and 67 cut out since the cut-ting in of the variable resistance devices 24 and 54 cuts out the variable resistances 62 and 67. It will be seen that by proper manipulation of the switches and '26 both the variable resistance device 2- and variable resistance (32 may be cut out and in like manner proper i'nanipulation of the switches 52 and 56 will cut out both the *ariable resistance device 5% and the variable resistance 67.

l or the purpose of illustrating the apparatus the load coil will be assumed to have an inductance of about three thousand microhenrys. The variable resistance devices will be supposed to consist of two hard rubber shells one six inches in outside diameter and two and one-half inches long and the other one live and one-half inches outside diameter and two and one halt inches long. lfiach of these shells has wound thereon a coil of thirty-six turns of number eighteen cabled wire. The variable resistances 2 and bi each consists of a hard rubber tube. one inch in diameter and eight inches long wound with one hundred sixty turns of number.

eighteen cabled wire. The variable eondensers will each have a capacity of .020 mierofarads. With a set such as this the length of the waves received may vary from one hundred meters to six thousand meters. For instance in receiving a low wave s g' nal, say one hundred meters, the load coil switch is connected to the first point of the contact '18 so that the wires 16 and the switch 20 are connected in series and the load coil cut out. Bot-h *ariablc resistances 62 and 67 are cut in and both variable resistance devices 24: and 54 are cut out and the center and bottom variable condensers 57 and 50 are set at zero, also the audion and high tension batteries are in circuit. The receiving apparatus may then be tuned for the ave by properly adjusting the variable condenser 57 by trial.

F or receiving a long wave of say three thousand meters length the load coal switch -20 is shifted to the last point of the load coil contact 18 so as to throw the entire load coil in series. Both the variable resistance devices 24 and 5% are then cut in and set at one hundred and eighty degrees the variable condensers 28 and 50 are set at one hundred and eighty degrees and the variable condenser 57 is set at sixty degrees. Under these circumstances shifting of either of the condensers 57 or 50 slightly will entirely out out the signal after it is once tuned in by properly adjusting the said condenser. For accurate tuning a slight adjustment in the variable resistance device 54 may be made. Under some conditions two stations are sending at the same time and both have substantially the same Wave length. One station may then be caused to produce louder sounds in the ear pieces than the other by slightly adjusting thevariable resistance device 24:.

As is Well known three different tones can in some systems be recognized as being sent from a single station. With this instrument one can obtain the effect of all three of these Wave lengths or tones if desired or any two may be cut out.

There has thus been provided a simple and elticient device oi the kind described and of the character specified.

Having thus described the invention, what is claimed as new, is

1. The combination with an aerial; of a plurality of tuning devices arranged for connection to said aerial, a variable condenser bridged across said tuning devices, second variable condenser connected in series to one of said tuning devices, an audion connected in series to the second variable condenser, a battery connected in series to the audion, a receiving telephone, electric connections between said telephone and the second tuning device and battery arranged to connect the second tuning device, the telephone and battery in series, a third variable condenser connected in multiple with said telephone to said battery and second tuning device, and a ground connection leading from the connection between the telephone and second tuning device.

2. The combination with an aerial; of a plurality of tuning devices arranged for connection to said aerial, a variable condenser bridged across said tuning devices, a second variable condenser connected in se ries to one of said tuning devices, an audion connected in series tothe second variable condenser, a battery connected in series to the audion, a receiving telephone, electric connections between said telephone and the second tuning device and battery arranged to connect the second tuning device, the telephone and battery in series, a third variable condenser connected in multiple with said telephone to said battery and second tuning device, a ground connection leading from the connection between the telephont vand second tuning device, a second battery, a rheostat connected in series to the second battery, connections between the rheostat and second battery and the audion,-

and a ground connection leading from the connection between the second battery and audion.

3. The combination with an aerial; of a plurality of tuning devices arranged for connection to said aerial, a variable condenser bridged across said tuning devices, a second variable condenser connected in series to one of said tuning devices, an audion connected in series to the second variable condenser, a battery connected in series to the audion, a receiving telephone, electric connections between said telephone and the second tuning de ice and battery arranged to connect the second tuning device, the telephone and battery in series, a third variable condenser connected in multiple with said telephone to said battery and second tuning device, a ground connection leading from the connection between the telephone and second tuning device, a second battery, a rheostat connected in series to the second battery, connections between the rheostat and second battery and the audion, and a ground connection leading from the connection between the second battery and audion, and a load coil arranged to be cut in between the aerial and first tuning device.

4. The combination with an aerial; of a plurality of sets of tuning devices each consisting of a variable resistance and variable resistance device, means for selectively connecting an instrument of each set to the aerial, a variablecondenser bridged across said tuning devices, a second variable condenser connected in series to one of said tuning devices, an audion connected in series to the second variable condenser, a battery con nected in series to the audion, a receiving telephone, electric connections between said telephone and the second timing device and battery arranged to connect the second tuning device, the telephone and battery in series, a third variable condenser connected in multiple with said telephone to said batteryand second tuning device, and a ground connection leading from the connection between the telephone and second tuning device.

In testimony whereof, I aflix my signature, in the presence of two Witnesses.

CHARLES E. MELLON. Vitnesses:

MOREY A. PARK, C. Enw. GILLEsPIn.

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