US1386840A - Radiosignaling system - Google Patents

Description

R. C. CLINKER.

RADIQSIGNALING SYSTEM. APPLICATION FILED uovl 29, 1919.

Patented Aug. 9, 1921.

2 SHEETS-SHEET I- Inventor:

S F? W rm C%$ I m m y b R R. C. CLINKER.

RADIOSIGNALING SYSTEM. APPLICATION FILED NOV. 29, 1919.

1,386,8%0.. Patented Aug. 9,1921.

2 SHEETS-SHEET 2- EIIMII'7Z"MIIIT Inventor: Reginald. Charles ClinKer;

. UNHTED STATES PATENT @FFHQE.

REGINALD CLES CLDTKER, 0F RUGBY, ENG-LAND, ASSIGN OR T0 GENERAL ELEC.

TRIO COMPANY, A CORPORATION OF NEW YORK.

nseam.

To (all whom it may concern:

Be it known that T, REGINALD CHARLES CLINKER, a subject of the King of Great Britain, residing at Rugby, county of Warwickshire, England, have invented certain new and useful Improvements in Radlosignaling Systems, of which the following is a specification.

It is known that by the use of sensitive detectors and rectifiers now availableradlo signals can be receivedwithout any,ae r1al wire by means of acoil or coils set up in a suitable position relatively to the dlrection of the received waves.

The object of my invention is to render such receiving apparatus more readlly portable and more compact. I have found that it is possible to make the frame upon which the receiving coil is the instruments (such as condensers, IGSlStances, batteries and detectors) without any very serious damping of thereceived oscillations due to the presence of metal bod1es within the coil. The coil can be mounted within a wooden casing provided with a handle and this-arrangement results in a very compact and portable apparatus whlch occupies 'as'm'all amount of space.

The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims, the invention itself, however, both as to its organization and method of operation, will best be understood by reference to the following description taken in connection with the accompanying drawing in which Figure 1 is an elevation of the casing with the cover removed showing the coil and other apparatus; Fig. 2 is a plan viewand Fig. 3 is a diagrammatic view of the connections.

As indicated in the drawing, the containing casing 1 is provided with a carrying handle 2. Mounted within the casing is a frame 3 about which the receiving coll 4; is wound, preferably in one layer. The coil is supported on corner pieces 5 so as to provide an air space between the frame and the coil.

, .Mounted within the coil is a variable condenser 20 connected in parallel to the coil. A condenser 6 is connected to the grid 'of a detecting valve 7. Underneath the detecting valve is mounted 'an amplifying valve 8 which is arranged with its axis at right angles to the detecting valve, and which projects outwardly in sucha manner that the Specification of Letters Patent.

wound contain within it Patented Aug. 9, 1192251.

Application filed. November 29, 1919. Serial No. 341,453.

cover of the casing will not close as long as the amplifier is in position. Storage battery 9 supplies current for the heating of the filaments of the valves 7 and 8, the connections being made through'the socket 10, the plug of which is provided with a handle of such length that if it is left in the circuit the door or lid 11 of the case can not be closed. This provides a convenient method of insuring that the filament will not be left connected to the storage battery when the apparatus is not in use. Another battery 26 supplies current for the plate circuits of the valves 7 .and 8. Transformers 30 and 31 are used as indicators, the former for connecting the detector to the amplifier and the latter for connecting the plate circuit of the amplifier to the telephone 23. The frame 13 hinged to the frame 3 carries a coil 14 which is connected in series with the plate circuit of the detector 7. By adjusting the position of the coil 14 relatively to the coil 3 a variable coupling between the coils may be obtained. The casing 1 may be rotatably mounted upon, a pin 15 which can conveniently be secured to the door 11 and enters a socket 16 secured to the casing directly under its center of gravity. When it is desired to operate the apparatus the door 11 may be removed from its hinges and the cas ing mounted on the door in the manner indicated so that the receiving coil may be conveniently rotated to any desired direction. A compass card or scale 17 may be fixed to the inner side of the door 11 and the cooperating pointer 18 secured to the casing. For convenience the pointer may be detachable or hinged to the casing. A magnetic needle 19 may also be mounted on the cover so as to enable the latter to be adjusted until the north of the scale 17 ispointed tothe north.

The telephones 23 may be carried inside the casing and connected in circuit by means of the jacks 27.

The receiving coil 4 is tuned to the frequency of the incoming waves by a condenser 20 and is connected through condenser 6 provided with a resistance leak 21 to the grid of the detector 7 whose plate 22 is fed from the battery 16 through the transformer 30 and the coil 14. The filaments of valves 7 and 8 are heated by current from the battery 9. The secondary of transformer 30 is connected to the grid of valve-8 in the plate circuit of which is the primary of the telephonetransformer 31. A cell of battery 24 may be inserted in the grid circuitof the valve 8 to maintain the id negative. with respect to the filament. g condenser 25 may be provided to allow high frequency current to be shunted around the primary of transformer 30 when the valve 7 produces oscillations.

To receive signals condenser 20 is adjusted until the natural frequency of coil 4 and condenser 20 corresponds to that of the received waves. The coupling between thecoils 4 and 14 is then adjusted by the turning of the latter upon its hinges. The line of direction along which the signals travel is found by turning the casing on its pivot 15 until the signals have no effect upon the instrument, in which position the pointer 18 would indicate the direction desired.

While I have indicated and described the preferred form of my invention it will be apparent to one skilled in the art that many modifications in the precise apparatus used and the arrangement of apparatus as well as in the form of the casing in which the apparatus is assembled may be made without departing from the scope of my invention as set forth in the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1. A receiving apparatus for radio signals comprising a casing, a receiving antenna wound upon a frame within said casing, a receiving circuit associated with said receiving coil, said receiving circuit comprising a tuning condenser and a detector and said tuning condenser and detector being mounted within the frame upon which the receiving coil is wound.

2. A receiving apparatus for radio signals comprising a casing, a receiving antenna wound upon a frame within said casing, a

receiving system comprising an amplifier and a detector and means for operatively connecting said amplifier and detector in the receiving system, said amplifier and detector together with the means for connect ing them in the receiving system being mounted within the-frame upon which the receiving coil is wound.

3. A receiving apparatus for radio signals comprising a casing, a receiving coil wound upon a frame within said casing, a receiving system comprising a detector having plate and grid circuits associated therewith, said receiving coil being included'in said grid circuit, a second coil mounted upon a frame which is hinged to the frame upon which the receiving coil iswound,said second coil being included in the plate circuit of said detector and said detector and the circuit connectons therefor being mounted within the frame upon which the receiving coil is wound.

. 4. A receiving apparatus for radio signals comprising a casing, a receiving antenna wound upon a frame within said casing, a receiving system comprising a detector having plate and grid'circuits associated therewith, said receiving antenna being included in said grid circuit and a. second coil which is included in the plate circiut of said detector, said second coil being hinged to one side of the frame upon which the.

first coil is wound and adapted to be rotated to a position where it .will be inclosed by the frame upon which the first coil is. wound.

In witness whereof I have hereunto set my hand this twelfth day of November,

R. C. CLINKER.

WVitnesses:

JOHN HALFoRD, DOROTHY WHITE.

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