US978606A

US978606A - Electrical tuning device.

Info

Publication number: US978606A
Application number: US51444109A
Authority: US
Inventors: Robert H Marriott
Original assignee: UNITED WIRELESS TELEGRAPHY Co
Current assignee: UNITED WIRELESS TELEGRAPHY Co
Priority date: 1909-08-24
Filing date: 1909-08-24
Publication date: 1910-12-13
Anticipated expiration: 1927-12-13

Description

R. H. MARRIOTT.

ELECTRICAL TUNING DEVICE.

APPLICATION FILED we. 24, 1909.

Patented Dec. 13, 1910.

i l l R. H. MARRIOTT.

ELECTRICAL TUNING DEVICE.

APPLICATION FILED AUG. 24', 1909.

Patented Dec. 13, 1910.

SHEET 2.

3 SHEETS- R. H. MARRIOTT.

ELECTRICAL TUNING DEVICE.

APPLICATION FILED AUG. 24, 1909.

Patented Dec. 13, 1910.

\\ MRW UNITED STATES PAranT run it.

ROBERT E. MARRIOTT, F BROOKLYN, NEW YORK, ASSIGNCR Tfi UNITED WERELESS TELEGRAPH COMPANY, A CORPORATION OF ,MAL'NE.

,ELECTRICAL TUNING 978,606. Specification t tem. PatentedDeo. i910.

Application filed August 2 1909. Serial 514,441.

To all whom it may concern: a view of theframe carrying the movable Be it known that I, Ronnnr H. MARRIOTT, coil shown in Fig. 2. Fig. 8. is another a citizen of the United States, and a resiview of the parts shown in Fig. 7 with the dent of Brooklyn, Kings c0unty, NeW York, movable coi at right angles to the fixed 5 have invented certain new and useful Imcoil. Fig. 9. is a cross-section showing anon provements in Electrical Tuning Devices, other form of the invention, in which two ofwhich the followingis' a spec1fication.- coils are carried by the movable frame, in-

My invention relates to tuning devices, stead of one. Fig. 10. is a detail View of and more particularly to tuning devices emthe conductive guideway for the lower pivot ploying a fixed and a movable coil for vary' pm of the movable frame shown in Figs. 7 65 ing the inductance. and 8. Fig. 11. is a diagram showing the One of the objects of my invention is to connecting circuit of the coils illustrated in provide a variable inductance for the high- F ig. 9. frequency transmission of electrical energy In accordance with the invention,- a fixed forming part of a tuning device, infwhich coil 1. and a movable coil 2. are connected in 70 inductance a fixed coil and a movable coil the receiving circuit of the high frequency are-used, the vsaid coils being capable of besystem for the transmission of electrical enin'gwplacedin inductive relation and being ergy, the particular form of the system conduct-ively connected, and the movable illustrated being one provided with an aerial coil being provided with means for present- 3. to which the coils are connected. The ing one side'and then the other to the fixed coils are connected with ground by means coil, whereby a'variation in the inductanc of a wired. and switch 5. having arms 6 'for tuning is produced. and 7 connected by cross-bar 8., the ground Another object of my invention is to rowire 9 passing through the condenser 10 of vide the apparatus and system descri ed, variable capacity.

with a switching means whereby said fixed The movable coil 2. is carried on a frame and movable coils may be thrown'in'paral- 1-1. and always remains at one side of the lel or in series, as desired. v face of the fixed coil 1. Means are provided Another ob'ect of my invention is to profor bodily moving the coil and frame so as 30 vide a simple form. of mechanism for to alternately present first one side of the .35 actuating the frame carrying the movable coil andthen the other to the fixed coil 1. coil. 7 These means may be varied: In the particu- VVith the. above and other objects in view, lar embodiment of the invention illustrated, my invention consists in the parts, improvethe frame 11.11215 a crank 12 attached therements and combinations more fully pointed to. The. lower end of the cranlr'enters into out hereinafter. the base the lower end turn. 1;; the Referring now tothe drawings which are base. The upper end M of the or r is pro attached to;the specification and form a part vided with .handlel so as to thereof: Figure 1. is a diagrammatic illus of the frame. Suitable me 4o 'tration of the system, showing the circuits. videdfor guiding one end oft...

Fig. 2. is a diagrammatic view of the-aerial. it is revolved by the crank. receiving circuit, containing a fixed coil and pivot pins ll 17, are provided fo a bodily movable, reversible movable coil. pose. These pins are secure-d Fig. 3. illustrates one mode of connection of d move in suitable guide-we; W0 A. U

the fixed and movable coils, the coils being in parallel. and the current flowing so as to diminish the self-induction. Fig. a. shows a parallel connection of the coils with the current flowing so as to increase the selii inductionofthe system. Fig. ,5. shows series arrangement of the coils, the curre ride the and insure re flowing so as to tend-to diminish the 'seii:- .me 11." induction. and Fig. 6. shows a series ar- Snitablemeans'are rangemeniflof coils, the current flowing the fixed 2 -d 5 as to increase theself-induction. Fig. 7. series. .2

vied wi A a reentrant i .1 5 revises purpose. \Vhen the conducting switch-arms 6, 7, are on the contact points 21 and '22, as illustrated in F ig. 1., the

wires

23 and 4 .will connect the two coils 1 and 2 in parallel.

Vhen the switch 5 has its arms 6 and 7 in contact with the switch-contacts and 26 (the cont-act 25 being a dead :ontact), the two coils l and 2 are thrown in series relation. It will be observed that 1 and 2 are in inductive relation with each other during the rotation ofthe coil 2. i

The local receiving circuit, illustrated in Fig. 1., is likewise provided with a fixed coil 27, and a movable coil 28, which coils are in inductive relation. The fixed coil 27 is parallel to and opposite to the face of the fixed coil 1. The two fixed coils 1 and 27 are always in inductive relation and may be separated more or less or brought close together to vary this relation, By mounting the movable coils on frames and in such a manner that they always remain at one side .of the face of the respective fixed coil, the movable coils do not project beyond the face which permits the fixed coils to'be brought close together. The fixed coil 27 and the movable coil 28 maybe thrown in parallel or in series with each other by means of the switch 29 and the arms 30 and 31. These arms cooperate with contact -

buttons

32, 33, 34, and 35, the

buttons

32, 33, and being connected with the circuit as indicated. The pivot points 36 and 37 of the switch are connected by

wires

38 and 39 to opposite sides of the detector 40. A condenser 41 of variable capacity may be connected in the detector circuit, and the telephone 410-, a potentiometer 42 with battery 43 are connected with the circuit at 44 and 45 as usual, and a condenser 400 is inserted between the points 44 and 45 to prevent the battery from running down.

In accordance with my invention, a manipulation of the switches 5 and 29 and a 1'0- tation of the movable coils 2 and 28 results in the arrangement of circuits and fiow of current illustrated in Figs. 3, 4, 5 and 6. \Vith the faces of the fixed and movable coils in juxtaposition, and with a parallel connection of the coils, the windings being connected as shown in Fig. 3, the self-induction of the coils is reduced to the lowest amount. By rotatin the movable coil and presenting the other side thereof to the fixed coil, without changing the connection, '1'. 0;, without moving a switch, the current flows as shown in Fig. 4, which increases the self-induction.

of the said coils. By throwing the switch and placing the coils in series, with the current in opposition, the arrangement shown in Fig. 5 is secured, with an increase of range in the change of self-induction over that of Figs. 3 and 4. By rotating the movable coil, still preserving the series arrangement, thecurrent will flow as shown in Fig. 6, thereby increasing the self-inductionstill further. In other words, the self-induction may. bemade to vary from the amount produced by the arrangement of Fig.3 to that produced by the arrangement in Fig. 6, gradually and by aid of a simple apparatus. By this means the wave length to which the cirpluit is tuned may be correspondingly varie Turnin now to the apparatus shown in Fig. 9, this differs from the other figures in that two coils are carried on the movable frame instead of one. One of these coils and then the other is presented to the fixed coil.

The coils on the moving frame are always connected in parallel relation, as indicated in Fi 9.

Reining to Fig. 11, the connections of the apparatus shown in Fig. 9 will be apparent. Two apparatuses like those in Fig.

'9 are used. One of them is placed in the aerial circuit and the other in the local detector circuit. The two coils, 46, 47, on the movable frame have their centers connected as at 48 by a wire from which a wire 49 leads to a binding post 50 which is con nected with the detector circuit. A branch wire 51 leads from the wire 49 to a switcharm 52. The two outer ends of the

coils

46 and 47 are connected at 53, from which a wire 54 leads to the outside of the fixed coil 55. The inside of the coil 55 is connected by means of a wire 56 to contact points 57 and 58 of the switch. The outsides of the

coils

46 and 47 are also connected by a wire 59 to a switch point 60. The switch point 61 is dead. From switch arm 62 a wire 63 leads to a binding post 64 which is connected with the detector circuit. By the above set of switches and connection, the fixed and movable coils may be thrown in series or in parallel relation with each other. A condenser 65 of variable capacity may be connected between 50 and 64 in a well known manner. To the

terminals

50 and 64 may be connected a detector circuit including a detector 66, a condenser of fixed capacity 67, a potentiometer 68, (the latter supplied with current from a battery 69) and tele hone receiver 70. The antenna circuit inc udes the antenna 71- which is connected to binding post 7 2 which is connected by wire 7 3 to inside of-fixed coil 74 and by wire 75 to switch arm 7 6. The outside of coil 74 is connected by wire 77 to the outsides of the coils 78 and 79. A branch wire 80 leads from the wire 77 to switch point 81. The insides of

coils

78 and 7 9 are connected, from which connection, wire 82leads to switch points 83 and 84. Switch arm 85 connects by means of wire 86 to one side ofa -v-ariable condenser 87, the other side of which is connected to ground by wire 88. Switch point 89 is dead. The fixed and movable coils of the antenna circuit may thus be thrown in series or in parallel. It

will be observed that the

movable coils

46 and 47 are wound in the same direction and the movable coils 78 and 79 are wound in the same direction. Moreover, the inductive "effect of the movable coils on their corre sponding fixed coil is either additive or subtractivein accordance with the movement of 'the frame carrying the movable coils. By separating the fixed coils, the inductive action of the antenna circuit on the detector circuit may be varied.

Having thus described an embodiment of my invention, it will be obvious that many changes may be made in itsform without departing from the principle thereof.

Claims:

' 1. A tuning device for the high frequency transmission of electrical energy, comprisin a fixedcoil, a movable coil, said fixed an movable coils being in inductive relation, and means for bodily moving the movable "coil so as to alternately present one side and then the other to the fixed coil, said movable coil being arranged at all times at one side of the face of the fixed coil.

2. A .tuning device for the high frequency transmission of electrical energy, comprising a fixed coil, a frame, a movable coil secured to one side of said frame, said fixed and movable coils bein in inductive relation,

. and means for bodily moving the frame so as toalternately present one side of the coil and then the other to the fixed coil, said movable coil being arranged at all times at one side of the face of the fixed coil.

3. Atuning device for the high frequency transmission of electrical energy, comprisin a fixed coil, a movable'coil, said fixed an movable coils being in inductive relation, a switch for throwing said fixed'and movable coilsin parallel, and means for bodily moving the movable coil so as .to alternately present one side and then the other to the fixed'coil, said movable coilbein arranged at all times at one side of the ace of the fixed coil.

4. A tuning device for the high frequency transmission of electrical energy, comprising a fixed coil, a movable coil, said fixed and movable coils being in inductive relation, switching means for throwin said fixed and movable coils. in parallel an in series with each other, and means for bodily moving the movable coil so as to'alternately present one side and then the other to the fixed coil.

5. A tuning device for the high frequency transmission of electrical cner comprising a fixed coil, a movable coil, said fixed and movable coils being in inductive relation, said movable coil being arranged at all times at one side of the face of the fixed coil, a frame to which said movable coilis secured, and a crank attached to said frame whereby said frame may be moved to alternately present one side of the movable coil and then the other to the fixed coil.

'6. A tuning device for the high frequency transmission of electrical energy, comprising a fixed coil, a movable coil, said fixed and movable coils being in inductive relation, said movable coil being arranged at all times at one side of the face of the fixed coil, ,a frame on which the movable coil is secured, a crank attached to said frame, and guiding means for said frame, the parts being so constructed and arranged that one side and then the other of the movable coil may be presented to the fixed coil.

7. A tuning device for the high frequency transmission of electrical energy, comprising a fixed coil, a movable coil,'said fixed and movable coils being in inductive relation, said movable coil bein arranged at all times at one side of the ace of the fixed coil, a frame on which the movable coil is secured, a crank attached *to said frame, a pivot for said frame, .iand a conducting guideway for said pivot, the parts being so constructed and arranged that one side and then the other of the movable coil may be presented to the fixed coil.

8. A tuning device for the high frequency transmission of electrical energy,compris'ing a pair of fixed coils, said fixed coils having their faces in'inductive relation and opposite to each other, a pair of movable coils, one for each fixed coil, each movable coil being in inductive relation with the corresponding fixed coil, each movable coil being at all times arranged at one side of the face of the corresponding fixed coil, and means for bodily moving each movable coil to alternately present one side and then the other to the corresponding fixed coil.

9. A tuning device for the transmission of electrical energ of hi h frequency comprisin a pair of xed 001 5, each consisting of a fiat spiral mounted on a frame, said fixed coils having their faces in inductive relation and opposite to each other, and capable of being moved toward and from each other to vary the inductive action, a pair I of movable coils, each consisting of a fiat spiral, each movable coil being in inductive relation with the corresponding fixed coil and each movable coil bein ranged at one side of the ace of the corresponding fixed coil and means for moving each of said movable coils toward and from the corresponding fixed coil.

In testimony whereof, I have signed my at all times arname to this specification, in the presence of two subscribing witnesses.

ROBERT H. MARRIOTT.

Witnesses:

W. C. MARGESON, W. F. BISSING.