US1530904A - Radio apparatus - Google Patents

Description

March 24, 1925.

c. R. MUELLER RADIO APPARATUS Filed Apiil 4 1921 INVENTOR A 7701c NE Patented Mar. 24, 1925. y

PATENT OFFICE.

C. RUDOLPH MUELLER, OF HIGHLAND PARK, MICHIGAN.

RADIO APPARATUS.

Application filed April 4, 1921. Serial No. 458,584.

To all whom it may concern:

Be it known that I, C. RUDOLPH MUELLER, a citizen of the United States of America. residing at Highland Park, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Radio Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings.

My inventionrelates to. radio apparatus, and more particularly to inductance coils and mountings therefor used in radio apparatus. The particular kind or type of inductance coils to which my invention relates is the spider web coil known to the users of radio apparatus as the Turney type of inductance coil.

'- One object of my invention is to provide an inductance coil mounting which will re ceive one or a plurality of inductance coils -which may be easily and quickly taken off or put on in any suitable number, as condi tions may warrant, without change in the mounting apparatus.

Another object of m invention is to provide a mounting where y the angle of either the primary or the tickler coils with rel-4'- tion to the secondary coil or the distances between the same may be'varied to suit conditions.

Another object is to provide a compact structure, pne easily assembled and in whichmany of the parts serve a plurality of purposes, the whole being of simple and cheap construction.

Another object is to provide a structure whereby the secondary coil may be separated, so that the primary coil may be removed a greater distance from the influence of the ticklercoil without entirely removing either part of the secondary coil from the influence of the tickler or primary coil.

With these and other objects in view, my invention consists in the arrangement, combination and construction of the various ,parts of'my improved device, as described in the specification, claimed in my claims, and shown in the accompanying drawings, in which:

Figure 1 is a plan view of a coil mounting constructed in-accordance with my invention.

Figure 2 is an end view thereof.

Figure 3 is a plan view of my improved coil in an unassembled position, showing the inside face thereof.

Figure 4 is a like view of the same coil, showing the outside face thereof.

Like numerals for the same parts in the various drawings are used.

I provide a main support 1 for the entire structure, with four rods 7 projecting laterally therefrom, two on either side of said support, Fig. 2 which act as supports upon which are slidablymounted the two side arms 2 and 8, which in turn act as supports for the primary and tickler coils 27 and 28, respectively. I provide a removable knob 9 on the ends of the rods 7 so that the arms 2 and 3 may be removed therefrom if so desired.

In addition vto being slidable laterally on the rods 7 through the clips 6, the arms 2 and 3 are capable of swinging movement in a horizontal plane through the hinges 5. In order to accomplish this swingin movement of the arms, I have provided handles 8 on the 'ends thereof nearest the operator. These handles also serve to allow the lateral movement of the arms, and are removed from the coils a sufiicient distance to practically nullify hand capacity effect when making the adjustment.

A stationary arm 26 projects at right angles to the main support, upon each side of which may be mounted the secondary coils 29. I have shown the secondary coils split thus because I believe a definite ad-' vantage is gained over the old method of mounting the secondary coil in one piece. For the purpose of certain features of my invention, however, the secondary may be in one piece.

It will thus be seen that I have made arrangement for the mounting: of the three different types of coils, namef the primary, secondary and tickler coils, in such a manner that as many coils of each type as is desired may be used at any desired distance apart and at any desired angle to each other. i The coils themselves are, as before mentioned, of the spider web type consisting of a body portion 30, with center reenforced apertures 20 and wings 31 on the outer portion thereof. The wiring is laced in and out of the wings 31 in the manner shown in Figures 3 and 4, said wiring beginning with inside terminal 18 and ending with outside terminal 21. This outside terminal 21 is led from the top of the coil under insulation 22 and the interlaced wiring to the center-of the coil as shown in Figure 4. On the inner side oi": the coil I provide a strip of insulating material 24, with the wires 19 attached to the coil in any suitable manner. The terminal 18 is electrically connected to these wires 19. On the outer side of the coil I provide a similar piece of insulating material 25 at right angles to the piece of insulating material 24, with wires 23 suitably attached to the outer side of the coil and which are electrically connected to the terminal 21. 4

In mounting these coils upon the apparatus already described,I provide a friction clamp 12, of well known make, upon each of the arms 2 and 3 anda similar clamp upon each side 01" the arm 26, through which projects a piece of conducting material 11 of T' shape. Before fastening the T piece 11 in the clamp, however, I place one of the coils thereon through the center aperture 20 of the coil, so that the head 10 of the T piece 11 is pressed across the wires 23 on the outer side of thecoil, thus forming an electrical connection therewith. I then push the shaft of the T piece well through the clamp until the coil is tight against the arm, where it is held by the said friction clamp 12. If more than one coil is desired on each arm, I

simply remove the T piece from the clamp.

and place thereon as many more coils as are desired arranging the coils with relation to each other so that the wires 23 on the outside of the first coil cross at right angles the wires 19 on the inside of the succeeding coil, so as to form an electrical connection therewith, and continuing in this manner until all the coils desired are inplace and then again insert the T piecell in the clamp 12 as in the case when I only use one coil. For convenience in assembling more than one coil in a circuit in this manner, so that the wires 23 and 19 otthe different coils will always cross at right angles, the insulating pieces 22 on the outer side of the coils may be colored for identification and simply kept in alignment when the coils are assembled. This also serves to keep the coils poled in the same direction.

The electrical connections for the primary and tickler coils are formed in a similar manner, so that I shall describe such connections jointly.

I provide terminal posts 17 on the main support 1, through which the current enters and is conducted thence through a strip or plate of conducting material to the upper rod 7, also of conducting material, thence through the upper part of clip 6 and hinge 5, through a piece of conducting material 15 attached to but insulated from the arms 2 and 3 to the clamp 12, thence through the shaft of the T piece 11 to the head 10 thereof, thence through the wires 23 on the last coil in the circuit to the coils and through the same by reason of their being electrically connected as before described to number 13, which extends broadside of the arms 2 and 3. to the piece of conducting material 16 on the bottom of the arms 2 and 3. Strip of insulating material 14 insulates the member 13 from the clamp 12 and the shaft of the T piece 11; The current then passes through the member 16 to the lower half of the hinge 5, thence through the lower part of the clip 6' to the lower rod 7 and into the terminal post- 36. I provide insulation 37 where the clip 6 joins the rods 7, so that the current which passes through the upper portion thereof going in and the lower portion going out will not short circuit.

Similar connections are made to the second coils on the arm 26 except that the current flows directly from the terminal posts through the conducting material 35 to the clamps 12. on through T piece, coils, member 13 and conducting material on the bottom of the arm 26 similar to that on the top to a terminal. post on the bottom of the main support 1.

lVherevcr necessary in this arrangement of electrical connections I have, of course, provided insulation for the conducting parts.

While I have shown my apparatus as consisting of primary, secondary and tickler coils, the tickler coil may at times be disconnected and only the primary and secondary coils used, if so desired.

Some changes may be made in the arrangement and construction of the various parts of my improved devices without departing from the spirit of the invention therein and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof.

' I claim as my invention:

1. An inductance coil mounting consisting of a main support and arms connected thereto adapted to receive and place in electrical circuit inductance coils, and means whereby a plurality of coils may be added to or taken from the circuit.

2. An inductance coil mounting consisting of a main support and arms connected thereto adapted to receive and place in electrical circuit inductance coils, and means for connecting in one circuit a plurality of said coils by ressing and holding said coils col1ective y together. I

3. In an inductance coil mounting consisting of a main support and arms connected thereto adapted to receive and place in coils, means whereby the distance between the main support and either arm may be varied to compensate for varying numbers or thickness of unit inductances in each circuit, so that coils on the arms when in position nearest coils on the main support may be held parallel with the latter or at any desired angle thereto from to 90.

5. In apparatus of the class described, the combination of primary, secondary and ticlzler coils and a mounting consisting of a main support and parallel arms connected thereto adapted to receive and place in electrical circuit said coils, a means whereby the lateral distances apart and the angles of the tickler and primary coils with respect to the secondary coils may be simultaneously varied.

6. An inductance coil mounting consisting of a main support and laterally extending conducting members attached to said support, parallel coil supporting and conducting arms slideably and hingeably connected to said laterally extending conducting members, means for mounting inductance coils 7. An inductance coils mounting consist- 1 ing of a main support, laterally extending members attached to said support, coil supporting arms slidably and hingeably attached to said laterally extending members,

inductance coils supported by said arms and means including said laterally extending members for forming anelectrical circuit beginning at terminals located on said main support, continuing thru one-or more said coils arranged in series in each circuit and back to other terminals located on said main support.

8. An inductance coil mounting consisting of acoil supporting arm, a friction clamp fixed to said arm, and means held by said clamp for supporting one or more inductance coils in operative relation.

G. RUDOLPH MUELLER.

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