US1699185A - Radio apparatus - Google Patents

Description

Jan. 15, 1929.

J. H. FLYNN, JR

RADIO APPARATUS Filed May 6, 1926 2 Sheets-Sheet NVENTOR Juv H.T7NN, JR.

A TTORNE Y.

Jan. l5, 1929. 1,699,185

J. H. FLYNN. JR

RADIO APPARATUS NV EN TOR. Jenn H. FLY rmA JR.

, 4, .l TTORNEY.

Patented Jan. 15,

UNITED STATES JOHN H. FLYNN, JR., 0F CINCINNATI, OHIO.

RADIO ArrAnA'rUs.

Application led May 6, 1926. Serial No. 107,201.

The invention relates to radio tuning apparatus. U

The objects of the invention are to provide simple, eflicient, durable, practical, economical and conveniently operative means adapted to tune or effect resonance in -a radio circuit; and to provide means whereby the number of manual operative controls may be reduced, in certain phases of the tuning, thereby permitting a greater number of stages of radio frequency amplification to be included especially, though not exclusively, in a tuned radio frequency radio circuit, without importantly complicating the manual operations required ,to tune the circuit to the incoming'signals.

The invention consists in the combination of the elements, arrangement of the parts and, further, in the details of the construction, as herein set forth and claimed.

In the drawings: A

Fig. 1 isa plan view of a pair of variable condensers having the invention incorporated therein;

Fi l2 is-agsetion taken on spon ing to 2L-2inFig. 1;-

Fig. 3 is a side elevation of/a condenser shaft; 'J f Fig. 4 is a diagrammatical view of a radio ciruit in which t e inventionis' incorporated an Fig. 5- is ay plan lview showing a modied form of the vinvention, with parts broken away .1 l y In-thepreferr'ed construction of the invention as shown i-n Figs.-1 and 2 I provide front a line corre- 1 and rear variable condensers 1 and 2 each of port of the condenser.

which have rear and front sup orts 3 and 4, respectively, maintained in fixe spaced apart relation as by bolts 5 received through holes inV the supports and insulator strips 6. .Threaded 1n hole 7 in front support 4, as shown in Fig. 2, is tube 8 having vnut -9 threaded to its outer protruding end 10. Tubular shaft 11 extending through tube 8, has its end 12 vprotruding through the front sup- 1l by usual se arators 21. The rotor plates are maintaine against forward movement on tubular shaft l1 by flange 22 integral with the tubular shaft.. Nut or ring 23, 'suitably fixed to the tubular shaft, bears in close frictlonal contact with rear rotor' plate 24, whereby the rotor plates are maintained in fixed position.

The stator plates 25, as usual, are arranged 1n fixed relation on bolts 26 which are suitably fixed in insulators 6. The stator plates are disposed in spaced intermediate relation to the respective rotor plates, whereby rotation of tubular shaft 11 moves the rotor plates parallel with the stator plates, thereby varying the capacity of the condenser.

As shown in Fig. 2, the end 12 of shaft 11, of front condenser l, has usual manually operative dial 27 suitable fixed thereto by screw 28 for rotating shaft 11. The end 12 of shaft 11,

of rear condenser 2, has end 29 of metal union 30 detachably secured thereto by screw 31.

Extending through union 30 and shafts 1l,

of front and rear condensers l and 2, and slidable therein, is metal rod or shaft 32 having manually operative dial 33 fixed by screw 34 to its protruding end 35 whichv exten-ds 'through and forwardly of dial 27. v

`The dials 27 and 33 may be rotated independently of each other thereby permitting independent rotation ofshaft 11 [of frontcon- -denser 1] and rod 32. Whenhowcver, it is desirable to rotate rod 32 and shaft v11 of the front condenser, the screw'36 in hole 37 in dial 33, maybe screwed tightly. in contact with dial 27, or irrespective of screw 36 the dials 27 and 33 may be gripped simultaneously by the o erator to accomplish unison rotation of the ials. Other suitable and conveniently operated mechanism may be employed to ena le an operator to conveniently rotate the dials 27 and 33 in unison or independently of each other. For the purpose of ermitting rotation of the rotor platesl 20 o rear condenser 2 through-normal operation of dial 33, the end 30 of the unison 30 is fixed by screw 38 torod 32. By removing screw 3-1 from union 30 the rod 32 may be adjustably positioned with respect to Ashaft 11.

In Fig-5., I show a modified form of the invention in which condenser 1 is utilized in conjunction with coil 39 consisting of usual primary and secondary windings 40 and 41 which are wound on tube 42. The primary.

and secondary windings may be connected withthe stator and .rotorplates of the conoov i densers by usual k'wires 43 and 44, shown broken away. i

The support 45 suitably fixed to tube 42, i'ssecured to shaft 46 by nut 46. The shaft 46 fixed to union 30by screw 31 corresponds to shaft 11, of condenser 2 shown in Figs.

1 and 2. The end 30 of union 30 issecured I lby screws 38, to shaft 32, whereby simul- -vtaneous rotation of the dials (not shown) pendently of one another.

It is apparent that I have invented a high- --ly-desirable device'for the purposes intended, and by the utilization of which multiple tunedl stages of radio frequency may be incorp'orated in a radio set having combined controls that are easily and conveniently operated. In the circuit 47 shown in Fig. 4, four variable condensers land 2 are controllable by two manually operated controls `each of which may comprise dials 27 and 33 capable of being fixed to each other as shown in Figs.

. 1 and 2 for unison operation. When the circuit 47 is tuned t0 the highest efliciency of results capable by unison operation of the condensers, the dials are turned separately whereby the volume of the incoming signals may be increased or reduced at the will of the operator. The condensers may be substituted by variometers, variocouplersor other variable tuned transformers.

Under certain conditions aswhen the grid return leads are connected to `A 48 and +A 49, it .may be desirable to establish an insulation between condensers 1 and2. This resultmay b eefectedby forming union 30 or shaft 32 from4 an suitable electricity nonconductive materia such 'as "hard rubber,

paper, glass or the like.

It is further apparent and I desire that it be fully understood that the inventiony may be made of any siz'e and` constructed of anymaterials .deemed convenient, desirable and suitable for a device .of this character, and while I havedescribed and shown in the drawings particular forms of the preferred constructions which I have found desirable in actually reducing the invention to practice, I desire to emphasize the factthat I intend to include in this application all of lthe mechanical equivalents and substitutes that may fairly be considered to come with- `in the scope and purview of the invention.

For example, satisfactory results maybe 0btained by means of two variable condensers p arranged in tandem relation with each other and controllable in unison by la single dial, if usual compensating condensers, or miniature variable condensers, or compensating plates are utilized incombination with the larger condensers.

What I claim as new and desire to secure by Letters Patent, is: v

1. In a radio tuning apparatus, the combination with a pair of adjustable condensers, each comprising relatively stationary plates and plates of the opposite polarity movable relative thereto, of an operating shaft for said movable plates electrically connected therewith for each of said condensers, a pair of juxtapositioned manually operatiye dials one of which is operatively connected with one of said shafts, a rod, detachable means for adjustably and operativelyl connecting said 4rod with the other of said shafts and said rod being operatively connected with one of said` dials, whereby said' condensers are operated in unison and independently of each other.

2. A radio circuit tuning means, comprising a pair of variable condensers and each having a. shaft with rotor plates secured thereto, a rod, a means for adJustably securing the shaft of one of said condensers to said rod, and a pair of manually operative dials respectively fixed Vto the shaft of one condenser and to said rod, whereby independent rotation of said dials effects a chan e in the capacity of said condensers indepen ently of each other.

3. A radio tuning apparatus comprising a forward and a rearward condenser, each comprising relatively stationary plates and plates of the opposite polarity movable relative thereto, an operating shaft for each condenser for said movable plates electrically connected therwith, .operating mechanism for said shafts and comprising a pairof dials capable of being 'rotated separately or in unison, one of which is fixed to oneof said shafts, a rod, a tubular union to fix said rod to the other of said tubular shafts, and one of said dials fixed to said rod.

4. In a radio tuning'apparatus, a pair of shaft, a second manually operative meansadjacent said first mentioned manually operative means and operatively connected withv said rod whereby lsimultaneous operation of said manually operative means is adapted to actuate said tunmg means in unison, and the independentv operation of said manually operative means effects independent actuation of said tuning means. i

. JOHN H. FLYNN, JR.

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