US1598415A - Radio apparatus - Google Patents

Description

Aug 31 1926 1,598,415

D. F. ASBURY RADIO APPARATUS Filed D90. 2. 1925 I gnueutoz g, B. 224d ujcy,

Patented Aug. 31, 1926.

UNITED STATES DOBSEY I. ASBURY, OF BROOMES ISLAND, MARYLAND.

RADIO APPARATUS.

Application filed December 2, 1925. Serial No. 72,840.

My invention relates to radio apparatus,

particularly to receiving sets employing plural tuning units having means associated therewith for operating them collectively and individually, as and for the purposes set forth in my copending applications 683,- 756; 687,080; 689,338 and 690,795, my present purpose, generally speaking, being to provide an improved form of common operator for a plurality of tuning units, embodying primarily the characteristics of simplicity, 'cheap'ness, ease of installation and removal, and efiiciency in operation.

With the foregoing and other purposes in view, my invention consists in the novel features of construction, combination and arrangement ofparts as willcbe hereinafter more fully described, illustrated in the accompanying drawings and defined in the appended claims.

In the drawings, wherein like characters of reference denote corresponding parts in the different views Fig. 1 is afront elevation of the plural tuning unit radio receiving set showing my invention embodied therein; and

Fig. 2, an enlarged section on the line 2-2 of Fig. 1.

The'receiving set shown is of conventional form and embodies three tuning units which are duplicates of one another, each consisting as shown in Fig. 2, of a variable plate condenser 10' including a stator a and a rotor b.

The condensers 10, only one of which is shown in detail to avoid unnecessary'repetition, are suitably mounted to one sideof a panel 12, and their rotors b are aflixed, respectively, to their shafts 14, 16 and 18 which extend through openings in said panel and have aflixed thereto, respectively, at the opposite side of said panel, operating dials or wheels 20, 22 and 24. A

Each dial or wheel 20, 22 and 24 carries a short, rotatable shaft 26 and each shaft carries an eccentric 28, while loosely mounted on each rotor shaft 14, 16 and 18, for rotation with respect thereto, is a disk 30, each disk having a slot 32 therein within which the eccentrics 28 respectively operate, whereby, (see application 683,756) when any particular disk 30 is held against rotationand the eccentric associated with that disk is rotated, the dial or wheel carrying such eccentric is.- rotated, causin rotation of the associated condenser rotor On the other hand, due to the interlock provided between each dial 'and its associated disk 30 by the eccentric device associated with each related dial and disk, rotation of any disk 30 imparts corresponding rotation to (the dial, shaft and rotor b of the condenser associated with that disk. A knob 34 on each eccentric shaft 26 rovides a convenient means of rotating said eccentrics.

' As shown in Fig. 1 the tuning units are mounted in staggered relation'with respect to one another, specifically in a triangular relation, and so spaced apart that an inherently resilient rod 36 engaged with the ually, due to the resistance of the two re-' maining tuning units through rod 36 to 7o edges of disks 26 between the latter in the manner shown in Fig. 1 contacts with said when any given rotation of the disk 30 assoclated with the rotor b to be individually rotated, since each eccentric 28 reacts from its associated disk 30, when the latter is held against .rotation,to rotate its associated dial 20, 22 or 24 as the case may be.

Preferably rod 36 is of circular crosssection and operates in V-sha ed grooves formed in the peripheries of dis s 30, whereby it is retained in operative-relation to said disks and is supported in its entirety by the latter, but, of course, said rod may be of any other cross sectional shape and may be retained against accidentaldisengagement from the peripheries of disks 30 in any other desired manner. Furthermore, if it isnot desired to provide means for rotating rotors b individually, disks 30 and eccentrics 28 may be, eliminated and rod 36 may be engaged directly with the edges of dials 20, 22 and 24 in which arrangement it will function exactly the same as in the arrangement shown to impart rotation to rotors b collectively, and if desired rotors Z may be indi- 'vidually adjusted simply by springing rod 36 out ol contact with the dial or disk as the Case may be of the unit to be individually adjusted, or out of contact with the dials or disks of all llllil tXtt'Pl the one to be individually adjusted.

In the event rod 3t; is intended for collectively operating two instead of three or more tuning units, an idler wheel without connection with a tuning unit may be substituted in lieu of any one ot' the disks lit), or in lieu of any dial it), 22 or it, should the latter be used without disks :30 as aforementioned, in which event said wheel wouldprovide a Vernier device l'or operating rod 36.

In connection with rod :36 it will be observed that, due to its inherent resiliency and to the arrangement whereby it is maintained under a bending moment in driving contact with the movable parts it is intended to operate, it reacts from said movable parts to maintain its contact therewith. Said rod may be normally straight or normally curved as the conditions of its use may demand.

I claim:

1. In radio apparatus, a plurality of tuning units a part of each of which is movable, a member adapted for contact under a bending moment with a plurality of said movable parts tor driving them collectively, and means for maintaining a bending moment in said member to hold it in driving contact with said movable parts.

2. In radio apparatus, a plurality of tuning units a part of each of which is movable, and a member in contact with said movable parts for driving them collectively, said member being inherently resilient and reacting from said movable parts to maintain its driving contact therewith.

3. In radio apparatus, a plurality of tuning units a part of each of which is movable, a member adapted for contact under a bending moment with a plurality of said movable parts for driving them collectively, and means for maintaining a bending moment in said member to hold it in driving, contact with said movable parts, said member being supported in its entirety by said movable parts.

In testimony whereof I hereunto atlix my signature.

DORSEY I ASBURY.

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