US1907473A - Variable condenser dial construction - Google Patents

Description

May 9, 1933. L. w. EAHLEY VARIABLE CONDENSER DIAL CONSTRUCTION Filed March 17, 1952 5 claimed. may be supported any suitable manner, 55 An object of my invention is to provide a In the present instance, it is shown rigidly variable condenser dial construction Wlilfiii is connected with the panel 8. particularly adapted for use in indicating Upon the shaft 6 is fixedly secured a pulley the exact angular position of the rotor blades "wheel 11, which is operatively connected to a ll of the condenser. ll i 1 b 13 up? u St) A further object is to provide a construcwl eel is Ly secured to asha whicn tion of the class described ha a dial otatabl nounted on a flanged sleeve two indicating hands or arms operati cit ly secured to the panel associated with the dial, one of the hands hethe shaft 14- projec' ing' adapted to, indicate the'approxirnate pc- -'"1 an opening 15 in the panel 8 one T sition of the rotor blades, the other of t "h a dial it") which is rigidly sehands serving to indicate more exactly i angular position of the rotor with respect to I a gear wheei l"? a; ich is rigidly secured 9 the stator. to the *8 1s op r.;trvely connected to A further ohject is to provide a c d w struction having two indicating he n she" The 19 may of the hands being operatively geared t held in position'hy hav ng one other of the hands in such ratio one in a recessed portion 20 l the hands will move completey i ext-encing through hr V dial while the other of the hands tra ich may be rigidly secured o one major division of the dia" further object oi nuy inv 1 vide a dial construction which is e evicted with adapted for use inshort wave rad to a 3U) @ther objects and advantages and men s w in the following specification an me sleeve 25,

features of the invention will he T nich may he slig pointed out in the appended cla "Z. The dial it) inlay,

My invention is illustrated i a la shape and may be c J panying drawing, forming part ot t "n on cation, in which D Q 4 Figure 1 is a front elevational view or a I construction embodying my invent on, et ually or o viding marks 31'. Figure 2 is a top plan view of this construe t ach of these or marks, the scale tion, and s lded into ten equally spaced sections, 9g Figure 3 is a section taken along the l rein the foregoing description of it 3-3 oi: Figure l. l various parts of my invention, the operation lln carrying out my invention, 1 provide thereoi may be readily understood. The

A a variable condenser 1 havlng a stator 2 and hand 28 and the hand 7 may he operatively a rotor 3. The stator is provided with a plugeared together in any suitable ratio, such as rality of stationary plates 4:. The rotor infor instance, a ratio of ten to one. r cludes a plurality of movable plates 5 which Now let us assume that a dial setting of 5W6 are fixedly secured to a condenser shaft 6. is desired. ihe knob 16 may he ra, idly A hand 7 is rigidly secured to the front end turned in a clockwise direction so as to ring N9 Patented May 9, 1933 LESTER W, @F @EUEGAGU, YL'TLINQIS VARIAELE DIAL @UNSTEUG'JLLUKY Application filed March 1 erial Ito. 599,538,

an opening in a panel 8. The panel 8 and: the stator of the condenser are rigidly secured to a base 9. A dial 10 1s concentrically positioned around the shaft 6. The dial My invention relates to improvements in variable condenser dial construction, and it consists in the combinations, constructions, and arrangements herein described and portionoii the shaft 6 which projects through, hand '3 to the major division 2, The leach 16 is now slowly rotated until the hand 28 passes the ,major dividing mark and is stopped directly over the sixth subdividing mark in a clockwise direction'from the major dividing mark 7 The hands now indicate the correct dial setting.

The modification embodying my invention is particularly adapted for operative connection to a rotary condenser of any straight linetype. If my dial construction be used with condensers not of the straight line type, the divisions may be changed to correspond with the characteristic of the condenser, or any suitable mechanism, not shown, may be operatively connected to the condenser or the dial construction whereby the hands may move so as to read correctly on a straight line dial.

I claim:

1. A variable condenser operating and indicating mechanism comprising a condenser having fixed and movable plates, a-rotatable shaft upon which said movable plates are' mounted, a graduated dial through which one end 0fv said shaft extends concentrically, a pointer secured to said end of said shaft for movement over the face of said dial for indieating coarse adjustment of said movable plates, a rotatable sleeve positioned concentrically on said shaft, a fine adjustmentpointer secured to said sleeve and being movable thereby over said dial, a gear secured to said shaft, a motion multiplying gear train operatively connected to said gear and to said sleeve for rotating the latter on said shaft, and means ofi'set axially of said sleeve and shaft for operating the same.

2. A variable condenser operating and indicating mechanism comprising a condenser having fixed and movable plates, a rotatable shaft upon which said movable plates are mounted, a graduated dial, a pointer operatively connected to said shaft for movement over the face of said dial for indicating the coarse adjustment of said movable plates, a rotatable sleeve positioned coaxially with respect to said coarse adjustment'pointer, a fine adjustment pointer secured to saidsleeve and being movable thereby 'over said dial, a member secured to said shaft, motion multiplying means operatively connected to said member and to said sleeve for rotating the latter at a predetermined speed greater than that of the coarse ad ustment pointer, and

means ofi'set axially of said pointers for,

operating said shaft. LESTER W. BAILEY,

emme

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