US1519591A - Rheostat - Google Patents

Description

Patented nee/1e, 1o24. i

UNITED .STATES 'HAROLD DE vEAU PERRY, or CINCINNATI, omo, assIGNoR, B mrsNn AssIGN-J 1519591 PATIENT orricaff MENTS, T0 SKYLARK RADIO.' CQRPORATION, A CORPORATION 0F DELAWARE. I'

mmosram.

PERRY, a citizen of the United States,

new and useful' Improvements in Rheos'tats;

' of which theffollowing is a specification..V

' My "invention vrelates' to rheostats, of a for use on radio receiving sets.

My improved device'ls very rugged vand horizontal type, and isespecially adapted compact, occupies a small .panel space and A and is composed of asmallnumber of simple 'par f' The complete' length of the resistance-unit ,mayrbe covered in one motion, Whereas,

other types in general use require .a plurality of movements.

' .M invention is ill'hstrate-i the accom- 20 y P l; Q

Figure 1, is a persp'ec ive of a portion of' the front panel ofy a vradio /recelvmg set,

` showing my improved rhe'ostat inpposition wfor use,

Fig. '2, is a top plan viewiof the device and va. vsection thru the-panel at theplace of attachment, FigA 3, is an under plan view of the rheostat 'l Y Fig.ljl,`is a rear elevation of the device,

Fig. ,5; is a sectionon the line 5 5 of Fig.3.""'

Referring now to -the'drawin s, A 1s a flat rheostat base of suitable insu ating matcrial, with the portion back of the supporting panel B a' section of a larger circle than the front portion. Into the center of the two circles composing the periphery of the base A is moulded' a brass lnsert a and axially threaded to receive' the pivot bolt a5 on'which the contact lever F is plvoted with the spring washer a2 to, ive therequlr'ed tension and after the bolt as'been adjusted Application :ned November 1, 1922. sriai. No. 598,383.

' tential rotarymovement of the leverv F means of the handle f cured to'themqin any .usual way', and eX- tend below the-base -A'and resistance element. C, to form stops and limit the'.rotation carries the contact; l point f1 .thru the whole arc of the element Terminal lugs E, El have wires w, w se?" of the contact lever F. The stop E is'elecf- A .I trically .connected with the contactlever F by the connector D. A singlescrew secures E, the outer end of D and one end of cito .v y the base A. Another screw secures Elsand.,

the other end of c-to A.

The top of the outer .port of thei base vA i is graduated for convenience in adjus ting! the contact lever F to a` secure amount o resistance desired.

I `claim as my invention and desire to secure Letters Patent of the United States 1 -1. A rheostat comprising an insulating base with a resistance element on one sectlon of-the periphery only and an opposite arc of said periphery thru which the handle por-l tion of a contact lever may be rotated'la conz tact lever pivotcd at or near its mid e`and having a contact point on the resistance end and an insulated handle on the other end and means -for makingtelectrical connection to the contact lever and to the resistance.

' 2. A rheostatcomprising an insulating` base with a resistance element o'n one sec v tion of the periphery only and a reading s'cale on the op osite arc of said periphery thru which the Ihandle portion of a contact lever may be rotated, a contact lever pivoted at or vnear its middle andhaving a contact point on the resistance end and an insulated handle on the other end,' a terminal lug at thefopen end of the resistance element, a connector between the Icontact lever and said terminal lug and a terminal lug at the-closed end of the resistance. s

3. A'rl1eostat comprising an insulating base with a resistance element on one section it is held securely in position by' thelloclg/of/thc zperiphery only and a reading scale nut a".

The contact leverI F extends in both directions from the pivot, without the panel to a' handle f, and within 'to make contact with. the wires c1 of the res1stance.element C,

on .the opposite arc of said periphery thru which the handle portion of a contact lever may lie-rotated, a contact lever pivoted at or on the resistance end and an insulated handle near -its middle and having a' contact point on the other end, a terminal lug at the o l n l end of the resistance element a connectorlri tween the-contactvlever and said terni al lug,I a terminal .lug at the closed end 0 1. -tglie resistance, said terminallug's dleon the other end, a connec'tor'between the oontact lever and a terminal lugr at the open end of the resistanre elemento terminal lug at the closed eiidof the resistance. said terminallngs forming clamping1r plates to secure the resistance to the bose and also stops to limit the rotation of 'said Contact levenz i 5. A; rheostnt coniprisin; Y an insulating.Y

base with an are on thereai' portion mid an` other are on the opposite front portion. thev :irc on the A:iront bein,f Y of lesser radins than that'on the rear. :t resistance element on the rear arc. n'contiiet lever pivoted substantially nt the middle of sziid huso. havingv ai wmf` tact point on the resistance end und :ininsulated handle on the outer end` :ind inezins -for making electrical connection to the conf.

tact lever and to. the resistance. c

6. A rlieostat comprising.Y nn insulating base with an are on the 'reinportion `und the arc on the front being of lesser radius another are on' the opposite front poitio1i,-

than that onuthe rear, a resistance element on the rear are, a contct lever ivoted sub. stantially :it the iniddleof said ase, having :i contact Aio'int on the resistance end and an i insulated mnd-le onthe outer end, n readf`- in;r scalp contiguous tosixid front arc, an indicator on snid handle adi'ipted to be 'used in conjunction with said scale, and means foi'A limitingelectrical connection to the conta'et lever und to the resistance.

In testimony whereof 1 have hereunto set`A my' hand. HAROLD DE vmUr'Eii'R ii

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