Патент USA US2105639код для вставки
Jan. 18, 1938. 2,105,639 L. H. DAVIS INDICATOR Filed NOV. 30, 1936 2 Sheets-Sheet l mi. _ _'72 Snuentor Gttorneg Jan. 18, 1938. L_ H_ DAV|$ 2,105,639 INDICATOR Filed Nov. 30, 1936 2 Sheets-Sheet 2 1_5 „905 5,0 Am. BU CRAFT 4.0 ' 3.0 Z5 AM'T'R Am Pouce 206° CRAFT 2.2 ' U 1.9 9M' SH ORT WAVE sT 55 2?@ P NDARD ¿ya ` 180 RoA?cAsT X926 55 man ma 12u MU £25 „904 'Hul l ¿Kaw @'25 yá, @è @55 ` 3f ‘fÃ \\ if) _' \"'\ ¿aj/f@ ó* â _? www] y ' l <3261, 5,? .l s A 5 ‘ ¿ze nnen or Y' BB Leah/'.9 Hßava'ó’, ‘ M Gttorneg 2 ' 2,105,639 tively-produced pencils of light will provide an accurate indication of the frequency to which the set is tuned. ' and means for moving said pencil of light about ' Shaft'äß (Fig. 2) extends to a suitable range change mechanism, indicated generally at 52, and carries a switch arm 54 (Fig. 6) for control ling lamps 26, 28, and 40, 42, which are con nected to switch contacts 55 and 56, by leads 58 and Bü, respectively. Current for these lamps 10 frequency-indicating pencil of light of distinc tive color upon said selected one of said scales, the said selected’scale. . 3. In multi-range radio apparatus having means for changing the frequency range of said apparatus, an opaque surface having a plurality ofk discrete, distinctively colored, translucent scales thereon, each of said scales representing may be supplied through a suitable transformer- one frequency range of ’said apparatus, means 10 62 to one terminal of which the common return wire 58 for all of the lamps is connected.Y The other terminal 60 of the secondary winding of transformer 62 is connected to the switch arm 5S, so that when shaft 50 is moved to change the responsive to the» operation of said range Vchange frequency range orvband of the receiver, arm 54 will complete the circuit to one or the other of these pairs of lamps, as determined'by the par moving said colored Vpencil of light about theV said ticular frequency range selected. . The mechanism for rotating the' tuning shaft IEI (and hence the frequency indicating pencil of light formed by lamp 40 and slit 34a or lamp 42 means for illuminating a selected one of said scales and Yfor producinga correspondingly colored frequency-indicating'pencil of light upon said selected one of said scales and means for 15 selected scale. . ' - 4. In multi-range radiol apparatus having means for changing the frequency range of said apparatus, a continuous surface constituted by a 20 plurality of scale-bearing members joined Vin cdge-to-edge relation with anrinterposed layer and slit 34e) may be of any suitable or conven of opaque material therebetween, the number of ienttype. Thus,asshown in Fig. 2, a tuning con-V rsaid discrete scale-bearing members correspond-` 25 trol shaft lil, which will be understood to extend ing to the number of separate bands to which 2.5; through the front panel of the set, and which is said apparatus may be tuned,Y means disposed supported as by a bracket 12 affixed to chassis l2, adjacent'an ledge offsaid surface forV illuminating carries a bi-part spool 14 which grips the periph a selected one of saidV scale-bearing members, ery of the disc 34 upon which lamps 40 and 42 means for producing a frequency yindicating 30 are carried. Torque applied to control shaft 10 pointer of , light upon said selected one of said 3.0 will be transferred through spool 14 and disc 34 scale-bearing members,` said. edge-illuminating to the main tuning shaft I0 which, in rotating, Y means and said’ frequency-indicating pointer be varies the frequency of the tuning element C in ing responsive to the operation 'of said range a known manner. change means, and means for moving said point The visual indication provided by the pencil er of light about said selected oneA of said scales. 35.' -35 of light Vupon the substantially rectangular scales 5. In` multi-range ¿radio apparatus `having of the drawings is quite different from that pro duced by a pointer traveling about va circular means for changing the frequency range of said apparatus, an opaque surface having a plurality scale. This difference may be attributed invpart to the fact that the axisof rotation of the point of said scale areas representing one- frequency er inVV the instant case is hidden from the ob server so that the pencil of light in its travel ap pears to “ñoat” up and across Vand down the range of said radio apparatus, aV mask in the form of adisc mounted for movement about a central axis in the rear of said opaque'surface, scale and tokchangeits length (fo-r instance, at said masks being provided with a plurality of elongated slits individual to'saidY Ascale areas, lamps individual to Vsaid slits mounted behind the corners of the rectangle) Wherever this, is necessary to completely span the surface of the scale.A ` ' said mask, means , kWhile theV invention has been described as em ` bodied in a radio receiver having but two»Y fre# quency ranges, it is to be understood that the invention is not limited to such application, asY the disclosure in this respect is merely illustra tive for the purpose of explaining the inventive concept. . f Y y What is‘claimed is: l. In l multi-range radio apparatus having means for changing the frequency range of said apparatus, a surface having a plurality of dis Í crete scales thereon, each'of said scales repre 60 of discrete translucent scale areas thereon, each senting one frequency range of'said apparatus, means responsive Yto lthe operation of said range change means for illuminating a selected one of said scales andfor producing a frequency-indi cating pencil of light upon said selected one of `Vsaid scales, andmeans formoving said pencil ofV light about the said selected scale. ï 2. In multi-range radio apparatus having means for changing'the frequency range of said apparatus, an opaquesurface having a plurality of discrete ytranslucent scales thereon', each of f1.0 4,5 connected to said `range change means for selectively illuminating said lamps whereby to project a frequency-indicat ing pencil of light upon a selected one of said 50 scale areas and means for moving said mask and hence said pencil of, light about the selected ` scale area. v 6. In Ymulti-range 4radio vapparatus having means for changing the frequency range of saidV apparatus, an opaque surface having a plurality of discrete translucent scale areas thereon, each of said scale areasV representing one~frequency range of said radio apparatus, a mask in the form of a disc mounted for movement about a central axis in the rear of Ysaid opaque surface, said mask being provided with aV plurality Vof elongated yslits 'individual to said scale areas, a second mask'mounted behind «said first-men tioned mask and for movement therewith, a plu rality of lamps mounted on said` second mask in line with said respective slits, means connected to said range change means for selectively illu minating said lamps whereby tor project a fre quency-indicating pencil of lightupon a selected said scales representing one frequency range of ` one of saidtranslucent scale areas, and means said apparatus, meansresponsive to the opera for moving said Ymasks and hence said pencil of tion of said range change means for illuminating Y light about the selected scale area. a selected one of said scales and for producing a LEWIS H. Davis.` i 5.5 '