Патент USA US2542794код для вставки
Feb. 20, 1951 R. BRENTA 2,542,793 RADIO RECEIVING SET ROBERTO BRENTA BY' www, ATTORNEY Feb. >20, 1951 2,542,793 R. BRENTA RADIO RECEIVING SET Filed May 26, 1948v 4 Sheets-Sheet 2 Haw,A49 ¿la n. INVENTOR. ROBERTO BRENTA BY ATTORNEY Feb. 20, 1951 R. BRENTA 2,542,793 I RADIO RECEIVING SET Filed May 26, 1948 4 Sheets-Sheet 3 FIG.6. >//26 50 /30 FIG. 8. í l @amV I IN VEN TOR. ROBERTO BRENTA /26 E" m Feb. 20, 1951 R. BRENTA 2,542,793 RADIO RECEIVING SEI Filed may 2e, «194s 4 Sheets-Sheet 4 nihY». if ___Ãn|„____ ____-__ OW IN VEN TOR. ROBERTO BRENTA BY ÁÍTTORNE'Y Patented Feb. 20, 1951 2,542,793 UNITED STATES PATENT OFFICE 2,542,793 RADIO RECEIVING SET Roberto Brenta, New York, N. Y., assignor of ñfty per cent to Jack Schneider and fifty per cent to Carmella Serraro Brenta, both of New York, N. Y. Application May 26, 1948, Serial No. 29,242 3 Claims. (Cl. 250-16) l This invention relates to the manufacture, con struction and maintenance `of radio receiving sets 2 manufacture, and which makes for rapid inspec and the like. .An object of the invention is to provide an _im tion and servicing of radio receivers at low cost, thereby encouraging users to have their receivers repaired rather than replacing the entire receiver proved form of radio receiving set construction whereby certain pre-determined electrical com due .to the normally high cost of repair under Íprior art construction. ponents of the set are connected into their re Other obiects and advantages of the invention spective circuits by novel `means .so that said will become apparent from the following descrip components are easily detachable v.for inspection tion of a preferred embodiment thereof as il or repair or replacement Without breaking 10 lustrated in the accompanying drawings, and in soldered connections and without the use of -tools. which, Another object of the invention is to provide an Fig. 1 is a bottom plan view of a radio receiver improved form of radio receiving set construction, chassis according to my invention, in which a number of pre-determined electrical Fig. 2 is a View similar to that of Fig. 1, but components of the set are all mounted upon a 15 with my resistor-capacitor replacement panel unitary frame, each component being connected dismounted therefrom, to individual terminals of Vsaid frame, and the Fig. 3 is a plan view of my novel resistor frame being adaptable for engagement with the capacitor replacement panel apart from the re chassis of the receiver to `automatically internose ceiver chassis, and showing the opposite side said electrical components into the electrical 20 thereof from that shown in Fig. 1, circuit thereof. Fig. 4 is a fragmentary top plan View of a radio A further obiect of the invention is to provide receiver chassis according to my invention, il a novel radio receiving set construction in which lustrating particularly the invention With relation all the resistors and capacitors of the circuit to easily rep‘aceable loud speaker and variable thereof are mounted upon a panel and perma 25 condenser units, nently connected to rindividual terminal clips on Fig. 5 is a fragmentary right side elevation as the panel, and in which mating terminal clips viewed along line 5-5 of Fig. 4, are mounted upon the receiver chassis and con Fig. 6 is an enlarged sectional view taken sub nected to the remaining circuit elements such as stantially along the line 6_6 of Fig. 4, the tubes, power supply, loud speaker and the Fig. 7 is an enlarged sectional view taken on like, whereby the panel 'bearing the said resistors line 7-1 of Fig. 1, and capacitors may be quickly snapped into elec Fig. 8 is an enlarged detail sectional view taken trical engagement with said mating ‘terminal clips on line 8--8 of Fig. 1, and to >directly interpose said elements mounted on Fig. 9 is a schematic circuit diagram of a radio the panel into the receiver circuit, and whereby, receiver embodying my invention. for service, repair or replacement, the entire said In the construction of radio receivers, it is panel may be readily unsnapped from said en customary to solder lead wires to interconnect the gagement for entire replacement, or for rapid various circuit elements, permanently to those service of individual resistors and capacitors elements, all these elements being thus perma mounted thereon. VIt() nently interconnected by soldered joints except Still another object of the invention is to pro the receiver vacuum tubes themselves. As la re víde >a novel receiver construction in which cir sult, those elements, such as resistors and capaci cuit elements such as the ‘loud speaker assembly tors, which, aside from the vacuum tubes them and the variable condenser assembly are pro vided with unitary insulated panels upon which 45 selves, are most frequently apt to give trouble, as well as the variable condensers and loud speaker, they are mounted, the circuit elements being cannot be inspected or disrnounted from the _permanently connected 'to electric terminals chassis frame Without considerable difficulty and mounted on the panels, with >corresponding annoyanceV mating terminals mounted on the receiver Consequently the cost of repair or even of chassis vfor electrical engagement therewith, and 50 inspection of a receiver to determine the location including means for securing said panels to said chassis independently Vof said terminals. of the `trouble has become quite high. By means A further object of the invention is to `provide of the present invention, it is possible to snap out a novel form of receiver construction, as de of the receiver all the trouble-giving components, scribed, which .is simple .in design, Ainexpensive to 55 either for inspection, or for replacement of the '2,542,793 3 . 4 nected to these contact rivets |36 by means of wires, as shown in Fig. 3. In Fig. 1, the rivets entire assembly, so as to eliminate the trouble, and make the receiver function immediately. In order to understand clearly the nature of the invention, and the best means for carrying it out, reference may now be had to the drawings, in which like numerals denote similar -parts throughout the several views. and rear walls 32 and 34. Mounted with rivets or otherwise upon the underside of the platform H35 themselves are clearly visible upon the under side |íi8 of the removable plate 9i); These mutually insulated Vrivets H35 thus serve to support firmly, many of the circuit elements the leads of which are soldered'thereto, in the manner of Fig. 3.- As shown best in Figs. l, 3, ’7 and 8, the removable plate 99 is also provided Yalong its edges ||0 and H2, with a number of vU-shaped spring contact lugs ||4, which are se cured to the plate by means of rivets IIS in the ' As shown, the radio receiver includes a chassis ` base 39 made of steel, aluminum or other suit able sheet material, and having depending front or base 3D, as seen best in Fig. 2, area number manner best shown in Figs. '7 and 8, so as to hold of vacuum tube sockets 38, in alignment or reg the contact lugs I I4 securely in position. istry with corresponding openings formed in the base 39 to permit insertion from above the base The contact lugs'i i4 may be conveniently nurn bered as shown in Fig. 3, from l to 20 where 20 such lugs are used. It will be seen, from Fig. 3, 3|! of vacuum tubes 38 through the openings and Y into the tube sockets in the usual manner. _ that some of the circuit elements, such as the oscillator coil 'lil and the electrolytic condenser underside of the chassis platform 3|) in >registri’ 20 88 have one or more of their terminals >soldered or otherwise connected directly to certain of the with openings formed therein, to permit insertion marginal contact lugs ||4 which thus serve to from above the base 3|! of the contact prongs or provide direct support for them on the plate 90. plugs of hollow cans 42 containing tuning coils Coil sockets 49 are similarly secured to the As shown best inrFig. l, it will be seen that and trimmer condensers into said coil sockets. The cans 42 are well known in the art and hence 25 further interconnection between any selected will not be otherwise described in detail, except contact rivets ¿§96 and/or any selected marginal to mention that they form shields about the en closed coils and trimmer condensers, and are em lugs H4, may be made by means of wires |213 on the reverse side ,of the plate 99. In this manner, ployed for various purposes in the radio circuits, any desired degree of circuit element intercon such as intermediate freouency transformers and 30 nection may be accomplished. , the like. 4S! are connected into the radio circuit by means of Yinsulated wires 44 so that the various circuits are made continuous in the manner well knownY in the art. ' The contact lugs ||4 on the plate 90 are adapt The tube sockets 36 and the coil sockets " ed by location along the margins of the plate . Fig. 9 shows a typical superheterodyne radio receiver circuit including tubes and power supply adapted for connection to the electric power lines by means of wires 46 and 48. A combined line switch and potentiometer type volume control 59 40 9U, for conductive engagement with iiexible spring clips or sockets |22 which correspond in number and position to the contact lugs H4. However, the stationary spring clips S22 are car ried upon two parallel strips |24 and |26 of in sulating material extending almost the full length from left to right of the'chassis 30 as seen in Figs. 1 and 2 to underlie the marginal edges-of the removable plate 90. Each of these insulat is supported upon the front chassis wall 32 with its shaft 52 extending through an opening formed ing strips |24 and |26 is secured to the under side of the chassis platform 30 by means ofi."V in the wall and is secured in position by means shaped brackets |28 secured to the parts by means of a nut 54 threaded onto the outer end of the shaft bushing 59. The electrical connections of 45 of screws or rivets |30 and |32.> From Figs. 1 and 2, 7 and 8, it will be seen that the brackets the switch and volume control 5|! are shown in |28 are only secured to the insulatingr strips |24 the schematic diagram of Fig. 9, at two locations and |25 at their ends, so there is no direct con marked 5G, and it is connected into the circuit nection through this means between the chassis by means of insulated wires such as those shown 50 30 and any of the spring socket clips |22. at 58. , The brackets |_28..may be of steel, whereas the An antenna loop 60, comprising a number of shanks |34 of the spring socket clips |22 are of turns of wire wound on a fibre form, is sup resilient material such as spring steel or brass ported upon a loop bracket 52 secured to the or copper alloy, so as to yield readily to their rearward chassis wall 34 by means of screws 64, the loop being connected into the circuit by means 55 dotted line positions shown at |36 in Fig. 7, when the plate lugs . | |4 are snapped into posi of wires such as those shown at S6 and 68 in the tion as shown, each opposite pair of plate lugs manner shown in Fig. 9. From examination of H4 being thus snapped into engagement with the the schematic circuit diagram in Fig. 9, it will be seen that there are numerous other circuit ele corresponding pair of oppositev socket clips I 22, ments and components, such as oscillator coil 1li, 60 so that the plate Sû is securely held in position. In this manner, not only is the plate 90 sup ñxed capacitors '12, '14, `'16, 18, 80, 82, 84, 86 and ported ñrmly as illustrated, but each plate lug electrolytic capacitor 88. These are mounted ||4 on the plate Sil is in electrical connection upon one surface 89 of a removable plate or plat with its mating socket clip |22 on the insulating form et formed of insulating sheet material. Also mounted on the same surface of the re movable plate 96 are other circuit elements, such as the ñxed resistors 92,512,234, 96, 98, HiB-and |32. In View of its greater bulk, the dry type electro vlytic condenser 38 is set into an opening |94 formed through the plate 9U, so as to avoid undue 0 extension thereof in either direction. A number of contact rivets |96 are permanently set into two longitudinal parallel rows of holders formed through the plate 90, and some of the circuit elements such as resistors and capacitors are 90n 75 strips |24 and |26. Since the stationary socket clips |22 are connected by means of wires such as those shown at |40 in Fig. 2, to various of the radio circuit elements in accordance with the cir. cuit diagram of Fig. 9, it is obvious that quick connection and> disconnection of the circuit com ponents mounted on the plate 90 with the other circuit components mounted on the chassis is easily effected by merely snapping the movable plate 90 into position or unsnapping it from en“ gagement with the stationary socket clips |22. 235495198 5 By this simple means, therefore, :it is apparent that »those circuit elements usually most prone to trouble, that the resistors, Lcapacitors _and oscillator coil, are Aall ,mounted on a single in sulated plate for removal at any time for in spection. And this may be accomplished with out use of any Atools Vor the like, and Without 6 »departing from the spirit and scope vof the in vention. I claim: l. A radio receiver comprising -a plurality of radio circuit elements, a chassis, some of said radio circuit elements being mounted on said chassis, a secondary support plate, means for supporting said secondary support plate upon breaking any soldered connections. Similarly, if said chassis so as to be readily engageable and trouble exists, the entire plate 90 with the ele ments mounted thereon, may be Yreplaced to cure 10 disengageable therewith, some other of said radio circuit elements being mounted on said secondary the trouble, at low cost, it being ‘sometimes support plate, means carried jointly by said chas cheaper to replace the entire plate 90 than to test ;sis and -said secondary 4support plate yfor eiîect individual elements of a conventional type set ing ready electrical connection and disconnection to determine the trouble. According to the invention, other main circuit 15 of the circuit elements carried on said plate with the rest of the circuit, said secondary support components may also be replaced without trouble. plate being adapted to overlie a portion of the Such elements may be the loudspeaker assem bly including the loudspeaker |50 and matching receiver chassis, a plurality of iixed main con tact lugs secured to said secondary support plate transformer |52, shown in Figs. 4 and 6. The magnetic yoke frame |54 of the loudspeaker has 20 and interconnected individually with selected secured to its underside by means of rivets |56, numbers of said circuit elements carried on said an insulating terminal strip or plate |58 having secondary support plate, a plurality of mating lugs |60 secured thereto and mutually insulated. contact sockets carried by and insulated from The terminals of the matching transformer and said chassis, and adapted to engage with said the voice coil of the loudspeaker are connected 25 corresponding main contact lugs to effect elec by wires |62 to these lugs |60. trical interconnection therewith, said mating con A similar insulating strip or plate |64 is se tact sockets beine electrically interconnected with cured by rivets |66 to the chassis platform 30 as the circuit elements on said chassis according to seen in Fig. 6. and has mounted thereon four the schematic hookup of the particular radio re stationary socket spring clips |68 by means of 30 ceiver, whereby quick and easy connection and rivets or the like, «in positions corresponding to disconnection of the circuit elements on the plate the movable lugs |60 on the other plate when placed against each other, so as to make con may be effected. tact `with the mating lugs and clips to complete acterized further in that said chassis carries se cured thereto a plurality of insulated strips, said mating contact sockets being secured to said in sulated strips and interconnected with said elec trical circuit of the radio receivery and said ñxed the circuits to the loudspeaker. To hold the fixed and movable insulating plates |58 and |64 Y in mating engagement with their corresponding electrical contacts interconnected, I prefer to em ploy one or more screws or bolts |10 extending through aligned openings in the insulating plates and/or the abutting metal parts, as in Fig. 6. In a similar manner, as shown best in Figs. 4 2. The construction according to claim l, char main contact lugs on the said plate are con 40 structed and arranged for good electrical connec tion with their said mating contact sockets. 3. A radio receiver comprising a plurality of and 5, the variable tuning condensers |12 may radio circuit elements, a chassis, some of said also be mounted for ready removal from the cir~ radio circuit elements being mounted on said cuit. Thus, the frames |14 of the condensers 45 chassis, a secondary support plate, means for sup porting said secondary support plate upon said have secured to their undersides by rivets or chassis so as to be readily engageable and dis otherwise, insulating plates |16 carrying termi engageable therewith, some other of said radio nals |18 and |80 connected to the condensers by wires |82. Matching insulating plates |84 are circuit elements being mounted on said secondary secured. to the upper surface of the chassis plat 50 support plate, and means carried jointly by said chassis and said secondary support plate for ef form 30 by rivets or otherwise, and have socket îecting ready electrical connection and discon clips |86 carried thereon and interconnected with nection of the circuit elements carried on said the receiver circuit by means of wires |88. plate with the rest of the circuit, said secondary Grounding is effected by direct connection to the support plate being adapted to overlie a portion of chassis by means of the screws |90 extending bethe receiver chassis, a plurality oí ñxed main con tween the chassis platform and the condenser frame, and holding the condenser in position, with its contacts |18 and |80 in electrical con tact lugs secured to said secondary support plate and. interconnected individually with selected nection with the corresponding mating station members of circuit elements carried on said CL) secondary support plate, a plurality of mating ary contacts on the plate |84. contact sockets carried by and insulated from said In this both the loudspeaker and the chassis, and adapted to engage with said corre variable condensers may he readily connected or sponding main contact lugs to eiîect electrical in disconnected without breaking any soldered con terconnection therewith, said mating contact nections, either for inspection and repair, or for replacement. sockets being electrically interconnected with the It is thus apparent that I have devised a type of radio receiver construction which is quite simple for both connection and disconnection of the more important circuit elements. Hence servic ing of the radio receiver is possible at low cost and circuit elements on said chassis according to the schematic hookup of the particular radio re ceiver', whereby quick and easy connection and disconnection of the circuit elements on the plate without delay. may be effected, said chassis having secured thereto a plurality of brackets, at least one insu lating strip secured to at least one of said brack ets, a plurality of mating contact sockets secured to each of said insulating strips and in position size, shape, materials and arrangement without 75 to mate with one of said main contact lugs on the Although I have described a preferred embodi ment of my invention in speciiic terms, it is to be understood that various chances may be ma de in 2,542,793 7 „ >said secondary support plate to effect electrical connection therewith, whereby said secondary support plate may be quickly and easily engaged 8 UNITED STATES PATENTS Number 2,268,619 Name Date Reid ______________ __ June 6, 1942 with and disengaged from the said receiver chas sis, and simultaneously eiïecting electrical en 5 gagement or disengagement of the electric circuit Number FOREIGN PATENTS Country components carried by said secondary support Great Britain ____ __ June 29, 1925 plate from and with the radio receiver elements carried by said chassis. ROBERTO BRENTA. REFERENCES CITED The following references are of record 1n the ñle of this patent: ’ 236,261 Date OTHER REFERENCES Tele-Tech Magazine, October 1947, article en titled: “Here’s the all plug-in receiver,” page 57.