Nom âgé-5. s. H. M. DODINGTON RADIO AS SEMBLY Filed Dec. ll, 1943 3 Sheets-Sheet 2 ' . ¿/’ í/Ä ATToRNEy Nov. 26, 1946. s. H. MDODINGTON 2,411,528 RADIO ASSEMBLY v Filed Deo. lll, 1943 | l ìï. f@ E E, n ~ Sb 3 Sheets-Sheet 3 Patented Nov. 26, 1946 2,411,528 UNITED STATES PATENT OFFICE 2,411,528 RADIO ASSEMBLY Sven H. M. Dodington, Forest Hills, N. Y., as signer to Federal Telephone and Radio Cor poration, New York, N. Y., a corporation of Delaware Application December 11, 1943, Serial No. 513,965 3 Claims. (Cl. Z50-16) 1 2 The present invention relates to radio assem blies anel more particularly to an assembly of parts forming a radio transmitter, receiver or vide means whereby any portion of a radio as other similar apparatus. It is highly desirable in manufacturing radio equipment to make the assembly as compact as sembly may be quickly and easily reached for in spection or repair. Other objects and advantages of the inven tion will be apparent from the following detailed description to be read in conjunction with the possible. In fact there are numerous occasions accompanying drawings, in which: upon which the overall dimensions of the equip Fig. 1 is a perspective view of a radio assembly ment are strictly limited, as for example, on in accordance with the present invention; board airplanes or other Vehicles in which space l0 Fig. 1A is a sectional View of a portion of Fig. 1 is usually at a premium. However, these space along the line indicated; limitations, in making compactness a requisite, Fig. 2 is a View of Fig. l showing several of the raise a number of problems that require solution. sub-chassis members separated from the as These include (1) the design oi the assembly so that the various units are physically segregated in accordance with functional characteristics, for sembly; example, respective parts of the detector, ampli Fig. 1; iier, power unit, etc. being grouped together; Fig. 3 is a perspective view of a plug and socket assembly designed for use with the structure of Fig- 4 is a perspective view of a modification of (2) overcoming the undesirable crowding of parts Fig. 1 with the radio parts arranged to provide and wiring resulting from the desire for com 20 for greater compactness; and pactness; (3) ease and speed of assembly; (4) Fig. 5 is a rear elevational view of a modifica accessibility for prompt inspection and repair. tion of the structure of Fig. 4 showing hinged Other problems may be raised in specific in sub-chassis members. stances but the ones mentioned will serve as a In Figs. l and 2 are shown a plurality of sub broad illustration of the factors involved. in conventional practice, a single chassis is chassis members 8, iii, l2, I4 and I6. These sub chassis members are preferably made of sheet usually employed for large assembly jobs such as metal by known cutting and stamping operations. a transmitter or receiver. Each member comprises a rectangular panel having its edges flanged, as generally shown at rI‘his procedure is cumbersome and time consuming to the factory workers because of the diiñculty involved in as sembling and wiring thereon numerous parts in compact arrangement. In addition to the diffi culty of assembling the parts, the compaotness o-f the assembly permits but one or possibly two per 8A, HBA, iÉA, iíiA and lEA, these side iianges acting to stiffer. the panels and also to provide a space in which small parts and wiring may be disposed and shielded, as will be hereinafter brought out. The side flanges of several of the panels are secured together at the corners of the sons to work on it at a time. Furthermore, such panel by some preferred means such as welding, compact assembly jobs render it exceedingly dif this construction acting to add rigidity to the ncult to repair and/or replace parts, since to re move a particular member for repair or replace structure. ment, other parts and wiring must usually be On both the top and bottom surfaces of sev 40 eral of the panels il, il), l2, I4 and IS are mounted disturbed. radio parts and wiring, generally indicated as I8 Accordingly the present invention has as one in the drawings, to form a number of sub of its principal objects the provision of a radio assemblies. The sub-assembly on sub-chassis 8 assembly in which each of the above-mentioned may comprise, for example, a pulse amplifier, problems has been solved. while the sub-assembly on sub-chassis IEI may Another object of the invention is substantially similarly comprise an intermediate frequency to increase the amount of space available for amplifier'. The functional radio parts shown, as mounting the parts and equipment on a radio well as their number and grouping, is merely chassis the overall dimensions of which fall given by way of illustration, as obviously other within predetermined limits. A further object of the invention is to provide 50 circuit units would necessitate other equipment. ln general, however, it may be said that the tubes, a chassis construction by which radio equipment coils, transformers and other large radio parts may be conveniently assembled in sub-assemblies are preferably mounted on the top surface of the according to function, and the sub-assemblies sub-chassis members, while the smaller parts then mounted together. such as resistors, condensers and wiring are dis y A still further object of the invention is to pro 2,411,528 3 posed on the bottom surface. 4 The bottom sur face oi the sub-chassis members may be either side'of these members, but, as illustrated in the drawings, I refer to the portion of the member lying bet Jeen the side iianges as the bottom surface. The above arrangement of parts is particu similar to that described to both members I2 and I 6. In order to provide means for grasping the as sembly or carrying it from place to place, a pair of handles 22 are provided. These handles 22 each have a pair of threaded openings 42 in the portions thereof adjacent the panel l ‘5. This can larly true oi the side sub-chassis members 8 and best be seen by reference to Fig. 1A. A pair of lil. On the other hand, member Hi has been screws dii are respectively receivable in the two illustrated as comprising a power unit, the par 10 side openings IDB, and these screws project ticular requirements of which necessitate placing through side openings 16B and into the threaded certain oi the parts outside the enclosure formed openings 132 in handle 22. By means of this con by the members. However, this condition existsl struction it will be seen that the handles 22 serve only for this type of unit, and for other circuit a double purpose, that is, they provide means for portions the larger apparatus included therein 15 conveniently grasping the assembly and in addi could be grouped on the inner surface of the tion they provide means for additionally securing sub-chassis lêl in a manner similar to that of the together the sub-chassis members 8, lli and i6. members S lo. The sub-assembly on sub Sub-chassis member lll is provided with two chassis i5 comprises the control means for the series or” bolts 223, as best shown in Fig. 2. One assembly, these control means being generally 20 series of bolts 2d is aligned with openings EEC in indicated at ‘Eil in the drawings. flange lûA of member lû, and the other series As above stated, the sub-assemblies may com of bolts 2d is associated with three openings (not prise certain deíinite stages of the radio appara shown) in ñange 8A. Thus sub-chassis lll can tus, such as a detector stage, ampliiier, etc., or be brought up to the other members so that bolts may comprise any radio parts that may be most 25 2li project through openings I @C and the cor readily and conveniently associated together as responding openings in flange 8A. Nuts 29 (Fig. a unit. Each of these units or sub-assemblies l) threadably engaging these bolts tend to se may be assembled as hereinbefore stated by a dif cure rigidly together members 8, Ill and lli. ferent workman. It will thus be seen that the whole assembly is .A description will now be given. of the prin 30 now rigidly joined together as a unit. However, ciple of assembling the sub-chassis members, it will be clear that by removing the necessary each of which has been provided, as above men tioned, with radio parts and wiring as a sub-as bolts or screws, any one of the sub-assemblies can sembly. The required sub-assemblies which, in be separated from the remaining units for in spection or repair. In the embodiment of the the present instance, are five in number, are po sitioned in spaced-apart angular relationship as employed to strengthen the assembly against invention shown, a pair of cross braces 6o are best shown for several of the members in Fig, 2. twisting or distortion. Sub-chassis member l2 is preferably disposed to As hereinbefore stated, the larger parts and lie in a substantially horizontal plane. Sub circuit elements are positioned on the top sur ohassis members S, lll, i4'. and IS are disposed in 40 face of the sub-chassis members. Thus, as substantially vertical position adjacent the re shown in Figs. l and 2, these elements such as spective flanged edges IEA of the member l2. tubes I8' project inwardly toward the center of Although five sub-chassis -members have been the box-like structure constituting the assembly illustrated, it will be clear that either or both so as to substantially ñll the enclosure. How members i2 and la may be dispensed with, and 45 ever, it is intended that the sub-chassis members also that another sub-chassis member, parallel M and IS be of suiiicient width so that a space to member l2, may be provided to form a com will exist between the inwardly-projecting radio pletely enclosed boX-like structure. parts of the sub-assemblies mounted on sub Each sub-chassis member is provided with chassis members 8 and le. This is brought out means for securing it in rigid relationship to its 50 in Fig. 1, in which a space exists between the two adjoining sub-chassis members. This is accom rows of tubes, thus permitting access to the lower plished in the embodiment shown by a plurality part of the interior of the structure. No radio of screws and bolts respectively receivable in a parts have been illustrated as being mounted on plurality of openings formed in adjoining mem sub-chassis member l2 in Figs. 1 and 2, but this bers. For instance in Fig. 2 the sub-chassis 55 is solely because the particular- circuit illustrated member lli is provided with a plurality ofvopen in these figures does not require further parts in ings in the flanges thereoi designated as lilB and addition to those mounted on the remaining llìC. In the panel portion of the member a series members. However, it will be clearly understood or" openings lill) are formed. ‘ that if additional circuit portions are necessary, `Still referring to this sub-chassis member lll, 60 the sub-chassis member l2 may be equipped with it will be seen that when this member is brought such parts in a manner similar to that described into close relationship with the sub-chassis mem for sub-chassis members 8 and l0. ber l2, the openings lllD in member lil will line The spaces formed by the flanged portions 3A up with the openings l2D in the flanged portion and ISA respectively of sub-chassis members il l2A. It will also be seen that openings ESB in 65 and lll, including the lower surface of -the panel the flanged portion H3A will line up with a series portions of such members are designed to enclose of openings ESB which are provided in the panel the smaller radio parts and wiring, including portion of sub-chassis member Iii. A plurality of those elements which in radio constructions are bolts 2li (Fig. l) are passed through openings normally electrically connected or joined together lllD and i213 to secure the panel portion of mem 70 by soldering or other similar means. Thus a ber lil to the ‘flanged portion IZA of member I 2. majority or" such connections in the subèassem A bolt 2l similarly passes through the center blies S, lli l2 accessible from the exterior opening lilB into the center opening 15B of mem repaired of the assembly, without the can necessity readilyofberemoving inspectedany ber it to secure the iiange H3A to the panel I6. Sub-chassis member 8 is secured in a manner 75 of the screws or in any other way separating the 2,411,528 5 various sub-chassis members themselves. 6 As supported by member 32 are a plurality of plugs hereinbefore stated, due to the nature of the power E@ designed for respective engagement with the unit illustrated as constituting sub-chassis mem sockets 28 of support 2t. When the sub-chassis member ill is brought against sub-chassis mem ber l2, as hereinbefore described, the plugs and ber lâ many of the larger parts of this sub» assembly have been illustrated as extending out wardly from the panel itself instead of inwardly as is the case with the other chassis members just described. However, as before stated, this is en tirely due to the nature oi this particular circuit portion, and other circumstances the structure shown in l and 2 readily be changed to have these elements extend toward the interior of the assembly. Sub-chassis member i3 comprises the control portion of the assembly. The various dials and other control elements, generally indicated at 2d. must, of necessiti , be mounted so as to be capable of actuation from the exterior of the unit, For this reason any circuit connections between the controls will be on the interior surface of member l5. However, such circuit connections are readily accessible through. the opening formed by the various vertical sub-assemblies. t has been stated that each of the sub-assem blies is wired as a unit. Therefore, only one cable or other connection is necessary between the sockets will become respectively associated so as to establish any desired connections between these two sub-chassis members. Of course, similar plug socket connections can be provided between sub-chassis members 3 and l2, le. and l2 and lil and i2. Thus no wiring oi any sort will be neces sary when the various sub-chassis members are assembled to form the complete structure. In Fig. 4 is shown alternative construction by which the width of the total assembly can be considerably diminished. This is accomplished by vertically oîsetting the larger radio parts, such tubes l-AEA and ltlB, so that they lie in planes one above the other. Oppositely disposed to each such plane of tubes or other apparatus are two series or” openings M- and ¿lâ respectively cut out of members 3 and le. Thus when the sub-chassis members S and l5 are brought together, these openings all and permit access to be had to the radio parts lâh and E3B so that replacement or repair thereof can be made through these side various submassemblies when the complete unit openings in the assembly rather than through the is assembled. One example of such a connec~ tion between the sub-assemblies is shown in Fig. ll in which a cable ¿5S is shown extending from an top as was the case in the structure of Figs. l and 2 and at the same time permit proper ventila opening in subchassis I/i to each of the sub-chassis members 8 and lll through an opening in the panel portion of the latter below the line to which the flanged portion lZA is attached. In Fig. 2 an opening lilE in member lil is shown to receive this cable. le. similar opening exists in panel S1. Further circuit connections may be made between the sub-chassis member l5 and one or more tion. Due to the oíiset position or" the parts IBA and lSB the two members 8 and l0 can be placed much closer together than would otherwise be the case. Ir” desired, the openings 44 and/or ¿l'e‘ can be formed as one large opening rather than several small ones. In Fig. 5 is shown an alternative form of con struction in which the sub-chassis members 8 and of the other sub-assemblies depending on the type lll are hinged on the sub-chassis member l2 so that such members il and it can be lowered into of circuit employed. Due to the fact that considerable heat is gen parallel relationship with member I2 by rotation radio apparatus now mounted on sub-chassis t will be readily apparent from the foregoing description that my invention makes it possible about the hinges Eil. In this construction a U erated as the result of tube operation and from shaped opening 52 is provided in flanged portion other circuit elements in most radio apparatus, . . to replace the upper opening H2B, and also a a plurality of openings 62 are provided in members small portion is cut out of the surface of member S and lll so as to provide adequate ventilation for 45 lil adjacent thereto. Similar changes are made the interior of the assembly. in member Thus by merely loosening one of It is apparent that a structure such as has been the screws lili, and without completely withdraw described is usually well suited for use for circuits ing such screw from the opening 42 of handle 22, which ray tube is utilized. It will be the sub-chassis members 3 and Hl can be selec clear that such a cathode ray tube (not shovm) 50 tively lowered to any angular position relative to can be within assembly so that the sub-chassis member l2, thereby permitting ready screen the tube will be positioned approxi. access to the interior of the assembly. If desired, rnately at the point new occupied by dial ‘is of the screws ‘le of Fig. 1A can be replaced by a member conical body of the tube will pair of wing nuts 5s as shown in Fig. 5 to permit 55 easier operation or the securing means. then sembly. extend or in centrally other words toward toward themember rear of the The members and would surround this cathode to ass noble and wire the numerous parts of a ray tube, so that practically all the space within radio transmitter, receiver, or other radio appa the interior of the assembly would be utilized. ratus, in sub-assemblies and to combine these In Fig. 3 is shown a modification of the struc sub-assemblies into a single unit. By this method ture of Figs. 1 2 in which any necessary con of assembling radio parts a large number of op nections between the sub-chassis members are era-tors may work on a single apparatus, one or automatically made when such units are joined more workers assembling the parts of each ~sub together. This is accomplished by means of a 65 assembly. rl’his method also facilitates mass pro number of plug and socket elements. On sub duction of radio apparatus and insures better chassis member l2 is secured. .a support 25, this workmanship for compact devices, since the cum support being rigidly held against the under bersorneness of numerous parts closely associated is largely avoided. Besides facilitating the man screws 3S. Within and positioned by support 2E 70 uiacture oi this type of compact apparatus, my are a plurality of sockets 23. Support is re invention enables the removal of sections of the cessed as shown from the flanged portion l 2A. apparatus for repair and replacement purposes On the surface of sub-chassis member lli is posi without disturbing adjacent parts other than dis tioned another support 32 secured to the member connecting the single cable or other connection by means or a plurality of screws 38. Within and 75 to the section the removal of which is desired. In surface o1" the member by means of a plurality of 2,411,528 7 3 the plug and socket modiñcation shown even this latter step isl unnecessary. It is apparent that the increase in surface availabie for mounting the parts varies with the in the objects of my invention, and. the accom panying claims. I claim: _ ' ~ 1. A radio assembly chassis in the form of a number of sub-chassis members utilized, this number being normally between three and six. including a bottom wall, said bottom Wall and a if the members are of the same dimensions, three plurality of said side Walls each comprising a flat, box like structure, having side and other` Walls sub-chassis members together will provide about ñanged, rectangular sub-chassis member, means 150%v more available space than a conventional including the flanges for securing said members 10 having an area equal to one of the members. together with the spaces included by the iianges additional sub-chassis member employed, of facing outward, radio parts mounted on the in course, adds to this total. side face of said members and radio parts and It will also be seen that due to the upright na wiring mounted on the outside thereof Within ture of a majority of the sub-chassis members, it said iiange spaces, all said radio parts and wir is possible to change the Wiring connections or re 15 ing mounted on each said sub-chassis members move any of the parts mounted on such members Without turning the assembly on its side as would constituting a substantially complete circuit unit. 2. An assembly chassis according to claim 1 in be the case with conventional units that are which ons wall of the box is constituted by a con mounted on a horizontal base. This eliminates any possibility of breakage or other damage to the apparatus that might occur when the assem trol panel and there is means for securing ñanged portions or adjacent sub-channel members to said bly is turned from its normal position. While I have described above the principles of my invention in connection with speciiic ap paratus, and particular modiñcations thereof, it is to be clearly understood that this description made oniy by way of example and not as a lim itation on the scope of my invention as set forth panel. 3. An assembly chassis according to claim 1 wherein one wall of the box is constituted by a control panel and the side sub-chassis members adjacent to said panel are pivotally mounted to the bottom wall member and means is provided for locking them in ciosed position. SVEN H. M. DODINGTON.