Патент USA US2133789код для вставки
Oct. 18, 1938. 2,133,789 E. J. Pool. METAL CONTAINER FOR RADIO SETS Filed March 30, 1935 ' c ‘5' /e ‘l’ [111111111111111 6L» ‘2 .IW/7202117022: Essoîî/JPOOZ, @MW Patented Oct. 18, i938 2,133,189 UNITED' STATES l PATENT OFFICE 2,133,189 METAL CONTAINER FOB, RADIO SETS ' Esson J. Pool. Chicago, Ill., assignor to Cinch Manufacturing Corporation, Chicago, lll., aY corporation of Illinois ,Application March 30, 1935, Serial No. 13,915 1 claim; "(el. zzo-5s) My invention aims to provide improvements‘in 'sufficient tension in the finger to enable it to bear fastener means for securing a cover to radio boxes and the like/ structures. » firmly against the wall of the box whereby suit able electrical wiping contact may be had 'at all times between the box and the cover, and, at the , In the drawing which illustrates preferred I forms of my inventiont- i same time, cause the cover to be pressed firmly Figure l is a plan view of a metal radio set con against the walls of the box, thereby securely at tainer with cover attached; Fig. 2 is a section taken on the line 2-2 of F18- 1: - . taching it to the box. " Referring now to the drawing, I have shown in i Figure 1 a metal box or cabinet having a cover I and a container 2. The fastener member itself may takeseveral forms, one of which is shown in ` Fig. 3 is a section taken on the line l-l'of Fig. 2; Fig. 4 is a section taken on the line 4-4 of Fig. 2. There, I have provided a member made in strip form, preferably of cold rolled steel, hav Fig. 5 is a section showing another form of my `ring a base portion 3 which is substantially fiat Fig. 2: invention; ’ Fig. 6 is a section taken on the line 6-8 of Fig. 5: ' Fig. '1 is a section taken on the line 1-1 of Fig. 5; and A and secured to the inner surface of the cover 2 by l5 means oi’ the rivets l, although I would prefer that this attachment be by spot-welding, as shown in Fig. 6. ‘ ~ Preferably the fastener member has a number Fig. 8 is a section of a fastener member per se Aof spring fingers 5 extending downwardly and taken from the side. f My invention relates especially to a metal box and cover installation for housing an automobile 25 radio set and the like. It is well known that an automobile radio set. vin orderl toobtain clear radio performance, must becompletely shielded from all outside interfer outwardly from' the base 3. The member 5 has a shoulder portion 6 for the purpose of bearing upon the interior of the box side walls 1 thereby pressing the ñange I of the cover 2 firmly against the walls 1. ` - I have provided at the same time, as shown in Fig. 2, a'spring finger 9 attached to the same base portion 3 as the finger i but having a more pro ences. One method is to install the set in a metal box which is thoroughly grounded to the automo- ' nounced shoulder' formation II) than the finger 5, 30 bile body. This metal box, together with a de the purpose ofwhich is to engage with a shoulder tachable cover, must be of good conductive metal material in order that there be a complete grounding means surrounding the set while the cover is on the box. I have provided in my in 35 vention, a fastening means for securely attaching the cover to the box and which will, at the same time, provide a good electrical wiping contact be l tween the cover and the box. ' I have taken as a preferred embodiment of my 40 invention, although I do not wish to be limited thereby, a fastener member made of cold rolled steel material. I prefer this untempered mate-` rial because, among other things, it is more adaptable to be spot-welded to a supporting struc \ 45 ture, such as a radio cabinet cover, than a high carbon tempered steel. By spot-welding my fastener member,. I am enabled to secure it more quickly to a support, than would be the case if the ' fastener were attached by ordinary riveting 50 means, and it is notnecessary to have alignment of the holes in the fastener means with the holes f in the supporting structure. portion I I bent from the side Wall 1, as is shown in Fig. 4. \ ` These fastener strips may be of any length and comprise any combination of the two finger types as may be desired. When the cover is placed in position on the box and forced down, the wall 1 of the box engages the fingers 5, which are slanted toward the sidewall, and forces thershoulders 6 away from the flange 8, thereby forcing the wall 1 against the flange 8. When Ythe cover is com 40 pletely closed the bent-in shoulder portion II of y the side wall engages the shoulder portion I0 of the spring finger 9 and the cover is thus securely fastened in place. 'I'he spring fingers are provided with a rib shaped portion I2 (Fig. 8) for the purpose of stifiening the untempered steel so that 'suitable spring tension may be maintained for the pur- ' poses described. ' In Figs. 5, 6 and 7, I have shown a pin I3 pro jecting from the side wall 1 and providing a means vi‘or resting the ñanges 8 of the cover 2. 'I'his pin, I have provided a rib-shaped formation on each or some other suitable means providing a shoul . of the spring fingers of the fastener member for , der, is necessary when a curved plane is formed 55 the purpose of stiffening the spring ?nger to cause by the extension of the cover base to form the 2 2,133,789 ' cover ñanges as shown in Figs. 6 and 7, but the ornamenting surface, fastening means for secur pin or shoulder is usually unnecessary when the ' ing the cover to the box comprising strips of un cover ñange extends at right angles to the cover i tempered steel of substantial length relative to base, as shown in Figs. 3 and 4. In this construc tion I have eliminated the rivets 4 of the previ ously described construction to carry out my idea of spot-welding the fasteners in place instead of other more expensive and slower methods. Spot-Welding- the fasteners to the boxes is par 10 ticularly important when it is desired to apply baked enamel to the outer surface. It is desir lus the length of the respective side walls, spot Welded yto the inner surface of one of said portions with no part thereof extending beyond the outer sur face of such portion to present projections which would impair said ornamenting surface, each of said fastening means being provided with a series of vindependently acting ñngers bearing against the'other portion of said box under spring tension able to have a neat i'lnish to the box and this can be accomplished when the fasteners are spot to hold it in tight electrical contact with a coop welded better than when riveted. box cooperate -to shield a radio set contained . While I have illustrated and described preferred forms of my invention, I do not wish to be limited thereby, asthe scope of my invention is best de >iìned by the following- claim. I claim; In combination, a metal automobile radio box 20 vhaving a body portion with upstanding side walls, a cover portion for said box adapted to receive an erating box portion whereby the portions of the therein, and said fingers being formed with an olîset rib pressed therein adjacent to the point of attachment of the fastening means to lthe box portion to stiiTen said fingers to increase the bear ing tension of the fingers against the cooperating box portions. ' l p ESSON J. POOL.