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Патент USA US2542794

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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
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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
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IN VEN TOR.
ROBERTO BRENTA
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Feb. 20, 1951
R. BRENTA
2,542,793
RADIO RECEIVING SEI
Filed may 2e, «194s
4 Sheets-Sheet 4
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___Ãn|„____ ____-__
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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.
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