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Патент USA US3054094

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Sept. 11, 1962
J. R. AYMAR
3,054,083
ELECTRICAL CONTACT DEVICES
Filed Sept. 24, 1957
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INVENTOR
22
JULIAN ROBERT AYMAR
BY
ATTORNEYS
ite brats
tent
$354,083
Patented Sept. 11, 19624
i
2
3,054,083
In this device, a spring-type or banana plug may be in
serted within the bore of the contact or barrel insert. The
full-round sleeve of the insert maintains a constant, per
ELECTRICAL (IQNTACT DEVICES
Julian Robert Ayniar, 2018 E. 67th St, Brooklyn 34, N.Y.
Filed Sept. 24, 1957, Ser. No. 685,962
1 Claim. (Cl. 339-413)
This invention relates to a contact device and refers,
more particularly, to an electrical contact device, where
in a receptacle arranged for receiving a plug to complete
an electrical circuit connection is maintained within an
insulating housing device.
Practical experience has shown that faulty electrical
connections are ofttimes traced to the structural features
manent contact between its contiguously disposed walls
and the plug.
It will become apparent from this construction that the
constricted ring portion near one end of the insert is cor—
respondingly engaged by an aligned ring portion of the
recessed end type of barrel which coincides structurally to
the contours of its respective insert.
With the above and other objects in view, which will
appear as the description proceeds, this invention resides
in the novel construction substantially as hereinafter de
scribed and more particularly defined by the appended
of the receptacle or jack itself. Although the electrical
circuit leads may be ?rmly soldered to their respective 15 claim, it beinrr understood that such changes in the precise
connections, the contact between the plug and bore of the
embodiment of the herein disclosed invention may be
receptacle had been found to be loose and insecure.
made as come within the scope of the claim.
Numerous attempts have been made to design expedients
A fuller understanding of the present invention may
so as to provide for a more proper and effective contact.
be had by referring to the ‘following description taken in
However, all said prior attempts did not yield a thor 20 conjunction with the accompanying drawing, showing
oughly satisfactory solution of this problem.
by way of example a preferred embodiment of the in
It is an object, therefore, of the present invention to
ventive idea.
provide a greater degree of effectiveness in the electrical
The accompanying drawing illustrates an example of
contact made between a plug and jack.
the physical embodiment of the invention and the best
Another object is to provide greater durability in a 25 mode so far devised for the practical application of the
novel structural contact device constituting the receptacle
principles thereof ‘and in which:
and insulating housing device of the present invention.
FIGURE 1 is a longitudinal sectional view of the
Yet another object of the present invention resides in
non-conducting housing of the present invention.
the provision of means maintaining a more stabilized
connection and durable structure between the insulating
housing device of the present invention and the electrical
appliance wherein the novel electrical contact device may
be used.
Other objects of the present invention will become
apparent during the course of the following speci?cation.
In the attainment of the aforesaid objective, the inven
tive concept of the present invention may be realized
through the provision of an electrical contact device
which is constituted of a non-conducting tubular housing
FIGURE 2 is a longitudinal sectional view of the
spring-type barrel contact.
FIGURE 3 is a side elevational view showing the in
tegral spring-type barrel contact during one stage of its
fabrication.
Referring now more particularly to the accompanying
" drawing, in which like numerals designate like parts
throughout the ‘several views, the numeral =10 indicates
the novel electrical contact device embodying the princi
ples of the present invention. The electrical contact de
made of an insulating material, such as rubber or plastic 40 vice 10 is substantially constituted of a recessed end non
conducting housing 11 which is illustrated in FIGURE 1.
or the like, and an elongated contact or jack carried con
centrically Within the bore ofthe tubular housing.
The non-conducting tubular housing may be provided
A longitudinal tubular threaded portion 12 is integrally
connected to a shorter cylindrical ring portion 13‘. The
base '14 of the shorter cylindrical ring portion 13 has a
stricted internal bore portion near one end of the threaded, 45 conical portion '15 to ‘accommodate more conveniently
the plug which is inserted therein. A bore 16 com
longitudinal tubular portion. The constricted bore por
municates with each end ‘17 and '18 of the housing 11.
tion is signi?cantly smaller in diameter than the diameter
Near one end 18 of the bore 16 is disposed concentrically
of the adjacent bore. It is apparent that the constricted
a constricted bore portion :19.
bore portion will eifectively retain a full-round barrel in
A spring-type contact 20, as shown in FIGURE 2,
sert within its housing bore upon subsequent Withdrawal
is structurally constituted of an elongated tubular por
of the plug from the bore of the barrel insert.
with a bore having a uniform diameter except for a con
A permanent connection between the contact or barrel
tion 21. A base 22 is integrally formed at one end 23
thereof and another end 24 has a slot (not shown) dis- .
insert and the housing is maintained. Insertion or with
posed on one side of the tubular portion 21. The slot
drawal of the plug from the bore of the contact prevents
concurrent withdrawal or loosening of the contact within 55 continutes to form a narrower slot. The slots are ‘formed
the con?nes of the tubular housing.
when the barrel insert takes the shape of a cylindrical
This structural feature is attained through the provi
tube at the ?nal stage of its fabrication.
sion of a constricted portion near one end of the contact
A lead connector 32 is integrally formed with one end
or barrel insert and circumscribing its axis transversely.
portion 24 as illustrated in FIGURE 2.
This type of barrel insert may be a spring type insert for 60 The spring-type insert ‘20 is inserted into the bore 16
accommodating a solid type plug. Its sleeve may be con
of the housing 11 as shown in FIGURE 1. The fric
stituted of two inwardly directed side walls diametrically
tional engagement of the ring 19 disposed within the
opposed to each other.
bore 16 near one end of the contact housing 11 permits
The contact is provided with an elongated slot having a
one to withdraw or insert a plug freely Within the bore
wider portion adjacent the lead so as to provide a greater 65
of the receptacle or insert 20 which great ease and without
degree of resiliency and to engage the barrel insert within
‘fear of damaging the contact or causing permanent dis
the housing more securely.
engagement or damage to the housing from [the chassis
At the outermost end of one slotted end portion may
be integrally connected thereto a lead portion to connect
a lead which may be subsequently soldered thereto in the
usual known manner.
or electrical appliance wherein the novel contact device
is used. As is apparent from the construction illustrated
in FIGURE 3, ‘the insulating, non-conducting housing
permits the lead connector 32, to extend outwardly pro
3,054,083
3
jecting from the con?nes of the housing bore at one end
thereof.
The housing 10 is made to accommodate the spring
type barrel insert 20 shown in FIGURE 2. The tubular
portion 21 of the spring type barrel insert 20 as shown
in FIGURE 9 is further constituted of at least two Win
dows or apertures 21a, slots 21b and bent portions 210.
The assembly of the receptacle device is apparent from
the above description. If, by way of example, the user
desires to assemble a receptacle device consisting of the 10
A
desired, therefore, that only such limitations be imposed
on the appended claim as are described.
non-conducting housing 11 (FIG. 1) and conducting con
tact 20 (FIG. 3), he will proceed to manufacture the
housing 11 by casting, drilling and turning, or by any
What is claimed is:
An electrical contact receptacle for a spring type plug,
said receptacle comprising a non-conducting housing hav
ing a tubular portion, said tubular portion having an outer
threaded surface, and a cylindrical ring portion shorter
than and integral with said tubular portion, said cylindri
cal ring portion having a larger outer diameter than said
tubular portion and having inner conical side walls en
closing an inner space adjacent the outer end of said ring
portion, said tubular portion and said ring portion hav
ing an inner bore of substantially uniform diameter ex
tending from said inner space to the outer end of said
other convenient means. The contact 20 is ?rst stamped
to form a ?at sheet illustrated in FIG. 9. This sheet is 15 tubular portion, said tubular portion having an inner
rolled tightly and introduced into the inner bore 16 of
the housing 11 (FIG. 1) and is shaped therein by any
suitable means to assume the form shown in FIG. 3.
It is apparent that the windows 21a will be located upon
the surfaces of the inner constricted bore portion 19 of
the housing 11, thereby facilitating the shaping of the
portions of the contact located between the windows, to
the outlines of the constricted bore portion 19‘, while the
slots 21b facilitate the shaping of the constricted portion
210 shown in FIG. 3. It is apparent that a longitudinal 25
slot is formed by the opposed longitudinal edges of
the sheet shown in FIG. 9, after the sheet has been shaped
constricted bore portion of smaller inner diameter than
that of said inner bore and located adjacent to but spaced
from said outer end of the tubular portion; a conducting
spring type contact adapted to ?t within said housing and
having substantially cylindrical end portions and a sub
stantially cylindrical intermediate portion of equal di
ameter, said contact having other constricted portions ex
tending between said end portions and said intermediate
portion, one of said constricted portions being longer than
the other, said contact having a longitudinal slot extending
from end to end thereof with a portion of said slot adja
cent one end of said contact being narrower than at the
other end, said contact'fnrther having other slots which
are shorter than said longitudinal slot and which extend
tudinal slot having a narrower portion and Wider portion
was found to be most effective, since slot portions of 30 adjacent and parallel to said narrower portion thereof,
said other slots extending in said contact in the constricted
different widths will exert different spring actions upon
to assume the form shown in FIG. 3. The use of a longi
a plug inserted into the contact.
It was found to be
most desirable that the body portion of the plug be
portion thereof of greater length, and window openings
extending in said contact in the constricted portion thereof
engaged more tightly due to the provision of the narrow
of lesser length, and a lead connector integral with said
vice of the present invention and the procedure of con
contact engaging the walls of the inner bore of said hous
ing, the constricted portion of said contact of lesser length
slot portion, than the end portion of the plug which is 35 contact and extending outwardly from one end thereof;
said contact ?tting within said housing with the cylindrical
located opposite the wider slot portion.
end portions and cylindrical intermediate portion of said
Operation and installation of the electrical contact de
necting the electrical circuit leads are, obviously, apparent
40 engaging the inner constricted bore portion of said hous
from the foregoing description.
ing, said lead connector of said contact extending out of
From the foregoing description, together with the
accompanying drawing, it will be apparent that this in
vention provides a contact structure which is economical
to manufacture and which enables the user to achieve a
maximum degree of effectiveness between contact pro 45
visions.
said housing at the end opposite the cylindrical ring por
tion thereof.
References Cited in the ?le of this patent
UNITED STATES PATENTS
>
Another very important advantage of the present in
. vention is that the ?rm and durable connection created
between the contacting parts affords greater economy of
replacement parts and maintenance.
Ease of assembly at minimized cost is also another
salient feature of the present invention.
While there is above disclosed but one embodiment of
the structure of the invention herein presented, it is pos 55
sible to produce still other embodiments without departing
from the inventive concept herein disclosed, and it is
2,180,923
2,318,647
Del Camp __________ __ Nov. 21, 193.9
White _______ _V______,__V_ May 11, 1943
2,499,297
Buchanan ____________ __ Feb. 28, 1950
2,557,746
2,700,144
2,704,357
2,762,024
‘Ingham ______________ __ June 19,
Flanagan ____________ _._ Jan. 18,
Johnson’ ____________ __ Mar. 15,
Heath _______________ .__ Sept. 4,
1951
1955
1955
1956
FOREIGN PATENTS
154,312
Switzerland s ______ ______ Aug. 1, 1932
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