[0001] The present invention relates to a cathode ray tube (CRT) socket in accordance with
the preamble of Claim 1. Such a socket is known from EP-A-0 268 940.
[0002] There are two kinds of CRT sockets. Figs. 8(a) and 8(b) and 9 show a soldering type
CRT socket, and Figs. 10(a), 10(b) and 11 show a press contact or snap-in type CRT
socket. Either type of CRT socket comprises a housing 5 or 15, a focus connection
contact 1 or 11 and a focus spark-gap contact 2 or 12 along with other necessary contacts
(not shown) all together built in the housing. The focus connection contact 1 or 11
is connected to the focus spark-gap contact 2 or 12 and a high-voltage lead conductor
4 or 14. In the soldering type CRT socket, the terminal extension 1a of the focus
connection contact 1 is laid on the terminal extension 2a of the focus spark-gap contact
2 with their apertures 3 registering in alignment. The core conductor end 4a of the
high-voltage lead conductor 4 is inserted in the registering apertures 3, and then
the core conductor end 4a is soldered to the terminal extensions 1a and 2a of the
contacts 1 and 2, as seen from Figs. 8 and 9.
[0003] In the snap-in type CRT socket as shown in Figs. 10(a), 10(b) and 11, the terminal
extension 11b of the focus connection contact 11 has a folded end, and the terminal
piece 12b of the focus spark-gap contact 12 has a counter wall. These contacts 11
and 12 are arranged with the folded end of the focus connection contact 11 pushed
resiliently against the counter wall of the focus spark-gap contact 12. The core conductor
end 14a of the high-voltage lead conductor 14 is press-fitted between the folded end
of the focus connection contact 11 and the counter wall of the focus spark-gap contact
12. In Figs. 8 and 10 a spark-gap electrode is indicated at 2c and 12c.
[0004] As is apparent from the above, each different type CRT socket requires a focus connection
contact and a focus spark-gap contact, which are designed to be exclusively used for
the particular type.
[0005] Stated otherwise, there is no part which can be compatible with each other or can
be commonly used. In this connection a maker must prepare two different kinds each
of focus connection contact and focus spark-gap contact in making soldering type and
snap-in type CRT sockets.
[0006] With the above in mind the object of the present invention is to provide a CRT socket
structure which permits the common use of the focus connection contact in the soldering
and snap-in types, thereby reducing the number of the kinds of the parts in making
these different type CRT sockets.
[0007] To attain this object a CRT socket according to the present invention comprises a
housing, a focus connection contact and a focus spark-gap contact, these contacts
along with other necessary contacts being built in the housing, said focus connection
contact being connected to said focus spark-gap contact and a high voltage lead conductor
and having a press contact terminal, and said focus spark-gap contact having a first
terminal to be press-fitted in the press contact of said focus connection contact
and a second terminal to be connected to a high-voltage lead conductor. According
to one particular embodiment of the present invention the second terminal of the focus
spark-gap contact has an aperture to catch the stripped end of the high-voltage lead
conductor for soldering the high-voltage lead conductor to the focus spark-gap contact.
According to another particular embodiment of the present invention the second terminal
of the focus spark-gap contact has a folded catch end for permitting the press-contact
of the high-voltage lead conductor in the focus spark-gap contact. The focus connection
contact can be commonly used in either type, soldering or snap-in type CRT socket.
[0008] Other objects and advantages of the present invention will be understood from the
following description of soldering and snap-in type CRT sockets according to the present
invention, which are shown in accompanying drawings:
Fig. 1(a) is a plane view of a soldering type CRT socket, showing how a high-voltage
lead conductor is connected to its contacts;
Fig. 1(b) is a side view of the soldering type CRT socket;
Fig. 2 is a longitudinal section of the soldering type CRT socket;
Fig. 3 is a side view of a focus connection contact, which is used in a CRT socket
according to the present invention;
Fig. 4 is a side view of the focus connection contact as seen from the left side of
the contact of Fig. 3;
Fig. 5 is a plane view of the focus connection contact as seen from the top of the
contact of Fig. 3;
Fig. 6(a) is a plane view of a snap-in type CRT socket, showing how a high-voltage
lead conductor is connected to its contacts;
Fig. 6(b) is a side view of the snap-in type CRT socket;
Fig. 7 is a longitudinal section of the snap-in type CRT socket;
Fig. 8(a) is a plane view of a conventional soldering type CRT socket, showing how
a high-voltage lead conductor is connected to its contacts;
Fig. 8(b) is a side view of the conventional soldering type CRT socket;
Fig. 9. is a longitudinal section of the conventional soldering type CRT socket;
Fig. 10(a) is a plane view of a conventional snap-in type CRT socket;
Fig. 10(b) is a side view of the conventional snap-in type CRT socket, showing how
a high-voltage lead conductor is connected to its contacts; and
Fig. 11 is a longitudinal section of the conventional soldertype CRT socket.
[0009] Figs. 1(a), 1(b), 3, 4 and 5 show a CRT socket according to one particular embodiment
of the present invention in which a focus spark-gap contact is designed for soldering
a high voltage lead conductor to the contact. As shown in these drawings, the CRT
socket has a focus connection contact 21 and a focus spark-gap contact 22, which are
built in a housing 25 along with other necessary contacts. The focus connection contact
21 has a split tubulate terminal at one end and a press contact terminal 21c at the
other end of the contact. The press contact terminal 21c is formed by the inversed
"U"-shaped end of the elongated contact strip integrally connected to the split tubulate
terminal at one end of the contact 21. The inversed "U"-shaped end 21c has a slit
21d made at its bent portion. The focus spark-gap contact 22 has a first, lateral
terminal elongation 22d to be connected to the press contact terminal 21c of the focus
connection contact 21 and a second, longitudinal terminal elongation 22e to be connected
to a high voltage lead conductor 4 by soldering. The second terminal elongation 22e
has an aperture 22f to catch the core conductor end 4a of a high voltage lead conductor
4. As shown in Figs. 1 and 2, the focus connection contact 21 is connected to the
focus spark-gap contact 22 by pushing the first terminal elongation 22d of the focus
spark-gap contact 22 in the slit 21d of the inversed "U"-shaped end 21c of the focus
connection contact 21, and the focus spark-gap contact 22 is connected to a high-voltage
lead conductor 4 by inserting its core conductor and 4a in the aperture 22f of the
first terminal elongation 22e of the focus spark-gap contact 22.
[0010] Figs. 6(a), 6(b), and 7 show a CRT socket according to another particular embodiment
of the present invention in which a focus spark-gap contact is designed to permit
press-contacting of a high voltage lead conductor to the contact. The same reference
numerals as used in Figs. 1 to 5, are used in Figs. 6 and 7 to indicated the same
parts of the CRT socket. The CRT socket uses the same focus connection contact 21
as used in the soldering type of Figs 3 to 5. The focus spark-gap contact 32 has a
first, lateral terminal elongation 32d to be connected to the press contact terminal
21c of the focus connection contact 21 and a second, longitudinal terminal elongation
32g to permit a high voltage lead conductor 4 to press-contact to the contact 32.
The second terminal elongation 32g has a stationary contact part 32g₁ and a movable
contact part 32g₂. These parts are formed by bending and folding the lateral projection
of the second terminal elongation 32g, as best shown in Fig. 6. Thus, the movable
contact part 32g₂ pushes itself against the stationary contact part 32g₁ resiliently.
The focus spark-gap contact 32 is connected to a high-voltage lead conductor 4 by
pushing its core conductor end 4a between the stationary and movable contact parts
32g₁ and 32g₂. In Figs. 1, 2, 6 and 7 the spark-gap electrodes are indicated at 22c
and 32c.
[0011] As shown in Fig. 7, the housing 35 is open upward at a place in which a spark electrode
is contained. The housing 35 has a press-fit closure 31 to close its opening. The
press-fit closure 31 has an aperture to allow the press contact elongation 32g of
the focus spark-gap contact 32 to pass through. Also, the press-fit closure 31 has
a press-fit cap 37 hinged at 38 to the top of the press-fit closure 31 for closing
the aperture of the press-fit closure. An upright enclosure 36 is fixed to the top
of the press-fit closure body 33, and the stationary contact part 32g₁ is held by
the upright enclosure will to prevent the stationary contact part 32g₁ from bending
outwards. The press-fit cap 37 has a push projection 30 integrally connected to its
inside ceiling, and the movable contact part 32g₂ is pushed against the stationary
contact part 32g₁ by the push projection 30 of the press-fit cap 37, thereby firmly
holding the core conductor 4a of the high voltage lead conductor 4. When the press-fit
cap 37 is closed with its front edge caught by a guide ridge 39 which is integrally
connected to the top of the press-fit closure 31, the opposite side projections (not
shown) of the press-fit closure body 33 will be put in engagement with the counter
recesses of the press-fit cap 37, thus locking the press-fit cap 37.
[0012] As may be understood from the above, a focus connection contact having a press-contact
terminal can be mated with a focus spark-gap contact having a lateral extension by
press-fitting the lateral extension of the focus spark-gap contact in the press-contact
terminal of the focus connection contact, whether the CRT socket is of the soldering
type or of the snap-in type. The use of such a compatible focus connection contact
permits reduction of the number of the kinds of required parts by one in making CRT
sockets.
1. A cathode ray tube socket comprising a housing (25, 35), a focus connection contact
(21) and a focus spark-gap contact (22, 32), these contacts along with other necessary
contacts being built in the housing, said focus connection contact being connected
to said focus spark-gap contact and a high-voltage lead conductor (4), characterized
in that said focus connection contact (21) has a press contact terminal (21c), and
said focus spark-gap contact (22, 32) has a first terminal (22d, 32d) to be press-fitted
in the press contact of said focus connection contact and a second terminal (22e,
32g) to be connected to said high-voltage lead conductor.
2. A cathode ray tube socket claimed in Claim 1 wherein said second terminal (22e) has
an aperture (22f) to catch the core end of said high-voltage lead conductor.
3. A cathode ray tube socket claimed in Claim 1 wherein said second terminal (32g) has
a folded catch end (32g₁, 32g₂).
1. Sockel für eine Kathodenstrahlröhre, mit einem Gehäuse (25, 35), einem Fokussierelektrode-Anschlußkontakt
(21) und einem Fokussierelektrode-Abspratzspalt-Kontakt (22, 32), welche Kontakte
zusammen mit anderen erforderlichen Kontakten in das Gehäuse eingebaut sind, wobei
der Fokussierelektrode-Anschlußkontakt mit dem Fokussierelektrode-Abspratzspalt-Kontakt
und einer Hochspannungszuleitung (4) verbunden ist, dadurch gekennzeichnet, daß der Fokussierelektrode-Anschlußkontakt (21) über einen Preßkontaktanschluß (21c)
verfügt, und der Fokussierelektrode-Abspratzspalt-Kontakt (22, 32) über einen ersten
Anschluß (22d, 32d), der in den Preßkontakt des Fokussierelektrode-Anschlußkontakts
durch Preßpassung einzupassen ist, und einen zweiten Anschluß (22e, 32g) verfügt,
der mit der Hochspannungszuleitung zu verbinden ist.
2. Sockel für eine Kathodenstrahlröhre nach Anspruch 1, bei dem der zweite Anschluß (22e)
über eine Öffnung (22f) zum Aufnehmen des Kernendes der Hochspannungszuleitung verfügt.
3. Sockel für eine Kathodenstrahlröhre nach Anspruch 1, bei dem der zweite Anschluß (32g)
über ein umgelegtes Aufnahmeende (32g₁, 32g₂) verfügt.
1. Prise pour tube à rayons cathodiques comprenant un boîtier (25, 35), un contact de
connexion de concentration (21) et un contact d'éclateur de concentration (22, 32),
ces contacts ainsi que d'autres contacts nécessaires étant construits dans le boîtier,
ledit contact de connexion de concentration étant connecté audit contact d'éclateur
de concentration et à un conducteur d'amenée de la haute tension (4), caractérisé
en ce que ledit contact de connexion de concentration (21) a une borne de contact
à pression (21c), et ledit contact d'éclateur de concentration (22, 32) a une première
borne (22d, 32d) à ajuster sous pression dans le contact à pression dudit contact
de connexion de concentration et une seconde borne (22e, 32g) à connecter audit conducteur
d'amenée de la haute tension.
2. Prise pour tube à rayons cathodiques selon la revendication 1 dans laquelle ladite
seconde borne (22e) a une ouverture (22f) pour saisir l'extrémité de l'âme dudit conducteur
d'amenée de la haute tension.
3. Prise pour tube à rayons cathodiques selon la revendication 1 dans laquelle ladite
seconde borne (32g) a une extrémité de saisie pliée (32g1, 32g2).