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US005666408A

UIllted

States

Patent

[19]

[11]

Patent

Number:

5,666,408

Lao

[45]

Date

Patent:

Sep.

1997

[54]

DUAL-LINE

TELEPHONE

JACK

ADAPTER

4,651,340

3/1987

Marson

.................................

379/327

AND

CABLE

COUPLER

5,328,390

7/1994

Johnston

...............................

439/638

[76]

Inventor:

Kenneth

Lao,

650

Glen

Ave.,

Primary

Examiner-Dwayne

B08!

west?eld,

NJ.

07090

Assistant

Examiner-Keith

Ferguson

[57]

ABSTRACT

[21]

Appl.

No.:

555,843

[22]

Filed_

Nov

13 1995

4-pin

telephone

jack

adapter

which

alters

the

con?gu

ration

of a

4-pin

telephone

jack

such

that

the

phone

line

[51]

Int.

Cl.6

....................................................

H04M

1/00

Connected

the

two

Outer

PinS

the

jack

connected

[52]

U.S.

c1.

.........................

379/442

439/638'

439/676

‘he

tw°

inner

Pins

the

adapt“ and

accessible

t°

[5 8]

arch

’

379/142

438

one-line

telephone

set.

The

4-pin

telephone

jack

adapter

can

379/327

397

332

437

439/638

have

two

receptacle

one

which

alters

the

pin con?guration

628*

653’

676’

639’

646

502’

of a 4-pin

telephone

jack

while

the

other

has

the

same

’

con?guration.

With

such

adapter,

two

one-line

telephone

[56]

References

Cited

sets

can

separately

access

two

phone

lines

connected

4-pin

telephone

jack.

The

same

connection

can

U.S.

PATENT

DOCUMENTS

applied

telephone

cable

coupler

and

a telephone

exten

4,29s,702

10/1981

Snyder

..................................

379/442

81°11

cable‘

4,362,905

12/1982

Ismail

.......

379/442

4,444,451

4/1984

Myers

...................................

439/638

Claims,

Drawing

Sheets

It‘

-.-24

'§\

I’

Summary of content (15 pages)

PAGE 1
l|l | l l l l l l i l l l l l l l l l l l l l l l l Il l l l l l l l l l l US005666408A UIllted States Patent [19] [11] Patent Number: Lao [45] Date of Patent: [54] 5,666,408 Sep. 9, 1997 DUAL-LINE TELEPHONE JACK ADAPTER 4,651,340 3/1987 Marson ................................. .. 379/327 AND CABLE COUPLER 5,328,390 7/1994 Johnston ............................... .. 439/638 [76] Inventor: Kenneth Q. Lao, 650 Glen Ave., Primary Examiner-Dwayne B08! west?eld, NJ.
PAGE 2
US. Patent Sep.9, 1997 Sheet 1 of 11 }A_ \§ FIL. 5,666,408 .
PAGE 3
US. Patent Sep.9, 1997 Sheet 2 of 11 5,666,408 ‘ 20 22 |_.._._......... FIG.
PAGE 4
US. Patent Sep. 9, 1997 Sheet 3 0f 11 5,666,408 ¢ .
PAGE 5
US. Patent Sep. 9, 1997 ‘Sheet 4 of 11 5,666,408 .
PAGE 6
U.S. Patent Sep.
PAGE 7
U.S. Patent Sep. 9, 1997 Sheet 6 0f 11 9/ .
PAGE 8
U.S. Patent Sep.9, 1997 Sheet 7 of 11 5,666,408 i FIG. 8 _ w, ql. 9, _ 3"a $.10 Jo ILFl _ _ .2| 1/ FIG. 9 2/ “wt51‘.uI9 _ _ _ _ ~\_ _.
PAGE 9
US. Patent Sep.9, 1997 #1. a) Sheet 8 0f 11 5,666,408 mu, l “l9i.n 2 oz 2 .
PAGE 10
US. Patent Sep.9, 1997 Sheet 9 0f 11 5,666,408 9.. 2 .
PAGE 11
US. Patent Sep.
PAGE 12
U.S. Patent Sep.9, 1997 R \ . s\ Sheet 11 0f 11 5,666,408 2., awn. I|l a £11]. 1|"Il l l.1 L. _ s.
PAGE 13
5,666,408 1 2 DUAL-LINE TELEPHONE JACK ADAPTER AND CABLE COUPLER comprising two receptacles and one plug and 5) an extension BACKGROUND OF THE INVENTION phone plug on the adapters and couplers, according to the cable comprising one plug on one end of the cable and one or more receptacles on the other end. The receptacle or the present invention, can have two exposed pins or four The present invention is related to a phone jack coupler exposed pins.
PAGE 14
5,666,408 3 4 FIG. 12 illustrates the pin connection another embodi ment of the one-to-two telephone cable coupler. FIG. 13 illustrates the pin connection in another embodi ment of the one-to-two telephone extension cable. pins (rn.q) while inner pins (b,c) are electrically connected to inner pins (o,p). The pin connection between receptacles 30 and 50 are the same as that illustrated in FIG. 3. FIG.
PAGE 15
5,666,408 5 6 FIG. 13 illustrates the pin connection in another embodi 2 of said telephone jack to the respective lines of said ment of the one-to-two extension cable wherein two of the another telephone plug. receptacles each has only two pins while the plug has four 8. The adapter of claim 7 further comprising a cable comprising a plurality of wires to provide electrical connec tions from said ?rst plug to said ?rst and second receptacles. 9.