Telephone Attachment. Page: 5 of 5
2 sheets, 3 p. : ill. ; 23 cm.View a full description of this patent.
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941,086
to constitute the terminals thereof, a contact
common to and normally bridging said
strips and adapted to be electrically con-
nected to the'speaking circuit, other contacts
5 individual to the strips and adapted to be
both electrically connected to the same side
of the signal in the signal circuit, and means
for moving either strip from. the common
contact into engagement with its individual
10 contact.
2. An attachment for telephones compris-
ing two conducting strips adapted to be con-
nected each to the end of a divided line and
constituting the terminals thereof, a contact
15 common to said strips and -adapted to be
connected to a telephone hook, other con-
tacts individual to the strips and adapted to
be both connected to the signal circuit, and
means for moving either strip from the
20 common contact into engagement with its
individual contact comprising a cam mem-
ber intermediate of said spring strips and
ineqns for rotating said cam member.
3. An attachment for telephones compris-
25 ing two conducting spring strips adapted to
be connected to the ends of a divided line to
constitute the terminals thereof, a contact
common to said strips and adapted to* be
connected to a telephone hook, other con-a
tacts individual to the strips and adapted to 30
be both connected to the signal circuit,
means for moving either strip from the com-
mon contact into engagement with its in-
dividual contact comprising a cam member
intermediate of said spring strips and means 35
for rotating said cam member, and a connec-
tion from the telephone hook to the means
for rotating the cam member.
4. An-attachment for telephones compris-
ing a. suitable support, spring strips-therein 40
fast thereto at one end and free at the other
end, a contact stud between and'in the path
of both strips at their free ends, other con-
tact' studs on opposite sides of the first
named contact stud and each in the path of 45
one only of the .spring strips, and a cam
member intermediate of the spring strips
and adapted to move either spring strip but
not both at once to contact with the studs on
either side of the central stud. 50
In testimony that I claim the foregoing
as my own, I have hereto affixed my signa-
ture in the presence of two witnesses.
CHAS. B. MITCHELL.
Witnesses:
BEN C. LovE,
H. G. YELVERTON.
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Mitchell, Charles B. Telephone Attachment., patent, November 23, 1909; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth508234/m1/5/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.