Improvements in Attachments for Operating Telephone Call-bells.
Year: 1897

page_text: Date of Application, 27th May, 1897
Complete Specification Left, 28th Feb., 1898-Accepted, 27th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in Attachments for Operating Telephone Call-bells.
I, HOSEA WAITE LIBBEY, of 55, Rutland Square, in the City of Boston, County
of Suffolk and State of Massachusetts, Physician, do hereby declare the nature of
this invention to be as follows:-
-
In telephones when it is desired to signal by ringing the call-bell the switch-
button has to be depressed with one hand and the crank of the magneto-machine
has to be turned several times with the other hand.
Now the object of my invention is to operate the switch-button and the magneto-
machine so as to cause the bell to ring by simply pulling upon a cord with one
hand, which when released resumes its normal position ready for the operation
to be repeated.
The invention consists of a hollow spool mounted upon a stud on a line with
the shaft that has to be rotated to operate the magneto-machine, said spool
enclosing a helical spring, one end of which is attached to the stud and the other
end to the spool, a cord wound upon said spool, a ratchet-wheel secured upon the
shaft, and a pawl upon the side of the spool, so that when the cord is drawn upon
the spool will be rotated, and with it the shaft, by means of the pawl and ratchet-
wheel.
The invention also consists of a lever for depressing the switch-button, said
lever being operated by the cord passing through a beveled hole in a block on the
end of the lever and so that when the cord is released it releases the lever and will
again be wound upon the spool by the helical spring, the pawl riding over the
teeth of the ratchet-wheel, so as not to operate the shaft..
In a transmitting instrument as ordinarily constructed the shaft of the magneto-
machine has mounted upon it a crank. In applying my invention, the crank is
removed and a ratchet-wheel is secured upon said shaft near the side of the case,
and a cap is secured to the side of the casing. This cap carries a fixed stud,
having a collar that fits against the inner side of the cap, and a screw-threaded
portion passes through said cap and is secured by a nut. The inner end of the
stud is pointed and has a bearing in a conical recess formed in the end of the
shaft. Upon the stud is loosely mounted a hollow spool on one side of which is
secured a pawl that takes into the teeth of the ratchet-wheel, and within this
hollow spool is arranged a helical spring, one end of which is secured to the stud
and the other end to the inner side of the spool.
To the outside of the spool secured one end of a cord that is wound around
the spool as many times as may be desired, and the end of said cord is passed
through a beveled hole formed in a block secured to the end of a fulcrumed lever,
the inner end of which lever operates the push-button to form the electrical con-
nection. When in its normal position, the cord is wound around the spool and
the spring is unwound, and the end of the cord passing through the beveled hole in
the block, upon drawing upon the cord it is tightened and hugs the block by
reason of its passing through the beveled hole and draws down the said block and
with it the outer end of the lever, thus causing the inner end of the lever to press

page_text: upon and operate the push-button, thus completing the electric circuit, and by
continuing to pull upon the cord the spool is rotated and with it the shaft through
the pawl and ratchet-wheel, thus causing the bell to ring. As soon as the cord is
released the spring will unwind, rotating the spool in the opposite direction, and
wind the cord thereon ready to be again drawn down.
Dated this 27th day of aw 1007
Improvements in Attachments for Operating Telephone Call-bells.
I, HOSEA WAITE LIBBEY, of 55, Rutland Square, in the City of Boston, County
of Suffolk and State of Massachusetts, United States of America, Physician, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
In telephones when it is desired to signal by ringing the call-bell the switch-
button has to be depressed with one hand and the crank of the magneto-machine
has to be turned several times with the other hand.
Now the object of my invention is to operate the switch-button and the magneto-
machine so as to cause the bell to ring by simply pulling upon a cord with one
hand, which when released resumes its normal position ready for the operation
to be repeated.
The invention consists of a hollow spool mounted upon a stud on a line with
the shaft that has to be rotated to operate the magneto-machine, said spool
enclosing a helical spring, one end of which is attached to the stud and the other
end to the spool, a cord wound upon said spool, a ratchet-wheel secured upon the
shaft, and a pawl upon the side of the spool, so that when the cord is drawn upon
the spool will be rotated, and with it the shaft, by means of the pawl and ratchet-
wheel.
The invention also consists of a lever for depressing the switch-button, said
lever being operated by the cord passing through a beveled hole in the block on the
end of the lever and so that when the cord is released it releases the lever and will
again be wound upon the spool by the helical spring, the pawl riding over the
teeth of the ratchet-wheel, so as not to operate the shaft.
Referring to the accompanying drawings,
Fig. 1, represents a portion of a telephone transmitting instrument with an
attachment embodying my invention for operating the magneto-machine applied
thereto.
Fig. 2, is a side view of the same.
Fig. 3, is a section taken on line a, a, of Fig. 1.
Fig. 4, is a section taken on line z, z, of Fig. 1.
Fig. 5, is a section taken on line y, y, of Fig. 1, and
Fig. 6, is a detail.
Fig. 7, shows a telephone and connections with my improvements applied
thereto.
A, represents a portion of the casing of a transmitting instrument; B, the shaft
of the magneto-machine upon which the crank is usually placed. To apply my
invention the crank is removed, and a ratchet-wheel C, is secured upon the shaft
near the side of the case.
D, is a cap secured to the side of the casing A. This cap carries a fixed stud E,
having a collar e, that fits against the inner side of the cap, and a screw-threaded
,

page_text: portion e¹, passes through said cap and is secured by a nut F. The inner end of
the stud E, as shown, is pointed and has a bearing in a conical recess formed in the
end of the shaft B. Upon the stud E, is loosely mounted a hollow spool G, on one
side of which is secured a pawl H, that takes into the teeth of the ratchet-wheel C,
and within this hollow spool G, is arranged a helical spring I, one end of which
is secured to the stud E, and the other end to the inner side of the spool G.
To the outside of the spool G, is secured one end of a cord J, that is wound
around the spool G, as many times as may be desired, and the end of said cord
is passed through a bevelled hole k, formed in a block K, secured to the end of a
lever L, fulcrumed at 7, the inner end of which lever operates the push-button M,
to form the electrical connection. When in its normal position, the cord J, is
wound around the spool G, and the spring I, is unwound, and the end of the cord
passes through the beveled hole k, in the block K. Now by drawing upon the
cord J, it is tightened and hugs the block K, by reason of its passing through
beveled hole k, and draws down the said block K, and with it the outer end of the
lever L, thus causing the inner end of the lever to press upon and operate the
push-button M, thus completing the electric circuit, and by continuing to pull
upon the cord the spool G, is rotated, and with it the shaft B, through the pawl H,
and the ratchet-wheel C, thus causing the bell to ring. As soon as the cord is
released the spring I, will unwind, and thus rotating the spool in the opposite
direction, wind the cord thereon ready to be again drawn down.
Referring to Fig. 7, the operation is as follows:--The operator pulls the cord J,
which causes the spool G, to rotate, thereby imparting a rotary motion to the
armature N, thus inducing a current. At the same time the cord, passing through
the eye k, operates the lever L, and depresses the button M, throwing the spring P,
in contact with the point p, producing a circuit through the bell-magnets Q,
setting in motion the hammer R, which taps the bells S, at the same time sounding
the bells at the other end of the line. Upon releasing the cord J, and removing
the telephone from its support the bell-circuit is cut off and the line circuit opened
through the switch Y, in the usual manner. T, is the telephone, U, the switch,
and V, the lighting-arrester.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. In combination with the bell-operating shaft of a telephone, a lever secured
to the casing of the instrument one end of said lever being over the push-button,
and the other end having a block with a beveled hole through it, a cord passing
through said block, and wound around a spool adapted to rotate the bell-shaft
when the cord is pulled out, as set forth.
2. In combination with the bell-operating_shaft B, a ratchet-wheel C, cap D,
stud E, spool G, spring I, pawl H, and cord J, lever L, carrying block K, having
a beveled hole through which the cord passes, all arranged and operated as set
forth.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.