AN IMPROVED PENDULUM IMDICATOR FOR ELECTRIC BELLS
Year: 1884

page_text: I, EDWARD PHILEMON TIMMINS of 2 Bute Place, Docks, Cardiff in the County
of Glamorgan, Consulting Engineer do hereby declare the nature of my said
Invention for "AN IMPROVED PENDULUM IMDICATOR FOR ELECTRIC BELLS " to
be as follows: —
The improvements in this Invention refer to the construction of pendulum
indicators for electric bells as used for ordinary purposes in hotels, dwelling houses
and the like.
My indicator for electric bells consists of a pendulum suspended to one end of a
curved or bent spring, the other end of which spring is attached in any suitable
manner to the casing of apparatus or other suitable support.
Attached to the spring aforesaid is an armature. An electro-magnet is also
provided which is in communication by means of wires with a battery. Upon the
circuit being completed by pressing a "push" or "button" the electro magnet
attracts the armature attached to the spring bearing the pendulum and holds same
as long as the "push" or "button" is pressed. Upon said "push" or "button
being released and contact broken the armature is liberated from the magnet and
the spring and pendulum vibrate.
"
When desired a bell may be attached to the pendulum in lieu of the disc as
ordinarily fitted and said bell will be caused to be sounded by the vibration of the
pendulum and thus serve the double purpose of bell and indicator.

page_text: I, EDWARD PHILEMON TIMMINS of 2 Bute Place, Docks, Cardiff, in the County
of Glamorgan, Consulting Engineer, do hereby declare the nature of my said
Invention for "AN IMPROVED PENDULUM INDICATOR FOR ELECTRIC BELLS" and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, reference being had to the
accompanying Drawings and to the letters and marks of reference thereon, that is
to say :-
The improvements in this Invention refer to the construction of pendulum
indicators for electric bells as used for ordinary purposes in hotels, dwelling-houses,
and the like. Among the advantages of my Invention are economy in manufacture
and no working parts liable to stick or get out of order by ordinary wear.
My indicator for electric bells consists of a pendulum suspended to one end of a
curved or bent spring, the other end of which spring is attached in any suitable
manner to the casing of apparatus or other suitable support; and attached to the
spring aforesaid is an armature.
By forming the pendulum suspender of a curved or bent spring, as aforesaid, and
attaching the armature thereto, instead of to the disc or wire of pendulum itself,
as in ordinary pendulum indicators, greater sensitiveness in regulation of vibration
is obtained. Furthermore, the armature of pendulum, when latter is suspended by
a hinge, frequently sticks to the magnet, as the pendulum alone is not always
sufficient to bring it away if any residual magnetism remain after current has
ceased. The spring in this my Invention obviates this defect.
"
An electro-magnet or electro-magnets are provided, in communication by means
of wires with a battery and bell. Upon the circuit being completed by pressing a
"push" or "button," the electro-magnet or magnets attract the armature attached
to the spring bearing the pendulum aforesaid and hold same as long as the "push
or "button" is pressed. Upon said "push" or "button" being released contact is
broken, the armature is liberated from the magnet or magnets, and the spring and
pendulum vibrate. When desired, a bell may be attached to the pendulum in lieu
of, or in addition to, the disc as ordinarily fitted, and said bell will be caused to be
sounded by the vibration of the pendulum and thus serve the double purpose of
bell and indicator. By this arrangement ordinary bells may be converted into
electric bells.
And in order that this my Invention may be more fully understood reference is
had to the accompanying Drawings.
Figure 1 Sheet 1 is a front elevation of my improved pendulum indicator
provided with a two bobbin electro-magnet; Figure 2 is an end view of same; and
Figure 3 a front elevation of my improved pendulum indicator with electro-magnet
placed vertically.
Figure Sheet 2 represents my improved pendulum indicator with electro-
magnet placed horizontally; Figure 5 shews an arrangement of my pendulum
indicator having the curved spring aforesaid placed in a reverse position; and
Figure 6 illustrates the pendulum indicator with bell attached in lieu of the
ordinary disc.
Similar letters refer to like parts in all the Figures. a is the curved or bent
spring to one end of which the pendulum b is suspended. c is the armature
attached to spring a. dd are the electro-magnets.

page_text: Having now particularly described and ascertained the nature of this my
Invention and in what manner the same is to be performed, I declare that what
I claim is:
First. The construction of pendulum indicators for electric bells with a curved or
bent spring suspending the pendulum, substantially as hereinbefore set forth and
described.
Second. Attaching the armature in pendulum indicators for electric bells to
the curved or bent spring aforesaid, substantially as herein before set forth and
described.
Third. The fitting of a bell to pendulum of pendulum indicators in lieu of, or
in addition to, the ordinary disc, thus combining bell and indicator, substantially
as herein before set forth and described.
Fourth. The general arrangement and construction of pendulum indicators for
electric bells substantially as herein before set forth and described.
Dated this Third day of July 1884.
For EDWARD PHILEMON TIMMINS.
Horn & Son,
Patent Agents,
Surrey Chambers,
172, Strand, W.C.