An Improved Construction and Mounting of the Spring Armature and Hammer for Electric Bells and other like Electrical Instruments.
Year: 1889

page_text: Date of Application, 24th Apr., 1889
Complete Specification Left, 24th Jan., 1890-Accepted, 15th Mar., 1890
PROVISIONAL SPECIFICATION.
An Improved Construction and Mounting of the Spring Armature and
Hammer for Electric Bells and other like Electrical Instruments.
I JAMES CHARLES WILLIAMSON of 42 Rhodeswell Road Stepney London E. Chemist
do hereby declare the nature of this invention to be as follows:-
This invention relates to the improved construction and mounting of the spring
armature and hammer for electric bells and the like electrical instruments and consists
in mounting the armaturo on a spring (straight or curved) which may be of steel
brass or other suitable metal and which at its free end carries the hammer for an
electric bell.
A vibrating tongue piece (to hold the platina plate) stamped out of the spring
piece or may be a separate piece rivetted thereto-the part of the spring extending
from the armature to the hammer is rendered rigid by being corrugated fluted or
otherwise curved.
By this means considerable economy in manufacture is effected as the hammer may
be formed with a projection to rivet same to the spring instead of having to tap and
screw such hammer as heretofore and also doing away with the tapping and screwing
of the armature as heretofore necessary.
It will be obvious that instead of a hammer being attached to sound a bell or gong
as herein before described any other signalling apparatus or device may be secured to
such vibrating arm or spring to give a signal or alarm as desired.
Dated this 24th day of April 1889.
TONGUE & BIRK
34, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Construction and Mounting of the Spring Armature and
Hammer for Electric Bells and other like Electrical Instruments.
I JAMES CHARLES WILLIAMSON of 42 Rhodeswell Road Stepney London, E. Chemist
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:
This invention relates to the improved arrangement construction and mounting
of the spring armature and hammer for electric bells and the like electrical
instruments and consists in mounting the armature on a spring (straight curved or
otherwise) which may be of steel brass or other suitable metal and which at its
free end carries the hammer for an electric bell (or other appliance as hereinafter
explained).
A vibrating tongue piece (to hold the platina point or plate) is stamped out of the
spring piece or may be a separate piece riveted or suitably secured thereto―while
that part of the spring piece extending from the armature to the hammer is
rendered rigid by being corrugated fluted or otherwise curved or shaped.
By this means amongst other advantages-considerable economy is effected as
the hammer may be formed with a projection to rivet same direct to the spring
picce instead of having to tap and screw such hammer as heretofore and also does
away with the tapping and screwing of the armature as heretofore necessary.
It will be obvious that instead of a hammer being attached to sound a bell or
gong as hereinbefore described any other signalling apparatus or other device or
appliance may be secured to the free end of my vibrating arm or spring piece to

page_text: Figure 1 shows a plan view of my spring piece with armature attached to the
underside thereof.
Figure 2 shows a side view (in elevation) of Figure 1 showing also the poles of
an electro magnet in position.
Figure 3 is a cross section (on line xx) of Figure 1 inverted showing how that
part of the spring piece from the point a to the free end b is curved or shaped so
as to render inflexible the said part from a to b.
The spring piece is all one piece of metal from c to b and is formed (by stamping
or otherwise) from a piece of ordinary flat metal spring all in one piece flat at the
end cat which end c it is suitably secured or fastened in its desired position in the
apparatus.
is the armature suitably secured as shown between the points a and c on this
novel spring piece.
f is the vibrating tongue piece (to hold the platina point) stamped out of the
spring piece itself (as shown) either all in one operation while stamping the spring
piece itself into shape or it may be stamped or formed prior thereto or subsequently.
Figures 4 and 5 show the vibrating tongue piece (to hold the platina plate
or point) formed of a separate piece of metal spring and rivetted at f¹ to the spring
piece in place of being formed out of the same piece as previously described.
g is the hammer rivetted direct to the free end 6 of the spring piece.
In operation this spring piece will allow-between the armature and the point
at which it is secured or fastened at its end c-all the spring or play required for
actuating the bell hammer or other appliance while that part from a to b being
inflexible by reason of its shape or formation will give the required firmness to the
blow or movement produced at the free end b.
The free end b may be bent between a and c up or down to suit requirements.
Any suitable sizes shapes and materials may be used without departing from the
nature of my invention.
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 an electric bell apparatus or the like the method of mounting both the armature
and hammer on a single spring piece such as -b shaped or formed at its free end
to render the latter inflexible and having the vibrating tongue which carries the platina
point either formed out of and all in one with the said spring piece or independently
attached thereto substantially in the manner and for the purposes herein before set
forth.
2. In electrical apparatus for the purposes hereinbefore set forth I claim the spring
piece c to b-for carrying the armature and shaped or formed so as to be inflexible
at its free end b and fastened in its desired position at its flat end c substantially such
as and for the purposes hereinbefore described and illustrated in the drawings hereto
annexed.
3. In electrical apparatus for the purposes herein before set forth I claim the use and
application of the spring piece c-b arranged constructed and acting substantially in the
manner and for the purposes hereinbefore described and illustrated in the drawings
hereunto annexed.

page_text: 4 In electrical apparatus for the purposes herein before set forth I claim the stamping
or forming-out of the body or substance of the metal spring piece c-b of the vibrating
tongue piece for holding the platina point substantially as and for the purposes
hereinbefore described and illustrated in the drawings hereunto annexed.
5. In electrical apparatus for the purposes hereinbefore set forth I claim curving
fluting corrugating or shaping the end a to b of the spring piece c-b thereby rendering
such part a to 6 inflexible and capable of carrying the hammer or other appliance
without itself vibrating substantially as and for the purposes hereinbefore described and
illustrated in the drawings hereunto annexed.
Dated this 24th day of January 1890.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C., Agents for the Patentee.