Year: 1887

page_text: Date of Application, 29th Sept., 1887
Complete Left, 22nd June, 1888
Complete. Accepted, 27th July, 1888
We ARTHUR MORLEY and HUBERT WILBERFORCE WILSON, both of Rocliffe Street
Islington in the County of Middlesex, Electrical Engineers do hereby declare the
nature of this invention to be as follows:
By this our invention we improve, simplify and cheapen the construction of indi-
cators for electric bells and specially avoid the expense of a separate core, iron and
wood bobbin or other special means for insulation.
The core for the electro-magnet is made of malleable cast iron in one casting with
a foot or angle bracket for fixing it in place and with a taper flange at each end of the
core; it is also formed with a lug or flange for affixing a spring for carrying the
armature. This casting is japanned, which serves for insulation. The core part is
wound with silk covered wire.
""
The armature is connected to the lug or flange on the casting by means of a spring,
say of steel or German silver, and which may be straight or curved and arranged to
raise the armature about an eighth of an inch off the casting. The armature when
attracted is about parallel with the axis of the core which is fixed in a horizontal
position. We combine with the armature an indicator say of usual disc or "flag"
form and at one end of a double armed lever where it has a notch that catches
over a peg on the armature, the fulcrum screw for the lever being at the end of the
core and bracket casting and the other arm of the lever having an eye with a half
twist. This eye will serve for connecting it to a re-setting bar or rod. As the keeper
is attracted the flag is released from the peg and drops by its own weight until
stopped by a stop thereon, coming in contact with a part of or projection on the
casting.
We convert the above described drop lock indicator into a pendulous one by fixing
the core in a nearly upright position and attaching the twist eye end of the aforesaid
flag lever to the outer side of the lower end of the armature.

page_text: We, ARTHUR MORLEY and HUBERT WILBERFORCE WILSON, both of Rocliffe Street,
Islington, in the County of Middlesex, Electrical Engineers, 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 :-
-
By this our invention we improve simplify and cheapen the construction of indicators
for electric bells and specially avoid the expense of a separate core iron and wood
bobbin or other special means for insulation.
The core for the electro magnet is made of annealed cast iron in one casting with a
foot or angle bracket for fixing it in place and with a taper flange at each end of tho
core it is also formed with a lug or flange for affixing a spring for carrying the
armature. This casting is japanned which serves for insulation. The core part is
wound with silk covered wire.
The armature is connected to the lug or flange on the casting by means of a
spring, say of steel or German silver, and which may be straight or curved and
arranged to raise the armature about an eighth of an inch off the casting. Or the
armature may form the spring. The armature when attracted is about parallel with
the axis of the core which is fixed in a horizontal position. We combine with the
armature an indicator.say of usual disc or "flag" form and at one end of a double
armed lever where it has a notch that catches over a peg on the armature, the
fulcrum screw for the lever being at the end of the core and bracket casting. As the
keeper is attracted the flag is released from the peg and drops by its own weight until
stopped by a stop thereon coming in contact with a part of the armature.
We convert the above described drop lock indicator into a pendulous one by fixing
the core in a nearly upright position and attaching the end of the aforesaid flag
lever to the outer side of the lower end of the armature.
Figure 1 is a front view and figure 2 an end view of an indicator constructed
according to this invention. The soft cast iron core A is in one casting with a foot
or angle bracket A' for fixing it in place and with a taper flange A' at each end of
the core, it is also formed with a lug or flange A³ for affixing a spring B which forms.
the armature. The castings A A A² A³ is japanned which serves for insulation.
The core part A is wound with silk covered wire. The spring armature is arranged
to stand off about inch from the core and is when attracted about parallel with the
axis of the core which is fixed in the horizontal position. C is an indicator in the
usual form of a double armed lever with flag at one end. The "flag" has a
notch c that catches over a peg 6 on the spring armature B, the fulcrum screw for
the lever C being at the end of the casting A A A². The other end of the arm may
be formed with an eye for connecting it to a re-setting bar or rod. As the keeper C
is attracted the flag C¹ is released from the peg 6 and drops by its own weight until
stopped by a stop c¹ thereon coming in contact with the keeper C.

page_text: Figure 3 is a front view and figure 4 a vertical cross section of practically the
same indicator converted into a pendulous one the core A being fixed in a nearly
upright position, and the end or arm of the lever C being twisted and having a
hole for attaching it to the lower end of the armature spring *.
The advantages of this invention are simplicity and economy in the shape of the
casting doing away with the expense of a cove iron, and being japanned does not
require either a wooden bobbin or any other means of insulation. Practically the
same instrument is also applicable both as a mechanical drop lock indicator and a
pendulum movement indicator.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
First. An indicator for electric bells consisting essentially of an electromagnet of soft
cast iron japanned for insulation wound with covered wire and formed suitable for
fixing and for attachment thereto of a spring armature or a spring with armature and
of a "flag" substantially as set forth.
Second. The construction of indicator described with reference to the drawing.
Dated this 22nd day of June 1888.
ARTHUR MORLEY.
HUBERT WILBERFORCE WILSON.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.