IMPROVEMENTS IN "ELECTRIC BELLS
Year: 1885

page_text: I HENRY BURRELL PORTER, residing at 12, Prospect Street, Bridgeport, in the
County of Fairfield and State of Connecticut, in the United States of America,
gentleman, do hereby declare the nature of my invention for IMPROVEMENTS
IN "ELECTRIC BELLS" and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My invention relates to certain novel and useful improvements in Electric Bells,
and has for its object to improve on the construction shown in United States
Patents No 214261, and 201172 granted to me April 15, 1879, and July 18, 1882,
respectively and with these ends in view my invention consists in the details of
construction and combination of elements hereinafter fully explained and then
specifically designated by the claims.
In order that those skilled in the art to which my invention appertains may
more fully understand its construction and operation I will proceed to describe the
same in detail referring by letter to the accompanying drawings forming a part of
this specification in which Fig 1 is a side elevation of my improvement with tho
bell broken away.
Fig, 2 a plan view with the bell removed.
Fig, 3 a bottom view and
Fig, 4 an end view.
Similar letters denote like parts in the several figures of the drawing.
I will not enter into any detailed description of the helix and the relation of the
armature to the poles thereof, as this is fully described in my previously
mentioned patents and moreover forms no part of my present invention.
A is the. helix and B C the poles of the magnets. The helix is set within a
frame D and secured thereto by a yoke E embracing said helix and fastened to
the frame by means of screws F or in any other suitable manner.
G is a post which projects upwardly from the top of the yoke, being cast
integral therewith This post has a screw hole in its end and the bell H is secured
thereto by means of screw I as seen at Fig. 1.
Jare lugs depending from the bottom of the frame (see Figs 1 and 3) and
between them is pivoted the armature K by means of screws L. This armature
is U shaped and its arms extend upward in a vertical plane so as to be in
proximity to the poles B C in order to be attracted thereto. M is a circuit breaker
which I preferably make flexible and attach in any suitable way to the armature K

page_text: N is a lug which is cast integral with the frame and extends upwardly therefrom.
O is a screw which is passed through said lug, and is insulated therefrom by hard
rubber disks P. Q is a washer of copper or other conducting material placed
between the outside disk and the screw.
The normal position of the circuit breaker M is in contact with the inner end or
point R of the screw. S is a thin flat spring secured at one extremity to the
armature the other or free end bearing against the frame; the function of this
spring is to return the armature to its normal position after the circuit has been
broken and thereby insure contact between point R and circuit breaker M. Tis
the bell hammer which is formed integral with or secured to the upper extremity
of one of the arms of the armature.
U is an ordinary binding post which is in contact with the frame and V is a
similar post insulated from the frame by hard rubber disks W. X is a conducting
wire connected to the bottom of the post V and extending within the helix and Y
is also a conducting wire, one extremity of which is secured in contact with the
screw O the other end being connected within the helix.
The operation of my invention is as follows:-The battery wires are attached to
the posts UV. The current passes through the conductor X into the helix thence
through the conductor Y into the screw O into the circuit breaker, down through
the armature into the frame and thence through the post U when the circuit is
complete.
The magnetization being now effected the armature is attracted by the magnet
and the circuit thereby broken.
I am of course aware that the details of operation above set forth are broadly
old, but the special arrangement of the several parts of the device illustrated is
believed to be novel and an electric bell is thereby provided which is not only very
compact and convenient but also complete in every respect and moreover_very
economical in cost.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
.
1. In an electric bell, a single helix secured to the frame by a yoke having
attached thereto or formed integral therewith an upright post to which the bell is
secured, substantially as set forth.
2. In an electric bell, the U shaped armature pivoted to the frame in a vertical
plane and having attached thereto a flexible circuit breaker and a spring adapted
to return said armature to its normal position, in combination with the single
helix secured to the frame by a yoke having an upwardly projecting post adapted
to support the bell and the point of contact insulated from the frame and passed
through a lug projecting upwardly therefrom substantially as shown and
described.
11
00 1 7
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100K