An Electric Contact Maker for Ringing Electric Bells and for other purposes.
Year: 1890

page_text: Date of Application, 7th Aug., 1890
Complete Specification Left, 22nd Apr., 1891-Accepted, 23rd May, 1891
PROVISIONAL SPECIFICATION.
An Electric Contact Maker for Ringing Electric Bells and for
other purposes.
I ARTHUR HENRY BAGNOLD a Brevet Major and Captain in Her Majesty's
Royal Engineers stationed at Chatham and residing at Borstal Cottage Rochester
Kent, England, do hereby declare the nature of this invention to be as
follows:-
A metallic ring or a plate perforated with a circular hole is attached to an
insulating base. Through the centre of this ring and at right angles to the plane
of the ring passes a metallic rod fastened at one end to the before mentioned base.
The rod is kept normally in its place in the centre of the ring either by its own
rigidity by suitable springs and fastenings or by the force of gravity in which
last case its fastening to the insulated base is of the nature of a suspension. The
conductors are connected respectively to the rod and to the ring. Contact is made
by deflecting the rod until it touches the ring. The contact maker acts both as a
push and as a pull.
Dated this Sixth day of August 1890.
ARTHUR H. BAGNOLD,
Capt. R.E. and Major.
COMPLETE SPECIFICATION.
An Electric Contact Maker for Ringing Electric Bells and for
other purposes.
I, ARTHUR HENRY BAGNOLD, a Brevet Major and Captain in Her Majesty's
Royal Engineers, stationed at Chatham and residing at Borstal Cottage, Rochester,
Kent, England, 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 :-
My invention relates to a simple and inexpensive construction of contact maker
such as may be used for ringing electric bells and like purposes, this contact maker
being especially suitable for intermittent action in making and breaking contact as
I shall describe with reference to the accompanying drawings.
Fig. is a front view with cover removed and Fig. 2 is a vertical section of a
cased in contact maker according to my invention.
Fig. 3 is a front view and Fig. 4 a vertical section of a modification in which
the casing is dispensed with.
Referring to Figs. 1 and 2, a metal ring A. is fixed to a base B of insulating
material and on the ring A is fixed a cover C. Into a bracket D fixed on the
base is fixed the end of an elastic metal rod E which passes through a hole
of the ring A of larger diameter than the rod itself and terminates in an external
button F.
Two conducting wires G, H are connected, the one to the ring A, the other
to the bracket D. On moving the button F so as to bend the rod E bringing it in
contact with the side of the hole in A through which it passes, the circuit of the
conductors G H is closed, and when the rod E is relieved from strain it leaves
contact with the side of the hole and the circuit is thus opened.
As shown in Figs. 3 and 4 a bracket A' is substituted for the ring A. above
described and the cover C is dispensed with.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An electric contact maker consisting of an elastic metal rod to which one con-
ductor is connected, this rod passing through a hole larger than itself in a metal
ring or bracket to which another conductor is connected, so that circuit is closed
by bending the rod to touch the side of the hole, and circuit is opened by leaving
the rod free, substantially as described.
Dated this 22nd day of April 1891.
ABEL & IMRAY,
Agents for the Applicant.