Improved Telegraphic Relay.
Year: 1890

page_text: Date of Application, 17th Sept., 1890
Complete Specification Left, 17th June, 1891-Accepted, 18th July., 1891
PROVISIONAL SPECIFICATION.
Improved Telegraphic Relay.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by John Martin Treber, of Louisville, Kentucky,
U.S.A. Inventor,) to be as follows:-
This invention relates to improvements in telegraphic relays; and the object is
to render the operation thereof extremely sensitive, while at the same time retaining
a very simple construction.
Heretofore a telegraphic relay has been constructed with a pair of fixed magnets
and a pair of magnets over them carried by one arm of a weighted lever, said arm
vibrating between a stop and a contact-piece; but in this invention I simplify this
construction and avoid any unbalancing of the magnetic circuit.
This invention consists in the construction and combination of parts, as herein-
after described, and pointed out in the claims.
The base-board has near one end two brackets, which support the lower
horizontal magnet by means of its core, the brackets forming the poles of said
magnet.
A T-shaped post carries at its upper outer ends bearings for the fulcrum-pins of
the armature lever. This lever has an adjustable weight on its long arm and a
yoke at its outer end, carrying the pole-pieces, which are secured to the core of the
upper magnet. Near the end of the long arm of the lever a contact-post is secured
to the base-board, and has a horizontal block of insulating material, at its upper
end. This block is reces ed to form a seat for the end of lever and carries the
contact-spring. At the upper end of the post is a contact-pin, said pin and post
being insulated from an inclosing-tube.
Four binding-screws for the circuit-terminals are provided, and near the bracket
are two more binding-screws.
Connections are made in such a manner that when the current in the operating-
circuit is made and broken the armature-lever is vibrated to make and break the
local circuit. A second local circuit is formed by the connection from the contact-
pin to one of the screws, and from thence through a second sounder or other
translating device to the wire leading to the local battery and spring. Additional
circuits might be controlled by placing springs or contact-points on both sides of
the armature-lever at proper points to engage circuit-terminals.
The upper magnet besides being in itself an electro-magnet excited by the same
main current which excites the lower magnet is also the armature, the north pole
of the upper magnet being opposite the south pole of the lower magnets and the
south-pole of the former being opposite the north pole of the latter. The two
magnets, which are substantially equal in power, have an equal attraction for each
other, and the device is therefore extremely sensitive.
A weight serves to adjust the tension of the armature by being set at different
positions of the longer arm of the lever.
The vibrations of the lever by the main current exciting the two single magnets
causes an alternate make and break of the two local circuits, one circuit being
made through the armature-lever and contact-spring, and the other through the
spring and contact-pin, the two circuits including, respectively, the translating
devices, and both circuits including the same local battery.
J. P. BAYLY,
Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Telegraphic Relay.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by John Martin Treber, of Louisville, Kentucky,
U.S.A. Inventor,) 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 improvements in telegraphic relays; and my object is
to render the operation thereof extremely sensitive, while at the same time retaining
a very simple construction.
Heretofore a telegraphic relay has been constructed with a pair of fixed magnets
and a pair of magnets over them carried by one arm of a weighted lever, said arm
vibrating between the stop and a contact-piece; but in my invention I simplify
this construction and avoid any unbalancing of the magnetic circuit.
My invention consists in the construction and combination of parts, as hereinafter
described, and pointed out in the claims.
In the accompanying drawings,
Figure 1 is a side elevation of my complete relay, the contact-post being in
section.
Fig. 2 is a plan of the same.
Fig. 3 is an end elevation from the left of Fig. 1, and
Fig. 4 is a diagrammatic view showing the circuits and the relay in outline.
A indicates the base-board, having near one end two brackets b, which support
the lower horizontal magnet B by means of its core, the brackets forming the poles
of said magnet.
D. indicates a T-shaped post carrying at its upper outer ends bearings d for the
fulcrum-pins e of the armature-lever E. This lever has an adjustable weight e¹ on
its long arm and a yoke e² at its outer end, carrying the pole pieces c, which are
secured to the core of the upper magnet C. Near the end of the long arm of the
lever a contact-post F is secured to the base-board, and has a horizontal block f, of
insulating material, at its upper end. This block is recessed to form a seat f¹ for
the end of the lever E and carries the contact-spring G. At the upper end of
post F is a contact-pin H, said pin and post being insulated from an inclosing-tube.
Four binding-screws for the circuit-terminals are shown at 1, 2, 3, and 4, and
near the bracket bare shown two more binding screws, 5 and 6. Connections are
made as follows: From screw 1 to lower magnet B, from B to screw 6, from
screw 6 to upper magnet C, from C to screw 5, (the two latter connections being
coiled around the pivot-pins e of the lever, as shown in Fig. 2, to avoid interference
with the free movements of said lever,) and from screw 5 to screw 2, the terminals
of the main or operating circuit being attached at 1 and 2. From screw 3 connec-
tion is led to the T-post D, which supports the lever, and from the contact-spring G
to screw 3 through a local battery I and through a sounder or other local trans-
lating device x. The current in this circuit may pass from post D to lever E
through the fulcrum pins thereof or through a small flexible connection. (Shown
at e³.)
It will now be seen that when the current in the operating-circuit is made and
broken the armature-lever is vibrated to make and break the local circuit, as more
fully hereinafter referred to. A second local circuit is formed by the connection
from the contact-pin H. to the screw 4, and from screw 4 through a second sounder
or other translating device y to the wire leading to local battery I and spring G.
Additional circuits might be controlled by placing springs or contact-points on both
sides of the armature-lever at proper points to engage circuit-terminals.
The upper magnet C, besides being in itself an electro-magnet excited by the
same main current which excites magnet B, is also the armature, the north pole of

page_text: magnet. C being opposite the south pole of magnet B and the south pole of th
former being opposite the north pole of the latter. The two magnets, which are
substantially equal in power, have an equal attraction for each other, and the device
is therefore extremely sensitive.
The weight e serves to adjust the tension of the armature by being set at
different positions of the longer arm of the lever.
The vibrations of the lever by the main current exciting the two single magnets
causes an alternate make and break of the two local circuits, one circuit being made
through the armature-lever and contact-spring G and the other through spring G
and contact-pin H, the two circuits including, respectively, the translating
devices x and y, and both circuits including the same local battery I.
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 a relay, the combination, with a horizontal single magnet having the
upwardly projecting poles, of a lever having its contact-point at one end and a yoke
at the other end, a horizontal single magnet carried by said yoke and having its
poles adjacent to the poles of the first-mentioned magnet, a main circuit including
the said magnets, and a plurality of local circuits operated by the contact end of
the lever, substantially as described.
2. In a relay, the combination, with a stationary magnet, of an armature-magnet
carried at one end of a lever, a contact-spring above the other end of the lever, a
contact-pin beyond the end of the lever and under the spring, a main circuit
including the said magnets, a connection from a battery to the spring, and branch
connections from the battery to the lever and to the contact-pin, said branches
including translating-devices, whereby the vibrations of the armature-lever will
alternately operate two local circuits, substantially as described.
3. In a relay, a single magnet having its pole-pieces in the form of two brackets,
the feet of the brackets being secured to the base out of the vertical plane of the
magnet, whereby the magnet mbe located close to the base, and the said pole-
pieces serve the double function of influencing the armature and securing the same
in position.
Dated the 17th day of June 1801
J. P. BAYLY,
Applicant.