AN IMPROVED TELEGRAPH RELAY
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Julius Ebel at the Office
of the Commissioners of Patents on the 15th March 1882.
JULIUS EBEL of New Charlton in the County of Kent, Telegraph Engineer.
"AN IMPROVED TELEGRAPH RELAY
"
My invention relates to an improved telegraph relay, and has for its object to so
construct such a relay, that it will be very simple, and extremely sensitive, and
will cost but little to manufacture.
In carrying the said invention into practice I employ an Electro Magnet, with
one bobbin of insulated wire, within which I place a compound soft iron core. The
centre part of this soft iron core, moves freely on pivots, and is prolonged on both
ends in the form of tongues or armatures. Adjacent to each of the said upper and
lower armatures, I arrange steel horse-shoe magnets which are so placed with
regard to the said armatures, that the same can move to and fro, or vibrate between
their poles. It follows from the above described construction of the relay that if
a weak or feeble current is produced in the wire bobbin it will magnetize and
induce magnetism in the iron centre core and armatures and will consequently
according to their polarity, be attracted, or repulsed, by the poles of the magnets.
To limit the throw or movement of the aforesaid armatures, I preferably attach
to the upper armature, a metal arm or piece, whose vibrating movement is controlled
or limited by two adjusting screws.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Julius Ebel in the Great Seal Patent Office on the 15th September
1882.
JULIUS Ebel of New Charlton in the County of Kent, Telegraph Engineer,
"AN IMPROVED TELEGRAPH RELAY."
My invention relates to an improved telegraph relay and has for its object to so
construct such a relay that it will.be very simple and extremely sensitive, and will
cost but little to manufacture.
The said invention is illustrated in the accompanying drawing in which
Figure 1 is a plan or top view and
Figure 2 an elevation of my improved relay.
Figure 3 is a vertical section of the said relay on the line x, x, Figure 1.
Like letters indicate the same parts in all of these Figures.
In carrying the said invention into practice I employ an electro magnet or
solenoid a, surrounded by insulated wire, within which I place a compound soft
iron core consisting of a tube b in the centre of which I arrange a rod or bar c
adapted to oscillate freely upon pivots c' suitably journalled or supported in plates
or pieces on the ends of the tube b.
· Upon the aforesaid rod or bar c I form extensions or prolongations c². c. which
constitute armatures one at each end of the said rod or bar. Adjacent to each of
these armatures I arrange a permanent horse shoe magnet as at f. These magnets
are so arranged with respect to the said armatures that the same can vibrate to and
fro between the poles of the said magnets. The said magnets are preferably pivoted
at g. and are connected by rods h of non-magnetic material. These rods extend
through segmental slots in the plates d, e; In combination with one of the said
rods I arrange an adjusting screw i and I attach to the other rod springs ; which
tend to constantly draw the magnets f in one direction.-It follows therefore that
by the adjustment of the said screw i, I am enabled to vary the positions of the
two poles of the magnets f, relative to the armatures c² c³.
By reason of the above described construction of relay it follows that if a weak
or feeble current is produced in or transmitted through the wire on the solenoid
bobbin or magnet a it will magnetise and induce magnetism in the iron compound
core consisting of the parts b, c, and c² and c³, and the said armatures c² c³, will
according to their polarity be attracted or repelled by the poles of the magnets f.
To limit the throw or movement of the armatures c³ ³ I preferably attach to or
form on the armature c² a metal arm or piece c, adapted to oscillate between two
insulated contact screws k, k, supported on the plate d.
The aforesaid centre core c can be made of extreme lightness, so as to enable the
relay to be worked by feeble currents.
Having thus described the nature of my invention and shewn how the same
may be conveniently and advantageously carried into practice I wish it understood
that I claim
The improved telegraph relay constructed substantially as herein set forth.
In witness whereof I the said Julius Ebel have hereunto set my hand and
seal this Fifteenth day of September in the year of Our Lord One thousand
eight hundred and eighty two.