Year: 1898

page_text: Date of Application, 22nd Jan., 1898
Complete Specification Left, 14th Nov., 1898-Accepted, 17th Dec., 1898
ERNEST ALEXANDER CLAREMONT, 18, Cavendish Road, Chorlton-cum-Hardy, near
Manchester, in the County of Lancaster, Electrical Engineer, do hereby declare
the nature of this invention to be as follows:-
The object of this invention relates to a means of constructing a switch controlled
by an electro magnet, and so arranged that, on the electric current exceeding the
normal ammount the switch will released in any predetermined time. In order to inore
clearly describe this my said invention, and to show a method by which the same
might be applied I have annexed hereunto a diagramatic drawing in which A
represents the solenoid, B the iron or steel core, upon the end of which may be fixed
the piece C. On the lever D which is free to move on the pin E may be formed the.
catch F which prevents the lever G which may revolve on the pin H, from being
drawn away from the jaw I by the action of a spring J, which may be arranged as
shown one end being fixed to the stud K and the other to the lever G, the other
end of which may be formed into a handle, or arranged to be actuated by uicans
of a cord L. The lever G has fixed to it the pawl M which is free to move on the
The
pin N and actuates the index wheels forming a counter 0 in the usual manner.
lever P is free to move on the pin Q and may have fixed upon it the balance weight R
which may be moved either nearer to, or further away from the centre, in order to
more or less balance the iron core B. The end of the lever P may be attached to a
dash pot S-the retarding action of which may be due to compressed air, or liquid as
shown in the drawing-by means of a projecting piece T at the end of which may be
The plunger of the dash pot V
fixed the pin U on which the lever P is free to move.
may be attached to a link W which is free to move upon the fixed pin X. The
solenoid A may have attached to it an iron or steel sheath Y which may be fitted to
On
the top of the solenoid as shown or may be continued down round the outside.
the electric current being switched on the time switch is unaffected, and remains so
whilst the current continues normal. On the current somewhat exceeding the
normal the core B is gradually drawn into the solenoid A, the action of the
solenoid being assisted by the balance weight R pulling against the dash pot S
and so gradually raising the lever P, and after a time-the duration of which
may be determined by the position of the balance weight R on the lever P-the
piece C will come into contact with the lever D. A little previous to the piece C
coming into contact with the lever D, the end of the core B, which would then be
drawing near to the iron or steel sheath Y, is very strongly and rapidly attracted
thereto, thus suddenly raising the catch. F and allowing the contact between the
lever G and the jaw I to be suddenly broken by means of the spring J, this
movement causes the pawl M to move forward and engage with another tooth of

page_text: 'one of the wheels forming the counter O. If the current were to suddenly rise
much above the normal, say twice the amount, the core B would be instantaneously
drawn up into the solenoid with great force, and so instantly release the switch. As
soon as the current again reaches the normal, contact may easily be re-made by
drawing up into position the lever G by means of the cord L, or if the end of the
lever G is formed into a handle, by pushing the handle downwards. The various
portions of the switch would be electrically connected together by suitable conductors,
manner easily understood by persons conversant with apparatus of this
in a
description.
Dated this 18th day of January 1000
Automatic Win or out-out
ERNEST ALEXANDER CLAREMONT, Endsleigh, Legh Road, Knutsford, in the County
of Cheshire, late of 18, Cavendish Road, Chorlton-cum-Hardy, near Manchester,in
the County of Lancaster, Electrical Engineer, 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:-
The object of this invention relates to a means of constructing a switch controlled.
by an electro-magnet and so arranged that on the electric current exceeding the
normal amount. the switch will be released in any predetermined time, proportional
to the excess current. In order to more clearly describe this my said invention,
and to show a method by which the same might be applied I refer to the diagramatic
drawing left with the Provisional Specification.
On this drawing a represents the solenoid, 6 the iron or steel core, upon the
end of which may be fixed the piece c. On the lever d which is free to move on
the pine may be formed the catch f which prevents the lever g which may revolve
on the pin from being drawn away from the jaw i by the action of the spring j
which may be arranged as shown, one end being fixed to the stud k and the other
to the lever g the other end of which may be formed into a handle, or arranged to
be-actuated by means of a cord l.
The lever g has fixed to it the pawl m which is free to move on the pin n and
actuates the index wheels forming a counter o in the usual manner.
The lever p is free to move on the pin q and may have fixed upon it the balance
weight r which may be moved either nearer to, or further away from the centre,
in order to more or less balance the iron core b. The end of the lever p may be
attached to a dashpot 8-the retarding action of which may be due to compressed
air, or liquid as shown in the drawing by means of a projecting piece t at the end
of which may be fixed the pin u on which the lever p is free to move. The plunger
of the dash pot v may be attached to a link w which is free to move upon the fixed
pin x.
The solenoid a may have attached to it an iron or steel sheath y which may be
fitted to the top of the solenoid as shown or may be continued down round the
outside. On the electric current being switched on the automatic switch is
unaffected, and remains so whilst the current continues normal. On the current
somewhat exceeding the normal the core b is gradually drawn into the solenoid a the
action of the solenoid being assisted by the balance weight r pulling against the
dashpot & and so gradually raising the lever p and after a time-the duration of
which is dependent upon resistance of the dash pots and the excess current flowing
at the time the piece c will come into contact with the lever d. A little previous

page_text: to the piece c coming into contact with the lever the end of the core b which
would then be drawing near to the iron or steel sheath y, is very strongly and
rapidly attracted thereto, thus suddenly raising the catch f and allowing the contact
between the lever y and the jaw i to be suddenly broken by means of the spring j
this movement causes the paul m to move forward and engage with another tooth
of one of the wheels forming the counter o. If the current were to suddenly rise
much above the normal, say twice the amount, the core b would be instantaneously
drawn up into the solenoid with great force, and so instantly release the switch.
As soon as the current again reaches the normal, contact may easily be remade by
drawing up into position the lever g by means of the cord or if the end of the
lever is formed into a handle, by pushing the handle downwards. The various
portions of the switch would be electrically connected together by suitable conductors,
in a manner easily understood by persons conversant with apparatus of this
description.
The whole of the apparatus is mounted on a base of suitable insulating material
and can be protected by a metallic or other suitable casing.
I may remark that the duration of time after which the piece e comes into contact
with the lever d is not determinable by the position of the balance weight r on the lever p,
as erroneously stated in my Provisional Specification, but is dependent on the resistance
of the dashpot and the amount of current flowing at the time as stated in the Complete
Specification above, the function of the weight r being simply, according to its position,
to more or less balance the iron core b.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed I declare that what
I claim is:
An automatic switch or cut-out which is released in any predetermined time
should the current only slightly exceed the normal; and suddenly should the current
greatly exceed the normal; substantially as described and ascertained in the
foregoing statement.
Dated this the Twelfth day of November 1898.