Bells or for other Purposes.
Year: 1885

page_text: Bells or for other Purposes.
I GEORGE ALANSON MASON of 109 Farringdon Road in the County of Middlesex
Engineer do hereby declare the nature of my said Invention for "IMPROVEMENTS.
IN SHUNTS OR CONTACT VARIERS OR AUTOMATIC CUTOUTS OR SHORT CIRCUITERS
FOR MAGNETO CALL OR SIGNALLING BELLS OR FOR OTHER PURPOSES.'
"
My Invention has for its object to provide a simple and efficient arrangement for
varying the contact for diverting the passage of a current of electricity as required
the said arrangement being more especially applicable for use with magneto
signalling or call bells but being applicable to other purposes where a shunt or
circuit, varier or automatic cut out or short circuiter is required.
According to my Invention I actuate the armature of the magneto electric
generator by means of a shaft and a crank handle in the ordinary way but
I connect the crank handle to the shaft so that it has a movement of rotation
imparted to it independently of the shaft until a spring is removed from the short
circuiting contact which it made when the parts were in their normal position and
so that when the crank is operated it throws the armature into the circuit and
maintains it in circuit whilst the crank is rotated but as soon as the crank handle
is released the said spring or contact piece automatically returns to its original
position to short circuit or cut out the coils of the magneto armature. I effect this
by means of a spring contact strip bent into a bowed form and attached at one end
to the shaft and at the other end to the collar of the crank handle the attachment
to the shaft being preferably effected by a post rising through a slot in the said
collar so that the said post serves as a stop the slot allowing the necessary move-
ment of the crank handle to contract the spring and remove it from its short
circuiting contact which short circuiting contact is preferably made by a collar piece
surrounding the path through which the spring contact piece travels as the crank
handle is rotated so that in whatever position the crank handle is left after it is
released, the spring on automatically expanding will bear upon some portion of the
said collar.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said George Alanson Mason,

page_text: improvements
Hunts or
Contact variers, or Automatio
Cutouts or Short Circuiters for Magneto Call or Signalling
Bells or for other Purposes.
I GEORGE ALLANSON MASON of 109 Farringdon Road in the County of
Middlesex Engineer do hereby declare the nature of my invention for IMPROVE-
MENTS IN SHUNTS OR CONTACT VARIERS OR AUTOMATIC CUT OUTS OR SHORT
CIRCUTERS FOR MAGNETO CALL OR SIGNALLING BELLS OR FOR OTHER PURPOSES
and in what manner the same is to be performed, to be particularly described. and
ascertained in and by the following statement :-
My Invention has for its object to provide a simple and efficient arrangement for
varying the contact for diverting the passage of a current of electricity as required
the said arrangement being more especially applicable for use with magneto,
signalling or call' bells but being also applicable to other purposes where a shunt or
circuit varier or automatic cut out or short circuiter is required.
According to my Invention I actuate the armature of the magneto electric
Generator by means of a shaft and a Crank handle in the ordinary way but
I connect the crank handle to the shaft so that when first operated it has a move-
ment of rotation imparted to it independently of the shaft sufficient to cause
a spring to be removed from the short circuiting contact which it made when the
parts were in their normal position and so that when the crank is operated it
throws the armature into the circuit and maintains it in circuit whilst the crank is
rotated but as soon as the crank handle is released the said spring or contact piece
automatically returns to its original position to short circuit or cut out the coils of
the magneto armature. I effect this by means of a spring contact strip of a bowed
form and attached at one end to the shaft and at the other end to the collar of the
crank handle the attachment to the shaft being preferably effected by a post rising
through a slot in the said collar so that the said post serves as a stop the slot
allowing the necessary movement of the crank handle to contract the spring and
remove it from its short circuiting contact which short circuiting contact is
preferably made by a collar piece surrounding the path through which the spring
contact piece travels as the crank handle is rotated so that in whatever position the
crank handle is left after it is released the spring on automatically expanding will
bear upon some portion of the said collar.
Figures 1 and 2 are views at right angles to each other of mechanism constructed
according to my Invention. Figure 2 shews the device in its position for making
one contact or short circuiting and Figure 3 shews the position when this contact is
withdrawn for shunting the current in the required direction. A is a shaft
mounted in a casing or support B and C is a crank handle and D is a band or gear
wheel on the said shaft. These may be of the ordinary kind but the crank handle
is connected to the shaft by a pin or post a on the shaft passing through a slot d²
in the collar d of the handle so that when the handle is operated it moves for a part
of a revolution without turning the shaft A until the end of the slot d³ comes

page_text: against the post a. A spring strip E is secured at one end to the post a and at its
other end to the collar d. When the parts are in their normal position as shewn in
Figure 2 the said spring strip E bears upon a ring f of metal forming a lining to
the box or bearing in which the shaft A is mounted or otherwise surrounding the
part at which the spring strip E is situated When the spring strip E bears on this
ring f the required circuit for the current during the time the handle is not operated
is completed say for example a short circuit past the coils of the armature of the
magneto machine by which a current is generated when the handle is rotated.
On the handle being rotated the slot d³ first allows the collar d to move round
on the shaft A for a short distance sufficient to contract the spring strip E and
withdraw it from contact with the ring fthus breaking the circuit before completed
and compelling the current to pass through any other necessary course say through
the coils of the armature of the magneto machine. When the end of the slot d²
comes against the post a as shewn in Figure 3 the handle C and shaft A rotate
together to divert the current or cause the generation of the current in the usual
way. When the handle is released the spring strip E automatically returns to its
normal position and completes the short or other circuit through the ring f.
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
1st In shunts or the like for diverting electric currents the combination of the
operating shaft A handle or crank C and spring E so connected with the shaft and
crank or handle that the crank or handle moves independently of the shaft for
a distance to withdraw the spring E from the contact which it previously made
substantially as herein before described and illustrated.
2nd In shunts or the like for diverting electric currents the combination of the
shaft A post or pin a handle or crank C with slotted collar d and spring E connected
at one end to the post a and at the other end to the collar d substantially as and
for the purpose herein before described and illustrated.
3rd In shunts or the like for diverting electric currents the combination of
a shaft A bandle or crank C and spring E connected at one end with the handle or
crank and at the other to the shaft and a ring f forming the contact for one of the
circuits substantially as herein before described and illustrated.
Davou vins second day or
Witnesses,
B. REHFNESS.
F. BILTON.
peptember 1885.
GEORGE A. MASON.