Force or Current of Electric Currents and the Speed of Motors.
Year: 1885

page_text: Force or Current of Electric Currents and the Speed of
Motors.
We CHARLES JOHN BOSANQUET Bollingbroke Rectory Spilsby, WILLIAM
CAMERON, 6 Upper Gresham St. Lincoln, and WILLIAM AUGUSTUS TOMLINSON
Birthorpe Folkingham, Engineers, do hereby declare the nature of our invention
for IMPROVEMENTS IN APPLIANCES FOR REGULATING THE ELECTRO MOTIVE FORCE
OR CURRENT OF ELECTRIO CURRENTS & SPEED OF MOTORS, to be as follows:-
This invention relates to certain improvements connected with patent No. 4665
of March 1884 by Messrs. Bosanquet & Tomlinson for apparatus for electrically
controlling and regulating the speed of motors employed for driving dynamo
electric machines, and patent No. 12096 of 1885. by Messrs. Bosanquet Cameron &
Tomlinson for electrically controlling the electro motive force or current of electric
currents & speed of motors.
In drawing of specification 4465/84 we shew the lever K the fulcrum of which
may be upon the valve spindle or so connected that a similar motion to that of the
valve spindle is communicated to it so that the valve in changing its position
breaks contact between lever K and either of the contacts L or M as the case may
be releasing gearing before the valve has travelled too far. According to our
present invention we introduce a differential gear so as to maintain the lever K in
mean position between the contact points L and M whatever the position of the
throttle valve when the current is at the normal in addition to preventing the
valve from travelling too far. To attain this the contact points instead of being
fixed are carried by a second lever one end of which also receives a movement
from the throttle valve spindle. By the throttle valve spindle above mentioned is
meant any connection between the governor and the regulating part of the motor
on which the governor acts. In a modification of this arrangement the current
used for the magnets is taken through resistance coils, and other contacts points
are added on which the contact lever, used for distributing the current, rests when
the current is at the normal shunting the current instead of breaking the circuit.
Dated this 11th day of Danamber 1885
CHAS J. BOSANQUET.
W. CAMERON.
W. A. TOMLINSON,

page_text: Improvements in Appliances for Regulating the Electro Motive
Force or Current of Electric Currents and the Speed of
Motors.
CHARLES JOHN BOSANQUET 20 Kesteven St Lincoln, WILLIAM CAMERON, Lincoln
& WILLIAM AUGUSTUS TOMLINSON Birthorpe Folkingham Engineers do hereby
declare the nature of our invention for IMPROVEMENTS IN APPLIANCES FOR
REGULATING THE ELECTRO MOTIVE FORCE OR CURRENT OF ELECTRIC CURRENTS
AND THE SPEED OF MOTORS, 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 certain improvements connected with the inventions
No. 4665/84 by Bosanquet and Tomlinson for apparatus for electrically controlling
the speed of motors driving dynamo machines and No. 12096/85 by Bosanquet,
Cameron and Tomlinson for electrically controlling the electro motive force or
current of electric currents and the speed of motors.
In drawing of Specification No. 4665/84 we show a lever K the fulcrum of
which may be upon the valve spindle or so connected that it has a similar motion
to that of the valve spindle communicated to it so that the valve in changing its
position breaks contact between lever K & either of the contacts L or M as the
case may be releasing the gearing before the valve has travelled too far.
According to our present invention we introduce a differential gear to maintain
the lever K in the mean position between the contact points L and M whatever is
the position of the throttle valve spindle when the current is at the normal.
To attain this the contacts instead of being fixed are carried by a second lever
which also receives a movement from the throttle valve spindle. By the throttle
valve spindle above mentioned is meant any connection between the governor and
regulating part or which the governor is to act. In a modification of this arrange-
ment the current used for the magnets is taken through resistance coils and other
contacts are added on which the contact lever used for distributing the current
rests when the current is at the normal shunting the current instead of breaking
the circuit.
By means of this differential gear the throttle valve is as sensible of every
variation of current as if the solenoid were directly connected to it while the
power of the solenoid to move the regulator valve is magnified to an almost
indefinite extent.
In order that our invention may be more readily understood and carried into
practice we describe the accompanying drawings.
Figs. 1 & 2 are a side and end elevation of the differential gear on a governor
used for regulating motors brushes of dynamo machines or resistances. Fig. 3 is
a modification of the differential gear.
In Fig. 1. a is the core of the solenoid b and acts directly upon lever c (whose
fulcrtim is at d when lever c is actuated by the solenoid) which is coupled to
the contact maker e fulcrumed on link fand held upon point g by the spring h
when the current is at the normal. The contact points gjk are carried upon the
lever / having a fixed fulcrum m and receiving motion from the worm n when the

page_text: governor is brought into action by the solenoid core a moving lever c and throwing
e into contact with points ; or k as the case may be. One terminal of each
magnet and is connected to points ; and k respectively the others being con-
nected to the negative lead of the circuit. The contact maker e is connected to
the positive lead. The wheel o is driven from any convenient source rotating the
wheels p and q in opposite directions.
Upon the electro motive force or current rising in the coils of the solenoid 6 the
core a is drawn down putting e in contact with k this completes the circuit of
magnet attracting the armature a throwing clutch into gear with wheel which
rotates the spindler and worm n to close the valve simultaneously the action of
the worm n upon the lever tends to break the circuit of the magnet releasing the
gearing before the solenoid would in returning to its mean position Also the
combined action of levers and solenoid in returning to its mean position is to
bring the contact e practically equidistant from points i and k. Where desirable
the contact point g is connected to resistances through which the current ased
for the magnets passes when not in use for either magnet,
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is――
1st. The system of levers forming a differential gear upon which are contacts
for distributing the current in electric circuits. Part of the system receiving
a motion from a solenoid or other electrical device which completes a circuit the
second motion tending to break the circuit being received from the gear under
control of said solenoid.
2nd. The combination as in claim 1 with the contact maker resting on a third
contact point when in mean position to shunt the current through resistances
instead of breaking the circuit.