Improvements in Methods and Means of Electric Ignition for Explosion Motors.
Year: 1898

page_text: Date of Application, 8th Dec., 1898-Accepted, 11th Feb., 1899
COMPLETE SPECIFICATION.
\ Improvements in Methods and Means of Electric Ignition for
Explosion Motors.
I, PHILIPPE PICILARD, of 80, Rue Parmentier, St. Etienne, in the Republic
of France, 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:--
This invention relates to a method of electrical ignition for explosion motors
which is very simple and does away with the vibration of the induction coil and
operates in an absolutely certain manner whatever be the speed of the motor.
In the annexed drawing;-Fig. 1 is a front view and Fig. 2 a vertical section
of the apparatus. On one of the ends of the motor shaft a¹ a toothed pinion s
mounted which engages with a wheel 6 double the diameter of the same this
wheel bis keyed on a sleeve c mounted freely on a fixed axle c¹ which carries at
one end a bordered disk d the border of which is provided with an opening
arranged to receive the bevelled finger of a lever e articulated on a fixed axle el
and under the action of a spring e and carrying an elastic plate this plate
has at its upper extremity a contact point e arranged to operate in conjunction
with a fixed screw f in electrical communication with a terminal screw n in the
circuit of the induction coil also the axle e' is connected with a terminal screw p
of the circuit.
When the motor is in operation the shaft a¹ revolves together with the pinion a
which communicates the rotary movement by the wheel b and sleeve c to disk d:
the finger of the lever e is kept by the spring e on the interior face of the
bordered disk d and the contact 3 is apart from the screw f. But when the
opening d meets the finger of the lever e the spring e instantly draws the lever e
to the left (Fig. 1) at the same time the plate e is moved to the right and the
contact meets the screw f; at this moment the circuit of the induction coil
is closed and the spark is produced between the lighting points and causes the
explosion of the gas mixture in the cylinder. This explosion is-only produced
once in each two revolutions of motors of the four time principle it is for this
reason the wheel 6 has twice the diameter of the pinion a so that the disk makes
one revolution whilst the motor shaft a¹ makes two. The same mechanism is
equally convenient for motors of the two time principle by dispensing with the
pinion a and. keying the disk d directly onto the motor shaft a'.
A suitable
The axle e and the contact screw f are arranged in a plate h of insulating
material such as ebonite or the like which plate is mounted freely on a sleeve
cast in one with the motor frame and serving as a cushion or outer bearing to
the sleeve c; all the parts of the mechanism are enclosed by a cover i secured on
the plate h by means of screws or the like kk provided with fly nuts.
abutment limits the movement of the lever e. On the plate ha connection
is exteriorly mounted and by means of which and a suitable rod or crank the
plate together with the parts fixed to it can be turned by the hand in such a
manner as to accelerate or retard the explosion so as to increase or decrease the
speed of the motor as required.

page_text: Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The method and means of electric ignition for explosion motors in which a
pivoted lever bears with its finger on the interior face of the raised circular
border of a rotary disk which border is provided with an opening in which the
finger of the lever periodically engages being drawn therein by the action of a
spring by which means the lever is so moved together with an elastic plate
fixed to the same that a contact of this plate is brought into connection with a
fixed contact and the circuit of the induction coil is closed without vibration for
producing the spark between the explosion points.
2. The combination with the devices in Claim 1 of a plate for carrying the said
devices the said plate being of insulating material mounted freely on a sleeve
serving as a cushion or outer bearing to the sleeve of the disk which plate can
be turned round by hand so as to accelerate or retard the explosion.
Dated this 8th day of December 1898.
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, London.