FIELD OF THE INVENTION
The invention relates to the development of an interlocking circuit of
self starter for light / heavy motor vehicle / mobile equipment to
prevent any damage to the self starter, fly wheel gear of the engine
during running condition.
Sometimes, the driver / operators of light / heavy motor vehicle /
mobile equipments may start by mistake the engine of the vehicle
through self starter, while engine is In running condition and as a
result pinion strikes the fly wheel ring gear causing damage to self
starter and fly wheel gear, which is very costly in respect of repairing
/ replacement / down time of the vehicle or the equipment
In this background a novel circuit has been developed in the present
invention, incorporated in the existing circuit of the self starter to

eliminate the hazards of restart of the engine in running condition.
The novelty of this invention is with the logic of NO/NC contacts
which has been described In detailed description supported by
schematic diagram.
OBJECT OF THE INVENTION
- The object of the invention is to develop an interlocking circuit in
the self starter of a motor vehicle / mobile equipment to prevent
any accidental damage
- Another object of the Invention Is to prevent the self starter from
restarting while the engine is in running condition
- Further object of the invention is to develop a simple device
incorporating NO / NC contact with minimum cost.

- Also the object of the invention is to minimize maintenance/down time
cost of a vehicle or equipment
SUMMARY OF THE INVENTION
The present invention is provided with a device of circuit jammer of the self
starter circuit of light and heavy vehicle and mobile equipment comprising an
incorporation of an electromagnetic switch which is made by a solenoid coil on
steel body within the power line circuit; characterized in that once the engine is
started the alternator starts delivering the current on the magnetic switch which
starts functioning making the circuit normally open and battery is disconnected
from the supply.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
FIG: 1 shows the schematic drawing of the interlocking device incorporating the
Engine, Alternator, solenoid valve, magnetic switch, Battery, Push botton switch,
NO/NC contact, solenoid valve, magnetic switch, 4st switch, self starter.

DETAIL DESCRIPTION OF THE PREFERRED EMBODIMENT
The prime embodiment of the present invention is described through
the schematic diagram as per Fig-1.
The initial power of the vehicle / mobile equipment is supplied by the
battery (8) when the Push Button switch (7) is made on, through
'NC' contact (6,) 4st switch (4) and self starter (3) in firing of the
engine (1).
Once the engine (1) starts, the shaft of the engine, through fly wheel
rotates the alternator (2) to generate captive power required for the
vehicle or mobile equipment
The alternator current in turn excites the solenoid coil (5) to activate
the magnetic switch (9) which makes the normally closed contact
(NC) 6 to normally open (NC) 6' to de excite the self starter circuit In
running condition of the engine. The battery (8) In that position is

not able to continue supply power to the starter through (NO)
contact 6', even if, the push button of the starter (3) Is pushed by
mistake, which is termed as interlocking.
When the engine stops, alternator stops automatically generating no
current flowing through the solenoid coil (5) of the magnetic switch
(9). As a result spring charged contact comes back to its original
position NC (6) from NO position (6') and the engine can again be
restarted by the self starter through battery power.

WE CLAIM:-
1. A device of circuit jammer of the self starter circuit of light and heavy
vehicle and mobile equipment comprising;
- an incorporation of an electromagnetic switch which is made by a
solenoid coil on steel body within the power line circuit;
characterized in that once the engine is started the alternator starts
delivering the current on the magnetic switch which starts functioning
making the circuit normally open and battery is disconnected from the
supply.
2. The device as claimed in claim 1 wherein normal open/normal close
contact (6 - 6') operated by an electromagnetic switch (9) having a
solenoid coil wound on a bar (5), jamming self starter circuit from
energizing in running condition of the engine.
3. The device as claimed in claim 1 and claim 2 substantially described under
detailed description along with the enclosed drawing.

ABSTRACT

A DEVICE OF CIRCUIT JAMMER OF SELF STARTER
The present invention is provided with a device of circuit jammer of the self
starter circuit of light and heavy vehicle and mobile equipment comprising an
incorporation of an electromagnetic switch which is made by a solenoid coil on
steel body within the power line circuit; characterized in that once the engine is
started the alternator starts delivering the current on the magnetic switch which
starts functioning making the circuit normally open and battery is disconnected
from the supply.