FIELD OF THIS INVENTION :
This present invention relates to the development of a mobile phone operated
audio-visual alarm/ indication system directed to avoid accidents for silently moving
wagon-rake being pushed by loco engine from backside. The mobile phone operated
remote controlled device developed for audio visual alarm system for loco wagons is
further adapted to be used as a remote controlled switch for different other devices
like, Air Conditioner, Geyser, Sound system ,Room Lights, Household Pump, Pump
of a farmer installed at firming land and the like. Moreover, switching on or off such
devices from a far away place is possible.
BACKGROUND ART :
In a plant or factory there are complex rail track network laid here and there and
manoeuvring wagon rakes on such tracks inside the plant premises is very
common. In some cases specially during placing of wagon rakes loco engine pushes
the rake from back side. As the length of wagon rake is considerably long the driver
is usually unable to see the front track and silently moving wagon rake poses safety
hazard and high potential danger in the plant premises. To avoid this situation in
plant especially at CCP and Merchant Mill areas an alarm system is essential. But as
the loco engine and wagons are decoupled time to time , the operation of the
device is generally attained through remote and also the portability of the remote
control is also importantly desired.
Fixed locations where this activity of placing of wagons takes place regularly, there
the receiver unit i.e. base unit may be fixed instead of making it portable. In case of
portable receiving unit, somebody needs to fix the base unit at the front wagon
which may not be convenient always. So both options are there and one can chose
the best as per requirement. In case of fixed base unit there is an advantage of
using 220v plug supply and therefore no need of storage battery and also the
hooter may be made more louder using 220v power source.
All remote control system usually require a transmitter and a receiver to
communicate. In order to provide for remote control operation in case of such
wagon rakes operating in plant or factory premises it is usually needed to provide
a pair of long range and power full transmitter-receiver set as the basic component

other than the audio visual alarm system. However, it was found that the available
transmitter-receiver (Tx-Rx) modules as per the above requirement are very costly.
Moreover designing and developing newer version of such of Tx-Rx have also been
discarded due to Governmental regulations concerning the development/use of the
such long range transmitter/receiver.
There has thus been a continuing need in the art to on one hand provide for the
required safety in manoeuvring the wagons rakes loco engine pushes the rake from
back side and on the other hand provide for such safety involving gadgets which
would be readily available and also would not violate the governmental regulations
concerning the development/use of the such long range transmitter/receiver. A low
cost highly featured Device would provide all such facilities in the form of a
handheld easy to operate mobile phone.
OBJECTS OF THE INVENTION :
It is thus the basic object of the present invention to provide for an audio-visual
alarm/ indication system directed to avoid accidents for silently moving wagon-rake
being pushed by loco engine from backside.
Another object of the present invention is directed to the development of a
suitable long range omni-directional remote controlled alarm device which can be
operated from the driver's cabin of the pushing loco engine to operate the alarm
attached at front wagon to avoid accidents and thereby loss of lives and property.
Yet further object of the present invention is to provide for an audio-visual alarm/
indication system directed to avoid accidents for silently moving wagon-rake being
pushed by loco engine from backside involving simple and cost-effective gadgets
which can be readily used and effectively involved in generating such required
audio-visual signals for safety purposes.
Further object of the present invention is directed to the development of a suitable
long range omni-directional remote controlled alarm device to minimise Man-Hr loss
in respect of plant production avoiding accident.

Yet another object is that the device can be used for versatile purpose i.e. to control
any electrical/electronic/electro-mechanical gadget from a remote place anywhere
on this globe through the mobile, whereby instead of activating i.e. switching on/off
of the alarm, that particular gadget will be switched on/off.
SUMMARY OF THE INVENTION :
The basic aspect of the present invention is thus directed to a cost-effective mobile
phone based remote control system/switching comprising:
means for transmitting signal from a distant location comprising a transmitter
mobile phone;
means for receiving the said mobile phone generated signal involving the
mobile phone network at a receiver mobile phone and activating any
device/system /process involving the said mobile phone based thus
transmitted signal.
Another aspect of the present invention is directed to a cost-effective mobile phone
based remote control system comprising signal processing means adapted to
cooperate for the remote controlled operation of any gadget/device /process
including (i) Air Conditioner (ii)Geyser (iii) Sound system (iv) Room Lights (v)
Household Pump (vi)Pump of a farmer.
A still further aspect of the present invention is directed to a remote control based
system adapted for safe driving of rear end engine driven wagon rakes comprising:
means for transmitting alarm signal from the driver's cabin at the rear
comprising a mobile phone;
means for receiving the said mobile phone based alarm signal and activating
an alarm at the front wagon-rake comprising (i) said alarm signal receiving
mobile set (ii) a signal processing means and (iii) means for generating audio
and/or visual alarm signal based on the input alarm signal from said driver's
cabin.

According to a preferred aspect of the invention the above remote control based
system adapted for safe driving of rear end engine driven wagon rakes comprises
an audio-visual, adjustable time controlled electronic alarm, at the front of the
wagon-rake, operated from the driver's cabin from backside.
Preferably, the above remote control based alarm system using mobile phone
includes an adjustable time controlled electronic device has an in built mono-
stable timer adapted to actuate the alarm for a predetermined time only and stops
the alarm automatically after preset time is over.
According to yet further aspect of the invention the remote control based alarm
system using mobile phone comprises radio frequency operated omni-directional
remote controlled alarm involving cellular/mobile phone signal adapted to activate
the alarm system for adjustable time duration through a personal mobile of driver
of the loco engine for its communication between back side of the wagon-rake and
the alarm system attached at front of the wagon rakes.
Yet another aspect of the present invention is directed to a remote control based
alarm system using mobile phone comprising a siren/ hooter and three directional
flashing lights which work on a 6v dc rechargeable battery where the mobile set
also get charge from this battery and the whole circuit has been put in a cabinet of
portable emergency lantern, hanged in front of a moving wagon.
In accordance with a preferred aspect of the invention the same provides for an
alarm system which is adapted to be triggered by a 'missed call' from any mobile
phone set. The alarm has a siren/ hooter and 3 directional flashing lights which
work on a 6v dc rechargeable battery usually used in emergency lantern. The
mobile set also get charge from this battery. The whole circuit can be put in a
cabinet of portable emergency lantern which can be charged from 230v ac during
idle period and can be hanged in front of a moving wagon during its use.
In accordance with yet another aspect of the present invention in some cases, it
may be inconvenient to attach it in front of wagon; in that case the gadget can be
fixed at a particular accident-prone location instead of making it portable (in that
case the gadget can be directly connected to mains 230v supply instead of 6v
battery supply in the portable unit for louder & more prominent audio visual alarm).
5

The details of the invention, its objects and advantages are explained hereunder in
greater detail in relation to non-limiting exemplary illustrations as per the following
accompanying figures:
BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES :
Fig. 1 shows how a conventional wagon rake being pushedby loco engine from
back;
Fig. 2 is a schematic iiiustrtaion for communication between front and back of
wagon rake by a separate transmiter and recever system with alarm unit as desired
in accordance with the present invention;
Fig. 3 shows the block diagram of mobile controlled remote alarm circuit.
Fig. 4a shows the circuit diagram of audio visual alarm.
Fig.4b shows the power supply circuit for charging battery and mobile phone.
DETAIL DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE
ACCOMPANYING DRAWINGS :
Reference is first invited to the accompanying figure 1 which shows a conventional
wagon which is usually driven from the back by a loco engine. In such wagons with
rear driven engine in some cases specially during placing of wagon rakes loco
engine pushes the rake from back side. As the length of wagon rake is considerably
long the driver can't see the front track and silently moving wagon rake poses
safety hazard and high potential danger in the plant premises.
Figure 2 illustrates the possible mechanism in accordance with the invention to
provide for some remote alarm system whereby alarms can be generated from the
drivers cabin to caution people about the moving wagon rail and to stay away from
the same. However, usually all remote control system consists of a transmitter and
receiver and the present requirement a pair of long range and power full
transmitter-receiver set are required as the basic component other than the audio
visual alarm system. However, initial study and experimentation revealed that the
readymade transmitter-receiver (Tx-Rx) module as per the requirement of the
invention were very cost-extensive . Also, the idea of designing and fabrication of

Tx-Rx have also had to be discarded as there were some restrictions of Indian
Government to develop/use long range transmitter/receiver.
As a solution to the above problem, the present invention is a mobile phone
operated remote control system providing an audio-visual, electronic alarm, at the
front of the wagon-rake, operated from the driver's cabin from backside.
In figure 3, the block diagram of mobile controlled remote alarm circuit diagram
consist of 1) Mobile phone set, 2) Signal processor, 3) Timer with time set knob, 4)
Blinking Lights & Siren, and 5) 6v dc Power Supply. All the circuit blocks are
powered by 6v dc power supply which is a 6 volt DC rechargeable battery, generally
used in emergency lantern.
In figure 4a is the detail circuit diagram of audio visual alarm, where input delivered
to this circuit by mobile phone, when dialled by the driver of the loco engine to the
specific number attached with it. The Input is a audio signal as the ring tone of the
mobile, collected from the audio socket of that mobile phone. Then the input signal
applied as a trigger-pulse to the timer IC, through a transistor. The timer IC is a
mono-stable timer which provides an output for a specific period of time to continue
the audio visual alarm. The output of the IC only for a predetermined time only and
stops the automatically after preset time is over. This time is controlled by variable
resistance in the circuit. Output from the timer drive the Flasher/ blinker circuit and
siren through a transistor for that predetermined time only. All the circuit
components are operated by 6v rechargeable battery.
It is thus possible by way of the present invention to provide for the desired
remote controlled audio visual alarm system for safe driving of rear end engine
driven wagon rakes. Importantly, the audio-visual alarm system of the invention
involves very simply and cost-effective gadgets such as any conventional mobile
phone to generate and receive the alarm signals at the from and at respectively of
the two distant ends of the wagon rake.
Advantageously, the system of the invention is adapted for long range operation
without violating any governmental regulations and /or being resistant to any RF
interference. Moreover there is no running cost for operation of this alarm as it is
actuated through a 'missed call' only.

WE CLAIM :
1. A cost-effective mobile phone based remote control system/switching
comprising:
means for transmitting signal from a distant location comprising a transmitter
mobile phone;
means for receiving the said mobile phone generated signal involving the
mobile phone network at a receiver mobile phone and activating any
device/system /process involving the said mobile phone based thus
transmitted signal.
2. A cost-effective mobile phone based remote control system as claimed in claim 1
comprising signal processing means adapted to cooperate for the remote
controlled operation of any gadget/device /process including (i) Air Conditioner
(ii)Geyser (iii) Sound system (iv) Room Lights (v) Household Pump (vi)Pump
of a farmer.
3. A remote control based system adapted for safe driving of rear end engine
driven wagon rakes comprising:
means for transmitting alarm signal from the driver's cabin at the rear
comprising a mobile phone;
means for receiving the said mobile phone based alarm signal and activating
an alarm comprising (i) said alarm signal receiving mobile set (ii) a signal
processing means and (iii) means for generating audio and/or visual alarm
signal based on the input alarm signal from said driver's cabin.
4. A remote control based system adapted for safe driving of rear end engine
driven wagon rakes as claimed in claim 3 comprising said means for receiving
the mobile based alarm signal is provided at the front wagon and the system

involves an audio-visual, adjustable time controlled electronic alarm, at the
front of the wagon-rake, operated from the driver's cabin from backside.
5. A remote control based alarm system using mobile phone as claimed in anyone
of claims 3 or 4 wherein said adjustable time controlled electronic device has
an in built mono-stable timer adapted to actuate the alarm for a
predetermined time only and stops the alarm automatically after preset time is
over.
6. A remote control based alarm system using mobile phone as claimed in anyone
of claims 3 to 5 comprising radio frequency operated omni-directional remote
controlled alarm involving cellular/mobile phone signal adapted to activate
the alarm system for adjustable time duration through a personal mobile of
driver of the loco engine for its communication between back side of the
wagon-rake and the alarm system attached at front of the wagon rakes.
7. A remote control based alarm system using mobile phone as claimed in anyone
of claims 3 to 6 comprising a siren/ hooter and three directional flashing lights
which work on a 6v dc rechargeable battery where the mobile set also get
charge from this battery and the whole circuit has been put in a cabinet of
portable emergency lantern, hanged in front of a moving wagon.
8. A remote control based alarm system using mobile phone as claimed in anyone
of claims 3 to 7 wherein the same involves low cost / rejected mobile phone
set as the receiver with a unique particular phone no. known to loco driver
and the said alarm system is triggered by a 'missed call' from any mobile
phone kept with loco driver.
9. A remote control based alarm system using mobile phone as claimed in anyone
of claims 3 to 8 comprising an alarm having a siren/ hooter and 3 directional
flashing lights adapted to work on a 6v dc rechargeable battery usually used in
emergency lantern with said mobile set also getting charge from this battery,
the whole circuit being housed in a cabinet of portable emergency lantern
which can be charged from 230v ac during idle period and can be hanged in
front of a moving wagon during its use.

10. A remote control based alarm system using mobile phone as claimed in claim
3 wherein the gadget is fixed at a particular accident-prone location instead of
making it portable with said gadget directly connected to mains 230v supply
instead of 6v battery supply in the portable unit for louder & more prominent
audio visual alarm.
11. A remote control based alarm system using mobile phone adapted for safe
driving of rear end engine driven wagon rakes substantially as herein
described and illustrated with reference to the accompanying figures.

This present invention relates to the development of a mobile phone operated
audio-visual alarm/ indication system directed to avoid accidents for silently moving
wagon-rake being pushed by loco engine from backside. The audio-visual alarm
system of the invention involves very simply and cost-effective gadgets such as any
conventional mobile phone to generate and receive the alarm signals. The mobile
phone operated remote controlled device developed for audio visual alarm system
for loco wagons is further adapted to be used as a remote controlled ON/OFF
switching operation for different other devices like, Air Conditioner, Geyser, Sound
system ,Room Lights, Household Pump, Pump of a farmer installed at firming land
and the like. Moreover, switching on or off such devices from a far away place is
possible.