FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION Device For Controlling Compressed Air


APPLICANTS
TATA MOTORS LIMITED, an Indian company
Having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTOR
Mr. Kulkarni Balkrishna Ramchandra
An Indian National
of TATA MOTORS LIMITED,
An Indian company having its registered office
at Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention And the manner in which it is to be performed.


FIELD OF INVENTION
This invention is related to the compressed air control system and more particularly it relates to the device for controlling compressed air in compressed air pipeline.
BACKGROUND OF INVENTION
The compressed air is generated at its generating point and then transferred to the various destinations as per requirement through the pipelines. When it reaches to the particular shop of automobile manufacturing unit then again it is distributed to various machine groups by distribution system.
During the total travel of the compressed air if it is not used for driving any pneumatic tools then also there is some percentage of wastage taking place due to system leakages. Removal of the air leaking points is on going process but if these leakages are not removed on the time then it shares the measurable part of its manufactured value.
So one has to design the system and introduce in the air line so that whenever the use of the pneumatic system is stopped then at set time the incoming air line for that area gets off automatically and no air will be available during the set period.
The setting of the nonuse period for the air is adjustable and can be set as per the requirement of the user.
Presently the incoming air supply line got the manually operated valves. These valves might have been provided at height where the approach may be difficult. The manual intervention is required for making it ON/OFF which can not be predicted as regular as the machines/instruments do. Due to these problems valves are not operated on periodic basis and these valves get jam due to moisture in air

lines. Secondly if we made these valves off then the total pneumatic system under that zone get affected, so there is no choice to select the group of machine of which incoming air supply has to be cut off. So air supply remains to continue and wastage of air in that system too.
OBJECTS OF INVENTION
The main objective of the present invention is to provide the device for controlling the compressed air line.
Another object of the present invention is to provide the device for controlling the compressed air line which is simple in construction and cost effective.
Another object of the present invention is to provide the device for controlling the compressed air line which is easy to operate and maintenance.
STATEMENT OF INVENTION
Device for controlling compressed air line comprises; spring loaded directional control valve provided in compressed air line between the flanges which is connecting input and output of compressed air line and said control valve is having plunger piston, pilot valve is connected in pilot line between outlet of ball valve and direction control valve, electrical coil provided for operating the pilot valve, pilot line which is connected between the said pilot valve and output of the ball valve in pilot line, another ball valve provided between the flanges and parallel with direction control valve so that in case of failure of direction control valve this ball valve can be manually made on, synchronous timer clock for sending electrical command to said solenoid valve , electrical control panel provided for all electrical switchgears for operating the valve assembly, protection means for electrical protection from overloading and short-circuit in

electrical circuit , Time setting tool means which operates said solenoid valve through its relay contact, Mounting Rail mounted on the base of said electrical control panel, indication means for indicating the active status of said solenoid valve.
Device for controlling compressed air, in accordance with this invention, wherein said solenoid valve comprises pilot valve.
Device for controlling compressed air , in accordance with this invention, wherein said solenoid valve is electrically controlled solenoid valve.
Device for controlling compressed air , in accordance with this invention, wherein said solenoid valve is normally closed type solenoid valve.
Device for controlling compressed air , in accordance with this invention, wherein said solenoid valve is two position two way solenoid valve.
Device for controlling compressed air, in accordance with this invention, wherein said protection means is switch for electrical protection.
Device for controlling compressed air , in accordance with this invention, wherein said timer means is manually operated timer clock having plurality of notches setting the desired timing of breaks.
Device for controlling compressed air, in accordance with this invention, wherein said indication means is the indication lamp for indicating the status of said solenoid valve.

BRIEF DESCRIPTION OF INVENTION
In accordance with the present invention, system/device for controlling compressed air line comprises; spring loaded directional control valve provided in compressed air line between the flanges which is connecting input and output of compressed air line and said control valve is having plunger piston, pilot valve is connected in pilot line between outlet of ball valve and direction control valve, electrical coil provided for operating the pilot valve, pilot line which is connected between the said pilot valve and output of the ball valve in pilot line, another ball valve provided between the flanges and parallel with direction control valve so that in case of failure of direction control valve this ball valve can be manually made on. The said directional valve is spring loaded normally closed type which will operate on compressed air pilot line against the spring force provided therein and opens the path to compressed air out by operating the said plunger piston. Pilot compressed air supply for the operation of said plunger piston is taken from the electrically operated single pilot valve. When electrical coil gets energized, pilot line to directional valve gets actuated. The pilot compressed air line lift the said piston plunger from its position and opens the port for compressed air passage which connects the IN line to OUT line of compressed air. When the electrical supply of the said coil is off then said coils get de-energized and pilot compressed air supply to directional valves cut off .The said plunger piston gets its position due to spring force on it.
BRIEF DESCRIPTION OF DRAWINGS
Figure-01 shows the pneumatic circuit, in accordance of the invention. Figure-02 shows the electrical circuit of the present invention. Figure-03 shows the schematic diagram of the present invention.

DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
Now referring to figure-01 to 03, In accordance with the present invention, system/device for controlling compressed air line comprises; spring loaded directional control valve provided in compressed air line between the flanges which is connecting input and output of compressed air line and said control valve is having plunger piston, pilot valve(U') of direction control valve (Z) is connected in pilot line (E-F) between outlet of ball valve (U) and direction control valve (Z) as shown in figure-01 , electrical coil (G) is provided on said pilot valve (IT) for operating the said pilot valve (LP), pilot line which is connected between the said pilot valve (U') and output of the ball valve in pilot line, Fig - 03 another ball valve (R) is provided between the flanges and parallel with direction control valve so that in case of failure of direction control valve this ball valve can be manually made on, synchronous timer clock for sending electrical command to said solenoid valve , electrical control panel provided for all electrical switch gears (MCB,Timer clock) for operating the valve assembly, protection means for electrical protection from overloading and short-circuit in electrical circuit , Time setting tool means which operates said solenoid valve through its relay contact, Mounting Rail mounted on the base of said electrical control panel, indication means for indicating the active status of said solenoid valve.
Electrically operated normally closed type two position two way valve is connected between the line points input and output of compressed air line incoming air supply (A) & out going air supply (B) .This valve remains closed when electrical supply is not given to its coil and inlet to outlet flow of the air

restricts. A 24 Hrs timer is used to give electrical command to the said solenoid valve for setting timer as per your requirement. The said timer consists of four notches for one hour setting which comprises 96 notches for 24 hrs which is why this timer is called as daily timer. The least count of this timer is 15 minutes. The said timer can be toggled by setting these notches. Electrical circuit as shown in figure-02, when there is 220 V AC supply arise at the point 1 & 0 and when the protection means such as MCB (J) in the circuit is ON then the supply arises at point No 3 then the timer coil gets energized .As per the setting of the notches the said timer output contacts makes ON and supply arises at point no 4 and the electrical coil of the said pilot valve of the solenoid valve connected between the input and output of compressed air line A & B as shown in figure-01 gets energized that causes the pilot air flow lifts the main spool of the said solenoid valve and allows the air flow from inlet to outlet. The de- enerzisation of said solenoid valve takes place as per time set on the said timer as shown in figure-02. The switching of ON to OFF of the electrical coil and visa a versa happens automatically as per the time set on the said timer. The notches of the said timer set can be altered at any time as per the production schedule. The said timer comprises the internal battery back up in case of failure of main supply .So the time setting of the said timer does not get disturbed automatically due to power cut. The said ball valve provided between the flanges and parallel with said direction control valve as shown in figure-01 can be used as bypass path in case of failure of electrically operated solenoid valve operations .The said ball valve can be made immediately ON manually in case of electrically operated solenoid valves get any problem and the line stoppages can be avoided. The rubber tube is provided between the pilot line (E & F) as shown in figure-01 for pilot air connections to said electrically operated solenoid valve. The pilot air lifts the main spool of electrically operated solenoid valve when coils get energized against the spring force inside it and air path opens and air flows from inlet to outlet.

The said assembly of said device for controlling compressed air consist of following components-
1) Barrel piece named as -P
2) Pipe Bends named as -Q
3) Ball Valve ( manual by -pass valve) named as -R
4) Flanges named as - S
5) Barrel piece named as -T
6) Ball Valve named as -U
7) Gasket packing for flanges- - V
8) Quick change couplings -W
9) Quick change couplings -X

10) Rubber Tube -Y
11) Electrically operated solenoid valve (solenoid valve with coil) -Z
12) Electrical Control panel 13)MCB-06Amps-(J)

14) Timer Clock (H) Daily-24 Hrs base
15) Mounting Rail for mounting timer and M CB in Electrical control panel
16) Indication Lamp
17) pilot valve-(U')
18) Electrical coil (G) of pilot valve (U')
1) Barrel piece named as -P in figure-03 is used for different connections like -Incoming air supply to flange, incoming supply to pipe bend, Pipe bend to flanges, Flange to manually operated ball valve, Manually operated ball valve to Flange, Flange to pipe bend, Pipe bend to outgoing air supply pipe, Flange to Electrically operated solenoid valve, Electrically operated solenoid valve flange, Flange to outgoing air supply.

2) Pipe Bends named as -Q shown in figure-03 is used to connect the bypass path provided with manually operated ball valve and for the purpose of bypassing the electrically operating solenoid valve.
3) Ball Valve (by- pass valve ) named as -R shown in figure-03 is used to allow or restrict flow of air from path C to D of figure-03 .It is manually operated.
4) Flanges named as - S as shown in figure-03, are provided in both the Electrical solenoid valve circuit and ball valve bypass circuit. The purpose of providing these flanges are easy removal of electrically operated solenoid valve or ball valve assembly .In case of repairs the blind flanges can be placed in place of solenoid valve or ball valve and can be easily removed for the maintenance.
5) Barrel piece named as -T as shown in figure-03 is provided to connect the inlet air line and the ball valve to provide the pilot line for electrically operated solenoid valve
6) Ball Valve named as -U as shown in figure-03 is provided to connect or disconnect the pilot line to electrically operated solenoid valve .This valve is generally ON in case of normal working .You can make it OFF when you want to replace the rubber tube Y.
7) Gasket packing for flanges named as - V as shown in figure-03 is provided for leak free flange joint in the air line path AB & CD
8) Quick change couplings -W figure-03 is provided for air tube( Y) connection at Ball Valve
9) Quick change couplings -X as shown in figure -03 is provided for air tube( Y) connection at electrically operated solenoid valve pilot line air connection

10) Rubber Tube - Y as shown in figure-03 is provided for pilot air connections from air inlet to incoming of pilot valve of electrically operated solenoid valve.
11) Electrically operated solenoid valve-Z -Electrically operated normally closed type two position two way valve is connected between the line points A 8c B as shown in figure-03 .It allows or stops the compressed air flow as per the electrical command from synchronous timer clock M located in electrical control panel K.
12) Electrical Control panel —Serves as metallic closure (having transparent sheet at its facing side) for all electrical switchgears used for operating the valve assembly (Z) . said electrical control panel comprises ; MCB ( J ) , Timer (H) .which are mounted on mounting rail.
13) MCB (J) of 06 Amps - Serves as Electrical protection for overloading and short-circuit means in electrical circuit.
14) Timer (H) Clock Daily-24 Hrs base-Serves as the Time setting tool. It has got 96 notches each having value of 15 minutes. It can be manually operated outward or inward position to set the desired timing of breaks. It has got battery backup incase of mains power supply failure. This timer operates the solenoid Z through its relay contact.
15) Mounting Rail -This rail is mounted on the base of electrical control panel-. It is the mounting base for MCB (J),Timer Clock (H).
16) Indication Lamp-The purpose of indication lamp is to indicate the active
status of electrically operated solenoid valve (Z). It becomes ON if solenoid (Z) is
ON

Advantages of the devices are:
• Manual intervention is not required, No need to make the valve manually On /OFF.
• Leakage of Compressed air is stops when the line is not in use and hence the cost saving of compressed air.
• The period for the incoming compressed air line can be set off.
• A particular group of machines can be selected for making the incoming compressed air line off. So no need to disturb the header valve positions again and again.
• As the electrically operated valves are operating as per setting on daily basis, so these valves may be free from any jam problems, So maintainability increased.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

WE CLAIM
1. A device for controlling compressed air in a compressed airline comprising:
a directional control valve provided in between flanges in the compressed air line which connects input and output of the compressed air line;
said control valve comprising a plunger piston;
a pilot valve is connected in a pilot line between outlet of a ball valve and said direction control valve;
an electrical coil provided for operating the pilot valve;
a further ball valve provided between said flanges and parallel with said direction control valve;
a timer means for sending electrical command to said solenoid valve;
an electrical control panel for operating the valve assembly;
Protection means provided in circuit for preventing from overloading and short-circuit in said circuit; and
Indication means for indicating the active status of said solenoid valve.
2. Device for controlling compressed air as claimed in claim 1 wherein said solenoid valve comprises pilot valve.
3. Device for controlling compressed air as claimed in claim 1 wherein said directional control valve is spring loaded directional control valve.
4. Device for controlling compressed air as claimed in claim 1 wherein said solenoid valve is electrically controlled solenoid valve.

5. Device for controlling compressed air as claimed in claim 1 wherein said solenoid valve is normally closed type solenoid valve.
6. Device for controlling compressed air as claimed in claim 1 wherein said solenoid valve is two position two way solenoid valve.
7. Device for controlling compressed air as claimed in claim 1 wherein protection means being a switch.
8. Device for controlling compressed air as claimed in claim 1 wherein said timer means is manually operated timer clock having plurality of notches setting the desired timing of breaks.
9. Device for controlling compressed air as claimed in claim 1 said indication means being the indication lamp for indicating the status of said solenoid valve.
10. Device for controlling compressed air substantially as herein described with reference to accompanying drawings.
Dated this 27th day of January 2009