FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
AND
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
A mechanism for sensing aberrations in coating machine.
APPLICANT(S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S)
Kathekiya Fulabhai Roopabhai of Crompton Greaves Limited^
Baroda Lamp Works (BLW), Village Kural, Padra Jambusar Road, Padra Taluka, Vadodara - 391430, Gujrat, India; an Indian National.
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

FIELD OF THE INVENTION:
This invention relates to the field of electrical and electronic assemblies and engineering.
Particularly, this invention relates to the field of equipment, assemblies, and machines for fluorescent tube lamp.
Specifically, this invention relates to a mechanism for sensing aberrations in coating machine.
BACKGROUND OF THE INVENTION:
A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light, and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent lamp; some types fit into light fixtures formerly used for incandescent lamps.
The lamps use a tube which is curved or folded to fit into the space of an incandescent bulb, and further use a compact electronic ballast in the base of the lamp. The tubes are coated tubes.
For the production of these CFL, and for the coating of these tubes, a coating
machine is used. This coating machine follows the following 9 steps:
1. In the first step, CFL tube is loaded on to loading arms of the coating
machine. A plurality of CFL tubes may be loaded in parallel. The machine
head holds on to the tube.

2. In the second step, a cylinder of the machine is used to press the loaded tube(s).
3. In the third step, a lever of the machine is actuated to invert the tube(s) to form a U-shape.
4. In the fourth step, a coating solution is filled in the U-tube.
5. In the fifth step, the coating solution filled tube is left to dry.
6. In the sixth step, the U-tube is inverted to remove extra coating solution from the tube.
7. In the seventh step, time elapses for drying of the coating solution.
8. In the eight step, the coated tube moves forward.
9. In the ninth step, unloading of the CFL U-tubes(s) take place.
Thus, coated CFL tubes are obtained at the end of 9 steps performed by the coating machine.
In the loading step (first and second), a spring mechanism is used at the machine head to grasp on to the U-tube.
However, in practice, it has been observed that the spring may snap and the machine head may just hand, thereby causing hanging position of the tube.
While the tubes move forward in the machine the hanging faulty tubes may
interfere with the machine mechanism and cause breakage and damage to the
machine.
Coating machine is in operation continuously. Any stoppage time on this machine
results in loss of production. Machine heads are held in position by the spring
tension during the operation and if the spring tension fails, the head slips from its

position and gets stuck with other machine parts. This results in damaged machine head and loss of production due to major down time for correction of the damaged head.
Hence, there is a need for a system to avoid such breakage and damage and to reduce or avoid downtime.
OBJECTS OF THE INVENTION:
An object of the invention is to provide a mechanism to detect the slipped head due to failure of spring.
Another object of the invention is to prevent or avoid coating machine breakage and damage.
Yet another object of the invention is to reduce machine down time.
SUMMARY OF THE INVENTION:
According to this invention, there is provided a mechanism for sensing aberrations in coating machine, said mechanism comprises:
a. sensor adapted to sense aberrations in coating machine working, said sensor
being located in a part of said machine where tube inversion is completed;
and
b. sensor operated relay, said relay adapted to actuate a stop mechanism for
stopping functioning of said machine.

Typically, said sensor is a proximity sensor adapted to sense proximity of slipped head in said part of said machine.
Typically, said sensor is an inductive proximity sensor adapted to sense proximity of slipped head in said part of said machine.
Typically, said mechanism comprises a restart mechanism in order to restart said mechanism after said stopping of said machine.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which:
Figure 1 illustrates a schematic of the coating machine along with mechanism for sensing aberrations in coating machine; and
Figure 2 illustrates a schematic circuit diagram for actuating a relay in relation to sensed aberrations.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
According to this invention, there is provided a mechanism for sensing aberrations in coating machine.
Figure 1 illustrates a schematic of the coating machine (100) along with mechanism for sensing aberrations in coating machine.

Figure 2 illustrates a schematic circuit diagram for actuating a relay in relation to sensed aberrations.
CFL tubes (20) are head mounted on the coating machine.
In accordance with an embodiment of this invention, there is provided a sensor (10) adapted to sense aberrations in the coating machine working. The sensor is, typically, a proximity sensor. Preferably, it is an inductive proximity sensor. The aberration is a slipped head which renders the CFL tube hanging. The inductive proximity sensor senses slipped head. The slipped head condition occurs due to spring (30) snapping.
The inductive proximity sensor is located in the part of the machine where the seventh step, as explained above, is carried out. In the sixth step, the U-tube is inverted to remove extra coating solution from the tube. Hereafter, if the spring breaks, the tube is rendered in a hanged position. The hanging end comes in inductive proximity to the sensor and the sensor senses aberration in relation to slipped head.
In accordance with another embodiment of this invention, a sensor operated relay (50) is provided. The relay actuates a stop mechanism which stops the machine functioning. The inductive proximity sensor senses the slipped head condition (40) and gives signal to relay to stop the machine and all of its functions. The machine will not restart, until an operator presses a reset button.
The technical advancement of this invention lies in provisioning a sensor in a specific pre-determined part of the coating machine which is susceptible to damage and which causes subsequent damage to the tubes of the CFL. The sensor senses

damaged condition, due to spring damage, by sensing hanging condition due to inductive proximity. A sensor actuated relay is provided which stops the machine instantly upon detecting sensed aberration of hanging condition. Therefore, damage to the machine, in general, is avoided. Hence, major down time is also avoided. Upon sensing the damage, the spring can be changed, quickly, and the machine can be restarted.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
,1. A mechanism for sensing aberrations in coating machine, said mechanism comprising:
a. sensor adapted to sense aberrations in coating machine working, said
sensor being located in a part of said machine where tube inversion is
completed; and
b. sensor operated relay, said relay adapted to actuate a stop mechanism
for stopping functioning of said machine.
2. A mechanism as claimed in claim 1 wherein, said sensor is a proximity sensor adapted to sense proximity of slipped head in said part of said machine.
3. A mechanism as claimed in claim 1 wherein, said sensor is an inductive proximity sensor adapted to sense proximity of slipped head in said part of said machine.
4. A mechanism as claimed in claim 1 wherein, said mechanism comprising a restart mechanism in order to restart said mechanism after said stopping of said machine.