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, 2005
COMPLETE SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
A hook forming assembly for a mount machine for making fluorescent tube lamps
APPLICANT (S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worii, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S)
Patel Keyur; of Crompton Greaves Limited, Baroda Lamp Works, Kural Village, Taluka: Padra, Jambusar Road, District: Baroda-391430, Gujarat, 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 mechanical assemblies and mechanical engineering.
Particularly, this invention relates to the field of equipment, assemblies, and machines for fluorescent tube lamp.
Specifically, this invention relates to an assembly for a hook forming assembly for a mount machine for making fliKmessettt tube lamps.
BACKGROUND OF THE INVENTION
Mount machine is a machine for placement of lead-in wire of filament in a mount in an incandescent bulb. The mount includes an exhaust tube which is located in a hollow shaft neck region of a bulb for allowing communication with the atmosphere.
A bulb includes a glass enclosure having a neck member with a mount element. The mount element needs to be centred in the glass shell so as to form an effective and accurate bulb assembly.
The filament needs to be formed into a hook-shape before being placed in the mount region. Hence, there is an assembly for a mount machine which is adapted to perform this function of hook formation.

According to the prior art, a roller and pin mechanism was used to form the hook angle of the lead-in wire at mount machine. However, this prior art mechanism, assembly, machine, and method is ridden with disadvantages. There may be inconsistency in hook angle. There is frequent wearing out and breaking of the hook forming pin. The angle setting was a skilled job and time consuming activity. The frequent wearing out of the roller, resulted in variations in hook angle, thereby departing from consistency. If the mount head center is not proper with respect to hook forming unit pin, then hook was formed at one lead-in wire and another wire was without hook formation. This resulted in rejection of the mount, which was due to insufficient length of the pin, which resulted in hook slipping.
Consequently, this results in bad quality of lamps and rejections of lamps under quality control procedures.
OBJECTS OF THE INVENTION
An object of the invention is to manufacture and provide relatively better quality of bulbs or incandescent lamps or fluorescent tube lights.
Another object of the invention is to reduce wastage of bulbs during manufacturing of bulbs.
Yet another object of the invention is to arrest frequent wearing out and breaking of the hook forming pin.
Still another object of the invention is to provide consistent and standard angle setting of hook formation.

An additional object of the invention is to provide hook formation at both lead-in wires without the need for proper centering of mount head.
Yet an additional object of the invention is to provide angle uniformity in hook formation of lead-in wires.
Still an additional object of the invention is to provide hook-formed lead-in wires with relatively less accuracy.
SUMMARY OF THE INVENTION
According to this invention, there is provided a hook forming assembly for a mount machine for making fluorescent tube lamps, said assembly comprises:
a. a tubular channel element with an angularly displaceable roller pin located
transversely through side walls of said tubular channel, said roller pin being
spaced apart from the surface of said tubular channel such that said roller pin
can rotate axially and has a clearance from said surface to receive a lead-in
wire for hook formation; and
b. rack and pinion arrangement, located laterally with respect to said tubular
channel element adapted to be driven by a shaft and adapted to drive angular
displacement of said roller pin to roll said lead-in wire.
Typically, said assembly comprises a spring loaded side wall adapted to include a slot for receiving a distal end of said roller pin.
Typically, said pinion is driven by said rack, said rack being axially connected to said roller pin, such that the axial movement of said rack causes angular

displacement of said pinion which in turn causes corresponding angular displacement of said roller pin.
An assembly as claimed in claim 1 wherein, said assembly comprising a spring loaded side wall adapted to be lifted after a pre-defined cycle of said pinion.
Typically, said assembly comprises a shaft alongside said tubular channel but external to said tubular channel, which shaft is connected to said rack.
Typically, said assembly comprises a shaft alongside said tubular channel but external to said tubular channel, which shaft is connected to said rack and wherein a cam follower drives said shaft.
Typically, said roller pin is a slotted roller pin.
According to one exemplary embodiment, said roller pin is about 28.5mm in length.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 illustrates a top view of the hook forming assembly, for a mount machine, of the prior art; and
Figures 2 and 3 illustrate proximal side views of the hook forming assembly, for a mount machine, of the prior art.

The invention will now be described in relation to the accompanying drawings, in which:
Figure 4 illustrates a top view of the hook forming assembly; and Figure 5 illustrates a side view of the hook forming assembly.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 illustrates a top view of the hook forming assembly, for a mount machine, of the prior art.
Figures 2 and 3 illustrate proximal side views of the hook forming assembly, for a mount machine, of the prior art.
The assembly (100) includes an elongate tubular channel (12). A hook angle forming pin (14) which is an elongate pin is located transverse to the tubular channel (12), beyond an end of the tubular channel (12). The pin (14) is spaced apart from the end of the tubular channel (12). This space provides a region which allows hook formation of lead-in wires such that the lead-in wire can be wound about the hook angle forming pin (14). This hook angle forming pin (14) extends in a cantilever fashion beyond the end of the tubular channel (12). This hook angle forming pin (14) is connected to a tubular slidable element (16) in the channel (12) which is allowed to slide axially along the tubular channel (12) by the means of a roller pin (18). Further, there is an angle setting mechanism (18) which joins the hook angle forming pin (14) to the slidable element (16). This angle setting mechanism (22) allows for angular displacement of the pin (14), thereby allowing appropriate angled setting of the pin (14) with respect to the channel (12).

The limitations of the prior art are discussed above.
According to this invention, there is provided a hook forming assembly for a mount machine for making fluorescent tube lamps.
Figure 4 illustrates a top view of the hook forming assembly (200).
Figure 5 illustrates a side view of the hook forming assembly (200).
In accordance with an embodiment of this invention, there is provided a tubular channel element (42) which is similar to the tubular channel element of the prior art. However, the hook forming assembly is different.
In accordance with another embodiment of this invention, there is provided an angularly displaceable roller pin (44) located transversely through the side walls of the tubular channel (42). The roller pin (44) is spaced apart from the surface of the channel (42) such that the roller pin (44) can rotate axially and has a clearance from the surface. The roller pin (44) is a slotted roller pin.
In accordance with yet another embodiment of this invention, there is provided a spring loaded side wall (46). This side wall (46) includes a slot for receiving a distal end of the roller pin (44).
In accordance with still another embodiment of this invention, there is provided a rack (52) and pinion (54) arrangement, located laterally with respect to the tubular channel element (42). The pinion (54) is driven by the rack (54) and is axially connected to the roller pin (44). The axial movement of the rack (52) causes

angular displacement of the pinion (54). This angular displacement movement of the pinion (54) causes corresponding angular displacement of the roller pin (44). A lead-in wire is slid in the spaced apart region of the roller pin (44) with respect to the tubular channel element (42). The angular displacement of the roller pin (44) causes hook formation of the leadOin wire. After a pre-defined cycle of the pinion (54), the spring loaded side wall (46) can be lifted and the hook-formed lead-in wire can be removed. The rack (52) and pinion (54) arrangement is used for setting the hook angle.
In accordance with an additional embodiment of this invention, there is provided a shaft (56) alongside the tubular channel (42) but external to the tubular channel (42), which shaft is connected to the rack (52). A cam follower (58) drives the shaft (56).
The use of the assembly of this invention provides consistent hook angle of lead-in wire. There is no frequent wearing out of the slotted roller pin. There is relative ease of hook angle setting. No skilled workman is needed for hook angle setting. Even if the mount head, of the lamp, is off-centre, the hook gets formed at both the lead in wires. The length of the slotted pin available for forming hook is about 28.5mm.
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.

I claim,
1. A hook forming assembly for a mount machine for making fluorescent tube
lamps, said assembly comprising:
a. a tubular channel element with an angularly displaceable roller pin
located transversely through side walls of said tubular channel, said
roller pin being spaced apart from the surface of said tubular channel
such that said roller pin can rotate axially and has a clearance from
said surface to receive a lead-in wire for hook formation; and
b. rack and pinion arrangement, located laterally with respect to said
tubular channel element adapted to be driven by a shaft and adapted to
drive angular displacement of said roller pin to roll said lead-in wire.
2. An assembly as claimed in claim 1, wherein said assembly comprising a spring loaded side wall adapted to include a slot for receiving a distal end of said roller pin.
3. An assembly as claimed in claim 1, wherein said pinion is driven by said rack, said rack being axially connected to said roller pin, such that the axial movement of said rack causes angular displacement of said pinion which in turn causes corresponding angular displacement of said roller pin.
4. An assembly as claimed in claim 1, wherein said assembly comprising a spring loaded side wall adapted to be lifted after a pre-defined cycle of said pinion.

5. An assembly as claimed in claim 1, wherein said assembly comprising a shaft alongside said tubular channel but external to said tubular channel, which shaft is connected to said rack.
6. An assembly as claimed in claim 1, wherein said assembly comprising a shaft alongside said tubular channel but external to said tubular channel, which shaft is connected to said rack and wherein a cam follower drives said shaft.
7. An assembly as claimed in claim 1, wherein said roller pin is a slotted roller pin.
8. An assembly as claimed in claim 1, wherein said roller pin is about 28.5mm in length.