FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION :
Suspension rod for fan
APPLICANTS :
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTORS:
Khandeparker Mahendra of Crompton Greaves Ltd, Fans Division, Plot No. 1, IDC Industrial Estate, Bethora, Ponda, Goa - 403409, 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 Specification:
This invention relates to the field of mechanical assemblies.
Particularly, this invention relates to a suspension rod for fans.
Background of the Invention:
A fan, typically, a ceiling fan is mounted / suspended from the ceiling using a suspension rod.
Figure 1 illustrates a suspension rod (100) of the prior art.
In the suspension rod of the prior art, a hollow shaft (12) is used. The hollow shaft includes at least two slits at its diametrically opposite lateral sides. This slit (12) being substantially linear from the operative bottom of said shaft to a mid-point of said shaft, culminates into a circular slit (16). This circular slit is provided so that wires from the motor suspended beneath the shaft can be inserted through the slit and the guided to the operative top of the shaft for further electrical connection. Further, the shaft includes a tightening element adapted to be fitted into another circular slit (18) provided at the operative bottom of said shaft such that the slit portion at the operative bottom provides a closure in order to grip the associated assemblies of the fan and motor below, upon tensioning the tightening element.
It has been observed that personnel who use these suspension rods are tempted to drive the wires through the linear portion of the slit itself, rather than guiding them from the exterior into the interior of the shaft through the circular portion of the

slit. The wires being larger in size than the slit provided, leads to temporary expansion by force, thereby causing stress in the suspension rod. This stress over a long period of time culminates into failure of the design, thereby leading to dangerous situations wherein the suspension rod gives way, thereby dislodging the ceiling fan from its suspended position.
Objects of the Invention:
An object of the invention is to provide eliminate undue stresses in a suspension rod of a fan.
Another object of the invention is to eliminate the risk of damage to suspension rod of fan due to unauthorized installation.
Yet another object of the invention is to provide a safe and damage free suspension rod for a ceiling fan.
Summary of the Invention:
According to this invention, there is provided a suspension rod for a ceiling fan comprises:
a. shaft adapted to hold said fan;
b. at least a pair of laterally located linear slits on said shaft, said pair being
located diametrically opposite to each other, and said slit having its starting
point at operative bottom of said shaft and having its end point at operative
point located at a pre-defined distance on said shaft;

c. at least a pair of corresponding circular slits (located above said pair of linear slits, characterized in that, said circular slits are spaced apart from said linear slits, adapted to provide a point of entry for electrical cables from exterior of said shaft to interior of said shaft, said spacing preventing wire entry from said linear slits, thereby preventing faulty insertions and stresses therefore.
Typically, said rod comprises another pair of circular slits at the operative bottom of said shaft, said pair of circular slits being located diametrically opposite to each other.
Brief Description of the Accompanying Drawings:
The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates a schematic of the suspension rod for a ceiling fan.
Detailed Description of the Accompanying Drawings:
According to this invention, there is provided a suspension rod for a ceiling fan.
Figure 2 illustrates a schematic of the suspension rod (200) for a ceiling fan, according to this invention.
In accordance with an embodiment of this invention, there is provided a shaft (22) adapted to hold said fan.

In accordance with another embodiment of this invention, there are provided at least a pair of laterally located linear slits (24) on said shaft, said pair being located diametrically opposite to each other, and said slit having its starting point at operative bottom of said shaft and having its end point at operative point located at a pre-defined distance on said shaft.
In accordance with yet another embodiment of this invention, there is provided at least a pair of corresponding circular slits (26) located above said pair of linear slits, spaced apart from said linear slits, adapted to provide a point of entry for electrical cables from exterior of said shaft to interior of said shaft.
In accordance with still another embodiment of this invention, there is provided another pair of circular slits (28) at the operative bottom of said shaft, said pair of circular slits being located diametrically opposite to each other. Typically, tightening elements are provided at said another pair of circular slits in order to provide a closure with respect to the slit in said shaft, for gripping said fan and its associated assemblies in a suspended position.
This helps to avoid any chances of breakage during wrong assembly of suspension system of the fan. This serves as poke yoke to avoid any damages. Here, the person performing the assembly cannot open the split ends (30) easily and hence avoids chances of cracks that happen near the wire entry holes (26) on the suspension rod.

We claim,
1. A suspension rod for a ceiling fan comprising:
a. shaft adapted to hold said fan;
b. at least a pair of laterally located linear slits on said shaft, said pair being
located diametrically opposite to each other, and said slit having its starting
point at operative bottom of said shaft and having its end point at operative
point located at a pre-defined distance on said shaft;
c. at least a pair of corresponding circular slits (located above said pair of
linear slits,
characterized in that, said circular slits are spaced apart from said linear slits, adapted to provide a point of entry for electrical cables from exterior of said shaft to interior of said shaft, said spacing preventing wire entry from said linear slits, thereby preventing faulty insertions and stresses therefore.
2. A suspension rod as claimed in claim 1 wherein, said rod comprises another pair of circular slits at the operative bottom of said shaft, said pair of circular slits being located diametrically opposite to each other.