FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Mechanism for Engaging and Disengaging the Manual Mode for a Motor Operated Automobile Side Window Glass"
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
INVENTORS
Abraham Gibi G, Gangurde Mangesh
And Jethawa Ruthesh
All are Indian nationals
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 its to be is performed.

FIELD OF INVENTION
The present invention is related to the window winding mechanism for an automobile and more specifically it relates to a user friendly mechanism for engaging and disengaging the manual mode for a motor operated side window glass of an automobile.
BACKGROUND OF INVENTION
The existing power window mechanism in an automobile comprises of an electric motor that operates a worm shaft. The worm shaft in turn rotates a gear which is attached to a pulley. A cable is wound over the pulley; a clip that attaches to the window glass is fixed on the cable. When the pulley turns, the clip moves up and down carrying the glass along with it.
However this mechanism being provided in vehicles today does not have any alternate means to operate the window glasses in case the power supply to the motor fails. Incidents of passengers getting trapped in the vehicle in events like flood have occurred in the past. Thus, there is a need for a manual operating mode for this mechanism.
Though inventions in the past have addressed this issue by incorporating a manual mode by simple modifications to the existing system, they lack a convenient means for the user to engage and disengage the manual mode. In some of these inventions the handle provided for operating the window in manual mode needs to be carried in the vehicle tool kit; the user must get the handle from the toolkit and fix it on the mechanism before operating it. Thus, there is a need for the present invention that provides the user with a convenient means to engage and disengage the manual mode.
SUMMARY OF INVENTION
The invention describes a mechanism for engaging and disengaging the manual mode of a motor operated window glass for vehicles, said mechanism comprising;

at least one drive gear (1); a sleeve (2) for fixedly mounting said drive gear (1); at least one driven gear (3) connected to the worm shaft of the window glass operating motor, said driven gear (3) is operably coupled to said drive gear (1) in manual mode; a rotating shaft (4) disposed in said sleeve (2) ; at least one bearing (5) for rotatably mounting of said rotating shaft (4); at least one pin (6) mounted on said sleeve (2) for locking and unlocking of said sleeve (2) with said rotating shaft (4); a first plunger assembly (7) disposed on said rotating shaft (4) for facilitating manual operated mode; at least one operating device (8) fixed on said sleeve (2) provided for manual operated mode; a second plunger assembly (9) mounted on the said sleeve (2) adapted for facilitating motor operated mode; at least one resilient means (10) disposed on said rotating shaft (4) for detaching said drive gear out of mesh from driven gear upon disengagement of manual mode.
The operating device (8) is a handle configured for engaging said manual operated mode by meshing drive gear (1) with driven gear (3). The first plunger assembly (7) is disposed in a hole provided on said rotating shaft (4) for engaging a stepped hole provided on the said sleeve (2) on application of axial force on operating device (8) towards door panel to lock said sleeve (2) with said rotating shaft (4). The handle (8) is adapted for rotating said shaft (4) with said sleeve (2) along with drive gear (1) which is meshed with said driven gear (3) enabling the manual operated mode. The rotating shaft comprises a keyway (11) in which said pin (6) is slidably disposed to stop against the ends of said keyway (11) for preventing any relative rotary motion between said sleeve (2) and said rotating shaft (4) and for constant alignment of locking and unlocking arrangement.
The second plunger assembly (9) is adapted to be located above said stepped hole provided on the said sleeve 2 and pressing of said second plunger assembly (9), said first plunger (7) is pushed out of said stepped hole which unlocks said sleeve 2 and said rotating shaft 4 enabling said resilient means (10) to push said sleeve 2 thereby disengaging said drive gear(l) from the said driven gear(3) to facilitate

disengaging of said manual operated mode. The first and second plunger assemblies are spring loaded.
The resilient means (10) is a helical spring concentrically disposed in compression on said rotating shaft (4) for detaching said drive gear (J) out of mesh from said driven gear (3) and adapted to place the manual operated mode to its original position once disengaged.
STATEMENT OF INVENTION
Accordingly the present invention describes a mechanism for engaging and disengaging the manual mode of a motor operated window glass for vehicles, said mechanism comprising;
at least one drive gear (1);
a sleeve (2) for fixedly mounting said drive gear (1);
at least one driven gear (3) connected to the worm shaft of the window glass operating motor, said driven gear (3) is operably coupled to said drive gear (1) in manual mode;
a rotating shaft (4) disposed in said sleeve (2);
at least one bearing (5) for rotatably mounting of said rotating shaft (4);
at least one pin (6) mounted on said sleeve (2) for locking and unlocking of said sleeve (2) with said rotating shaft (4);
a first plunger assembly (7) disposed on said rotating shaft (4) for facilitating manual operated mode;
at least one operating device (8) fixed on said sleeve (2) provided for manual operated mode;
a second plunger assembly (9) mounted on the said sleeve (2) adapted for facilitating motor operated mode;
at least one resilient means (10) disposed on said rotating shaft (4) for detaching said drive gear out of mesh from driven gear upon disengagement of manual mode.

BRIEF DESCRIPTION OF INVENTION
A handle is provided on the door panel at a convenient location for operating the window in manual mode. To engage the manual mode, the user just needs to press the handle towards the door panel. The manual mode gets engaged and the handle will get locked in this position. Rotating the handle in this state operates the window in manual mode. To disengage the manual mode, the user has to push a pin provided by the side of the handle. The handle will pop back disengaging the manual mode. The handle is detached from the rest of the mechanism in this state and so operating the window in power operated mode in this state will not rotate the handle.
It is to be understood that both the foregoing general description and the following detailed description are not limiting but are intended to provide further explanation of the invention claimed. The accompanying drawings, which are incorporated in and constitute part of this specification, are included to illustrate and provide a better understanding of the method and system of invention. Together with the description, the drawings serve to explain the principles of the invention.
BRIEF DESCRIPTION OF DRAWINGS
Figure-1 shows the mechanism when the window glass is in motor operated mode. Figure-2 shows the mechanism when the window glass is in manual operated mode.
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 refering to figure-01 and -02 , In accorcance with the present invention, mechanism for engaging and disengaging the manual mode for a motor operated

side window glass, said mechanism comprises; a rotating shaft (4), a bearing (5) on which said rotating shaft (4) is rotatably mounted , a sleeve (2) mounted on the said rotating shaft (4) , a drive gear (1) fixed on said sleeve (2), a pin (6) mounted on said sleeve (2), a keyway (11) cut on the said rotating shaft (4), first spring loaded plunger (7) which sits in a hole drilled in said rotating shaft (4), a second spring loaded plunger (9) mounted on the said sleeve (2), a helical spring (10), a handle (8) fixed on the sleeve (2), a driven gear (3) connected to the worm shaft of the motor that operates window glass when in power mode. The said spring loaded plunger 9 is used to disengage the manual mode. Said helical spring 10 detaches said drive gear 1 and said driven gear 3 out of mesh when manual mode is disengaged. Said pin 6 rides in the said keyway 11.
Referring to figure-01, which shows the mechanism when the window is in motor operated mode, the said drive gear 1 and said driven gear 3 are not meshed and therefore the mechanism does not interfere with the normal operation of the power window. The location of said handle 8 is outside the door panel. Said door handle 8 is stationary when the window glass is operated using motor.
Figure-02, shows the mechanism when the window is in manual operated mode. The manual operated mode is achieved by pushing the said handle 8 towards the door panel. The said drive gear 1 fixed on the said sleeve 2 moves and meshes with the said driven gear 3. The said pin 6 which is provided on the said sleeve 2 slides in the said keyway 11 provided on the said rotating shaft 4. The said first spring loaded plunger 7 disposed in the said rotating shaft 4 engages a stepped hole provided on the said sleeve 2 and locks the said sleeve 2 and said rotating shaft 4 together in this position.
When the said handle 8 is rotated, the said rotating shaft 4 rotates in said bearing 5 along with the said drive gear 1 fixed on the said sleeve 2. The rotation of said drive gear (1) which is now meshed with the said driven gear 3 rotates the said

driven gear 3 which is fixed on the worm shaft of motor. This enables to operate the window glass.
The manual mode of operation of said override mechanism is disengaged by pressing the said second plunger 9. The said second plunger 9 is located above the said stepped hole provided on the said sleeve 2. When the said second plunger 9 is pressed, the said first plunger 7 is pushed out of the said stepped holes on the said sleeve 2 thereby unlocking the said sleeve 2 and said rotating shaft 4. Said helical spring 10 pushes the said sleeve 2 out thereby disengaging the said drive gear 1 from the said driven gear 3. The said pin 6 mounted on the said sleeve 2 rides in the said keyway slot 11 provided on the said rotating shaft 4 till the said pin 6 stops against the end of the slot. The said pin 6 and slot arrangement also prevents any relative rotation between the said sleeve 2 and the said rotating shaft 4 thereby keeping the locking and unlocking arrangement of the said sleeve 2 and said rotating shaft 4 always in alignment.
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 mechanism for engaging and disengaging the manual mode of a motor
operated window glass for vehicles, said mechanism comprising;
at least one drive gear (1);
a sleeve (2) for fixedly mounting said drive gear (1);
at least one driven gear (3) connected to the worm shaft of the window glass operating motor, said driven gear (3) is operably coupled to said drive gear (1) in manual mode;
a rotating shaft (4) disposed in said sleeve (2);
at least one bearing (5) for rotatably mounting of said rotating shaft (4);
at least one pin (6) mounted on said sleeve (2) for locking and unlocking of said sleeve (2) with said rotating shaft (4);
a first plunger assembly (7) disposed on said rotating shaft (4) for facilitating manual operated mode;
at least one operating device (8) fixed on said sleeve (2) provided for manual operated mode;
a second plunger assembly (9) mounted on the said sleeve (2) adapted for facilitating motor operated mode;
at least one resilient means (10) disposed on said rotating shaft (4) for detaching said drive gear out of mesh from driven gear upon disengagement of manual mode.
2. The mechanism as claimed in claim 1, wherein said operating device (8) is a handle configured for engaging said manual operated mode by meshing drive gear (1) with driven gear (3).
3. The mechanism as claimed in claim 1, wherein said first plunger assembly (7) is disposed in a hole provided on said rotating shaft (4) for engaging a stepped hole

provided on the said sleeve (2) on application of axial force on operating device (8) towards door panel to lock said sleeve (2) with said rotating shaft (4).
4. The mechanism as claimed in claim 1, wherein said handle (8) is adapted for rotating said shaft (4) with said sleeve (2) along with drive gear (1) which is meshed with said driven gear (3) enabling the manual operated mode,
5. The mechanism as claimed in claim 1, wherein said rotating shaft comprises a keyway (11) in which said pin (6) is slidably disposed to stop against the ends of said keyway (11) for preventing any relative rotary motion between said sleeve (2) and said rotating shaft (4) and for constant alignment of locking and unlocking arrangement.
6. The mechanism as claimed in claim 1, wherein said second plunger assembly (9) is adapted to be located above said stepped hole provided on the said sleeve 2 and pressing of said second plunger assembly (9), said first plunger (7) is pushed out of said stepped hole which unlocks said sleeve 2 and said rotating shaft 4 enabling said resilient means (10) to push said sleeve 2 thereby disengaging said drive gear(l) from the said driven gear(3) to facilitate disengaging of said manual operated mode.
7. The mechanism as claimed in claim 1, wherein said first and second plunger assemblies are spring loaded.
8. The mechanism as claimed in claim 1, wherein said resilient means (10) is a helical spring concentrically disposed in compression on said rotating shaft (4) for detaching said drive gear (1) out of mesh from said driven gear (3) and adapted to place the manual operated mode to its original position once disengaged.

9. The mechanism for engaging and disengaging the manual mode for a motor operated side window glass substantially as herein described with reference to the accompanying drawings.