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 kitchen appliance with a fuzzy controlled motor
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR
Gawali Nilesh and Samsul Ekram, both of Crornpton Greaves Limited, Electronic Development Center, CG Global R&D Centre, Kanjur Marg (E), Mumbai, 400 042 Maharashtra, India; both Indian Nationals.
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 intelligent appliances.
Particularly, this invention relates to a kitchen appliance with a fuzzy controlled motor.
Background of the Invention:
A mixer or a grinder or a blender or a crusher or a churner are all kitchen appliances which incorporate the use of a motor which provide drive force to a set of blades in a vessel for the intended corresponding purposes of mixing, grinding, blending, crushing, churning. The two parameters that can be varied are the speed of rotation of the blades and the time for which the blades need to be rotated.
Furthermore, the motor's power is defined as each appliance is integrated with a rated motor for the purpose. Thus, motor for blending has relatively less rated power, while motor for crushing has relatively more rated power. For the purpose of the intended operation, constant user vigilance is required to overlook the process. Moreover, judgement of the user comes into play as the user has to iteratively judge the time and speed required to achieve the intended mixture.
If a person intends to make slush out of cubes of ice, the user needs to judge when to stop the crusher, lest all the ice melts away. If a user needs to make a highly viscous grainy paste out of edible ingredients, the user should be able to stop well before the grains turn fine and blended. This parameter of judgement is not repetitive.

There is a need for a better kitchen appliance which incorporates multiple processes of mixing, grinding, blending, crushing, churning and the like.
Objects of the Invention:
An object of the invention is to provide a multipurpose intelligent kitchen appliance.
Another object of the invention is to provide a kitchen appliance with a plurality of options of grinding, blending, crushing, mixing, churning along with options of material quality.
Yet another object of the invention is to provide a kitchen appliance which eliminates user judgement.
Still another object of the invention is to provide an automatic kitchen appliance which does not require human supervision.
Another object of the invention is to provide operation and operator safety, not resulting into hazardous situations in a supervision-less operation.
Summary of the Invention:
According to this invention, there is provided a kitchen appliance with fuzzy controlled motor, said appliance comprising:
a. motor adapted to be connected with a set of blades in a vessel in order to drive said blades in said vessel for one of pre-defined purposes, said motor

operation being variable in relation to speed parameters and time parameters;
b. first input means adapted to allow a user to provide an input in relation to the
function to be performed in relation to said pre-defined purpose;
c. second input means adapted to allow a user to choose the type of ingredients
from a range of preset types in relation to said pre-defined purpose;
d. database of preset time-speed varying fuzzy functions in order to control
said motor in relation to the combination of selected inputs from said first
input means and said second input means, said time-speed varying functions
being designed such that said motor is adapted to achieve a preset speed in a
pre-defined amount of time, and maintain it or vary it in accordance with
said functions selected from said database;
e. controller with a continuously varying speed mechanism adapted to change
the speed of said motor in relation to said selected function; and
f. comparator means adapted to compare instantaneous voltage of motor with
defined voltages from said selected function from said database, thereby
providing a signal to said controller with a continuously varying speed
mechanism in order to achieve said speed and time parameters by varying
voltage to said motor.
Typically, said first input means is a defined first input means adapted to allow a user to select one of pre-defined purposes from mixing, grinding, crushing, blending, churning.

Typically, said second input means is a defined second input means adapted to allow a user to select one of the types of material from 'hard', 'medium', or 'soft' types.
Typically, said continuously varying speed mechanism is a fuzzy controlled mechanism as defined in a fuzzy function set adapted as per the output condition such as current load on a motor.
Typically, said controller includes a monitoring means adapted to control the operation of said appliance under pre-defined safe operable limits of permitted output power delivered to said motor continuously for given operation time.
Typically, said appliance includes a n alarm generation means adapted to generate audio/visual status alarms signals to inform a user of pre-defined malfunction of said controller in relation to speed and time in correlation with said controller output.
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 flow diagram of the fuzzy controlled motor of the kitchen appliance.

Detailed Description of the Accompanying Drawings:
According to this invention, there is provided a kitchen appliance with fuzzy controlled motor.
Figure 1 illustrates a block schematic flow diagram of the fuzzy controlled motor of the kitchen appliance.
In accordance with an embodiment of this invention, there is provided a motor adapted to be connected with a set of blades in a vessel in order to drive said blades in said vessel for one of the purposes selected from mixing, grinding, crushing, blending, churning and the like. The speed of the motor and timing for which the motor is operable at that particular speed is variable. The speed of the motor determines the force exerted by the blades on the ingredients to be mixed, ground, churned, crushed, blended or the like.
In accordance with another embodiment of this invention, there is provided a first input means (IPI) adapted to allow a user to provide an input in relation to the function to be performed. The function is typically selected from a range of preset functions such as mixing, grinding, crushing, churning, blending. Each of these functions requires a different force and time duration to be applied. As the action progresses the ingredients upon which the action is performed, alter their shape and consistency. Thus, the motor should adapt to the new consistency in order to obtain a desired output in accordance with the function selected measured as per the sensed motor parameters.

In accordance with yet another embodiment of this invention, there is provided a second input means (IP2) adapted to allow a user to choose the type of ingredients from a range of preset types. The types may be selected from 'hard', 'medium', or 'soft' types.
In accordance with still another embodiment of this invention, there is provided a database (D) of preset time-speed varying fuzzy functions in order to control said motor in relation to the combination of selected inputs from said first input means (IP1) and said second input means (IP2). The time-speed varying functions are designed such that the motor is adapted to achieve a preset speed in a predefined amount of time, and maintain it or vary it in accordance with the function stored in the database without violating the safe operating limits.
In accordance with still another embodiment of this invention, there is provided a controller with a continuously varying speed mechanism (SM) adapted to change the speed of the motor and blades with respect to the task that is to be achieved and with respect to the feedback achieved with respect to the function. The change is this mechanism is driven by the voltage supplied to the motor. Thus, as the voltage drops, the speed of the motor drops, and as the voltage rises, the speed of the motor picks up. The continuously varying speed mechanism is guided by a fuzzy controlled mechanism.
In accordance with an additional embodiment of this invention, there is provided a comparator means (CM) adapted to compare instantaneous voltage of motor with defined voltages from said database. If there is a voltage drop, it means that the speed of the motor has fallen, and additional voltage needs to be supplied in order

to achieve the desired higher speed. If there is a voltage drop, it means that the speed of the motor has risen, and voltage needs to be clipped in order to achieve the desired lower speed.
With continuous monitoring of voltage, the instantaneous speed can be ascertained. Hence, in correlation with the database values, the desired voltage can be achieved continuously. This ensures that a hard material to be crushed requires a definite speed for a definite time, and as the crushing action progresses and the material begins to get crushed, the speed can be reduced. This variation is speed, over a period of time, is pre-defined in the database. Apart from that, if the rated speeds at the rated durations of time are not achieved, the continuously varying speed mechanism (SM) aims to change the speed by varying the voltage, instantaneously.
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 kitchen appliance with fuzzy controlled motor, said appliance comprising:
a. motor adapted to be connected with a set of blades in a vessel in order to
drive said blades in said vessel for one of pre-defined purposes, said motor
operation being variable in relation to speed parameters and time
parameters;
b. first input means adapted to allow a user to provide an input in relation to the
function to be performed in relation to said pre-defined purpose;
c. second input means adapted to allow a user to choose the type of ingredients
from a range of preset types in relation to said pre-defined purpose;
d. database of preset time-speed varying fuzzy functions in order to control
said motor in relation to the combination of selected inputs from said first
input means and said second input means, said time-speed varying functions
being designed such that said motor is adapted to achieve a preset speed in a
pre-defmed amount of time, and maintain it or vary it in accordance with
said functions selected from said database;
e. controller with a continuously varying speed mechanism adapted to change
the speed of said motor in relation to said selected function; and
f. comparator means adapted to compare instantaneous voltage of motor with
defined voltages from said selected function from said database, thereby
providing a signal to said controller with a continuously varying speed
mechanism in order to achieve said speed and time parameters by varying
voltage to said motor.

2. An appliance as claimed in claim 1 wherein, said first input means is a defined first input means adapted to allow a user to select one of pre-defined purposes from mixing, grinding, crushing, blending, churning.
3. An appliance as claimed in claim 1 wherein, said second input means is a defined second input means adapted to allow a user to select one of the types of material from 'hard', 'medium', or 'soft' types.
4. An appliance as claimed in claim 1 wherein, said continuously varying speed mechanism is a fuzzy controlled mechanism.
5. An appliance as claimed in claim 1 wherein, said controller includes a monitoring means adapted to control the operation of said appliance under pre¬defined safe operable limits of permitted output power delivered to said motor continuously for given operation time.
6. An appliance as claimed in claim 1 wherein, said appliance includes a n alarm generation means adapted to generate audio/visual status alarms signals to inform a user of pre-defined malfunction of said controller in relation to speed and time in correlation with said controller output.