CEILING FAN OBJECTIVE : To study the working, construction And troubleshooting of Ceiling Fan
2. INTRODUCTION A ceiling fan is a device suspended from the ceiling of a room, which employs hub- mounted rotating paddles to circulate air. First electrically powered fan was invented in 1882 by Philip Diehl. Crompton Greaves Ltd is the leading manufacturer of fans.
3. PRINCIPLE If a current carrying conductor is placed in a magnetic field it experience a force and start to rotate. The direction of rotation can be found by Fleming s Left Hand R ....etc

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construction and working of impatt diode pdf

Abstract

In many respects, the IMPATT diode structure is very similar to that of many other forms of diode, and in particular the standard PN junction diode or the Schottky diode.However the differences in its construction and fabrication mean that it is able to operate in its avalanche mode whether the transit time provides the negative resistance.
There is a variety of structures that are used for the IMPATT diode. All are variations of a basic PN junction and usually there is an intrinsic layer, ....etc

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lancashire boiler ppt download

It is a stationary, fire tube, internally fired boiler. The size is approximately from 7-9 meters in length and 2-3 meters in diameter.

Construction of Lancashire Boiler:
It consists of

Cylindrical shell
Furnace tubes, bottom flue and side flues
Grate
Fire bridge
Dampers

Cylindrical shell
It is placed in horizontal position over a brick work. It is partly filled up with water. The water level inside the shell is well above the furnace tubes.

Furnace tubes, bottom flue and side flues:
Two large internal furna ....etc

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To get full information or details of indian standard for boiler chimney construction please have a look on the pages

http://seminarsprojects.net/Thread-design-of-boiler-stack-full-report

if you again feel trouble on indian standard for boiler chimney construction please reply in that page and ask specific fields in indian standard for boiler chimney construction ....etc

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Working and construction of electric fan

An electric fan is an electric motor to which the blats are fixed so that then the motor of the fan rotates ,the balds through the air A D.C fan are of DC series motor in which the rotating part armature is connected in series with the stationary part and when the current is given to the motor , the magnetic field is set up in the field winding which experience a force in the armature to move it at right angle to the feed and balds attached with shaft of armature displaced the air. the same principle ....etc

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This type of gear box is similar to the constant mesh type in that all the gears on the main shaft are in constant mesh with the corresponding gears on the lay shaft. The gears on the lay shaft are fixed to it while those on the main shaft are free to rotate on the same. Its working is also similar to the constant mesh type, but in the former there is one definite improvement over the latter. This is the provision of synchromesh device which avoids the necessity of double declutching. The parts which ultimately are to be engaged are first broug ....etc

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sir please help to get a ppt of lanchashire boiler . ....etc

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pdf file download lancashire boiler

Lancashire Boiler :-Lancashire Boiler is a stationary,fire tube,internally fired, horizontal and natural circulation boiler. Lancashire boilers are reliable and bear over load. They are economical within their operating capacity. However, they are bulky and initially raise steam very slowly. Working pressure in lancashire boilers are in the range of 0.7 MPa to 2 MPa and efficiency of the boiler is about 65% 70%. Size of these boiler depends upon size of shell which may be 2 m to 3 m in diameter and 6m to 10 ....etc

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The Solex company was founded by Marcel Mennesson and Maurice Goudard to manufacture vehicle radiators. These were fitted to several makes of early cars including Delaunay-Belleville and buses of the Paris General Omnibus company.

After World War I, the radiator business went into decline and the company bought the rights to the carburetor patents of Jouffret and Ren e and named them Solex after their business.

The Solex brand is now owned by Magneti Marelli. The original Solex company changed its name in 1994 to Magneti Marelli France a ....etc

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Energy meters are the basic part to measure the power consumption. It is used everywhere, no matter how big or small consumption it is. It is also known as watt-hour meter. Here we discuss the construction and working principle of induction type energy meter.To understand the structure of watt-hour meter, we must understand the four essential components of the meter. These components are as follows:

Driving system

Moving system

Braking system

Registering system

Driving System

The components of this system are two silicon steel ....etc

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