Whois & Analysis for northerntool.com

A machine is a tool containing one or more parts that uses energy to perform an intended action.

Machines are usually powered by chemical, thermal, or electrical means, and are often motorized.

Historically, a power tool also required moving parts to classify as a machine.

However, the advent of electronics has led to the development of power tools without moving parts that are considered machines.

A power tool is a tool that is actuated by an additional power source and mechanism other than the solely manual labour used with hand tools.

The most common types of power tools use electric motors.

Internal combustion engines and compressed air are also commonly used.

Other power sources include steam engines, direct burning of fuels and propellants, or even natural power sources like wind or moving water.

Tools directly driven by animal power are not generally considered power tools.

Heating, ventilation and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort.

Its goal is to provide thermal comfort and acceptable indoor air quality.

HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer.

Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).

In electricity generation, a generator is a device that converts mechanical energy to electrical energy for use in an external circuit.

Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines and even hand cranks.

The first electromagnetic generator, the Faraday disk, was built in 1831 by British scientist Michael Faraday.

Generators provide nearly all of the power for electric power grids.

A hand tool is any tool that is not a power tool – that is, one powered by hand (manual labour) rather than by an engine.

Some examples of hand tools are garden forks, secateurs, rakes, hammers, spanners, pliers, screwdrivers and chisels.

Hand tools are generally less dangerous than power tools.