The earliest concept of an electronic cigarette can be traced to an idea by Herbert A. Gilbert, who in 1963 patented a device described as “a smokeless non-tobacco cigarette” that involved replacing burning tobacco and paper with heated, moist, flavored air. This device heated the nicotine solution and produced steam. In 1967, Gilbert was approached by several companies interested in manufacturing it, but it was never commercialized and disappeared from the public record after 1967. Almost 3 decades later a pharmacist in China named Hon Lik designed the first e-cigarette that was marketed by “Golden Dragon Holdings”, where Mr. Hon Lik worked as an employee.Later “Golden Dragon Holdings” became “Ruyan” which means ‘resembling smoking’.With the invention of the first generation electronic cigarette.In 2000, he came up with the ideas of using a piezoelectric ultrasound-emitting element to vaporize a pressurized jet of liquid containing nicotine diluted in a propylene glycol solution. This design produces a smoke-like vapor that can be inhaled and provides a path for nicotine delivery into the bloodstream via the lungs. These inventions are the basis of the present-day electronic cigarettes.
Usually an e-cigarette has the following four components:
Most portable power units contain a lithium-ion rechargeable battery and makes the largest component of an electronic cigarette. This may contain an electronic airflow sensor so that activation is triggered simply by drawing breath through the device. Other models come with a power switch, which must be held during operation.
A LED to announce activation may also be equipped in the front of power unit casing
liquid for producing vapor in electronic cigarettes, known as e-juice or e-liquid, is a solution of propylene glycol (PG), vegetable glycerin (VG), polyethylene glycol 400 (PEG400) mixed with concentrated flavors, and optionally, a variable percent of a liquid nicotine concentrate.
They are often sold in a bottle or as pre-filled disposable cartridges. Many manufacturers offer dozens of flavors which resemble the taste of regular tobacco, menthol, vanilla, coffee, cola and various fruits, but nicotine concentrations vary by manufacturers. Nicotine-free solutions are also common.
The cartridge, a small plastic container with openings on each end, serves as both a liquid reservoir and mouthpiece. Most models adopt a plastic sponge to keep the liquid in place, but it is also common to use a refillable tank to hold the liquid, with a separate tunnel connecting to the atomizer. When the liquid is depleted, users can refill it or replace with another pre-filled cartridge.
The atomizer contains a small heating coil that vaporizes the liquid, and generally consists of a simple filament and wicking metal mesh or silica wick to draw the liquid in. The atomizer’s filament will lose efficiency over time due to a buildup of sediment, or “burns out” entirely, requiring replacement. In some models, the cartridge and atomizer component are integrated, known as a cartomizer.
Though the companies producing and marketing e-cigarette, claim it to be a nicotine free, harmless, and a healthy alternative to normal cigarettes, but there has been a controversy going for long regarding the safety and efficiency of electronic cigarettes over conventional cigarettes. Whether modern e-cigarettes is really an effective and healthy replacement for normal Cigarettes or just another gimmick to play with peoples mind.