Centenary of Electric Lightbulb
Technical Data
| Date of Issue | October 21, 1979 |
|---|---|
| Denomination | Rs. 1 |
| Quantity | 2,000,000 |
| Perforation | comb 13¼ |
| Printer | Security Printing Press, Nashik |
| Watermark | No Watermark |
| Colors | Purple |
| Catalog Codes |
Michel IN 800 Stamp Number IN 828 Yvert et Tellier IN 597 Stanley Gibbons IN 946 |
| Themes | Anniversaries and Jubilees | Electricity | Inventions |
Thomas Alva Edison, renowned as one of America’s greatest inventors, left an indelible mark on history with his groundbreaking innovations. Born in Milan, Ohio, on February 11, 1847, Edison’s curiosity and ingenuity led him to explore a wide range of interests throughout his lifetime.
Among his most famous inventions are the phonograph and the incandescent lamp. However, it was his tireless experimentation and determination that truly set him apart. After numerous failed attempts and an investment of over $40,000, Edison finally succeeded in creating the incandescent lamp on October 21, 1879, at his laboratory in Menlo Park, New Jersey. This achievement, where a loop of carbonized cotton thread glowed within a vacuum glass bulb for over 40 hours, marked a monumental breakthrough in lighting technology.
Edison’s contributions didn’t stop there. Over his 84-year lifespan, he patented over 1000 inventions, fundamentally altering the way humanity lived. His work extended beyond the electric lamp, encompassing methods for generating and distributing electricity, including the pioneering three-wire system.
In 1883, Edison patented the “Edison effect,” a precursor to the electron tube, further cementing his status as a pioneer in electronics. The electric bulb revolutionized both technical and social development, becoming a ubiquitous fixture in households worldwide.
The evolution of the electric bulb continued, with advancements such as the halogen lamp, boasting increased luminous efficacy. The impact of the incandescent lamp reverberated throughout industries, driving further innovation in the use of electricity.
Indeed, the electric lamp has illuminated the lives of millions, embodying Edison’s vision of “Light for everybody.” The Posts and Telegraphs Department recognized Edison’s monumental contribution by issuing a special postage stamp commemorating the centenary of his invention of the electric light lamp. This stamp pays homage to a visionary whose innovations continue to shape the modern world.