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Frohman's Motor

Frohman's MotorElectric motor was created by Paul Gustave Frohman in 1844. It was one of the first motors used in industry. Its design is as follows: voltage is applied to electric magnets that draw iron bars installed at the rotating cage. After an iron bar reaches the same level as an electric magnet, the motor stops generating current until one more iron bar is within a reach. This motor includes a switch to switch on/off the electric magnet.Such motor has two distinctive features. It does not transform power into mechanical energy through as reciprocating motors do. Power capacity enables to use such motors for industrial purposes. Note that this motor could yield 1.5 kW; only the lack of a cheap power source restrained its distribution across industries. After such power source has been discovered, motors became widely used in manufacturing. Moreover, in 19th century Frohman's motors combined with a small pump were often used in laboratories to demonstrate energy transformation processes.

Категория: Science & Technology

Время: 00:01:00

Теги: electric motor electrical engineering history of technics

Dov Frohman Inducted into the National Inventor's Hall of Fame

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37th Annual National Inventors Hall of Fame Induction Ceremony at the Computer History Museum; Mountain View, California; May 2, 2009

Категория: Science & Technology

Время: 00:03:12

Теги: dov frohman leadership the hard way

Denice Frohman- "Gangsta Poetry"

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Denice Frohman (aka Ms. Misconception) performs "Gangsta Poetry" for the Rainbow Collective in Union Square (NYC)

Категория: Entertainment

Время: 00:03:09.750

Теги: ms. misconception denice frohman spoken word poetry gangsta rainbow collective

Denise Frohman Summer Music Series July 17 web

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Категория: Entertainment

Время: 00:07:16.500

Теги: Denise Frohman Summer Music Series July 17 web

Denice Frohman & Ms. Wise - "American Dream"

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Debuted at the PHILADELPHIA GLBT ARTS FESTIVAL 2009 as part of their spoken word showcase

Категория: Entertainment

Время: 00:04:24.750

Теги: denice frohman ms. wise misconception spoken word traverse theater GLBT arts festival philadelphia ppp

CBS 3 "UnLitter Us" Interview - Poet, Denice Frohman

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Poet, Denice Frohman (aka Ms. Misconcepton) appears on CBS 3 "Talk Philly" on April 1, 2010 with Philadelphia Streets Commissioner Clarena Tolson to discuss the city's effort to build a cleaner and safer Philadelphia. "UnLitter Us" is the first sustained public service campaign to rid Philadelphia of litter once and for all utilizing the words of local spoken word artists to unveil the beauty of this city. Their powerful voices will turn apathy into action. Their words are featured in UnLitter Us messages on TV, radio, web and public transit all across the city. www.philadelphiastreets.com.

Категория: News & Politics

Время: 00:02:56.250

Теги: unlitter us campaign denice frohman ms. misconception poet philadelphia