Home > Terms > English (EN) > Franklin clock

Franklin clock

During visits to London in the late 18th century, Benjamin Franklin became friendly with James Ferguson, the famous astronomer and designer of orreries and astronomical clocks. Few of Ferguson's designs were built, but his ideas led Franklin to devise a clock with as few parts as possible. His clock has a dial divided into four segments marked 0-60 minutes for each segment, the whole series of twelve hour figures lying between four concentric rings. A single hand indicates the minutes and hours simultaneously, but not unambiguously as three hour figures are indicated. A later version employed a spiral groove with a steel ball to overcome the difficulty. The ball rested in the spiral to show the hours, being gradually moved to a hole in the center from which it fell by gravity through a tube behind the dial to the outer end of the spiral every twelve hours. Some of Franklin's clocks also indicated seconds on a dial in the arch of the clock. Ferguson made a number of variations based on Franklin's design, some going for one day and one going for a week, but without seconds indication.

  • Part of Speech: noun
  • Synonym(s):
  • Blossary:
  • Industry/Domain: Chronometry
  • Category: Clock
  • Company:
  • Product:
  • Acronym-Abbreviation:
Collect to Blossary

Member comments

You have to log in to post to discussions.

Terms in the News

Billy Morgan

Sports; Snowboarding

The British snowboarder Billy Morgan has landed the sport’s first ever 1800 quadruple cork. The rider, who represented Great Britain in the 2014 Winter Olympics in Sochi, was in Livigno, Italy, when he achieved the man-oeuvre. It involves flipping four times, while body also spins with five complete rotations on a sideways or downward-facing axis. The trick ...

Marzieh Afkham

Broadcasting & receiving; News

Marzieh Afkham, who is the country’s first foreign ministry spokeswoman, will head a mission in east Asia, the state news agency reported. It is not clear to which country she will be posted as her appointment has yet to be announced officially. Afkham will only be the second female ambassador Iran has had. Under the last shah’s rule, Mehrangiz Dolatshahi, a ...

Weekly Packet

Language; Online services; Slang; Internet

Weekly Packet or "Paquete Semanal" as it is known in Cuba is a term used by Cubans to describe the information that is gathered from the internet outside of Cuba and saved onto hard drives to be transported into Cuba itself. Weekly Packets are then sold to Cuban's without internet access, allowing them to obtain information just days - and sometimes hours - after it ...

Asian Infrastructure Investment Bank (AIIB)

Banking; Investment banking

The Asian Infrastructure Investment Bank (AIIB) is an international financial institution established to address the need in Asia for infrastructure development. According to the Asian Development Bank, Asia needs $800 billion each year for roads, ports, power plants or other infrastructure projects before 2020. Originally proposed by China in 2013, a signing ...


Online services; Internet

Spartan is the codename given to the new Microsoft Windows 10 browser that will replace Microsoft Windows Internet Explorer. The new browser will be built from the ground up and disregard any code from the IE platform. It has a new rendering engine that is built to be compatible with how the web is written today. The name Spartan is named after the ...

Featured Terms

Katrin Talan
  • 0


  • 0


  • 0


Industry/Domain: Geography Category: Geography

Khibiny Mountains

Khibiny (Russian: Хиби́ны) is one of the two main mountain ranges of the Kola Peninsula, Russia, within the Arctic Circle, located between Imandra and ...

Featured blossaries

Chocolate Brands

Category: Food   3 2 Terms

Hard Liquor's famous brands

Category: Food   2 11 Terms

Browers Terms By Category