What is a jump hour?
As a brief introduction, a jumping hour watch is one that does not feature a traditional hour hand that sweeps the dial once every 12 (or 24) hours, but instead has a disc viewed through an aperture on the dial that jumps to display the next hour precisely as the minute hand reaches 60 minutes.
Who invented the jump hour watch?
engineer Josef Pallweber
But the first mass-produced jump hour movement existed nearly four decades before the first Trench was strapped to a wrist. In 1883, Austrian engineer Josef Pallweber filed the first patent for a jump hour movement on a pocket watch.
What is a retrograde complication?
A retrograde dial is a rather difficult complication, as the hand needs to move gradually in a particular direction along the arc, and then upon reaching the end of it, needs to suddenly jump back to the beginning.
What is a retrograde dial?
A Retrograde Dial displays a function in a linear fashion, as opposed to a circular fashion as seen in the case of sub-dials. A retrograde dial is mostly in the shape of an arc and can display functions like date, day, power reserve and more.
What is a retrograde indicator?
In short, Retrograde is an indication where the corresponding hand moves backwards or counterclockwise.
What is a retrograde mechanism?
Retrograde signaling in biology is the process where a signal travels backwards from a target source to its original source. For example, the nucleus of a cell is the original source for creating signaling proteins. During retrograde signaling, instead of signals leaving the nucleus, they are sent to the nucleus.
What is happening to Mercury?
Mercury and Venus appear to go retrograde when they lap us. Because Mercury completes its orbit around the Sun in only 88 days, the Swift Planet becomes retrograde three or four times in a calendar year, for about three weeks at a time. Outer planets have less frequent, but longer-lasting, periods of retrograde motion.
What is a retrograde function?
Which neurotransmitter can act as a retrograde messenger?
The retrograde neurotransmitter, nitric oxide (NO) is a soluble gas that can readily diffuse through various cell membranes. Nitric oxide synthase is the enzyme responsible for the synthesis of NO in various presynaptic cells.