Who invented gears

Gears were invented by the Greek mechanics of Alexandria in the third century B.C., were considerably developed by the great Archimedes, and saw wide use in the Roman world.

1. When was the first gear invented?
2. Where did the idea of gears come from?
3. Who invented gear boxes?
4. Did Greeks use gears?
5. How many teeth should a gear have?
6. Who invented the helical gear?
7. What is gear terminology?
8. Who invented gear train?
9. Who invented synchromesh gears?
10. Who invented the first automatic car?
11. What were the first type of gears developed?
12. Which gearbox is used in cars?
13. Which gear goes the fastest?
14. What is super gear?

When was the first gear invented?

Some historians believe gears date back to at least the 27^th century B.C. when they were used in a chariot in China. The ancient Greeks, including Aristotle, also described gear-like devices. Greek mathematician Hero of Alexandria was the first to write specifically about gears in 50 A.D.

Where did the idea of gears come from?

Gears are considered as one of the oldest equipment known to mankind. The origin of gears goes down to the Chinese South-Pointing Chariot in the 27^th Century B.C. This chariot was known to pointing to the south no matter how it was turned.

Who invented gear boxes?

Jumping forward to the 1920s, we find a genuine claimant to the title of being the inventor of the first automatic gearbox. Canadian Alfred Horner Munro ended up with the patent to back-up his claim, a Canadian patent in 1923 followed by similar in the UK (1924) and United States (1927).

Did Greeks use gears?

The ancient Greeks were using metal gears with cylindrical teeth in early computing equipment and astronomical calendars by 100 B.C.E. ... The mechanism was found in 1900 in a wreck near the Greek island of Antikythera. The device incorporated more than 30 gears for complicated astronomical calculations of time.

How many teeth should a gear have?

Good: 16 and 25 teeth. A bump on the large gear (eventually) hits every tooth on the small gear, wearing them all equally.

Who invented the helical gear?

Double helical gears, invented by André Citroën and also known as herringbone gears, overcome the problem of axial thrust presented by single helical gears by having teeth that set in a 'V' shape. Each gear in a double helical gear can be thought of as two standard, but mirror image, helical gears stacked.

What is gear terminology?

Basic Gear Terminology Face Width is the length of the teeth in the axial direction. Outside Diameter (O.D.) is the diameter of a circle around the outer surface, or tops of the gear teeth. ... Root Diameter (R.D.) is the diameter of a circle around the bottom (root) of the gear tooth spaces.

Who invented gear train?

Gears appear in works connected to Hero of Alexandria, in Roman Egypt circa AD 50, but can be traced back to the mechanics of the Alexandrian school in 3rd-century BC Ptolemaic Egypt, and were greatly developed by the Greek polymath Archimedes (287–212 BC).

Who invented synchromesh gears?

Earl Thompson. Earl A. Thompson, who as a youth in Portland invented the synchromesh transmission and later led development of the Hydra-Matic transmission will be honored in Detroit Wednesday by receipt of the Elmer A. Sperry Award.

Who invented the first automatic car?

Alfred Horner Munro, a Canadian steam engineer, designed the first automatic transmission in 1921 and patented the transmission in 1923. He created the automatic transmission with four forward gears and no reverse or parking gears, and he used air pressure instead of hydraulic fluid.

What were the first type of gears developed?

The first gears were made of wood, with wooden rods and teeth. Worn teeth could thus be replaced separately. By the year 100 v.C. the Greeks used metal gears with cylindrical teeth in complex computing equipment and astronomical calendars.

Which gearbox is used in cars?

Modern cars use helical gears and synchromesh devices in the gearboxes, that synchronize the rotation of gears that are about to mesh. This eliminates clashing of the gears and makes gear shifting easier.

Which gear goes the fastest?

Remember each car will be geared slightly differently, but a good rule of thumb for changing gears is that first gear is for speeds up to 10 mph, second gear is for speeds up to 15 mph, third gear is for speeds up to 35 mph, fourth gear is for speeds up to 55 mph, fifth gear is for speeds up to 65 mph, and sixth gear ...

What is super gear?

A spur gear is a gear with teeth that project outwards from a cylindrical surface. Two spur gears are used to transmit power between parallel shafts. In spur gears, the edge of each tooth is parallel to the axis of rotation and they mesh together when they are fitted to parallel shafts.