Depending on the time period, cars have had various types of indicators, e.g.
In 1889 E. Martin was one of the earliest inventors/designers of vehicle braking indicators. His idea was of a board at the back of the car upon which the word STOP was written but hidden behind flaps. The action of using the brakes would open the flaps and those following could read the STOP notice.
TURN INDICATORS
In 1893 J. B. Freeman had a text-roller at the back of his car bearing the words
The roller could be rotated with a cord and pulley system to indicate to following vehicles the direction to which he was about to turn.
Around this time others were also making left/right mechanical arms that the driver could operate. The arms mimicked the use of hand/arm signals that drivers would otherwise have used to indicate the direction to which the car was about to be turned.
Around 1905 F. Berger added pneumatic power to these semaphore arms, which were also 'pneumatically' self-cancelling.
In 1907 a patent was applied for by Percy Douglas-Hamilton for his electrically lit 'hand-shaped' signs which would indicate the car driver's left/right intentions. The patent was granted in 1909. (U.S. patent number 912831)
With regard to the mechanical semaphore system, in 1908 Alfredo G. Barrachini (Rome) put small electric bulbs in the arms so that they glowed. Although primarily cable operated, the arms could also be moved/powered electrically.
Florence Lawrence (Canadian) also invented a turn indicator for cars in about 1914, but she did not correctly patent her invention.
In 1918 the Naillik Motor Signal Company (Boston) invented the first 'totally electric' signals, using small electric motors to move the arms.
In 1929 Oscar J. Simler (American) patented a turn indicator after stealing the invention from a northern British man.
In 1935 a company in the United States invented a flashing turn indicator.
A Buick was the first production car to be fitted with an electrical turn indicator in 1938.
For references and more information, see Related linksbelow.
but other cars uses the indicators how? but why we cant use the indicators
No, cars were invented at the end of the 1800s
Henry Ford invented Ford cars.
No, cars were not invented in the thirteenth century, they were actually invented in the seventeenth century.
cars were first invented in the late 19th century
No,you can't and whats the point!!
German scientist Emil Wiechert invented the seismograph around the beginning of the 20th century.
mechanical cars
The answer is: julia dela cruz she invented toy cars in 1958 with her dad
Hmm...cars being invented sounds like a Wednesday thing....?
There are several indicators of problems with a cars transmission. Examples of these include lack of response while driving and leaking transmission fluid.
No one invented classic cars. In general, cars over the age of 25 years are considered antique or classic.