very early forms were long tubes with interchangerble lengths added to the mouth piece
Pocket trumpets, like normal trumpets, are most often keyed in Bb, but this doesn't mean that all pocket trumpets are in Bb.
I believe that F trumpets were used most widely in the late Classical/early Romantic periods (1800~1900).
trumpets were used in religious services as early as c. 2000 B.C.E. It is also know that two early trumpets were found in King Tutankhamen's tomb in Egypt (c. 1339 B.C.E.).
The crude construction of early trumpets didn't allow for the precise control of pitch required for producing music. The natural trumpets of the Medieval period were the first trumpets known to really be considered "musical" instruments.
They're like trumpets without valves.
the elephant
There does not seem to be a brand of trumpets called Cortley. There is a famous trumpet player with the last name of Courtley, but he does not make trumpets at this time (2014).
Perhaps - symphony, orchestra, band, quartet or trumpets etc.
Trumpets have been used for thousands of years, although they haven't always looked like the ones played today. For example, archeologists in South America recently discovered a trumpet fashioned from a sea shell thought to be at least 3,000 years old. Early trumpets were also made from hollow tree branches and the horns of cows and sheep. Eventually, craftsmen started making trumpets from metal, although the valve trumpet wasn't invented until the 19th century. Early trumpets were used mainly for signaling and for religious ceremonies. Trumpets weren't widely used to play music until the Middle Ages.
If you mean "reeds" no, trumpets do no use reeds. Some woodwind instruments use reeds, like the saxophone, clarinet, and oboe.
It sounds like trumpets horns and recorders
American-made trumpets began to gain prominence in the 19th century, particularly with the establishment of companies like C.G. Conn and Buescher in the late 1800s. These manufacturers played a significant role in developing high-quality brass instruments. By the early 20th century, American trumpets became widely recognized for their craftsmanship and innovation, leading to a golden age of trumpet manufacturing in the U.S. that continues to influence instrument design today.