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Zhang Heng (Chinese: Zhang Heng ; AD 78-139), formerly romanized as Chang Heng, was a Han Chinese polymath from Nanyang who lived during the Han dynasty. Educated in the capital cities of Luoyang and Chang'an, he achieved success as an astronomer, mathematician, scientist, engineer, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar. Zhang Heng began his career as a minor civil servant in Nanyang. Eventually, he became Chief Astronomer, Prefect of the Majors for Official Carriages, and then Palace Attendant at the imperial court.
Zhang Heng is often credited with inventing the first odometer, an achievement also attributed to Archimedes (c. 287-212 BC) and Heron of Alexandria (fl. AD 10-70). Similar devices were used by the Roman and Han-Chinese empires at about the same period. By the 3rd century, the Chinese had termed the device the ji li gu che, or "li-recording drum carriage" (the modern measurement of li = 500 m/1640 ft). Ancient Chinese texts describe the mechanical carriage's functions; after one li was traversed, a mechanically driven wooden figure struck a drum, and after ten li had been covered, another wooden figure struck a gong or a bell with its mechanically operated arm. However, there is evidence to suggest that the invention of the odometer was a gradual process in Han Dynasty China that centered on the "huang men"--court people (i.e. eunuchs, palace officials, attendants and familiars, actors, acrobats, etc.) who followed the musical procession of the royal "drum-chariot". There is speculation that at some time during the 1st century BC the beating of drums and gongs was mechanically driven by the rotation of the road wheels. This might have actually been the design of Luoxia Hong (c. 110 BC), yet by at least 125 the mechanical odometer carriage was already known, as it was depicted in a mural of the Xiao Tang Shan Tomb. The south-pointing chariot was another mechanical device credited to Zhang Heng. It was a non-magnetic compass vehicle in the form of a two-wheeled chariot. Differential gears driven by the chariot's wheels allowed a wooden figurine (in the shape of a Chinese state minister) to constantly point to the south, hence its name. The Song Shu (c. AD 500 ) records that Zhang Heng re-invented it from a model used in the Zhou Dynasty era, but the violent collapse of the Han Dynasty unfortunately did not allow it to be preserved. Whether Zhang Heng invented it or not, Ma Jun (200-265) succeeded in creating the chariot in the following century.

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It was a non-magnetic compass vehicle in the form of a two-wheeled chariot.

IN: Christian Ludolf "Buddy" Ebsen Jr. (April 2, 1908 - July 6, 2003) was an American actor and dancer, whose career spanned seven decades, including the role of Jed Clampett in the CBS television sitcom The Beverly Hillbillies (1962-1971) and the title character in the television detective drama Barnaby Jones (1973-1980), also on CBS. The SAG-AFTRA records also show him as Frank "Buddy" Ebsen. Originally a dancer, Ebsen began his long career in films in 1935, beginning with Jack Benny in Broadway Melody of 1936 (1935), Maureen O'Hara in They Met in Argentina (1941) and June Havoc in Sing Your Worries Away (1942). He also danced with child star Shirley Temple in Captain January (1936), released the same year.

Ebsen made his television debut on an episode of The Chevrolet Tele-Theatre in 1949. This led to television appearances in: Stars Over Hollywood, Gruen Guild Playhouse, four episodes of Broadway Television Theatre, Schlitz Playhouse of Stars, Corky and White Shadow, the H.J. Heinz Company's Studio 57, Screen Directors Playhouse, two episodes of Climax!, Tales of Wells Fargo, The Martha Raye Show, Playhouse 90, Westinghouse Desilu Playhouse, Johnny Ringo, two episodes of Bonanza, three episodes of Maverick (in which he portrayed assorted homicidal villains), and 77 Sunset Strip. Ebsen received wide television exposure when he played Georgie Russel, a role based on a historical person and companion to frontiersman Davy Crockett, in the Disneyland television miniseries Davy Crockett (1954-1955). In the 1958-1959 season, Ebsen co-starred in the 26-episode half-hour NBC television adventure series Northwest Passage. This series was a fictionalized account of Major Robert Rogers, a colonial American fighter for the British in the French and Indian War. Ebsen played the role of Sergeant Hunk Marriner; Keith Larsen played Rogers. In 1960, Ebsen appeared in episodes of the television series Rawhide, in the episodes "The Pitchwagon" and Tales of Wells Fargo, which he reprised in episodes of both series during 1962 in the roles of different characters. Also in 1960, Ebsen played in season 4 episode 30 of Have Gun, Will Travel called "El Paso Stage", as a corrupt marshal. From 1961 to 1962, Ebsen had a recurring role as Virge Blessing in the ABC drama series Bus Stop, the story of travelers passing through the bus station and diner in the fictitious town of Sunrise, Colorado. Robert Altman directed several episodes. Arthur O'Connell had played Virge Blessing in the earlier film version on which the series was loosely based. Ebsen also appeared as "Mr. Dave" Browne, a homeless hobo, on The Andy Griffith Show opposite Ron Howard, and as Jimbo Cobb in The Twilight Zone episode "The Prime Mover" (season 2, episode 21) in 1961.

Who was the director of Bus Stop ?

OUT:
Robert Altman directed several episodes.