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Like all Janney couplers, the Tightlock is "semi-automatic". The couplers automatically lock when cars are pushed together, but workers must go between cars to hook up the air lines for the pneumatic brakes and connect cables for head-end power and other communications. To separate cars, a worker must use a lever to move the locking pin that ...
Roll-on, also known as a "Roller style trailer", uses rubber and/or polyurethane rollers for ease of launching and loading a boat. Glide-path, also known as a "Float-on style trailer", allows the boat to float onto the trailer; after the trailer has been partially submerged (usually 3 ⁄ 4 of the trailer). Since its inception, it has become ...
There are many variations in the design of quick couplers. The initial divergence is between those that can pick up any of a range of buckets and attachments by clamping onto the mounting pins for the attachment (known as "pin grabbers" or "pin couplers") and those that work only with buckets and attachments designed to suit that quick coupler (known as "dedicated").
The automatic semi-trailer coupling patented by Fruehauf dominated the semi-trailer market until the Fruehauf Trailer Corporation's assets were sold in bankruptcy to Wabash National in 1997. Another fifth wheel patent U.S. 2,053,812 [ 9 ] was issued to Charles E. Bradshaw of Wellville, Virginia , filed March 18, 1936 and granted September 8, 1936.
The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...
The lock company, Slaymaker, Barry and Company, was founded in 1888 by Samuel R. Slaymaker and John F. Barry of Connellsville, Pennsylvania.Samuel Slaymaker had become interested in switch and signal locks while working for the Pennsylvania Railroad as a civil engineer.
Reese James Llewellyn (30 August 1862 – 15 December 1936) was a Welsh-American businessman. He was the co-founder and president of Llewellyn Iron Works, a company based in Los Angeles, which provided iron works and steel for the construction of buildings in Southern California , the Western United States, Mexico, and South America.