In 1869, Andrew Smith Hallidie had the idea for a cable car system in San Francisco, reportedly after witnessing an accident in which a streetcar drawn by horses over wet cobblestones slid backwards, killing the horses. Hallidie solicited financial support in 1871 and 1872, and his primary backers were Henry L. Davis, Joseph Britton, and James Moffit.
The first successful cable-operated street running train was the Clay Street Hill Railroad, which had its inaugural run on August 2, 1873. The promoter of the line was Hallidie, and the engineer was William Eppelsheimer; both Hallidie and Eppelsheimer obtained several patents for their work on the Clay Street line. The line involved the use of grip cars, which carried the grip that engaged with the cable, towing trailer cars; the design was the first to use grips. The term “grip” became synonymous with the operator.
The line started regular service on September 1, 1873, and its success led it to become the template for other cable car transit systems. It was a financial success, and Hallidie’s patents were enforced on other cable car promoters, making him wealthy.
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