ACTUATOR CONCEPTS FROM 1873 AND 1886 Mr. Terence F. Reilley patented the actuator concept presented in the photograph in 1873. Mr. Titus Powers's patent of 1886 employed the same basic concept. Unaware of the earlier inventions, I developed the same actuator between 1971 and 1999, but was informed in 2002, by the US patent office, that I was only late by 127 years, as they referenced Mr. Reilley's and Mr. Power's patents. ACTUATOR CONCEPT FROM 1901 Mr. Frank H. Sleeper patented the actuator concept in the photograph below in 1901. I developed the actuator in the photograph below between 1971 and 1999. I used linear motion bearings and rails where Mr. Sleeper used a different mechanism allowing for the lengthening of the walls on the forward drive. In 2002 the US patent office made me first aware of Mr. Sleeper's patent. I was a little more up to date with this one, only ninety-seven years too late. 13.249
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