Datamp.org Patents http://www.datamp.org/ Recently added patents en-us US Patent: 144,731 http://www.datamp.org/patents/displayPatent.php?id=44720&pn=144,731 Mechanisms for Reversing Engines Patentee: George W. Bishop - Brooklyn NY Granted:1873-11-18

From a descendant of the inventor, Carol Bishop Fisher: His last patent was for the Mechanisms for Reversing Engines (# 144,731 - Nov. 18, 1873) was possibly his least known, in his attempt to join the masses of inventors trying to solve the problem of the reverse mechanism for the steam engine. My ancestor's ingenious invention simplified the reversing mechanism by using rotary valve-blocks in place of the usual assortment of complex levers and link-motions which were then in use with less satisfactory results. Previous attempts to introduce sliding valves were unsuccessful because of the friction created by the steam pressure on the sliding block or plate, but this rotary valve eliminated this problem. To this day it is the opinion of mechanical engineers that the steam engine reversing mechanism has never been perfected. G. W. Bishop became ill and escaped notice in mainstream technical literature of reversing gears. Had the George W. Bishop mechanism been tested, it may have proven to solve not only the problems of complexity and unreliability, but also the theoretical errors of port opening and timing introduced by lever and link-motion reversing mechanisms.
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US Patent: 1,516X http://www.datamp.org/patents/displayPatent.php?id=37379&pn=1,516X Firearms Patentees: William Thornton - Portland ME , John H. Hall - Washington DC Granted:1811-05-21
Manufactured by Hall's Rifle Works - Harpers Ferry VA

Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. This is one of the recovered patents. This patent is in the database for reference only.
This is one of 55,353 patents currently in the database at datamp.org

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US Patent: 1,515X http://www.datamp.org/patents/displayPatent.php?id=37378&pn=1,515X Firearms Patentees: William Thornton - Portland ME , John H. Hall - Washington DC Granted:1811-05-21
Manufactured by Hall's Rifle Works - Harpers Ferry VA

Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. This is one of the recovered patents. This patent is in the database for reference only.
This is one of 55,353 patents currently in the database at datamp.org

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US Patent: 314,723 http://www.datamp.org/patents/displayPatent.php?id=55549&pn=314,723 Ice Pick Patentee: Ethan Rogers - Cohoes, Albany County NY Granted:1885-03-31


This is one of 55,353 patents currently in the database at datamp.org

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US Patent: 975,694 http://www.datamp.org/patents/displayPatent.php?id=22744&pn=975,694 Automobile Tool Patentee: Frank Knight - New Haven CT Granted:1910-11-15
Manufactured by Crescent Tool Co. - Jamestown NY

The pliers has a distinctive handle with a cotter key puller and two box wrench openings. The other handle ends in a screwdriver.
This is one of 55,353 patents currently in the database at datamp.org

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