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US Patent: 36,621
Improved centrifugal governor
Patentee:
Thomas R. Pickering - New York, NY

USPTO Classifications:
73/546

Tool Categories:
propulsion and energy : steam engines : steam engine governors

Assignees:
None

Manufacturer:
Pickering Governor Co. - Portland, CT

Witnesses:
James Laird
Edward W. Hodgson

Patent Dates:
Granted: Oct. 07, 1862

Patent Pictures:
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"Vintage Machinery" entry for Pickering Governor Co.
Description:
Earlier governors used balls being rotated by the engine; gravity pulled the balls down and great rotational speed lifted the balls up. Pickering was dissatisfied with the accuracy of this mechanism and his innovation was to replace the action of gravity with that of leaf springs that pull the balls inward. The Pickering governor was a rousing success.

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