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All Patents of Type: rpm speed gauges and tachometers
Patents 1 - 12 of 12
First set of recordsLast set of records
NumberDatePatenteeTitleType
XC-6Oct. 31, 1826C. LaurierMachine or instrument called 'Loch Terrestre,' for accurately ascertaining the number of rotatory motions or revolutions of carriage-wheels, millstones, &c.rpm speed gauges and tachometers
139,184May 20, 1873J.W. OsborneSpeed Gagerpm speed gauges and tachometers
182,177Sep. 12, 1876E. Wright, D. Davis, Jr.Rotary Measurerpm speed gauges and tachometers
454,391Jun. 16, 1891E. VerstraeteSpeed Recorder and Registerrpm speed gauges and tachometers
680,988Aug. 20, 1901S.B. StorerMagnetic Speed Indicatorrpm speed gauges and tachometers
705,514Jul. 22, 1902H.S. CredlebaughSpeed Gagerpm speed gauges and tachometers
759,512May 10, 1904H. FrahmMethod of Measuring the Revolutions of Rotating Shaftsrpm speed gauges and tachometers
857,979Jun. 25, 1907W.L. BryantTachometerrpm speed gauges and tachometers
868,055Oct. 15, 1907F.L. WolfeRecording Counterrpm speed gauges and tachometers
871,849Nov. 26, 1907F.L. WolfeRecording Counterrpm speed gauges and tachometers
873,754Dec. 17, 1907P.L. JohnsonRegistering Counterrpm speed gauges and tachometers
1,437,353Nov. 28, 1922J.W. ParkerRevolution counterrpm speed gauges and tachometers
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