nsMar. 25, 1862.
34,906SingerApr. 8, 1862.
36,084HallAug. 5, 1862.
(Reissue.)1,388Atkins et al.Jan. 20, 1863.
37,913HoweMar. 17, 1863.
37,985SmithMar. 24, 1863.
38,740HalliganJune 2, 1863.
39,256LangdonJuly 14, 1863.
41,916GuinnessMar. 15, 1864.
43,927PlanerAug. 23, 1864.
44,063AtwaterSept. 6, 1864.
44,382MeloneSept. 20, 1864.
45,278StackpoleNov. 29, 1864.
45,972CadwellJan. 24, 1865.
(Reissue.)1,930Atkins et al.Apr. 11, 1865.
47,673WinsleyMay 9, 1865.
49,262HalliganAug. 27, 1855.
class E. — button-hole.
1. One Thread.
No.Name.Date.
24,863Goodes et al.July 26, 1859.
31,628RoseMar. 5, 1861.
32,023BurrApr. 9, 1861.
33,029CaseAug. 13, 1861.
(Reissue.)1,616Goodes et al.Feb. 9, 1864.
41,923JacksonMar. 15, 1864.
50,989EmersonNov. 14, 1864.
79,393ReynoldsJune 30, 1868.
110,739CleminshawJan. 3, 1871.
111,059HelwigJan. 17, 1871.
128,363CleminshawJune 25, 1872.
139,745TobeyJune 10, 1873.
139,770CleminshawJune 10, 1873
2. Two Thread.
10,609Mille
tent, No. 92,078, June 29, 1869); Elliott's tachometer, July 28, 1874.
See also Fig. 1568, page 661. The principle is similar to the Lind anemometer, Fig. 205, page 99; the latter measures the speed, or force rather, of a current of air.
b. The rotary-pump principle.
Walker, No. 68,265, of 1867.
c. The log. A chip on the end of the log-line or train of wheels to register revolutions and consequent length of line out. Hotchkiss, No. 45,042, November 15, 1864; Lozier, No. 41,932, March 15, 1864; Barnare, No. 93,513, August 10, 1869.
See log.
d. Vanes actuated by current.
St. John, No. 8,085, May 13, 1851; Pierce, No. 128,324, June 25, 1872.
e. A flap-valve opening against the current, and oscillated on its axis with a force proportionate to the speed of the vessel, actuating a rod and a pointer on a dial.
Walker, No. 14,328, February 26, 1856; Hinman and Tournier, No. 17,349, May 19, 1857; Thompson, No. 14,035, January 1, 1856.
A velocimeter, Vitruvius says (50 B.