Following Prof. Henry came Sturgeon’s rotary motor of 1832, Jacobi’s rotary motor of 1834, [Fig. 29], which had electro-magnets both in the field and armature; Davenport’s motor of 1834, Zabriskie’s motor of 1837, in which a vibrating magnet converted reciprocating into rotary motion; Davenport’s motor of 1837 (U. S. Pat. No. 132, Feb. 25, 1837), [Fig. 30]; Page’s rotary motor of 1838, Walkley’s motor of 1838 (U. S. Pat. No. 809, June 27, 1838); Stimson’s motor of 1838 (U. S. Pat. No. 910, Sept. 12, 1838); Page’s motor of 1839, Cook’s of 1840 (U. S. Pat. No. 1,735, Aug. 25, 1840); Elias’ motor of 1842, invented in Holland; Lillie’s motor of 1850 (U S. Pat. No. 7,287, April 16, 1850); the Neff motor of 1851 (U. S. Pat. No. 7,889, Jan. 7, 1851), of which illustration is given in [Fig. 31], and Page’s motor of 1854 (U. S. Pat. No. 10,480, Jan. 31, 1854). In 1835 Davenport constructed a small circular railway at Springfield, Mass.
FIG. 29.—JACOBI’S ROTARY ELECTRIC MOTOR.
In 1839 Prof. Jacobi, with the aid of Emperor Nicholas, applied his electric motor to a boat 28 feet long, carrying fourteen passengers, and propelled the same at a speed of three miles an hour. About the same time Robert Davidson, a Scotchman, experimented with an electric railway car sixteen feet long, weighing six tons, and attaining a speed of four miles an hour. In 1840 Davenport, by means of his electric motor, printed a news sheet called the Electro Magnet and Mechanics’ Intelligencer. In 1851 an electric locomotive made by Dr. Page in accordance with his subsequent patent of 1854, drew a train of cars from Washington to Bladensburg at a rate of nineteen miles an hour.
FIG. 30.—DAVENPORT MOTOR.
