|
Title: |
1896 Article-Card Electric Co., Electric Motor |
|
Source: |
Western Electrician, 07 Mar 1896 page 116 |
|
Insert Date: |
10/24/2011 4:33:41 PM |
|
Bending Rolls Operated by Card Electric Motor — The accompanying illustration shows a 30 horse power series reversible motor, controller and rheostat attached to bending rolls capable of bending iron plates 20 inches long by one-fourth of an inch or more in thickness. The electrical apparatus illustrated in connection with the bending rolls was manufactured by the Card Electric Company, Mansfield, Ohio. The motor is of 30 horse power capacity at a speed of 325 revolutions per minute under full load. It is geared directly to a shaft carrying a clutch which is operated by a vertical lever which engages in two trains of gearing, as desired, one for revolving the two lower rolls and the other for raising and lowering the upper one. As the motor is reversible, the manipulation of the rolls for bending plates on any circle is easily and quickly accomplished and with great accuracy. The rheostat is made up of iron wire in an improved form and has a capacity to carry the full current of the motor under all loads and at any speed. The resistance is sufficient to permit reversing the motor at full speed and under all conditions. The controller is particularly adapted and arranged for series wound motors where close regulation of speed, sudden stops and quick reversals of motor are required. All the working parts are made amply large on account of the severe work necessarily required of such apparatus. The circuit is opened at 24 contacts, breaking in unison, reducing the spark to practically nothing. Twenty-nine contacts are provided for regulating the speed. By means of this construction any desired speed can be had and maintained. The resistance is subdivided and the contacts so arranged for cutting portions of it in or out that arcing over and blistering the contacts is impossible. |
|
1896 Card Electric Co., Electric Motor Operating Bending Rolls
|
|