Patent GB-190723144-A (GB)
Title: Method for Transforming Electric Energy of any desired kind into Direct Currents of any desired Tension.
Inventor: LOTZ ALBERT
Filed: 1907-10-19
Granted: 1908-10-19
Abstract: 23,144. Lotz, A. Oct. 20, 1906, [date applied for under Patents Act, 1901]. Converting alternating and direct currents; regulating.-The currents in electric apparatus connected to thermo-piles are regulated by automatic devices, by varying the currents in the heating-coils and by varying the number'of piles in operation. In the arrangement shown in Fig. 1, the armature a of a meter is connected to thermo-piles t, t1, t2, t3. The pile t is suspended by springs f, and has its lower end extending into a heating-coil e, the current in which is varied by a resistance w. An iron core, which may form one of the metals of the pile, is attached to the latter so that, as the current in the coil e varies, the position of the pile in the coil is altered. The piles t1, t2, t3 are arranged about a core suspended by pivoted levers and surrounded by a heating-coil e<1>. As the strength of the current in the coil e<1> varies, the position of the core k is altered to vary the heat given to the piles t1, t3. The piles t2, t3 are connected to the armature a through an auxiliary winding p. In the arrangement shown in Fig. 2, the thermo-piles t1, t2 are rigidly connected to a pivoted armature r of an electro-magnet e, the core of which transmits heat to the pile t1, while a resistance e<1> placed in series with the magnet coil supplies heat to the pile t2. When the potential across the mains varies, the position of the piles is varied with respect to the heating-coils. When an auxiliary coil his employed, the housing g protecting the heating-element e<2> and a pile t may be connected to the armature r. In ampere-hour meters, the current generated by the thermo-piles is only passed through a part of the armature winding. The Specification in the original form as published under the Act of 1901 comprises an arrangement in which the armature of an ampere-hour meter and a thermo-pile are connected up in shunt with a resistance in one main, the effect of the pile being regulated by varying the resistance in the heating- coil and by interposing a slide between the coil and the pile. In the arrangement shown in Fig. 2<a>, the shunt resistance heats the pile t<1> placed in series with the pile t and the meter armature a, the pile t being heated by an element e through a lens l and slide d. In another modification, shown in Fig. 3, an auxiliary winding h is connected up in series with the armatures a and in parallel with the thermo-piles t, the current in the thermo-pile circuit being varied by a resistance w and by varying the number of active piles. In another modification, the auxiliary coil h is connected to a pile, while two piles are connected in series with the armature a one of which may be swung out of action. In a further modification, the auxiliary coil h is heated by a potential coil, while a second thermo-pile is connected in parallel to the armature d, the heating of the pile being varied by a damper and diaphragm. This subjectmatter does not appear in the Complete Specification as accepted.