US 2482522

Patent Overview: US 2,482,522 — "Voltage Regulating System"

Bibliographic data (per supplied source): Inventor Lester G. Tubbs; original assignee Westinghouse Electric Corporation; application Serial No. 667,755, filed May 7, 1946; granted and published September 20, 1949; anticipated expiration September 20, 1966; status listed as "Expired – Lifetime." Classification G05F3/06 (regulating AC voltage using combinations of saturated and unsaturated inductive devices, e.g., combined with a resonant circuit).

Purpose: The invention addresses static voltage regulators feeding inductive loads. Prior approaches used either a series capacitor to compensate regulator voltage drop from inductive load, or a tuned reactor-capacitor series network in the output circuit to correct frequency-induced error. The stated problem was that the size/cost of such compensating elements was uneconomical, and simultaneous compensation for both frequency error and inductive-load drop was not achievable. The stated object is a stabilizing network that economically compensates for both simultaneously.

Plain-language scope: A transformer (described as a small step-up autotransformer) has its primary winding connected in series between the static regulator and the load. A reactor and capacitor in series are supplied by the transformer's secondary. Because the reactor and capacitor are in series, their voltage drops oppose, so the transformer need only supply the difference between those drops, keeping it small. The capacitor is dimensioned so that at normal system frequency its reactance exceeds what is needed to cooperate with the reactor's inductive reactance for frequency compensation; the excess capacity reactance also compensates the regulator's inductive reactance caused by the inductive load. The network is said to suit low-voltage output circuits near 120 volts.

Claims: Claim 1 covers the transformer-plus-series-reactor-capacitor combination as described. Claim 2 recites an autotransformer with primary in series between regulator and load and the reactor-capacitor series combination across its secondary.

What the excerpt does not establish: It does not identify the specific commercial regulator or its manufacturer, provide component values, test data, or drawings details. It gives no litigation, ownership-transfer, validity, or prior-art analysis, and no information beyond the single figure and the text quoted above.

Source: https://patents.google.com/patent/US2482522/en