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Steinmetz Decoded

Original Transient Electric Phenomena Figures

These are original scan-derived crops from Charles Proteus Steinmetz’s Theory and Calculation of Transient Electric Phenomena and Oscillations. They are promoted documentary assets with crop manifests and checksums in diagrams/original/theory-calculation-transient-electric-phenomena-oscillations/figures/.

This set is the first visual anchor for the transient side of the archive. It shows Steinmetz moving from a general transient term to condenser charge, critical damping, oscillatory charge, and decrement of oscillation.

Section titled “Promoted Crops”
Original scan crop of Steinmetz Fig. 4 starting of an alternating-current circuit having inductance
Fig. 4: Starting of an AC circuit

Printed page 21. Contrasts a gradual/logarithmic start with an oscillatory/trigonometric start.

Original scan crop of Steinmetz Fig. 11 logarithmic condenser charge
Fig. 11: Logarithmic condenser charge

Printed page 52. High resistance gives a non-oscillatory charge curve.

Original scan crop of Steinmetz Fig. 12 critical condenser charge
Fig. 12: Critical condenser charge

Printed page 58. The boundary case between logarithmic and oscillating behavior.

Original scan crop of Steinmetz Fig. 13 oscillating condenser charge
Fig. 13: Oscillating condenser charge

Printed page 61. Lower resistance lets current and condenser potential oscillate while decaying.

Original scan crop of Steinmetz Fig. 14 oscillating condenser charge with lower resistance
Fig. 14: Lower-resistance oscillating charge

Printed page 62. A stronger oscillatory case with successive half waves decreasing in amplitude.

Original scan crop of Steinmetz Fig. 15 decrement of oscillation
Fig. 15: Decrement of oscillation

Printed page 65. Plots decrement against resistance as a fraction of critical resistance.

Modern Redraw Sheet

Section titled “Modern Redraw Sheet”
Modern redraw sheet for Steinmetz condenser charge and decrement figures

This redraw sheet is a mathematical reading aid for Figs. 11-15. It separates the high-resistance logarithmic case, the critical boundary, the low-resistance oscillatory case, and the decrement curve. It should always be read beside the original crops above and the equation page, because the redraw clarifies the structure but does not replace the source.

Source-Grounded Reading

Section titled “Source-Grounded Reading”
FigureSource FunctionModern Reading
Fig. 4Shows transient current as either gradual or oscillatory.Introductory visual distinction between overdamped-like and underdamped-like response.
Figs. 11-12Show logarithmic and critical condenser charge cases.Non-oscillatory RLC transition behavior.
Figs. 13-14Show oscillating condenser charge with decaying current and potential waves.Underdamped RLC charge/discharge behavior.
Fig. 15Relates decrement to resistance ratio.Damping ratio/decrement view of oscillation decay.
Section titled “Related Pages”

Review State

Section titled “Review State”

These crops are source-derived and page-located, but they still need second-pass bibliographic review and crop-coordinate review before being marked canonical. A modern redraw sheet now exists as a reading aid, but it remains secondary to the scans.