04077413 is referenced by 27 patents and cites 11 patents.

An improved automatic defibrillator operable from an internal rechargable battery power source or from an A.C. line when the battery is discharged utilizes a high efficiency flyback type power supply for charging the energy storage capacitor. The capacitor charging power supply employs an isolated output thereby allowing the defibrillator electrodes to be switched between the storage capacitor and an electrocardiogram unit by the discharge relay and avoiding the need for a separate relay or isolating impedance to isolate the preamplifier of the electrocardiogram unit from the defibrillator circuit. Finally automatic circuitry is employed to control the battery power supply so that the number of watt seconds (Joules) of energy delivered by the defibrillator may be easily selected by a single selector switch, and the charging of the capacitor terminated when the energy necessary to deliver the amount of energy selected has been stored.

Title
Defibrillator
Application Number
5/683016
Publication Number
4077413
Application Date
May 4, 1976
Publication Date
March 7, 1978
Inventor
Leslie W Partridge
Janesville
WI, US
Agent
Mason Kolehmainen Rathburn & Wyss
Assignee
The Burdick Corporation
WI, US
IPC
A61N 1/36
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