1
Ballman Gray C: Battery charge programmers. Chargematic, March 28, 1972: US3652916 (6 worldwide citation)

The disclosure relates to Battery Charge Programmers which permit automatic charging of batteries by regulating the overcharge time of the battery being charged and which contain an overriding charge time limiter, to limit the total amount of time the battery is charged, independently of the state o ...


2
Ballman Gray C: Time responsive starting switches. Fenlon Joseph A, June 25, 1974: US3819994 (6 worldwide citation)

I have invented an instantaneously resettable starting switch for use in single phase electrical motors which switch provides a capacitor to develop a d-c charge upon the application of external power to the motor, and utilizes the charge of said copacitor to supply power to the start winding of sai ...


3
Ballman Gray C: Battery charger. May 15, 1973: US3733535 (5 worldwide citation)

This invention utilizes an SCR controlled charging circuit in which the on-off condition of the SCR is controlled by a transistor which conducts responsive to battery terminal voltage and which utilizes a capacitor between the gate lead of the SCR and the anode of the SCR to anticipate voltage fluct ...


4
Ballman Gray C: Time responsive starting switches. Fenlon Jr Joseph A, June 25, 1974: US3819995 (5 worldwide citation)

I have invented a resettable starting switch for use in single phase electrical motors which switch provides a capacitor to develop a d-c charge upon the application of external power to the motor, and utilizes the charge of said capacitor to supply power to the start winding of said motor for a fin ...


5
Ballman Gray C: Means and methods for ferro-resonant float charging circuits. December 25, 1973: US3781630 (4 worldwide citation)

The invention comprises a circuit in which a ferro-resonant transformer is used to control operation of a battery charger in which the voltage supplied to the charging circuit by a first secondary winding in the transformer is regulated by a second independent winding in said transformer so long as ...


6
Ballman Gray C: Battery chargers. Fenlon Joseph A, November 18, 1975: US3921051 (1 worldwide citation)

The disclosure relates to Battery Chargers which permit continuous application of AC power even during the use of the battery which function is accomplished by using SCR to control the negative return flow of charging current and by using three transistors in tandem, the first being operable only so ...