Lethal electric fence energizer
AssigneeZareba Security, Inc.
InventorKirk Wolfgram
Life of this patent
Estimating the term…
Abstract
Electric fence energizers used with fencing systems are provided. The energizers can be used to provide an unsafe electric shock, as defined by safety agencies such as UL, where the electric fence energizers are capable of operating continuously regardless of the fence load. Alternately, the energizers can be equipped so as to be selectively set in one of a plurality of modes of operation, for example, “unsafe mode”, “lethal mode”, and “safe mode”.
Claims41
An electric fence energizer for use with an alternating current power source for continuously applying electrical energy pulses including at least lethal pulses to a fence without failing due to resistive loads contacting the fence comprising:
- a step-up transformer having a primary winding and a secondary winding, the secondary winding being adapted for connection to the fence;
- a storage capacitor sharing a connection with both the primary winding of the transformer and an input being adapted for connection to the power source;
- a switch connected to the primary winding of the transformer, the switch being operative to supply voltage stored in the storage capacitor across the primary winding when the switch is closed;
- and
- a timing circuit adapted to periodically trigger the switch so as to provide alternating on-periods and off-periods for the lethal pulses being delivered from the step-up transformer to the fence.
An electric fence energizer for use with an alternating current power source for continuously applying electrical energy pulses including at least lethal pulses to a fence without failing due to resistive loads contacting the fence comprising:
- a step-up transformer having a primary winding and a secondary winding, the secondary winding being adapted for connection to the fence;
- a switch connected between the primary winding of the transformer and an input being adapted for connection to the power source, the switch being operative to supply voltage from the power source across the primary winding when the switch is closed;
- and
- a timing circuit adapted to periodically trigger the switch so as to provide alternating on-periods and off-periods for the lethal pulses being delivered from the step-up transformer to the fence.
An electric fence energizer for use with an alternating current power source for continuously applying electrical energy pulses including at least lethal pulses to a fence without failing due to resistive loads contacting the fence comprising:
- a step-up transformer having a primary winding and a secondary winding, the secondary winding being adapted for connection to the fence;
- and
- a current limiting means to prevent the step-up transformer from overheating when the lethal pulses are delivered to the fence.
An electric fence energizer for use with an alternating current power source which is switchable between operating modes and, when used for applying lethal electrical energy pulses to a fence, is adapted to continuously operate without failing due to resistive loads contacting the fence comprising:
- a step-up transformer having a primary winding and a secondary winding, the secondary winding being adapted for connection to the fence;
- a switch connected to the primary winding of the transformer, the switch being operative to supply voltage across the primary winding when the switch is closed;
- a timing circuit adapted to periodically trigger the switch so as to provide alternating on-periods and off-periods for the lethal pulses being delivered from the step-up transformer to the fence;
- and
- one or more secondary switches, where one of the secondary switches is positioned between one or more of the power source and the primary winding and a controller within the timing circuit and the primary winding so as to vary one or more of the off-periods, the on-periods, and current of the pulses in order for the fence energizer to operate in one of a plurality of modes.
Dependencies are inferred from the claim text.