Wearable electric field detector
AssigneeHD Electric Company
InventorWilliam J. McNulty
Life of this patent
Estimating the term…
Abstract
A wearable electric field detector has a housing mountable on a user's person and including a sensing circuit responsive to an electric field to generate a signal which varies in proportion to the strength of the sensed field, and an alarm circuit coupled to the sensing circuit for producing an intermittent audible alarm signal, which has a repetition rate varying in proportion to the strength of the field, and a visible alarm signal. A mute circuit is manually activatable for selectively muting the audible alarm and then automatically reenabling it after a predetermined time period. The detector includes a manually-actuatable test circuit. There is no on-off switch, the detector being disabled by being disposed in a shielded carrying case.
Claims15
A wearable electric field detector comprising:
- a housing adapted to be mounted on a user's person,
- a sensing circuit disposed in the housing and responsive to an electric field for generating a sense signal which varies in proportion to the strength of the sensed field,
- an alarm circuit coupled to the sensing circuit for producing an indication of the sensed field;
- said alarm circuit including an audio annunciator for producing an audible alarm signal in response to the sense signal;
- and
- a normally disabled mute circuit coupled to the alarm circuit and enabled only when the alarm circuit is producing an indication of a sensed field, the mute circuit being selectively operable only when enabled for deactivating the audio annunciator without affecting the sensing circuit.
In combination:
- a wearable electric field detector,
- said detector including a housing adapted to be mounted on a user's person,
- a sensing circuit disposed in the housing and responsive to an electric field for generating a sense signal which varies in proportion to the strength of the sensed field, and
- an alarm circuit coupled to the sensing circuit for producing an indication of the sensed field;
- and
- a carrying case adapted to receive the housing and including shield material for shielding the sensing circuit from electric fields when the detector is disposed in the carrying case.
Dependencies are inferred from the claim text.