Fetal heart detector
AssigneeOxford Medical Limited
InventorBarnaby Wilmott
Life of this patent
Estimating the term…
Abstract
A self contained hand held fetal detector comprises an ultrasonic receiver and transmitter (23). Selectively actuable ultrasonic receiving and transmitting circuits (25,21) are connected to the ultrasonic receiver and transmitter (23) with a controller (24) for actuating either the ultrasonic receiving circuit (25) or the ultrasonic transmitting circuit and a loudspeaker (29) connected to the ultrasonic receiving circuit (25) for generating an audio output signal. The detector comprises a single unit (13) and the controller (24) modifies at least one of the transmitted and received signals, to prevent interference in the received ultrasound.
Claims5
A self contained, hand held, single unit fetal detector, the detector comprising ultrasonic receiving and transmitting means;
- a selectively actuable ultrasonic receiving circuit and a selectively actuable ultrasonic transmitting circuit, wherein each circuit is connected to the ultrasonic receiving and transmitting means;
- control means for actuating either the ultrasonic receiving circuit or the ultrasonic transmitting circuit;
- and a loudspeaker connected to said ultrasonic receiving circuit for generating an audio output signal, wherein the control means causes the ultrasonic transmitting circuit to transmit pulses of ultrasound and causes the ultrasonic receiving circuit only to pass signals to the loudspeaker between said transmission of pulses of ultrasound and after a predetermined period following termination of said transmission of a pulse.
Dependencies are inferred from the claim text.