A magnetostrictive pressure transducer is disclosed wherein pressure in the range of zero to 1000 psi can be accurately measured. The pressure transducer apparatus includes a diaphragm causing the pressure to be applied unidirectionally on sensor material having the property of undergoing changes in magnetic induction when a pressure is applied thereto, the change in magnetic induction being related to the applied pressure. The change in magnetic induction is measured and thus provides a measure...

An electromechanical transducer is provided which employs a piezoresistive substrate support body of semiconductive material of which a first type N or P and a lineal resistor composed of material of a second type (P or N) formed on one surface thereof. The support body has a reduced neck intermediate two pads. The lineal resistor extends between the pads and across the neck on one side of the support body. The lineal resistor is formed by diffusing semiconductive material of the second type of ...

A transducer to monitor velocity and direction of movement having a magnetic core with at least three spaced apart poles. Two of the poles include coils which are wired series aiding for connection to an input alternating voltage, which upon current flow create a magnetic field intersecting the path of movement of an object being monitored. The third pole includes a coil in which an alternating output voltage is induced when the monitored object moves. The magnitude of such output voltage varies...

An electroacoustical transducer is disclosed which incorporates an array of eversible electroacoustical energy converters. Disposed between opposite ends of adjacent ones of said converters is one or more balsa wood struts or wafers which effect predetermined lateral mechanical decoupling therebetween whenever they are energized either by electrical or acoustical energy.

A high energy level acoustic transducer employs a reentrant tail mass strure. Dimensions and placement of the reentrant portion of the tail piece eliminate lateral or rocking vibration modes of the transducer in the operative bandpass.

Stops are provided to limit the displacement of a moving member of a transducer to microscopic distances of less than about 100 microinches and to an accuracy of .+-. 15 microinches or better in order to protect delicate strain sensitive elements against breakage. The gap is formed by bringing hard elements into contact with soft, work hardenable, elements of the assembled unit and then impacting the hard and soft elements together to form the microscopic gaps by virtue of yielding of the soft e...

In combination, a water bed frame with side boards, a water filled flotation mattress within the frame, an electromagnetic vibrating transducer unit between a side board and the mattress and operable to generate and transmit motion into the mattress and an adjustable power supply connected with a 60 Hz. domestic power service and delivering current at a fixed frequency and at sub-harmonic frequencies of said fixed frequency to the unit; said unit includes an elongate resilient armature with fron...

A transducer for establishing an output voltage proportional to an input fluid pressure supplied thereto. The transducer has a resistor with a voltage selector movable in electrical contacting engagement therewith to establish the output voltage. A piston actuates the voltage selector to its electrical contacting engagement with the resistor to establish the output voltage in response to the input fluid pressure acting on a diaphragm arranged in driving engagement with the piston.

An electro-mechanical transducer is disclosed in which a piston-like radiating element is driven by fluid pumped from the interior of a flextensional transducer such that the motion of the flextensional transducer shell is transmitted to the radiating element.

Transducer for converting mechanical stress into electric signals, which transducer is composed of at least one electromechanical sheet (107,108) and is capable of converting mechanical stress into electric signals and in which transducer at least one of the electrodes required by the electromechanical sheet is disposed on the surface of one or more thin and flexible dielectric materials, said electrodes (109) forming electrically conductive surfaces of the transducer for connecting the transduc...