Coal gasification apparatus

Coal gasification apparatus having a hydrogenation gasifier chamber for gasifying a portion of coal charge and a steam gasifier vessel for gasifying unconverted coal from the hydrogenation chamber with the chamber disposed above the vess...

K Kunstle，C Koch，K Reiter - US

Balanced armature transducer with transverse gap

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Tibbetts，George，C. - 《Journal of the Acoustical Society of America》

Micromachined magnetically balanced membrane actuator

The present invention relates to an miniature actuator especially suitable for hearing aid applications. The actuator according to the present invention op...

P Rombach，J Rehder - US

Electroacoustic transducer

An electroacoustic transducer converts an electric signal into sound by vibrating a diaphragm magnetically in response to the electric signal input thereto. A movement restricting means for restricting the movement of the diaphragm withi...

Y Imahori，I Fushimi，K Nito - US

Electro-mechanical transducer which couples positive acoustic feedback into an electric amplified guitar body for the purpose of sustaining played notes

A transducer for a musical instrument through which vibrations can be fed back to the instrument so that notes played on the instrument can be sustained. ...

AA Hoover，GT Osborne - 《Journal of the Acoustical Society of America》

Micromachined magnetically balanced membrane actuator

The present invention relates to an miniature actuator especially suitable for hearing aid applications. The actuator according to the present invention operates according to the change in reluctance principle. In particular, the actuato...

P Rombach，Jrg Rehder - US

Electroacoustic transducer with improved shock resistance

A transducer which is particularly suitable for hearing aids is set forth which has improved resistance to mechanical shock. The transducer includes a coil having a tunnel, a magnetic member with a pair of magnets defining an air gap and...

O Geschiere，H Dolleman，HG Obbink，... - 《Ultrasonics》

Armature for a receiver

An armature for a receiver comprising a first and a second leg portion each having a thickness and a width and connected to each other, and a connection portion in communication with the first and second leg portions. The connection port...

Thomas Edward Miller - WO

Armature for a receiver

An armature for a receiver includes a first leg portion, a second leg portion, and a connection portion in communication with the first and second leg port...

TE Miller

Armature for a receiver

An armature for a receiver includes a first leg portion, a second leg portion, and a connection portion in communication with the first and second leg port...