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  ABDNP201970a02.jpg - Taylor, Taylor & Hobson: Talyvel 1  The Talyvel was the world's first commercial electronic tiltmeter, superseding much less sensitive instruments based on the 'spirit level'.  Our example dates from around 1960. The instrument consists of two units, namely the level sensor itself and a transistorized signal detector and amplifier that feeds an output to a centre-zero meter.  There are 3, switched, sensitivity ranges, the most sensitive of which clearly shows angular changes of 1 arc second with a full-scale deflection of ±50 seconds of arc.  The sensor is stored in the back of the meter case and is taken out for use.  The Talyvel sensor unit contains a damped pendulum suspended between two plates.  When the sensor is tilted, the distances between the pendulum and the plates are different and the electronic circuitry produces a voltage that is fed to the meter. The Taly range of instruments have been world leading products in mechanical ultra-precision measurement for over a half a century.  Our collection also includes examples of their linear and surface measuring instruments.  An overview of this range by John S. Reid and Michael A. Player is due to appear in the next issue of the Bulletin of the Scientific Instrument Society. ABDNP:201970a  
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18 | Taylor, Taylor & Hobson: Talyvel 1

The Talyvel was the world's first commercial electronic tiltmeter, superseding much less sensitive instruments based on the 'spirit level'. Our example dates from around 1960. The instrument consists of two units, namely the level sensor itself and a transistorized signal detector and amplifier that feeds an output to a centre-zero meter. There are 3, switched, sensitivity ranges, the most sensitive of which clearly shows angular changes of 1 arc second with a full-scale deflection of ±50 seconds of arc. The sensor is stored in the back of the meter case and is taken out for use.

The Talyvel sensor unit contains a damped pendulum suspended between two plates. When the sensor is tilted, the distances between the pendulum and the plates are different and the electronic circuitry produces a voltage that is fed to the meter.

The Taly range of instruments have been world leading products in mechanical ultra-precision measurement for over a half a century. Our collection also includes examples of their linear and surface measuring instruments. An overview of this range by John S. Reid and Michael A. Player is due to appear in the next issue of the Bulletin of the Scientific Instrument Society.

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