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Bill Cardwell 1917-2012

William T. “Bill” Cardwell was born on May 27, 1917 and obtained his Bachelor/Masters Degree in Chemical Engineering from California Institute of Technology in 1939. He was employed by Standard/Chevron Oil Company as a chemical engineer, research scientist and patent advisor until his retirement in 1981. In addition to his many patents related to oil drilling, he patented the invention of a “Double Bipolar Photosculpture Machine.” This machine allows you to carve (out of wood) a 3 dimensional version of a persons’ head from a 2 dimensional photograph which was way ahead of its time back in 1965! Bill was an active and enthusiastic trumpet player, and played in concert bands, dance bands and dixieland groups in a number of venues.

Bill Cardwell with his Salpingometer

Bill Cardwell with his Salpingometer

Cardwell "F" Trumpet

Cardwell “F” Trumpet

Bill began serious acoustic studies of the trumpet in 1959, and he intensified his efforts in 1965 following a detached retina which forced him to give up playing the trumpet. His objective was to make trumpets that played and responded better in the upper register and that were better in tune. His first significant contribution to the art was to calculate the required bell stem parameters to match a particular mouthpiece and leadpipe in order to properly tune the lower modes of the instrument to align with the upper modes.

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Cardwell “F” Trumpet

By 1966, he had designed his high sopranino F trum