Improvements in and connected with speedometers. Francis Waldron Giveen, Herbert William Bamber, Oddur Vigfus Sigurdsson, September 27, 1928: GB297016-A

297,016. Giveen, F. W., Bamber, H. W., and Sigurdsson, O. V. Oct. 7, 1927. Fluid speed indicators.-In a speed indicator comprising an impelling fan and a driven fan, the fans are mounted concentrically in a chamber. The speed-indicating pointer spindle 10 is rigid with arms 9 carrying vanes 8 influe ...