Probe for a gear tester

A feeler device comprising, in combination, an elongated probe element, a carrier for carrying said element, mounting means supporting said element on said carrier in a manner permitting relative movement between said probe element and said carrier, means for sensing said relative movement, said mounting means comprising a first spring means and a second spring means each extending parallel to the length of said probe element and acting on said probe in opposition to each other, a control member supported on said carrier and adjustable in either of two rotatable directions, a first connecting element and a second connecting element each extending parallel to the length of said probe element and disposed between said control member and said first and second spring means, respectively, whereby each of said first and second spring means is connected to said control member by a respective said connecting element, the adjustment of said control member on the carrier displacing said first and second connecting elements in opposite directions to each other in order to increase the biasing action of a selected one of said spring means on the probe element, said probe element being urged towards alternative end positions in dependence upon the adjustment of said control member and with a force that increases in dependence upon the extent of said adjustment of said control member from a central neutral position.