Abstract: An interferometer pressure sensor includes a reflective film configured to change a position thereof responsive to a pressure change and an interferometer element configured to detect the position change of the reflective film. A holder is configured to hold the reflective film and the interferometer element. The holder includes a first member formed of a first material having a first coefficient of thermal expansion and a second member formed of a second material having a second coefficient of thermal expansion that is different from the first coefficient of thermal expansion. The first member and the second member of the holder are sized and configured based on the first coefficient of thermal expansion and the second coefficient of thermal expansion so that a distance between the reflective film and the interferometer element is substantially constant over a temperature range.

Abstract: A small transmission which is used with riding lawn mowers, snowmobiles, etc. has a brake combined therewith in one unit. Manufacturers of lawn mowers, etc. can buy the transmission and brake in one package and save considerably in assembly costs. The new brake is easier to operate than those heretofore known, involving less friction, and is subjected to less wear. The new brake also has a stationary jaw or puck holder which enables it to be made less expensively, and other components of the brake are also less expensive to produce.