GB331764A - Means for re-winding clocks and like mechanism by the effect of variations in the temperature of the air - Google Patents

Abstract

331,764. Reutter, J. L. Nov. 28, 1928, [Convention date]. Winding-apparatus; motors operated by variations in atmospheric pressure and temperature.-A heat-insulated container A (e.g. Dewar tube) contains a liquid B of high specific heat.. A container C therein has a volatile liquid l with its saturated vapour v (e.g. ammonia or carbonic acid) which vapour acts through tube D on the inside of a sealed bellows E. Acting on the outside of these bellows is the saturated vapour of a volatile liquid (e.g. ammonia &c. as above) in a box F having a tube G closed by an elastic window H. The pressure of vapour in D remains substantially constant, that in F is subjected to the change in atmosphere. Movements of bellows E due to atmospheric changes are used to wind up a clock or like mechanism through levers I, I'. In a modification, Fig. 2, the bellows are replaced by a U-tube having the liquid and its vapour in each limb separated by mercury A. Movement of the mercury due to changes in the vapour pressures cause movement of the device about a pivot X, this movement being used to wind up the clock. In a further modification, Fig. 3, the U-tube is curved and carried in the heat insulated space between casings B, B<1>, the inner case containing a liquid of high specific heat. One limb of the tube c contacts with the inner vessel B (constant pressure) and the other limb contacts with the outer casing B<1> (variable pressure). Here also movement of the mercury causes movement about a pivot X.