Patent GB-190809293-A (GB)
Title: Improvements in or relating to Alcoholmeters and the like
Inventor: DESQ PAUL
Filed: 1908-04-29
Granted: 1909-04-29
Abstract: 9293. Desq, P. April 29. Alcoholmeters; specific gravity estimating-apparatus ; thermometers.- The apparatus indicates on the same dial the temperature of the distilled liquid and the percentage of alcohol, benzol, &c. in it; and also records the corrected volume of liquid pasing through and the amount of pure alcohol &c. it represents. The alcoholic liquid enters the apparatus at 17, and, rising up through the passage 16, imparts its temperature to a silver wire 13 wound several times round a series of levers 14 and attached at its fiee end to a sector 19, the movement of which as the wire contracts or expands is caused to give an indication of the temperature and also to adjust the volumes of the measuring- chambers 27 into which the liquid next passes. This adjustment is effected by the rise or fall of weights 23, Fig. 5, in the mouths of communicating tubes 25, and is for the purpose of ensuring that the chambers (of which there are two, used alternately) shall hold exactly a litre at standard temperature. The liquid rising in one of the chambers slowly raises a float 41 and an attached cross-head 44; when practically at the top of its path, projections 107, Fig. 9, on this cross-head contact with projections 108 on a weighted arm 39 and tilt the arm over, causing the pivoted arm 38 to turn suddenly. This raises the spindle 35 in the filled chamber and depresses that in the empty one. The spindle, being connected to the sliding sleeve 33 and valve 36, raises both in the filled chamber, so that the sleeve abuts against the top of the passage 32, and the valve lifts to allow the liquid to pass through a passage 47, and sieve 48 into a balance cup 70, which receives it in its upper position, shown dotted. This cup is balanced by three ivory floats 55, moving in mercury and connected by their spindles 56 to a spider on top of the balance chamber. The cup is in balance when it contains a litre of pure alcohol &c., but as the distillate would be heavier, it descends, the liquid running from the upper of the two. compartments into which the cup is divided into the bottom one through suitable openings. The bottom compartment being filled, the liquid runs out through a central passage 74 ; when the weight is thus sufficiently reduced, the cup commences to rise, actuating a pointer to give an indication of the percentage of alcohol by means of a rack 62 engaging a pinion- 63 on the spindle 64. The cup rises still emptying till the central rod 60 contacts with a lever 78, against which it presses so that the valve 75 is opened against the force of the spring 76 to discharge the whole of the contents ; the lever is next swung across out of the way by the tilting of the arm 39, the cup then being allowed to rise to its highest position, to be filled from the other measuring-chamber. As each chamber is filled, the corresponding cross-head 44, by means of an eccentric 45, tilts a lever 46, Fig. 5, which acts through a second lever 114; rod 84, pawl and ratchet. as shown, and worm-and-wheel gear 88, 89 to move the index of the liquid volume dial through one division and to give a similar movement to the index which indicates the amount of pure alcohol passing through. The pure alcohol indicator does not remain at this point, but is returned to the correct reading by the rise of the cup acting through the rack 62, pinion 63, &c. on a cam 67, Fig. 5, which engages a roller 101, Fig. 8, on a rack 100, and by raising this rack rotates the spindle 91 of the differential device shown in Figs. 5 and 8. This device comprises essentially, a double pulley 90 having triangular grooves engaging with triangular pieces 92, 93, each having one end free while the other engages a wheel 94 or 95 mounted loosely on the pulley spindle. The only rotation transmitted is that tending to close the open angles of the triangles. The ratchet-wheel 86 drives the device through gearing 97, 98, 96, and the rack 100 acts on a pinion integral with the wheel 95. If the apparatus is stopped, there is an overflow into a chamber 111, Fig. 3, and 'thence into a chamber 4 in which a float 5 rises to give an alarm by closing a circuit &c. The apparatus can be used for alcohols, benzols, gasolines, and petrols and for liquids generally, and may be used as a meter in selling or as a meter for-putting spirits &c. into casks.