Patent GB-191022915-A (GB)
Title: Improvement in Apparatus for Indicating and Recording the Character of Smoke.
Inventor: EDDY RAY LAFOREST
IPC: G01N1/24
Filed: 1910-10-04
Granted: 1911-09-28
Abstract: 22,915. Eddy, R. L. Oct. 4. Turbidometers. - An apparatus for recording the quantity of smoke in gases of combustion comprises a reciprocating pump which intermittently draws from a chimney a quantity of smoke and fumes &c., draws them through a condenser and drier, and forces them in puffs from a nozzle adjacent to the face of a travelling cylindrical chart, the stains upon which form the desired record. Fig. 1 shows the general arrangement of the apparatus, wherein the smoke &c. is drawn from a flue A through a pipe B, and rises through a waterjacketed condenser 2. It passes thence to a vessel D containing sulphuric acid or other hygroscopic liquid, and thence through a pipe 10 to a valve chamber E, shown also in Fig. 2, at the head of a reciprocating pump J, H driven by worm-gearing 17 and a motor K. The pump which has a piston G<1> sealed by liquid in the vessel J, draws the smoke &c. into the chamber E and vessel J as the liquid sinks in the vessel J, and on its return stroke forces the smoke &c. from the nozzle F. The issuing smoke-laden gas impinges on a chart on a rotating and traversing cylinder O, Figs. 1 and 3, and thus forms a record of the density of the smoke in the stack. The jets of smoke &c. are controlled preferably by a disk valve M and needle valve 34 in the valve chamber E and nozzle F. The valve M, in the position shown, leaves open the passage 11, 12 between the pipe and the vessel J, and when retracted closes the port 11 and leaves open the passage between the vessel J and the nozzle F. The valve spindle 25 is operated by an oscillating lever 27, which is pivoted at 28 and is operated by a cam 30 on the spindle 18 of the worm-wheel. The valve-spindle 25 is moved by means of spring-mounted pieces 32. The motor K is connected to the worm 16 by a flexible shaft or shaft-coupling consisting of a spacing- piece L with conical ends fitting the countersunk ends of the shafts 15, 16, which are connected by a coiled spring L'. The worm-gearing is lubricated by an idle wheel 24 rotating in an oil-bath 23 in the base block 22. The jets of smoke are prevented from spreading by a shield P, Fig. 5, which is mounted on the nozzle F and has an horizontal slot P bounded by lips P<2>. The recording-cylinder O, Fig. 3, is carried by a screwed shaft 41, which is driven by a clockwork mechanism shown in Figs. 8 and 9. This comprises two plates 44, 44<a>, bolted together and forming the bearings of a hub or sleeve 43 rotated by the clock-work. This sleeve is connected to the shaft 41 by a feather, and thus rotates it and lifts it in a nut 42, which rests on the top plate 44 and is prevented from rotating by pins 42<a> entering holes 44<c>. The cylinder 0 may be set by means of the set-screw 48 or by lifting the nut 42 and running it along the shaft 41. The chart is secured by slipping its free ends into a longitudinal split in the circumference of the cylinder, the edges of the split being opened and closed by a right and left handed screw 51. Reference has been directed by the Comptroller to Specification 12,726/04, [Class 51, Furnaces &c.].