DE57577C - Device for the automatic measurement of liquids - Google Patents

Description

IMPERIAL

PATENT OFFICE.

CLASS 42: Instruments.

In Fig. I, 2 and 3 this apparatus is in general view with section, Grundrifs and different view of the parts, in Fig. 4, 5 and 6 in the same arrangement a modification the same for measuring very small amounts of liquids.

On the foot A is the stand B, on which the arms CC , which end in the caps DD ^{1, can be moved} . The latter are used to hold the cylinder E between them, which is provided with the locks .Fund F ' at the bottom and top. The perforation of D 'F' is used to establish a connection between the otherwise closed space in E and the atmosphere. In the lower end of the valve α and waste pipe b provided with the measure G, the lifter H is slidable and the pipe K is tightly inserted. The hoses H ' and K' are plugged onto the siphon tube H and tube K outside E and open onto the nozzle L ' and L "of the tube L , which is in the neck of the filling bottle M ; the neck c is used to refill the latter ', into which a pipe is introduced from the barrel, basin or the like. In the neck c ″ of the filling bottle M the pipe N opens, which is connected to a balloon P or to another device that generates compressed air as a pump, bellows, etc. is. The vessel Q. placed under the waste pipe b is completely arbitrary.

The handling and effect are as follows: The filling bottle M is filled with the liquid in question, which is to be quickly and safely divided in certain dimensions, and the siphon // "is first pushed so high that its tip no longer reaches into the dimension G. Now if one presses at P, which has the result that the liquid enters the pipe L and from here through L ' and L " and dog K into the space E or. enters directly into the G measure. But through H , as a result of its running out into a point, at most only a few drops flow out, and the rest goes back, so that air-thinned space is formed in it, whereby the condition for the effectiveness of this pipe as a siphon is automatically fulfilled; by contrast, the entry of the liquid is unhindered by K , and it is effected by pressing until it has risen over the opening of measure G and has filled it; Of course, the valve α must be closed here. The excess then runs back by itself through KK 'L "L to M. However, this is not sufficient for precise measurement, since a convex meniscus has formed on G which, destroyed by the slightest shock or the like, can considerably influence the result. A similar thing cannot take place if a concave meniscus is present, and this is artificially formed by pushing the lifter down to the appropriate height of the edge of the measurement, where it then automatically sucks off, as explained above measuring extremely quickly and with constant accuracy in such a way that after each time the measure G has been filled, the valve α is opened and the liquid is poured into any vessel Q through the

Claims (2)

downpipe b falls. The dimension G, which is then to be provided with the appropriate graduation marks, can also be used for fine partial measurements, in that the siphon H is set so low with its tip that it sucks up to the relevant graduation mark. When this device is modified (Figs. 4, 5 and 6) for measuring very small quantities of liquids, there is no automatic filling from the filling vessel M, since one then does not have just as large quantities at once; M falls away at all, and the filling is done by carefully pouring through the funnel T inserted in the upper closure, which opens just above your measure G, while the excess is drained off by K and the meniscus is sucked off. The filling is done exactly as described above, except for the desired Mefsstrich. With such small quantities, which are hereby measured, for example, to determine percentages, it is necessary to be able to remove every residue from the measure for which purpose the neck e is attached to the cylinder E, in the the tube S opens with mouthpiece R, through which one blows or after each measurement made. sucks, the latter to remove the droplet stuck at the mouth of the funnel T and the former to remove the droplet stuck at the mouth of the outlet b. An example of the practical applicability of this device: In beet sugar cultivation, the seedlings are checked for their sugar content before they are set, which is done by removing a small portion, prizing it into juice and adding four times the amount of lead acetic acid, etc. This measurement is now carried out Both the lead vinegar and the beet juice must be done as quickly and accurately as possible, which is greatly facilitated with two devices of this invention, namely one according to FIGS. 1 to 3 and one according to its modification, FIGS. 4 to 6. In this example, a further improvement of the device in Figs. 1 to 3 is to be indicated in such a way that it is advisable to place a double piston, Fig. 7, on the upper closure, the upper part of which is filled with a mixture of Glauber's salt and unslaked lime so that the atmospheric air is first filtered here before it enters E, because otherwise it would form lead carbonate in connection with lead acetic acid; the same filtration, of course with an appropriate mixture each time, can be used when measuring all other substances. Patent claims: 1. An apparatus for the automatic measurement of liquids, Fig: 1 to 3, characterized in that the measure G, mounted in a closed space E above the filling vessel M , is provided outside the former with a cock α and waste pipe b , by means of a pressure line LL "K 'K is filled by overflowing.mif automatic return to M and is regulated by the siphon H for its accuracy or for using the partial measuring device, with or without a filtration device, FIG. 7. 2. The modification, Figs. 4 to 6, of the apparatus mentioned in 1. for the purpose of measuring very small quantities of liquids, such that the inflow into the dimension G is done by hand through the funnel T , and the elimination of each Residue by suction respectively. Blisters on the mouthpiece R. 1 sheet of drawings.