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MORRIS MATTSON, OF NEW YORK,.N. Y.
Latte rs Patent No. 85,318, ma December 29, 1868.
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Ifhe Schedule referred to In these Letters Patentand pan of the same.
To all whom it may concern.- I
Be it known that I, MORRIS MATTSON, of the city of New York, in the county of New York, and State of New York, have inventeda new and useful Improvepump, resembling that patented to me on the 8th day of September, 1868, but diflering therefrom in some particulars, which renders it better adapted for use un-,
der certain circumstances.
Figure l is a general perspective view of my improved instrument, complete.
Figure 2 is a vertical. section of the vacuum-glass, and showing also the different positions of the breast .as it rises in the glass.
Figure 3 is a sectional view of the exhausting-bulb. The breast-pump patented to me, September 8, 1868, consisted of two principal parts-a vacuum-glass, with a trumpet-shaped mouth, so formed as to prevent any essential compression of the milk-ducts when the exhaus tion is produced, for the purpose of drawing the milk,
and an elastic exhausting-bulb, having double valves, 2'. e., an inlet and an outlet-valve.
At the time of obtaining such patent, it was considered that a bulb, to be most efficient, should have a double set of'valves, but subsequent experiments have shown that, for some uses, or for useunder certain conditions of the female breast, a breast-pump with an exhausting-bulb having but a single valve, is preferable.
In the use of an elastic bulb, having double-valves, such valves are arranged at opposite ends of the bulb, and, in compressing the bulb, the inlet-valve closes, and does not permit any portion of the air, within the bulb undergoing compression, to pass into the vacuum-glass or cup. The single valve 0', however, which is arranged at the upper end of the bulb A, as an outlet-valve, has A a difi'erent action. v
When the bulb is compressed, the air which it contains. does not entirely escape through the outlet-valve a, but a portion of it is forced back into the vacuumglass B, and cannot be wholly expelled, without further compression and expansion of the bulb.
A reference to fig. 2, and the dotted wave-lines a b. c therein, showing difierent positions of the breast, will show more clearly how the use of a single valve produces a different result from the use of the double valves.
If the vacuum-glass B, in proper working-order, be placed in contact with the breast, in the usual manner, so that there shall be no leakage of air, and the bulb, fitted with double valves, be slightly compressed, and then allowed to expand, the breast will ascend to'the wave-line a,'and there remain stationary If the bulb be slightly compressed a second time, and then allowed to expand, the breast, without receding from a, will ascend to the second line, b, and, in the same manner, will ascend to the wave-lines, from similar compres, sion and expansion of the bulb.
If a bulbwith a single valve, like that represented in section-in fig. 3, be used in connection with the vacuumglass B, instead of a bulb with double valves, and such bulb be compressed at intervals, as before mentioned, the
breast will ascend to the wave or dotted lines a b 0, but with the following difference in action or operationthat, at the moment the bulb is compressed, the breast will first descend a little below its line, and then ascend to a higher line at the instantthe bulb undergoes expansion. This action is due to a portion of the air being forced into the vacuum-glass by the compression of the bulb, there being no valve to prevent it, and the press are of the air thus produced is sufficient to cause the breast to recede, as already described. This action, or
. the depressing and rising of the breast, is fepeated'at every compression and expansion of the bulb. Thus we have what may be termedvibratory movements of the breast, and such movements may be rapid or slow, in
proportion as the bulb is rapidly or slowly operated.
These vibratory movements are closely analogous to the movements produced by the nursing of the infant,
and are therefore the closest possible imitation of use ture.
In a breast in which the milk flows freely, there seems to be no choice between the bulb having-single or double valves, but at the commencement of lying-in,
movements, resulting from its use, aid essentially in procuring a gentle and painless flow of the milk.
Such vibratory movements of the breast, resulting from the useof a single-valved bulb, are also useful in other vacuum-instruments besides the breast-pump;
for instance, serving to establish a better circulation in blood-vessels, which are to'rpid, or inactive.
hausting-mechanism or instrument, having or employ-- ing a single valve or valvular apparatus, substantially as and for the purposes set forth. M. MATTSON.
Witnesses:
S. D. LAW Ennn.B. mes.
Instead of a'bulb, with a lnetallic nose and pipe, d, 1 ,to connect, as shown, with the vacuum-glass by means of a rubber cap, f, as shown in fig. 1, the bulb may have a tubular neck, to couple directly-with the vacuum-