US1391000A - Hydrometer - Google Patents

Description

V. H. MEYER.

H YDROMETER.

APPLICATION FILED NOV. 29, |920.

Patented Sept. 20, 1921.

UNITED STAT-ES To all whom t may concern:

Be it known that I, VERNON` I-I. MEYER, a citizen of the Unitedi States, residing at Cleveland, in the county of'Cuyahoga and State of Ohio, have invented' certain new and useful Improvements in Hydrometers,

. of which the following is a specification. f

This invention relates to hydrometers,

land isy particularly useful in connection with hydrometers of the type used for testing storage batteries. Ordinary hydrometers have the objection that ,they are liable to become broken if dropped, and furthermore the float breaks by contact withy the barrel in handling the instrument. Some hydrometers have been provided in l which the lower part of the `barrel is made from solid rubber, but these have the'objection that the lower end of the float cannot be seen, and so it 1s often not known whether the` float has lifted or whether it is still restingon the bottom of the barrel.

he object of the present invention is t0 L provideY a fhydrometer having means to prevent breakage thereof, either 0f the barrel or the ioat, and also to prevent the hydrometer rolling around on a smooth surface.

One of the principal features ofthe invention is a rubber liner which is placed in the lower part of the barrel and which prevents contact between the float and the glas wall of the barrel. f

A further feature of the invention is the provision of a cap or band at the top of the float, which will prevent contact of the upper end thereof with the wall 'of the barrel.

A further feature of the invention is the position of means to prevent the float from enteringl the compresslble bulb at the top of the barrel, which sometimes results in breakage of the float when the `bulb is grasped.

By these and other means `to be described the oat is practically protected in all positions and it is almost impossible to accidentally break either the iioat or the barrel of the instrument, and at the same time the barrel is free from the objections incident to lmaking it in two sections, which often results in leakage at the joint.

The invention is illustrated in the accompanying drawings in which Figure l is a longitudinal section of the hydrometer. Fig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is al plan of the rubber liner.

Specification of Letters Patent.

PATENT o FFIFCE.

y Patented sept. 20, 1921.

i Application` mea Noveniber 29, 1920. serial No..427,o72.

providedl at its upper end with a compressiv ble bulb 7 and at its lower end with a tube 8, as usual. The bulb is protected exteriorly' by angular shields 9 and 10, made of rubber, one vof which fits on the neck 11 at the lower end of the barreland the other on ythe neck 12 at the top thereof. lThese shieldsare of suficient size to hold the barrel out of contactv with the surface on which the instrument is laid, and will also prevent contact of the barrel with a surface on which the instrument may be accidentally dropped. These shields therefore prevent much of the breakage incident to accidental dropping of the instrument. A glass float 13 is contained in the barrel as usual. The lower part of this fio-at is prevented from contact with the glass wall of the barrel by means of a circular liner 14, consisting of a perforated sheet of rubber which is rolled to a cylindrical form and inserted in the lower part ofthe barrel. The openings 15 in the liner are for the purpose of permitting inspection of the float, so that it can be seen when the same is actually floating. 'A plu 16 of rubber is also fitted in the lower en of the barrel, so that the float cannot strike the bottom thereof when the liquid is discharged from the barrel.

At its upper end the float is provided with a ring or cap 17 of rubber whichalso prevents contact of that end of the float with the upper part of the barrel. `And furthermore a plug 18 of rubber is fitted in the neck 12 at the top of the barrel and so revents the iloat risin into the bulb 7 or di'opping4 thereinto if te hydrometer should beinverted. This plug 18 has holes 19 to enable the bulb 7 to performits function' The float is thus practically surrounded by 'rubber protectors, in consequence of which there is little possibility of the ioat being broken by shock or by contact of the barrel of the instrument, and the barrel is also exteriorly protected by the means above described. These advantages will be appreciated by persons using such instruments, who are aware of thel objections incident to frequent breakage of the parts.

I claim: I

1. The combination with a hydrometer barrel, bulb and float, of a cushion liner in the barrel, extending suiciently above the bottom'of the barrel to prevent contact ofl the float with any part of the wall of` they barrel.

2. The combination with a hydrometer barrel, bulb and Hoat, of a cushion liner in the barrel, of suicient extent to obscure a portion. of the ioat and to prevent Contact of the float with the wall of the barrel, said liner having holes through the same through which the position of the float may be seen.

3. The combination with a hydrometer barrel and float, of a liner in the lower part 5 of the barrel; of suicient extent to obscure a portion of the' float and to 'prevent Contact of the oat with the wall of the barrel, said 15 Y linen consisting of a perforated' sheet of rubber inserted within the barrel.

In testimony whereof, I aIiX my signature in presence of two witnesses.

VERNON MEYER. Witnesses: p A

JOHN, A. BOMMHARDT, v

' HARRY G. SoHoWE.

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