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Патент USA US2117170

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Patented May 10, 1933 ‘
UNITED STATES earner cries
John Z. Hoyer, Conshohocken, Pa... assignor to
Kimble Glass Company, Vincland, N. 5., a
corporation of Illinois
Application September 18, 1936, Serial No. 101,511
1 Claim. (01. 265—45)
This invention relates to hydrometers of the tending ?ange 22 which engages the adjacent
type in which the liquid to be tested is drawn into free end of the barrel to form a liquid tight joint.
a transparent barrel and retained therein during
The body portion of the plug which ?ts snugly
the testing operation.
Within the barrel H1 is provided in its outer pe
One of the primary objects of this invention riphery with anv annular groove 24, this groove 5
is to provide a plug for one end of the barrel
through which the liquid to be tested may be
readily drawn into the barrel, the plug, however,
being so constructed as to prevent the liquid from
in trickling out of the barrel during the testing
A further object of the invention is to provide
a plug of the above mentioned character which
will be simple in construction and capable of
1-? economical production on a commercial scale.
Numerous other objects and advantages of this
invention will become more apparent as the fol-
lowing description proceeds particularly when
reference is had to the accompanying drawing
20 wherein
Fig. l is an elevational view of a hydrometer
showing a plug constructed in accordance with
the teachings of this invention associated with
the Same;
being preferably spaced from the outer end of
the plug about three-quarters of the length of
the plug. Communicating with the annular
groove 24 is a passage 26 which extends inwardly
toward the center of the plug and communicates 10
at its inner end with a bore or passage 28 which
Opens through the outer end of the plug. At a
point diametrically opposite the passage 26 the
plug is provided with a second passage 30 which
is relatively short and which communicates at 1.5
its one end with the annular groove 24 and at its
other end with a passage 32 which opens through
the inner end of the plug and thus communicates
with the interior of the barrel.
A nipple 34 formed of hard rubber or the like
@5 preferably secured- in the passage 23 and has
Its one end projecting beyond the outer end of
the plug’ the suctlon up M bemg Sleeved Over and
secured to the projecting end of thisnipple as
Fig. 2 is a fragmentary sectional view of a por-,
clearly illustrated m Fig" 5 of the drawmg‘
tion of the Structure shown in Fig 1;
.1’ _ In using the device, the free end of the suction
Fig. 3 is a transverse sectional view taken sub- up M may be.mserted m th‘? Solutlon to be tested
stantia’uy on the line 3__3 of Fig 2; '
and the suction bulb manipulated to draw the
Fig 4 is a transverse sectional .view taken sub30 stantiany on the line 4__4 of Fig‘ 2; and
sohmon upwardly Into the bar-r 61 ID‘ It W111 be
apparent that the solut1on W111 pass upwardly 30
throu h
assa e
IS in the suction ti
throu h
Fig. 5 IS a fragmentary longitudinal sectional
boresgzg pand gzs and into the annulaii. passage
view taken substantially on the line 5-5 of Fig.2.
formed between the inner wall of the barrel m
Referring to the drawing wherein like refer-
and the plug by the annular groove 24' The ]iq_
ence characters designate correspondlng parts
35 throughout all views, the numeral l0 designates
uid will ?ow around this groove and then be
drawn into the barrel m by Way of passages 30 35
a barrel which is preferably formed of glass or
some other suitable transparent material and
which is adapted to receive the liquid 01‘ Solution
40 to be tested. In accordance with the usual practioe, the barrel is provided at its one end with a
liquid Suction and eXpelling bulb‘ 5'2 and at its
other end with an elongated suction tip M which
is preferably ?exible and which is provided with
45 the passage '9 through Which liquid may be
drawn into the barrel Disposed in the barrel is
a hydrometer float '3 of any Suitable CO-HStI‘UCi-
and 3z_
After the desired quantity of the solution has
been drawn into the barrel it), the suction tip may
be removed from the solution to be tested and the 40
reading taken on the hydrometer ?oat The pas
sages in the plug 25 which place the suction tip
in ‘communication with the interior of the barrel
are so arranged that‘ the barrel does not com
municate directly with the suction tip, with the 45
result that liquid will not trickle from the interior
of the barrel out through the suction tip during
the testing operation. Additionally, it might be
The numeral 20 designates a plug by which the
50 suction tip M is secured to and placed in communication with the interior of the barrel H).
This plug is formed of some compressible material
such as rubber or the like whereby it may be
noted that the passages in the plug are so ar
ranged as to form an air pocket within the plug 50
which effectively seals the liquid in the hydrom
eter barrel making it necessary to compress the
bulb 52 to expel the liquid from the barrel after
snugly ?tted in the open end of the barrel I0 and
the plug is further provided with a laterally ex-
the testing is completed.
While one embodiment of the invention has 55
been described with some detail, it is to be under
stood that the description is for the purposes of
illustration only and is not de?nitive of the limits
of the inventive idea. The right is reserved to
make such changes in the details of construction
and arrangement of parts as will fall within the
purview of the attached claim.
I claim:
In combination, a hydrometer barrel having
an open end, a resilient plug inserted in the open
end of said barrel, said plug having an axial pas
sage extending from one end of said plug partly '
through said plug, said plug also having a second
passage extending from the other end of said
plug partly through the plug and being out of
alignment with the ?rst-mentioned passage, said
plug being further provided with a peripheral an
nular groove cooperating with the inner wall of
the barrel to form an annular passage and having
radial passages connecting said ?rst and second
mentioned passages with said annular groove, and
an inlet nipple including a stem portion inserted 10
in said ?rst-mentioned passage.
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