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Патент USA US2113893

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April 12, 1938.‘
D. H. Loosu
2,113,893
SURVEYING AND LEVELING INSTRUMENT
Filed May 14, 1937
.
3 Sheets-Sheet l
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April 12, 1938.
D. H. LOOSLI
2,113,393
SURVEYING AND LEVELING INSTRUMENT
Filed May 14, 1937
3 Sheets-Sheet 2
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April 12, 1938.
D. H. LOOSLIQ
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2,1 13,893v
SURVEYING AND LEVELING INSTRUMENT
Filed May 14, 1937
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Inventor
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2,113,893
Patented Apr. 12, 1938
UmTEDsTATEs ‘PATENT OFFICE
Dimond‘ H. LooslLLAshtoh, Idaho
Application May 14, 1937,1_Serial No. 142,702
4 Claims. (01. 33-73)
This invention is an instrument, in the nature
of a level which may be used for surveying and
indicating the rise and fall orrheight of terrain
and amoung the objects of theinvention are to
provide a device or instrument of this character
which can be readily carried from place to place,
easily set up for use, and will at the same time
have a high degree of accuracy in‘ leveling opera
tions.
ill
‘
a
>
'
The invention includes the provision of an im
proved target to be used in conjunction with the
improved level.
The invention together with its objects and ad
vantages will be best understod from a study of
the following description taken in connection
with the accompanying drawings wherein:—
Figure l is an elevational view of the instru
ment.
‘
‘Figure 2 is a detail sectional view taken sub
V
Figure 3 is a detail View taken substantially on
the line 3—-3 of Figure 1.
manner of connecting ?uid tubes or columns to
the elbows at the opposite ends of a tubular arm.
Figure 5 is a plan view of the supporting head
i
‘
Figure 6 is a perspective view of one of the
glass'tubes or water ‘columns.
30
‘
'
Threaded or otherwiseprovided on the respec-
tive opposite ends of the tube l8 are elbows I9.
Threaded intov the elbows [9 are nipples 20.
26
As clearly shown in Figure 4 each nipple 20 '
'
Figure 4 is an enlarged detail View showing/the
of a tripod and-
15’
tubular member If at the desired angular posi
tion of adjustment.
>
stantially on the line 2—2 of Figure 1.
of the jaws of the clamp are accommodated be
tween the sides of the U-shaped member l2 and
are apertured to receive a bolt l4 that extends
through the‘ apertured sides of the U-shaped
bracket l2 and is equipped with a wing nut l5
which when screwed home on the bolt serves to
draw the sides of the U-shaped member l2 and
the ends of the jaws of the clamp I3 inwardly.
At the opposite end thereof the jaws of the
clamp l3 are also apertured to accommodate a
clamping bolt l6 equipped with a winged nut I1
and which cooperates with the bolt I4 to secure
the ‘jaws of the clamp about an elongated tubu
lar member l8. In this connection, it will also
be appreciated that the bolt l4 serves as a pivot
for the clamp l3 and also serves to secure the
1
has threadedon its free end a packing nut 2!
with which, in turn is threadedly engaged at gland
nut 122 that cooperates with the packing nut 2|
to secure at the freeend of the nipple 20 a packing
'23 throughwhich one end of a glass or other
transparent water tube or column 24 extends
into "the nipple 20.
-
“ Figure 7 is an elevational view illustrating the
manner of using the level and target.
Figure 8 is a fragmentary elevationalgview of
Also, and as-clearly shown in Figures 1 and 3, 30
there is provided in the tubular member l8 ad
vthe 1 target . rod.
valve 25.
Figure 9 is a fragmentary side elevational View
3:3 Li of the target rod with the target mounted there
on.
jacent one end thereof a manually operable
‘
For protecting the sight glasses 24 ‘when the
leveling instrument is not in use there is pro
vided for each sight glass 24 a tubular protector
Figure 10 is a view taken at right angles to
Fig. 9 and showing the face of the target.
Referring to the drawings by reference numer-v
casing 26, as shown in Fig. 4 and the casing 26
at one end is internally threaded to tread onto
als it will be seen that in the preferred embodi
ment thereof the instrument‘ includes a tripod or
stand which in the present instance consists of a
?gure.
supporting head 5 having a tubular center portion
6 from which radiates ?anges or wings 1. Se
:2 cured to the wings ‘I through the medium of bolts
and wing nuts 8 are the upper ends of supportingv
legs 9 which are inclined at an angle correspond
‘ 7 ing to the angle of inclination of the outer edges
of the Wings 1.‘
-
The tubular or cylindrical body 6 of the head
member 5 accommodates the bolt l0 equipped
with a wing nut H and serving to clamp between
the upper end of thehead 5 and the head of the
bolt a substantially U-shaped bracket l2.
A two part clamp I3 is provided and one end
the upper end of a gland nut 22 as shown in said
40
For use in conjunction with the leveling in
strument there is provided a target indicated gen
erally by the reference numeral 21.
Target 2'! comprises a ?at narrow elongated
rod 28 provided on one face thereof with a se
ries of graduations 29, the scale 29 being grad
uated in terms of inches and fractions thereof.
Slidable to the desired positon of vertical ad
justment on the rod 28 is a target plate 30 to the 50
back of which is secured a U-shaped member
3! that embraces the rod 28. Carried by the
member 3! intermediate its end is a spring 32
that has bearing contact with the back of the
rod 21 and serves to frictionally secure the tar
2,113,898
get plate 30 at the position of adjustment on the
rod 21.
As shown in Fig. 10 the upper half of the face
of target plate 30 is colored black while the lower
half of said face is white to provide intermediate
the upper and lower edges of the target plate a
ment relative thereto, means for Securing the
clamp at the desired position of angular adjust
ment, a leveling tube secured by said clamp and
extending at right angles from the tripod, elbows
at the ends of the tube, packing and gland struc
tures mounted upon said elbows, sight glasses
horizontal line 33 thereon to correspond to what . having ends extending into said elbows through
may be the fluid surface level.
said gland and packing structures, and a valve
It will be understood that water is placed in
10 the tubular member l 8 and the water columns or
glass tubes 24 to an amount sufficient to provide,
under normal conditions, a water level at a point
coinciding with substantially half the length of
the glass tubes or water columns 24.
It will be
15 further noted that the tubes are opened at their
upper ends so that beads are formed in the glass
at the top of the water columns therein and
which beads are easily seen from quite a distance.
In the practical operation of leveling, the in
strument is set up, and the instrument may then
be leveled by means of the two heights of fluid or
water in the glasses 24. The use of the rod 28
with a target thereon is usual and customary in
both leveling and surveying operations. After
25 the instrument and target have been set up, and
the instrument leveled, the rodm-an will take the
rod a predetermined distance away from the level
and by sighting across the liquid so that the two
surfaces will coincide with the mark or line 33 on
30 the face'of the target plate 30, this will give the
increase of height or the decrease, thus showing
the variations in the contour of the terrain.
It will be further understood that when the in
strument is in use valve 25 is in open condition.
35 When however the leveling instrument isbeing
carried from place to place valve 25 is closed, and
with the valve closed, and the instrument being
carried at an angle of about 45° which is the usual
angle of the instrument when being carried on the
shoulder of the rodman, the water in the tube
above the valve cannot ?ow past the valve and
including a head and inclined legs secured to said
head, said head having a vertical axial opening
therethrough, a U-shaped member disposed on
said head, a bolt extending through said U-shaped 15
member and the opening in said head and secur
ing said Uz-shaped member to the head, a leveling
tube, a clamp embracing said tube intermediate
the ends of the latter, means pivotally connecting
said clamp to said U-shaped member and includ 20
ing means for securing the clamp ‘at the desired
position of angular adjustment, elbows on the re
spective opposite ends of said tube, sight glasses
mounted upon the upper ends of said elbows, and
gland and packing assemblies securing the sight 25
tubes to the elbows.
3. A leveling instrument comprising a tripod, a
clamp mounted on the tripod for pivotal move
ment relative thereto, means for securing the
clamp at the desired position of angular adjust 30
ment, a leveling tube secured by said clamp and
extending at right angles from the tripod, elbows
at the ends of the tube, packing and gland struc
tures mounted upon said elbows, and sight glasses
having ends extending into said elbows through 35
said gland and packing structures, protector
tubes for said sight glasses, and interengaging
means on said protector tubes and on said pack
ing and gland structures for releasably securing
the protector tubes in position circumjacent the
sight glasses.
the water below the valve cannot escape as it will
4. In a leveling instrument of the character
become entrapped between the valve and the el
bow on the lower end of the tubular rod. Thus
in this manner the loss of water during trans
portation of the instrument is effectively guarded
described, a leveling tube, elbows at the respective
opposite ends of the tube, packing and gland
structures respectively mounted upon said elbows,
sight glasses having ends extending into said el
bows through said gland and packing structures,
said gland structures having threaded upper ends,
and protector tubes for said sight glasses having
against.
Also with the protector tubes or shields 25 in
position.‘ the water tubes 24 will be protected
50
mounted in said leveling tube adjacent one end of
the latter.
10
A leveling instrument comprising a tripod
against breaking.
Having thus described the invention, what is
claimed as new is:
1. A leveling instrument comprising a tripod, a
clamp mounted on the tripod for pivotal move
internal threads at one end thereof for screw
threaded engagement with said upper ends of the
gland structures.
DIMOND H. LOOSLI.
50
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