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Патент USA US2128506

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Aug- 30, 1938.
Filed July 14, 1937
5 Sheets-Sheet l
ff,’ 2
.63.‘: ‘I
A iiorneys
Aug. 30, 1938.
Filed July 14, 1957
3 Sheets-Sheet 2’
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?auni'ang M
Patented Aug. 30, 1938 -.
I Bruce M. Staunton, Wichita, Kans.
Application July 14, 1937, Serial No. 153,681
3' Claims. (Cl. 33-215)
The present invention relates to inclinometers
designed primarily for use upon air craft and
has for its principal object to provide a chart
_ upon which the degree of inclination of the air
5 craft during its ?ight is recorded, both of a longi
tudinal and transverse character.
A further object is to provide a clock operated
chart whereby to determine the exact time at
which any deviation from the true horizontal
10' position of the air craft occurs.
A still further object is to provide an apparatus
of this character of simple and practical construc
tion, relatively inexpensive to manufacture and
installed in operative position upon the air craft,
15 which embodies a convenient construction for re
moving and replacing the chart and which is
otherwise well adapted for the purposes for which
the same is intended.
Other objects and advantages reside in the de—
20 tails of construction and operation as more fully
hereinafter described and claimed, reference be—
ing had to the accompanying drawings forming
part hereof, wherein like numerals refer to like
parts throughout and in which
Figure l is a front elevational view.
Figure 2 is a top plan view.
Figure 3 is a side elevational view with parts
broken away and shown in section.
Figure 4 is a rear elevational view showing the
30 mounting for the clock mechanism.
Figure 5 is a longitudinal sectional view through
the scriber.
Figure 6 is a transverse sectional view taken
' substantially on the line 6-6 of Fig. 5, and
Figure '7 is a detail of one of the pivoted ends of
the scriber supporting bracket.
Referring now to the drawings in detail, where
in for the purpose of illustration I have disclosed
a preferred embodiment of the invention the nu
40 meral 5 designates a substantially U-shaped
bracket adapted for mounting in a suitable posi-v
tion upon the air craft, the bight portion of said
bracket being formed into an upstanding base 6
having guide ?anges l at its opposite side edges
. 45 received in channels 8 of the base portion 9 of a
clock case ID, the ?anges l and channels 8 being
of substantially dove-tailed construction as more
clearly shown in Fig. 4 of the drawings to pro
50 vide for the removal of the clock-case by the
rearward sliding movement thereof. The base
portion 9 of the clock-case is secured to the base
portion 6 of the bracket by means of set screws | I.
The arms I2 of the bracket extend forwardly
55 as more clearly illustrated in Fig. 3 of the draw
ings and are formed with ?attened heads [3 at
their upper end.
A second U-shaped bracket M has its legs 55‘
positioned inwardly of the legs 92 of the bracket
5 and the upper ends of the legs i5 are also pro- 5-;
vided with ?at heads l6 positioned ?atly against
the heads l3. The heads 53 and iii are formed
with central openings l‘! within which a bolt it
is inserted and secured in position by a wing nut
Hi. The inner faces of the heads 63 and it are 10'2
also formed with annular channels 20 forming a
raceway for a set of ball-bearings to provide anti~
friction means between said head. It will thus be
apparent that the bracket 54 is pivoted to the;
bracket 5 for swinging in a longitudinal direction
with respect to the air craft upon which the device
is mounted.
The bight portion of the bracket M is enlarged
as at 2| intermediate its ends and formed with a
vertical slotted opening 22 for receiving a pendu
lum arm 23, said arm being secured to the bracket
l4 intermediate the ends of the arm by a bolt and
wing nut 24. The opposed faces of the pendulum
arm and the inner walls of the slotted opening 22
are formed with annular channels 25 within
which to receive ball bearings 26, the pendulum
arm thus being supported for transverse swinging
movement. The lower end of the pendulum arm
is threaded as at 2'! for threadedly receiving a
ball or weight 28 secured in vertically adjusted 30
position by a lock nut 29.
The upper end of the. pendulum arm 23 is pro
vided with a threaded opening 33 for threaded
engagement by a reduced threaded extension 3!
formed on a barrel 32 of a scriber device shown
in detail in Fig. 5 of the drawings. The barrel
32 is open at each end, the end of the barrel op
posite from the threaded extension 36 being pro
vided with a threaded plug 33 having a central
opening for slidably receiving a stem 34 extend;
ing entirely through the barrel. A collar 35 is
secured to the stem within the barrel forming an
abutment for one end of an expansible coil spring
36, the opposite end of said spring abutting the
plug 33 whereby to yieldably urge the stem in a
direction. toward the threaded extension SE.
The stem 33 is formed with a bore extending
therethrough within one end of which is posi
tioned a lead 3? frictionally held within the bore by
a cap 38 threaded on the forward end of the stem.
The bore at the rear end of the stem is internally
threaded as shown at 39 for threadedly receiving
a screw 40 having a manipulatinghead iii. The
inner end of the screw 40 is provided witha plung
er 42 engaging the lead to feed the lead forwardly. 55
Spaced outwardly from the base of the clock
casing I9 is a chart 43 in disk form secured to a
threaded extension M of the arbor of the clock,
the chart accordingly being rotated by the clock
As will be apparent from an inspection of Figs.
1 and 3 of the drawings the scriber is projected
from the barrel 32 in a position for contacting the
surface of the chart and accordingly any devia
tions of the air craft from a true horizontal plane,
ing arms inclined in a longitudinal direction, a
clock mechanism mounted on the bight portion
of said bracket, a chart mounted for rotation on
the arbor of the clock, a scriber having contact
with said chart, a U-shaped bracket having its
ends pivotally supported to the arms of said ?rst
named bracket for longitudinal swinging move
ment and a pendulum arm having its upper end.
attached to said scriber, said arm being pivotally
supported intermediate its ends to the bight por
10 either in a longitudinal or transverse direction tion of said last named bracket for transverse
swinging movement.
will be recorded upon the chart 43.
, 3. An inclinometer comprising a U-shaped
' It is believed the details of construction, man-_ bracket adapted for mounting transversely of a
ner of operation and advantages of the device will ‘ vehicle, an upstanding base on the bracket hav 15
be readily understood from the foregoing without ing overhanging side ?anges, a clock having a
further detailed explanation.
‘base provided with inwardly positioned channels
Having thus described the invention what ‘I ‘for slidably receiving said ?anges, a chart
claim is:-—
1. An inclinometer comprising a substantially
U-shaped bracket adapted for mounting upon a
20 vehicle transversely thereof, said bracket embody
ing arms inclined in a longitudinal direction, a
clock mechanism mounted on the bight portion
of said'bracket, a chart mounted for rotation on
the arbor of the clock, a scriber having contact
25 with said chart and means for supporting said
scriber upon said bracket for transverse and-lon
gitudinal swinging movement.
2. An inclinometer comprising a substantially
U-shaped bracket adapted for mounting upon a
vehicle transversely thereof, said bracket embody
mounted on the arbor of the clock for rotation
therewith, a second U-shaped bracket having its 20
arms pivotally secured to the arms of the ?rst
named bracket for longitudinal swinging move
ment, a slotted opening in the second named
bracket, a pendulum arm pivotally supported in
termediate its ends in said opening for transverse 25
swinging movement, a scriber secured to the up
per end of the arm and means carried by the
scriber for yieldably urging the same into contact
with the chart.
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