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Патент USA US2403799

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July 9, 1946.
2,403,799
G. E. HOLTON ETAL.
TENSIOMETER
Filed ‘April 28, 1945
>
' INVENTORS.
GEORGE E HOL TOM
_ CHEL -£. HEGLU/VD 9‘!
Patented July .9, i946
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UNITED ; STATE s2,403,795@PATENT,
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OFFICE
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I TENSIOMETER
George E. Holton, Carl E. Heglund, and :James V. .
Manson, Jackson, Mich.,' assignors to HiIIGkIBY-r.
I.’ Myers Division of Kent-Moore Organization,
. I‘nc.,' Jackson, Mich, ‘a corporation of Michigan
fAp'plication April 28, 1945, Serial No. 590,768
3 Claims. (01. 73-144)
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'This' invention relates to __improvements in '
inwardly toward the interval between said seats
to de?ect a length of tensioned cable bridged
cable tensiometers.
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“An object is to ‘provide asimple, rigid,~easily
across said seats and which instrument includes
operable cable 'tensiometer through the usewof
gage mechanism having a plunger spring urged
which the tension imposed upon‘ a cable may be I. 5 _ outwardly toward the interval between
I said 'cable
‘quickly and accurately determined in order that
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seats which plunger is responsive't‘o the de?ec
the cable tension may, if necessary, be'properly ‘
'tion‘inwardlyof the cable'to register on the gage
adjusted.
the
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Such an instrument is particularly adapted
extent
of such de?ection.
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The cable de?ecting means which is spring
for use in the aircraft industry to determine the i0 urged inwardly toward the interval between said
tension upon, the various cable?3 which tfornrliJ a
seats includes a swingable handle to be actuated
part of aircraft.
plier like relative to a ?xed handle of ‘the in
The instant
ensiome er
e-
longzhto
ftlzgte glass
of dtentiocimetteriJ wheléeiéi a
len
0
611510118 Ca 8 0 8 BS 6 is
strumeintmeans
to withdraw
the cable contacting part
away from the section of cable
of sai
Supported upon adpail‘ 191i Spaced apartdagviés 1,5 bridgedacross said seats to permit the instru
vor cable seats an mec anism is provi e
o
de?ect such length of cable against its tension
mem; to be engaged with or disengaged from a,
came,
I,
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' ‘between such anvils to measure‘ the tension imposed upon the cable
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The instrument is so constructed that when
;
a de?ection measurement is taken, if the dial of
‘in Obie? WOIfI'101111116 6Xmlziihi’glon
1S 159 ‘PI‘éWIdQ 34:11’ 20 for.
the reading
instrument
is disposed so as not to be visible
1 1 S 8» Fall‘ 0 Space
the dial, the indicator may be tem
‘ins rumen
apart putwardlyfacing anvils adapted‘to Span
porarily locked in position and the instrument
-»ahs_e(1:f1on
tof the ttensllorzleg
(13:21;
'W 10 1115111111811
111011
a 5130a 61105135221763;
_
rlelmcaved
from
to a position at7 which
t e ia is
visi I?iefcable
e or reading.
exert a substantially. constant pressure inwardly 25
other objects’ advantages ‘ and meritorious
upoh the span of cable eiftendmg between the
' aim/PS to Qle?ect the_ca'b_1e mwa'r d_1y between the
features will more-fully appear in the, follow
ing description, appended claims and accom
anvils a distance which is a function of the ten-
panying drawing wherein:
51011 Imposed “P011 the cable’ and W,h1ch ntstru'
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Figure 1 is a front elevation of the improved
ment further includes a gage provided with a 30 tensiometer held open to receive a cable
plunger which is yieldingly held qutwardly pq'
' Fig. 2 is 'a rear elevation of the same ten
glal‘glggleiémzgggsgigagei?vgfdgynvés $11:
siometer‘showing the cable de?ected.
in response to de?ection of the cable to register
,on the gage the measure of the de?ection of the
piglgz" 3
35
'.
?‘ sectlonal mew taketn on hne 3_3 of
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cable under the constant pressure exerted there- ' 43g‘; EH1; g‘ sectlonal new taken on_ the ' hne,
upon.
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The gage readings indicated by the actuation
.
of the plunger may be in any desired increments
thousandths of‘ an, inch. A table is provided by
various
de?ection
readings
may
be
translated into' tension measured in pounds. A
particular instrument is accurately operable over
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o 6 , g‘
of measurements of cable de?ection such. 'as 40 t
which the
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t
1
_
g'h 1S 9‘_ ragmen a?’ e,e1‘;at11(1m of ‘Ehe Struc
ufe 5 down 111
re ease
'
lgure
_
.
Wlt . t e Sprmg catch
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The tenslometer'comprises a frame I0 having‘
a ?xed handle '2 at ohe end and a pan‘ of Spaced
a determined range of cable tension and with a 45- apal'? outwardly facing V—n0tched anvils or
limited number of cables of di?erent diameters.
Seats '4 at the oppqslte end- The hody 0f the
>F°r examine, a single instrument may be accurately' operable with cables varying in diam-
frame is_pr0v1ded with an intermediate web 16
Which Wlth the margin of the frame forms a
eter from 113‘ to 1A1 of an inch and tensioned over
a range varying from 10 pounds to 300‘ pounds.
_
5 Fég- f5Fi1s ‘i’ Sectlonal. Vlew taken on the- 11116
recess or pocket on each side of the web as shown
50 in Figures 3 and 4.
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A meritorious feature resides in the provision of
an instrument which exhibits a ‘pair of out-
Vflj/‘ithinthev pocketlon (line dside; of ltahe
we? is
sea ed a conventiona dia in ica or
; A ace
wardly-facing spaced apart cable seats and in'cludes cable de?ecting means which is spring
plate 20 is secured by, screws 22' or the like to
the frame on this side and is cut out to encircle
urged under a 'substantiallygconstant pressure 55 the dial indicator as‘ shown in Figures 1 and 3.
a
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2,403,799
3
4
The face of the dial is
leaf 48 has a handle 49. The upper leaf 48 is
cut away at 52 and the spring catch may be ro
tated about the plunger so as to permit release
of the portion 48 by the ?ngers 44 so that such
graduated as illustrated to register in thou
sandths of an inch the inward depression of the
tional pressure against the plunger 24 to hold it
The dial indicator is provided with a plunger 24
which is held outwardly by spring pressure to
ward the interval between the cable seats l4
as shown in Figure 1.
portion 48 will snap upwardly and exert a fric
at adjusted position. The plunger 24 is actuated
by a very light spring pressure within the gage
itself. It is also apparent that the spring catch
cable seated upon the seats [4 and as this cable
is de?ected the inward movement of the plunger 10 device may be so rotated that the part 48 may be
held underneath the ?ngers 44 so as to permit
will be indicated on the dial in the particular
free reciprocal movement of the plunger 24.
graduated measurements shown on the dial.
What We claim is:
Means is provided to de?ect a section of cable
1. A tensiometer device comprising, in combi
bridged across the seats I4 which means is here
illustrated in the form of a handle 25 pivoted at 15 nation, a frame having on one side thereof a pair
of spaced apart extensions each provided with
28 to a portion 30 of the frame that overhangs
an outwardly facing cable engaging anvil on the
one of the anvils. This handle is provided with
plunger from its zero setting. The plunger
when held outwardly is adapted to engage a
end thereof, an arm pivoted to one of said exten
sions to one side of the anvil thereof and carry
a cable engaging part or hammer 32 which is so
disposed as to overhang the cable stretched be
tween the anvils as , shown in Figure 2.
The 20 ing a hammer-like part swingable with the arm
into and out of the interval between said anvils
frame .is cut away as illustrated in Figure 2 and
this handle swings through the recess on the
and in the plane thereof, spring means coupled
to said frame and to said arm urging the latter
in the direction to cause said part to enter the
springs 34 connected at one end with the handle 25 interval between said anvils and de?ect a cable
section extending therebetween, a gauge carried
and at the opposite end with the frame so that the
by said frame having an outwardly urged spring
hammer 32 engages and de?ects a cable stretched
pressed plunger adapted to bear against a cable
between the anvils. This swinging handle there
section extending between the anvils on the side
fore is adapted to.eXert a substantially constant
of the cable section opposite said part and trans
spring pressure upon a cable engaged by the de—
mit to said gauge the extent of de?ection of the
vice. The response of the cable in distance of
de?ection will depend ‘upon its resistance to de
cable section, and .a pair of pliér-like handles on
?ection. The de?ection of the cable under the
the side of the frame opposite said extensions, one
constant spring pressure is measured on the dial
connected to said frame and the other tosaid arm,
I8 which may be graduated in thousandths of an 35 so arranged relative .to one another that when
opposite side of the webll? from the dial [8.
The handle 25 is held normally by tension
inch. A face plate 36 is secured by screws 38 or the
like to the frame It! over the recess within which
gripped and compressed together by a hand
against the tension of said spring means the ham
mer-like part is swung out of said-interval to
the springs and handle portion are disposed and
this face plate has associated therewith a table
release the cable section.
,
40
or scale 40 shown in Figure 2.
2.. A tensiometer device comprising, in combi
When the de?ection of the ‘cable is read on the
nation, a frame having ‘a :pair of spaced apart
dial in thousandths of an inch this may be trans
extensions each carrying an outwardly facing
lated into tension measured in pounds for any
cable engaging anvil on the end thereof, an arm
particular cable shown on. ‘the table '48.
t will
pivoted to said frame and provided with :a ham
be noted that this table in the left-hand ‘column 45 mer~like partswingazble therewith into and out of
indicates cable diameters varying from 11:; to v1/4
the interval between‘said anvils and in the :plane
‘of an inch. The top horizontal row of the fig
‘thereof, spring means coupled to said frame and
ures indicates tension in pounds while the squares
to said arm urging the latter in the direction to
in the horizontal rows opposite each cable diam
eter indicate de?ection ?gures for a cable "of that 50 cause said hammer-like part ‘to enter said inter
val and de?ect acable section against which said
diameter when tensicned to the number of pounds
anvils
bear, a pair of plier-like handles, one cen
indicated at the head of the column. It is there
‘nectedto said frame ‘and the other to said arm, so
fore possible to translate the de?ection readings
arranged relative to one another that upon being
for any diameter of cable indicated on the table
into pounds tension. Anysingle instrument ‘is .ca 55 squeezed together by a :hand against the tension
of said spring means the hammer-‘like part is
pable of taking care of a certain number of cables
swung out of said interval to free the cable sec
of a determined range of diameters and Where
tion de?ected thereby, a gauge carried‘ by said
the tension also comes within a determined range.
In some cases readings might have to be ‘taken
with the instrument where it would not be {pos
sible to read the'?gures on the scale while the
instrument was engaged with the cable. There
has therefore ‘been provided a spring catch ar~
rangement'which is adapted to engage the plunger
24 at any particular ‘point and maintain it re~
leasably at such position. This spring catch ar
rangement is ‘shown in Figures 5 and '6. A sleeve
42 is secured about the portion 25 of the dial stem
which surrounds the plunger 25 and this sleeve
has a pair of opposed overhanging ?ngers 4-4. A
dual leaf spring device has a .d-iskshaped portion
46 secured underneath the fingers I34 and is ro
tatable about the plunger 24. To the ‘disk 45
there is secured an upper leaf .48 which is nor
‘ mally held upwardly as shown in Figure 6. This
frame ‘having an outwardly urged spring pressed
plunger adapted to ‘bear against a cable section
extending ‘between said anvils on the side of the
cable section opposite said ,part and transmit to
said gauge the extent of de?ection of the cable
section, and means manually operable to releas
65 ably lock said plunger in any adjusted position
and thereby .retain the reading of said gauge
regardless of the freeing of the cable section by
60
said part.
3. .A tensiometer comprising, in combination, .a
70 frame exhibiting a pair .of spaced apart cable
seats adapted to receive a .cable section extending
therebetween, cable de?ecting means carried by
said frame having .a part normally urged under
substantially constant pressure against a .cable
75 section extending between said seats, a gauge
2,403,799
5
6
carried by said frame having a spring urged
plunger adapt-ed to bear against the cable section extending between said seats and transmit to
the gauge the extent of de?ection of the cable
section, means yieldingly urged into ‘engagement 5
with said plunger to lock the same in any adjusted position regardless of the removal of the
cable section from said seats, and means nor
mally holding said last means out of engagement
with the plunger but manualy operable to release
the same for engagement therewith.
GEORGE E. HOLTON.
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CARL E. I-LEGLUND.
JAMES V. MANSON.
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