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Патент USA US3100725

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Aug.13,'1963
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l3,100,720
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Aug. 13, 1963
3,100,720
F. C. CARROLL
WEIGHING SCALE
Filed Oct. 4, 1961
4 Sheets-Shes?I 2
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INVEN TOR.
FREDERICK C. CARROLL
¿É
0 ATTORNEYS
Aug. 13, 1963
3,100,720
F. C. CARROLL
WEIGHING SCALE
Filed OG’L. 4, 1961
4 Sheets-Sheet 3
wm T.m.
FREDERICK C. CARROLL
BY
,mgfm
ATTORNEYS
All@ 13, 1951‘3
F. c. _CARROLL
3,100,720
WEIGHING SCALE
'
Filed Oc’t. 4. 1961
4 Sheets-Sheet 4
42 Y
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“1g”
IX
INVENToR.
FREDERlcK c.,cARRo|.|_
’
BY
724ML@ „dan ,¢ c@
ATTORNEYS
United States Patent() Fice
Patented Àugi 13, 1963 Y
i
g
1
.
.
3,100,720
WElGHlNG SCALE
Frederick C. Carroll, Toledo, Ühio, assignor to Toledo
Scale Corporation, Toledo, Ohio, a corporation of Ühio
Filed Get. 4, 1961, Ser. No. 142,844
` 6 Claims.
(Cl. 177_----37)
IFIG. V .is `an elevational view of the postal rate chart
as seen looking toward the lett end of the chart Ias illus
trated «in FIG. IV;
FIG. VI is> an enlarged view, partly in section, of the
mounting means for the postal rate chart shown in FIG.
’
' This invention 'relates to weighing scales and «more
particularly to Weighing scales incorporating charts which
can be readily replaced by others without destroying the
IV;
FIG. VIII is tan end elevational view of a rnodiñed
One of the major items in the Post Office `Department
-speciiications -for parcel post weighing scales ‘is the re
quirement that the postal rate charts be replaceable
quickly in the event of :rate changes. The specifications
mounting means lfor the postal rate chart corresponding
to a view as seenv looking toward the right end of the
mounting means illustrated in fFIG. VI; .a-nd
require that ya postal employee unskilled .in scale me
zero corrections.
f
line >lX--IX of FIG. VIII.
'
Referring to the drawings, a parcel post weighing
scale 1 vincludes a housing 2 supported on feet 3 and
20 defining a window opening 4 closed by a magnifying
No prior 'weighing scale is known having a chant which
can :be readily replaced by another ywithout »destroying
‘
v
FIG. 1X is a horizontal section-al view taken Aalong the
chan-ics shall be able to substitute one rate chart vfor yan
other in .a weighing scale in one hou-r or less and that
such scale will then weigh correctly, at least .after minor
t
FIG. VII is -a horizontal sectional view taken `along the
line Vil-_Vil in tFIG. II;
seals of the scales.
the seal of the scale.
,
‘FIG. lV is .a detailed View of the cylindrical postal
rate chart shown in FIG. Il, part of the surface of the
chart being broken yaway to reveal interior structure;
lens 5 through which rotatable cylindrical weight and
postal rate charts 6 and '7 are viewed.
Charts 6 and 7
are rotatable `about a common `axis Ias one.
Articles
.
to be weighed are placed upon a platter S operatively
The objects of this invention are to improve weighing
connected to the weighing mechanism shown in FIG.
scales, to facilitate the replacement of charts in such 25 II. The scale 1 functions like any ordinary parcel post
scales, to provide for the replacements of chartsl in such
cylinder scale, i.e., the Weight of an article placed upon
scales without destroying the seals of such scales, to facili
the platter 8 is indicated by a stationary reading line 9
tate the replacement of charts in su-ch scales and at the
stretched adjacent the rotatable weight chart 6 and the
same time provide for retaining the seals of such scales, to
amount of postage needed to mail the article is indi
simplify the construction of such scales, to »facilitate the
cated by a stationary reading line lil stretched adjacent
mechanical Iadjustment of such scales .and .to provide an
the rotatable rate chart 7. The rate chart ’7, which is
improved parcel post cylinder scale.
One embodiment of this invention enabling the realizar
tion of'these objects is a cylinder Weighing scale having
two charts in contrast to the usual single chart, ie., a
a computing chart that computes the dollars and cents
amount of the postage needed to mail an article in accord
ance with the weight of the article and «the mailing zone,
is provided with eight columns identified by indicia V11
weight chart which remains in the scale `and »against
underneath the window opening 4 as “Local,” “Zone l
which the scale is sealed and a readily replaceable rate
and 2,” Zone 3,” “Zone 4,” “Zone 5,” “Zon-e 6,” “Zone
chart, i.e., a chart for indicating postalcharges in various
7„” and “Zone 8,” each columnV being divided into squares
zones, which can be `replaced by a postal employee un 4:0 12 each containing a black and a red figure (figures
skilled‘in lscale mechanics because its replacement does
not shown). The black figures are for surface mail
.
and the red tigures are for air mail. In operation, an V
In accordance with the above, one feature o-f this in
article to Ibe mailed is placed upon the platter `8 and one
ventionjre'sides in so mounting the rate chart in lthesCaIe
of the eight mailing Zone columns 11 is selected. The
that it can be readily replaced by .another in the event of 45 weight of the article is indicated on the w-eight chart 6
rate> changes. The substituted rate chart is readily po
at reading line @and the amount of postage needed to
sitioned in the scaleso that the scale will then wei-gh
mail the article is indicate-d yon the rate chart 7 in the
correctly, -at leastafterïminor zero corrections. `A man
selected zone column -11 at the reading line 10, t-he black
unskilled in scale mechanics can .replace they rate‘chart
or the red tigure in the chart square 12 at the reading
‘with -another in >thirty minutes. The weight chant, seal 50 line 1li being read depending on whether the surface or
ing yadjustment is peculiar to leach scale, the scale being
air mail rate is desired. The weighing scale insofar as
sealed .in at the factory» in. the usual way. Since ’the
_it has been described is like any `ordinary parcel post
weight chart is never removed, the scale stays sealed in.
cylinder scale except it bastwo charts 6 and 7 in contrast to
not destroy the seal of the scale. . `
The rate chart bal-ance adjustment ispeculiar to each
the usual single chart »having separate weight and rate
rate chart, the rate charts being balanced relative to 55
their taxes of rotation ,at `the factory and supplied to the
The force of gravity acting on a load placed upon the
field for replacement attr-andern in the two-chant scales.
platte-r3 is transmitted to a lever 121i (FÍG. Il) fulcrumed
on ball bearings in the base of the Weighing scale. A lever
The above .and other objects and features of this in
similar to the lever 13 lis shown 'and described in detail
vention will be :appreciated more -fully lfrom the follow
sections.
'
’
‘
Y
ing detailed description when read »with reference to the 60 in U.S. Patent No. 2,895,726 entitled “Ball Bearing Scale
accompanying drawings wherein:
'
rPivots,” and issued to L. S. Williamson JulyZl, 1959.
tFlG. I is yan elevational view of a- weighing scale
Also, lan operative interconnection for the platter 8 and
showing par-ts of cylindrical weight and postal rate charts
lever 13 is shown in such patent together with mechanism
needed for an operable weighing scale. .These load forces
behind
.a
window;
j
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` FIG. `Il is ‘a fragmentary, enlarged view of the weigh
acting on .the lever 11iv are transmitted to a load counter
ing scale` shown in FIG. I, part. of the housin-g being
broken -away to reveal interior mechanism’including the
balancing spning 14. The upper end of the spring- 14 >is
«connected through a clamp 1'5» to a threaded rod 16, the
threaded rod 16 extending through an oversize hole in the
clamp 15 and secu-red therein by means of a nut 17 (only
FIG.V ll;
_
`
j
.
v FIG. III is a detailed view of the cylindrical weight 70 one shown) one on either side of the clamp 15. When the
nuts 17 are loosened, the clamp 15 and, thus, the upper
chart shown in FIG. Il, part of the _surface of the chart
end of the sp'ring `1d can be shifted to the right or the
being broken away to Yreveal interior structure;
cylindrical weight and postal ratey chartsV illustrated in
3,100,720
left Yas viewed in FIGYII providing a one-half capacity
sealing> adjustment. The clamp 15 is shown and de
scribed in detail in U.S. patent application Ser. No.
618,050, filed October 24, 19‘56, now Patent No. 3,009,
523, in the’name off-L. S. Williams. The lower end of the
spring 14 is connected through a clamp 18, which is like
the upper clamp 1‘5, to the end of the lever 13, the clamp
18 being connected to the lever'13 »by means of a bolt 19,
extending through the lever and 'an oversize hole in the
clamp 18, and a nu-t 20. When the nut Ztl is loosened, the
clamp 118 and, thus, the lower end of the spring 14 can be
shifted to lthe right or the left as .viewed in FIG. Il pro
viding a span (zero to full) capacity sealing adjustment.
The upper vend of the rod 16 is attached to a tr-unnion
21, having horizontally extending pins ‘22, only one of
which is shown, which rest in V-shaped bearing surfaces
of a bifurcated portion 123i of a bell crank 24, the rod 16
being -rockable about the axes off the pins 22. The bell
.crank 24 is roc-kable about the axes of cone pointed screws
pinned by pins 52 tothe shaft 44 and carrying a thin indi
cia-bearing sheath or skin 53. The hubs 51 are attached
to the spiders '50 «by means of screws 54, washers 55 separ
ating the heads of the screws 541 from the spiders.V The
spiders 501 and the skin 5-3‘ form a cylindrical chart 'which
is like an ordina-ry cylindrical chart except for its small
size. Ordinary cylindrical charts have value and weight
indicia. In contrast, the chart 6 only bears weightindicia
including a ‘.‘zero” line 56.
The weighing scale is sealed in against the weight chart
6 in the usual way. The Weight chart 6 is never removed
from the scale. Accordingly, the weighing scale retainsV
its seal. The scale is sealed .in by placingvariouscapac
ity weights on the platter tl Vand making corresponding trial Y
15 and error adjustments until the scale weighs correctly at`
zero, lirst quarter, one-half, third quarter, and full capaci
ties. VThe zero capacity adjustment is made by turni-ng
ther adjustment screw 31 las above described. The span»
capacity adjustment (zero to fu1l)ï is made by. shifting
25‘vvhich1are threaded through the flat spaced sides 26 of a 20 the lower end of the spring 14 tothe right yor the left as
pilla-r 27 having spaced feet Z'Bßresting and secured to the
viewed in FIG. Il as above described. The half-capacity
scale base anddefinin'g an opening "29 in its face through
adjustment need not be made if the spring 14 is linear;
which‘lthe bifurcated bell crank portion 2.3` extends, the
if itis not, thehalf capacity adjustment is made by shift.
screws `25 engaging conical depressions in the bell crankV
ing the upper end of the spring 14 to the right or the left
and being held against turning by lock nuts Stil which are 25 yas viewed in FIG. II as `above described. The quarters
so adjustedV that the ‘bell »crank is free to rock yet is
(ñrst and.` third) capacity .adjustment'is made by shifting
mounted with a minimum of play. The bell crank 24 is
weights carried by one .of the spiders 50 of the. weight
rocked' by «turning an adjustment screw 31; threaded
Vchart 6. These weights 'are not shown, but identical
Vthrough a Iboss 32 on the pillar 27 to move the screw
weights are shown in FIG. V and will be described.
toward or away from 1an upper arm 33" of the bell crank. 30 structurally and functionally hereinafter
in connection.
Force provided by the spring 14 always urges the upper
with the‘rate chart 7. The. above sealing adjustments are
bell crank arm 33 against the end of the adjustment screw
conventional. Every weighing scale must be sealed in in
311-- and the pins 22 against the bearing surfaces of the
one way or another. However, it is importantin con~
bifurcated bell crank portion 23. Rocking of the bell
nection »with the Weighing scale 1 .that the weight chart 6
crank Z4 by the turning'o-f theV adjustment screw 31 lowers 35 provides ameans ‘against which the scale is sealedin
or lifts the spring 14 providing a zero scale adjustment.
'Ihe »extension -of the spring 14, which is proportional
which means is never removed from the scale.
Accord
ingly, the rate chart 7 can Ibe. replaced by another in the
event of postal rate changes without destroying .the seal,A
to the load on the scale, permits thel spring supported end
of the lever 13 to drop a distance proportional to the load
of the scale.V
.
and this movement is transmitted through a rack 3d and 40
The rat-e chart 7 includes a pair of spiders S7 having
pinion 35 to rotate the cylindrical weight and rate charts
hubs SSpinnedv by pins 5910 an axle 60 in the form of
6 and 7 through equal increments of angle for equal incre-v
a tube and carrying a thin indicia-bearing sheath'l or. skin
ments of load upon »thescale The rack 34 is kept in en~
61. The hubs. 58 are attached to the spiders 57 by
gagement with the pinion 35 by means of aA guide roller
means of screws 62.> which extend through the spiders
and through washers 63; The spiders 57 and the »skin
Y
(notzshown) and the lower end of the rack is operatively
connected for rocking about two axes to the lever 13 by 45 61 form a cylindrical chart which is like the weight-chart
means of the mechanism shown in FIGS; II and VII. V'l‘he'
6 except that it is larger.> As described in connection
lower end of the rack 34 is pivotable about two axes that
with FIG. I, therate chart 7 is provided with eight col-rV
are perpendicular to each other. This compensates for
umns each divided into squares- 12> and each of the squares',V
arcuate and'lateral movements of ther lever so that the
12 contains »a black Iand a red postage figure (not shown),l "
rack and the pinion do notwbind. The pivotable connection
and also is pro-vided with a “zero” line 64. A collet 65,
for.r the rack'34 includes a yoke 36 rigidly attached to an
having an'extension 66 (FIG. VI) extending: through theV
integral. extension 37 of the lever 13 and a rectangular
`washer’ 63'and` the spider 5,7 and into the hub»V 58 and
frame 384 pivotally connected to the yoke by means of
'abutting lagainst an end ofthe axle 6tlg, isattached to the."
cone-pointed screws 39 provided with lock nuts 40‘ for.
55 spider 57 by means of the above screws 62. The free>
holding ‘them in adjusted positions. The axes of the screws
end_of the collet 65 is tapered and provided withtwo
39 are parallel to the fulcrum axis of the lever 13. The
slots 67 at right angles to each 'other 'and isfpartially.A l
rack 34~is provided with an extension 41 which is pivotally
threaded Ifor the reception of a’nut 68. An 4opening 69
connected to the frame 38» by means of cone-pointed
extends through the collet 65 'axially` aligned with the'
screws 42 provided with lock n-uts 43 for holding them in
axis of the tube axle 6l) `andreceives the free end of the'
adjusted positions. The axes of the cone-pointed screws 60 shaft dllyas shown in FIG. II, the shaft 44 extending ‘
39 are perpendicular to the axes of the cone-pointed screws
partially into `the ltube axle 6i). The nut 68 has an in
412. Hence, the rack 34 is pivotable about two axes that
terior portion shaped to engage the tapered end of the col
are perpendicular to yeach other.
`
The weight and rate’ charts 6 and 7 and the pinion 35
are mounted on a shaft flfi‘joumaled in V:ball bearings 45'
. Y carriedïby la boss 46 on the pillar 27 and in ball bearings
47 atop a post 48` erected from the scale base, ythe .left
let 65'as shownin FIG. .VI and is turned on
i the threaded ’
portion ¿of theA collet until the tapered and slotted collet'
end is compressed and firmly grasps the shaft
mounts the weight and the rate charts 6 tand 7 in axialÍ
alignment on the shaft 44 for movement together as one.
hand _end of the shaft 4e >as viewed in FIG. II extending
The rate chart 7 is balanced at the factory and supplied
from the bearings 47 in cantilever fashion.
to
the field for replacement at random inthe two-chart
70
The pinion 3'5 is pinned by a pin 49’ (FIG. III) to the
scales.
Balance, i.e., balance of the chart relative to its
shaft 44. The weight chart 6 is located on the shaft 44
axis of rotation, is accomplished by m-eans of four weights
closely adjacent the pinion 351 and it includes a pair >of
spiders 50, which yfrom the end lool( like the rate chart as
shown in _P_lG, V hereinafter described, having hubs 51
70 which are slidable at slots in the right hand spider 57`
as lviewed in FIG. 1V.
The slots are not shown, butV
>‘identical slots 71 are shown in the spider 5'7 shown in`
3,100,720 l
5
FIG. V. The Weights '7d also function as nuts which
receive screws 72 that extend through and are slidable in
the lslots vand which hold the weights 7 ti in their adjusted
positions, i.e., the positions found by Atrial and error in
which the rate chart 7 is balanced. Cylindrical charts
normally have such slots 7l and weights 70 for> making
such weight and rate charts are stationarily mounted and
the indicia thereon are pointed out by la movable load
responsive indicator hand. It is to be understood that the
above description is illustrative of this invention and that
various modifications thereof can be utilized without de
parting from its spirit and scope.
the quarters capacity sealing adjustment. The quarters
capacity `sealing adjustment is made .in the Weighing scale
yI-Iaving described the invention, I claim:
1. A weighing scale comprising, in combination, load
The weight chart sealing »adjustment is peculiar to each
scale, the weight chart 6 never being removed from the
separable from the ñrst part and readily replaceablel in
the scale, for indicating values computed in accordance
measuring means, indicating means having a portion op
I yas hereinbefore described by shifting Weights at slots in
Áone of the spiders Si) of the weight chart 6 which weights 10 eratively connected to «the load measuring means, the `in
dicating means including a first part for indicating load
and slots are not shown but which are identical to the
measured by the load measuring means and a second part,
weight 70v and slots 71, respectively.
The rate chart 15 with load measured by the load measuring means and pre
determined factors, and means for so adjusting the scale
balance adjustment is peculiar to each rate chart, each
relative to said first part that the scale weighs correctly.
chart being individually balanced. One feature of the
2. A weighing scale comprising, in combination, load
Weighing scale I resides in so mounting the rate chmt 6 in
measuring means, load and postal rate indicating means
the scale that it can be readily replaced by another in the
event of postal rate changes without destroying theV seal 20 having a portion operatively connected to the load meas
uring means, the load ‘and postal rate indicating means in
.of the scale. To replace the rate chart 7 with another,
cluding -a vfirst part for indicating load measured by the
the collet nut 68 is loosened allowing the slotted and
load measuring means and a second part, separable from
tapered end of the collet 65 to expand permitting the
the first part ‘and readily replaceable in the scale, for in
rate chart 7 to be withdrawn from the free end of the
shaft 44. Another rate chart 7, which is supplied bal 25 dicating postal charges for such load in various zones,
and means for so adjusting .the scale relative to said ñrst
anced, is provided with the collet nut 6d loosely threaded
scale so that the scale stays sealed in.
on the collet 65' and is slid onto the free end of the shaft
part that the scale weighs correctly. l
3. A cylinder weighing scale comprising, in combina
ti'on, load measuring means, rotatably mounted weight and
rate chart is properly positioned in the scale. vProper
positioning merely involves sliding the rate chart 7 side 30 postal rate cylindrical charts, means for so operatively con
necting the charts to the load measuring means that the
ways on the shaft 44 until the ycolumns of indicia on the
charts are rotated through equal increments of angle «for
chart coincide with :the proper zone indicia Il underneath
equal increments of iload upon the scale, the weight Vchart
the window opening 4 and rotating the rate chart 7 on the
indicating load measured by the load measuring means
shaft 44 until the rate chart zero line 64 coincides with
the reading line liti-the weightchart zero line 5o must 35 and the rate chart, which is separable from»> the weight
chart and readily replaceable in the scale, indicating postal
also coincide `with the reading line 9, ie., the zero lines
44 and the collet nut 6% is tightened securely after the
charges for such load in various zones, and means for
on the two charts must be aligned. Hence, the substi
so adjusting the scale relative to the weight chart that the
tuted rate chart is readily mounted and positioned in »the
scale
weighs correctly.
scale. After substituting one balanced rate chart 7 for
4. A cylinder weighing scale comprising, in combina
another, the Scale weighs correctly, at least after a minor 40
tion, load measuring means, a rotatably mounted shaft
zero correction made by turning the adjustment screw 3i.
having a cantilever end, means for so operatively connect
The weight and rate charts 6 and 7 must be mounted
ing the shaft to the 'load measuring means lthat the shaft
in axial alignment on the shaft '44. However, it is pos
is rotated through equal increments of angle for equal
sible that through some manufacturing enror the charts
are `not -square after both are mounted on the shaft 44. 45 increments of load upon the scale, a cylindrical weight
char-t mounted on the shaft to remain in the scale for in
A modified mounting means for the postal rate chart 7
dicating load measured by the load measuring means, and
is shown in FIGS. VIII »and IX which is so adjustable ‘that
a cylindrical postal rate chart mounted on the cantilever
the rate chart 7 can be made square with the weight'chart
shaft end for quick removal from the scale to indicate
, 6. Reference »numbers in FIGS. VIII and XI which are
similar to numbers in FIGS. LVII refer to parts alike 50 postal charges ‘for such load in various zones.
5. A cylinder weighing scale comprising, in combina
in .structure and in function.
tion, ioad measuring means, a rotatably mounted shaft
A hub l58a is pinned to an axle ‘60a by means of »a pin
having a cantilever end, means for so. operatively connect
, 59a and lis attached to a spider 57e by means of screws 73,
ing the shaft to the load measuring means that the shaft
a washer 63a separating -the heads of the screws -73 from
the spider 57m. A collet '65a is attached to the spider 57a 55 is rotated through equal increments of angle for equal in
crements of load upon the scale, -a cylindrical weight chart
and hub '53a by means of three screws 74 Iwhich extend
mounted on the shaft to remain in the scale for indica-ting
through the collet 65a, washer 63a, spider 57a andare i
load measured by the load measuring means, a cylindrical
received in threaded holes in the hub 58a. Thrce'screws
postal rate chart, and means including a collet attached to
75 extend through threaded holes inçthe collet 65a, extend
through holes in the Washer 63a and spider 57a, and bear 60 the postal rate chart for mounting-the postal rate chart
on .the cantilever shaft end to indicate postal charges for
against the bub- 53a. The screws 74 «and 75 form pull l
such load in various zones.
and push connections, respectively. After the collet 65a
6. A cylinder weighing scale comprising, in combina
is connected to .the shaft 44 l(FIG. II) by tightening a
tion, load measuring means, a rotatably mounted shaft hav
collet nut 68m, the rate chart is made square with the
weight chart by trial and terror adjustment of the pull and 65
l ing a cantilever end, means for so operatively connecting
Y push screws '714 »and 75 the adjustment of whichshi-fts'the
axis of the rate chart relative to the axis of the shaft 44.
It is not intended that this invention be restricted Ato
the shaft to the load measuring means that the shaft is ro
tated through equal increments of an-gleïfor equal incre
ments of Aload upon the scale, aA cylindrical chart, and
means for mounting the chart on the cantilever shaft end.
cylinder weighing scales. rIlhe generic idea of having two
charts in contrast to the usual single chart, ie., a weight 70
chart which remains in the scale land against which the »
References Cited in the ñle of this patent
scale -is sealed and a readily replaceable rate chart which
canbe replaced by a postal employee unskilled in scale
2,283,425
mechanics because its replacement does not destroy the
seal of the scale, may be embodied in a vfau scale wherein 75 `2,334,326
UNITED STATES PATENTS
Conners ______________ __ May l9‘, 1942
Hem ________________ __ Nov. 16, 1943
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