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Патент USA US2132612

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Oct. 11, 1938.
Filed Oct. 1, 1936
16 Sheets-Sheet l
- 54
Robert Fax/i557
1 /
Oct. 11, 1938.
' 2,132,612
Filed Oct. 1, 1936
16 Sheets-Sheet 2
Roman? Farms,
‘Oct. 11, 1938.
Filed Oct. 1, 19.36
16Sheets-Sheet 5
1 ii’oiwri?v Farms,
Oct; 11, 1938.
Filed Oct. 1, 1936
16 Sheets-Sheet 4
1716i 12;
> Oct. 11, 1938.
Filed 001;. 1, 1956
16 Sheets-Sheet 6
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Rob/art Furies,
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Oct. 11, 1938.
Filed Oct. 1, 1936
16 Sheets-Sheet 8
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Oct. 11, 1938.
Filed Oct. 1, 1936
- 16 Sheets-Sheet 9
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Oct. 11, 1938.
Filed Oct. 1, 1956
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Oct. 11, 1938.
Filed Oct_. 1, 1936
16 Sheets-Sheet ll
155 m
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' Hobart Farms,
Oct. 11, 1938.
Filed Oct. 1, 1956
l6 Sheets-Sheet 12
Robert Farms,
Oct. 11, 1938.
Filed Oct. '1, 1956
16 Sheets-Sheet l3
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Rah/5n? Furies,
Filed Oct. 1, 1956
l6 Sheets-Sheet 14_
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Oct. 11, 1938.
Filed 001:. l, 1956
l6 Sheets-Sheet 16
Rober? Farms,
’ 2,132,612
Patented Oct. 11, 1938
2,132,612, '
Timon ’
Robert‘ Faries,
St. Davids, Pa. 7
: ,. ' Application October 1, 1926, ; Serial , K631113502
(01. 2141-65)
20 Claims.
a portion‘ of the truck platform broken out and
shown‘ in longitudinal section.
‘flat platforms for transporting containers such
'_ Fig. ‘IV shows the front, elevation of the truck.
as are used in the shipment of freight inless than
Fig; V is .a fragmentary sectional view in plan , 5 '
taken as indicated by, the arrows V—-V in Figs.
j 5 carload lots by rail.
In connection with trucks of the type speci?
cally referred to, I aim to provide simple and re
II and III.
Fig‘VI is a view similar to Fig. V with certain '
,liable lifting mechanism whereby the trdckplat
‘,of- the parts in different positions.
form can be raised or lowered to the levels of
Fig. VII is a fragmentary longitudinal section
taken .asindicated by the arrows VII-VII in
loadingplatforms of different] heights .to enable
transfertof the containerspfrom the one to the
'Fig. I.
other without the aid of special lifting tackle
such as is ordinarily required.
jaslm’aieated' by the arrows III'-III in'Fig. I, with
This invention relates to trucks; and it. has
reference more particularly to motor trucks with
11 0
Fig. VIII is a fragmentary sectional view taken
as indicated bythe, arrows VIII--VIII in Figs.
,My invention is also directed toward the'provi-_ ,I, II, andVII. .
‘ . _'
Fig. IX is a fragmentary sectional view'taken
415 ,sion
of safety means, whereby, upon vertical
‘ movement. ,of the truck platform beyond pre
as indicated 'bythe-arrows IX-IX,>in Fig. I.
scribed limits with jack screw lifting, mechanism, _ Fig. X,‘ is a fragmentary sectional view‘taken
the jack screws are rendered inoperative for the
as indicated by the arrows X—-X in. Figs. I and V.
protection of the lifting mechanism against de
rangement or injury.
My invention is further concerned with the
provision of incorporated mechanism for'moving
» the containers between the truck and loading
platforms with ability to right the containers in
casethey should tend to. deviate from a straight
course of travel incident to being transferred to
and from the truck platform.
Another‘ object of my invention, is to provide
for the ‘actuation of the lifting and transfer
mechanisms aforesaid from a common power
and’ XII are views corresponding to
Fig. X with. certain of the parts, differently posi
a I
III is @Qd?t?i]. sectional View taken as
vindicated by the‘ arrows XIII-XIII in Fig. I,
showing one form of coupling means for connect- .2
ing the shipping container to the transfer mech-'
anism on the truck.
Fig. XIV is a detail view taken as indicated by
the arrows XIV-XIV in Fig. XIII.
m Fig. XV is_ a detail sectional view takenas in
dicated by the arrows XV-—XV in Fig. XIV.
source driven from the truck motor under man
. Fig. XVI is- a fragmentary view partly in plan
ual control.
Still another object of my invention is’to pro
vide for quick and easy coupling of the shipping
and partly in plan section showing an alternative
_ container with, as well as for its quick and easy
‘release from the transfer mechanism on’ the I .
I In addition to the foregoing, I aim to provide'in
form of coupling device.
M Fig. ‘XVII is a sectional view taken as indicated 35
bythe arrowsXVIL-XVII, in'Fig. XVI.
Fig. XVIII is a, fragmentary detail section
al- view taken as indicated by the ‘arrows
XVIII-XVIII in Fig. I showing the means for
a truck having the foregoing .attributes, quick ‘ securing the container against shifting on the
releasable means for securing the container truck during transit. ‘
» > ,
vagainst the possibility of shifting on the truck
platform during transit.
Other objects and attendant advantages will
appear from the following detailed description of
the "attached drawings, wherein Fig. I shows, in
45 .plan, a truck conveniently embodying my in
vention alongside a loading platform in readiness
to receive a shipping container from said plat,
.form, a portion of the truck platform being
50 broken out to’ expose important underlying de
tails which would otherwise be hidden. _
M Fig. II is a view, partly in side elevation and
partly in longitudinal section, taken as indicated
by thearrow's II-II in Fig. I.
_ Fig/III is aside elevation of a truck viewed
Fig. XIX is a view like Fig. XVIII with the
vparts differently positioned.
Fig. XX isaa view looking asindicated by the
arrows XX-XX‘in Fig. XIX with a portion of
the truck platform broken out and in section.
1 FignXXI is a view corresponding to Fig. I
showing an alternative form of my improved
Fig. XXII is a side elevation of the truck
viewed as indicated by the arrows XXII-—XXII
XXI with portions of the truck broken out
and in section.
, ~Fig. XXIII is a View showing the truck partly
in end elevation and partly in transverse section. 55
Fig. XXIV is a detail sectional View taken as
by brought to the levels of loading platforms of
indicated by the arrows Xi?'V—X§CV in Fig.
different heights.
Figs. XXV is a detail sectional View taken as
For the purpose of moving the truck platform
11 up and down about its pivotal connection with
the chassis frame I, there is provided a lifting
mechanism which includes a plurality of vertical
jack screws 18, see Figs. I and VIII. As shown,
indicated by the arrows XXV-XXV in Fig. XXI.
Fig. XXVI is a detail sectional view taken as
indicated by the arrows XXVI—XXVI in Fig.
the tops of the jack screws l8 are pivotally con
nected at l9 to the upper ends of shackles or
Fig. XXVII is a view partly in side elevation
10 and partly in longitudinal section of another al
ternative form of my improved truck.
pivoted links 20 whereof the lower ends are sim
ilarly connected at 2| to suspension brackets
Fig. XXVIII is a view like Fig. XVI of a modi
?ed coupling means.
Fig. XXIX is a sectional view taken as indie.
15 cated by the arrows XXIX-XECIX in Fig‘.
Figs. XXX and XXXI are views corresponding
to Figs. XXVIII and XXEX of another modi?ed
form of coupling means.
coupling means.
Figs. XXXII and XXIHII are views also like
Figs. XXVIII and XXI showing another type of
Fig. XXXIV is a view similar to Fig. XXXII
with certain of the parts differently positioned.
" Fig. XXXV is a fragmentary view looking as
indicated by the arrows'XXXV-JQiXV in Fig.
Fig. XXXVI is adetail sectional view taken as
indicated by the arrows XXXVI-XXXVI in Fig.
Fig. XXXVII is a fragmentary view partly in
plan and partly in section of another form of
coupling means.’
Fig. XXXVIII is a section taken as indicated
by the arrows XXXVIII—-XXXV1II in Fig.
Figs. XXXIX and XL are detail views’ like
Figs. XXXVII and XXXVIII of another form of
coupling means;
40 ' Fig. XLI is a detail section taken as indicated
by the arrows
ated in Figs.
reference ?rst
XLI—XLI in Fig. XL.
the form of my invention deline
I-XII and having more detailed
more particularly to Figs. I-IV of
‘these illustrations, T comprehensively designates
the truck, and P a raised loading platform to or
22 affixed to the bottom of the platform I‘! in line
' with the intermediate cross bars l2 of the latter.
Cooperating with the jack screws l8 are worm
wheel nuts23 (Figs. 1, V, and IX) within hous
ings 25 attached to the inner face of the side 15
rail'6 of the chassis frame I, said worm wheel
nuts being operable in unison by as many indi
vidual intermeshing worms 26 on a longitudinal
shaft 21 which is Journaled in bearings ‘28 af
forded by said housings 25. At the front of the
truck, the shaft 21 extends through a sleeve 29
into a housing 30 secured to the outer face of
the end rail 3! of the chassis frame I, see Figs. I,
V, and IX. The sleeve 29 is loose on the shaft
21 and formed at its outer end with a clutch face 25
33 which opposes an axially shiftable clutch collar
35 splined to said shaft, said collar having an
actuating lever 36 which is swingable about a
?xed pivot pin 31. A torsion spring 38. (Figs. V,
VI, and X) is in?uential upon the lever 36 to 30
normally retain the clutch collar 35 retracted
from the clutch face 33 of the sleeve 29. Se
cured to the inner end of the sleeve 29 is a bevel
gear pinion '39 which meshes with a similar
pinion 40 at one end of a transverse shaft 4|. 35
As shown, the shaft 4| lies crosswise of the front
of the chassis frame I with'its opposite end
extending into another housing 42 attached to
said frame. Within the housing 42 (Fig. V), the
shaft 4| carries a pair of spaced oppositely-dis 40
posed beveled pinions 43, 44 which are loose on
fsaid shaft and which mesh with a master bevel
_ gear 45 on a countershaft 46 within said housing.
By means of an ‘axially-shiftable clutch collar 41
on the shaft 4| operable 45
through a pivoted control handle 48 at the ‘ex
from which shipping containers such as the one 1 (Figs. IV and VII)
shown at S is to be taken, said container'being
mounted for sidewise mobility upon a pair of
50 ‘spaced caterpillar'chains C. As featured, the
truck T is of the semi-trailer type having its
chassis frame I supported with interposition of
leaf springs 2, by a wheel axle 3 at the rear end,
‘ and provided at its front
end with a swivel cou
55 pling projection 4 for connection to a suitable
“bogey” motor truck, not illustrated.
at intervals to the inner face of the side rail 5
of the chassis frame I' are upwardly reaching
terior of the housing 42, the bevel pinions 43 and
44 can be selectively coupled with said shaft.
Also aiiixed to the shaft 46 is a worm wheel 49
which is arranged to be driven by a worm 50 at 50
the lower end of a vertical shaft 5| (Fig. VIII)
within the housing 42, said shaft 5| extending
down through the bottom of said housing for
connection, by a flexible shaft 52, with the motor
of the “bogey” truck used with the trailer truck 55
of my invention. Medially pivoted to a lug 53. at
brackets 1_ (see Figs. I, II, and VII) with spaced
the bottom of the housing 42 is a lever 54 whereof
bearing bosses 8 supporting bushings 9. Engag
ing these bushings 9V in the intervals between the
handle 43 (Figs. V~VII), and whereof the other
the bottoms of the intermediate cross bars I2 of
a supplemental horizontal structuralv iron frame
tral notch 58. Journaled in a ?xed bracket 59
on the chassis frame I immediately adjacent the
housing 42 is a short vertical shaft 60 with a roll
bosses 8 are pivot lugs II which are secured to
I3 above the chassis frame I, immediately inward
ofthe side rail l5 of said supplemental frame.
Incorporated with the supplemental frame ' i3 is
a floor of concrete or the like with resultant
one end 55 engages an aperture 56 in the control
end has the form of a cam sector 51 with a cen
er arm 6| at its lower end to cooperate with the
cam sector 57 of the lever 54. To the top of the 65
shaft 60 is secured an arm 62, which, by means
formation of a ?ush topped platform I‘! on which , of a link rod 63, is coupled with a slide 64 con
70 the container S is sustained during transit as ?ned to longitudinal movement in a ?xed guide 66
.shown in Fig. IV. Due to being pivotally sup
adapted to the side rail 6 of the chassis frame I.
A tension spring 65 is in?uential upon thelink 70
ported along one of its side edges as just ex
plained, the truck’ platform H can be moved
‘either up or down as exempli?ed by the dot and
dash lines in Fig. IV, and its free side edge there
rod 63 to keep the roller of the arm 6| in opera
tive engagement with the cam end 51 of the lever
54. Pivoted to the outer end of the slide 64 is
a ?nger 61 with a hook end 68 for engaging the 75
19, 132,16 12
bottom of the housing 42 for
98 at, the
to longitudinal sliding movement,
I '36. Accordingly; when the'control handle_48 vand at its opposite end has a pivotal connection
is swung in one direction or the other to couple at 99 with the control handle 90. Due to this
the bevel pinion 4:3,, or the pinion 44 with the ‘arrangement, the control handle 90 must ?rst be
master bevel gear 45, the clutch collar35 is con
used to effect ‘withdrawal ofthe stop bolts 15
currently shifted into'engagementwith the clutch from‘ the struts 10 before the control handle 48'
face 33 of the sleeve 29 as shown inFig. W by can be used to initiate ‘operation of the jack ‘
,end of‘an arm 69 on the clutch-actuating lever
action of the cam lever 54 and the interposed con
nections just described, so that motion is com
.municated concurrently in one direction or the
other to the jack screws, I0 with; consequent
raising or lowering of the platform ll of the
In order to relieve the jack screws I8 of the
weight of the platform I1, and its load during
travel of the truck, means areprovided as fol
screws I8.
The locking member 19 thus con
stitutesa safety means to insure against derange 1-0
'.ment of the lifting mechanism or injury thereto.
- . I Adjustably secured to the strut ‘I0 nearest the
front of the truck, is a correspondingly shaped
cam piece I00 (Figs. IV, V, VI, X, XI) with
I02 equally spaced from a .15
. edge I notches
I0 I ,
similar medial edge notch I03. When the truck
platform is in its normal horizontal position,
. lows:
Suspended from the bottom of the truck ‘plat
vform I‘I near ‘its free longitudinal edge are arou
.20 ate members 10 of which the curvature has its
center in the pivot axis of said frame, see‘Figs.
vIV and VIII.’ As shown, these arcuatestruts ‘I0
are pivotally connected at their upper ends to
.lugs'II fastened to the cross bars I2 of the truck
platform I1 I for capacity to adapt themselves
to guides "I2 affixed to the outer :face of the side
rail I5 of the chassis frame ‘I. From Figs. III,
V, and VI, it will bev observed that the struts
‘III .are of channel cross sectional con?guration;
30 and bolted within hollows of vsaid struts are blocks
13 with lateral recesses 14 adapted to be engaged
"by stop bolts ‘15 when ‘the truck platform I1 is in
its normal horizontal position; As shown in
Fig. VIII, the stop bolts 15 are longitudinally
slotted at "I6 for passage of ‘a shaft ‘I1, and are
the medial notch I03 of the
cupied by aroller I05 on
clutch lever 36.‘ Somewhat
medial notch I03, the cam
cam piece I00 is oc
the arm. 69 of the
above and below its 2.0
piece I00 has later
ally projecting studs I06, I01 adapted to cooper
ate with the hook ?nger G‘I'. Immediately, as
the clutch lever 36 is swung to the position shown
‘in Fig. VI by manipulation of the control handle 525
48, the roller I05 is withdrawn from the notch
I03 of the cam piece I00 by means of the pivoted
hook ?nger '61 of the slide 64 with attendant
connection of the clutch 35. As the cam piece
I00 moves up or down in following the move
ments .of the, truck platform II, the ?nger 61
is swung about its pivotal connection with the
slide '64 in opposition to springs shown at I09
through engagement thereof with the stud I06
or 47116 stud I01 as the case may be,‘ with at
moreover vertically‘ open as at ‘IB-to clear ec
centrics 19 on‘ said shaft, which latteris jour
naled in ‘the guides". By turning the shaft 11
to actuate the eccentrics 19, it will :be evident
that the stop‘ bolts ‘I5 will be withdrawn from the
notches 14 in the blocks 13 on the struts 10 when
the truck platform 11 is to be raised or lowered
tendant, release of the clutch lever 36 to the
action of the torsion spring 38. As the movement
of the frame I3 continues, the roller I05 will
roll along'the edge segment ‘I I0 or the edge seg
ment ‘I II of the cam piece I00 with the clutch .40
collar 35 maintained in coupled engagement with
the sleeve 29 to keep the jack screws I8 in op
I-Iowever, if the platform I3 is raised
relative to its normal horizontal position.v Af
or lowered beyond the limits de?ned by the
?xed ‘to the shaft 11 within the housing 30 isa notches IOI, IOZ-in-the cam piece I00, the clutch
spur pinion ‘80 which meshes with a spur gear
collar 35 will be automatically retracted to in
III on a short'shaft 82 also‘ journaled within said active position by dropping of the roller I05 on
housing. ‘Meshing with a spur gear -83 .a?ixed
64 into one'of said notches, as exem
to the gear -BI is a 'gear sector 85 (Figs. IV, V, the slide
Fig. XII, with the hook member 61
and VIII) which is fulcrumed .on a ?xed bear ' swung aside
and its book vend 58 resting on the
ing '86 at the bottom of the housing 30 and‘ pro-, projection 69, and ‘the jack screws I8 idled as a
vided with a pendant arm 81. A link rod 88 con
consequence. Upon movement of the control
nects the sector arm ‘81 with the arm 89 of a handle 48 through its neutral position to reverse
‘control lever handle 90 which is swingable hori
the lifting mechanism, the slide 64 will be re
zontally about 'a fulcrum axis 9.I won the ?xed tracted by the spring '65 and permit the ?nger
I .60
bracket plate 59. As shown in Fig. V, the bracket
plate 59 ‘has a curved edge 92 concentric'with
the axis BI, and is formed with spaced notches
'93 and 94 for engagement'by a ‘manually releasable latch member 95 associated with the control
handle 90. Movement of the control handle 90
‘fromvthe position shown in Fig. V‘ to that shown
‘in Fig. VI, will, through the‘ intermediate con
nections just described, ‘be attended ‘by a partial
rotation of the shaft 11 and incidental‘with
‘drawal of the stop bolts 15 from the struts 10.
After this is accomplished, the ‘jack ‘screws I8
can be operated to raise or lower vthe ‘interme
diate frame I3 under control ofthe handle 48
in the manner already understood. vNormally,
‘the control handle 48. is locked .in :the vertical
"2710 or neutral position centrally‘of the 'notched guide
segment 95 with which its latch 96 cooperates,
‘as-shown in Figs'IV and V, ‘byimeans of a clev
its Ic'levise'd
‘ised “locking member '91. .91Near
‘engages 5a‘ fixed
‘end, the locking "member
‘G‘I'to resume its normal horizontal position with
its hook end '68 forward of the projection of the ‘
clutch lever 36 as in Fig. X.
For the purpose of transferring the shipping
container ‘between the truck and the loading
platform, I have provided mechanism including a
‘pair of transverse screw spindles H2 which lie in
the intervals between closely spaced pairs of aux
iliary cross bars "I I3 on the truck‘ platform I3.
‘The ends of the screw spindles II2 are journaled 65
in bearing blocks such as the one shown at H5
in Fig. VIII, set into the hollows of the .channel
.side rails I5, :IB of the truck platform frame. En
vgaging the screw ‘spindles H2 and held against
rotation in the guideways formed jointly by‘ the
auxiliary cross bars II3 of the truck platform l3
are nut followers IIB which afford loose pivotal
‘connections lél-‘lifor individually associated draft
bars‘ I I8 which may be of ‘the form detailed in
As shown, each .of these draft
bars II8 has'at one side of the pivot II1 a rela
tively long portion II9 provided with a tapered
end and a longitudinal series of apertures I20,
while the portion I2I at the other side of said
pivot is very much shorter and provided with but
a single aperture I22. A connecting rod I23
serves to keep the draft bars H8 in parallel rela
tion. The apertures in the draft bars II8 are
adapted for selective engagement with coupling
#11) pins I24 which are removable from clevis blocks
I25 set into access openings I26 at the sides' of
the shipping container S, below the container
bottom. From Fig. XIII it will be noted that the
slots of the clevis blocks I25 are beveled as at I21
and rounded as at I28 to facilitate entry of the
draft bars H8v and _to permit angular up and
down movement of said bars about their pivotal
connections III with the screw spindle followers
I I6. Respectively secured to the spindles I I2 im
mediately inward of the side rail I5 of the truck
platform frame are spur pinions I29 which mesh
with companion spur gears I36, on short parallel
shifts I 3I, within housings I32, attached to said
rails. Through miter gear couples shown at I33,
I34 and I35, I36 in Figs. I, II, and VIII, the short
shafts I3! (and hence the screw spindles II2) are
arranged to be driven respectively from aligned
longitudinal shafts I 31, I38 which are journaled
in the pivot bushings 9 of the brackets 1. The
miter pinion I34 is loose on the shaft I31 but can
be coupled therewith by means of a clutch I39
(Figs. II and VIII) having a control handle I40.
The bevel pinion I36 on the other hand, is ?xed
on the shaft I38 which latter can be coupled with
the shaft I31 by means of a clutch “I under
control of a handle I42. At the front of the
truck, a spur gear I43, on the shaft I 31 meshes
with a spur gear I45 on a shaft I46 which ex
tends into thehousing 42 (Figs. II and VII), and
40 which, within said housing carries a pair of
loosely mounted opposingljz-arranged bevel pin
ions I41, I48. A bevel gear I49 common to the
pinions I41, I48 is affixed with a worm wheel I50
to a counter shaft I5I also'within the housing
42, said worm wheel meshing with another worm
I52 on the vertical power shaft 5I hereinbefore
mentioned. The bevel pinions I41, I48 are selec
tively connectible to the shaft I46 for reverse
driving of the screw spindles II2 by means of an
50 axially shiftable clutch collar I53, which, as
shown in Figs. II, IV, VII, and VIII, is operable
by a control handle I55 accessible at the exterior
of the housing 42. As a result of this arrange
ment, the screw spindles II 2 ‘can be driven in
unison in either direction when the bevel pinion
I34 is coupled with the shaft I31 and the latter
with the shaft I38, or said spindles driven inde
pendently under control of the clutches I39, I4I.
When a shipping container is to be moved onto
60 the truck from the station platform, the draft
bars H8 are engaged with the clevis blocks I25
on said container as. shown in Figs. XIII-XV
and the screw spindles II2 set into motion in the
proper direction to shift the followers I I6. After
the followers II6 have traveled the length of the
screw spindles I I2, the coupling pins I24 are with
drawn from the clevis blocks I25 on the shipping
container. The screw spindles II 2 are thereupon
reversed to advance the followers II6 until the
70 apertures I22 in the short ends I2I of the draft
bars II 8 register with those in the clevis blocks
I25 on the container, and upon recoupling the
screw spindles are again operated as at ?rst to
bring said container into ?nal position on .the
truck platform. If during this loading operation,
it should be ‘necessary to right the container from
an angular path of travel, this may be readily
"effected through individual actuation of the screw
spindles II2 by the control means provided for
that purpose.
Shiftingof a container S from
the truck to the station platform can obviously
be effected by reversal of the above procedure.
At I 56 in Figs. I-IV, I have shown quick release
devices for securing the container S against
shifting on the truck during transit. As detailed 10
in Figs. XXVIII-XXX each such device I56
comprises a claw I51 which is adapted to engage
an aperture I58 in one end wall of the shipping
container, and which is pivotally connected at
I59 to thertop end of a vertical screw bolt I60 15
passing down through the ?anges of the cor
responding end rail of the truck platform I3.
A hand‘nut I6I confined to rotation by the lower
flange of the rail engages the threads at the
lower end of the screw bolt I60. Normally, the 20
claw I 51 occupies the retracted position shown
in dot and dash lines in Fig. XVIII so as to be
out of the way when the container is moved onto
or off the truck. After the container is in
position on the truck platform, the claw I51 is 25
first swung into the opening‘ I58 in the container
as shown in full lines in Fig. XVIII and there
after drawn downward to the position shown in
Fig. XIX into ?rm clamping engagement with
the lower edge of the opening I58 by manipula 30
tion of the hand nut I'6I; As shown in Fig. XX
the opening I58 is made quite wide to facilitate
registration with the claw I51.
In the alternate embodiment of my truck illus
trated in Figs. XXI-XXVI, the truck platform 35
I 3a is fulcrumed at its front end'to swing about
pivot pins 9a in bearings 8a afforded by up
wardly-reaching brackets 1a at the correspond
ing end of the chassis frame Ia. The lifting
mechanism for the platform I3a in this in
stance, includes a single central jack screw I8a 40
which engages a vertical sleeve 23a con?ned to
axial movement in the guide boss I6I of a hous
ing 25a immediately forward of the wheel axle
3a. The housing 25a is supported centrally of a
cross member I62 which is pivotally connected 45
by means of trunnions I63 at its ends, to bear
ing blocks I65 set into the channels of the chassis
frame side rails 5a, 6a.
To the‘ upper end of
the sleeve 23a is secured a cross arm I66 Where
of the ends are pivotally connected at I61 to 50
pendant bearings I68 on the‘truck platform I3a.
Accordingly, as the ‘platform I3a is raised or low
ered, the jack screw I8a can take various angular
positions to accommodate the movement of said
platform about its fulcrum connections 9a with 55
the chassis frame Ia. Extending into the side
of the housing 25a is a short shaft I69 with a
- bevel gear I10 at its inner end that meshes with
a bevel gear "I secured to the lower end of the
jack screw I8a and resting on a thrust ‘bearing 60
I12 in the bottom of said housing. By means
of a shaft section 21a with universal joints, the
short shaft I69 is connected with a short shaft
I10 that extends into a housing 30a attached
to the platform I3a at the frontend of the 65
truck. Looseon the shaft I10 within the hous
ing 30a is a pair of oppositely arranged bevel
pinions 43a, 44a, in mesh with a master gear
45a on a vertical shaft I1I.
Through a pair
of intermeshing spur gears I 12, I13 within the 70
housing 30a, the shaft I1I is arranged to be
driven from another vertical shaft 5Ia which is
coupled with av ?exible shaft 52a leading from
the motor of the “bogey”. truck. Splined to the
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