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Патент USA US2116430

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May 3, 1938.
R. H. GORDON
2,116,430
CONVEYING MECHANISM
Filed Dec. 14, 1934
6 Sheets-Sheet 1
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INVENTOR.
?oierz‘ ff. Gordan:
ATTORNEYS.
.Mgy 3, 1938.
R. H. GORDON
2,116,430
CONVEYING MEGHANI SM
Filed Dec. 14, 1934
6 Sheets-Sheet 2
I
A TTORNE Y6.
May 3, 1938.
R, H, GORDON
2,116,430
CONVEYING MECHANI SM
Filed D'ec. 14, 1934
6 Sheets-Sheet 3
INVENTOR.
Faker} ‘l1. Gordon.
ATTORNEYS.
May 3, ‘1938.
R. H. GORDON
2,116,430
commune MECHANISM
Filed Dec.v 14, 1934
6 Sheets-Sheet 4
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INVENTOR.
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A TTORNEYS,
Mayr3, 1938.
'
R. H. GORDON
CONVEYING
2,115,430
MECHANISM
Filed Dec. 14, 1934 -
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INVENTOR.
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BY
ATTORNEYS.
May 3, 1938.
2,1 16,430,
R. H. GORDON
CONVEYING MECHANISM
6 Sheets-Sheet 6
Filed Dec. 14, 1934
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INVENTOR.
?oh’rz’ /'/. Gordon.
BY
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ATTORNEYS.
2,_1"16,43o
Patented May3, 1938
' UNITED STATES ., PATENT‘: OFFICE‘
£110,430
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' ' CONVEYING MECHANISM
Robert H. Gordon, _Detroit, Mich.I ‘assignor to
Parker Bust Proof Company, a corporation of
Michigan
Application December 14, 1934, Serial No. 757,426
17 Claims. (CB 214-17)
This invention relates to conveying mechanism
and particularly, to that type thereof in which
articles to be transported and treated or worked
upon are adapted to travel at diiferent speeds
stage of the accompanying process or treatment. _
A still further objector the invention is to pro
vide a completely automatic conveying system of
this kind which ‘has diverse portions constructed
during different phases of movement thereof, the . and arranged and driven in- a predetermined
principal object being the provision‘ of a simple,
economical and e?icient mechanism of this type.
Although the mechanism provided by the pres—
ent invention is applicable for use wherever it is
10 _ desired to transfer and/or treat in any manner
any type of articles, for the purpose of simplicity
only reference hereafter will be made to its appli
cation to a rust proo?ng treatment only for arti
cles such as parts of automobiles, its application
15 for other uses such as plating, painting or the like
and for other types of articles, and the modi?ca
tion of‘ the illustrative embodiment sho_wn to
adapt it to such other uses and/ or articles, will be
apparent to those skilled in the art upon the dis
closure herein.
The invention pertains to the provision of means
particularly applicable for conveying articles to
be rust-proofed through the various stages of a
rust proo?ng process.
25
‘
One oi’ the main objects of the invention is to
provide a conveying system of this character
which may be adapted to carry articles through
Washing and rinsing devices preparatory to the
timed relation to move the articles in that manner
which is best suited for each particular stage of a
rust proo?ng process respectively.
Other objects of the invention are to provide '
mono-rail sections in those portions of a conveyor ‘ 10
system of this character which are not congested
and. where the articles travel a considerable dis
tance without being worked upon so as to lessen
the quantity of structural material required for
the construction .of the system; to provide mono 15
rail sections of this kind where single ?le move
ment of the articles permits access to be had to
all portions thereof for washing, rinsing, or other
purposes; to provide a double rail section at that
portion of a conveyor system which moves the 20
articles through a rust proo?ng or other tank so as
to facilitate multiple ?le movement of the articles
through the bath and. to thereby allow‘ a substan
tial reduction in the speed of travel of the con
veyor of such portions of the system without
necessitating the use of excessively long or large
capacity rust proo?ng tanks or the employment of
large quantities of liquid or solution at any one
rust proo?ng treatment in such a manner as to
30 expose substantially all the portions of ,such arti
cles to the washing and rinsing operations. _
time; to provide mono-rail conveyor sections for
carrying articles in single ?le to and from the 30
stations where they are treated with rust proo?ng
A further object of the invention is to provide
means in conveying apparatus of this kind which
automatically varies the manner of movement of
35 the articles after being subjected to one treatment
'to facilitate the treatment thereof in a tank of
solution; to provide rapid acting automatically
comparatively small capacity and relatively short
length so as to reduce the quantity of solution re
quired to be employed in the tank and exposed to
40 evaporation in the atmosphere.
‘
Another object of'the invention is to further
modify the manner of movement of‘the articles
automatically at the end of the rust proo?ng
treatment so as to reduce as far as possible the
4 Gl time of exposure of articles wet with rust proo?ng
solution to the atmosphere during transferring of
such articles from the rust proo?ng tank to a
?nal rinsing tank and to thereby guard against
drying of the solution on the articles.
A still further object of the invention is to pro
vide a completely automatic conveying system of
this kind which has diverse portions constructed
and arranged and driven in a predetermined timed
relation to move the articles to be treated in that
55 manner which is best suited for each particular
operable transfer means in the double rail section
of the conveying mechanism which is adapted to
remove a unit of a plurality of laterally aligned 35
articles from the rust proo?ng bath and deposit
the same in a ?nal rinsing tank before the rust
proo?ng solution on the surfaces of such articles
has an opportunity to dry and become hardened,
thereon; to provide means for automatically 40
transferring the articles from a single ?le rela
tionship on the mono-rail sections of the system
to a laterally aligned relationship on the double
rail section of the system; to provide similar auto
matic means of this kind for transferring the
articles from a laterally aligned relationship on
the double rail section to a single ?le relationship
on successive single rail sections of the system;
and to provide transfer means of this character
which is operable automatically by the movement 50
of the units of articles in their normal course of
travel.
'
The above being among the objects of the pres
ent invention; the same ‘consists in certain novel
features of construction and combination of parts
2
2,110,010
to be hereinafter described with reference to the
accompanying drawings and then claimed, having
the above and other objects in view.
An illustrative‘ embodiment of the invention is
shown in the accompanying drawings, wherein:
Fig. 1 is ,a diagrammatic illustrational plan
view of a system for conveying articles through
‘ the various stages of a rust proo?ng process;
Fig. 2 is a fragmentary, vertical, sectional view
10 taken on the line 2-3 of Fig. 1;
Fig. 31s a fragmentary, side elevational view
illustrating the mono-rail section of the convey
ing system as viewed from line 3—-3 of Fig. 1 and
showing an article holder by which a plurality of
articles may be supported and moved in a uni
tary fashion;
Fig. 4 is a transverse, vertical, sectional view
taken on the line 4-4 of Fig. 3;
Fig. 5 is a fragmentary, side elevational view
20 illustrating the double rail section of the convey
ing system, as viewed from line H of Fig. 1;
25
30
35
40
inlet opening 2. at its left end and an outlet
opening 33 at the right end of the unit, as viewed
in Figs. 1 and 2. Loading and unloading docks.
represented in the drawings by corresponding
legends, are also provided, at which articles to
be treated may be loaded upon the improved con
veying mechanism and removed therefrom after
the rust proo?ng operation.
The conveying apparatus includes a system of
rails having sequentially spaced mono-rail sec 10
tions generally designated by the numerals 3| and ii and an intermediate double rail section
generally designated by'the numeral 12. The
mono-rail section 30 extends in a loop shaped
course from the loading dock to the left end of 15
the double rail section 32, as viewedin Fig. 1,
and the mono-rail section II extends in a re
versely directed course from the right end of
the double rail section 32 past the unloading
dock and to the loading dock. It should be un
derstood that those extremities of the mono-rail
Fig. 6 is a fragmentary, transverse, vertical sec- - sections 3! and 32 which are located at the load
tional view taken on the line 5-5 of Fig. 5;
ing station are arranged in an aligned relation-v
Fig. 7 is a fragmentary, plan view of that por
ship so that there is no actual division therebe
tion of the conveying system which is located at tween but that the sections are designated differ
the junction of the mono-rail section of the sys
ently merely for the purpose of convenience of
tem and the front end of the double rail section description.
thereof, illustrating portions of the driving
The mono-rail sections include rails 33' of 1
mechanism of the system and more particularly shaped cross section, illustrated in Figs. 3 and 4,
showing the means for transferring units of ar
and the double rail section includes substantially
ticles from the mono-rail section to the double identical rails 34 arranged in spaced relationship,
rail sections of the system;
as illustrated in Figs. 5 and 6. These rails are
Fig. 8 is a fragmentary detail plan view of the supported in suspended relationship by spaced
automatic switch mechanism included in Fig. 7; vertical supports 35 or other suitable means which
Fig. 9 is a vertical, sectional view taken on are provided with laterally extending arms 38
the line 9-4 of Fig. 8;
to which the upper ?anges of the rails are ?xed.
Mounted on the vertical supports 35, directly
Fig. 10 is a vertical sectional view taken on the
above the laterally extending arms 36 are similar
line lli—l0 of Fig.7;
Fig. 11 is a vertical sectional view taken on the laterally extending arms 31 on which tracks 33 of
I-shaped cross section are mounted directly above
line il—_ll of Fig. 7;
Fig. 12 is a fragmentary top plan view of lift
the rails 33 of the mono-rail sections. The rails
ing apparatus for elevating units of articles from
one tank and lowering them into another;
Fig. 13 is a fragmentary side elevational view
45 of the structure shown in plan view in Fig. 12;
Fig. 14 is a transverse, sectional view taken on
the line l4—ll of Fig. 13;
Fig. 15 is a transverse, sectional view taken
on the line lS-IS of Fig. 2.
In Fig. 1 of the drawings is illustrated an em
50
bodiment of the improved conveying mechanism
in rust proofing apparatus which generally in
cludes a preliminary washing station 20 at which
articles to be rust proofed are subjected to an
55 initial washing operation either by manual or
by mechanical application thereto of water or
other suitable cleaning agents. Located in re
lated sequence with respect to the washing station
20 is a ?nal washing and rinsing station 2|
60 through which the articles are passed. The sta
tion 2| preferably includes a housing or casing
diagrammatically illustrated at 22 in which suit
able spray devices (not shown) are provided for
forcefully applying water sprays on the articles.
65 There are also diverse platforms 23 arranged
longitudinally of the casing 22 for accommodating
operators who may work upon the articles with
brushes or other suitable tools and devices. The
next successive unit of the rust proo?ng appara
70 tus includes a rust proo?ng solution tank 24, and
adjacent ?nal rinsing tank and an adjacent dry
ing chamber 26, best shown'in Fig. 2. The tanks
24 and 25 and the drying chamber 28 are arranged
in longitudinal alignment and preferably en
75 closed within a casing or housing 21 having an
33 and tracks 38 extend throughout substantially
the entire courses of such sections’. These tracks
are provided for supporting a travelling driving
member comprising a conveyor chain 39 having
spaced substantially horizontal links 40 on which
vertically extending chains supporting carriages
H are mounted.
Each carriage 4| includes a
bifurcated end portion 42 on the opposite side
arms of which arejournalled rollers 43, the rollers
being engaged between the ?anges of the tracks
38 and having rolling contact engagement with
the opposite sides of the lower ?ange 38' thereof
respectively.
'
Each carriage ll has an arm 44 extending
downwardly from the chain 39, on which spaced
cleats 45 are mounted.
Pivotaily mounted on the
outer end portions of the cleats l5 and disposed
therebetween are triangular shaped latch plates
46 having substantially vertical adjacent side
edges 41 and inclined outer side edges 48. Formed
on the upper edge portion of the latch plates 46
are transversely extending stops 49 which are en
gageable with the upper edges of the cleats 45
for preventing outward rotation of the latch 65
plates which are otherwise free to rotate in
wardly towards each other. These latch plates
are adapted to automatically couple with portions
of carriages 50 of article holders movably
mounted on the rails 33 of the mono-rail section. 70
Each carriage 50 includes a body portion ii on
which are mounted vertically up-standing brack
ets 52 having rollers 53 rotatably secured to their
upper extremities and engaged between the
?anges of the rail 33, as illustrated in Fig. 4. 75
2,116,480 ‘
3
the teeth of a bevel gear ‘Ill mounted on‘a ver
The rollers 53 are engaged in rolling contact
with the lower ?ange 54 of the rail 38. Extend tically up-standing shaft ‘H which is journalled
ing upwardly from the body portion 5| or each in suitable bearings provided on the frame struc
carriage 50 is a bracket 55 having a laterally
extending ?ange 56 which is adapted to be re
ceived between the vertical edges 41 of the latch
plates 46 in order to apply thedriving or trans
lating force of the chain 39 to the carriage 58.
Rotatably engaged in an aperture of a plate 51
10 secured to the lower extremity of the body por
tion 5! of each carriage 54 is a bolt 58 which is
attached to an elongated tubular bar 59 of the
article holder. The bar 59 is maintained in a
substantially horizontal position during its
15 movement throughout the mono-rail sections 3|
and 32 by the carriage 50 and by a similar car
riage, generally designated by the numeral 69,
which also includes a body portion 5! and up
standing brackets 52 on which rollers 53 are ro
20 tatably mounted. The carriages 69 are sub
_ stantially identical to the carriages 50 in all
' respects with the exception that they are not
provided with the up-standing arm 55 and in
wardly extending ?ange 56 for coupling the ar
25. ticle supporting unit with the driving chain.
Each carriage 50 is provided with an apertured
plate 51 in which a bolt 58 is rotatably engaged,
the latter being secured to the other end por
tion of the tube 59. If desired, the upper end
of the bolt 58 ‘may be'?xed to their re-‘
so portions
spective supporting plates 51 and provision may
be madeior pivotal movement of the lower end
portions of the bolt with respect to the tube 59.
The conveyor chains 39 are supported in the
35 manner illustrated in Figs.‘ 3 and '4 throughout
the entire course of movement of the article hold
ers as de?ned by‘ the mono-rail sections 38 and
3i. ‘At the left end of the double rail section 32,
as viewed in Figs..1 and 7, the supporting track
380i the driving chain 39 continues beyond the
40 end
of themono~rail section '39 in a U-shaped
course, as illustrated in Figs. 1 and 2, and finally
‘ extends substantially ‘parallel to the double rail
section 32 along the side of the housing 21 in
45
‘which. the rust proo?ng solution tank 24, rins
The sprocket wheel 12 propels the endless chain
39 throughout its course of movement as de?ned
by its supporting tracks 38, the slack in the chain
being taken up at I] in Fig. 1 by suitable appa 10
ratus (not shown).
The left end portions 13 of the rails 34 of the
double rail section 32 are disposed in converging
relationship as illustrated in Figs. 1 and 7 and
they terminate in close proximity to the adja 15
cent extremity of the rails 33 of the mono-rail
section 39. At the junction of the converging
end portions 13 of the rails of the double rail
section and one of the spaced extremities of the
rail 33 of the mono-rail section 39 is provided 20
a switching mechanism for transferring one car
riage of each article supporting unit to each of
the rails 34 of the double rail section respectively.
This switching mechanism includes a substan
tially straight rail portion 14 which is pivotally 25
attached at ‘I5 to the extremity of the rail 33 of
the mono-rail-section‘ 39. The rail portion 14 is
adapted to swing about the axis of the pivot 15
into alignment with‘each of the converging end
portions ‘I3 of the‘ double rail section.
‘
30
The switching ‘operation is automatically per
formed by apparatus including a pneumatic‘cyl
inder 16 having‘ a pistonv 11 therein to which is ‘
attached a piston rod 18.‘ Theouter end‘ of ‘the
piston rod 18 is pivotally secured at 19 to ‘the free 35
end portion of the pivotally mounted rail por- \
tion 14, as illustrated in Fig. 7.‘ Communicating
with the respectively opposite end portions of the
cylinder 13 are ?uid‘medium conduits 80 and 8|
which lead to and communicate with ‘a control 40
valve 82 mounted on one of the vconverging rail
end portions 13 of the ‘double rail section 32. The '
valve 82 is connected by a co‘nduit“83 with a suit
able source (not'shown)‘ of fluid ‘medium and it
is provided with a control member including 45
thus ‘forming a by-pass for the chain 39 to bring
angularly disposed lever arms“ ‘and 85. ‘The ‘
lever arm 84 extends into‘th‘elpath ‘of the up
it fr‘omthe discharging end of the mono-rail sec
tion‘ 39 to the receiving end of the mono-rail
of the article supporting unit by‘rwhich it is en
ing‘tank 25, and drying chamber 26 are disposed,
se‘ction3l. Adjacent the receiving end of the
mono-rail ~section 3|, the track 38 which sup
ports ‘the ‘driving chain 39 takes a 'reversely
curved course‘ so asto ‘bring it into tangential
relationship with respect toqthe discharge end
standing bracket 55‘ ‘of’ the leading ‘carriage 50
gaged after the leading carriage 50‘ has passed 50
over the “pivoted -_rail“ portion 14‘ and‘ onto the
end portion of the upper rail 34 of i the double rail
section‘ 32, it being~understood that‘ the switch
control apparatus normally retains the‘ pivoted
of the double rail section 32, as illustrated at IS
in Fig. 1‘.‘ The track 38 then follows the course of
rail portion 14 in~the full line position shown 55
in. Figs. 7 and‘ 8. When ‘the leading'carriage 50
the mono-grail section 3|‘ throughout a looped
path- l8 and extends leitwardly, as viewed in Fig.
1, insuper-imposed relation to the rail 33 of
84 ‘of the valve mechanism 82 ‘it rotates the‘ arm
84 and the associated'arin 85 in a‘clockwis'edirec
60 the mono-rail section‘ 3| untilit ultimately be
comes aligned with the vrail of the mono-rail
section’ 39“ at the loading dock.
‘
It should bewunderstuod that the chain 39 is
endless and that ity is continuously, driven dur
65
ture 68. Fixed on the lower end of the shaft ‘II
is a sprocket wheel ‘I2 over which the-driving
chain 39 of the conveying mechanism extends.
ing operation of the apparatus by suitable driv
ing mechanism which in'the form shown includes
an electric'motor‘ El and transmission mechanism
of the article supporting ‘unit ‘engages the arm
tion as viewed in "Fig. 8 so‘ as-to‘bring ‘the arm 60
85 into a 'transverselyextendin‘g relationship
withrespect to‘the converging end portion 13 of
the lower rail‘ 34*o‘f the ' double rail section, as
viewed in Fig: 7,-’and simultaneously~ permits ‘the
escape of’ the ?uid medium from the righthand 65
end of the cylinder '16 a'n‘d‘a‘lso admits'?u‘id
medium to the left end of thecylinde‘r, thereby
mechanism v62, includes‘ a shaft 63 on which ‘a
projecting the piston ‘l1 ‘and'its'ro‘d v‘Hi-'1 rightward‘
ly, as viewed
8,1's6 as‘_"to rotate‘ the‘ piv
otally mounted 'r‘ailfport‘ion “114v fin“ a ‘clockwise 'dil
connected by a' chain 65with'aSD1fQcket‘ ‘wheel 66
rection. ' Thisv movement or‘ therailivportion‘ ‘l4
52,. both shown, in; Fig. 7'. “The transmission
sprocket wheel 84 is‘ mounted and ‘operatively
70
brings. it‘ into alignment‘with ‘the: end portion‘of
the'lower‘rail (if'pf‘fthekdouble‘r li‘sect‘ion‘ as‘ill
transmission 52 ‘are supported.‘ Fixed on the lustrated in‘dotted l'inesf’in Fig; "I; This clockwise
15 Qshaft__,6‘l“is“'a bevel gear 59 which is meshed‘ with movement) of Jthe“ piiqtallv mounted mil ‘,bortibn 75
b: "ashaft ‘s1 ‘which. extends-‘transversely of the
‘irame‘structure 58 ‘by‘which the motor. GI and
4
2,116,480
14 occurs after the leading carriage 50 of the
article support has been engaged upon the end
portion of the upper rail 34 and before the trail
ing carriage 60 has reached the end of the piv
otally mounted rail portion ‘I3 and, therefore, as
the article holder is propelled along by the con
veyor chain._the carriage 50 is disposed on one
rail of the double rail section 32 and the carriage
' 33 is disposed on the other rail thereof. During
inclined upwardly to a maximum elevation sub
stantially directly above the right extremity of
the rinsing tank 25 and then downwardly to with
in close proximity of- the outlet 29 of the casing
21.
After the propelling members 86 part con
tact with the carriages of the article holder, the
latter is moved throughout its entire remaining
length of the double rail section 32, with the ex
movement of the carriage 60 past the valve 32, ception of that portion thereof ‘provided by the
the lower arm 35 of the latter is engaged and vertically movable length of rails 94, by a pair
returned to its normal full line position shown in of endless chains 95 supported on suitable tracks
Fig. 8. This operation of the control of the valve 36 and extending around sprocket wheels 91
33 causes the pivotally mounted rail portion ‘I4 to which together with the tracks 96 are so con
15 be restored to its normal position shown in full structed and arranged as to cause one side of 15
lines in Fig. 8, where it remains until the next each endless chain to follow the course of the
successive article holder reaches the junction of
the mono-rail section 33 and the double rail
double rail section 32, and the other side of each
chain to return from one right end of the double
section 32, whereupon the foregoing cycle of op
eration again takes place.
rail section 32 to-the' left end thereof.
After the carriages I3 and 33 of the article hold
er have been disposed upon their respective tracks
of the double rail section 32, the path of the chain
3! begins to depart from the course of the rails
of the double rail section, causing the ?ange 33
‘of the bracket 55 of the leading carriage ill to be
,withdrawn from between the latch plates 36.
The article holder is then temporarily propelled
along the rails of the double rail section 32 by
vane-like members 33 which are rotated about
substantially vertical'axes' in timed relation to
the movement of the conveyor chain 3!. ‘Each
vane-like propelling member 36 is ?xed to a
vertically extending shaft 31 which is journalled
in suitable bearings carried by the frame struc
ture 33 and which is provided with a bevel gear
33 that is meshed with the teeth of a bevel gear
I! mounted on a shaft 33 extending transversely
of the length of the double rail section 32. The
shaft 33 is also journalled in suitable bearings and
it is provided with a sprocket gear II which is op
eratively connected by a sprocket chain 92 with a
sprocket gear 33 mounted on the shaft 31. As the
vane-like propelling members 33 are turned
about the axes of their shaft 31, each one thereof
engages one of the carriages of the article sup
porting unit so as to move the latter to the right,
as viewed in Figs. 1, 7 and 11.
The double rail section 32 has an upwardly in
clined intermediate portion I 3 and an adjacent
downwardly inclined portion i5 by means of
which the article holders and the articles sup
ported thereon are lifted to a sufficiently high ele
vation to clear the left end of the rust proo?ng
tank 24 and allow the articles to be deposited
therein, the maximum elevation of the inclined
portions II and it of the double rail sections be
ing located substantially directly above the left
edge portion of the rust proo?ng solution tank.
The double rail section 32 then continues substan
tially horizontally‘ from the lower extremity of
the downwardly inclined portion i5 thereof to a
location substantially adjacent the right ex
tremity of the rust proofing tank, or slightly in
advance of the latter.
Vertically ‘movable lengths of rails 34 are dis
posed in alignment with the rails of the double
‘rail section 32 and located directly above the
adjacent end portions of the rust proo?ng solu
70 tiontank“ andtherinsingtankZS.
These
vertically movable lengths -of rails 33 are sup
ported by lifting apparatus to be hereinafter
more fully described. Extending to the right,
as viewed in Fig. 2, from the vertically movable
lmgthsofrails3l.thedoublerailsection32is
_ '
The conveyor chains 95 and associated sup 20
porting tracks 36 and sprocket wheels 31 are
located on each side of the double rail section 32
in outwardly spaced relation to the rails thereof
respectively, as illustrated in Figs. 1 and 7. Each
sprocket wheel 31 is ?xed on a shaft 93 journalled 25
in suitable bearings carried by the frame struc~
ture 63 of the apparatus. Mounted on each shaft '
33 is a sprocket gear 39 which is operatively con
nected by a chain I00 to a sprocket gear ilil
mounted on the transversely extending shaft 30
which, as previously set forth, is driven by the
sprocket gears 33 and Si and interconnecting
chain 32.
The conveyor driving chains 95 are spaced
apart sufficiently to accommodate the reception
of the respectively opposite end portions of the
bars 53 between alternate links thereof which
have outwardly extending side plates I02 forv
providing spaced recesses for the reception of the
end portions of the bars 33. The links of the
chains 35 are provided with rollers 35' which are
disposed in rolling contact engagement with the
tracks 33.
The vane-like propelling elements 33 which
move the article holders from the converging end
portions 13 of the tracks of the double rail sec
tion 32 are operated in timed relation to the con
veyor driving chains 33 through the medium
of the shaft 33 and they position the article
holders substantially directly over the left hand
extremity of the path of the conveyor driving
chain 33 in position to be picked up by the latter
chains and moved to the right, as viewed in Figs.
'7 and 11, and up the inclined adjacent portion
I 6 of the double rail section 32. The articles, il 55
lustrated at H in Fig. 2, carried by the article
holders are in this way lifted over the left end
wall of the rust proo?ng solution tank 23 and
lowered thereinto as the conveyor driving chains
35 carry the article holders downwardly along
the next adjacent portions ll of the double rail
section 32. The chains 85 move the article hold
ers to the right over the horizontal. portion of
the double rail section until they approach the
right end portion of the rust proo?ng solution 65
tank 24. At this location, the chains 35 move the
article holders onto the vertically movable
lengths of rails 34 by which they are lifted by
suitable elevating mechanism to remove the arti
cles thereon vertically from the tank.
70
The elevating mechanism for lifting the article
holders vertically, illustrated in Figs. 12, 13 and
14, include a stationary mainframe structure
having rectangularly spaced upright posts I33
and connecting horizontal beams I I4 and this 75
5
2,110,480
structure is preferably con?ned in a housing
I05, shown in Fig. 2. Vertically movabiy mount
ed. within the frame structure formed by the
vertical posts I00 and horizontal beams I04 is a
rectangular frame I05 on which the length of
rails 04 ‘are rigidly ?xed. The frame I00 is con
and lengths of rails 04 carried thereby, upwardly.
The free ends of the chains IIO are each pro
vided with a weight I00, by which the chain
is maintained under tension. The control arm
I 21 of the switch I20 is returned to its normal
position by a spring (not shown) after the con
?ned to movement in a vertical course by spaced
tacting article holder moves out of engagement
vertically extending guide members I01, which
therewith, but the valve mechanism remains in
are ?xed to the horizontal beams. I04 of respec
its aforesaid condition until altered in the man
10 tively opposite sides of the main frame structure
and located substantially midway between the
vertical posts I00 thereof, as illustrated in Fig.
14. Each guide member includes a pair of angle
bars, having inwardly extending ?anges which
15 are received in a channel of an elongated bracket
I08 carried by the frame I00, as shown in Fig. 12.
Fixed to the opposite sides of the frame I00,
adjacent the guide members I01, are trusses I00
ner hereinafter set forth.
‘
10
During upward and downward movement of
the article holders by the elevating mechanism,
the ends of the tubular bar 00 are engaged be
tween pairs of guide bars III and I02 respec
tively. The pairs of guide bars III are mounted 15
on the main frame structure of the elevating
mechanism and the space between their lower
end portions is so located as to accommodate up
ward movement of the bar 00 when the switch
I20 is closed. The upper .end portions of the 20
guide bars IOI are inclined slightly in the di
rection of movement of the article holders over
disposed substantially parallel to the lengths of the double rail section 02 so as to shift the arti
rails 04. The chains IIO extend laterally of the cle holders on the lengths of rails 04 somewhat
in the direction of their desired travel and to 25
25 double rail section 02 and downwardly over the
bring the end portions of the bar 00 into driv
sprocket gears IIO which are ?xed on respective
ing engagement with conveyor driving chains I00
ly opposite ends of a shaft II4 journalled in suit
mounted on the main frame structure of the ele
able bearings carried by the main frame struc
ture. Mounted on the shaft “4, intermediate vator mechanism substantially at the upper ele
30 the end thereof, is a pinion II5 which is meshed vation of the vertical path of movement of the 30
with the teeth N0 of a rack II1 carried by a lengths of rails 04.
Each chain I00 is endless and is disposed
piston rod H0. The piston rod IIO has a piston '
II9 thereon slidably mounted in'a pneumatic around sprocket gears I04 and I00. The sprocket
to each of which is secured a chain H0. The
20 chains I I0 extend over sprocket gears III mount
ed on a shaft II2 which is journalled in suitable
bearings carried by the main frame structure and
cylinder I20, which is preferably located ‘adja
35 cent one side of the double rail section 02.
The respectively opposite ends of the pneu
matic cylinder I20 are connected by conduits I2I,
I22 and valve mechanism I20 with a source of
?uid pressure (not shown) by a conduit I24, by
40 means of which the piston IIO, piston rod H0
and rack I I1 are reciprocated in a predetermined
manner for the purpose of raising and lowering
the frame I00 and the lengths of rails 04 carried
thereby.
45
shaft I00 having one end portion which pro 35
trudes beyond the side of the double rail section
on which is mounted a sprocket gear I01. The
sprocket gear I01 may be operatively connected
by a chain I00 with any desired prime mover or
it may be driven by the driving mechanism of 40
the conveyor system in the manner illustrated
in Fig. 2, wherein the chain I00 passes around
the sprocket gear I00, which is ?xed to a shaft
' I0 journalled on the frame structure and pro
'
The operation of the cylinder I20 and its pis
ton IIO of the structure associated therewith is
automatically controlled by apparatus which is
responsive to movement of the article holders so
as to individually lift each successive article
50 holder as the latter is disposed upon the verti
cally movable lengths of rails 04 by the con
veyor driving chain 05.
gears I04 are ?xed on a transversely extending
This apparatus in
cludes a relay I25 mounted on the valve I20
and electrically connected with a switch I20 lo-,
55 cated on or in advance of one of the horizontal
beams I04 of the frame structure of .the housing
21, as illustrated in Fig. 2. The switch I20 has
a downwardly extending control arm I21 pro
vided with a laterally extending ?nger I20 which
vided with a sprocket gear I2 that is so construct
ed and arranged as to be driven by one of the
conveyor driving chains 00 of the double rail
section 02. The sprocket gears I00 are carried
by separate idler shafts I40, which are jour
nalled in suitable bearings carried by the main 50
frame structure of the elevator mechanism. ' Re
gardless of the source of power applied to the
conveyor chains I00, they are preferably driven
at a relatively high rate of speed so as to rapidly
move the article holders to the right, as viewed 55
in Fig. 13, and both the upward and downward
movements of the elevating apparatus are rapid
so as to reduce, as far as possible, the period of
50 of the article holders. When the control arm
I21 is actuated by engagement with an article
time during which the articles are exposed to
the atmosphere while they are being transferred 60
from the rust proo?ng solution tank 24 to the
?nal rinsing‘ tank 25. This precaution is taken
to prevent drying and hardening of the rust
holder, the valve mechanism I20 is operated,
proo?ng solution on the article.
60 projects into the path of travel of the brackets
55 mounted on the side of the leading carriages
65 through the relay I25, to admit air to the lower
I,
As the article holders are moved to the right,
as viewed in Figs. 12 and 10, by the chains I00,
end of the cylinder I20, and the track sections
04 and the holder thereon is rapidly lifted ver
the bracket 05 of the leading carriage 00 thereof,
tieally by the elevating mechanism.
engages a control arm I“ of an electric switch
The air
that is admitted to cylinder I20 forces the piston
IIO, piston rod H0 and rack II1 upwardly so
as to rotate the shaft “4 and sprocket gears
I I0 thereon in a clockwise direction, as viewed in
Fig. 14. This rotation of the sprocket gears IIO
moves the chain IIO to the ‘right, as viewed in
75 Fig. 14, thereby pulling the elevator. frame I00
I42 which is also electrically connected with the
relay I25 of the pneumatic control valve I20. 70
The switch I42 is so constructed and arranged
as to close its circuit when the ends of one of
the tubular bars 00 of the article holder are in ‘
registration with the space between the diverg
ing end portions of the guide bars I02, so as to 75
' 6
2,110,4ao
return the pneumatic valve I23, through the me
dium of the relay I25, to its previous position
and to Jcondition it to admit fluid pressure to
the upper end' portion of the cylinder I20 and to
thereby force the piston Ill, piston rod H3 and
rack Ill downwardly, as viewed in Fig. 14. This
movement of the rack I ll causes the chain ill
to be moved to the left. as viewed in Fig. 14,
ment of the article holder throughout its course
and which is substantially identical to the corre
sponding apparatus shown in Fig. 8.
The conveyor driving chain 33 then moves the
article holder throughout the remaining portion
of the mono-rail section 3|, past the unloading
dock, where the treated articles are removed by
attendants. Then the unloaded, article holders
thereby permitting the frame IIS of the elevator are moved along their course by the chain 3! un
10 and lengths of rails 0| carried thereby, as well
til they reach the loading dock, at which location 10
as the article holders, to be lowered. The down- " attendants place thereon other articles to be
ward movement of the article holders is guid
ed by the guide bars I32 which are located rela
tively close together, so as to hold the bar 53
15 in substantially accurate transverse relationship
with respect to the movement of the main con
veyor driving chains 35 of the double rail sec
tion 32.
' ~
When the article holder reaches its lowermost
20 position it is deposited on the conveyor driving
chains 95 between the upstanding side plates
I02 of alternate links thereof, and these con
veyor chains then move the article holders
through the rinse tank 25 and then upwardly
25 over the last inclined portion of the double rail
section 32, so as to remove the articles carried
by the holders from the rinsing tank 25. The
conveyor driving chains 98 then move the arti
cle holders and the articles thereon downwardly
30 over the ?nal right hand downwardly‘inclined
portion of the double rail section 32 and through
‘ the drying chamber 38 which is heated by burn~
ers M3 to remove the rinse water carried by the
articles.
When the article holder reaches-a position over
the extreme right hand sprocket gear 91 of the
main double rail conveyor driving chain 95, it is
disconnected from the driving chain and_moved
downwardly under its own weight until it is en—
40 gaged by a yieldable stop I“ shown in Figs. 2
and 15, which is pivotally mounted on the upper
wall of the discharge end of the housing 21 and
yieldably held against counter-clockwise rota
tion, as viewed in Fig. 2, by coil springs I45, each
45 attached at one end to the housing 21 and at its
other end to the pivotally mounted stop. The
stop I“ includes a pair of downwardly extending
arms I46, each located adjacent one of the outer
sides of the right end portion of the rails of the
50 double rail section 32.
These arms engage the
carriages of the article holder and retain the
same at rest until the ?ange 56 of the bracket 55
of the leading carriage 50 of the article holder is
again coupled with the conveyor driving chain 38
55 of the mono-rail sections 30 and 3| by engage
ment of the ?ange 56 between the“ pivotally
mounted latch plates 46 of one of the carriages
4i by which the chain 39 is supported from its
track 38.
When the leading carriage of the article hold
or is again coupled with the driving chain 39, it
is propelled thereby over a pivotally mounted rail
portion 14’ corresponding to the pivotally mount
ed rail portion 14, heretofore described. The
65 leading carriage 50 is, in this manner, engaged
upon the rail 33 of the mono-rail section 3|.
The
treated.
Throughout the foregoing description of the
construction and apparatus of the improved con
veying mechanism and rust proo?ng system, the
progress of only one article holder has been out
lined, but it should be understood that, as illus
trated in dotted lines in Fig. l, a plurality of such
article holders are arranged in relatively close
proximity on the conveying apparatus, so as to 20
enable the convenient handling of a vast number
of articles.
.
No manual movement of the article or article
holders is required throughout theentire course of
travel thereof, for all the changes in the manner 25
of movement of the article holders are brought
about automatically by control mechanism which
is responsive to movement of the articles at the
diverse locations at which these changes in the
manner of movement occur.
The articles are 30
conveyed in a single ?le relationship through
the preliminary washing station and through the
next successive washing and rinsing stations in
such an arrangement that enables them to be
conveniently worked upon. The article holders 35
are moved in a multiple ?le relationship through
the rust proo?ng solution tank by conveyor
driving chains which may be operated at a slower
rate of speed than the conveyor driving chain 39,
which delivers the article and article holders to 40
the rust proo?ng unit and carries the same away
from the latter, so as to subject the article to the
action of the rust proo?ng solution for a pre
determined length of time without requiring the
use of excessively long rust proo?ng solution
tanks and rinsing tanks, and without exposing a
relatively large surface of rust proo?ng solution
to the evaporating action of the atmosphere.
Removal of the articles from the rust proo?ng
solution tank and placement thereof in the rins 50
ing tank is rapidly accomplished in a relatively
short interval of time by the automatic elevating
and transferring mechanism, which, as hereto
fore set forth, is operated at a relatively higher
rate of speed than that of the main driving chains 55
‘of the double rail section 32 and the mono-rail
sections 3|! and 3!. The automatic operation of
the switching apparatus by which the article
holders are transferred to and from the double
rail section 32 and the rapid acting elevating and 60
transferring devices by which the articles are re
moved from the rust proo?ng tank and placed in
the rinsing tank predetermines the interval of
time required in which to accomplish these oper
ations.
65
Inasmuch as the time required in which to ac
pivotally mounted rail portion 14' is then rotated
complish a satisfactory ?nal rinsing operation
in a counter-clockwise direction, as viewed in
is dependent more or less directly upon the ex
Fig. l, to bring the free end thereof into regis
70 tration with the end portion of the rail of the
double rail section upon which the other carriage
60 of the article holder has been supported. This
operation is automatically accomplished by a
pneumatic cylinder 16' and associated control
mechanism, which is also responsive to move
tent to which the rust proo?ng solution has dried
upon the article during this transfer period, the 70
?xing of the transfer period renders it possible
for the length of the treatment of the articles in
the rinsing tank to be accurately predetermined.
The uniformity of the condition of the resulting
product greatly facilitates the ?nishing thereof 75
7
9,116,480
in any subsequent treatment to which it is sub-”"
jected, such as plating, painting or enameling
treatment.
Although but one speci?c embodiment of the
double rail section in transversely extending rela
tionship with respect to its direction of move
ment through said other station, and apparatus‘
for automatically transferring said article holder
invention has been described and illustrated‘ in - from one end of each rail section to the adja
cent end of the other including control mem
bers responsive to movement of said article
holder as the latter approaches the adjacent ex
detail, it will be apparent to those skilled in the
art that various modi?cations may be made
without departing from the scope of the appended
claims.
-
tremities of said rail sections and including driv
ing means intermediate adjacent ends of said 10
rail sections for propelling said article holder
-
What I claim is:
10
1. Apparatus for conveying articles throughout
a predetermined substantially closed circuit course
including an elongated support adapted to carry
a plurality of aligned articles, means for movably
supporting said support and con?ning the move
ment thereof to said predetermined course in
from one to the other thereof.
4. In apparatus for rust proo?ng articles in
tion and a doublerall section included in series
cluding a washing station and a spaced station
comprising a rust proo?ng solution tank; appa 15
ratus for conveying articles through a substan
tially closed circuit course and through said sta
tions including a system of rails having a mono
therein, ‘apparatus for automatically switching
rail section associated with said washing station
cluding a system of rails having a mono-rail sec
and a double rail section associated with said rust 20
proo?ng station, said mono and double rail sec
20 said article support from ‘said mono-rail section
to one end of said double rail section and from
the opposite end of said double rail section back to
said mono-rail section including control mecha
tions having their respectively opposite end por
tions associated with each other for completing
said course, an elongated article holder movably
nism operable by engagement with said article
mounted on said system of rails and adapted to 25
support a plurality of articles to be treated in
25 support during‘ movement thereof ‘toward and
away from the opposite ends of said double rail
section respectively, and apparatus for driving
longitudinal alignment thereon, said article hold
er being movable in the direction of itslength
said article support throughout said predeter
through said washing station while supported on
mined course including driving members associ
30 ated with said mono-rail section and said double
rail section respectively and including a driving
member at the junction of one end of said double
rail section and said mono-rail section for driv
ingly transferring said article supports from‘ said
mono-rail section to said double rail section.
said mono-rail section and being movable in a 30
direction transverse to its length through said
tank while supported on said double rail section,
and transfer means including propeller apparatus
for drivingly moving said article holders from said
mono-rail section to the adjacent end of said 35
double rail section and including means respon
2. Apparatus for conveying articles throughout
sive to movement of said article holder toward _
a predetermined substantially closed circuit course
40
including an elongated support’ adapted to carry
the adjacent extremities of said rail sections for
a plurality of aligned articles, means for movably
automatically switching said‘article holder from
supporting said support and confining the move
said mono—rail section to said double rail section 40
and’from the latter, back to said mono-rail sec
ment thereof to said predetermined course includ
ing a system of rails having an intermediate dou- '
with ends thereof, apparatus for automatically
nally extending relationship with respect to one
of said mono-rail sectionsto a transversely e‘x->
tending relationship‘ with respect to said double
rail section,>and apparatus for driving said ar
ticle support throughout ‘said predetermined
course including driving members'associated with
each of said rail sections respectively and a driv
ing member at'the junction of one end of said
double rail section and said mono-rail section for
transferring‘ said article support to said ‘double
‘
_
‘
,
' 3. In apparatus for treating articles including
spaced article treating ‘ stations; apparatus for
"
‘
'
mono-rail section and associated with said rust 50
proo?ng station, said mono-rail section‘ having an
endless continuously driven'_conveyor extending
along both portions thereof and by-passing said
double rail ‘section, an elongated article holder
movably mounted on said system of rails and 55
adapted to support-a plurality of articles to be
treated in‘longitudinal alignment thereon. said
article holder being movable in‘the direction of
its length through said washing ‘station while sup
ported on said mono-railisection and being‘m'ov 60
conveying articles through a‘substantially ‘closed
' able in a direction transverse to its length through
circuit course and through‘ said stations including
an elongated articlev holder adapted to support a
plurality of“ articles to be treated in‘longitu'dinal
said tank while supported on said double rail sec
65 alignment thereon, ‘a system of ‘rails including a
mono-railsection in related proximity to one‘ of
said stations and a double rail‘s‘ection in related
proximity to ;_ another ‘station, said double rail
section‘ being included in series betweén'e‘nd por
tions vof said mono-rail section, means for move
I ably supporting‘ said article holder _‘on"said v'i'nono-'
rail ‘section in lengthwise extending ‘relationship
75
'
a double rail section between portions of said .
rail section and back to a longitudinally extend
50 ing relationship with respect‘ to the other mono—
section.
"
comprising a rustproo?ng solution tank; appa 45
ratus for conveying articles through said stations
including‘ a system of rails ‘having av mono-rail
section associated with said ‘washing station and
45 switching, said article support from a longitudi
rail
tion.
5. In apparatus for rust proo?ng articles in—
cluding a' washing station and ‘a spaced station
ble rail section and mono-rail sections associated
tion, means forlmovi‘ng said article holder while
articles supported‘ thereon" are immersed in‘ said
tank, means for lifting said, article ‘holder on» 65
stantially vertically-Pout of said tank when it
reaches a predetermined position therein. and
means for propelling‘ said article‘holders‘whilein ,
said lifted position‘ ‘away’from saidtank. _
*6‘. Conveying ‘apparatusincludin‘g ‘a system of 70
rails'having aid‘jacent‘mond-jrail and‘ double ‘rail ‘ ‘
sections, an article holder‘ including longitudinally
with respect to its direction of movement through spaced supports ‘engageable‘ on said‘ rail sections,
one ‘of said stations',-said'means‘being adapted said double raiisection‘ having a‘p'ainof com
to mtvably?'supirort said‘ article'holder in‘ (said verging rail portions ‘adjacent said‘ mono-‘rail
75
8
“ sections and said mono-rail section having a
pivoted rail portion 'registerable with each of said
converging rail portions, apparatus for automati
cally controlling said pivoted rail portion having
a control member responsive to movement 0! said
article holder relative thereto and adapted to
move said pivoted rail portion from a registering
relationship with respect to one of said converg
ing rail portions to a registering relationship with
10 respect to other of said converging rail portions
after movement of each of the supports oi.’ said
article holder respectively beyond said pivoted rail
portion, and mechanism for propelling said article
holder including a driving‘ member associated
ll with each of said rail sections respectively and an
intermediate driving member at the Junction of
said rail sections for removing said article holder
from engagement with the driving member of one
of said rail sections and bringing the same into
engagement with the driving member 01' the other
rail section.
7. Conveying apparatus including a system of
rails having adjacent mono-rail and double rail
sections, an article holder including longitudinally
spaced supports engageable on said rail sections,
said double rail section having a pair of converg
ing rail portions adjacent said mono-rail sections
and said mono-rail section having a pivoted rail
portion registerable with each of said converging
rail portions, apparatus for automatically con
trolling said pivoted rail portion having a control
member responsive to movement of said article
holder relative thereto and adapted to move said
aligned with said ?rst mentioned rail sections.
an article holder movable on said rail sections,
‘mechanism for automatically elevating said in
termediate rail section when said article holder is
disposed thereon and located at the end oi one
oi.’ said receptacles, apparatus for actuating said
mechanism to automatically lower said inter
mediate rail section when-said article holder is
directly above the other receptacle, and an inter
mediate propelling member operable while said 10
intermediate rail section is elevated for bringing
said article over. the latter receptacle.
10. In apparatus for subjecting an article to
successive treatments including a pair of adja
cent receptacles, each having an open upper ex
tremity, apparatus for conveying articles through
15
said vreceptacles including a pair of spaced aligned
rail sections, each extending over one of said re
ceptacles respectively, an intermediate vertically
shiitable rail section disposed over the adjacent 20
end portions 0! said receptacles and normally
aligned ‘with said ?rst mentioned rail sections,
an article holder movable on said rail sections,
mechanism for automatically elevating said in
termediate rail section when said article holder
is disposed thereon and located at the end of one
of said receptacles, apparatus for actuating said
mechanism to automatically lower said inter
mediate rail section when said article holder is
directly above the other receptacle, an inter
mediate propelling member operable while said
intermediate rail section is elevated for bringing
said article over the latter receptacle, spaced pro
pelling members for moving said article holder
pivoted rail portion from a registering relation
ship with respect to one of said converging rail
portions to a registering relationship with respect
to the other oi said converging rail portions alter
movement 01’ each of the supports of said article
holder respectively beyond said pivoted rail por
tion, mechanism for propelling said article holder
including a driving member associated with each
01' said-rail sections respectively and an inter
mediate driving member at the junction 0! said
rail sections for removing said article holder from
engagement with the driving member of one of
move said article holders slowly through said
receptacles and at a faster rate during movement
thereof from a position above one receptacle to a
position above the other.
11. In rust proo?ng apparatim including a rust
said rail sections and bringing the same into
engagement with the driving member of the other
proo?ng solution tank and an adjacent rinsing
tank, apparatus for conveying articlm through
A rail section, and a system of operating members
saidtanksincludinga?xedrailsection extending
interconnecting said driving members for op
proo?ng solution tank and an adjacent rinsing
tank, apparatus for conveying articles through
over each of said tanks, a vertically movable in
termediate rail section extending over the adja
cent end portions of said tanks and aligned with
said ?rst mentioned rail sections, article holders
movable longitudinally oi’ said rail sections, and
said tanks including a ?xed rail section extend
ing over each of said tanks, a vertically movable
intermediate rail section extending over the ad
said intermediate rail sections when an article 55
holder is disposed thereon including a control
erating the latter in a predetermined relation.
8. In rust proo?ng apparatus including a rust
jacent end portions of said tanks and aligned with
said ?rst mentioned rail sections, an article
holder movable longitudinally oi’ said rail sections,
means located at the upper limit of movement of
said intermediate rail section for moving said
over said ?rst mentioned rail sections and
through the main portions 0! the lengths of said
receptacles, and‘ driving mechanism including
driving members associated with said propelling
means and said elevating mechanism, said mem
bers being so constructed and arranged as to
apparatus for automatically lifting and lowering
member remote from said rust proo?ng solution
tank and responsive to movement 0! an article
holder located rearwardly oi the article holder
disposed on said intermediate rail section for
lifting the latter and including a control member
article holder from a position directly above said
responsive to movement of an article holder on
rust proo?ng solution tank to aposition' directly
said intermediate rail section when the latter is
above said rinsing tank, and apparatus for auto
matically elevating said intermediate rail section
when said article holder is disposed thereon.
mediate rail section.
12. In rust proo?ng apparatus including a rust
' 9. In apparatus for subjecting an article‘ to
successive treatments including a pair of adjacent
receptacles, each having an open upper extremity,
70 apparatus for conveying articles thmughsaid re
ceptacles including a pair of spaced
rail
sections, each extending over one foi said re
ceptacles, respectively, an intermediate vertically
shiitable rail section disposed over the adjacent
76 end portions of said receptacle and normally
in its elevated position for lowering said inter
proo?ng solution tank and an adjacent rinsing
tank, apparatus for conveying articles through
said tanks including a ?xed rail section extending
over each oi’ said tanks, a vertically movable in~ 70
termediate rail section extending over the adja
cent end portions of said tanks and aligned with
said ?rst mentioned rail sections, article holders
movable longitudinally of said rail sections, and
apparatus for automatically lifting and lowering 75
I
2,116,480
said intermediate rail section when an article
holder is disposed thereon including lilting and
9
shlitable conveyor section disposed over said ex
tremity of said ‘receptacle for receiving articles
~ lowering control members respectively arranged _ delivered thereto by said ?rst conveyor section.
in sequence at a location rearwardly oi the rust , mechanism‘ for elevating and lowering said shift
proo?ng solutionvtank and operable by engage
ment with an article holder spaced rearwardly
from the holder disposed in said intermediate rail
,
section.
13. in rust proo?ng apparatus including a rust
solution tank and an adjacent rinsing
'10 proo?ng
tank, apparatus for conveying articles through
said tanks including a ?xed rail section extend
ing over each oi.’ said tanks, a vertically movable
' intermediate rail section extending over the ad
15 jacent end portions of said tanks and aligned with
said firstv mentioned rail sections, means located
at the upper limit of movement of said intermedi
ate rail section for moving said article holders
irom a position directly above one tank to a po
20 sition directly above the other, article holders
movable longitudinally of said rail sections, and
‘apparatus for automatically lifting and lowering
‘ said intermediate rail sections when an article
holder is disposed thereon including a control
t member remote from said rust proo?ng solution
tank ‘and responsive to movement of an article
holder located rearwardly of the article holder
disposed on said intermediate rail section for op
. crating said lifting and lowering apparatus to lift
30 said intermediate rail section and including a sec
ond control member responsive to movement, of
an article holder by said means for operating said
lifting and lowering apparatus to lower said in
termediate rail section when an article holder
. ‘ thereon is in a predetermined position.
14. Conveying apparatus including a ?xed rail
section, a vertically movable rail section aligned
with said ?xed rail section and movable between
upper and lower limits, a member movable lon
40 gitudinally of said rail sections, means for mov
ing said member along said ?xed rail section and
over a portion of said movable rail section when
.the latter is at its lower limit; means located in
proximity to the upper limit of said vertically
movable rail section for reflecting movement of
able conveyor section, mechanism located in prox
imity to said shiitable conveyor section for mov
ing articles onthe latter away from said extrem
ity of said receptacle when said shiitable con
veyor section is at its upper limit, and automatic
control means responsive to movement oi.’ an are 10
t-cle to a predetermined position on mid verti
cally shiftable conveyor section for actuating said
lifting and lowering mechanism to lift said arti
cle, said control means being responsive to subse»
quent movement of said article to a di?erent pre
determined position on said vertically shiitable
conveyor section for lowering said article.
16. In apparatus for subjecting an article to
treatment in a receptacle having an open extrem
ity, a ?xed conveyor section for moving articles 20
through said receptacle transversely of- said open
extremity toward an end wall thereof, a movable
conveyor section shiftable toward and away from
said open extremity for receiving articles deliv
ered thereto by said ?xed conveyor section and 25
extending over said end wall, mechanism ior au
tomatically moving said shiftable conveyor sec
tion toward and away from said open extremity
including control means operable when an article
is deposited in a predetermined position on said
shiftable conveyor section for moving said article
away from said open extremity, and a propelling
w
member operable while said shiftable conveyor
section is remote from said open extremity for
moving said article out of registration with said 35
receptacle, said mechanism including automatic
control means operable when saidarticle is dis
posed in a second predetermined position for mov
ing said shiftable conveyor section toward said
open extremity..
1'?- Conveying apparatus including a ?xed rail
section, a vertically movable rail section inter
posed between portions of said ?xed rail section
and movable between a lower position substan
tially aligned with said ?xed rail section and an 45
said member over only a portion of the length ' upper portion spaced therefrom, a member mov
thereof when said movable rail section is at said able longitudinally of said rail sections, means
for moving said member along said ?xed rail sec
upper limit-apparatus tor automatically elevat
ing said movable rail section when said member is ~ tion and along opposite end portions or said mov
disposed in predetermined position thereon, and able rail section when the latter is in its lower po
sition, means located in proximity to the upper
apparatus 101' automatically lowering said mov
portion oi! said movable rail section for moving
able rail section when said member is in a dif
said member along the intermediate portions of
ierent predetermined position thereon.
‘
15. In apparatus for subjecting an article to said movable rail section when the latter is in‘
' treatment in a receptacle having an open upper its upper position, and apparatus for reciprocat
extremity, a. conveyor section substantially ?xed ing said movable rail section intermittently be
in elevation ‘for moving articles throughv said re - tween said upper and lower positions.
ceptacie toward one extremity thee-coda vertically
ROBERT E. GORDON.
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