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Патент USA US3079015

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Feb. 26, 1963
W. ECKHARDT
3,079,006
DERRICK CONSTRUCTION
Filed Dec. 11, 1961
3 Sheets-Sheet 1
FIG‘. /
INVENTOR. '
.Feb. 26, 1963
w. E-CKHARDT
3,079,006
DERRICK CONSTRUCTION -
Filed Dec. 11, 1961
3 Sheets-Sheet 2
22/
43/
H6. 4
"
FIG. 5
Feb. 26, 1963
>
w. ECKHARDT
3,079,006
DERRICK CONSTRUCTION
Filed Dec. 11, 1961
3 Sheets-Sheet 3
INVENTOR.
A/dZ/ZA/Vé' ‘son/11w?‘
BY
v
United States Patent O?ice
3,079,006
Patented Feb. 26, 1963
ll
2
3,079,006
tain speci?c embodiments with reference to the accom
Wolfgang Eckhardt, Hamburg-Gross?ottbek, Germany,
FIG. 1 is a perspective view of a derrick construction
which embodies one form of my invention;
DERRICK CONSTRUQTIQN
assignor to H. C. Stulcken Sohn, Hamhurg-Steinwerder,
Germany
panying drawings, in which:
FIG. 2 is a front elevational view of a power-driven
Filed Dec. 11, 1961, Ser. No. 158,471
Claims priority, application Germany Dec. 13, 1960
18 Claims. (Cl. 212-3)
rotary capstan which forms part of the means for turning
the boom in the derrick construction of FIG. 1;
FIG. 2A is a view similar to FIG. 2, but shows certain
parts of the capstan in section and indicates an electric
The present invention relates to derricks in general, 10 cable;
and more particularly to a derrick construction which is
especially suited for use as a ship hoist.
FIG. 3 is a fragmentary side elevational view of a.
boom whose upper end portion coaxially supports a modi
An important object of the invention is to provide a
?ed capstan;
derrick construction wherein the boom may be topped in
FIG. 4 is a similar fragmentary side elevational view
vertical directions and/or swung in lateral directions 15 of a boom whose upper end portion supports a capstan
with the help of a single hanger winch.
having an axis which is perpendicular to and intersects the
Another object of the invention is to provide a derrick
axis of the boom;
'
construction of the just outlined characteristics wherein
FIG. 5 illustrates the structure of FIG. 4 in a position
the boom may be swung in lateral directions by means of
turned through 90 degrees about the axis of the boom;
a power-driven capstan whose energy requirements are 20
exceptionally low and which may be mounted directly
on the boom.
‘
A further object of the invention is to provide a derrick
construction which may be utilized for handling of ex
FIG. 6 is a fragmentary side elevational view of a boom
whose upper end portion supports a capstan having a
horizontal axis of rotation which is perpendicular to and
laterally o?'set from the longitudinal axis of the boom;
FIG. 7 illustrates the structure of FIG. 6 in a position
ceptionally heavy loads even though its energy require 25 turned through 90 degrees about the axis of the boom;
ments need not exceed the energy requirements of con
FIG. 8 is a fragmentary front elevational view of; a
ventional derricks.
boom and of a di?erently guided ?exible element which
An additional object of my invention is to provide a
forms part of the means for turning the boom;
derrick construction of the above outlined characteristics
FIG. 9 is a side elevational view of a different capstan
wherein a single ?exible motion transmitting means may 30 which comprises a sprocket for guiding and driving a
adjust the working inclination and the lateral movements
?exible element in the form of a chain; and
_
,
of the boom, and wherein a single mast is sufficient to
FIG. 10 is a transverse section through a capstan whose
properly support the boom.
drum is formed with concave peripheral grooves or seats
With the above objects in view, the invention resides
for the beads of a ?exible element which passes about and
in the provision of a derrick construction which comprises 35 engages with the drum.
a supporting means preferably including a mast which
Referring now in greater detail to the illustrated em
bodiments, and ?rst to FIG. 1, there is shown a derrick
distance above the ground, a boom or jib whose lower
construction which is assumed to be mounted on the
portion is connected to the mast or to another com—
deck 1 of a ship and which comprises supporting means
ponent of the supporting means at a level below the cross 40 including an upright mast 2 anchored in the deck 1 and
carries a cross tree or a like supporting structure at a
tree so that the boom may turn about a horizontal and/or
supporting a cross tree 3 at a point spaced from the deck.
a vertical pivot axis, and means for turning the boom
The lower end portion if a boom or jib 4 is turnably sup
about the two axes including a hanger winch, power
ported in a connecting means including a bracket 5 which
driven rotary capstan means secured to the upper end
is ?xed to the mast 1 at a point below the cross tree 3 and
portion of the boom, anchoring means provided on the 45 a so-called derrick socket 6 including a pivot pin 7 turn
cross tree at one side of the boom, guide means provided
able in the bracket 5 about a vertical axis. The socket
on the cross tree at the other side of the boom, and a
6 has a bifurcated upper portion which supports the lower
?exible element which has one of its end portions secured
end portion of the boom 4 in such a way that the boom
to the anchoring means and whose other end portion is
is turnable about the horizontal axis of a second pivot
50
anchored in the winch drum. The ?exible element on
pin 8. In other words, the connecting means 5, 6 supports
gages with the capstan and passes about the guide means
the boom 4 in such a way that the latter is selectively or
so that, when the winch is operated in order that its drum
simultaneously turnable about the vertical axis of the pin
may pay out or collect the ?exible element, the boom is
7 or about the horizontal axis of the pin 8 which latter
topped by turning about the horizontal pivot axis to ad
secures the lower end portion of the boom‘ to the bifur
just its working inclination and, when the capstan is 55 cated upper portion forming part of the socket 6. '
operated to travel along the ?exible element toward the
The upper end portion or head of the boom 4 carries
guide means or toward the anchoring means, the boom
a motor-driven rotary capstan 9 whose construction will
is swung about the vertical pivot axis.
be explained in connection with FIG. 2. This capstan
Certain other features of the invention reside in special
forms part of the means for turning the boom about the
mounting of the capstan at the upper end of the boom, in 60 connecting means 5, 6, and this turning means further
special construction of the capstan so that it may engage
with a ?exible element in the form of a rope, cable, chain
or beaded cord, in the provision of tackles which enable
comprises an anchoring member in the form of an eye
bolt 10 which is secured to one arm of the cross tree 3
at one side of the boom 4, a guide pulley 11 which is
the boom to lift very heavy loads, and in the provision
secured to the other arm of the cross tree 3 and is located
of special guide rolls which retain the ?exible element in 65 at the other side of the boom, a manually operable or
requisite position with respect to the capstan.
motor-driven hanger winch 12 which is mounted on the
The novel features which are considered as characteris
tic of the invention are set forth in particular in the ap
deck 1, and a ?exible element here shown as a cable or
rope 13 which has one of its ends anchored in the drum,
ended claims. The invention itself, however, both as to
its construction and its method of operation, together with 70 of the hanger Winch 12 and whose other end is secured
to the anchoring member 10. The cable 13 is convoluted
additional objects and advantages thereof, will be best un
on and thus engages with the rotary member or drum 18
derstood from the following detailed description of cer
of the capstan and passes about the guide pulley 11 so
3,079,006
3
4
that, if the winch 12 is operated in a sense to pay out
‘the cable 13 and the capstan 9 is rotated in anticlock
wise direction to travel along the cable 13 in a direction
groups of guide rolls including a ?rst group of rolls 223
whose axes are perpendicular to the axis of the drum 218
toward the guide pulley 11, the boom will turn about the
‘horizontal pin 8 to change its working inclination and its
head will descend while the length of the cable portion
extending between the capstan and the anchoring mem
4, and a second group of rolls 223a whose axes are per
ber will increase at the same rate as the length of the
cable-portion extending between the capstan and the guide
v‘pulley 11. On the other hand, if it is desired to swing
the boom 4 about the vertical pin 7, the Winch 12 remains
‘idle and the motor of the capstan 9 is driven in a direc
tion to move the capstan toward the anchoring member
10 or toward the guide pulley 11. Gf course, it is possi
ble to operate the winch and the capstan motor in such
away that the head of the boom rises or descends and is
simultaneously swung toward or away from the guide
pulley 11.
The cargo hoisting gear of the derrick construction in~
cludes a load supporting book 14 which is mounted at
and substantially perpendicular to the axis of the boom
pendicular to the axis of the boom but are parallel with
the axis of the drum 218. In the embodiment of FIGS.
4 and 5, one guide roll 223 is provided at each side of
the drum 218, and the purpose of these rolls is to guide
the convolutions 13a in planes which are substantially
10 parallel to the axis of the boom. The pairwise arranged
rolls 223a guide the cable 13 independently of the angle
enclosed by the cable portions 13b, 13c. The carriers
which support the rolls 223, 223a are secured to the
housing of the transmission 125.
The embodiment of FIGS. 6 and 7 is analogous to that
15
shown in FIGS. 4 and 5, excepting that the shaft 224 of
the capstan drum 218 is supported by a modi?ed two
armed bracket 325 so that the axis of the drum 218 is
laterally offset from and is perpendicular to the axis of
20 the boom 4. The guide rolls 323 are mounted in the
the free end of a second cable 14a passing about ayguide
same way and perform the same function as the rolls
pulley 15 secured to the head of the boom 4, about a sec
223 of FIGS. 4 and 5.
‘The transmission 125 preferably includes a self-locking
ond ‘guide pulley 16 which is secured to the socket 6, and
having its other end anchored in the drum of a load winch
“mounted on the deck 1.
device, such as a worm and a meshing worm Wheel, in
25 order to enable the capstan to operate without _a. brake.
A brake is always necessary if the transmission includes
Referring to FIG. 2, the hollow rotary member or drum
only a simple gear train.
18 of the power-driven capstan ‘9 accommodates a _re
FIG. 8 illustrates a modi?ed derrick construction in
versible motor 19 and a transmission adapted to drive this
which the cable 13 includes three cable portions 13A,
drum in clockwise or anticlockwise direction in a manner
‘well known in the art. The drum 18 is rotatable in a 30 13B, 13C extending between the twin guide rolls 11A,
11B ‘and the head'of the boom 4, and three cable por
cage or frame 20 which is provided with an eye 21 sent.
tions 13A’, 13B’, 13C’ extending between the anchor
ing as a means for articulately suspending the capstan on
ing member 19A and the boom head. "The capstan 209
the-eye bolt 4a provided on the head of the boom 4. The
is of the type shown in FIGS. 4 and S, i.e. the axis of
cage 20 comprises several interconnected U-shaped bails
22 some or all of which are provided with guide rolls 23 35 its drum 218 is perpendicular to and intersects the axis
of the boom. The transmission and the motor of the cap
having axes perpendicular vto the axis of the drum 18.
stan 209 are assumed to be concealed in the upper end
These rolls extend into close proximity of the periphery
portion of the boom. The cable 13 extends from
of-the drum and serve as a means for maintaining the
the hanger Winch 12 about the guide pulley 11A, about
convolutions 13a of the cable 13 in spaced relation. It
will be noted that the rolls 23 extend substantially radially 40 a second guide pulley 30 which is suspended on the head
with respect to the drum 18 so that they positively pre
vent any undesirable intermingling or overlapping of the
of the boom 4 at a point below the capstan 209, about
the guide pulley 11B, about the drum 213 of the capstan
209, about the guide pulley 31 carried by the anchoring
'
member 10A, about a further guide pulley 32 which is
As-shown in FIG. 2A, one end of the hollow drum ‘18'is
rotatably supported on a hollowshaft member 40 rigidly 45 secured to the head of a boom 4 preferably in mirror
symmetry with the pulley 3g‘), and the second end of the
secured-to frame 20. Shaft vmember 49 turthersupports
cable 13 is then secured to the anchoring member 10A.
the ‘housing of motor 19. ‘The other end of drum 13 is
In other words, the cable 13 passes about a ?rst threefold
rotatably supported on a shaftmember 41 which is.
tackle including the pulieys 11A, 11B and 3t}, and about
likewise secured to frame 729. Mounted on the motor
housing’ 19 are pins 42 carrying pinions 43 which are in 50 a second threefold tackle including the pulleys 31, 32.
convolutions 13a.
mesh with a ‘gear 44 mounted on the shaft of motor 19
and are further in mesh with ‘internal teeth 45 provided
If the motor of the capstan 26? is idle and the winch
.12 is operated, the head of the boom 4 will perform a
composite movement including a movement about the
in the hollow drum 18. An electric cable 46 passes
pivot pin 7 and about the pin 8 (see FIG. 1). If it is
through the hollow shaft member 49 and is connected to
motor 19. When the motor is energized, gear 44 will be 55 desired to top the boom without any swinging movement,
i.e. if the boom is to pivot solely‘about the horizontal
rotatedwaud will cause the pinions 43 to turn on their
pins 42,. ,Pinions 43 will then drive drum 18 through the
internal teeth 45 of the'latter.
’
"
pin 8, the capstan 209 must be driven in a sense to make
sure that the length of cable portions 13A, 13B, 13C, in
FlGQ3 illustrates a modi?ed capstan 1%)‘? including a
creases or decreases at the same rate as the length of
axial with ‘and is ,rotatably mounted at the upper end
will swivel in an are about the axis of the vertical pin
drum V11S‘rnounted on a shaft 124 whose axis coincides 60 cable portions 13A’, 13B’, 130'. If the motor of the
capstan is driven and the winch 12 remains idle, the boom
with ‘the axis of .the boom ,4, lie. the capstan 109 is co
portion of the boom. ' The drum 118 is driven by a re
7 so that the load supporting hook (not shown) travels
versible motor 119 which ismounted on but preferably
on the periphery of a circle.
209 including a rotary drum 218 whose shaft 224 is
bring about any desired movement of the boom, including
topping and lateral swinging movements of the boom, in
contrast to known derrick constructions of which I am
aware at this time and which utilize two hanger Winches
in the head of the?boomA and which drives a trans 65 The bracket 33 which supports the guide rolls 11A,
11B is mounted on one arm 3a of the cross tree, and the
mission_ 125 coupled to the shaft 124.
anchoring member NA is mounted on the other arm 3b
‘The cable 13 is guidedjby rolls 123 whose axes are sub
of the cross tree.
stantially perpendicular to the axes of the shaft 124 and
it will be, noted that _I provide a derrick construction
boom 4. The rolls ‘123 are mounted in a suitable frame
120 secured to the housing of the transmission 125. 70 in which a single hanger winch 12, in cooperation with
a motor-driven capstan at the head of the boom, may
FIGS. 4 and 5 illustrateja di?erently mounted capstan
perpendicular to the axis of the boom 4 and is mounted
in 'a two-armed bracket 226 carried by the housing of
the transmission ‘125. The cable 13 is guided by two
up
5
3,079,006
6
and two ‘distinct cables each having one of its ends an
chored in the respective winch and another end secured to
the head of the boom. In such conventional construc
tions, it is necessary to operate both hanger winches at
different speeds in order to bring about a swinging move
ment of the boom whereas the boom of my improved der
rick construction may be swung back and forth about a
said guide means or toward said anchoring means while
the boom turns about said vertical axis, said boom turn
ing about said horizontal axis when the winch means
is operated to pay out or to collect the ?exible element.
2. In a derrick construction, in combination, support
ing means; a boom having a lower portion and an upper
portion; means for articulately connecting the lower por
vertical pivot axis merely by starting the motor of the
tion of said boom to said supporting means so that said
capstan in clockwise or anticlockwise direction. The en
lower portion is turnable about a substantially vertical
ergy consumption of the capstan motor is very low since 10 axis and about a substantiallly horizontal axis; and means
this motor is normally required to overcome a very small
for turning said boom about said axes comprising winch
resistance when it swings the head of the boom about the
means, power-driven rotary capstan means, means for
vertical pivot pin 7. This accounts for the fact that the
articulately suspending said capstan means on the upper
capstan motor may be accommodated in the capstan
portion of said boom, anchoring means provided on said
drum (FIG. 2) or that it may be mounted in the upper
supporting means at one side of said boom, guide means
end of the boom (FIGS. 3—7). The arrangement of
provided on said supporting means at the other side of
FIG. 8 is utilized when the boom is supposed to lift
said boom, and a ?exible element having a ?rst portion
heavy loads because the tackles insure that the power
secured to said anchoring means and a spaced second por
requirements remain low. Since the improved derrick
tion secured to said winch means, said ?exible element
construction utilizes a single hanger winch, the housing 20 passing about said guide means and about said capstan
which accommodates this winch is much smaller than the
means intermediate said ?rst and second portions thereof
housings of twin Winches in derrick constructions of
and engaging with said capstan means so that, when said
known design.
capstan means is rotated it entrains the upper portion of
Finally, it is equally possible to replace the smooth
said boom along said ?exible element toward said guide
surfaced drum of the capstan 9, 109 or 209 by a power 25 means or toward said anchoring means while the boom'
driven rotary member in the form of a sprocket ‘418
turns about said vertical axis, said boom turning about
(FIG. 9) and to utilize a ?exible element in the form
said horizontal axis when the winch means is operated
of a link or coil chain 413 which need not be convoluted
to pay out or to collect the ?exible element.
on the sprocket 418 but is engaged by this sprocket only
3. In a derrick construction, in combination, support
ing means; a boom having a lower portion and an .upper
to the extent necesary- to insure that the chain is properly
guided and advanced "when the modi?ed capstan 409 is
driven by its motor in clockwise or anticlockwise direc
tion. Therefore, the guide rolls may be dispensed with.
FIG. 10 illustrates a further modi?cation according to
which the rotary member or drum 518 of the capstan 509
portion; means for articulately connecting the lower por-'
tion of said boom to said supporting means so that said
lower portion is turnable about a substantially vertical
axis and about a substantially horizontal axis; and means
for turning said boom about said axes comprising winch
is provided with uniformly spaced substantially hemi
means, power-driven capstan means including a rotary
member having an axis of rotation coinciding with the
axis of said boom, means for connecting said rotary
spherical concave depressions 518a which serve as seats
for uniformly spaced substantially spherical beads 513::
of a ?exible element 513. Here, again, the ?exible ele
member to the upper portion of said boom, anchoring
ment 513 need not be convoluted about the drum 518 be 40 means provided on said supporting means at one side of
cause the beads 5132 insure that the ?exible element can
said boom, guide means provided on said supporting
not slide with respect to the drum 518 when the latter is
means at the other side of said boom, and a ?exible ele
driven by the capstan motor in clockwise or anticlock
ment having a ?rst portion secured to said anchoring
wise direction. It is su?icient if only a portion of the
means and a spaced second portion secured to said winch
?exible element is provided with beads 513a.
Without further analysis, the foregoing will so fully
reveal'the gist of the present invention that others can,
means, said ?exible element passing about said guide
means and about said rotary member intermediate said
?rst and second portions thereof and engaging with said
by applying current knowledge, readily adapt it for vari-'
rotary member so that, when said rotary member is ro
ous applications without omitting features that, from the
tated it entrains the upper portion of said boom along with
standpoint of prior art, fairly constitute essential charac 50 said ?exible element toward said guide means or toward
teristics of the generic and speci?c aspects of this inven
tion and, therefore, such adaptations should and are in
tended to be comprehended within the meaning and range
of equivalence of the following claims.
said anchoring means while the boom turns about said ver
tical axis, said boom turning about said horizontal axis
when the winch means is operated to pay out or to collect,
What is claimed as new and desired to be secured by 55
the ?exible element.
4. In a derrick construction, in combination, support~
Letters Patent is:
1. In a derrick construction, in combination, support
portion; means for articulately connecting the lower por
ing means; a boom having a lower portion and an upper
tion of said boom to said supporting means so that said
ing means; a boom having a lower portion and an upper
portion; means for articulately connecting the lower por
lower portion is turnable about a substantially vertical axis
tion of said boom to said supporting means so that‘said 60 and about a substantially horizontal axis; and means for
lower portion is turnable about a substantially vertical
turning said boom about said axes comprising winch
axis and about a substantially horizontal axis; and means
means, power-driven capstan means including a rotary
for turning said boom about said axes comprising winch
member having an axis of rotation substantially perpen-_
means, power-driven rotary capstan means secured to
dicular to and intersecting the axis of said boom, means
. for connecting said rotary member to the upper portion of
the upper portion of said boom, anchoring means pro
vided on said supporting means at one side of said boom,
said boom, anchoring means provided on said supporting
guide means provided on said supporting means at the
other side of said boom, and a ?exible element having a
?rst portion secured to said anchoring means and a spaced
second portion secured to said winch means, said ?exible
element passing about said guide means and about said
capstan means intermediate said ?rst and second portions
thereof and engaging with said capstan means so that,
when said capstan means is rotated it entrains the upper
portion of said boom along said ?exible element toward
means at one side of said boom, guide means provided on
said supporting means at the other side of said boom, and
a ?exible element having a ?rst portion secured to said
anchoring means and a spaced second portion secured to
said winch means, said ?exible element passing about said
guide means and about said rotary member intermediate
said ?rst and second portions thereof and engaging with
said rotary member so that, when said rotary member is
.‘ rotated it entrains the upper portion of said boom along.
apropos
F:
a
J
said ?exible element toward said guide means or toward
said anchoring means while the boom‘turns about said
vertical axis, said boom turning about said horizontal axis
when the winch means is operated to pay out or to collect
the ?exible element.
5; In a derrick construction, in combination, support"
ing means; a boom having a lower‘portion and an upper
portion; means for articulately connecting the lower por
tion of said boom to said supporting means so that said
2?;
said guide means and about said rotary member inter?
mediate said first and second portions thereof and en
gaging with said rotary member so that, when said mem
ber is driven by said motor means it entrains the, upper
portion of said boom along said ?exible element toward
said guide means or toward said anchoring means while
the boom turns about said vertical axis, said boom turn
ing about said horizontal axis when the winch means is
operated to pay out or to collect the ?exible element.
8. In a derrick construction, in combination, support
ing means; a boom having a lower portion and an upper
axis and about a substantially horizontal axis; and means
portion; means for articulately connecting said boom to
for turning said boom about said axes comprising winch
said supporting means so that said lower portion is turn
means, power-driven capstan means including a rotary
able about a substantially vertical axis and about a sub
member having an axis of rotation substantially perpen
dicular to and o?set with respect to the axis of said 15 stantially horizontal axis; means for turning said boom
about said axes'comprising winch means, capstan means
boom, means for. connecting said rotary member to the
comprising a power-driven rotary member secured to the
upper portion of said boom, anchoring means provided on
upper portion of said boom, anchoring means provided‘
said supporting means at one side of said boom, guide
on said supporting means at one side of said boom, guide
means provided on said supporting means at the other
side of said boom, and a ?exible element having a ?rst 20 means provided on said supporting means at the other
side of said boom, and a ?exible element having a ?rst
portion secured to said anchoring means and a spaced
portion secured to said anchoring means and a spaced
second portion secured to said winch means, said ?exible
second portion secured to said winch means, said ?ex
element passing about said guide means and about said
ible element passing about said guide means and convo
rotary member intermediate said ?rst and second per‘
tions thereof and engaging with said rotary member so 25 luted about said rotary member intermediate said ?rst
and second portions thereof so that, when said rotary
that, when said rotary member is rotated it entrains the
member is driven it entrains the upper portion of said
upper portion of said boom along said ?exible element
boom along said ?exible element toward said guide means.
toward said guide means, or toward said anchoring means
or toward said anchoring means while said boom turns,
while. the boom turns aboutv said vertical axis, said boom
turning: about said horizontal axis'when the winch means 30 about said vertical axis, said. boom turning about. said,
horizontal axis when the winch means is operated to
is. operated to, pay out-or to collect the ?exible element,
pay out or to collect the ?exible element; and means com~
' 6.~.In a derrick construction, in combination, support
prising guide rolls provided at the upper portion of said
ingmeans; a boom having a lower portion and an upper
boom for separating the convolutions of said ?exible
portion; means for articulately connecting the lower por
element on said rotary drum from each other.
35
tion of said boom to said supporting means so that said
9. A derrick construction‘ as set forth in claim 8,
lower portion is turnable about a substantially vertical
wherein said capstan means comprises a cage Iotatably
axis and about a substantially horizontal axis; and means
receiving said rotary member and, supporting said guide
for turning said boom about said axes comprising winch
rolls, said guide rolls extending substantially radially of
means, capstan means including a hollow rotary mem
and having axes substantially perpendicular to the axis
ber, motor and transmission means mounted in and driv 40
of said rotary member.
ingly connected with said rotary member, means for
10. A derrick construction as set forth in claim 8,
connecting the capstan means to the upper portion of
wherein said guide rolls have axes substantially perpen
said‘ boom, anchoring means provided on said support
dicular to the axes of said rotary member and said boom.
ing means’ at one side of said boom, guide means pro
11. A derrick construction as set forth in claim 8,
vided, on said supporting means at the other side of said 45 wherein said guide rolls include a ?rst group of guide
boom, and a ?exible element having a ?rst portion se
rolls having axes substantially perpendicular to and a
cured to said anchoring means and a spaced second por
second group of guide rolls having axes substantially
tion secured to said winch means, said ?exible element
parallel with the axis of said rotary member.
passing about said guide means and about said rotary
12. In a derrick construction, in combination, sup
member intermediate said ?rst and second portions
porting means; a boom having a lower portion and an
lower portion is turnable about a substantially vertical
thereof and engaging with said rotary member so that,
upper portion; means for articulately connecting said
when said rotary member is driven by said motor means
boom to said supporting means so that said lower portion
it entrains the upper portion of said boom along said
is turnable about a substantially vertical axis and about a
?exible element toward said guide means or toward said
substantially horizontal axis; and means for turning said
anchoring means while the boom turns about said vertical 55. boom about said axes comprising winch means, capstan
axis, said boom turning about said horizontal axis when
means comprising a power-driven rotary sprocket secured
the winch means is operated to pay out or to collect the
to the upper portion of said boom, anchoring means pro
?exible element;
vided on said supporting means at one side of said. boom.
guide means provided on said supporting means at the
ing means; a boom having a lower portion and an upper 60 other side of said boom, and a chain having a ?rst por
portion; means for articulately connecting the lower por
tion secured to said anchoring means and a spaced sec
tion of said boom to said supporting means so that said
ond portion secured to said winch means, said chain pass
7, In a derrick construction, in combination, support
lower portion is turnable about a substantially vertical
ing about said guide means and about said sprocket in
axis and about a substantially horizontal axis; and means
termediate said?rst and second portions thereof so that,
65
for turning said‘boom about said axes comprising winch
when said sprocket is driven it entrains the upper portion
means; capstan means including a rotary member
of said boom along said chain toward said guide means
mounted on the upper portion of said boom, motor and
or toward said anchoring means while said boom turns
transmission means mounted in the upper portion of
about said vertical axis, said boom turning about said
saidv boom and drivingly connected with said rotary mem
horizontal axis when the winch means is operated to pay
ber, anchoring means provided on said supporting means 70 out or to collect the chain.
I
at one side of said boom, guide means provided on said
13. In a derrick construction, in combination, sup
supporting means at the other side of said boom, and
porting means; a boom having a lower portion and an
a ?exible element having a ?rst portion secured to said
upper portion; means for articulately connecting the
anchoring means and a spaced second portion secured to
,
lower
portion of said boom to said supporting means so
75
said winch means, said ?exible element passing about
3,079,006
that the boom is turnable about a substantially vertical
axis and about a substantially horizontal axis; and means
for turning said boom about said axes comprising which
means, capstan means including a power-driven rotary
member secured to the upper portion of said boom, an
choring means provided on said supporting means at one
side of said boom, ?rst tackle means including pulley
means secured to said anchoring means, second tackle
means including guide pulley mean-s secured to said sup
porting means at the other side of said boom, and a ?ex
ible element having a ?rst portion secured to said anchor
ing means and a spaced second portion secured to said
winch means, said ?exible element mounted on said ?rst
and second tackle means and passing about said guide
pulley means and about said rotary member intermediate
said ?rst and second portions thereof so that, when said
rotary member is driven it entrains the upper portion of
said boom along said ?exible element toward said guide
pulley means or toward said anchoring means while said
boom turns about said vertical axis, said boom turning
about said horizontal axis when said winch means is
operated to pay out or to collect said ?exible element.
14. In a derrick construction, in combination, sup
porting means including an upright mast and a cross tree
secured to said mast; a boom having a lower portion and
an upper portion; means for articulately connecting the
lower portion of said boom to said mast at a level below
said cross tree so that said lower portion is turnable
about a substantially vertical axis and about a substantially
1%
portion secured to said anchoring means and a spaced
second portion secured to said winch means, said ?exible
element having a plurality of uniformly spaced substan
tially spherical beads and passing about said guide means
and about said rotary member intermediate said ?rst and
second portions thereof, said beads received in the seats
of said rotary member whereby, when said rotary member
is driven it entrains the upper portion of said boom along
said ?exible element toward said guide means or toward
said anchoring means while said boom turns about said
vertical axis, said boom turning about said horizontal
axis when the winch means is operated to pay out or to
collect said ?exible element.
17. In a derrick construction, in combination, support
ing means; a boom having a lower portion and an upper
portion; means for articulately connecting the lower por
tion of said boom to said supporting means so that said
lower portion is turnable about a substantially vertical
axis and about a substantially horizontal axis; and means
for turning said boom about said axes comprising winch
means, power-driven rotary capstan means secured to
the upper portion of said boom, anchoring means pro
vided on said supporting means at one side of said boom,
a guide pulley provided on said supporting means at the
other side of said boom, and a single ?exible element
having a ?rst portion secured to said anchoring means
and a spaced second portion secured to said winch means,
said ?exible element passing about said guide pulley
and about said capstan means intermediate said ?rst and
horizontal axis; and means for turning said boom about 30 second portions thereo? and engaging with said capstan
said axes comprising winch means, power-driven rotary
means so that, when said capstan means is rotated it
capstan means secured to the upper portion of said boom,
entrains the upper portion of said boom along said ?ex
anchoring means provided on said cross tree at one side
ible element toward said guide pulley or toward said
of said boom, guide means provided on said cross tree
at the other side of said boom, and a ?exible element
having a ?rst portion secured to said anchoring means
and a spaced second portion secured to said winch means,
said ?exible element passing about said guide means and
about said capstan means intermediate said ?rst and sec
anchoring means while the boom turns about said ver
tical axis, said boom turning about said horizontal axis
when the winch means is operated to pay out or to collect
the ?exible element.
18. In a derrick construction, in combination, support
ing means; a boom having a lower portion and an upper
ond portions thereof and engaging with said capstan 40 portion; means for articulately connecting the lower
means so that, when said capstan means is rotated it
entrains the upper portion of said boom along said ?ex~
ible clement toward said guide means or toward said
anchoring means while the boom turns about said vertical
axis, said boom turning about said horizontal axis when
the winch means is operated to pay out or to collect the
?exible element.
portion of said boom to said supporting means so that
the boom is turnable about a substantially vertical axis
and about a substantially horizontal axis; and means for
turning said boom about said axes comprising winch
means, capstan means including a power-driven rotary
member secured to the upper portion of said boom, an
choring means provided on said supporting means at
one side of said boom, ?rst three-fold tackle means in
eluding pulley means secured to said anchoring means,
15. A derrick construction as set forth in claim 14,
wherein said winch means is a manually operated hanger
winch having a drum and said ?exible element is a cable 50 second three-fold tackle means including guide pulley
convoluted about said drum and about said rotary mem
means secured to said supporting means at the other side
ber.
of said boom, and a ?exible element having a ?rst por
16. In a derrick construction, in combination, support
tion secured to said anchoring means and a spaced second
ing means; a boom having a lower portion and an upper
portion secured ‘to said Winch means, and ?exible ele
portion; means for articulately connecting said boom to 55 ment mounted on said ?rst and second tackle means
said supporting means so that said lower portion is turn
and passing about said guide pulley means and about
able about a substantially vertical axis and about a sub
said rotary member intermediate said ?rst and second por
stantially horizontal axis; and means for turning said boom
tions thereof so that, when said rotary member is driven
about said axes comprising winch means, capstan means
it entrains the upper portion of said boom along said
comprising a power-driven rotary member secured to the 60 ?exible element toward said guide pulley means or toward
upper portion of said boom and having uniformly spaced
said anchoring means while said boom turns about said
concave peripheral seats, anchoring means provided on
vertical axis, said boom turning about said horizontal
said supporting means at one side of said boom, guide
means provided on said supporting means at the other
axis when said winch means is operated to pay out or to
collect said ?exible element.
side of said boom, and a ?exible element having a ?rst 65
‘No references cited.
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