US3501130A - Locking toggle arrangement for a capstan - Google Patents

Locking toggle arrangement for a capstan Download PDF

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Publication number
US3501130A
US3501130A US713078A US3501130DA US3501130A US 3501130 A US3501130 A US 3501130A US 713078 A US713078 A US 713078A US 3501130D A US3501130D A US 3501130DA US 3501130 A US3501130 A US 3501130A
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US
United States
Prior art keywords
capstan
lever
blocking
toggle lever
toggle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US713078A
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English (en)
Inventor
Adolf Utermohle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weser AG
Original Assignee
Weser AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weser AG filed Critical Weser AG
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Publication of US3501130A publication Critical patent/US3501130A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7421—Capstans having a vertical rotation axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/16—Tying-up; Shifting, towing, or pushing equipment; Anchoring using winches

Definitions

  • a capstan which is to be turned under load in one direction about its axis includes an annulus of the teeth coaxial with the axis of rotation of the capstan.
  • a locking pawl is provided in form of a toggle lever pivotally mounted in such a manner that in a first position of the two lever sections with reference to one another, in which they are slightly out of alignment with each other, a free end of the toggle lever engages one of the gear teeth and prevents turning the capstan end in the one direction, the reaction force provided by the load acting on the free end of the toggle lever tending to move the same from the first position to a collapsed position.
  • a releasable blocking arrangement engages one portion of the toggle lever and is movable between a blocking position in which it prevents the collapse of the toggle lever and a releasing position in which it permits such collapse.
  • the present invention relates to capstans in general, and more particularly to capstans provided with locking pawl means. More particularly the present invention re lates to so-called warping drums of the type which is used on ships, in harbors and in other installations wherever it is necessary to maintain a rope or tow placed about the capstan in tightened condition when the capstan is at rest, that is when it is not rotated in a sense effecting takeup of the rope.
  • capstans for this purpose wherein the drum carries a disc or an annulus of gear teeth, that is a ratchet gear, into which the free end of a pivotally mounted blocking pawl engages.
  • biasing means is provided which urges the blocking pawl to a position in which it engages the ratchet and prevents rotation of the capstan in a direction permitting unwinding of the rope but which permits rotation of the capstan in opposite direction in which the rope can be further tightened if desired.
  • An additional object of the present invention is to provide such a capstan wherein it is the load or torque acting upon the capstan which itself assists in the release of the locking pawl.
  • abuttment member fixed to such said capstan and having a substantially radially extending abuttment face.
  • Locking pawl means is provided in form of a toggle lever having a pair of lever portions pivotally connected at adjacent ends thereof. One of these lever portions is pivotally connected at the other end thereof to a fixed part and the other lever portion engages with the free end the abutment phase of the abutment member so as to lock the capstan against rotation in the one direction while the lever portions are in a first position in which they are slightly out of alignment with each other.
  • Releasable blocking means engages one of the lever portions and is movable between a blocking position in which it prevents the toggle lever from moving to the collapsed position, and a releasing position in which it permits the movement of the toggle lever to such a collapsed position under the influence of the load acting upon the capstan and therefore upon the free end of the aforenceioned other lever portion.
  • the reaction force of the load exerted upon the capstan by the rope convoluted thereabout which force is usually very high and may be on the order of tons or more, not only will not counteract release of the locking pawl from its locking position, but will actually facilitate and initiate such release as soon as the locking pawl in form of a toggle lever has been freed for its collapsing movement.
  • the collapse of the toggle lever and thereby the disengagement of the locking pawl from the ratchet associated with the capstan is initiated and effected by the reaction force acting upon the capstan.
  • FIG. 1 is a side-elevational view in somewhat diagrammatic form of a device embodying my invention
  • FIG. 2 is a top-plan view of the device shown in FIG. 1, illustrating it in a position in which the capstan has blocked against rotation under the influence of a load acting on the capstan;
  • FIG. 3 is a view similar to FIG. 2, but showing the device or the locking pawl released so that the capstan can rotate.
  • the capstan comprises a drum or a drum head 1 which at its underside is rigid with a ratchet wheel or disc 2.
  • a ratchet wheel or disc 2 This is conventional and need not be pointed out that the ratchet wheel must of course have the teeth which are illustrated in the drawing.
  • a supporting plate 3 is provided on which there is mounted a locking pawl means in form of a toggle lever 4.
  • the toggle lever 4 consists of two sections 4a and 4b.
  • the section 4a is mounted on the support 3 at its free end for turning movement about the pivot 5.
  • the section 412 is mounted on the section 4a for pivotal movement about the pivot 6.
  • the two sections 4a and 4b together thus constitute a toggle lever 4 and the free end of the section 4b is adapted to engage the teeth of the ratchet disc 2.
  • Pivot point 8 is the one which is directed towards the toggle lever 4 which it engages, as clearly shown in FIG. 2, when the toggle lever is to be in the first position in which it prevents rotation of the capstan.
  • the pivot axis defined by the pivot point 8 is located approximately at the apex of the angle defined between the two arms of the lever 7 and it will be appreciated that the central longitudinal axis of the shorter arm of the lever 7 is so arranged, as shown in the drawing, that it is inclinedto the longer arm and with reference to an imaginary vertical intersecting the pivot axis 8 and the toggle lever 4.
  • the blocking lever 7 is provided, of course, for the purpose of counteracting the forces exerted by the capstan under load which tend to collapse the toggle lever so that these forces are incapable of displacing the sections 4a and 4b of the toggle lever to a position where the collapse can take place.
  • the longer arm of the blocking lever 7 is engaged in the region of its free end by a hook member 9 which is mounted for pivotal movement about a pivot point 9a and which is associated with a linkage arrangement 10 which in turn is connected with an actuating lever 11.
  • the actuating lever may be either gripped by hand or may, for instance, be connected with a rope 12 or a similar expedient so that, when the actuating lever 11 is manipulated, the hook 9 will be pivoted about the pivot point 9a to a position where it will disengage the free end of the longer arm of the lever 7, that is out of the position which is illustrated in FIG. 2.
  • the blocking lever 7 will no longer be able to assist the collapsing force acting upon the toggle lever 4 and will be pivoted about the pivot point 8 as the toggle lever 4 collapses to the position illustrated in FIG. 3.
  • a stop is provided against which the toggle lever 4 abuts when it is in the first or locking position thereof, that is the position illustrated in FIG. 2.
  • a biasing means here identified as a biasing spring 15, serves to normally deflect the sections 4a and 4b of the toggle lever 4 to their first or locking position illustrated in FIG. 2.
  • the force of the biasing spring 15 is of course not sufficient to overcome the reaction force provided by the torque acting upon the capstan so that, when the blocking lever 7 is released by arresting arrangement therefore, the spring 15 will yield and permit collapse of the toggle lever 4.
  • a capstan which is to be turned under load in one direction about its axis, at least one abutment member fixed to said capstan and having a substantially radially extending abutment face; locking pawl means in form of a toggle lever having a pair of lever portions pivotally connected at arjacent ends, one of said lever portions being pivotaly connected at the other end thereof to a fixed part and the other lever portion engaging with its free end said abutment face for locking said capstan against rotation while said lever portions are in a first position slightly out of alignment with each other, and the reaction force provided by said load on said free end of said other lever portion tending to move said toggle lever from said first position to a collapsed second position; and releasable blocking means engaging one of said lever portions and movable between a blocking position preventing said toggle lever from moving to said collapsed position and a releasing position permitting movement of said toggle lever to said collapsed position under the influence of said load, said releasable blocking means comprising a blocking lever mounted for turning movement
  • said arresting means includes a pivotally mounted hook member adapted for pivotal movement to and from an engaging position in which it engages said terminal end of said first section for thereby preventing said blocking lever from moving to said releasing position thereof.
  • said arresting means further comprising an actuating member, and a linkage arrangement operatively connecting said actuating member with said hook member for effecting pivotal movement of the same from said engaging position in response to manipulation of said actuating member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transmission Devices (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Prostheses (AREA)
US713078A 1967-03-17 1968-03-14 Locking toggle arrangement for a capstan Expired - Lifetime US3501130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0055185 1967-03-17

Publications (1)

Publication Number Publication Date
US3501130A true US3501130A (en) 1970-03-17

Family

ID=6939872

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Application Number Title Priority Date Filing Date
US713078A Expired - Lifetime US3501130A (en) 1967-03-17 1968-03-14 Locking toggle arrangement for a capstan

Country Status (10)

Country Link
US (1) US3501130A (es)
BE (1) BE712036A (es)
DE (1) DE1481876C3 (es)
DK (1) DK114220B (es)
ES (1) ES351642A1 (es)
FR (1) FR1558067A (es)
GB (1) GB1214542A (es)
NL (1) NL6802930A (es)
NO (1) NO120599B (es)
SE (1) SE356494B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664259A (en) * 1970-07-06 1972-05-23 Addmaster Corp Drum series printer with stop pawl engaged by a snap-over spring
CN104100515A (zh) * 2013-04-12 2014-10-15 中国人民解放军总后勤部油料研究所 可折叠的手摇泵

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103600811B (zh) * 2013-10-28 2016-02-17 武汉船用机械有限责任公司 一种止链装置及锚机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033531A (en) * 1957-11-15 1962-05-08 W W Patterson Co Hydraulic winch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033531A (en) * 1957-11-15 1962-05-08 W W Patterson Co Hydraulic winch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664259A (en) * 1970-07-06 1972-05-23 Addmaster Corp Drum series printer with stop pawl engaged by a snap-over spring
CN104100515A (zh) * 2013-04-12 2014-10-15 中国人民解放军总后勤部油料研究所 可折叠的手摇泵

Also Published As

Publication number Publication date
DE1481876A1 (de) 1969-03-20
DE1481876B2 (de) 1975-02-20
DE1481876C3 (de) 1975-10-02
ES351642A1 (es) 1969-06-01
NL6802930A (es) 1968-09-18
DK114220B (da) 1969-06-09
SE356494B (es) 1973-05-28
FR1558067A (es) 1969-02-21
BE712036A (es) 1968-07-15
NO120599B (es) 1970-11-09
GB1214542A (en) 1970-12-02

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