US3550873A - Locking mechanisms - Google Patents

Locking mechanisms Download PDF

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Publication number
US3550873A
US3550873A US776179A US3550873DA US3550873A US 3550873 A US3550873 A US 3550873A US 776179 A US776179 A US 776179A US 3550873D A US3550873D A US 3550873DA US 3550873 A US3550873 A US 3550873A
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United States
Prior art keywords
shaft
reel
pins
chain
slot
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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
US776179A
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English (en)
Inventor
William Edward Walker
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Walker Enfield Ltd
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Walker Enfield Ltd
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Publication date
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Publication of US3550873A publication Critical patent/US3550873A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/065—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutching members having a movement which has at least a radial component

Definitions

  • This invention relates to a locking mechanism for locking a member to be carried to an elongate carrier and additionally relates to the construction of the elongate carrier itself.
  • a locking mechanism particularly designed for securing a reel to a reel holder, and comprising a shaft having at least one externally opening, lengthwise extending, slot to receive a length of chain; means were provided for applying to the chain a lengthwise compression force, causing some, but not all, of the pins of the chain to move outwardly of the slot and to engage the reel, thereby locking the reel to the shaftv
  • the slot or each slot has a transverse rebate to retain some only of the pins of the links of the chain but leaving free other pins of the chain for radial movement relative to the shaft rebate. In this way, the chain is positively held in the slot, only the said other pins being enabled to move out of the slot to grip the member to be carried by the shaft.
  • a reel holder comprises a shaft having at least one externally opening lengthwise-extending slot formed with a transverse rebate; for each slot, a length of chain adapted to be received within the slot with some only of the pins of the links retained by the rebate against radial movementwith respect to the shaft, the remaining pins being free to move radially; and means for applying to the chain a lengthwise compressive force tending to force the nonretained pins out of the slot and into engagement with a member carried by the shaft.
  • a reel holder comprises a shaft having a plurality of externally opening, lengthwise extending, cruciform-section slots, each being formed with a pair of transverse rebates, for each slot at length of chain adapted to be received within the slot and having the pins of some links retained by the rebates against radial movement with respect to the shaft and the-pins of other links free to move radially, and means for applying to each chain a lengthwise compression force tending to force the nonretained pins out of the slots and into engagement with a member carried by the shaft.
  • FIG. 1 is an axial section through one end of the reel holder
  • FIG. 2 is a section on the line 11-11 of FIG. 1, showing the shaft only, and
  • FIG. 3 is a similar section on the line III-III of FIG. 1, showing the shaft only
  • FIG. 4 is an axial section through one end of an alternative form of reel holder
  • FIG. 5 is a section on the line V-V of FIG. 4, showing the shaft only.
  • FIG. 1 only one end of the reel holder is shown, it being understood that the other end is similar to that shown.
  • the reel holder has a cylindrical shaft 12, mounted on stub axles, one of which is shown in FIG. 1 at 13.
  • Three cruciform-section slots 14 are milled into the shaft 12, so as to extend axially from one end to the other and to open to the exterior face of the shaft 12.
  • each side face of each slot 14 has a recess or rebate 15, the purpose of which .will be explained subsequently.
  • the slots 14 are spaced equally about the circumference of the shaft 12, as shown in FIGS. 2 and 3, and, at each end, the slots are extended, as at 16, to the interior of the shaft.
  • a length of chain 17 is located in each slot 14 and is secured at each end to a block 19 disposed within the slot.
  • a bolt 18 fixed in the block 19 passes through the wall of the shaft and is attached to actuating means to be described hereinafter.
  • the chain 17 When the chain 17 is at rest it is disposed entirely within its slot 14. Also, the chain is dimensioned so that the heads 20 of the pins of thechain are located in the rebates 15, in which they can slide axially but from which they are unable to move radially. The heads of some selected pins, indicated schematically at 21, are reduced, so that the pins in question are not retained by the rebates 15, but can move out of the slot 14, as shown in FIG. .1.
  • the blocks 19 are retracted to cause the chains to lie entirely within their slots 14.
  • the reel to be carried is threaded onto the shaft so as to overlie the chain length.
  • the actuating mechanism is operated to apply compressive forces to the chains.
  • Those pins 20 having normal'size heads are held by the rebates 15 against radial movement, but the pins with reduced heads 21 are forced outwardly of the slot 14, engage the interior of the reel and thereby lock the reel to the shaft 12.
  • an outward bias is applied to each. as by a leaf spring, which passes externally of the pins 20 and internally of the pins21; alternatively, each pin 21 may be provided with its own biasing spring.
  • each end of the shaft 12 is closed by a cup 22, secured to the end of the shaft by bolts 23 and having an integral pulley 24.
  • the cup 22 carries roller bearings 25 for the stub axle 13, the shaft 12 being mounted on the axles 13 for rotation relative thereto.
  • Each end of the shaft 12 also has a piston 26, which is biased by a helical compression spring27 towards the respective shaft end and to which the bolts 18 are secured.
  • a nipple valve 28 passes through a passage 29 in the wall of the shaft 12 and communicates with that portion of the cylinder formed by the interior of the shaft 12 between the cup 22 and the piston 26 at the left-hand side of the shaft as viewed in FIG. 1.
  • the corresponding part of the cylinder at the right-hand end of the shaft is in communication with that portion at the left-hand by a flexible pipe 30 which passes through the two pistons by means of two unions, one of which is shown at 31, and through the two springs 27.
  • a further pulley 32 is secured to the exterior of the shaft adjacent the nipple valve 28.
  • the cruciform-section of the slots 14 ensures that the chains 17 are always retained in the slots by the engagement of the pin heads 20.
  • the locking mechanism may be employed in conjunction with a reel having an axial length less than the length of the chain; in those circumstances, those pins 21 not enclosed by the reel are first forced out of the slots to their fullest extent, i.e. until the adjacent pins 20 abut one another. Thereafter, the pins 21 enclosed by the reel are urged outwardly against the restraint of the reel and effect the locking action. In this way, a reel holder corresponding to the maximum reel length to be encountered may be employed for holding and locking reels of all lengths.
  • the reel holder of FIGS. 4 and 5 is generally similar to that of FIGS. 1 to 3, except for the actuating mechanism.
  • the shaft 12 is provided with the threeslots 14, each of cruciform-section, and each carrying a length of chain, which is similar to the chain 17 and which is retained in the slot in the same manner as shown in FIG. 1.
  • each end of each chain is attached to a block 19, of rather larger dimensions than that shown at 19 in FIG. 1 and a radially extending portion 40 of that block passes through a short axial passage 41 lthrough the wall of the shaft 12'.
  • the actuating mechanism is manually operated, as distinct from the pneumatic operation of FIGS. 1 to 3.
  • a second, rotary, shaft is located within the hollow shaft 12 and extends from end to end.
  • This shaft has two threaded portions of opposite hands, one of which is shown at 43 and each of which is located within one of the portions of shaft 12 having the slots 41.
  • a nut 44 threaded to the shaft portion 43 is secured to the inwardly projecting portion 40 of the block 19', so that, as the inner shaft 43 is rotated, the block 19' is moved axially. Also, because of the opposite hands of the threads on the threaded portions 43, the two blocks 19 of each slot 14 move in opposite directions, i.e. either towards or away from one another.
  • the inner shaft shown in FIG. 4 is constituted by a number of elements attached to each other end to end.
  • the shaft has at each end of the shaft 42 a headed member 45 carried in a sleeve 46 within the end of the extension 42.
  • This headed member 42 is bolted in the end of a tubular connection member 47 extending to the screw threaded portion 43 at the right-hand end of the shaft 12', as viewed in FIG. 4, that threaded portion being secured within the inner end of the extension member 47.
  • a further extension member 48 is bolted round the inner end of the threaded portion 43 and connects to the threaded portion for the other set of blocks 19, at the left-hand end of the shaft 12. There then follows an extension member, similar to 47, and a headed member, similar to 45, the latter being arranged in the left-hand extension end of the shaft 12.
  • those links of the chain intended to move out of the slot 14 or 14 and to grip the reel may be of a size or form different from that of the other links, being so chosen that the pin heads are not retained in the rebates 15.
  • the reel may be mounted on a tubular reel carrier which is located on the reel holder and with which the pins engage.
  • a reel holder comprising a shaft having at least one externally opening, lengthwise extending slot formed with a transverse rebate, a length of chain adapted to be received in the slot with some only of the pins of the links of the chain retained by the rebate against radial movement with respect to the shaft, the remaining pins being free to move radially, and means for applying to the chain a lengthwise compressive force tending to force the nonretained pins out of the slot and into engagement with a member carried by the shaft.
  • a reel holder comprising a shaft having a plurality of externally opening, lengthwise extending, cruciform-section slots, each being formed with a pair of transverse rebates, for each slot at length of chain adapted to be received within the slot and having the pins of some links retained by the rebates against radial movement with respect to the shaft and the pins of other links free to move radially. and means for applying to each chain a lengthwise compression force tending to force the nonretained pins out of the slots and into engagement with a member carried by the shaft.
  • a reel holder according to claim 1 in which the nonretained pins have reduced heads compared with those of the retained pins.
  • a reel holder according to claim 2 in which one end of each of the chains is operated by actuating means within the shaft for applying the com ressive force. 7
  • a reel hol er accor mg to claim 4 1n WhlCh the shaft is hollow and each of the slots adjacent a chain end extends through the shaft, and in which there is a member secured to each chain, which member extends into the interior of the shaft and is operatively coupled to the actuating means.
  • a reel holder according to claim 5 in which the actuating means acts between the members at opposite ends of the chains to urge them axially towards one another.
  • a reel holder according to claim 6 in which the members at one end of the chains are secured to a first piston slidably arranged within the shaft, while the members at the other ends of the chains are secured to a similarly arranged second piston, and in which there are means for applying fluid under pressure to the two pistons to urge them towards one another.
  • a reel holder according to claim 8 in which the ends of the shaft are closed, there are means for supplying fluid under pressure to one end of the shaft and there is a flexible fluid connection through the two pistons, putting the two shaft ends into communication.
  • a reel holder according to claim 6 in which the members at one end of the chains are secured to a first nut within the shaft and the members at the other end of the chains are secured to a second similar nut, the two nuts being threaded on threaded screws or screw portions axially disposed within the shaft.
  • a reel holder according to claim 11 in which the screws are secured together for common rotation within the shaft.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding Of Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Clamps And Clips (AREA)
US776179A 1968-09-12 1968-11-15 Locking mechanisms Expired - Lifetime US3550873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4346468 1968-09-12

Publications (1)

Publication Number Publication Date
US3550873A true US3550873A (en) 1970-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US776179A Expired - Lifetime US3550873A (en) 1968-09-12 1968-11-15 Locking mechanisms

Country Status (4)

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US (1) US3550873A (de)
DE (1) DE1816659A1 (de)
FR (1) FR1599345A (de)
GB (1) GB1232825A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747868A (en) * 1971-04-02 1973-07-24 Loopco Industries Expansible mandrel assembly
US4223849A (en) * 1977-05-04 1980-09-23 Barmag Barmer Maschinenfabrik Aktiengesellschaft Chucking spindle for the reception of a bobbin carrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747868A (en) * 1971-04-02 1973-07-24 Loopco Industries Expansible mandrel assembly
US4223849A (en) * 1977-05-04 1980-09-23 Barmag Barmer Maschinenfabrik Aktiengesellschaft Chucking spindle for the reception of a bobbin carrier

Also Published As

Publication number Publication date
GB1232825A (de) 1971-05-19
DE1816659A1 (de) 1970-06-25
FR1599345A (de) 1970-07-15

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