US2983127A - Method and device for maintaining a constant temperature control of a sinker bar assembly in a straight bar knitting machine - Google Patents

Method and device for maintaining a constant temperature control of a sinker bar assembly in a straight bar knitting machine Download PDF

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Publication number
US2983127A
US2983127A US724404A US72440458A US2983127A US 2983127 A US2983127 A US 2983127A US 724404 A US724404 A US 724404A US 72440458 A US72440458 A US 72440458A US 2983127 A US2983127 A US 2983127A
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United States
Prior art keywords
sinker
temperature
machine
cooling
bar assembly
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US724404A
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English (en)
Inventor
Arthur J Cobert
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BELGE D OPTIQUE ET D INSTR DE
Belge D'optique Et D'instruments De Precision SA Ste
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BELGE D OPTIQUE ET D INSTR DE
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/30—Devices for controlling temperature of machine parts

Definitions

  • the present invention relates to improvements in straight bar knitting machines, and more particularly to an improved method and device for maintaining a constant temperature control of a sinker bar assembly and the continued accurate register of the sinkers with the several cooperating instrumentalities along the length of a multiple section full-fashioned knitting machine.
  • a further problem is posed by the tendency of certain machine assemblies, in which there is frictional movement of the parts, notably the friction sliding movement of the sinkers of the sinker bar. assembly, to heat up over an extended period of operation with the result that the sinker bar becomes elongated with relation to the cooperating needles, narrowing machine and other assemblies with a resulting loss of register and damage to the machine.
  • Elforts have been made through a pre-heating and adjustment of the sinker bar in the heated condition with relation to cooperating knitting assemblies to overcome this tendency.
  • the individual needle bar units may be mounted in the machine to move axially with the associated portions of the sinker bar to further reduce the chance of interference between the sinker and needle assemblies.
  • the present invention contemplates the provision of an improved device for maintaining several knitting assemblies of the machine and more particularly the sinker bar assembly at a constant unvarying temperature which will be automatically maintained during continued operation of the machine for extended periods of time.
  • the process according to the invention consists first of all in designing these machine parts in such way that. due account is taken of the rates of expansion at the mean temperature of the room in which aforesaid machines will operate, so that the parts in question will operate under normal conditions at this mean temperature, and further consists in maintaining such parts which are subjected to friction, at aforesaid mean room temperature by means of a cooling device.
  • the sinker bed will be permanently kept at a temperature which is very close to the room temperature by means of a cooling device based on the use of a liquid or other coolant.
  • the generated heat can be dissipated into the liquid, thus keeping the sinker bed in a hi h degree of stability and therefore ensuring that the needles, sinkers and other related elements will remain in very good register with one another.
  • a second advantage of this system is the fact that a a cooling device of this kind will not draw-0E heat from parts of the machine which are not directly connected to it. So, for instance, the narrowing frame will not be affected in any way by the cooling system. If a fairly sensitive thermostat is used at the sinker bed, the temperature of the latter can be kept within close enough limits for preventing an appreciable elongation from taking place, thus keeping the sinkers in a constantly centered position with respect to the needles, narrowing points and other related elements,
  • a third advantage ensues from the fact that, as the sinker heads, jacks and jack heads are kept properly centered, they are no longer subjected to friction and therefore undergo much less wear.
  • FIG. 1 is a very diagrammatic representation of the cooling device, subject matter of the invention.
  • Figure 2 is a side view of a sinker head mounted on a sinker bed and equipped according to the invention
  • Figure 3 is a side view of a sinker bed equipped according to the invention.
  • Figure 4 is a schematic representation of an alternative design for the cooling device, object of the invention.
  • FIG 1 refers to the part or parts of the machine which .have been designed and constructed with due regard to the rates of expansion at the mean room temperature of the workshop and which must be permanently maintained at this temperature or very nearly so.
  • One or more tubes 2 made of material of high thermal conductivity, such as copper, are mounted in direct contact with those parts of the machine the temperature of which is to be stabilized.
  • Thoes tubes 2 are part of a circuit consisting mainly of an inlet tube 3, a pump 4, another tube 5, a container 'machine 1 the temperature of which must be stabilized.
  • this cooling 7 would "be possible to feed into container as wate temperature is 3 which need might arise in some exceptional circumstances 3 with constant level device 6 and an outflow 7.
  • Container 6 is fitted with an overflow 8; tube 5 issues from the bottom of container 6, and tube 7 is connected to the aforesaid container 6 at a higher level than aforesaid overflow 8.
  • a cooling liquid such as cold water for instance, is fed into the upper parrot aform'aid container 6 by means of a tube 9.
  • the opening and closing of the inlet tube 9 is controlled by a magnetic valve 1% This valve is energized by an electric circuit controlled by a thermostat 11 located in and on the bottom of container 6.
  • the circulation pump 4 can be driven by an electric motor 12 through a belt 13.
  • the electric circuit of this motor 12 is controlled by a thermostat 14 in contact with or' influenced by the temperature of the part or parts ofv system'to the temperature stabilizationof a sinker head as shown in Figure 2, or of a sinker bed as represented in Figure 3, aforesaid tubes 2 which are :connected in the cooling jliquid circuit and are made of a material with high thermal conductivity, are fastened onto the sinker head 15 by appropriate clamps 16 as shown in Figure 2, and onto the sinker bed 17 by adequate clamps 18 as shown in Figure 3.
  • Container -6' may be located on or near the machine.
  • Thermostat 14 is mounted in the lower part of sinker bed 17 as shown in Figures 2 and 3.
  • a certain number of tubes 2 may be connected in the cooling circuit, depending on the number or on the length of the parts of machine 1, the temperature of which is to be kept constant.
  • Tubes 3, 5, 7 may be either rigid tubes orhoses.
  • the level of cooling liquid or of cooling Water in container 6, is maintained constant by the overflow 8.
  • Pump 4 is connected to the outlet of container 6 and to 't heinlet '3 of the cooling'tubes 2.
  • the coolant or cooling water which has passed through aforesaid tubes 2 is returned to the container 6 by tube 7.
  • the cooling water mentioned by way of example contained in aforesaid cooling circuit automatically reaches the actual temperature .of the parts of machine 1 which must be protected from expansion. If the temperature of these parts has a tendency to rise, the excess heat to which this temperature is due is transferred to the tubes 2 and hence carried away by the water which starts circulating in the circuit on account of the fact that when thermostat 14 operates, it
  • thermostat 11.i if the temperature in question should riseiabove a predetermined limit, aforesaid thermostat 11.
  • the parts 1 the temperature of which must be controlled, arc'in Contact with the tubular elements 2 made of a material of high thermal conductivity.
  • These tubular elements 2 are a part of a circuit comprising a container, 6, a tube 19 connecting the bottom of aforesaid container 6 to the inlet of aforesaid tubular elements 2, and a tube 20 connecting the highest level which is likely to be attained by the cooling fluid in container 6, to the outlet of aforesaid tubular elements 2.
  • an overflow S is fitted to the reservoir 6 and, at a higher level, an inflow tube 9 for an additional cooling fluid, whereby inflow tube 9 is controlled by the magnetic valve 1%
  • the latter is energized by a circuit containing thermostat 14.
  • this simplified design does not contain any pump, electric motor or'thermostat controlling the temperature in container 6.
  • This system operates on the well known therm'o-siphon principle, and the temperature of the cooling fluid is maintained within the predetermined limits by the combined action of thermostat 14 and of the additional amount of coolant, such as fresh water 'for instance, controlled by the magnetic valve 10.
  • a sinker bar assembly including a sinker bar estending along the length of the machine, sinker beds and sin-kers slidably mounted therein, and cooperating knitting assemblies including a series of needles movable as a unit,-the method o f-mainta'ininga constant unvarying temperature of the sinker bar assembly consistent with the established mean room temperature and adjustments for registering of the several cooperating knitting assemblies of the machine during continued machine operation which comprises the steps of applying athermal cooling medium in contact with the sinker assembly for dissipating heat generated in the sinker bar assembly by the sliding movement of the sinkers, adjusting the heat HlSSlPHl,
  • thermostats i1 and 14. must be minimum and maximum thermostats of which the differperature of the sinker bar assembly consistent with the established mean room temperature and adjustments. for registering the several cooperating knitting assemblies of thelmachine during machine operation which comprises the steps of circulating a cooling fiuidinto thermally effective contact with the sinkeria'ssembly for "dissipating heat generated in the sinker bar assembly by the sliding movement of the. sinkers, adiustingthe circulation of said cooling fluid to. dajust :the rate of heat dissipating activity of the cooling .fiuid, 'a'nd tthermostatically.controllingthe adjustment of saidtrateof circulation ,dfithe cooling fluid.
  • a sinker bar asesmbly including a sinker bar extending along the length of the machine, sinker beds and sinkers slidably mounted therein, and cooperating knitting assemblies including a series of needles movable as a unit, said assemblies being adjusted with relation to one another for operation at an established mean room temperature, the combination of a cooling system for dissipating heat generated in the sinker ba.
  • a cooling system for dissipating heat generated in the sinker bar assembly of a straight bar knitting machine which comprises at least one tubular cooling element which is mounted with relation to the sinker bar and sinker beds to dissipate heat generated by sliding movement of the sinkers, and means for circulating a cooling fluid through said tubular cooling element, including a thermostat responsive to temperature changes of said sinker assembly to control the circulation of said cooling fluid to maintain said cooling element and sinker bar assembly at a temperature consistent with the established temperature and adjustments for registering the several cooperating knitting assemblies of the machine during continued machine operation.
  • a sinker bar assembly including a sinker bar extending along the length of the machine, sinker beds and sinkers slidably mounted therein, and cooperating knitting assemblies including a series of needles movable as a unit, said assemblies being adjusted with relation to one another for operation at an established mean room temperature
  • a cooling system for dissipating heat generated in the sinker bar assembly by the sliding movement of the sinkers and thereby for main taining constant the temperature of said sinker bar assembly at a value consistent with the established temperature and adjustments for registering of the several cooperating knitting assemblies of the machine during continued machine operation which comprises a cooling fluid, at least one tubular cooling element disposed with relation to said sinker bar and sinker beds to dissipate heat generated in said sinker bar assembly by continued sliding movement of the sinkers, a coolant reservoir, conduits through which said cooling fluid is circulated from the reservoir to the tubular cooling element and is returned to the reservoir, and thermostatic means responsive to changes of temperature
  • a sinker bar assembly including a sinker bar extending along the length of the machine, sinker beds and sinkers slidably mounted therein, and cooperating knitting assemblies including a series of needles movable as a unit, said assemblies being adjusted with relation to one another for operation at an established mean room temperature
  • a cooling system for dissipating heat generated in the sinker bar assembly by the sliding movement of the sinkers and thereby for maintaining constant the temperature of said sinker bar assembly which comprises a cooling fluid, at least one tubular cooling element disposed with relation to said sinker bar and sinker beds to dissipate heat generated by continued sliding movement of the sinkers, a coolant reservoir, conduits through which said cooling fluid is circulated from the reservoir to the tubular cooling element and is returned to the reservoir, a cooling fluid supply and spill conduits to said reservoir, means including a thermostat for controlling the supply or" cooling fluid to said reservoir to maintain said cooling fluid in the reservoir at a cooling temperature, a pump for
  • a sinker bar assembly including a sinker bar extending along the length of the machine, sinker beds and sinkers slidably mounted therein, and cooperating knitting assemblies including a series of needles movable as a unit, said assemblies being adjusted with relation to one another for operation at an established mean room temperature
  • a cooling system for dissipating heat generated in the sinker bar assembly by the sliding movement of the sinkers and thereby for maintaining constant the temperature of said sinker bar assembly which comprises a cooling fluid, at least one tubular cooling element disposed with relation to said sinker bar and sinker beds to dissipate heat generated by continued sliding movement of the sinkers, a coolant reservoir, a conduit through which said cooling fluid passes to the reservoir and a return conduit from the cooling element to the reservoir by thermal syphonic action, a spill conduit from the reservoir at the same level with the return conduit, a supply conduit to the reservoir, valve means actuable to vary the flow of cooling fluid to the reservoir from the

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Machines (AREA)
US724404A 1957-12-12 1958-03-27 Method and device for maintaining a constant temperature control of a sinker bar assembly in a straight bar knitting machine Expired - Lifetime US2983127A (en)

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BE2983127X 1957-12-12

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US (1) US2983127A (de)
BE (1) BE563140A (de)
DE (1) DE1230516B (de)
FR (1) FR1215041A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347063A (en) * 1964-02-28 1967-10-17 Hobourn Aero Components Ltd Controlled heating of flat warp knitting machines
US3992902A (en) * 1975-09-23 1976-11-23 Rockwell International Corporation Support device for cylinder of a circular knitting machine
CN103173927A (zh) * 2011-12-21 2013-06-26 利巴机械制造有限公司 向环境输出减小的能量的纺织机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024101C2 (de) * 1990-07-30 1999-11-18 Sipra Patent Beteiligung Träger in Zylinder-, Ring-, Platten- oder Scheibenform o. dgl. an einer Rundstrickmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1971316A (en) * 1934-03-03 1934-08-21 Textile Machine Works Frictional movement transmitting mechanism for straight knitting machines
US2354188A (en) * 1941-01-02 1944-07-25 Textile Machine Works Fluid circulating apparatus for knitting machines and the like
US2709350A (en) * 1951-03-08 1955-05-31 Katherine Josephine Meyer Heating arrangement for the center bed of full-fashioned knitting machines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE730865C (de) * 1939-05-21 1943-01-28 Georg Schlenk Dipl Ing Einrichtung zur UEberwachung des Betrebs von flachen Kulierwirkmaschinen mit einer groesseren Anzahl von Arbeitsstellen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1971316A (en) * 1934-03-03 1934-08-21 Textile Machine Works Frictional movement transmitting mechanism for straight knitting machines
US2354188A (en) * 1941-01-02 1944-07-25 Textile Machine Works Fluid circulating apparatus for knitting machines and the like
US2709350A (en) * 1951-03-08 1955-05-31 Katherine Josephine Meyer Heating arrangement for the center bed of full-fashioned knitting machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347063A (en) * 1964-02-28 1967-10-17 Hobourn Aero Components Ltd Controlled heating of flat warp knitting machines
US3992902A (en) * 1975-09-23 1976-11-23 Rockwell International Corporation Support device for cylinder of a circular knitting machine
CN103173927A (zh) * 2011-12-21 2013-06-26 利巴机械制造有限公司 向环境输出减小的能量的纺织机
CN103173927B (zh) * 2011-12-21 2016-01-20 卡尔迈耶产业用纺织品有限公司 向环境输出减小的能量的纺织机

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FR1215041A (fr) 1960-04-13
BE563140A (de)
DE1230516B (de) 1966-12-15

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