US2941262A - Cradle for top rolls of double apron drafting arrangements - Google Patents

Cradle for top rolls of double apron drafting arrangements Download PDF

Info

Publication number
US2941262A
US2941262A US763689A US76368958A US2941262A US 2941262 A US2941262 A US 2941262A US 763689 A US763689 A US 763689A US 76368958 A US76368958 A US 76368958A US 2941262 A US2941262 A US 2941262A
Authority
US
United States
Prior art keywords
cradle
apron
axle
top roll
bar
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
US763689A
Other languages
English (en)
Inventor
Schiltknecht Adolf
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.)
Joh Jacob Rieter und Cie AG
Original Assignee
Joh Jacob Rieter und Cie 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 Joh Jacob Rieter und Cie AG filed Critical Joh Jacob Rieter und Cie AG
Application granted granted Critical
Publication of US2941262A publication Critical patent/US2941262A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the present invention relates to a cradle for double apron drafting arrangements in spinning machines.
  • Cradles for double apron drafting arrangements which are directly or indirectly connected with the top roll carrier or which are loosely suspended from the axle of the top roll-pair and are held in place only by aprons looped around the top rolls.
  • Cradles for the upper aprons of double drafting arrangements are known which are adapted to yieldingly change the distance between the point of reversal of the apron and the axis of the top roll by the action of a spring which counteracts the tension of the apron.
  • the optimal tension of the upper apron which tension is required for faultless drafting is reliably maintained.
  • the top roll cradle is provided with two brackets connected with the rigid apron reversal bar and adapted to rest on the axle intercom necting the two top rolls.
  • the sides of the brackets facing the top rolls are individually provided with a bearing for the top roll axle, the bearings being rigidly spaced from the line at which the apron contacts the reversal bar, each bearing including two fiat surfaces on which the axle rests, the planes of the surfaces preferably forming an acute angle and being parallel to the linear line of contact between apron and reversal bar and thereby accurately maintaining the position of the axle of the pair of top rolls in parallel relation to the line of contact of the apron with the reversal bar of the cradle due to the effect of the tension of the apron.
  • Fig. l is a top view, looking at a right angle to the drawing field, of a cradle according to the invention resting on the axle of a pair of top rolls.
  • Fig. 2 is a large scale sectional view of the device shown in Fig. 11, the section being made along line II-II in Fig. 1.
  • Fig. 3 is a perspective view of a cradle according to the invention.
  • Fig. 4 is a large scale sectional view of the device shown in Fig. 1, the section being made along line IVIV in Fig. l, and including aprons and a saddle for supporting the top roll assembly and means for retaining the cradle in the desired position.
  • the cradle 1 is made of one piece and includes an apron guide portion 2 and a mountingportion 3 for holding the cradle 1 in proper position on a top roll assembly 5.
  • Two aprons 4 are looped around the apron guide portion and the top roll assembly.
  • the apron guide portion 2 includes a reversal bar 6 8, 9 which prevent lateral movement of the aprons.
  • mounting portion 3 includes two symmetric brackets 10, 11 which partly surround the top roll axle 12, a rigid axle retainingflap 13, 14, respectively, being provided on each bracket and in cooperation with the brackets prevent falling 01f of the top roll assembly located therebetween.
  • Each bracket 10, 11 has a bearing surface positioned in a common plane B and each retaining flap 13, 14 has a surface 15, 16, respectively, positioned in a common plane A, the planes forming an angle a and being in absolutely parallel position with respect to the straight front edge 7.
  • Each bracket has a somewhat yielding portion 10', 11', respectively, bent around the axle 12 and having an end portion of reduced width, the end portions being connected by a transverse bar 17.
  • the yielding portions 10', 11 are bent at such a distance from the flaps 13, 14 that there is a clearance at the part c of the portions 10', 11 which clearance is so small that it is not visible in Fig. 2.
  • the radius of the bends is somewhat smaller than that of the axle 12. This prevents contact of the mounting portion 3' with the axle 12 at undesired locations.
  • the bearing surfaces 15, 16, Le, the plane A makes an angle a of about with the plane B of the reversing bar 6.
  • the plane B in which the undeformed portions of the brackets 10, 11 are located is placed at an angle ,9 of about 95 with respect to the plane in which the yielding portions 10', 11 are located.
  • a spring 31 is connected in the conventional manner with a saddle 30 supporting the top roll assembly 5, the spring 31 having end portions which are inserted in suitable recesses 32 and 33 in the saddle 30.
  • the spring 31 is provided with an extension 34 which is placed around the forward end 35 ot the saddle 30 and has a looped end 36 which slightly presses against the top of the reversal bar 6. This prevents lifting of the bar 6 and rotation of the cradle 1 in the direction of movement of the apron 4.
  • a spacer element 38 is mounted on a reversal bar 39 for the lower aprons 37 between the latter, the reversal bar 6 resting on the element 38.
  • An accurate position of the apron according to the invention can be obtained simply by making the bearing surfaces for the axle of the top roller pair, i.e., the bearing surfaces on the faces 15, 16 and on the brackets 10, -11 exactly parallel to the line "of 'contact'of the apron Wlthlhfi! reversing bar 6. With the structure of the apron cradle according to the invention this can be done at a minimum of manufacturing cost.
  • a cradle for the top aprons of a drafting arrangement of 'a spinning machine comprising an apron reversal bar, and two brackets laterally extending from said reversal bar and being adapted to rest on the axle interconnecting the two bosses of a top roll, each of said brackets forming a bearing for the top roll axle each of said bearings having two substantially plane bearing surface portions placed at an angle with respect to each .4 t other and in fixed parallel relation to the line of contact of the aprons with'said reversal bar.
  • a cradle as defined in claim 1 in which the angle formed by the planes of said plane bearing surface portions is less than 90 and more than 3.
  • each of said brackets includes a substantially flat portion parallel to the top roll axis and forming one of said plane surface portions and a flap member disposed at a substantially right angle to said fla't portion, said flap member having an edge placed in the plane of the other of said bearing surface portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US763689A 1955-05-18 1958-09-26 Cradle for top rolls of double apron drafting arrangements Expired - Lifetime US2941262A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2941262X 1955-05-18

Publications (1)

Publication Number Publication Date
US2941262A true US2941262A (en) 1960-06-21

Family

ID=4572909

Family Applications (1)

Application Number Title Priority Date Filing Date
US763689A Expired - Lifetime US2941262A (en) 1955-05-18 1958-09-26 Cradle for top rolls of double apron drafting arrangements

Country Status (4)

Country Link
US (1) US2941262A (fr)
BE (1) BE547233A (fr)
FR (1) FR1147864A (fr)
GB (1) GB810269A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028636A (en) * 1955-12-02 1962-04-10 Rieter Joh Jacob & Cie Ag Cradle for top rolls of double apron drafting arrangements
US3050789A (en) * 1958-08-05 1962-08-28 Skf Kugellagerfabriken Gmbh Device for supporting and guiding belts of drafting assemblies
US4538329A (en) * 1980-10-31 1985-09-03 Murata Kikai Kabushiki Kaisha Draft device
US5335397A (en) * 1992-06-27 1994-08-09 Hans Stahlecker Two-apron drafting unit for spinning machines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922145C (de) * 1949-04-10 1955-01-10 Zellwolle Lehrspinnerei G M B Zweiriemchen-Streckwerk fuer Spinnmaschinen
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922145C (de) * 1949-04-10 1955-01-10 Zellwolle Lehrspinnerei G M B Zweiriemchen-Streckwerk fuer Spinnmaschinen
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028636A (en) * 1955-12-02 1962-04-10 Rieter Joh Jacob & Cie Ag Cradle for top rolls of double apron drafting arrangements
US3050789A (en) * 1958-08-05 1962-08-28 Skf Kugellagerfabriken Gmbh Device for supporting and guiding belts of drafting assemblies
US4538329A (en) * 1980-10-31 1985-09-03 Murata Kikai Kabushiki Kaisha Draft device
US5335397A (en) * 1992-06-27 1994-08-09 Hans Stahlecker Two-apron drafting unit for spinning machines

Also Published As

Publication number Publication date
FR1147864A (fr) 1957-12-02
BE547233A (fr) 1959-11-06
GB810269A (fr) 1959-03-11

Similar Documents

Publication Publication Date Title
US5027476A (en) Bearing and loading arm for drafting units
US2941262A (en) Cradle for top rolls of double apron drafting arrangements
US1870095A (en) Reducing device for slivers for drawing mechanisms for textile slivers
US2694230A (en) Supporting and weighting device for the top rolls of textile drawing mechanisms
US2430611A (en) Drawing mechanism for spinning and roving frames
US2677858A (en) Cradle for top aprons as used in high-draft systems
US5042112A (en) Drafting unit for a spinning machine
US1448191A (en) Drawing mechanism
US2683290A (en) Fiber condensing means for use in preparatory and spinning machines
US2329655A (en) Drafting mechanism for spinning and roving frames
US3038213A (en) Drafting mechanism for textiles
US2074556A (en) Drawing mechanism of spinning machines
US1448192A (en) Drawing mechanism
US2964806A (en) Wiper for top rolls of drafting arrangements
US3568258A (en) Adjustable textile drafting apparatus
US2027212A (en) Spinning frame
US3028636A (en) Cradle for top rolls of double apron drafting arrangements
US2893065A (en) Underclearers for textile fibre roller drafting mechanisms
US3404434A (en) Fiber drafting system
US2953822A (en) Double apron drafting arrangement
US2633607A (en) Clip
US3156953A (en) Textile drafting apparatus
US2257045A (en) Spinning frame
US2932068A (en) Cradle unit for apron type fiber attenuating apparatus
US2943361A (en) Spinning frame apron guides