US2182349A - Yarn tester - Google Patents

Yarn tester Download PDF

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Publication number
US2182349A
US2182349A US112687A US11268736A US2182349A US 2182349 A US2182349 A US 2182349A US 112687 A US112687 A US 112687A US 11268736 A US11268736 A US 11268736A US 2182349 A US2182349 A US 2182349A
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United States
Prior art keywords
thread
shaft
quadrant
arm
switch
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Expired - Lifetime
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US112687A
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English (en)
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Pagnacco Arrigo
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Individual
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Individual
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables

Definitions

  • This invention relates to machines for the mechanical test of yarn strength.
  • An object of this invention is to insure a more reliable working than could be obtained by prior machines.
  • a further object of this invention is to simplify the construction of known machines for testing yarn strength.
  • a still further object of this invention is to make the working of such machines fully automatic.
  • the invention consists of certain new constructions, arrangements and combinations of parts. Among them, the most important is the provision of a distributor supplying threads from a plurality of bobbins and operated in such manner that said threads from the various bobbins are automatically brought one after another within the range of the mechanism introducing them into the tensile straining device.
  • the change of the bobbins takes place as soon as a determined number of tests have been carried out on the thread of one bobbin.
  • Figures 1 and 2 show in continuation of each other a side viewof the apparatus. 7
  • FIG. 3 is a plan view of Figure 2 and part 01' Figure 1.
  • Figure 4 is a front view of a portion of the recording mechanism drive.
  • Figure 5 is a front view of a clamp of the tensile straining device.
  • Figure 6 is a front view of the distributor or thread changing device.
  • FIG. 7 is the wiring diagram
  • Figure 8 is a partial plan view which illustrates the feeding of the threads from the bobbins to the distributor.
  • the apparatus comprises, in combination, the thread distributor, a tensile straining device, the feed device introducing the thread between the two clamps of the tensile straining device, the
  • the apparatus' is further provided with hand-operated switches for actuation by the operator.
  • the thread F to be tested is stretched betweentwo clamps shown diagrammatically in Figures 1 to 3 where they are designated by l and la,
  • the clamp I ( Figures -1 and 3) is carried by one end of the rod 2 sliding horizontally between guides 2a and 2b and of which the other end is provided with a chain 3 attached to the pulley sector 4 keyed on- 5 the shaft 5, to which is also keyed the pendulum 6, said-pendulum being lifted in clockwise direction when the clamp l is drawn by the thread F towards the right.
  • the pendulum has rigidly attached thereto the arm I carrying on eachside 10 by means of a crossniember 8 the pawls 9 and I0 engaging'the sawteeth of the sector I! and wheel [6, respectively.
  • the toothed sector It is connected through the shaft 5 with the sector [2 and meshes with 5 the sector I on the arm l5 which latter is journalled on the frame of the machine and actuates through the link E1 a recording needle T1 guided between rails G1.
  • the wheel l6 drives through a reducing gear constituted by the toothed wheels ll a second sector equal to and co-axial with the sector ll said second sector actuating through an arm equal to the arm It (said sector and arm are not visible in the drawings, being covered by sector I4 and arm l5) and the link E2 a'further needle T2, guided between rails G2.
  • a chart of some kind is moved under the needles. This mechanism is not illustrated because it may be a common one in the pertinent art. By way of example, supposing 'm to be equal to-seven and n to be equal to ten, the needle 'I'a performs a movement which is one-seventieth oi the movement or the needle T1.
  • the toothed sector II is under the action of the weight I8 articulated to an arm thereof ( Figure 1).- Therefore, when 40 the pawl is disengaged .irom the sector ll, the needle T1 turns to zero.
  • the toothed wheel l6 under the acton of a friction brake l9 actuated by the spring l9a. or by one of the toothed wheels II ( Figure 4) tends together with its respective needle T: to remain in the position to which it has been brought.
  • the thread F draws the clamp I towards the right, due to the operative connections just described (rod 2, chain 3, sector 4, shaft ,5, arm 1), the pawls 9 and Ill ride on the sets of sawteeth of the sector l2 and wheel l8, respectively.
  • the second needle T2 is automatically restored to zero at the end of the nxm'(seventy) tests.
  • the brake I9 is provided with an arm releasing the wheel against the action of the spring Ida, whereby the needle T2 is restored to zero by virtue of the weight of its supporting arm.
  • Arm 20 is actuated by an electromagnet R, the operation of which shall bedescribed hereinafter.
  • the needle T1 marks as many lines as there have been individual tests made. The length of each line corresponds to the breaking load of its respective individual test. This set of lines permits reading of maximum and minimum values.
  • the needle T2 marks one line only, which is of the same order of length as the lines marked by T1 and indicates the average breaking load of all tests carried out.
  • the needle T3 marks, as will
  • the other clamp Ia of the tensile straining defvice is carried by the horizontally movable link 2
  • To the shaft is keyed besides the link 24 the long arm 25 whose toothed segment 2'! meshes with the pinion 28 to which a very slow rotary motion is imparted by the electric motor P on each test by means of a gear drive 29 controlled by the electromagnet N.
  • a third needle Ta ( Figure '1) is provided which is guided be-j tween rails G3 and operated through the link Ea by one of the arms of the beam 32,- to the other arm whereof the end of the flexible link 33, which may be a steel wire or band, is anchored, said flexible member being wound upon the pulley 36 of the lever and anchored to the pulley 36 keyed on the shaft 5.
  • a second flexible link .37 is anchored at one end to a fixed member 38, and runs over a second pulley 39 on the lever 35 and is attached at its other end to the pulley sector 46 integral with the bell crank lever M which is connected by means of the rod 4M: with the link 22 of the pulling parallelogram.
  • the flexible links 33 and 37 are stretched by the weight of the pulleys 34 and 39 and lever 35.
  • the propor tions of the lever arms and radii of the pulleys 36 and 49 are such that when the distance lie-- tween the clamps i, la remains unvaried, that is to say if the clamp Ia does not move forward by an extent greater than the clamp I,the beam cally replaced by a fresh thread which is pulled either from the same bobbin or, after 11. tests (ten in the above -mentioned. example) on a bobbin, from a further bobbin the thread of which is substituted for the former by the distributor.
  • the introduction of the thread into the clamps I and la is effected by a feed mechanism which is visible in Figures 2 and 3.
  • the feed mechanism comprises a double arm slightly exceeding in length the distance between the clamps I and la and provided at its ends with resilient pliers formed by two curved plates 46 which are slightly compressed by a spring (not shown) and adapted to catch the end of a thread when it comes within their circular path.
  • the arm 45 is driven in clockwise direction by the electric motor P by means of the toothed wheel 42 through a clutch 43 operated by the electromagnet M, so that the arm 45 performs half a turn whenthe pendulum 5 is returned to zero.
  • the wheel 42 is keyed on the shaft 44 at equal distances from the two clamps.
  • a cam disc 41 is keyed on the same shaft 44 and is formed with a circular groove 41', having two re-entering portions in the form of large We at opposed points on the diameter perpendicular to the arm 45 only one of these Vs being visible; in Figure 2.
  • A'roller 48 runs in this groove and to the pivot thereof are articulated the ends of the two beams 49 rockably mounted on the pivots 49a of a vertical fixed plate L, the pivots 4911 being adjustable in height.
  • the free ends of the beams 49 by means of wedges 49b carried thereby open and hold open the clamps I and la.
  • the clamps are opened as soon as one of the pliers 46 has caught the end of the thread due to the dropping of the wedges 49b when the roller 48 leaves the notch in the groove 41'.
  • the wedges 491 are raised and the clamps I and la closed, the latter shortly after the former.
  • the feeler 30 being lowered, pulling ofthe thread starts by the action of the articulated parallelogram, while the feed mechanism remains inoperative and in a well-defined position.
  • the clamps I and Ia comprise each ( Figure 5) a jaw 50 fixed on the link 2
  • a small arm 53 having a roller 53' is secured to the jaw 50 which carries the pin 50b for the bell crank lever 54 of which one arm carries the roller 54' opposing the roller 53', and the other arm whereof is formed with a tooth 55 which by riding on an inclined surface Mo on the jaw 5
  • the tooth 55 is caused to ride on the surface 5i by drawing the two rollers 53' and 54 away from each other by the wedges 49b of the beams 49 during rotation of the M45.
  • the distributor ( Figures 1, 6, and 8) comprises a sector 56 rotatable about a pivot 58' parallel to the thread F and situated to the left of the pliers 46 of the feed mechanism.
  • the sector 56 is formed at its lower part with a set of sawteeth 51 and at its periphery on a segment oi wood 58 an eyelet 59 and a small arm 80 are provided for each bobbin, the small arm 60 being equipped with a spring 6
  • the five first pliers 60, ii, etc. are omitted for the sake of clarity.
  • the end F of. the thread F on each bobbin runs through the eyelet 59 and is placed between the pliers 60, 6
  • the circular path of the pliers 46 of the feed mechanism intersects the line of the thread end F. 0n raising the left hand pliers 46, they will engage the end F of the thread and carry same first to the left of and then over the clamp in a semi-circular movement, thereby drawing the thread F from the bobbin. At a determined position of the pliers during this movement the thread F is inserted from above into the clamp i, whereupon the latter closes under the action of the above described mechanism. Shortly thereafter, the thread from above also arrives into the clamp Ia, whereupon the latter closes.
  • Actuation of the electromagnet S is effected by means of a wheel Z (see diagram in Figure 7) which performs a fraction end of the arm 45.
  • the various elements of the apparatus are actuated one after another automatically in the desired order by virtue of the interlocking of electrical circuits according to the diagram in Figure 7.
  • On a main circuit connected to the supply line are shunted the circuits for the electric .motor and electromagnets operating the various members, in which mercury switches are the circuit C of the electromagnet M forthe clutch 43 for the feed mechanisms there is a mercury switch 63 which is connected in series closed by the pendulum 6 when the latter is in connected.
  • the circuit A of the motor P is' provided with a hand-operated switch 'II which its zero position, and the pair of delay-action switches 54, in parallel with each-other and- 5 acted upon alternately by either end of the arm 45. Consequently, the clutch '43 for the feed mechanism is not coupled unless the pendulum has been fully restored to zero and one of the switches 64 and 65 has at the same time closed.
  • a mercury switch 66 is placed in the circuit D of the electromagnet S of the distributor and is closed for an instant by the actuating wheel Z every nth (tenth) test; a further switch 61 is available to the operator who, by opening this switch, is able to discontinue the operation of the distributor and efiect any desired number of tests on' one and the same spindle.
  • the same wheel Z closes by means of a tooth y the switch 68 of the circuit E of the electromagnet R.
  • a machine of the type described for testing threads from a. plurality of bobbins compris- 5 members adapted to advance the distributor to such an extent that the threads from the individual bobbins come successively within range of said introducing mechanism and automatic means adapted to actuate said members for advancing thedistributor after a determined number of tests.
  • a machine of the type described for testing threads from a plurality of bobbins comprising in combination a tensile straining device, a mech- 5 anism for introducing a specimen into said tensile straining device, clamps in said mechanism, for the specimens, a distributor, nippers and an eyelet on said distributor for the thread from each bobbin, said'nippers and eyelet being ar- 39 ranged on either side, respectively, of the path of the clamps of said introducing mechanism, 'members adapted to advance the distributor by such extent that the connectingthreads between the pairedeyelets amd nippers come successively within rangeof.
  • said clamps of the introducing mechanism and automatic means adapted to actuate said advancing members after a predetermined number of tests.
  • a machine of the type described for testing 9 threads from a plurality of bobbins comprising in combination a tensile straining device, clamps on said tensile straining device for the specimens, a member adapted to introduce the thread into said clamps and free to rotate, means adapted to '5 impart to said member at eachtest a rotation in a ,constant direction, pliers on said member for holding said threads during their introduction, a distributor carrying separately thread lengths from the plurality of bobbins, members adapted w to advance the distributor by such extent that the lengths of the said various threads come successively within range otsaid pliers and automatic means adapted toactuate said advancing members after a predetermined number of tests.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Treatment Of Fiber Materials (AREA)
US112687A 1935-11-30 1936-11-25 Yarn tester Expired - Lifetime US2182349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT464202X 1935-11-30

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US (1) US2182349A (enrdf_load_stackoverflow)
BE (1) BE418620A (enrdf_load_stackoverflow)
FR (1) FR814173A (enrdf_load_stackoverflow)
GB (1) GB464202A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437182A (en) * 1992-02-07 1995-08-01 Zellweger Luwa Ag Method and device for determining strength properties of the warp threads of a warp
CN114441294A (zh) * 2022-02-14 2022-05-06 国网吉林省电力有限公司长春供电公司 一种电缆拉伸强度试验装置
CN114577603A (zh) * 2022-02-16 2022-06-03 安徽省嘉佰利针织品有限公司 一种可调节式袜体开口检测设备
CN119147397A (zh) * 2024-11-18 2024-12-17 海阳英伦纺织有限公司 一种纺织纱线韧性检测装置
CN119757023A (zh) * 2024-12-05 2025-04-04 南通文凯化纤有限公司 一种锦纶线强度测试装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117250080B (zh) * 2023-11-06 2024-04-05 金华市丰硕化妆用品有限公司 一种化妆刷的刷毛强度检测装置
CN119880684B (zh) * 2025-03-31 2025-06-27 湖南人文科技学院 一种通信光缆测试装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437182A (en) * 1992-02-07 1995-08-01 Zellweger Luwa Ag Method and device for determining strength properties of the warp threads of a warp
CN114441294A (zh) * 2022-02-14 2022-05-06 国网吉林省电力有限公司长春供电公司 一种电缆拉伸强度试验装置
CN114441294B (zh) * 2022-02-14 2022-09-13 国网吉林省电力有限公司长春供电公司 一种电缆拉伸强度试验装置
CN114577603A (zh) * 2022-02-16 2022-06-03 安徽省嘉佰利针织品有限公司 一种可调节式袜体开口检测设备
CN114577603B (zh) * 2022-02-16 2024-03-08 安徽省嘉佰利针织品有限公司 一种可调节式袜体开口检测设备
CN119147397A (zh) * 2024-11-18 2024-12-17 海阳英伦纺织有限公司 一种纺织纱线韧性检测装置
CN119757023A (zh) * 2024-12-05 2025-04-04 南通文凯化纤有限公司 一种锦纶线强度测试装置

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Publication number Publication date
BE418620A (enrdf_load_stackoverflow)
FR814173A (fr) 1937-06-17
GB464202A (en) 1937-04-13

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