US2421430A - Device for testing static accumulating properties of textile fibers - Google Patents
Device for testing static accumulating properties of textile fibers Download PDFInfo
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- US2421430A US2421430A US491145A US49114543A US2421430A US 2421430 A US2421430 A US 2421430A US 491145 A US491145 A US 491145A US 49114543 A US49114543 A US 49114543A US 2421430 A US2421430 A US 2421430A
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- plate
- fibers
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- textile fibers
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- 239000000835 fiber Substances 0.000 title description 42
- 230000003068 static effect Effects 0.000 title description 15
- 238000012360 testing method Methods 0.000 title description 12
- 239000004753 textile Substances 0.000 title description 11
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920013683 Celanese Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/365—Filiform textiles, e.g. yarns
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
Definitions
- This invention relates to a testing device, and relates more particularly to a device for measuring the amount of static electricity present on textile materials.
- An object of the invention is the provision of a device for measuring the static electricity produced on fibers by frictional contact with metals, glass, porcelain, pressed fiber and other substances with which the fiber might contact in being processed to a yarn or fabric.
- Another object of the invention is the provision of a device for measuring the effectiveness of various dressings and finishes applied to the fiber in reducing the static charge induced on the fiber and in conducting from the fibers any static produced thereon.
- Figure 1 is a side elevational view of the device of my invention.
- Figure 2 is a detailed view showing the means for supporting the balance lever.
- the present invention overcomes this costly and time consuming method of testing the eifectiveness of'the dressings by measuring the amount of static that can be imposed upon small samples of fibers by a device which is relatively small and compact so that it can be enclosed in a suitable casing where temperature and humidity can be very readily changed and accurately controlled. Also by exchange of readily removable friction discs of different substances, the efiect of said diiierent substances on the material being tested may be ascertained.
- the reference numeral I generally indicates a base or stand provided with a foot 2 of a weight suflicient to prevent undue vibration, and an upright or standard 3.
- A, motor 4 having a suitable power connection v5 is fixed to the upper portion of standard 3 so that the shaft 6 thereof is in a vertical position.
- a nipple I On the lower end of the shaft 6 is suitably attached a nipple I, which may be formed integral with a disc 8.
- the disc 8 is provided with three or four holes through which studs 9 and their surrounding insulators ll pass,
- the insulators may be of sulphur in which case they may be cast in place, or they may be of porcelain, glass, plastic, etc.
- the insulators are held in place on the studs 9 by washers l2 and nuts I3.
- the lower end of the studs 9 are tapped into a collector plate It which may be of iron, copper, or other substance which it is desired to test frictionally with the fibers.
- Various plates l4 for testing with the fibers may be prepared and may be interchanged by the removal of the nipple 1 with its attached plate from the shaft 6 and substituting therefor another nipple carrying the type of plate desired.
- bracket l5 Also mounted on the standard 3 is a bracket l5 having integral therewith two or more horizontally extending arms l6 provided at their.
- the bracket l5 may be attached to the standard 3 by bolts 18 as shown, or by welding or other suitable means.
- Slidably inserted in the slots 11 is a bar I9, with its top end 2
- rangement urges the bar 19 upward by a controlled force governed by the position of counter balance weight 33 along the balance lever 32.
- a nipple 34 Welded or otherwise fastened to a plate 35 is provided for sliding-over the top end
- the upper arm 16 of the bracket I5 is 1 provided with a second slot 24 through which is of bar I9.
- the plate 35 has anti-rotation plugs 36 adapted to register with wells 31 in the bottom of a cup 38 that is supported thereby.
- the pin 25, referred to above, is threaded through the plate 35 so that one end projects above the'plate to form a plug similar to plugs 36.
- the other end, as indicated above, extends through the slot 24 in the arm l6, which construction prevents rotation of the cup 38 and strain on the bar IS.
- the bottom of the cup 38 is roughened or is lined with sand paper 39 or other such material adapted to prevent the sample of staple fiber 4
- a contact finger 43 On a plate 42, electrically insulated from the standard 3 but supported thereby, is mounted a contact finger 43 provided with an insulated key 44 which when manually pressed efiects a contact between the collector plate I4 and the contact finger 43.
- the contact finger 43 is connected to a control panel 45 by a lead-in wire 46 while the stand and all related parts of the device are grounded by a wire 41 connected to the ground terminal 48 of the control panel 45.
- a grounding connection 41 is provided for grounding the device and its electrical circuits.
- the control panel registers the static charge developed upon the sample 4! by the friction between said sample and the revolving plate 14.
- the lead-in wire .46 is connected to a terminal which is connected by lead 52 to one side of a variable condenser 53.
- a lead 54 is run to a manually operated switch 55.
- the switch 55 is in turn connected by a lead 56 to the plate 51 of an amplifier tube generally indicated by reference numeral 58.
- the grid 59 of said tube is connected by a lead 6! to a microammeter 62 that is connected by lead 63 to a manually controlled variable resistor 64 and through a resistance coil 65 to a battery 66 or other suitable source of electric power.
- the battery 66 is connected to a lead 61 to the condenser 53 and to the filament 68 of the tube 58.
- the other end of the filament 68 is connected by a lead 69 to a reslstor H then by lead 72 to lead 63 to complete th filament circuit of the tube.
- the control panel 45 there may be employed any other registering devices well known in the art, as well as attachments that show on a chart a voltagetime curve or the like.
- the whole device may be enclosed in a carrying case (not shown), similar to those used to enclose laboratory balance scales, equipped with a connecting cord and plug for connecting the motor 4 with a source of current.
- Desiccator jars may be placed in such an enclosed case to reduce the humidity or moist humidor blocks may be employed to increase the humidity while the temperature may be controlled by any suitable means such as heating coils, ice cubes, etc.
- the case may be equipped with humidity indicators and thermometer.
- pressure downward on the cup 38 permits access to the interior of the cup so that a sample 4
- a sample of fibers or fibers coated with a dressing is spread in bottom of the cup 38 which when released is forced upward by the weight 33.
- the external conditions having been brought to the desired constant the motor 4 is caused to rotate.
- the cup-38 is pressed downward so that the sample of fibers is no longer in contact with plate l4.
- the key 44 is then depressed and the relative static charge is registered on the microammeter 62.
- the device is designed primarily for testing textile fibers and/or various dressings applied to textile fibers, it may be employed for testing other materials such as ground cork, insulating pellets, etc.
- textile fibers are fibers made of or containing organic derivative of cellulose such as cellulose acetate, cellulose formate, cellulose acetobutyrate, ethyl cellulose, methyl cellulose, benzyl cellulose, etc.; fibers of regenerated or reconstituted cellulose; natural fibers such as cotton, wool, flax, hemp, etc.; and fibers made of synthetic linear polyamide condensation products.
- a means for measuring an electric potential a base for holding a sample of fibers to be tested, a rotatable plate normally out of contact with said base, means for causing said plate to come into contact with the sample of fibers disposed on said base, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate, movable into contact with said plate for carrying any charge developed thereon -to said measuring means.
- a means for measuring an electric potential a base for holding a sample of fibers to be tested, a rotatable plate normally out,of contact with said base, means for moving said base in the direction of said plate so as to cause said plate to come into contact with the sample of fibers disposed on said base, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate,
- a means for measuring an electric potential at base for holding a sample of fibers to be tested, a rotatable plate normally out of contact with said base, means for moving said base in the direction of said plate so as to cause said plate to come into contact with the sample of fibers disposed on said base, said means including a lever arm operatively connected to said base and a counter-balance weight carried by said lever arm, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted,
- a means for measuring an electric potential a plate, a cup for holding a sample of fibers to be tested mounted against rotation on said plate, a rotatable plate normally out of contact with said cup, means for moving said plate and said cup in the direction of said rotatable plate, said means including a bar attached to said first mentioned plate, a lever arm pivotally attached to said bar, and a counter-balance weight carried on said lever arm, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate, 5 600,901
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Textile Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Description
R. v. OTT 2,421,430
DEVICE FOR TESTING STATIC ACCUMULATING PROPERTIES OF TEXTILE FIBERS June 3, 1947.
Filed June 17, 1943 INVENTOR.
RALPH V. OTT.
I ATTORNEYS Patented June 3, 1947 DEVICE FOR TESTING STATIC ACCUMULAT- ING PROPERTIES OF TEXTILE FIBERS Ralph V. Ott, Narrows, Va., assignor to Celanese Corporation of America, a corporation of Delaware Application June 17, 1943, Serial No. 491,145
4 Claims.
This invention relates to a testing device, and relates more particularly to a device for measuring the amount of static electricity present on textile materials.
' An object of the invention is the provision of a device for measuring the static electricity produced on fibers by frictional contact with metals, glass, porcelain, pressed fiber and other substances with which the fiber might contact in being processed to a yarn or fabric.
Another object of the invention is the provision of a device for measuring the effectiveness of various dressings and finishes applied to the fiber in reducing the static charge induced on the fiber and in conducting from the fibers any static produced thereon.
Other objects of the invention will appear from the following detailed description.
In the drawing:
Figure 1 is a side elevational view of the device of my invention, and
Figure 2 is a detailed view showing the means for supporting the balance lever.
Like reference numerals indicate like parts throughout both views of the drawing.
During the processing of fibers, and especially artificial or synthetic fibers, to yarns there is sometimes built upon the fiber a static charge which makes the processing difficult. Heavily charged fibers tend to adhere to certain parts of the machines, to fly away from other machine parts, and to repel each other, thus causing processing difiiculties. Dressings and finishes have been developed to overcome these difiiculties and have met with considerable success. To ascertain the value of the dressings, however, it was necessary to run a full batch of the fibers through standard equipment and note the effect. As the dressings change in properties with changes in humidity and temperature, the evaluation of a particular dressing was both costly and time consuming. Often many days were required to change the humidity and temperature surrounding the large standard equipment. The present invention overcomes this costly and time consuming method of testing the eifectiveness of'the dressings by measuring the amount of static that can be imposed upon small samples of fibers by a device which is relatively small and compact so that it can be enclosed in a suitable casing where temperature and humidity can be very readily changed and accurately controlled. Also by exchange of readily removable friction discs of different substances, the efiect of said diiierent substances on the material being tested may be ascertained.
Referring now to the drawing for a detailed description of my invention, the reference numeral I generally indicates a base or stand provided with a foot 2 of a weight suflicient to prevent undue vibration, and an upright or standard 3. A, motor 4 having a suitable power connection v5 is fixed to the upper portion of standard 3 so that the shaft 6 thereof is in a vertical position. On the lower end of the shaft 6 is suitably attached a nipple I, which may be formed integral with a disc 8. The disc 8 is provided with three or four holes through which studs 9 and their surrounding insulators ll pass, The insulators may be of sulphur in which case they may be cast in place, or they may be of porcelain, glass, plastic, etc. The insulators are held in place on the studs 9 by washers l2 and nuts I3. The lower end of the studs 9 are tapped into a collector plate It which may be of iron, copper, or other substance which it is desired to test frictionally with the fibers. Various plates l4 for testing with the fibers may be prepared and may be interchanged by the removal of the nipple 1 with its attached plate from the shaft 6 and substituting therefor another nipple carrying the type of plate desired.
Also mounted on the standard 3 is a bracket l5 having integral therewith two or more horizontally extending arms l6 provided at their.
outer ends with guide slots H. The bracket l5 may be attached to the standard 3 by bolts 18 as shown, or by welding or other suitable means. Slidably inserted in the slots 11 is a bar I9, with its top end 2| making a sliding fit into the nipple 34 and pivoted at its lower end to a link 22 by a pin 23.
rangement urges the bar 19 upward by a controlled force governed by the position of counter balance weight 33 along the balance lever 32.
A nipple 34 Welded or otherwise fastened to a plate 35 is provided for sliding-over the top end The upper arm 16 of the bracket I5 is 1 provided with a second slot 24 through which is of bar I9. The plate 35 has anti-rotation plugs 36 adapted to register with wells 31 in the bottom of a cup 38 that is supported thereby. The pin 25, referred to above, is threaded through the plate 35 so that one end projects above the'plate to form a plug similar to plugs 36. The other end, as indicated above, extends through the slot 24 in the arm l6, which construction prevents rotation of the cup 38 and strain on the bar IS. The bottom of the cup 38 is roughened or is lined with sand paper 39 or other such material adapted to prevent the sample of staple fiber 4| from being spun around by the action of the collector plate l4.
On a plate 42, electrically insulated from the standard 3 but supported thereby, is mounted a contact finger 43 provided with an insulated key 44 which when manually pressed efiects a contact between the collector plate I4 and the contact finger 43. The contact finger 43 is connected to a control panel 45 by a lead-in wire 46 while the stand and all related parts of the device are grounded by a wire 41 connected to the ground terminal 48 of the control panel 45. A grounding connection 41 is provided for grounding the device and its electrical circuits.
The control panel registers the static charge developed upon the sample 4! by the friction between said sample and the revolving plate 14. To this end, the lead-in wire .46 is connected to a terminal which is connected by lead 52 to one side of a variable condenser 53. From the lead 52 a lead 54 is run to a manually operated switch 55. The switch 55 is in turn connected by a lead 56 to the plate 51 of an amplifier tube generally indicated by reference numeral 58. The grid 59 of said tube is connected by a lead 6! to a microammeter 62 that is connected by lead 63 to a manually controlled variable resistor 64 and through a resistance coil 65 to a battery 66 or other suitable source of electric power. The battery 66 is connected to a lead 61 to the condenser 53 and to the filament 68 of the tube 58. The other end of the filament 68 is connected by a lead 69 to a reslstor H then by lead 72 to lead 63 to complete th filament circuit of the tube. In place of the control panel 45 there may be employed any other registering devices well known in the art, as well as attachments that show on a chart a voltagetime curve or the like.
The whole device may be enclosed in a carrying case (not shown), similar to those used to enclose laboratory balance scales, equipped with a connecting cord and plug for connecting the motor 4 with a source of current. Desiccator jars may be placed in such an enclosed case to reduce the humidity or moist humidor blocks may be employed to increase the humidity while the temperature may be controlled by any suitable means such as heating coils, ice cubes, etc. Naturally, for standardizing the conditions, the case may be equipped with humidity indicators and thermometer.
In operation, pressure downward on the cup 38 permits access to the interior of the cup so that a sample 4| may be placed therein or removed therefrom and permits replacement, if desired, of the plate 14. A sample of fibers or fibers coated with a dressing is spread in bottom of the cup 38 which when released is forced upward by the weight 33. The external conditions having been brought to the desired constant the motor 4 is caused to rotate. After the motor has been allowed to rotate for a definite number of revolutions, or for a definite period of time, the cup-38 is pressed downward so that the sample of fibers is no longer in contact with plate l4. The key 44 is then depressed and the relative static charge is registered on the microammeter 62.
Although the device is designed primarily for testing textile fibers and/or various dressings applied to textile fibers, it may be employed for testing other materials such as ground cork, insulating pellets, etc. Examples of textile fibers are fibers made of or containing organic derivative of cellulose such as cellulose acetate, cellulose formate, cellulose acetobutyrate, ethyl cellulose, methyl cellulose, benzyl cellulose, etc.; fibers of regenerated or reconstituted cellulose; natural fibers such as cotton, wool, flax, hemp, etc.; and fibers made of synthetic linear polyamide condensation products.
It is to be understoodthat the foregoing detailed description is merely given by way of illustration and that many variations may be made therein without departing from the spirit of my invention.
Having described my invention, what I desire to secure by Letters Patent is:
1. In a device for testing the electrical conductivity and static accumulating properties of textile fibers wherein there is employed a means for measuring an electric potential, a base for holding a sample of fibers to be tested, a rotatable plate normally out of contact with said base, means for causing said plate to come into contact with the sample of fibers disposed on said base, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate, movable into contact with said plate for carrying any charge developed thereon -to said measuring means.
,2. In a device for testing the electrical conductivity and static accumulating properties of textile fibers wherein there is employed a means for measuring an electric potential, a base for holding a sample of fibers to be tested, a rotatable plate normally out,of contact with said base, means for moving said base in the direction of said plate so as to cause said plate to come into contact with the sample of fibers disposed on said base, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate,
movable into contact with said plate for carrying any charge developed thereon to said measuring means.
3. In a device for testing the electrical conductivity and static accumulating properties of textile fibers wherein there is employed a means for measuring an electric potential, at base for holding a sample of fibers to be tested, a rotatable plate normally out of contact with said base, means for moving said base in the direction of said plate so as to cause said plate to come into contact with the sample of fibers disposed on said base, said means including a lever arm operatively connected to said base and a counter-balance weight carried by said lever arm, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted,
means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate, movable into contact with said plate for carrying any charge developed thereon to said measuring means.
4. In a device for testing the electrical conductivity and static accumulating properties of textile fibers wherein there is employed a means for measuring an electric potential, a plate, a cup for holding a sample of fibers to be tested mounted against rotation on said plate, a rotatable plate normally out of contact with said cup, means for moving said plate and said cup in the direction of said rotatable plate, said means including a bar attached to said first mentioned plate, a lever arm pivotally attached to said bar, and a counter-balance weight carried on said lever arm, means for rotating said plate whereby a frictional contact with a sample of fibers is effected, supports on which said plate rotating means is mounted, means for insulating said plate from said means for rotating said plate and means, carried by said support and normally insulated from said base and said rotatable plate, 5 600,901
movable into contact with said plate for carrying any charge developed thereon to said measuring means.
RALPH V. O'I'I.
REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,790,540 Hacklander Jan. 27, 1931 1,502,330 Bernini July 22, 1924 1,568,366 De Michele Jan. 5, 1926 1,705,480 Scott-Huntington Mar. 19, 1929 2,166,385 Wintermute July 18, 1939 423,708 Tirmann -1--- Mar. 18, 1890 1,202,672 Chapman Oct. 24, 1916 1,922,933 Dirks Aug. 15, 1933 2,040,962 Strom May 19, 1936 340,842 West Apr. 27, 1886 FOREIGN PATENTS Number Country Date France Feb. 18. 1926
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US491145A US2421430A (en) | 1943-06-17 | 1943-06-17 | Device for testing static accumulating properties of textile fibers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US491145A US2421430A (en) | 1943-06-17 | 1943-06-17 | Device for testing static accumulating properties of textile fibers |
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US2421430A true US2421430A (en) | 1947-06-03 |
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US491145A Expired - Lifetime US2421430A (en) | 1943-06-17 | 1943-06-17 | Device for testing static accumulating properties of textile fibers |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2532010A (en) * | 1944-04-17 | 1950-11-28 | Courvoisier Frederic | Determination of moisture contents |
US2663842A (en) * | 1953-12-22 | Apparatus for measuring electro | ||
US3041531A (en) * | 1959-08-24 | 1962-06-26 | Dow Chemical Co | Card static tester |
US3246239A (en) * | 1962-01-16 | 1966-04-12 | Atlas Chem Ind | Electrostatic generator for use in determining the electrostatic accumulation propertes of fibrous material and the like |
US3544889A (en) * | 1967-12-04 | 1970-12-01 | Rhone Poulenc Sa | Method and apparatus for measuring the electrostatic properties of plastic materials including means for rotating the materials past a charging electrode and a measurement probe |
US4139816A (en) * | 1977-12-15 | 1979-02-13 | Princeton Electro Dynamics, Inc. | Copy paper test apparatus |
US4885543A (en) * | 1988-02-16 | 1989-12-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Electrostatic discharge test apparatus |
US5341103A (en) * | 1992-06-04 | 1994-08-23 | Hercules Incorporated | Apparatus for simultaneously generating and measuring a triboelectric charge |
US6686743B2 (en) | 2000-10-24 | 2004-02-03 | Univation Technologies, Llc | Apparatus for measuring the static charge of flowable solids |
US20150301003A1 (en) * | 2014-04-18 | 2015-10-22 | Gregory Peter Martiska | Method for measuring the tribocharging properties of bulk granular materials and powders |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US340842A (en) * | 1886-04-27 | Testing-machine | ||
US423708A (en) * | 1890-03-18 | Hugo tirmann | ||
US1202672A (en) * | 1914-12-04 | 1916-10-24 | William H Chapman | Generator for static electricity. |
US1502330A (en) * | 1922-09-20 | 1924-07-22 | Bernini Arciero | Electroscopic apparatus for testing the genuineness of woolen and silk materials |
US1568366A (en) * | 1924-06-21 | 1926-01-05 | Micheli Mario De | Testing tool for insulation |
US1705480A (en) * | 1929-03-19 | Electroscopic apparatus | ||
US1790540A (en) * | 1931-01-27 | Signor to hacklander | ||
US1922933A (en) * | 1930-07-30 | 1933-08-15 | Dirks Richard | Measuring method |
US2040962A (en) * | 1933-07-21 | 1936-05-19 | Clifton O Strom | Wear testing machine |
US2166385A (en) * | 1937-04-10 | 1939-07-18 | Behr Manning Corp | Determining electrical characteristics |
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1943
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US340842A (en) * | 1886-04-27 | Testing-machine | ||
US423708A (en) * | 1890-03-18 | Hugo tirmann | ||
US1705480A (en) * | 1929-03-19 | Electroscopic apparatus | ||
US1790540A (en) * | 1931-01-27 | Signor to hacklander | ||
US1202672A (en) * | 1914-12-04 | 1916-10-24 | William H Chapman | Generator for static electricity. |
US1502330A (en) * | 1922-09-20 | 1924-07-22 | Bernini Arciero | Electroscopic apparatus for testing the genuineness of woolen and silk materials |
US1568366A (en) * | 1924-06-21 | 1926-01-05 | Micheli Mario De | Testing tool for insulation |
US1922933A (en) * | 1930-07-30 | 1933-08-15 | Dirks Richard | Measuring method |
US2040962A (en) * | 1933-07-21 | 1936-05-19 | Clifton O Strom | Wear testing machine |
US2166385A (en) * | 1937-04-10 | 1939-07-18 | Behr Manning Corp | Determining electrical characteristics |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2663842A (en) * | 1953-12-22 | Apparatus for measuring electro | ||
US2532010A (en) * | 1944-04-17 | 1950-11-28 | Courvoisier Frederic | Determination of moisture contents |
US3041531A (en) * | 1959-08-24 | 1962-06-26 | Dow Chemical Co | Card static tester |
US3246239A (en) * | 1962-01-16 | 1966-04-12 | Atlas Chem Ind | Electrostatic generator for use in determining the electrostatic accumulation propertes of fibrous material and the like |
US3544889A (en) * | 1967-12-04 | 1970-12-01 | Rhone Poulenc Sa | Method and apparatus for measuring the electrostatic properties of plastic materials including means for rotating the materials past a charging electrode and a measurement probe |
US4139816A (en) * | 1977-12-15 | 1979-02-13 | Princeton Electro Dynamics, Inc. | Copy paper test apparatus |
US4885543A (en) * | 1988-02-16 | 1989-12-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Electrostatic discharge test apparatus |
US5341103A (en) * | 1992-06-04 | 1994-08-23 | Hercules Incorporated | Apparatus for simultaneously generating and measuring a triboelectric charge |
US6686743B2 (en) | 2000-10-24 | 2004-02-03 | Univation Technologies, Llc | Apparatus for measuring the static charge of flowable solids |
US20150301003A1 (en) * | 2014-04-18 | 2015-10-22 | Gregory Peter Martiska | Method for measuring the tribocharging properties of bulk granular materials and powders |
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