US2547367A

US2547367A - Method and apparatus for testing fabrics

Info

Publication number: US2547367A
Application number: US654173A
Authority: US
Inventors: Booth Henry
Original assignee: HENRY BOOTH METHODS CORP
Current assignee: HENRY BOOTH METHODS Corp
Priority date: 1946-03-13
Filing date: 1946-03-13
Publication date: 1951-04-03
Anticipated expiration: 1968-04-03

Description

April 3, 1951 H. BOOTH 2,547,367

METHOD AND APPARATUS FOR TESTING FABRICS Filed March 13, 1946 2 Sheets-Sheet 1 INVENTOR HENRY BOOTH BY M, +T -4 ATTORNEYS A ril 3, 1951 H. BOOTH 2,547,367

METHOD AND APPARATUS FOR TESTING FABRICS Filed March 13, 1946 2 Sheets-Sheet 2 ,1 1/ l 1, x, 1/ I, II/ n n I 1/ r/ 1 I h 1 INVENTOR HENRY BOOTH BY OM ATTORNEYS Patented Apr. 3, 1951 METHOD APPARATUS .FO'R TESTING "FABRICS Henry Booth, Bronxyille, N. Y.,,assignor to-. The.

.Henry Booth Methds Corporation,,New York,

N. Y. a corporation of Delaware Application March-1 3, 194's, serialo. 854,113

GOla'ims, 1 My invention relates to a method and apparatus for testing fabrics, and. more particularly for testing the tailoring qualities of fabrics in the making of clothes, shirts, coats, and other articles of wearing apparel.

Weavers of fine fabrics have achieved good results in the weaving of excellent cloth which has sup rior qualities with respect. to color, appearance, touch, and. handle; It has long been known that. certain. fabrics when made into clothes retain their shape and. appearance. over long periods of time and do. not develop bubbles or wrinkles, but seem. to retain their conformityto-thewearer. The ability of a fabric: when made into clothes to retain its shape and fit, can be generally termedthe tailoring quality of a fabric.

Just why some fabrics tailorbetter than others is not generally understood, and .ith'as'beenl'arge-.

1y fortuitous in many cases. One reason .for' the lack of knowledge of tailoring qualities of fabrics is that there has been no real investigation made of tailoring qualities to ascertain why certain cloths havegood tailoring qualities and why others-do not.

one object of my invention is to provide a novel method of studying fabrics: under various conditions of temperature and humidity in. order to investigate the tailoring qualities of fine fabrics.

- Another object of my invention is to provide a novel apparatus for observing the'tailoring quali-.. ties of fabrics for comparative study.

Another objectof my invention is to-iprovide a method and apparatus in which the different tailoring of two garments from the same fabric may be observed in a simple, expeditious, and convenient manner.

' Another object of my invention. is to provide 'a method and apparatus whereby the behavior of the fabrics under varying conditions of temperatoreand humidity may be readily observed.

Other and further objects of my invention will. appear from the following description.

In general, my invention contemplates. the provision of a chamber inwhich a predetermined temperature and humidity may be maintained and varied in accordance with any desired plan. Inthis chamber I provide means for displaying fabrics made into garments by different types of tailoring. Means are provided for changing the temperature and humidity of the chamber over wide limits. At predetermined small intervals of'time, the fabrics are photographed, preferably on afilmwh'ichcan. later be displayed over a relativelyshort period of timeso that the changes which occur duej-to-va-riations in temperature and: humidity can be viewed dynamically and. thus emphasized and be made readily observable.

In the accompanying drawings, which iorm part: of the instant specification and which. are to beread in conjunction therewith, and in which like, reference numerals; are used; to. indicate, like.- parts in the various views,

Fig. 1 is. a diagrammatic sectional plan yiew of apparatus capable of carrying out-j theprocess. of my invention.

Fig. 2 isa diagrammatic view-showing the 813361}: trical circuitsinvolved the,apparatusshowngin Fig. 1

Fig. 3 is; a perspective view of the apparatusshown Fig. 1, with parts broken away.

Referring now to. Fig. I, the-chamber is formed in any Suitable manner and of; any desired shape of insulated walls; I adapted to, prevent; ready heat exchange between. the interior andv the exterior of the chamber. A suitable door 2 is provided for permitting ingress and egress from the chamber; A; camera, 3 of; any suitable coir-v struction is, mounted in one; of the walls'ofthe chamber. .An. observation window 4.; preferably a double window havingv an insulating dead; air 1 4| is adaptedgto take suction from within the;

chamber and. pass air through the hausing 1 whence it. is returned through the opening 8 into the chamber. A b'aille 9 prevents excessive air currents from being created in the chamber, similar baiile. I B difiuses; the airlfiaving the housing 1. 'Within the housing 1 I provide a heat-exchanger H, through which steam; may pass, entering; through pipe 2. controlled by valye i3, and leaving throu h: pipe 54. The heatexchanger ii is fitted, with heateexchange i5,- to increase the-heateexchange surface; Iii-1e valve: {'3 is controlled by a solenoid -l6 and isnormally in a closed position. A similar hous mg IT is provided with an'intake opening 8, and a discharge, opening 29. A, fan 2;| rotated by a motor 22 is adapted to; take, suction from the; atmosphere within the chamber and pass air through't-hehousinjg; H: for discharge through the opening 20 back; into. the chamber, A baflie '23 diffuses the air flowing to the fan 2| and-a baffle 24 causes diffusionof the air being returnedto the chamber. A heataexchange coil 25 PFC-1 vided with heat-exchange fins 26 is positioned. within the housin H. A. motor 2: rive a compressor- 28, of a refrigerating system. at valve,- 29 controls the pipe 30, which normally connects the discharge pipe 3| of the compressor and its suction pipe 32. The valve 29 is controlled by a solenoid 33. When the valve 29 is closed, the compressed refrigerant fluid will flow through pipe 3!, through a condenser coil 34. The hot compressed refrigerant fluid will be cooled in condenser coil 34 by a cooling medium supplied through pipe 35 to the condenser housing 36, leaving through pipe 31. The cooled compressed refrigerant fluid passes into a receiver 38 and i adapted to pass from the receiver through an expansion valve 39, and thence into the refrigerating coil 25. The air passing through the housing I! is thus adapted to be cooled by heat exchange with the refrigerating coil 25. The cooling not only lowers the temperature of the atmosphere passing through the housing ll, but also chills the air below its dew point, precipitating moisture. The precipitated moisture may be drained from the housing I! through drain opening 48. A third housing 42 is provided with communication with the interior of the chamber through openings 43 and 44. A fan 45 driven by a motor 46 is adapted to take suction from the air Within the chamber and deliver it through the housing 42 for exit through opening 44 back into the chamber. A baffle 46' diffuses the air passing into the housing 42 and a baffle 41 serves a similar purpose for air leaving the housing 42. A pipe 48 is connected to a steam supply and is controlled by a valve 49 adapted to be operated by a solenoid 50. The pipe 48 communicates with a manifold to which are connected steam jets 52. The interior of chamber 42 is provided with a plurality of baffles 53. A pipe 54 communicates with a supply of water under pressure such as the city water main. It is controlled by a valve 55 which is operated by a solenoid 56. When the valve 55 is open, water is adapted to be sprayed from a spray pipe 5'! within the housing. The water spray precipitates uncondensed steam which has been theretofore injected into the air passing through the housing 42 to humidify it. Large particles of moisture in suspension are removed from the air passing through the housing 42 by the baflles 54 so that the air being returned into the chamber through opening 44 has been substantially increased in humidity.

l; provide a thermostat 55 connected in a circuit so that when the temperature within the chamber is lower than that desired, the solenoid l6 will be actuated to permit steam to pass through the heat-exchange coil I I and the motor 4| of the fan 6 will be energized. When the temperature is higher than that desired, the thermostat is connected in circuit to close bypass valve 29 of the compressor and to energize motor '22. In this manner, the air in the chamber will be cooled, as will be hereinafter more fully described. I also provide a hygrostat 56. The hygrostat is connected in a circuit so that when the relative humidity within the chamber is lower than that desired, it will energize a circuit to open both valves 49 and 55 and energize the motor 46. The hygrostat further is connected in a circuit so that when the humidity is too high it will energize the motor 22 and operate to cause the closing of valve 29, all of which will be hereinafter more fully described. The camera 3 is provided with magnetic means designated generally in Fig. 1 by the reference numeral 51 adapted to operate the shutter of the camera at periodic intervals and also to transport the film or photographic medium on Y nating current source 12.

which the picture is being made. Within the chamber I position a plurality of photographic fiood lights 58 operated in synchronism with the camera, as will be hereinafter described. The chamber is normally illuminated by an incandescent lamp 59. Within the chamber I provide a plurality of tailors dummies 68 and 6| mounted on suitable pedestals 62 and 53.

Clothes

64 and 65 are fitted on the tailors dummies. One of the tailors dummies may have apparel 64 of known qualities with which the apparel 65 on the tailors dummy BI is to be compared. Similarly, two suits of clothes to be tested, tailored in different manners, may be fitted about the tailors dummies 68 and Bi.

The interiors of the tailors dummies may be made hollow and fitted with thermostatically controlled heating elements set to keep the dummies at about 98 Fahrenheit, which is substantially the temperature of the human body.

Referring now to Fig. 2, which shows the electrical connections of my apparatus, the hygrostat is shown generally by the reference numeral 56'. A bridge network comprising a capacitor 66 by-passed by a variable resistance 61 is adapted to be opposed by a resistance 58 by-passing a variable condenser 69. Resistances 18 and H complete the bridge. A suitable source of alternating potential, such as an alternator 12, is connected across the bridge by conductors I3 and I4. Conductors 15 and 15 are connected to the opposite terminals of the bridge in a circuit containing a bimetallic thermostatic element H. The bimetallic element carries a pair of contact points 18 and 19 adapted to contact contact points 88 and 8! respectively. The dielectric for the condenser 66 comprises the air within the chamber I. As the humidity of the air within the chamber increases, the dielectric value of the air will decrease, and the condenser- 66 will present a lower capacitive impedance to the flow of the alternating current from alter- As the humidity within the chamber decreases, the dielectric strength of the air which forms the dielectric of the air capacitor 65 will increase, thus increasing the capacitiveimpedance to the flow of the alternating current from alternating current source 72. The bridge network is normallyunbalanced so that a predetermined current will flow through the bimetallic element 11 which is in the circuit and connected across conductors 15 and 16. At the predetermined current value, the bimetallic element assumes a position such that neither contact point 19 nor'contact point 78 is in contact with the respective contact elements 8| or 80. Should, however, the humidity within the chamber decrease, the current flowing through the bimetallic element '11 will decrease, thus heating it less strongly, that is, the value of PR, in which I is the current flowing through the bimetallic element, and R is its resistance, will be less. The lower temperature of the bimetallic element, which is normally curved due to the heating effect of the predetermined current, will permit it to assume a straighter position,rthus causing contact point 19 to make contact with contact point 8 I. When this occurs, current will flow from the battery 82, through conductor 83, through conductor 84, through conductor 85, through contact point 19, through contact point 81, through conductor 86, through the field 8! of motor 46, and through its armature, through conductor 88, to ground 89. At the same time, current will fiow from conductor 8fi;..-through:winding; .5I1, to ground: 499;. thus; opening valve 411;. Likewise. current: will flow through the winding of solenoid. 5.6 to ground 9l;,.thus opening: valve 55..

aeWhen the humidity of the. atmosphere within the chamber I, the. testing chamber, increases, more currentwill flow through the.-;bimetalic element: 11,. thus. curving; it. 'liurther. When. this: occurs, contact point. I8 will. make: contact withmutant point 89, permitting; current to flow from.

the. battery 82,, through conductors:- 83 andn84, through; conductor :92, through contact point 18,: through contact point. :89, through conductor 93;. through the field. winding 94 and armature of motor 22., to the ground'95. Itwill be noted that. the other side; of. the: JbatteryBZ" is grounded at: 96. so that the circuit through the.

battery is always completed through ground. At.

the; same time, current will flow through conductor 96, through the. winding of solenoicl33, to ground 91, thus closing the :valve 29-. The motor 21, which drives the. compressor 28 is supplied, electrical potential through conductor 98' and. conductor 9.9, current flowing through the armature of motor 21 and its field winding IM to the ground IIlI... The thermostat. 55 maybe of any suitable type and. is shown asa bimetallic element I02. carrying contact point I03 and contact point I04. When the temperature is too low, the: bimetallic .element I202. will curve to bring contact point I 04 into contact with contact point Hi5. When this occurs, current wil flow from the battery through conductor I06; through conduc' tor 'IIl'IJ', through contact pointIM, through contact-point I05, energizing. the field windin I08 3 and the"; armature of motor 41, the circuitbetng completed through ground I119. time,,-current. will flow through conductor IIII, through the. winding of solenoid I6, to ground IyHi, thus opening valve I3.

When the. temperature in the testing chamber is too. high, the bimetallic element I 02 will curve to; bring contact point I03 into contact with contact point II2. When this occurs, current will flow from the battery through conductor I06, through conductor I13, through contact point I-II3.,through contactpoint-I I2, throughconductor I114, through conductor H5, thus energizing the motor 22 and the. solenoid 33'. A bimetallic-ole ment H6 is positioned within the dummy 60. When the temperature is too low, it is adapted to complete a circuit through theheating resistance I;:-I:?I"to; raise the temperature to the desired point. A similar bimetallic element H8 is positioned withinthe dummy 6'1 and isadapted' to complete a circuit: through heating resistance I I9, to ground I20, when the temperature within the dummy 6| is: too low. Potential is supplied to a timing motor I2'I having a field winding I22, the circuit being completed from conductor 98'to ground I23, through switch I41. The speed of the motor I21 maybe controlled 'by 'vari-abl'e resistance I2 4.- The motor I2I is adapted todrive a revolving conducting arm I25, to which potential is supplied from conductor 98' through conductor I2 6, the. arm I25 being assumed to rotate in a clockwise direction, as viewed in Fig. 2. When the arm makes contact with contact point I21, current will flow from the batterythrough ;conduc-- tors: 83, 98, and I26, through revolving arm I25, through contact point I21, through conductor I28 through the winding I-29 of a solenoid adapted to actuate. the: shutter of camera 3, the circuit being completed through ground I30. At? the, same. time current will flow through con- At the same 6; doctor; I-31I, through; conductor I-32-',. thence through the .filamentsyoithe incandescenttlanrps- 58 to. conductor I 33., and thence-to ground Iii... Further movement of the arm I25 will-.makeconv tact with contact point I35, permitting current. tov flow through the winding I36v of a solenoid. adapted to operate the film-transporting-mecha-s nism of the camera 3, the circuit'being completed through ground I 3']. Thereafter, the contact arm I25 will make contact with conducting segment- I38, completing a circuit through conductor I 39, through the filament of the incandescent lamp 59 to ground I 40. I

The humidity at which the hygrostat 56 is to operate may be readily adjusted by mounting contact points SI and on an adjustable member so that relative position with respect to the bimetallic element 'I-I may be readily control-led.-

The humidity may be further adjusted by varying the capacity of condenser-G9. The temperature at which the thermostat 55" is to operate may be readily adjusted by'mounting the contact points H2 and I 05 on a common supportand moving them relative to the bimetallic element I02, as is well known in the art. It is .to be understood that any suitable adjustable. hygrostat and any suitable adjustable thermostat may be employed. In practice I contemplate the constant variation of humidity or of tempera.- ture or of both by any suitable time mechanism such as clockwork or a timing motor similar to the motor IZI. If desired,v the thermostat and the hygrostat may be. adiusted'by hand at predetermined intervals.

In operation, let us assume that it, is desired. to test a fabric, Suits are tailored of the fabric to, be tested by two different methods of. tailoring; These suits are fittedupon the dummies 6B and BI and placed within the testing. chamber in, the position shownin Fig. l or in any other suite. able. position so that they may be photographed by the. camera 3. Let us assume that the test is to be made at a temperature of 60 Fahrenheit through relative humidities from 10 to 90.. The

c thermostat is set at the temperature. oi60 degrees,

cent and the humidity increased. In either case,"

the test may be .made to. increase the humidity from: a predetermined point to a predetermined point and returned back to the first point.

Let us assume further that, the temperature. within the chamber is below 60 degrees When thisoccurs, the thermostat operates to open valve I3 and start the motor ll. The fan 5 will take, suction of the cool air and pass it through the housing! in contact with the heat-exchanger coil" I I, thus heating the air. The cool air being circulated from the room through a heat-exchanger back through the room will rapidly raise the temperature to 60 degrees. At this point the thermostat operates to de-energize the motor and close the valve I3. If'the temperature weretoo' high, the thermostat would operate to close valve, 29, thus permitting the refrigerant cycleto operate, and to energize the motor 22. The. warm air will be withdrawn from the testing chamber by the fan 25' and passed into contact with the. refrigerating coil 25 to chill the air and the cooled air returned to the chamber. In this manner the temperature is rapidly lowered to the desired temperature.

Let us assume now that the starting humidity is too high. The hygrostat operates to close valve. 2 9, permitting the refrigeration cycle to take place'and to energize the motor 22. The humid air from the testing chamber is withdrawn by fan 2| and passed into contact with the refrigerating coil 25. This chills the air below its dew point and precipitates moisture from the air which is withdrawn through the drain 45. The dry air is returned to the testing chamber. The cooling action which must necessarily take place in the dehydration is compensated for by heat furnished by the heat-exchanger I l. Assoon as the humidity is restored to its predetermined value, the motor 22 will be stopped and the valve 29 will be opened. The opening of valve 29 connects the discharge side of the compressor with the suction side and removes the refrigerating load from the motor 2?, which may run continuously. It is to be understood, of course, that the motor 2''! may be stopped and started instead of using the by-pass valveZS. If the humidity is too low, the hygrostat will operate to open valves 49 and 55 and to energize the motor 46. Dry air will be drawn from the testing chamber, saturated with steam and moisture, and returned to the chamber. As soon as the humidity builds up to the desired value, valves 49 and 5B are closed and the motor d6 stops.

It will be seen that the refrigeration cycle acts to correct both a too high temperature and a too high humidity. The correction of the humid ity will lower the temperature, while the correction of the temperature will lower the humidity. The deficiencies introduced are balanced by the humidifying system and the heating system; All three elements work in unison controlled by the hygrostat and the thermostat. In this manner, the humidity may be controlled within narrow limits in a rapid, simple, and expeditious manner, and further, the humidity may be varied. It will be noted that the thermostat and the hygrostat are within the range of the camera so that each picture will show both the temperature and the humidity at the moment the photograph is taken, the instruments being of the indicating type.

As soon as the testing chamber has reached the initial condiions of temperature and humidity, a switch Ml (shown in Fig. 2) is operatedto-ener gize the timing motor i2l. The shutter is first actuated and the photographic flood lamps 58 energized to take the picture. When the shu'.ter is closed and the flood lights are extinguished, the photo-sensitive medium in the camera, such as a film, is transported to present the next frame, and the act-ion takes place automatically and continuously. In the meantime, the humidity is being changed from the assumed value of a relative humidity of 10 to a relative humidity of 90. Any changes in the arments on the dummies which take place will be recorded photographically. After the particular test being conducted is completed, the photographic medium such as a film is removed from the camera, developed, and prepared for projecting as a moving picture. Let us assume that the photographs were taken every minute, and let us assume further that the cycle of humidity change was performed during a period of twenty-four hours. We then have 1440 frames taken over a period of twenty-four hours. This film can then b projected at the rate of sixteen frames per second and it will produce in a period of a minute and a half, or ninet seconds, the changes which took place over twenty-four hours. Any changes in attitude, hang, or fit will immediately become apparent to one who views the film. At the same time, for example, a

shoulder will develop a wrinkle, which will appear and disappear as the humidity changes from one value to another and back again. Separate frames at various extreme conditions may be enlarged and compared in detail, and the changes will thus become apparent. Furthermore, a plurality of tests of various types may be readily and expeditiously conducted. One test may involve merely a temperature change. Ano.her test may involve a humidity change. One test may comprise the changing of both the temperature and the humidity. In one test both th temperature and the humidity may be increasing, and in one test the temperature may be increasing while the humidity may be decreasing.

It will be seen that I have accomplished the objects of my invention. I have provided an apparatus and method of studying the tailoring qualities of fabrics and the effect ofdifferent types of tailoring on fabrics. I am thu's enabled to produce a positive and perfect account of what transpires in a garment made of a certain fabric or tailored in a certain manner. I am enabled to achieve accurate answers to the following problems:

1. The degree to which different tailoring 0 two garments in the same fabric has affected the appearance of a suit through various cycles.

2. The degree of improvement of the new hairline over the original hairline, and the effect of different tailoring on each.

3. Whether difficulties in tailoring are due to the fabric'or to the method of tailoring.

4. Anaccurate record of a suit at its best and worst condition, together with data concerning the amount of shrinkage and residual shrinkage, and various other factors which would constitute a permanent record to which reference may be had in experiments and development having for their aim the improvement of tailoring qualities.

Shirtings and other fabrics, as well as suitings, can be tested, not only for different methods of tailoring, but also against shirtings and suitings of known shrinkage qualities.

By my method and apparatus I am enabled to determine the effect of the variations and types of thread and-types of canvas used for the manufacture of clothes. Not only am I enabled to measure the changes which take place, but I can actually see the movement of the garment, such as the effect on the shoulders and the front, the effect on the sleeves and other parts of the garment, due to the changes in temperature and humidity.

I have thus provided a method and a'pparatus of solving the sole remaining problem of the clothing industry today, namely, the problem of getting all types of different cloth to come through manufacturing processes true to size. It is known that wool fibers respond very quickly to changes in atmospheric conditions, but itis not known how a'particular cloth will react to temperature and humidit changes. Even if weavers are unable to manufacture cloth free of changes due to temperature and humidity, I am enabled by my method to predetermine what changes will take place in order that .proper allowances can be made so that clothing will come from the manufacturing process true to size and will remain true to size under average atmospheric conditions to be encountered.

It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of the claims. It is further obvious that various changes may be made in details within the scope of the claims without departing from the spirit of the invention. It is, therefore, to be understood that this invention is not to be limited to the specific details shown and described.

Having thus described my invention, I claim:

1. An apparatus for testing fabrics, including in combination a chamber, .a dummy within said chambergipon which apparel made of the fabric to be tested is adapted to be displayed, means for controlling the temperature within said dummy, means for controlling the atmospheric conditions within said chamber, a camera, and means for controlling said camera to photograph said apparel at frequent intervals.

2. An apparatus for testing fabrics, including in combination a chamber, means for heating said chamber, means for humidifying said chamber, means for controlling said heating means, means for controlling said humidifying means, refrigerativemeans responsive to both said controlling means for lowering the humidity and for lowering the temperature within said chamber, means for displaying the fabric to be tested within said chamber, a camera, and means for controlling said camera to make exposures of said fabric at frequent intervals.

3. An apparatus for testing fabrics, including in combination a chamber, a dummy within said chamber upon which the fabric to be tested is adaptedto be displayed, means for heating said chamber, means for humidifying said chamber, means for cooling said chamber, thermostatic means for controlling said heating means when the temperature in said chamber drops below a predetermined point, and for controlling said cooling means when the temperature within said chamber rises above a predetermined point, a,

hygrostat for controlling said humidifying means when the relative humidity within said chamber drops below a predetermined point, and for controlling said cooling means when the relative humidity within said chamber rises above said predetermined point, a camera, and means for controlling said camera to make exposures at predetermined frequent intervals.

4. Apparatus for testing fabrics including in combination a chamber, means for heating the chamber, means for humidifying the chamber,

means for controlling the heating means, means for controlling the humidifying means, refrigerative means responsive to both said controlling means for lowering the humidity and for lowering the temperature within said chamber and means for displaying the fabric to be tested within the chamber.

5. A method of observing the tailoring qualities of a fabric including the steps of displaying the apparel made of the fabric to be tested upon a dummy in a confined space, maintaining the interior of the dummy at substantially the temperature of the human body, varying the atmospheric conditions in the confined space at' a predetermined rate and photographing the displayed apparel at frequent intervals while the atmospheric conditions are being varied.

6. Apparatus for testing fabrics including in combination a chamber, means for displaying the fabric to be tested within the chamber, means for heating the chamber, means for humidifying the chamber, means for cooling the chamber, thermostatic means for controlling the heating means when the temperature in the chamber drops below a predetermined point and fo controlling the cooling means when the temperature within the chamber rises above a predetermined point, a hygrostat for controlling the humidifying means when the relative humidity within the chamber drops below a predetermined point and for controlling the cooling means when the relative humidity within the chamber rises above a predetermined point, a camera, means for controlling the camera to make exposures of the fabric being tested at predetermined frequent intervals.

HENRY BOOTH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number

Claims

4. APPARATUS FOR TESTING FABRICS INCLUDING IN COMBINATION A CHAMBER, MEANS FOR HEATING THE CHAMBER, MEANS FOR HUMIDIFYING THE CHAMBER, MEANS FOR CONTROLLING THE HEATING MEANS, MEANS FOR CONTROLLING THE HUMIDIFYING MEANS, REFRIGERATIVE MEANS RESPONSIVE TO BOTH SAID CONTROLLING MEANS FOR LOWERING HUMIDITY AND FOR LOWERING THE TEMPERATURE WITHIN SAID CHAMBER AND MEANS FOR DISPLAYING THE FABRIC TO BE TESTED WITHIN THE CHAMBER.