会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 15. 发明专利
    • Apparatus for use in testing the porosity of a fabric or like material
    • GB594000A
    • 1947-10-30
    • GB1598245
    • 1945-06-22
    • GERARD WILLIAM CARLINGWILLIAM DONALD BROWN
    • G01N15/08G01N33/36
    • 594,000. Testing physical qualities of materials. CARLING, G. W., and BROWN, W. D. June 22, 1945, No. 159S2. [Class 106 (ii)]- [Also in Group VIII] Apparatus for testing the porosity of a fabric comprises a base 1 with a housing 2 within which an arm 3 is pivotally mounted at 4. The base 1 has an opening 5 over which the fabric is placed and through which air under pressure is blown. At the end of the arm 3 a casing is formed within which is slidably mounted a plate 19 from which are suspended two concentric cylinders 25,.26. The plate 19 carries inverted bolts 30, 35 whose heads bear on springs in the cylinders 25, 26. The arm 3 is held in the operative position as shown in Fig. 2 by a spring clip 17. When the operating means, comprising a lever 48, 49, 50 coupled by toggle mechanism to the plate is raised, a rod 60 disengages the clip 17 allowing the arm to be raised. On fully depressing the lever, the lower extension 40 of the cylinder 25 pushes out a rubber ring 46 into the centre of the groove 45, thus tensioning the material which is finally clamped in this position by the extension 41 of the cylinder 26. To prevent inadvertent release of the operating lever, the arms 49, 50 are provided with spring-urged balls.