GB613915A - Improvements in or relating to gas filters - Google Patents

Improvements in or relating to gas filters

Info

Publication number
GB613915A
GB613915A GB1005045A GB1005045A GB613915A GB 613915 A GB613915 A GB 613915A GB 1005045 A GB1005045 A GB 1005045A GB 1005045 A GB1005045 A GB 1005045A GB 613915 A GB613915 A GB 613915A
Authority
GB
United Kingdom
Prior art keywords
felted
wool
rolling
mixed
ohms per
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
Application number
GB1005045A
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.)
DANIEL JAMES THOMAS
HENRY LIONEL GREEN
ROBERT MAXIMILIAN ARMITAGE WEL
WALTER JOHN HARRIS
Original Assignee
DANIEL JAMES THOMAS
HENRY LIONEL GREEN
ROBERT MAXIMILIAN ARMITAGE WEL
WALTER JOHN HARRIS
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 DANIEL JAMES THOMAS, HENRY LIONEL GREEN, ROBERT MAXIMILIAN ARMITAGE WEL, WALTER JOHN HARRIS filed Critical DANIEL JAMES THOMAS
Priority to GB1005045A priority Critical patent/GB613915A/en
Publication of GB613915A publication Critical patent/GB613915A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Filtering Materials (AREA)

Abstract

613,915. Gas filters. GREEN, H. L., THOMAS, D. J., HARRIS, W. J., and WELCHMAN, R. M. A. April 20, 1945, No. 10050. [Class 8 (ii)] A self-supporting gas filter material comprises a mixture of felted animal fibres and electrified particles of a substance having a specific volume resistivity greater than 10<17> ohms per cm. cube, and specific surface resistivity greater than 10<16> ohms per cm. square. Dry wool nails are mixed with a suitable resin carded, felted by rolling and electrically charged by being passed through bending rollers. Alternatively, a preformed felted mass of wool rails is impregnated. with a dispersion of resin, e.g. polystyrene, dried and charged by rolling. Cotton may be mixed with the wool fibres. Specification 573,951 is referred to.
GB1005045A 1945-04-20 1945-04-20 Improvements in or relating to gas filters Expired GB613915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1005045A GB613915A (en) 1945-04-20 1945-04-20 Improvements in or relating to gas filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1005045A GB613915A (en) 1945-04-20 1945-04-20 Improvements in or relating to gas filters

Publications (1)

Publication Number Publication Date
GB613915A true GB613915A (en) 1948-12-07

Family

ID=9960521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1005045A Expired GB613915A (en) 1945-04-20 1945-04-20 Improvements in or relating to gas filters

Country Status (1)

Country Link
GB (1) GB613915A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008530B (en) * 1952-01-03 1957-05-16 Fram Corp Gas filters, especially air filters for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008530B (en) * 1952-01-03 1957-05-16 Fram Corp Gas filters, especially air filters for internal combustion engines

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