GB440523A - Improvements in vacuum cleaners - Google Patents

Improvements in vacuum cleaners

Info

Publication number
GB440523A
GB440523A GB35217/34A GB3521734A GB440523A GB 440523 A GB440523 A GB 440523A GB 35217/34 A GB35217/34 A GB 35217/34A GB 3521734 A GB3521734 A GB 3521734A GB 440523 A GB440523 A GB 440523A
Authority
GB
United Kingdom
Prior art keywords
vacuum
dec
caused
vacuum cleaners
cleaner
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
GB35217/34A
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.)
Electrolux Household Appliances Ltd
Original Assignee
Electrolux Ltd
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 Electrolux Ltd filed Critical Electrolux Ltd
Publication of GB440523A publication Critical patent/GB440523A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/40—Circuit details for pick-up tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H04N5/40—Modulation circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Audible And Visible Signals (AREA)
  • Adjustable Resistors (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

440,523. Vacuum - cleaner filters. ELECTROLUX, Ltd., Luton, Bedfordshire.- (Assignees of Inventia Patent-Verwertungs- Ges. ; 20, Fronwaag Platz, Schaffhausen, Switzerland) Dec. 7, 1934, No. 35217. Convention date, Dec. 30, 1933. [Class 8 (ii)] In a vacuum cleaner, the increased local vacuum caused by clogging of the filter is caused to operate a diaphragm which acts directly on a pivoted loaded indicator 33 observed through a window 39.
GB35217/34A 1933-12-31 1934-12-07 Improvements in vacuum cleaners Expired GB440523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI48694D DE617417C (en) 1933-12-31 1933-12-31 Installation on vacuum cleaners provided with dust filters or dust bags and a display

Publications (1)

Publication Number Publication Date
GB440523A true GB440523A (en) 1936-01-01

Family

ID=25933917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35217/34A Expired GB440523A (en) 1933-12-31 1934-12-07 Improvements in vacuum cleaners

Country Status (3)

Country Link
DE (1) DE617417C (en)
FR (1) FR782776A (en)
GB (1) GB440523A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180905B (en) * 1962-05-04 1964-11-05 Siemens Elektrogeraete Gmbh Display device for the degree of clogging of a vacuum cleaner filter
DE69016608T2 (en) * 1989-11-27 1995-06-14 Matsushita Electric Ind Co Ltd Dust level indicator for vacuum cleaners.

Also Published As

Publication number Publication date
FR782776A (en) 1935-06-12
DE617417C (en) 1935-08-19

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