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
  • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
  • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
  • A47L9/1436—Connecting plates, e.g. collars, end closures
  • A47L9/1445—Connecting plates, e.g. collars, end closures with closure means
  • A47L9/1454—Self-sealing closures, e.g. valves
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
  • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
  • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
  • H03B5/26—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Filters For Electric Vacuum Cleaners (AREA)
• Bag Frames (AREA)
• Vacuum Packaging (AREA)
• Refuse Collection And Transfer (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=24574705

Family Applications (1)

Country Status (7)

Families Citing this family (21)

Family Cites Families (15)

• 0
  • NL NL70292D patent/NL70292C/xx active
  • BE BE470437D patent/BE470437A/xx unknown
• 1946
  • 1946-01-18 US US641992A patent/US2596806A/en not_active Expired - Lifetime
• 1947
  • 1947-01-01 GB GB56/47A patent/GB629674A/en not_active Expired
  • 1947-01-02 FR FR939472D patent/FR939472A/fr not_active Expired
  • 1947-01-09 CH CH258822D patent/CH258822A/fr unknown
• 1948
  • 1948-11-30 DE DEP23065A patent/DE886803C/de not_active Expired

Also Published As

Similar Documents