BE471817A - - Google Patents
Info
- Publication number
- BE471817A BE471817A BE471817DA BE471817A BE 471817 A BE471817 A BE 471817A BE 471817D A BE471817D A BE 471817DA BE 471817 A BE471817 A BE 471817A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
- H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
- H03K4/28—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device
- H03K4/32—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device combined with means for generating the driving pulses
- H03K4/34—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device combined with means for generating the driving pulses using a single tube with positive feedback through a transformer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
- E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
- E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL259272X | 1946-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE471817A true BE471817A (xx) |
Family
ID=19781437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE471817D BE471817A (xx) | 1946-03-14 |
Country Status (7)
Country | Link |
---|---|
US (1) | US2512543A (xx) |
BE (1) | BE471817A (xx) |
CH (1) | CH259272A (xx) |
DE (1) | DE968968C (xx) |
FR (1) | FR943079A (xx) |
GB (1) | GB643152A (xx) |
NL (1) | NL69035C (xx) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2710353A (en) * | 1949-02-28 | 1955-06-07 | Hartford Nat Bank & Trust Co | Blocking oscillator |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2143366A (en) * | 1935-12-03 | 1939-01-10 | Telefunken Gmbh | Serrated wave form generator |
US2265620A (en) * | 1938-11-30 | 1941-12-09 | Bahring Herbert | Scanning current generator |
DE747344C (de) * | 1939-05-27 | 1944-09-27 | Telefunken Gmbh | Schaltungsanordnung zur Erzeugung saegezahnfoermiger Stromkurven in einer Drosselspule |
DE907812C (de) * | 1944-06-28 | 1954-03-29 | Fernseh Gmbh | Verfahren und Anordnung zum Betrieb von Kippgeraeten mit verringerter Leistungsaufnahme |
-
0
- NL NL69035D patent/NL69035C/xx active
- BE BE471817D patent/BE471817A/xx unknown
-
1947
- 1947-03-11 US US733910A patent/US2512543A/en not_active Expired - Lifetime
- 1947-03-11 GB GB6785/47A patent/GB643152A/en not_active Expired
- 1947-03-12 FR FR943079D patent/FR943079A/fr not_active Expired
- 1947-03-13 CH CH259272D patent/CH259272A/de unknown
-
1948
- 1948-11-05 DE DEP20810A patent/DE968968C/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR943079A (fr) | 1949-02-25 |
NL69035C (xx) | |
CH259272A (de) | 1949-01-15 |
DE968968C (de) | 1958-04-10 |
GB643152A (en) | 1950-09-15 |
US2512543A (en) | 1950-06-20 |