BE517671A - - Google Patents
Info
- Publication number
- BE517671A BE517671A BE517671DA BE517671A BE 517671 A BE517671 A BE 517671A BE 517671D A BE517671D A BE 517671DA BE 517671 A BE517671 A BE 517671A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER88172D DE715188C (en) | 1933-06-21 | 1933-06-21 | Circuit arrangement for electron tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE517671A true BE517671A (en) |
Family
ID=7417921
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE406292D BE406292A (en) | 1933-06-21 | ||
| BE517671D BE517671A (en) | 1933-06-21 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE406292D BE406292A (en) | 1933-06-21 |
Country Status (2)
| Country | Link |
|---|---|
| BE (2) | BE517671A (en) |
| DE (1) | DE715188C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872832A (en) * | 1956-11-15 | 1959-02-10 | Appel Process Ltd | Plural workpiece forging machines |
| DE1111908B (en) * | 1956-08-16 | 1961-07-27 | Appel Process Ltd | Hammering machine for deforming workpieces using die tools |
| US3017793A (en) * | 1959-02-16 | 1962-01-23 | Appel Process Ltd | Forming tools, machines and methods |
-
0
- BE BE406292D patent/BE406292A/xx unknown
- BE BE517671D patent/BE517671A/xx unknown
-
1933
- 1933-06-21 DE DER88172D patent/DE715188C/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1111908B (en) * | 1956-08-16 | 1961-07-27 | Appel Process Ltd | Hammering machine for deforming workpieces using die tools |
| US2872832A (en) * | 1956-11-15 | 1959-02-10 | Appel Process Ltd | Plural workpiece forging machines |
| US3017793A (en) * | 1959-02-16 | 1962-01-23 | Appel Process Ltd | Forming tools, machines and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| BE406292A (en) | |
| DE715188C (en) | 1941-12-16 |