BE483071A - - Google Patents

Info

Publication number: BE483071A
Authority: BE; Belgium

Application number

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.)

1942-10-06

Publication of BE483071A publication Critical patent/BE483071A/xx

Classifications

- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/0206—Hydraulically operated extension devices
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
- H04L13/02—Details not particular to receiver or transmitter
- H04L13/10—Distributors
- H04L13/12—Non-mechanical distributors, e.g. relay distributors
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/202—Repeater circuits; Relay circuits using mechanical devices
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/205—Repeater circuits; Relay circuits using tuning forks or vibrating reeds

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Power Engineering (AREA)
Mining & Mineral Resources (AREA)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Geology (AREA)
Relay Circuits (AREA)
Interface Circuits In Exchanges (AREA)

BE483071D 1942-10-06 BE483071A (mo)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL283927X		1942-10-06

Publications (1)

Publication Number	Publication Date
BE483071A true BE483071A (mo)

Family

ID=19782417

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE483071D BE483071A (mo)	1942-10-06

Country Status (4)

Country	Link
BE (1)	BE483071A (mo)
CH (1)	CH283927A (mo)
DE (1)	DE885561C (mo)
NL (1)	NL58845C (mo)

0
- NL NL58845D patent/NL58845C/xx active
- BE BE483071D patent/BE483071A/xx unknown
1947
- 1947-12-19 CH CH283927D patent/CH283927A/fr unknown
1950
- 1950-06-07 DE DEST1232A patent/DE885561C/de not_active Expired

Also Published As

Publication number	Publication date
DE885561C (de)	1953-08-06
CH283927A (fr)	1952-06-30
NL58845C (mo)

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