GB539810A - Improvements in or relating to apparatus for reading records and in communication systems - Google Patents

Improvements in or relating to apparatus for reading records and in communication systems

Info

Publication number
GB539810A
GB539810A GB5378/40A GB537840A GB539810A GB 539810 A GB539810 A GB 539810A GB 5378/40 A GB5378/40 A GB 5378/40A GB 537840 A GB537840 A GB 537840A GB 539810 A GB539810 A GB 539810A
Authority
GB
United Kingdom
Prior art keywords
cathode
scanning
ray
record
signals
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
GB5378/40A
Other languages
English (en)
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.)
British Tabulating Machine Co Ltd
Original Assignee
British Tabulating Machine Co 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 British Tabulating Machine Co Ltd filed Critical British Tabulating Machine Co Ltd
Publication of GB539810A publication Critical patent/GB539810A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3218—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators for flexible or elastic containers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)
  • Recording Measured Values (AREA)
GB5378/40A 1939-03-25 1940-03-23 Improvements in or relating to apparatus for reading records and in communication systems Expired GB539810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US539810XA 1939-03-25 1939-03-25

Publications (1)

Publication Number Publication Date
GB539810A true GB539810A (en) 1941-09-24

Family

ID=21987892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5378/40A Expired GB539810A (en) 1939-03-25 1940-03-23 Improvements in or relating to apparatus for reading records and in communication systems

Country Status (4)

Country Link
DE (1) DE747446C (enrdf_load_stackoverflow)
FR (1) FR866078A (enrdf_load_stackoverflow)
GB (1) GB539810A (enrdf_load_stackoverflow)
NL (2) NL97373B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096100B (de) * 1952-06-25 1960-12-29 Ibm Deutschland Einrichtung zum zeilenweisen Abfuehlen von Aufzeichnungstraegern mittels eines Elektronenstrahls
BE539569A (enrdf_load_stackoverflow) * 1954-07-06

Also Published As

Publication number Publication date
NL222556A (enrdf_load_stackoverflow)
DE747446C (de) 1945-01-11
FR866078A (fr) 1941-06-16
NL97373B (enrdf_load_stackoverflow)

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