G
SECTION G — PHYSICS
  
INSTRUMENTS
 G11
INFORMATION STORAGE
 G11B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D; photochemical processing of recordings G03C; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards, G06K; transferring data from one type of record carrier to another G06K 1/18; printing of data from record carriers G06K 3/00; arrangements for producing a permanent visual presentation of the output data G06K 15/00; arrangements or circuits for control of indicating devices using static means to present variable information G09G; transmission of digital data between dynamic and static stores G11D; circuits for coupling output of reproducer to radio receiver H04B 1/20; circuits specially adapted for television signal recording H04N 5/76, H04N 9/491; electromechanical transducers and circuits therefor H04R)
 G11B

Note(s)

  1. This sub-class deals with the recording and playback of information by relative movement between a record track and a transducer, the transducer directly producing, or being directly actuated by, modulation in the track being recorded or played-back, and the extent of modulation corresponding to the signal being recorded or played-back.
  2. This sub-class includes
    1. apparatus and machines for recording or playback, and parts thereof, such as heads;
    2. record carriers for use with such apparatus and machines;
    3. associated working of other apparatus with such apparatus and machines.
  3. In this sub-class:
    1. The term "head" includes any means for converting sinusoidal or non-sinusoidal electric wave-forms into variations of the physical condition of at least the adjacent surface of the record carrier, or vice versa.
    2. A record carrier is understood to be a body, such as a cylinder, disc, card, tape, or wire, capable of permanently holding information, which can be read-off by a sensing element movable relatively to the record carrier.

 G11C
STATIC STORES (recording and playback of information by relative movement between a record track and a transducer G11B; pulse technique in general H03K, e.g. electronic switches H03K 17/00)
 G11C

Note(s)

  1. This sub-class deals with devices or arrangements for storage of digital or analogue information:
    1. in which no relative movement takes place between an information storage element and a transducer;
    2. which incorporate a selecting-device for writing-in or reading-out the information into or from the store.
  2. In this sub-class, a storage element is provided with means for writing-in and reading-out at least one item of information. Elements not adapted for storage and not provided with such means are classified in the appropriate sub-class, e.g. of H01, H03K.

 G11D
TRANSMISSION OF DIGITAL DATA BETWEEN DYNAMIC AND STATIC STORES (transmission of digital data between dynamic stores only G11B, between static stores only G11C 9/00)  [2]