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 capable only of dealing with binary digits G06K; circuits for coupling output of reproducer to radio receiver H04B 1/20; 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;(b) record carriers for use with such apparatus and machines; (c) 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 recorded information.

 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 bits of 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 bits of 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.