|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G08 |
SIGNALLING (indicating or display devices per se Fulltext... Hierarchy... Expanded...G09F; transmission of pictures Fulltext... Hierarchy... Expanded...H04N; arrangements for selective calling from one station to another Fulltext... Hierarchy... Expanded...H04Q 9/00)

|  | G08B |
SIGNALLING OR CALLING ARRANGEMENTS; ALARM ARRANGEMENTS (signalling arrangements on vehicles Fulltext... Hierarchy... Expanded...B60Q, Fulltext... Hierarchy... Expanded...B62D 41/00; railway signalling systems or devices Fulltext... Hierarchy... Expanded...B61L; on cycles Fulltext... Hierarchy... Expanded...B62J 3/00, Fulltext... Hierarchy... Expanded...B62J 5/00; signalling or alarm devices in mines Fulltext... Hierarchy... Expanded...E21F 17/18; lamps and shutters therefor Fulltext... Hierarchy... Expanded...F21; sensitive measuring elements, see the appropriate sub-classes of Fulltext... Hierarchy... Expanded...G01; traffic control systems Fulltext... Hierarchy... Expanded...G08G; visual indicating means Fulltext... Hierarchy... Expanded...G09; sound-producing devices Fulltext... Hierarchy... Expanded...G10, Fulltext... Hierarchy... Expanded...H04R; radio or near-field calling-systems Fulltext... Hierarchy... Expanded...H04B; arrangements for selective calling from one station to another Fulltext... Hierarchy... Expanded...H04Q 9/00)

|  | G08B |
Note(s) The term "arrangements" may cover also devices peculiar thereto. The mere provision of an audible or visible signalling device on measuring or switching apparatus is not included. This sub-class includes also means for identifying or incapacitating burglars or the like. Alarm arrangements for indicating that a specific variable has exceeded, or fallen below, a predetermined value are classified in the relevant sub-classes of class Fulltext... Hierarchy... Expanded...G01 for the measurement of that variable. Alarms for specific processes or types of machines or apparatus are classified in the relevant sub-classes for the processes, machines, or apparatus.

|  | G08B 1/00 |
Arrangements for signalling characterised solely by the form of transmission of the signal

|  | G08B 1/02 |
· | using only mechanical transmission

|  | G08B 1/04 |
· | using hydraulic transmission; using pneumatic transmission

|  | G08B 1/06 |
· · | hydraulic only

|  | G08B 1/08 |
· | using electric transmission

|  | G08B 3/00 |
Audible signalling arrangements or devices; Audible personal calling arrangements or devices (audible indication of time signals Fulltext... Hierarchy... Expanded...G04B 21/00; Fulltext... Hierarchy... Expanded...G04C 21/00)

|  | G08B 3/02 |
· | using only mechanical transmission

|  | G08B 3/06 |
· | using hydraulic transmission; using pneumatic transmission

|  | G08B 3/10 |
· | using electric transmission; using electromagnetic transmission

|  | G08B 3/14 |
· | using explosives

|  | G08B 5/00 |
Visible signalling arrangements or devices, e.g. personal calling arrangements or devices, remote indication of seats occupied (display of time signals Fulltext... Hierarchy... Expanded...G04B 19/00, Fulltext... Hierarchy... Expanded...G04C 17/00, Fulltext... Hierarchy... Expanded...G04C 19/00, Fulltext... Hierarchy... Expanded...G04G 9/00; for display of alphanumeric information Fulltext... Hierarchy... Expanded...G09F; flags, banners Fulltext... Hierarchy... Expanded...G09F)

|  | G08B 5/02 |
· | using only mechanical transmission

|  | G08B 5/06 |
· | using hydraulic transmission; using pneumatic transmission

|  | G08B 5/14 |
· · | with indicator element moving about a pivot, e.g. hinged flap, rotating vane

|  | G08B 5/16 |
· · · | with reset means necessitating a separate operation to return the indicator element

|  | G08B 5/18 |
· · | with indicator element moving rectilinearly

|  | G08B 5/20 |
· · · | with reset means necessitating a separate operation to return the indicator element

|  | G08B 5/22 |
· | using electric transmission; using electromagnetic transmission

|  | G08B 5/24 |
· · | with indicator element moving about a pivot, e.g. hinged flap, rotating vane

|  | G08B 5/26 |
· · · | with reset means necessitating a separate operation to return the indicator element

|  | G08B 5/28 |
· · · | with hinged flap or arm

|  | G08B 5/30 |
· · · | with rotating or oscillating members, e.g. vanes

|  | G08B 5/32 |
· · | with indicator element moving rectilinearly

|  | G08B 5/34 |
· · · | with reset means necessitating a separate operation to return the indicator element

|  | G08B 5/36 |
· · | using visible light sources

|  | G08B 5/38 |
· · · | using flashing light

|  | G08B 5/40 |
· | using smoke, fire, or coloured gases (sky-writing Fulltext... Hierarchy... Expanded...G09F 21/16)

|  | G08B 7/00 |
Signalling arrangements providing both audible and visible indication (combinations of display arrangements with audible advertising Fulltext... Hierarchy... Expanded...G09F 27/00); Personal calling arrangements providing both audible and visible indication

|  | G08B 7/02 |
· | using mechanical transmission

|  | G08B 7/04 |
· | using hydraulic transmission; using pneumatic transmission

|  | G08B 7/06 |
· | using electric transmission

|  | G08B 7/08 |
· | using explosives

|  | G08B 9/00 |
Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships (signalling devices in mines Fulltext... Hierarchy... Expanded...E21F 17/18)

|  | G08B 9/02 |
· | Details

|  | G08B 9/04 |
· · | Means for recording operation of the apparatus

|  | G08B 9/06 |
· · | Means for indicating disagreement between orders given and those carried out

|  | G08B 9/08 |
· | mechanical

|  | G08B 9/10 |
· · | using ratchet

|  | G08B 9/12 |
· · | using rotary shaft

|  | G08B 9/14 |
· | hydraulic; pneumatic

|  | G08B 9/16 |
· · | using ratchet

|  | G08B 9/18 |
· · | by varying displacement of the fluid

|  | G08B 9/20 |
· · | by varying pressure of the fluid

|  | G08B 11/00 |
( transferred to Fulltext... Hierarchy... Expanded...G08C, Fulltext... Hierarchy... Expanded...H04L )

|  | G08B 13/00 |
Burglar, theft, or intruder alarms (vehicle theft alarms Fulltext... Hierarchy... Expanded...B60R 25/10; cycle theft alarms Fulltext... Hierarchy... Expanded...B62H 5/00)

|  | G08B 13/02 |
· | Mechanical actuation

|  | G08B 13/04 |
· · | by breaking of glass

|  | G08B 13/06 |
· · | by tampering with fastening (alarm locks Fulltext... Hierarchy... Expanded...E05B 45/00; alarm devices on safes Fulltext... Hierarchy... Expanded...E05G 1/10)

|  | G08B 13/08 |
· · | by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind

|  | G08B 13/10 |
· · | by pressure on floors, floor coverings, stair treads, counters, or tills

|  | G08B 13/12 |
· · | by the breaking or disturbance of stretched cords or wires

|  | G08B 13/14 |
· · | by lifting or attempted removal of hand-portable articles

|  | G08B 13/16 |
· | Actuation by interference with mechanical vibrations in air or other fluid

|  | G08B 13/18 |
· | Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength

|  | G08B 13/20 |
· | Actuation by change of fluid pressure

|  | G08B 13/22 |
· | Electrical actuation

|  | G08B 13/24 |
· · | by interference with electromagnetic field distribution

|  | G08B 13/26 |
· · | by proximity of an intruder causing variation in capacitance or inductance of a circuit

|  | G08B 15/00 |
Identifying, scaring, or incapacitating burglars, thieves, or intruders, e.g. by explosives (burglar traps, etc. on safes Fulltext... Hierarchy... Expanded...E05G 5/02)

|  | G08B 15/02 |
· | with smoke, gas, or coloured or odorous powder or liquid

|  | G08B 17/00 |
Fire alarms; Alarms responsive to explosion (temperature-responsive elements Fulltext... Hierarchy... Expanded...G01K)

|  | G08B 17/02 |
· | Mechanical actuation of the alarm, e.g. by the breaking of a wire

|  | G08B 17/04 |
· | Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure

|  | G08B 17/06 |
· | Electric actuation of the alarm, e.g. using a thermally-operated switch (thermally-operated electric switches per se Fulltext... Hierarchy... Expanded...H01H 37/00)

|  | G08B 17/08 |
· | actuation involving the use of explosive means

|  | G08B 17/10 |
· | actuation by presence of smoke or gases

|  | G08B 17/12 |
· | actuation by presence of radiation or particles, e.g. of infra-red radiation, of ions

|  | G08B 19/00 |
Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow

|  | G08B 19/02 |
· | Alarm responsive to formation or anticipated formation of ice (indicating weather conditions Fulltext... Hierarchy... Expanded...G01W 1/00)

|  | G08B 21/00 |
Alarms responsive to a single specified undesired or abnormal operating condition and not elsewhere provided for

|  | G08B 23/00 |
Alarms responsive to unspecified undesired or abnormal conditions

|  | G08B 25/00 |
Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

|  | G08B 25/02 |
· | via a telephonic connection and using recorded signals, e.g. speech

|  | G08B 26/00 |
Alarm systems in which substations are interrogated in succession by a central station

|  | G08B 27/00 |
Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations

|  | G08B 29/00 |
Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation