Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts (time or time-programme switches H 01 H 43/00)
7
/
02
•
with fluid timing means
7
/
03
•
•
with dash-pots
7
/
04
•
•
with flies, i.e. fan governors
7
/
06
•
with thermal timing means (thermally-actuated switches H 01 H 37/00)
7
/
08
•
with timing by mechanical speed-control devices
7
/
10
•
•
by escapement
7
/
12
•
•
•
mechanical
7
/
14
•
•
•
electromagnetic
7
/
16
•
Devices for ensuring operation of the switch at a predetermined point in the ac cycle (circuit arrangements H 01 H 9/56)
Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H 02 B 1/26)
9
/
04
•
•
Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
9
/
06
•
•
Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
9
/
08
•
Arrangements to facilitate replacement of switch, e.g. cartridge housing
9
/
10
•
Adaptation for built-in fuses (mounting switch and fuse separately on, or in, common support H 02 B)
9
/
12
•
Means for earthing parts of switch not normally conductively connected to the contacts
9
/
14
•
Adaptation for built-in safety spark gaps
9
/
16
•
Indicators for switching condition, e.g. "on" or "off"
9
/
18
•
Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
9
/
20
•
Interlocking, locking, or latching mechanisms (contacts adapted to act as latches
H 01 H 1/52; by an auxiliary movement of the operating part or of an attachment thereto H 01 H 3/20)
9
/
22
•
•
for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
9
/
24
•
•
for interlocking two or more parts of the mechanism for operating contacts
9
/
26
•
•
for interlocking two or more switches (by a detachable member H 01 H 9/28)
9
/
28
•
•
for locking switch parts by a key or equivalent removable member (switches operated by a key H 01 H 27/00; locking by removable part of two-part coupling device H 01 R)
9
/
30
•
Means for extinguishing or preventing arc between current-carrying parts
9
/
32
•
•
Insulating body insertable between contacts
9
/
34
•
•
Stationary parts for restricting or subdividing the arc, e.g. barrier plate
9
/
36
•
•
•
Metal parts
9
/
38
•
•
Auxiliary contacts on to which the arc is transferred from the main contacts (using arcing-horns H 01 H 9/46)
9
/
40
•
•
Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
