Manual of U.S. Patent Classification
as of June 30, 2000

Class
218
HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

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Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES
		This Class 218 is considered to be an integral part of Class 200 (see the Class 200 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 200.
1		ARC PREVENTING OR EXTINGUISHING DEVICES
2		. Multiple break
3		. . Hybrid-type
4		. . Series connected break
5		. . Simultaneous break
6		. . Sequential break
7		. . Operating mechanism structure or arrangement
8		. Auxiliary shunt
9		. . Polyphase
10		. . Vacuum switch
11		. . Tubular shaped
12		. . Disconnect switch
13		. . Gas type
14		. . Operating mechanism structure or arrangement
15		. . Arc chute assembly
16		. . Contact structure
17		. . . Movable contact assembly
18		. . . . Arcing contact
19		. . . . Movable contact assembly reciprocates
20		. . . . Movable contact assembly pivots
21		. . . . . Arcing contact pivots relative to movable main contact assembly
22		. Magnetic blowout
23		. . Permanent magnet
24		. . . Magnetic yoke structure
25		. . . Located outside switch housing
26		. . . Located inside switch housing
27		. . . Connected to contact
28		. . . Plural coils
29		. . Arc Spinner
30		. . Contact structure
31		. . . Bridging contacts
32		. . . Pivot
33		. . . Reverse looped or flexible stationary contact
34		. . Arc chute
35		. . . With vent means
36		. . . Arc runner (e.g., arc horn)
37		. . . Insulated conductor structure
38		. . . . Arc splitting means
39		. . . . Skew, parallel, or vertical position
40		. . Arc runner (e.g., arc horn)
41		. . Barrier
42		. . Within vacuum
43		. Air-current blowout
44		. . Polyphase
45		. . Disconnect switch
46		. . Arcing chamber
47		. . . Plural chambers
48		. . Contact structure
49		. . . Fixed
50		. . . Movable
51		. . With gas flow means
52		. . . Exhaust port
53		. . With nozzle
54		. . . With throat region
55		. . Grounding switch
56		. . Self extinguishing
57		. . Puffer piston
58		. . . Polyphase
59		. . . With gas blast means
60		. . . . Piston structure
61		. . . . Compressing cylinder structure
62		. . . . . With nozzle
63		. . . With nozzle
64		. . . . With throat region
65		. . . Contact structure
66		. . . Valve (e.g., blast valve or pressure relief valve)
67		. . . Disconnect switch
68		. . Sealed chamber
69		. . . Plural switch connected in series
70		. . . . Hybrid-type
71		. . . Polyphase
72		. . . With nozzle
73		. . . . With throat region
74		. . . Contact structure
75		. . . Busbar
76		. . . Arcing chamber
77		. . . Shielding
78		. . . Operating mechanism structure or arrangement
79		. . . Grounding switch
80		. . . Disconnect switch
81		. . Arc chute
82		. . Identical units back-to-back
83		. . Recirculating systems
84		. . Operating mechanism structure or arrangement
85		. . Arc extinguishing medium
86		. . Low pressure cut-off valve means
87		. . Magnetic synchronous contacts
88		. . Control of blast valve and contacts
89		. Interposed non-conductor
90		. . Gas-evolving chamber
91		. . Liquid
92		. . . Operating mechanism structure or arrangement
93		. . . . Piston
94		. . . . Delay means (e.g., dashpot)
95		. . . . Chemical explosive primer
96		. . . . With oil flow feature
97		. . . Housing or tank structure
98		. . . . With raising and lowering means
99		. . . . With venting means
100		. . . Disconnect switch
101		. . . Polyphase
102		. . . With resistor
103		. . . Arcing chamber
104		. . . . Including magnet or coil
105		. . . . Grid or baffle stack
106		. . . . With venting means
107		. . . Contact structure
108		. . . . Movable
109		. . . Valve (e.g., spring biased valve plate)
110		. . . Bridging contacts
111		. . . Explosion pot
112		. . . Oil poor breaker
113		. . . Rotary contact
114		. . . Pressure generating arc control means
115		. . . . Plural series connected
116		. . . Puffer-piston
117		. . Solid
118		. Vacuum
119		. . Polyphase
120		. . . Operating mechanism structure or arrangement
121		. . Single-pole
122		. . . Pressure monitoring means
123		. . . Contact structure
124		. . . . Movable
125		. . . . Fixed
126		. . . . Auxiliary
127		. . . . Significant shape
128		. . . . . Slotted or grooved
129		. . . . . Coil
130		. . . . Specific material
131		. . . . . Getter
132		. . . . . Alloy
133		. . . . . Beryllium
134		. . . Housing structure
135		. . . . Bellows
136		. . . . Shielding
137		. . . . . With support
138		. . . . Potted or encapsulated
139		. . Housing structure
140		. . Operating mechanism structure or arrangement
141		. . With magnetic coil
142		. . . Located inside housing
143		. Resistance inserting
144		. . With capacitor
145		. With capacitor
146		. Contact structure
147		. . Arc shielding means
148		. Arc runner (e.g., arc horn)
149		. Arc chute assembly
150		. . Material
151		. . Metal plates structure
152		. Polyphase
153		. . Operating mechanism structure or arrangement
154		. Operating mechanism structure or arrangement
155		. Housing structure
156		. . Arcing chamber
157		. . . With venting means
158		. . . Arc extinguishing material

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Last Modified: 6 October 2000