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2. List of keyboard switches - Wikipedia

   en.wikipedia.org/wiki/List_of_keyboard_switches

   Commonly used mechanical switches on pre-built keyboards [ edit ] Manufacturers frequently build computer keyboards using switches from original equipment manufacturers (OEMs).

3. Intrinsic safety - Wikipedia

   en.wikipedia.org/wiki/Intrinsic_safety

   Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy, electrical and thermal, available for ignition. In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over ...

4. Electrical equipment in hazardous areas - Wikipedia

   en.wikipedia.org/wiki/Electrical_equipment_in...

   Equipment can be designed or modified for safe operation in hazardous locations. The two general approaches are: Intrinsic safety Intrinsic safety, also called non-incendive, limits the energy present in a system, such that it is insufficient to ignite a hazardous atmosphere under any conditions. This includes both low power levels, and low ...

5. Inherent safety - Wikipedia

   en.wikipedia.org/wiki/Inherent_safety

   (Kletz originally used the term intrinsically safe in 1978, but as this had already been used for the special case of electronic equipment in potentially flammable atmospheres, only the term inherent was adopted. Intrinsic safety may be considered a special subset of inherent safety). In 2010 the American Institute of Chemical Engineers ...

6. Foundation Fieldbus H1 - Wikipedia

   en.wikipedia.org/wiki/Foundation_Fieldbus_H1

   The Foundation Fieldbus H1 has support for Intrinsically Safe Wiring. Unlike other protocols, FOUNDATION H1 provides explicit synchronization of control and communication for precisely periodic (isochronous) communication and execution of control functions with minimized dead time and jitter.

7. Advanced Physical Layer - Wikipedia

   en.wikipedia.org/wiki/Advanced_Physical_Layer

   For this reason, optional intrinsic safety is fully integrated into the definitions of the Ethernet-APL communication standard. In the technical specification 2-WISE [3] the 2-wire intrinsically safe Ethernet is defined. The intrinsic safety barrier is an electronic circuit at each output or input of a switch or instrument. It prevents ...

8. List of IEC technical committees - Wikipedia

   en.wikipedia.org/wiki/List_of_IEC_technical...

   Switches for appliances SC 23K Electrical Energy Efficiency products TC 25: Quantities and units TC 26 Electric welding TC 27: Industrial electroheating and electromagnetic processing TC 28 Insulation co-ordination TC 29 Electroacoustics TC 31 Equipment for explosive atmospheres SC 31G Intrinsically-safe apparatus SC 31J

9. Buckling spring - Wikipedia

   en.wikipedia.org/wiki/Buckling_spring

   A buckling spring is a type of keyswitch mechanism, popularized by IBM's keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keyboards (for instance the AT keyboard), and the more common Model M. It is described in U.S. patent 4,118,611 (Model F) and U.S. patent 4,528,431 (Model M), both now ...