switch interlock
21Safety (firearms) — This article is about the mechanical safety devices built into most firearms. For the main article about firearm safety education, see Gun safety. Close up shot of a safety of an M16A2 rifle. In firearms, a safety or safety catch is a mechanism… …
22Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
23Roto-frank roof windows — is a defunct division of Roto Frank that manufactured electrically operated roof windows (skylights). The division was sold to Insuladome in mid 2005.HistoryRoto Frank began roof window manufacturing in 1968. The company s core business is in… …
24Programmable logic controller — A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. PLCs are used in many different industries and machines… …
25Holga — Infobox Camera camera model = Holga manufacturer = Various camera type = Box camera sensor type = Film sensor size = 56 mm × 56 mm recording medium = 120 film lens system = 60 mm plastic meniscus focus type = Manual zone (four settings)… …
26Switchgear — The term switchgear, used in association with the electric power system, or grid, refers to the combination of electrical disconnects, fuses and/or circuit breakers used to isolate electrical equipment. Switchgear is used both to de energize… …
27Manual transmission — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic …
28Delay box — is a common slang term used in drag racing to describe an on board timer which is a Transmission Brake Delay Timer. A transbrake forces the race car to remain stationary at the starting line, in gear, regardless of how much engine power is… …
29Disconnector — In electrical engineering, a disconnector or isolator switch is used to make sure that an electrical circuit can be completely de energised for service or maintenance. Such switches are often found in electrical distribution and industrial… …
30Fail-safe — or fail secure describes a device or feature which, in the event of failure, responds in a way that will cause no harm or at least a minimum of harm to other devices or danger to personnel. Definitions*“A device that will provide its intended… …
