signal bulb
1Signal arrow — Kabura ya (鏑矢), also called kōshi (嚆矢), were Japanese arrows which whistled when fired and were used in ritual archery exchanges prior to formal medieval battles. The sound was created by a specially carved or perforated bulb of deer horn or wood …
2Olfactory bulb — Brain: Olfactory bulb Vesalius Fabrica, 1543. Olfactory Bulbs and Olfactory tracts outlined in red …
3Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …
4Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… …
5Bat-Signal — Infobox comics elements name = Bat Signal imagesize = caption = The Gotham City Police Department with the Bat Signal. Cover of Gotham Central #1. Art by Michael Lark. publisher = DC Comics debut = Detective Comics #60 (February 1942) creators =… …
6Traffic signal preemption — is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles.[1][2] The most common use of these systems is to manipulate traffic signals in the path of an emergency vehicle, stopping… …
7Monon Railroad — Reporting mark CIL, MON Locale Illinois, Indiana and Kentucky Dates of operation 1847–1971 S …
8List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …
9Automotive lighting — Blinker redirects here. For other uses, see Blinker (disambiguation). Not to be confused with Magneti Marelli company AL Automotive Lighting. For lights in seafaring and aviation, see navigation light. The lighting system of a motor vehicle… …
10North American railroad signals — Main article: North American railway signaling Baltimore and Ohio Railroad Color Position Light bracket masts at Magnolia, West Virginia North American railroad signals generally fall into the category of multi headed electrically lit units… …
