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Aldis Lamp / Signal Lamp
Aldis Lamp / Signal Lamp
Published: 2008/04/01
Channel: nnorb
Batfish Submarine Signal Lamp International Morse Code
Batfish Submarine Signal Lamp International Morse Code
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A signalman aboard a US ship underway at sea sending blinker signal at night in t...HD Stock Footage
A signalman aboard a US ship underway at sea sending blinker signal at night in t...HD Stock Footage
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Channel: CriticalPast
TEXELCO signal lamp 180 series
TEXELCO signal lamp 180 series
Published: 2015/07/07
Channel: TEXELCO Srl
How to change mirror indicator, turn signal lamp or bulb in Toyota Auris / Corolla.
How to change mirror indicator, turn signal lamp or bulb in Toyota Auris / Corolla.
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Old railroad signal lamp.
Old railroad signal lamp.
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Channel: SpeakerFreak95extra
Make a Batman Signal Lamp from a cheap desk lamp
Make a Batman Signal Lamp from a cheap desk lamp
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Impala 2014-2018 Tail lamp/Signal lamp Change.
Impala 2014-2018 Tail lamp/Signal lamp Change.
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Channel: cjsworud1130
blinking light 2 \ signal light 3 \  signal lamp footage \  chroma key
blinking light 2 \ signal light 3 \ signal lamp footage \ chroma key
Published: 2017/04/07
Channel: badmadfatcat
HYUNDAI Signal lamp 현대 교통안전 신호등 : Aniframe
HYUNDAI Signal lamp 현대 교통안전 신호등 : Aniframe
Published: 2011/08/23
Channel: aniframe2001
iJDMTOY Universal Fit Sequential Switchback Daytime Running Light Turn Signal LED Strip
iJDMTOY Universal Fit Sequential Switchback Daytime Running Light Turn Signal LED Strip
Published: 2015/09/08
Channel: iJDMTOY.com Automotive LED
How to connect Car LED Lamp Tail Light with signal lights Strip for universal
How to connect Car LED Lamp Tail Light with signal lights Strip for universal
Published: 2017/08/11
Channel: Boy ka
blinking light 2 \ signal light 2 \  signal lamp green screen  footage \  chroma key
blinking light 2 \ signal light 2 \ signal lamp green screen footage \ chroma key
Published: 2017/04/07
Channel: badmadfatcat
How to turn a $10 Kmart lamp into a Batsignal!
How to turn a $10 Kmart lamp into a Batsignal!
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2001 Dodge Ram 1500  - Rear Turn Signal Lamp Replacement
2001 Dodge Ram 1500 - Rear Turn Signal Lamp Replacement
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Channel: Matt Payne
HIACE 4PCS TAIL LAMP SIGNAL LAMP RUNNING LED
HIACE 4PCS TAIL LAMP SIGNAL LAMP RUNNING LED
Published: 2017/11/13
Channel: Chien Chung Fang
blinking light \ signal light  \ signal lamp footage chroma key
blinking light \ signal light \ signal lamp footage chroma key
Published: 2017/04/07
Channel: badmadfatcat
iJDMTOY Afterburner LED Taillight Turn Signal Lamps For Yamaha ZUMA 125 BWs X Over Scooter
iJDMTOY Afterburner LED Taillight Turn Signal Lamps For Yamaha ZUMA 125 BWs X Over Scooter
Published: 2015/08/19
Channel: iJDMTOY.com Automotive LED
Day Running Light with signal lamp
Day Running Light with signal lamp
Published: 2014/09/29
Channel: Tdc variasi
2005 T&C Rear Turn Signal Lamp Replacement
2005 T&C Rear Turn Signal Lamp Replacement
Published: 2016/11/07
Channel: Jim Dandy
Bikeman Safety Warning R/C Signal Lamp Vest for Cycling - DX.com
Bikeman Safety Warning R/C Signal Lamp Vest for Cycling - DX.com
Published: 2014/09/28
Channel: DealeXtreme DV
NEW CAME signal lamp
NEW CAME signal lamp
Published: 2012/03/03
Channel: Дмитрий Зайцев
AUDI A6 2015 LED signal lamp
AUDI A6 2015 LED signal lamp
Published: 2015/09/29
Channel: 이준노
DIY Bat Sinal Luminária - Batman (Time Lapse)
DIY Bat Sinal Luminária - Batman (Time Lapse)
Published: 2017/09/22
Channel: Douglas Tonelli
2007 Infiniti FX Rear Signal Lamp Combination Module Part 1
2007 Infiniti FX Rear Signal Lamp Combination Module Part 1
Published: 2017/09/14
Channel: Will West
HONDA MOTOCOMPO Turn signal lamp Front
HONDA MOTOCOMPO Turn signal lamp Front
Published: 2014/09/23
Channel: kita compo
2007-2014 Ford F-150  Mirror Turn Signal Lamp Orange Genuine OEM New - AutoPartsCheaper.com
2007-2014 Ford F-150 Mirror Turn Signal Lamp Orange Genuine OEM New - AutoPartsCheaper.com
Published: 2015/04/08
Channel: AutoPartsCheaper
Mazda 6 front turn signal lamp mod.MPG
Mazda 6 front turn signal lamp mod.MPG
Published: 2011/09/13
Channel: Radius118
ET King Best Electric Bike Electric Scooter Front Lamp Signal Lamp Rear Lamp
ET King Best Electric Bike Electric Scooter Front Lamp Signal Lamp Rear Lamp
Published: 2017/09/21
Channel: Marshal Wang
Amber White LED For Harley Davidson Touring Bike Turn Signal Lamps
Amber White LED For Harley Davidson Touring Bike Turn Signal Lamps
Published: 2014/12/03
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Published: 2016/10/24
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Changing Rear Turn Signal Light Bulb/Lamp Hyundai Sonata
Changing Rear Turn Signal Light Bulb/Lamp Hyundai Sonata
Published: 2014/03/27
Channel: Richard Lloyd
2008 Dodge Caravan sideview mirror turn signal lamp replacement
2008 Dodge Caravan sideview mirror turn signal lamp replacement
Published: 2016/05/27
Channel: Ivan Nieto
LED turn Lamp and blue mirror turn signal lamp for Honda BRIO , AMAZE
LED turn Lamp and blue mirror turn signal lamp for Honda BRIO , AMAZE
Published: 2013/07/04
Channel: Sakura Part
How To Replace A Turn Signal Lamp - 2008 Dodge Ram 1500
How To Replace A Turn Signal Lamp - 2008 Dodge Ram 1500
Published: 2016/05/08
Channel: Matt Payne
Swedish Railway Kerosene Lamp
Swedish Railway Kerosene Lamp
Published: 2015/12/27
Channel: creativeobsin
side turn signal lamp/ luz direccional
side turn signal lamp/ luz direccional
Published: 2014/08/16
Channel: planetaprohibido
Station master old signal lamp - Bulgarian State Railways HD SlowMo
Station master old signal lamp - Bulgarian State Railways HD SlowMo
Published: 2013/03/21
Channel: cooltrainspotting
S25 LED Signal Lamp 2
S25 LED Signal Lamp 2
Published: 2011/08/25
Channel: ImperialConcept
Peugeot 3008 turn signal lamp
Peugeot 3008 turn signal lamp
Published: 2017/04/03
Channel: Seongil Kim
signal lamp
signal lamp
Published: 2012/01/12
Channel: Zakie Lutfi
Signal lamp of 4th Generation Ford Mondeo
Signal lamp of 4th Generation Ford Mondeo
Published: 2015/11/06
Channel: kenso77
Switchback 22-LED Daytime Running Lights Turn Signal Lamps For 2014-up Mazda3 Axela
Switchback 22-LED Daytime Running Lights Turn Signal Lamps For 2014-up Mazda3 Axela
Published: 2015/01/21
Channel: iJDMTOY.com Automotive LED
ANSMANN FUTURE Multi 3in1 - focusable torch, work lamp & signal lamp
ANSMANN FUTURE Multi 3in1 - focusable torch, work lamp & signal lamp
Published: 2016/09/12
Channel: ansmannAG
valenti japan LED turn signal LAMP
valenti japan LED turn signal LAMP
Published: 2009/11/01
Channel: tonnychang1
BMW 320D(F30) LED signal lamp / 깜빡이 교체
BMW 320D(F30) LED signal lamp / 깜빡이 교체
Published: 2015/09/15
Channel: 최보규
Seibu Wire EDM - Exterior Signal Lamp
Seibu Wire EDM - Exterior Signal Lamp
Published: 2015/08/24
Channel: KGK International Corp.
Bicycle Turn Signal Brake LED Light and Lamp Directional Control Switches [300214]
Bicycle Turn Signal Brake LED Light and Lamp Directional Control Switches [300214]
Published: 2013/06/15
Channel: TinyBuying
XJ6 signal lamp
XJ6 signal lamp
Published: 2013/04/30
Channel: buana07
LED rear turning signal lamp
LED rear turning signal lamp
Published: 2008/11/02
Channel: KJ2009
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from Aldis lamp)
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Signal lamp training during World War II.

A signal lamp (sometimes called an Aldis lamp, after Arthur Cyril Webb Aldis who invented a widely used design, or a Morse lamp[1]) is a visual signaling device for optical communication, typically using Morse code. Modern signal lamps are focused lamps which can produce a pulse of light. In large versions, this pulse is achieved by opening and closing shutters mounted in front of the lamp, either via a manually operated pressure switch or, in later versions, automatically. With hand held lamps, a concave mirror is tilted by a trigger to focus the light into pulses. The lamps were usually equipped with some form of optical sight, and were most commonly used on naval vessels and in airport control towers (using color signals for stop or clearance).

Marine usage[edit]

US Navy sailor sending Morse code using a signal lamp.

Signal lamps were pioneered by the British Royal Navy in the late 19th century and continue to be used through the present day, on naval vessels. They provide handy, secure communications, which is especially useful during periods of radio silence and were particularly useful for convoys operating during the Battle of the Atlantic.

There are several types. Some signal lamps are mounted on the mastheads of ships, some small hand-held versions are also used (e.g., the 'Aldis lamp'); other more powerful versions are mounted on pedestals. These larger ones use a carbon arc lamp as their light source, with a diameter of 20 inches (50 cm). These can be used to signal to the horizon, even in conditions of bright sunlight. Although it was originally thought that it was only possible to communicate by line-of-sight, in practice it is possible to illuminate cloud bases both during the night and day, which allow for communication beyond the horizon.

The maximum transmission rate possible via flashing lights is no more than 14 wpm. They have a secondary function as simple spotlights.

Early history[edit]

Begbie signalling oil lamp, 1918

The idea of flashing dots and dashes from a lantern was first put into practice by Captain, later Vice Admiral, Philip Colomb, of the British Royal Navy, in 1867. His original code, which the Navy used for seven years, was not identical with Morse's, but Morse code was eventually adopted with the addition of several special signals.

Another signalling lamp was the Begbie lamp, a kerosene lamp with a lens to focus the light over a long distance.[2]

Flashing lights were the second generation of signalling in the Royal Navy, after the flag signals most famously used to spread Nelson's rallying-cry before the Battle of Trafalgar.

WW I German Blinkgerät

During the trench warfare of World War I when wire communications were often cut, German signals used three types of optical Morse transmitters, called Blinkgerät, the intermediate type for distances of up to 4 km (2.5 miles) at daylight and of up to 8 km (5 miles) at night, using red filters for undetected communications.[citation needed]

A Blinkgerät can be seen second from the left in this picture of an Ottoman heliograph crew.

Modern use[edit]

The Commonwealth Navies and NATO forces use signal lamps when radio communications need to be silent or electronic "spoofing" is likely. Also, given the prevalence of night vision equipment in today's armed forces, signaling at night is usually done with lights that operate in the infrared (IR) spectrum, making them less likely to be detected. All modern forces have followed suit due to technological advances in digital communications.[3]

Air traffic control usage[edit]

In air traffic control towers, signal lamps are still used today, as a backup device in case of a complete failure of an aircraft's radio. Light signals can be green, red, or white, and steady or flashing. Messages are limited to a handful of basic instructions (e.g., "land", "stop", etc.); they are not intended to be used for transmitting messages in Morse code. Aircraft can acknowledge signals by rocking their wings or flashing their landing lights.[4]

See also[edit]

References[edit]

External links[edit]

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