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Signalman from Detective Comics vol. 1 #466,
artist Ernie Chan
|First appearance||Batman vol. 1 #112,
|Created by||Bill Finger (writer)
Sheldon Moldoff (artist)
|Alter ego||Phillip "Phil" Cobb|
|Team affiliations||Secret Society of Super Villains|
|Notable aliases||Blue Bowman|
|Abilities||Reasonably skilled hand to hand combatant
Wields various items like a signal altering belt
Fictional character biography
Phillip "Phil" Cobb was a gangster with big ideas. He came to Gotham City intent on hiring a gang of his own and making it big, only to be laughed at when he tried to recruit the gang because he had no reputation. Steaming with anger, he vowed to prove himself to Gotham's mobsters, and when he noticed how modern society was regulated by signs, signals and symbols, he found the inspiration for his criminal career. Becoming the Signalman, he went on a spectacular crime spree using those signs and symbols as his motif.
Ultimately captured by Batman and Robin, he returned for a rematch a year later in Batman #124,  and then switched gears and became the Green Arrow-copycat called the Blue Bowman in Batman #139. After that, he remained unseen until 1976, when he resumed his Signalman guise in Detective Comics #466. This time, he actually managed to trap the Batman inside the Batsignal. 
In the pages of Identity Crisis, it is mentioned Signalman was kidnapped by Doctor Moon and Phobia, a fact confirmed in the pages of the Manhunter, which depicts his torture and seeming death via a video recording.
In The New 52 (a reboot of the DC Comics universe), Signalman appears as a member of the Secret Society. When Catwoman breaks out of Arkham Asylum, Signalman and Blockbuster confront Catwoman on the rooftop which ended with Catwoman being knocked out.
During the "Trinity War" storyline, Signalman is sent with Giganta and Vandal Savage into tracking Pandora. After Pandora successfully subdues Giganta, Signalman realizes that Pandora is more parahuman than originally thought.
Powers and abilities
Signalman has no superhuman powers but he is a reasonably skilled hand-to-hand combatant. He also carries items such as a knockout-gas gun, miniature flares that cause fires, electric "sparks" capable of controlling the signals to the human brain, and a remote-control device in his belt that alters signals of an electronic nature.
- In the Kingdom Come miniseries, there is a background character named Signalwoman. The left side of her face is completely covered in tattoos, including her shaved head (The tattoos match the symbols on the original's costume).
- In the Batman Beyond universe, an elderly and retired Signalman is murdered in a manner reminiscent of Two-Face, stabbed twice in the heart and throat. After his corpse is discovered in his apartment by the new Batman, Terry McGinnis, Bruce Wayne mentions that he had gone to prison years earlier and had turned his life around upon his release.
In other media
- Signalman makes an appearance in the Batman: The Brave and the Bold episode "A Bat Divided." He is seen hanging out with the bad guys at a bar until Firestorm and the three Batmen show up.
- Batman #124
- Batman #139
- Batman #466
- Justice League of America #195
- Justice League of America #196
- Justice League of America #197
- Justice League of America #1
- Final Crisis #1
- Justice League of America Vol. 3 #3
- Trinity of Sin: Pandora #2
- Batman Beyond vol. 2 #1