Can anyone help identify this device?

Old 08-11-19, 03:02 PM
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Can anyone help identify this device?

Name:  20190811_175622.jpg
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Size:  2.96 MBMy father was burglar alarm installer from the '80s on. I was recently going through some of his old tools, and found this device. When plugged in, it slowly blinks a bright light with an audible *click* accompanying each cycle. I believe it was used to calibrate photoelectric switches or the like, but don't know for sure.

Anyone seen this before? I'm really just looking to satisfy my curiosity. It is made by Arrowhead Enterprises.
Old 08-11-19, 03:09 PM
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Alignment light for photoelectric beam.
Old 08-11-19, 03:10 PM
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I recognize the Arrowhead. I don't think they're still in business although they seem to have a presence on linked in with 8 employees.

That looks like a 6v sealed beam. I've never seen that device before and can't really figure out how it would be used. Most of the photoelectric stuff was infra red.
Old 08-11-19, 03:23 PM
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Amazing, thank you! I did not expect such a quick response.
Old 08-11-19, 03:32 PM
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Modern photo electric beam devices have their own, built in, alignment mechanism, so it's something of a dead letter sort of tool.

Might be useful for a period piece film prop.
Old 08-12-19, 06:11 AM
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I used to use that exact model back in the day. I came across it recently while I was sorting through my junk.

@PJMax: We used them on IR beams by attaching them them to the transmitters and receivers in turn, and pointing the flashing light at the opposite beam device (xmtr or rec'r); then aiming the beam device lens of the opposite device at the flashing light. It was bright enough to stand out in daylight. Big and clunky, but an essential tool in the day.

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