I found this old tool, I'd like more information about it.

[JuggaloCujo]

It has a sticker that reads Black and Decker U100 1/4" Utility drill volts-115 ACAmps- 1.9 HP 1/7
RPM 2250
Here's the kicker, it's a drill with a circular saw attached to it.
The body of the drill is silver, the handle is black, the trigger lock is Orange, the circular saw hosing is teal green/blue (like Makita) the cord is gray, the plug is black.
It has the original store sticker on it from "L&S Lumber Inc. Hoosick Falls, N.Y."

[JuggaloCujo]

http://lh3.ggpht.com/-0zgiDCGTt04/VEiFtNyiBxI/AAAAAAAAALU/ugKU0GpiLCE/s1280/1414038584985.jpg

[JuggaloCujo]

https://picasaweb.google.com/113573362963506503994/ProfilePhotos#6073251007247612626

[JuggaloCujo]

http://lh4.ggpht.com/-5pqYVgM-rLw/VEiFjmRBkcI/AAAAAAAAALE/PAaJdCpsiEc/s1280/1414037934520.jpg

[oldgoaly]

What you have there is a circular saw attachment to turn a drill into a saw, The drill is newer than the attachment.

[Bill Houghton]

To add to what oldgoaly said, in the 1950s there were lots of these things offered.  Motors had become far more compact due to development work done during World War II, and the tool companies were offering lots of choices; but many families were operating on tight budgets (in many families, it was a Big Deal to get a car).  So some inspired geniuses decided to make these attachments, figuring the homeowner could afford a drill, and the attachments were then cheaper than buying a circular saw, saber/bayonet/jig saw, etc.

They do work, but generally not well.  They tend to be underpowered, and the ergonomics are not the best.  I fooled around with the circular saw attachment I picked up at a yard sale, and yes, it would cut 1x stock; but more slowly than a handsaw would.  That hasn't stopped me from buying a couple of other attachments as I find them, just because they're interesting; but I don't expect ever to use them.