





Geez, and here I thought I searched for Runge, HJJ and H.J.J. before I posted as “completely new to me”. Guess I need pictures to tell the story.The one I have (Post #16 up-thread) measures 7 inches stem to stern, all metal, and is labeled 'Patent Pending' so using the patent you found apparently dates from between the wars. Thanks for that info, I've been wondering about it's age.
The function is exactly as you found: Push a screw on to grip and press the back button to reset for another screw.
Two years ago HJJ company was still active but now as you noted the website is for sale and the phone number is disconnected.
Joe



My similar Vaco G2 is still functional. The little blade in the middle rotates to grip the screw slot.



I’d say a good purchase you won’t regret making.Picked up the NOS set of quick wedge screwdrivers with original brochure and holder at my local pawn shop for $25.
-Tommy
d42jeep said:"... just the patent number ..."







You do that kind of screw starter....and you'll find alot of little drivers!
Here's my wooden handle Millen Mfg Co "Jiffy Tite". Rough condition, and a bit difficult to read the Mfr and patent No. details on the ferrule without using a magnifier. I like the knurled slider.one I have not seen mentioned here in this thread is the Millen Mfg. Co. of Boston and their "Jiffy-Tite" screw starter (patent 1699306)


You'd use a concave faced knurling tool instead of the usual flat face tools. Hammacher Schlemmer used to sell knurling tool sets with some concave knurling wheels (type 5-L might be close)That curved knurling is beautiful. I should probably ask in the 'Fabrication' thread but, I wonder how you knurl on a compound curve like that?
Joe




