Looks like a perfect copy of an IBM 001. They probably copied the defects too… I’d look up IBM 001 manual. Marc
> On Dec 4, 2024, at 1:01 PM, David Wade via cctalk <[email protected]> > wrote: > > > >> On 04/12/2024 18:49, Tony Duell wrote: >>> On Wed, Dec 4, 2024 at 6:41 PM David Wade via cctalk >>> <[email protected]> wrote: >>> Folks, >>> I have been trying to restore a manual card punch. The type with 12 >>> "Buttons" or "Plungers" that operate a lever which pushes a punch "pin" >>> through a die to create a hole in a card. >>> Its almost identical to this one:- >>> >>> https://www.computinghistory.org.uk/det/38019/ICL-Hand-Key-Punch-Card-Machine/ >> I know it. Mine has an ICT (International Computers and Tabulators) >> badge on the front > Mine says "Made In India" as well... > >>> >>> so despite lots of cleaning some of the pins stick down. Does any one >>> have any suggestions how to clean the small square slots? >> From memory there's the stem of the key in circular holes. There's a >> flat on the stem to engage the punch lever which is pivoted at the >> left hand side. And the punch pin in the die block. >> >> Do you know what is sticking? > The punch pin in the die block. After lots of cleaning the slots with a very > small file and lubricating with a modern lubricant with PTFE it now seems to > punch but the mechanism that controls the card advance seems to stick.. > >> There's a unit with 12 slots with ball bearings between some of them >> to the left of the buttons.. It prevents you pressing more than 1 >> digit key down at once. That cam cause the levers to stick. > > It doesn't have this.... > ... and I need to clean the rest... > >> -tony > Dave
