Tuesday, November 18, 2025

Alnico magnets


  Before there were rare earth magnets, there were Alnico (Aluminum Nickel Cobalt) magnets.
  Flexible magnets, made by mixing ferrite magnet powders and synthetic/natural rubber binders were brand new in the mid fifties.
  They had been invented by the German company Max Baerman, Goodrich Rubber developed a way to make them in sheet form, specifically for refrigerator door seals.
 

Monday, November 17, 2025

Knott Apparatus clamp


   Here's a nice little scientific apparatus over-center clamp , one of many types the Knott Apparatus Co. of Boston made over their 36 year existence. The company started in 1896, buying out the E. S. Ritchie Instrument company after the principal passed away in 1895. They became one of the largest suppliers of scientific equipment in America but closed during the Depression.




Monday Mystery, a cast iron scale?

The name Fairbanks is cast into it, there seems to be a curved frame, possibly to hold a bowl or something similar and a strange tippy bird foot-like base. Ideas?



 

C E Jennings Expansive bit

C. E. Jennings sold all sorts of tools under the Arrowhead label.  This expansive bit acknowledges the Steers patent of 1884 shown below.

  The company seems to have been in business from the 1880s to the mid 1930s, expanding their business in part by acquiring other companies along the way. Their office was on Murray St.in New York, the factories were located in Yalesville, Conn and Port Jervis NY.  

  Catalog of their tool boxes and tool kits here.


 

Datamp.org US Patent: 296,242

Saturday, November 15, 2025

Know your hoses


 Top to bottom; steel braided rubber, clear pvc, reinforced pvc, plain reinforced neoprene, textured reinforced neoprene, copper.

A nice test for illustrators, a few lines and yes that is indeed a clear hose... but how to differentiate a copper from a steel line?

Croname panels

  Here's a metal promotional screw specification chart from the Croname company, who specialized in electroplated panels for instruments panels, dial scales for radios, badges, etc., all those metal plates that used to decorate tools and equipment.  The name is a contraction of the Crowe Name Plate & Mfg. Co. of Chicago and seems to have started in business in 1942. There was a branch of the company located in Waterloo, Quebec that went by the name of Croname-MacDonald Ltd.  The company seems to have disappeared in the early 90s.

Friday, November 14, 2025

Can-Pro wrench




I found this wrench at a thrift shop, never seen the name before and a quick Google search brings some conflicting results. This statement comes from the most likely site,  https://canpro-tools.com/en/ but gives precious little information. Here's what they say; "We’re a family-owned company based in Toronto and Montreal with over 35 years of innovating & developing tools & hardware for industrial market."   Or try this... https://canprotool.com/


Fashion Friday, The eyewatering '80s


 No. That is not Kenny Roberts...

 My experience with red leather indicates that the dye was never water proof- until it soaked into your skin.