Museum of Plugs and Sockets logo, small Academy ®
automatic Cube and Plugs
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In the 1950s Academy Electrical Products Corp. has developed non-grounding 'automatic' plugs
and connectors. Automatic means that no screw driver, knive or scissors are needed for wiring.

Patents show that Arthur Greenbaum has designed each of the plugs shown below.



Academy automatic 3-way cube

Academy automatic 3-way cube

Academy automatic 3-way cube

Academy automatic 3-way cube, detail


1 - 4 Academy automatic 3-way cube, rated at 15A - 125V.
1: topview.   2: cube with three non-grounding plugs. The brown wire is attached to mains by a wall plug (not shown). 
3, 4: inside views; both sharp brass needles (green arrows) punch the flat wire insulation when the two plug halves are closed firmly. See instruction card for details

 

Mid 1990s Academy Electrical Products Corp. became a brand of Eagle Electric Manufacturing Company, also based in New York. Plugs shown below have been marketed by Eagle as easy to install replacement plugs,  "just snap on! no tools needed".
Both Eagle plugs, bought in the US, have been donated by Roland Angenent.

Eagle Academy Super Plug
Eagle Academy Super Plug

5, 6

Academy® Super PlugTM rated at 10A - 125V.   {RA}

Plug was patented by Academy Electrical Products in 1991.
The US Patent Office assigned the patent to Eagle Electric Mfg. Co. in 1995.
Dissolution of Academy Electrical Products was proclaimed on May 3, 2000.



Eagle Academy Super Plug, details

7

The Academy Super Plug consists of two halves. Brass plug blades of the left half
have sharp points (red arrows) for penetrating the insulation of the cord that has
pushed in under latch spring of the other half.
Contact between blades and wires is made when the the two halves are pressed together (green arrow and dottes green line).
The procedure is shown also in steps 1, 2 and 3 on the Eagle instruction card right.
Eagle Academy Super Plug, card

Eagle Easy Install plug

Eagle Easy Install plug, details

8

 
9
Academy® Easy Install non grounding plug, made by Eagle Electric. Rating: 10A - 125V. The cord snap in method differs from the procedure used in the other two Academy plugs. In contrast to the Academy Super Plug (image nos. 5-7), a patent re-assignment to Eagle Electric was not necessary, because the original Academy Electrical Products patent expired already in 1985.   {RA}

How to wire an Easy Install plug.
(1) press blades together to free the blade unit; (2) open both blades; (3) push the two stranded wire all the way in; (4) press the blades fully back to their parallel position; (5) push back the blade unit into the cap; (6) the patent drawing shows that the barb (red arrow) of each blade has penetrated a wire insulation and realizes contact between wire and blade; (6 ,7) the drawing shows also that pushing the blade unit into the cap forces the cord into a zigzag shape. A pulling force exerted on the cord will not result in breaking off contact between blade and wire. Note that an eccentric cord entry is essential to establish a cord zigzag.

Academy ... Eagle ... Cooper

Eagle Electric Manufacturing was acquired by Cooper Industries in 2000 and became part of Cooper Wiring Devices. The 2018 Cooper catalog shows that Academy® Plugs are still available; find Super Plug and Easy Install Plug on page I-22. Cooper offers two versions of both plugs: a classic model with two 6.4 mm wide blades and a polarized model that has one 8.1 mm blade.
Academy® connector plugs are shown on page I-23. The Cube model has been changed slightly; the position of the three outlets differs.
Greenbaum's inventions have survived the changes in company management.

 

Patents

Images 1-4
US2704832   Multiple Cord Plug Receptacle.
Inventor: Arthur Greenbaum. Assignee: Academy Electrical Products Corp. New York, N.Y.
Application: March 23, 1954.  Patented: March 22, 1955.  Expiration date Mar. 22, 1972.

Images 5-7
US5041013   Electrical Connector.
Inventor: Arthur Greenbaum. Assignee Academy Electrical Corporation, Scarsdale, N.Y.*
Application: September 14, 1990.  Patented: Augustus 20, 1991.  Expiration date: Aug. 20, 2008.
* Assigned to Eagle Electric Manufacturing Company, Inc.. New York on August 31, 1995

Images 8-9
US3408616   Insulation Piercing Electrical Connectors.
Inventor: Arthur Greenbaum. Assignee: Academy Electrical Products Corp. Scarsdale, N.Y.
Application: April 21, 1966.  Patented: October 29, 1968.  Expiration date: Oct. 29, 1985.

 


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