3805203 is referenced by 16 patents and cites 4 patents.

Solenoid devices intended primarily to exert a force closely proportional to energizing current and particularly adapted for use in fluid pressure and flow controlling systems. The device includes an annular housing of magnetic material enclosing a nonmagnetic bobbin on which a coil is wound. An armature reciprocable within the bobbin in proximity to a pole piece of the housing exerts a force on a plunger extending through the pole piece. The controlled fluid may communicate with the interior of the bobbin; one end of the bobbin is closed and the other end is sealed to the housing so that the fluid may not escape from the device.

Title
Electromagnetic thrusters
Application Number
05/327,958
Publication Number
3805203
Application Date
January 30, 1973
Publication Date
April 16, 1974
Inventor
Deckard John I
Agent
Fitzpatrick Paul
Assignee
General Motors Corporation
IPC
H01f 07/18
H01F 13/00
View Original Source