PORTABLE MAGNETIC CHUCK

• US 3,854,711 A
• Filed: 06/13/1972
• Issued: 12/17/1974
• Est. Priority Date: 06/13/1972
• Status: Expired due to Term

• Current Assignee: Poy Dong
• Original Assignee: Poy Dong
• Inventors: Dong, Poy
• Primary Examiner(s): Smith, Al Lawrence
• Assistant Examiner(s): Smith, James G.
• Application Number:
  US05/262,299
• Time in Patent Office: 917 Days
• Field of Search: 269/8,94 51/216R 335/286,295 317/157.5CL
• US Class Current: 269/8
• CPC Class Codes: B23Q 3/154 Stationary devices

Abstract

A magnetic work holder system including a work holder base adapted to hold a plurality of position blocks for positioning one or more work pieces comprising a laminated work surface formed of alternately arranged magnetic and non-magnetic strips, first and second clamp blocks disposed on opposite sides of the work surface, each of the clamp blocks having engaging means on their inner edge for clamping one or more position blocks disposed between them on the work surface, each of the clamp blocks including fastening means for tightening the clamp blocks down toward the work holder base and means for applying increased clamping force to the position blocks.

Claims

1. A magnetic work holder system including a work holder base adapted to hold a plurality of position blocks for positioning one or more work pieces and having a laminated work surface formed of alternately arranged magnetic and non-magnetic strips, comprising first and second clamp members disposed at opposite sides of said work surface, each of said position blocks having a recess at each end, each of said clamp members having a salient portion on its inner edge for engaging said recess in one or more position blocks disposed between them on said work surface, each of said clamp members including means for tightening a said clamp member toward said work holder base and means, cooperating with a said clamp member, for rotating said salient portion inwardly and downwardly to secure said position blocks, said magnetic strips on said work surface extending farther down that said nonmagnetic strips and providing a plurality of spaces between the extended said magnetic strips;

and means for providing a magnetic field including an array of magnet members spaced apart by the thickness of a non-magnetic strip, said array being nestable in the underside of the work surface with its magnet members between the magnetic strips and proximate the underside of said nonmagnetic strips.

2. The magnetic work holder system of claim 1 in which each of said magnet members is located in a non-magnetic strip with a magnetic insulator layer covering the four of its six sides not including the two surfaces which interface with the magnetic strips on either side of said magnetic member.

3. The magnetic work holder system of claim 1 including mechanical actuator means for moving said array of magnet members toward and away from said work surface.