# US 4,399,988 A · Apparatus

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- Number: US 4,399,988 A
- Document ID: US4399988A
- Status: Granted
- Kind: A
- Application number: 06/324,131
- Filed: 1981-11-23
- Granted: 1983-08-23
- Earliest claimed: 1981-11-23
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: George T. De Shong
- Web page: https://patentgrep.com/patent/US4399988A

## CPC

- H05K 13/04: Mounting of components {, e.g. of leadless components}
- Y10S 269/903: Work holder for electrical circuit assemblages or wiring systems
- Y10T 29/53174: Means to fasten electrical component to wiring board, base, or substrate
- Y10T 29/53196: Means to apply magnetic force directly to position or hold work part
- Y10T 29/53265: with work-holder for assembly
- Y10T 29/53974: having means to permit support movement while work is thereon
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A printed circuit board assembly fixture capable of securing the circuit board in a fixed relation to the inserting element of an electrical component inserting machine relies on the staking anvil of the assembly to precisely locate the circuit board and electromagnets to lock the circuit board in position for insertion of electrical components.

## Claims

### Claim 1

Apparatus for locating a printed circuit board having a hole for receiving an electrical component in relation to an inserting element of an electrical component inserting machine comprising: a fixed anvil assembly located beneath the inserting machine, said anvil assembly including a rigid support having an upper surface, and an anvil movable past the upper surface of the support from an at rest position to a staking position in alignment with the inserting element; a circuit board holder that includes a ferromagnetic plate having upper and lower surfaces connected by a hole, means for attaching said circuit board in a fixed position on the upper surface of said plate with the component receiving hole in alignment with the hole in the plate; resilient means for supporting said plate positioned between the upper surface of the rigid support and the lower surface of the plate; and a plurality of energizable electromagnets attached to and extending above the upper surface of the support to hold said plate in a fixed position beneath said inserting element when energized, whereby the holes in said plate and said printed circuit board may be aligned with said anvil and then said plate may be depressed to engage said electromagnets.

### Claim 2 (depends on 1)

The apparatus as defined in claim 1 wherein said resilient supports are spring-loaded castors attached to the lower surface of the plate.

### Claim 3 (depends on 1)

The apparatus as defined in claim 1 wherein said resilient supports are spring-loaded plungers extending upwardly from said upper surface of said rigid support.