Browse Prior Art Database

Method and Means for Automatically Adjusting Stored Energy Hammer Elements

IP.com Disclosure Number: IPCOM000045051D
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 3 page(s) / 46K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

A spring-loaded hammer assembly 10 provides a setscrew 11 rotatable to set the preload holding force of spring hammer beam 12 in proper balance with the magnetic holding force of permanent magnets 13 on magnetic core block 14.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 57% of the total text.

Page 1 of 3

Method and Means for Automatically Adjusting Stored Energy Hammer Elements

A spring-loaded hammer assembly 10 provides a setscrew 11 rotatable to set the preload holding force of spring hammer beam 12 in proper balance with the magnetic holding force of permanent magnets 13 on magnetic core block 14.

An automated method begins with the initial setting of setscrew 11 loosely in magnetic core block 14. The method then proceeds as follows: 1. The coil driver control circuit 15 repeatedly pulses coil driver 16 which energizes coil 17 to repeatedly release

hammer beam 12. Between pulses the beam 12 is recaptured,

causing an induced voltage signal (see Fig. 5) to be

generated in coil 17. 2. A digital output pulse is then produced by voltage sensor 18 that is detected by stepper motor control circuit 19 which

sends clockwise control signals to the

stepper motor driver 20. 3. The stepper motor driver 20 causes the stepper motor 21 to rotate setscrew 11 in a clockwise direction until beam 12 is

displaced to the position where permanent magnets 13 are

incapable of causing recapture. 4. When beam recapture ceases, voltage sensor 18 produces no digital output pulse and stepper motor control circuit 19

supplies a feedback pulse to coil driver control circuit 15,

causing it to switch from pulse mode to bias mode, thereby

supplying a bias current to coil 17. 5. Failure to recapture also causes stepper motor control circuit 19 to switch off the clockwise (C/W) control pulses

and switch on the counterclockwise (CC/W) control pulses

which are supplied at a very slow rate, causing

counterclockwise rotation of setscrew...