Browse Prior Art Database

Type Element Tooth Checker

IP.com Disclosure Number: IPCOM000051500D
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Lonser, DE: AUTHOR [+2]

Abstract

An automatic testing device is described that checks for missing or partial teeth on a type element in conjunction with the assembly of a cap on the type element. It represents one station in a type element assembly apparatus such as that described in the preceding article.

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 70% of the total text.

Page 1 of 2

Type Element Tooth Checker

An automatic testing device is described that checks for missing or partial teeth on a type element in conjunction with the assembly of a cap on the type element. It represents one station in a type element assembly apparatus such as that described in the preceding article.

Reference is made to the drawing. Air under pressure is introduced into a chamber in component 1. This air bleeds through hollow spring-loaded plungers 2 that are located in component 3. The air, still under pressure, goes into a chamber in component 4 where it is vented into the atmosphere. The rightmost plunger 2 is shown in its upward position, while the leftmost one is shown depressed downwardly.

A type element is placed on the locator 5 and pressed down against sensor pins 6 spring-loaded by springs 11. Locator 5 is normally maintained in an upward position by spring 10, but is movable downwardly against the tension of spring 10 to allow depression of the type element into contact with the sensor pins 6. There is one sensor pin 6 for each tooth on the type element. When a tooth is missing or partially missing, the corresponding pin is not depressed. When the pins are all pushed down by the element teeth, air bleed holes 7 associated with the plungers 2 are blocked, causing a pressure increase in the chamber in component 1 which is sensed by a pressure switch (not shown). A soft material seal is used on the sensor pins 6 to insure a good blockage of the air passa...