ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel
  • »
  • Education and Science»
  • Elementary, Middle School & High School

Simple School Projects

Updated on December 19, 2012

Concept Oriented Education

The sole aim of this and a series of blogs is to impart quality and concept oriented education to children. In today's world, parents have to be well educated and are bound to spend quality time on their children for the benefit of their future. Most parents lack in time in paying attention for various reasons. To ease their job, we've planned to release a list of projects for them to help their children. These projects seem to be very simple but informative. Honestly, the projects were collections from various sources but presented in our own style. So, thanks for all sources. The projects are based on items that we use in our daily life. Hope, this would help children develop their skills in science. The list of projects is not limited to the following but will increase in course of time. To start with, the first and simple project is

How does a Ball Pen work?

We all know and seen a ball pen or a ball point pen. We would've used it in our daily life. We're not going to see the detailed use of it here, as the focus would be only on the concept.

Fine, before we start, keep a ball pen with you that you might not be using for the moment. That is, an exhausted one. You're going to analyze how it works. So, before throwing the used one, let's us see the important parts and the concept behind.

Step 1 - Important parts and Assembly - Refer Video 1.

  • Steel or Brass Ball
  • Spring
  • Cam & a follower like arrangement.
  • Ink reservoir tube
  • Push button to push the ball point in and out

Assembly:

  • Push button is attached to a follower ( a small rod ), the follower is attached to a tube containing ink in it. At the end of the ink reservoir tube a ball is set. The ink reservoir tube has a spring in it. See the video below. The whole arrangement is kept in a casing.

Working Mechanism

The tip of the pen has the ball on a socket. The ball on the other hand will receive ink from the ink reservoir tube. The ink, which is viscous in nature, acts as an lubricant for the ball to move. The ink is forced down by gravity. The rolling mechanism allows the ink to flow through the ball and to write on the paper. The tolerance between the ball and reservoir tube helps in two ways; one to get the ink on gravity and the second to allow air so that the ink does not dry.

When the push button is pressed down, it works on the spring pressuring the ink reservoir tube move down. Here, there will be tiny pits and teeth that help in locking mechanism. When the push button is retracted, the cam-follower mechanism is applied and the pen gets unlocked.

Ball Pen Assembly

Cam and Follower Mechanism

Retractable Ball Pen

Step 2 - Clicking Mechanism

What is a cam and a follower? What is its mechanism?

Cam is flat that has an unusual shape. It will be in contact with a rod called Follower. The movement of cam and follower resembles simple uniform motion as in pendulum. Follower moves in a particular direction based on the rotation of cam. The locking and unlocking of pen is done by the cam-follower mechanism. The video 2 attached to it explains the working principle of cam and a follower.

Comments

Submit a Comment

No comments yet.

working

This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: "https://hubpages.com/privacy-policy#gdpr"

Show Details
Necessary
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
Features
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Marketing
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Statistics
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)