HOME Science Inventions

CATEGORIES

TODAY IN HISTORY

    TELEPHONE SWITCHBOARD
    January 17, 1882 - Chicago, Illinois, U.S.A.

    A telephone switchboard was issued a U.S. patent to Leroy Firman of Chicago, Illinois (No. 252,576), which was assigned to the Western Electric Manufacturing Co. Also of Chicago. With his invention of a “multiple switchboard for telephone exchanges,” Firman addressed the problem of increasing numbers of subscribers. Previously, single switchboards, each with an attendant, served their group of individual lines. A large exchange was thus divided up into a number of internal exchange switchboards which were worked together as necessary, with trunk lines between the boards. Firman devised an arrangement to handle an exchange of a thousand or more subscribers with line status information exchanged between switchmen.

    PUNCHBOARDS
    January 17, 1905 - Chicago, Illinois, U.S.A.

    The first U.S. patent was issued for a punchboard to Charles A. Brewer and Clinton G. Scannell of Chicago, Illinois, described as “vending devices.” They were manufactured by Charles A. Brewer & Sons in the same city. (No. 780,086). Even though the equivalent of punchboards had been around for many years, they had never been available in such a neat and portable form. The invention of board stuffing machines and ticket folding and plaiting machines in the late 1910s was probably the key factor which allowed the punchboard industry to flourish. Once the boards became cheap to manufacture, they flooded the country. Noted gambling author John Scarne estimates that 30 million punchboards were sold in 1910-15.

MEMBER LOGIN

RANDOM QUOTES

  • The Revolution
    by John Adams

    "...The Revolution was effected before the War commenced. The Revolution was in the minds and hearts of the people; a change in their religious sentiments of their duties and obligations. This radical change in the principles, opinions, sentiments, and affections of the people, was the real American Revolution...."
  • Rules for Happiness
    by Immanuel Kant

    "...Rules for Happiness: Something to do, Someone to love, Something to hope for...."

RANDOM FACTS

  • Drug Abuse
    about Facts about Drugs

    Facts about drugs can protect against drug abuse. Legal drugs, such as alcohol and tobacco, kill more people than illegal drugs. Tobacco (smoking cigarettes) kills more people than any other drug. Illegal drugs including heroin, cannabis, ecstasy and amphetamines can have unknown or dangerous ingredients. Mixing drugs, especially with alcohol, can be fatal. More vehicles
    about Stolen On New Year's

    More vehicles are stolen on New Year's Day than any other holiday throughout the year. (So does that mean thieves are having their last fling before changing their ways or are they trying for a big score to start the New Year?)

Inventions :

Choose Your Color :

Category Information : Inventions

This is our Inventions category. If you are interested in Inventions, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.

There is no news in this category!
There are no links in this category! Add a Link listing today!
There are no articles in this category! Add an article listing today!

Featured Link Listings (random) :

A random section of our Featured link listings :
Website preview thumbnail for : Search Office Space
Search Office Space was founded in 1993 by Richard Smith in order to bring together all elements of the serviced office space market into one convenient single point of contact, with clients having...
http://www.searchofficespace.com
Website preview thumbnail for : Article And Link Dir
100% Search engine friendly Human Edited Article and Link Directory with Free and Paid Inclusions and Deep Links for Site Links and Articles. Submit your Site now.
http://www.articlenlinkdirectory.com
Website preview thumbnail for : My Guardians
My Guardians provide UK Guardianship Services & advice to parents & children worldwide on how to obtain guardianship & schooling in the UK.
http://myguardians.co.uk
Website preview thumbnail for : Aalsmeer Web Dir
Worldwide business listings web directory Website submissions human reviewed business web index company directory with directory search.
http://aalsmeerwebdirectory.com

Video Listings :

A selction of listings chosen randomly that contain embedded videos.

Featured Article Listings (random) :

A random section of our Featured Article listings :
Friendship poems happen to be just the best medium of expressing eternal friendship to that special friend. You can let all the love and affection you possess flow out, right onto the paper lying in front of you, through a sweet little friendship.
Unfortunately just like humans our pets will age too. With the aging process comes health problems and with health problems comes very expensive vet bills. Research you dog
In this highly competitive market, people are looking out for effective ways to improve their businesses.
The course of the River Thames as we know it today was created about 10,000 years ago, by melt water from the ice-sheets that covered much of the United Kingdom during the last ice-age...

Title for tab4 content :

What to you want here?