HOME Science Wind - Air Power

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 wealth of the nation
    by Earth Day, Gaylord Nelson

    "...The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity that'as all there is. That'as the whole economy. That'as where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world...."
  • Happiness
    by Thomas Jefferson

    "...Our greatest happiness does not depend on the condition of life in which chance has placed us, but is always the result of a good conscience, good health, occupation, and freedom in all just pursuits...."

RANDOM FACTS

  • Harvard Medical School
    about Eyesight Myth and Fact

    Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable. Salary
    about Steve Jobs

    Steve Jobs' annual salary was $1, just enough to keep company health benefits.

Wind - Air Power :

Choose Your Color :

Category Information : Wind - Air Power

This is our Wind - Air Power category. If you are interested in Wind - Air Power, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
Sort by :RANKHITSTITLE

LINK LISTINGS :

Website preview thumbnail for : Green Mountain Energy
Received the highest numerical score among residential electric service providers in Texas in the proprietary J.D. Power 2014 Retail Electric Provider Residential Customer Satisfaction StudySM. Stu...
http://www.greenmountain.com

There is no news in this category!
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 : Vegas Horseback Riding
Horseback riding in Las Vegas. Choose from rides that include breakfast, lunch, or a sunset steak dinner. Overnight Las Vegas horseback tours also available.
http://www.vegashorsebackriding.com
Website preview thumbnail for : Adventure Balloons
Champagne hot air Balloon flights over Berkshire, Hampshire, Hertfordshire, Oxford, Surrey and London. The perfect surprise gift for that special occasion - Birthday Presents, Valentine Surprises, ...
http://www.adventureballoons.co.uk
Website preview thumbnail for : Its A Baby
We are a Bury UK based retailer of a wide range of baby and children's products. We specialise in offering prams & pushchairs.
http://www.itsababy.co.uk
Website preview thumbnail for : Associated Transformers
Associated transformers is a leading Transformer Manufacturing Company in Tamilnadu, India. Lead the industry in manufacturing of various types of transformers like Distribution, Furnace/ Rectifier...
http://www.associatedtransformers.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 :
Whether you're an experienced affiliate marketer or a novice simply looking to make some extra cash from your web traffic, The Vapor industry has grown to over 3.5 Billion in revenue in 2015, and continues to grow exponentially annually. It's not a one-time purchase industry, either- customers keep coming back. You don't want to miss out on this opportunity to join the gold rush of our generation. Our program is not only easy and free to join; we will give you $25 to sign up as a bonus.
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...
Just a line to say I'm living, That I'm not among the dead Though I'm getting more forgetful And more mixed up in the head.
In this highly competitive market, people are looking out for effective ways to improve their businesses.

Title for tab4 content :

What to you want here?