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Chapter 1 Mine Ventilation – An Overview

Chapter 1 Mine Ventilation – An Overview Page 1 Min-218 Reading Material A BRIEF HISTORY OF MINE VENTILATION by M J McPherson (Excerpts of Chapter from Subsurface Ventilation and Environmental Engineering 1993) Observations of the movements of air in underground passages have a long and fascinating history Between 4000 and 1200 BC European miners dug tunnels into chalk

Inventions of the 1800s

Before the invention of the stethoscope doctors used to discern heartbeats by applying their ears directly to the patient's chest However Laennec was unable to use this method when consulted by an obese woman Forced to find a solution to the conundrum Laennec came up with a rudimentary stethoscope by rolling up a newspaper Finding that he could hear the heartbeats much clearer in this fashion he later

Top 20 Greatest Scientists and Their Inventions That

One of the most successful inventors was Thomas Alva Edison who made 1093 inventions during his career including lights power battery telegraphs and mining He also made improvements on the telephone besides inventing kinetoscope He was a hard working scientist and spent more than 20

Whisky heroes Aeneas Coffey

In 1808 the first practical continuous still was invented by Jean-Baptiste Cellier-Blumenthal and patented in 1813 There soon followed various patents which worked on the same principle with varying degrees of success among them the Savalle still named after Dutch sugar trader Armand Savalle who improved the Cellier-Blumenthal process Many of these are still in existence in rum and

Drilling Through History

Invention of the rotary drill The first rotary drill was invented by Englishman Robert Beart Read more 1845 Invention of the mechanical percussion drill J J Couch invented the first mechanical percussion drill which he later perfected with the help of fellow inventor J W Fowle Steam was admitted alternately to each end of a cylinder The drill was thrown like a lance at the rock on the

Introducing engineering 3 2 Lighting inventions

3 2 Lighting inventions The Davy lamp is just one example of an inventive solution to a problem In that case existing materials were used to provide the answer In some cases though the development or use of new materials is part of the inventive process and the new material allows the creation of new products In this section I will look at some lighting inventions that progressed through materials

How Big is a Hole? The Problems of the

Invention of the Miners' Safety Lamp by Humphry Davy and George Stephenson in Late Regency England by Frank A J L JAMES Presidential Address read at the Royal Institution London 12 May 2004 INTRODUCTION An instance for Bacons spirit to behold — Davys magic lantern — The Miners Davy c Every philosopher must view it as a mark of subjection set by Science in the strongest holds of

Six Sigma – Wikipedia

Six Sigma (6σ) ist ein Managementsystem zur Prozessverbesserung statistisches Qualittsziel und zugleich eine Methode des Qualittsmanagements Ihr Kernelement ist die Beschreibung Messung Analyse Verbesserung und berwachung von Geschftsvorgngen mit statistischen Mitteln

Gatling gun

The Gatling gun is one of the best-known early rapid-fire spring loaded hand cranked weapons and a forerunner of the modern machine gun and rotary cannon Invented by Richard Gatling it saw occasional use by the Union forces during the American Civil War in the 1860s which was the first time it was employed in combat It was later used in numerous military conflicts including the Boshin

Automation in U S longwall coal mining A state

However in order to meet the Coal Mine Health and Safety Act of 1969 multiple escapeways (a fresh air and a return air) plus neutral belt entry must be maintained while mining coal Furthermore continuous miners are not designed to cut rock so all entries are driven in-seam in rectangular shape As a result US longwall mining at the

Who Invented the Gas Mask?

His invention worked through the use of a bulb-shaped filter to sieve dust from the inhaled air The device also had a vent through which air was released back to the atmosphere John Stenhouse a Scottish chemist constructed early versions of the device following Haslett's design

Continuous miners

Continuous miners Though there are many variations in design continuous miners mostly consist of five main elements A central body to carry all other components mounted on some type of drive mechanism to provide mobility (most commonly tracks) A cutting head usually rotating drum(s) and/or chains with cutting picks attached A loading mechanism to pick up cut coal and deliver

Inventionmine Intellectual Property

At Invention Mine we pride ourselves on having an open collaborative environment Mentoring younger attorneys and helping them become better patent attorneys and agents is one of our most important goals This spirit of sharing and collaboration results in far better work for our clients and also equips us to become better problem solvers learners and innovators in an ever changing global

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27 04 2016[UPDATED with results—see below] Andrea Rossi says he is the inventor of the E- the LENR based energy source that he has been making claims about since at least 2011 which I covered in my book An Impossible Invention Since I'm curious to get a picture of what the opinion is today about Andrea Rossi and his claims I invite you to answer the poll below

invention continuous miner

For example FIG 1 schematically illustrates a continuous miner 20 according to one embodiment of the invention The continuous miner includes a cutting drum 22 a chassis or frame 24 and a tail 26 The drum 22 is coupled to a ranging arm 28 that moves the drum 22 from mine roof to floor and/or from mine floor to roof (e g as the drum 22 cuts)

Chapter 1 Mine Ventilation – An Overview

Chapter 1 Mine Ventilation – An Overview Page 1 Min-218 Reading Material A BRIEF HISTORY OF MINE VENTILATION by M J McPherson (Excerpts of Chapter from Subsurface Ventilation and Environmental Engineering 1993) Observations of the movements of air in underground passages have a long and fascinating history

THE HISTORY OF DORR

THE HISTORY OF DORR-OLIVER Dorr-Oliver began at the turn of the 20th century as two one-man operations backed by single patents for equipment developed to solve processing difficulties in gold milling The founders of both companies realized very early the need for both development of new equipment to make continuous processing possible and the continuing mechanical improvement of