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An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.
Based on U.S. Patent Office records, H.M. Quackenbush and his company were responsible for inventing, or significantly contributing to the development of, numerous early 20th century inventions, including: bicycles; a foot-powered wood lathe; the scroll saw; darts; stair rails; the extension ladder; a bathroom shelf; the nut cracker and picks ...
Rope used on extension ladders to extend the fly sections. Also called Fly Rope. [5] Hand squirt A historical device used to squirt water onto a fire by hand. Also called simply a squirt or a syringe, these are perhaps the simplest and most ancient form of fire extinguisher. Known from the times of the Roman Empire but not documented in Europe ...
The ladder itself is capable of being converted into several heights and configurations from a single ladder. Configurations include a straight or extension ladder, an A-frame ladder, a staircase ladder (an uneven A-frame for use on stairs), a 90° ladder, and both sides of a scaffolding trestle achieved through a triple locking hinge.
In 1899, while working at his father's carriage manufacturing business and volunteering for the Kenosha, Wisconsin fire department, Peter Pirsch received the patent for the trussed extension ladder, a marked improvement upon the older, solid ladders that firemen had been using up to that point. With patent in hand, he founded Peter Pirsch ...
Some people like to build a CD ladder into their emergency fund, since CDs typically offer higher returns than other bank accounts. However, since the individual CDs within your ladder will take ...
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