Search results
Results from the WOW.Com Content Network
High lead logging is a method of cable logging using a spar, yarder and loader. It was developed by Oscar Wirkkala. It is accomplished with two lines (cables) and two winches (or cable drums). The mainline or yarding line extends out from one winch, while a second usually lighter line called the haulback line extends out from the other winch to ...
High Lead logging in Western Oregon Cable grue Larix 3T, installed on agricultural tractor. Cable logging, also referred to as skyline logging, is a logging method primarily used on the West Coast of North America with yarder, loaders, and grapple yarders, but also in Europe (Austria, Switzerland, Czech Republic, France, Italy).
His first patent was granted in 1917, and was for a four-drum donkey engine used in his high lead logging system. In the following years, several of his patented devices were manufactured, under the Wirkkala brand, at the Willapa Harbor Iron Works in South Bend. A few of his patented inventions were still in manufacture well into the second ...
A good deal of the cable-logging terminology derived from 19th-century merchant sailing, as much of the early technology originated in that industry. Common logging terms include high-lead yarder, ground-lead yarder, loader, snubber, and incline hoist.
Residents of a Cotswold village have been told not to drink tap water after high levels of lead were found in it due to lead piping. Thames Water has issued the warning to 34 properties in Bourton ...
A recent report found high levels of lead in 12 brands' cinnamon and multi-spice powders, prompting some of the companies to remove product from shelves.
Spar tree at a logging camp in the United States, 1924. A spar tree is the tree used as the highest anchor point in a high lead cable logging setup. The spar tree is selected based on height, location and especially strength and lack of rot in order to withstand the weight and pressure required.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!