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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 logging donkey would be operated by an engineer [11] [12] called since about 1920 [13] a donkey puncher. [ 14 ] [ 15 ] In later times the donkey puncher was too far away from the end of the line for verbal communication, so whistle codes were developed similar to those used by tug boats employing steam whistles . [ 16 ]
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.
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U.S. health officials again warned of high lead levels found in some ground cinnamon. The FDA recommended a distributor for one brand issue a recall after similar warnings recently.
Badia Cinnamon Powder: 1.03 PPM of lead Deep Cinnamon Powder: 1.02 PPM of lead “If you have one of those products, we think you should throw it away,” says Rogers.