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Manufactured By:
Nye Co.
Buffalo, NY
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Title: |
1915 Article, Lockhart-Hodge Co., Jones Jointer Saftey Guard |
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Source: |
The Engineering Magazine Mar 1915 pgs i & ii |
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Insert Date: |
2/8/2012 12:24:29 PM |
LOCKHART-HODGE GUARDS
Undoubtedly the wood planer or jointer or buzz-planer, which is found in practically every woodworking establishment, is the most dangerous of all woodworking machinery, if not properly guarded. This machine has caused innumerable accidents and maimed thousands. The dangers of the planer are manifold. A change of grain of the wood, an unnoticed knot, a hard spot in the lumber, will often throw the wood from the machines, and allow the hands of the operator to drop into the whirling knives, with terrible results. Experienced operators will tell you that when one gets hurt on a jointer, he "gets it right."
There is no question as to the results. There are a number of jointer guards on the market. Some are a great deal better than others; some are no protection whatsoever, and in reality do more harm than good. For example, jointer guards which rely on springs and counterweight contrivances for their operation are not safe. In the first place, when the lumber is being pushed through, it pushes the "leg o' mutton" guard to the side, and when the "kick back" occurs, the springs do not pull the guard back over the knives quickly enough to prevent the operator's hands from falling into the knives. On the contrary, they have a tendency to hold the operator's hands in the knives by springing back against them. When one considers that the estimated speed of the "kick back" on a jointer is 2 miles a minute he realizes that a guard relying on a spring or counter weight, must of necessity be inadequate for protection.
A real guard for a jointer, to be the efficient, must not be cumbersome, must be easily adjustable for different thicknesses of lumber, must be one which is over the knives at all times, except when changing knives or making repairs, and even then must be close at hand so that it may immediately be put back on the machine. The Jones Jointer Guard, made and sold by The Lockhart-Hodge Co., Inc., of Buffalo, is the ideal guard for jointers. It is made up of sections of cold rolled steel plates put together in telescopic fashion, and extending outward over the knives, to the jointer fence. It is always over the knives, and the operator's hands pass over the guard, and in case of a "kick back," fall onto the guard, not into the guard and not the knives. When making repairs, the guard telescopes together and by the turning of a hand wheel, may be dropped to the side, completely out of the way.
The Jones Jointer Guard never projects outside of the machine, so as to be in the way of the operator or of a passing truck. Some guards not having the patented telescopic feature, stick outside of the machine, and cause accidents from tripping, etc.
The Jones bears the endorsement of factory and insurance inspectors, all over the country, and will be sent on 30 days' trial anywhere in the United States. |
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