Lawn Mower Sharpened Efficiently with Simple Rigging
The Lawn Mower is Sharpened Quickly by the Use of This Rigging
With this device, one can quickly sharpen the lawn mower, or perhaps earn money sharpening the neighbors’ machines. Because several knives in a lawn mower work against the cutting blade, it is difficult to sharpen a mower satisfactorily with a file or stone. A usual method is to reverse the cutting-wheel cogs, turn the mower upside down, and run it backward over the ground. By the use of grinding paste on the cutting blade the cutting wheel tends to sharpen itself. This process can be improved by supporting the mower, as shown at A, the blocks permitting the mower’s driving wheels to rest outside them. A block, B, supports the wooden roller. Remove the driving wheels, and the gears which turn the cutting wheel. Take the gear from one end and put it in the other end, replacing the driving wheel. By revolving the latter backward, the cutting wheel will also turn backward. Apply a paste of emery powder and lubricating oil to the cutting blade, and adjust the blade so that it comes fairly into contact with the cutting wheel. Turn the driving wheel backward, and gradually tighten the adjustment until a good edge on the cutting blade and the knives is produced.
A handle fixed on the driving wheel, as shown at C, makes turning it easier. After sharpening, replace the gears, clean the bearings thoroughly, and replace the driving wheels.—Ed. M. Hawes, Everett, Wash.
Rubber Pads for Opening Screw Watch Bezel
The modern screw case for watches is primarily for the purpose of keeping dust from getting into the delicate works. Unless one is possessed of a strong grip, it is hard not only to set the case tight enough to keep out dust, but also to open the watch when adjustment is necessary. To make this work easy, a jeweler has, as a part of his tool kit, several rubber dies to fit the different sizes of watch cases. He made them from old rubber heels, cut to fit the watch cases closely. Danger of breaking the crystal is also overcome.—C. E. Drayer, Cleveland, Ohio.
Spring Roost Releases Poultry-House Door Latch
The Door is Opened Automatically When the Fowl Leave Their Roost