This weight lifting tool has a worm that engages many wheel spindles with its turns, for that reason it is very safe. In contrast, when the screw engages a single wheel tooth that withstands all the effort, if that tooth breaks, it could cause serious damage and prejudice.
a B C D E
I argue that if a flat surface weight is to move on another plane of solid surface, its movement will facilitate, whether they are interposed between them balls or if you use rollers. Between balls and rollers I see no other difference except that the balls have a universal movement, in all directions, while the rollers can move in only one direction.
However, if the balls or the rollers touch each other as they move, there is no doubt that the movement will be more difficult than if such contact does not exist, since their contacts are produced by opposing movements, as in the 5th of the sixth Is demonstrated and, consequently, such friction causes contrary movements.
But, if the balls or, if we mean, the rollers are kept at a certain distance between each other, there will be no more contact between weight and resistance than a single point, as shown in the penultimate of the second, and for that reason it is as if both planes were held at the ends of the line of support and, consequently , It will be easy to make such a move.
I argue that if a flat surface weight is to move on another plane of solid surface, its movement will facilitate, whether they are interposed between them balls or if you use rollers. Between balls and rollers I see no other difference except that the balls have a universal movement, in all directions, while the rollers can move in only one direction.
However, if the balls or the rollers touch each other as they move, there is no doubt that the movement will be more difficult than if such contact does not exist, since their contacts are produced by opposing movements, as in the 5th of the sixth Is demonstrated and, consequently, such friction causes contrary movements.
But, if the balls or, if we mean, the rollers are kept at a certain distance between each other, there will be no more contact between weight and resistance than a single point, as shown in the penultimate of the second, and for that reason it is as if both planes were held at the ends of the line of support and, consequently , It will be easy to make such a move.
[Figure 1]
If the pinion is the one that moves the wheel, the spaces between the teeth of the pinion should be larger than those of the wheel. If the wheel is the one that moves the pinion, it would do the opposite.However, if both are well made, it is acceptable that they have equal spaces and teeth.
[Figure 2]
If you turn one of these wheels, the other, being united, will turn in the opposite direction
[Figure 3]
If you want a wheel to rotate in the same direction as the driving wheel, that wheel must have a third degree movement.
[Figure]
[Figure 4]
A b c d
Whichever direction you turn the wheel d, the wheels a b will rotate in it. And the wheel c will turn in the opposite direction. The same will happen when turning a and b. And if you turn the wheel c, all the others will turn the opposite.
[Figure]
[Figure 5]
If you put two wheels spinning one to the other with your teeth, if they are in contact from outside, the wheels will turn in the opposite direction. But if one of the wheels with its outer teeth turns the other through the inner part, the wheels will rotate in the same direction, either of the two drive wheels.
