Opening the text

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriagesScott, Robert P. (Robert Pittis)

History

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriages

Name: Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriages
Author: Scott, Robert P. (Robert Pittis)

Scott, Robert P. (Robert Pittis)

Bicycles; Cycling; Tricycles

One reason for rollers being little used is that they tend to work out
of line with the axle and box, which causes some ends to get a little
in advance of the others, when they can no longer work perfectly. For
an oscillating bearing,—that is, one that goes backward and forward,
instead of continually around,—I have found rollers very good, since
they cannot get much out of line; even when the bearing is a little
imperfect, the rollers cannot multiply the imperfection, as they will
in one that keeps going on in the same direction. The other great fault
of the roller is its non-adjustability, although this can be rectified
in the following way:

[Illustration: Roller construction.]

The above cut shows a bearing and the construction lines that must be
followed in its manufacture. The taper of the axle, roller, and box
must all meet in a point, as at _a_; this arrangement is evident. The
roller must be kept in proper position and roll around the large end
in the same number of turns as the small end; hence the circumference
of the small end of the roller must bear the same relation to the
circumference of the larger as the relative ends of the axle and box
bear to each other. The geometrical conditions are as follows: π
being the relation of circumference to the diameter, referring to the
diagram, we have _bc_ : _fg_ :: _cd_ : _gh_ :: _be_ : _fi_; hence π_bc_
: π_fg_ :: π_cd_ : π_gh_ :: π_be_ : π_fi_. Now, by virtue of the last
formula, when the axle or box is revolved, each end of the roller will
travel through exactly the same number of degrees around the axle and
in the box, wherefore the axle rollers and box all keep straight.




                             CHAPTER XXI.

           ALUMINUM IN CYCLE CONSTRUCTION—STRENGTH OF TUBES.

  “We really thought that we were going to pass over a period of
  three months without having to chronicle the discovery (?) of
  a method of producing aluminum at a cost of not more than that
  of first-class steel. The periodical inventor has appeared, and
  this time he hails from Melrose, Mass., and his name is Washburn.
  Next!!”—_Bicycling World._

Public-domain text, read in full here on John Shaqi.

Opening the text

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriagesScott, Robert P. (Robert Pittis)

History

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriages

Scott, Robert P. (Robert Pittis)

Bicycles; Cycling; Tricycles

One reason for rollers being little used is that they tend to work out
of line with the axle and box, which causes some ends to get a little
in advance of the others, when they can no longer work perfectly. For
an oscillating bearing,—that is, one that goes backward and forward,
instead of continually around,—I have found rollers very good, since
they cannot get much out of line; even when the bearing is a little
imperfect, the rollers cannot multiply the imperfection, as they will
in one that keeps going on in the same direction. The other great fault
of the roller is its non-adjustability, although this can be rectified
in the following way:

[Illustration: Roller construction.]

The above cut shows a bearing and the construction lines that must be
followed in its manufacture. The taper of the axle, roller, and box
must all meet in a point, as at _a_; this arrangement is evident. The
roller must be kept in proper position and roll around the large end
in the same number of turns as the small end; hence the circumference
of the small end of the roller must bear the same relation to the
circumference of the larger as the relative ends of the axle and box
bear to each other. The geometrical conditions are as follows: π
being the relation of circumference to the diameter, referring to the
diagram, we have _bc_ : _fg_ :: _cd_ : _gh_ :: _be_ : _fi_; hence π_bc_
: π_fg_ :: π_cd_ : π_gh_ :: π_be_ : π_fi_. Now, by virtue of the last
formula, when the axle or box is revolved, each end of the roller will
travel through exactly the same number of degrees around the axle and
in the box, wherefore the axle rollers and box all keep straight.




                             CHAPTER XXI.

           ALUMINUM IN CYCLE CONSTRUCTION—STRENGTH OF TUBES.

  “We really thought that we were going to pass over a period of
  three months without having to chronicle the discovery (?) of
  a method of producing aluminum at a cost of not more than that
  of first-class steel. The periodical inventor has appeared, and
  this time he hails from Melrose, Mass., and his name is Washburn.
  Next!!”—_Bicycling World._

Public-domain text, read in full here on John Shaqi.

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriages

Cycling art, energy, and locomotion : $b A series of remarks on the development of bicycles, tricycles, and man-motor carriages

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