readme pcl Description of files
in Hewlett Packard pcl format.
The file BOOKPS.ZIP contains text in the PS format ready for printing
on a Postscript printer. The file size is approximately 3.4 MB.
When unzipped the file produces three zipped files plus
instructions which will fit on three 1.4 MB floppy disks.

The file BOOKPCL.ZIP contains text in the PCL format ready for
printing on a Hewlett Packard printer. The file size is
approximately 1.8 MB. When unzipped the file produces two
zipped files plus instructions which will fit on two 1.4 MB
floppy disks.

bookps.zip PS format file for downloading

.
bookpcl.zip PCL format file for downloading.

Files in the PDF format are also available for viewing on the Adobe Acrobat reader.

You can download or view these files individually or download the zipped version.

bookpdf.zip PDF format file for downloading. (File size is 2,608,419 bytes.)

Individual files for viewing.

part1.pdf part1.pdf

part2.pdf part2.pdf

part3.pdf part3.pdf

part4.pdf part4.pdf

part5.pdf part5.pdf

part6.pdf part6.pdf

part7.pdf part7.pdf

part8.pdf part8.pdf

part9.pdf part9.pdf

part10.pdf part10.pdf

part11.pdf part11.pdf

part12.pdf part12.pdf

part13.pdf part13.pdf

part14.pdf part14.pdf

part15.pdf part15.pdf

part16.pdf part16.pdf

# TROCHOIDS

### A **trochoid** is obtained by following a point on the spoke of a wheel
as the wheel rolls in a straight line without slipping .

### Consider a circle of radius R as it rolls in a straight line. Tracing the point A , which is a distance less than R along the spoke, produces a **curtate cycloid. **

### Tracing the point B, which is exactly a distance R along the spoke, produces a **cycloid.**

### Tracing the point C, which is a distance greater than R along the spoke, produces a
**prolate cycloid.**

# HYPOCYCLOIDS

### Following the motion of a point P on a spoke of a circle of radius b, as it rolls without slipping on the inside of a second circle of radius a>b, produces a curve which is called a **hypocycloid.**

# EPICYCLOIDS

### Following the motion of a point P on a spoke of a circle of radius b, as it rolls without slipping on the outside of a second circle of radius a>b, produces a curve which is called a **epicycloid.**

### Gear teeth are frequently made to conform to the cycloid shape so that
there is more of a rolling rather than sliding contact when the gears mesh.

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