System for indicating extent of overdrive in frictional drive arrangements

Spiral drum freezer apparatus, comprising:

• (a) an insulated enclosure;
• (b) a spiral drum having an outer surface and mounted for rotation within said enclosure and including a spiral belt helically disposed around said outer surface;
• (c) first drive means coupled to said spiral drum for rotating said spiral drum;
• (d) second drive means coupled to said spiral belt for driving said spiral belt, including a plurality of rotating guide means guiding said spiral belt;
• (e) first speed sensing means sensing said drum outer surface for generating a first output indicative of spiral drum rotational speed;
• (f) second speed sensing means coupled to said second drive means for generating a second output indicative of spiral belt speed;
• and
• (g) processing means for computing overdrive as a function of said first output and said second output.

Spiral drum freezer apparatus, comprising:

• (a) an insulated enclosure;
• (b) a spiral drum mounted for rotation within said enclosure and including a spiral belt helically disposed therearound;
• (c) first drive means coupled to said spiral drum for rotating said spiral drum;
• (d) second drive means coupled to said spiral belt for driving said spiral belt, including a plurality of rotating guide means guiding said spiral belt;
• (e) a sensing member having a generally circular periphery and coaxially aligned and coupled to said spiral drum having a plurality of precisionally spaced markings disposed proximate said periphery;
• (f) a first speed sensing means sensing said precisionally spaced markings for generating a first output indicative of spiral drum rotational speed;
• (g) second speed sensing means coupled to said second drive means for generating a second output indicative of spiral belt speed;
• and
• (h) processing means for computing overdrive as a function of said first and second outputs and generating a third output indicative of computed overdrive.

Spiral drum freezer apparatus, comprising:

• (a) an insulated enclosure;
• (b) a spiral drum mounted for rotation within said enclosure and including a spiral belt helically disposed around a periphery;
• (c) a drum gear motor;
• (d) first drive means drivingly engaged between said drum gear motor and said spiral drum for rotating said spiral drum;
• (e) second drive means coupled to said spiral belt for driving said spiral belt, including a plurality of rotating guide means guiding said spiral belt;
• (f) first speed sensing means coupled to said first drive means for generating a first output indicative of spiral drum rotational speed;
• (g) second speed sensing means coupled to said spiral belt for generating a second output indicative of spiral belt speed;
• and
• (h) processing means for computing overdrive as a function of said first output and said second output.

Spiral drum freezer apparatus, comprising:

• (a) an insulated enclosure;
• (b) a spiral drum having an outer surface and mounted for rotation within said enclosure and including a spiral belt helically disposed around said outer surface;
• (c) first drive means coupled to said spiral drum for rotating said spiral drum;
• (d) second drive means coupled to said spiral belt for driving said spiral belt, including a plurality of rotating guide means guiding said spiral belt;
• (e) first speed sensing means sensing said drum outer surface for generating a first output indicative of spiral drum rotational speed;
• (f) second speed sensing means coupled to said spiral belt for generating a second output indicative of spiral belt speed;
• and
• (g) processing means for computing overdrive as a function of said first output and said second output.

Spiral drum freezer apparatus, comprising:

• (a) an insulated enclosure;
• (b) a spiral drum mounted for rotation within said enclosure and including a spiral belt helically disposed therearound;
• (c) first drive means coupled to said spiral drum for rotating said spiral drum;
• (d) second drive means coupled to said spiral belt for driving said spiral belt, including a plurality of rotating guide means guiding said spiral belt;
• (e) a sensing member having a generally circular periphery and coaxially aligned and coupled to said spiral drum having a plurality of precisionally spaced markings disposed proximate said periphery;
• (f) a first speed sensing means sensing said precisionally spaced markings for generating a first output indicative of spiral drum rotational speed;
• (g) second speed sensing means coupled to said spiral belt for generating a second output indicative of spiral belt speed;
• and
• (h) processing means for computing overdrive as a function of said first and second outputs and generating a third output indicative of computed overdrive.