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Program Disk of the Fred
Frick Electric Program Clock
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| 1 | The notched metal edge of the program disk has perforations or grooves made to hold the pins which are placed in a series to form the program or pattern for ringing the bells. | |
| 2 | The program disk's front face had figures from 1 to 12 to resemble a clock dial. The clock dial was divided into 5 minute intervals. (Some of the Frick clocks were marked in two and one-half minute intervals).Perforations in the outer metal portion of the program dial held the pins which were inserted at the place on the dial which corresponded to the time when bells were to ring.The program disk made one revolution every twelve hours. | |
| 3 | The free ends of the contact arms were bent laterally so they would come in contact with the pins placed into the notched area of the program disk when the ends of the contact arms were raised. This happened when the bend or "shoulder" engaged with the pins located in the revolvable drum. When the contact arm and a pin from the program disk engaged, the electric circuit was closed and the bell would ring. A post of insulated material along with socketed holders helped to keep the contact pins held in place. | |
| 4 | The revolvable drum sits behind the contact pins near where the bend or "shoulder" of the contact arms are attached. | |
| 5 | The spring motor which powers the rotation of the program disk. The motor is set in motion automatically every 5 minutes and moves the disk an equilvalent space. | |