The Spring Motor of the Frick Electric Program Clock
1 Program Disk where pins where placed to indicate the time when bells would ring.
2 Toothed Wheel which sits on top of the revolvable drum or switch. See Figure 6 of the patent drawing for more detail and a view from the top.
3 The Revolvable Drum where pins were placed to engage the contact arms at their "shoulders" or bend. Each pin could control a 12 hour period. 14 pins would control a week which would permit programs for 7 days and 7 nights. See Figure 7 of the patent drawings for a view from the top.
4 Contact arms which would be raised at the free end when they engaged with the pins in the drum. When raised ends came in contact with the pin in the program disk the electric circuit was closed and the bells would ring.
5 Escapement Wheel
6 The Spring Motor which provided the power to turn the program disk so the pins set in it would be moved into position to ring the bells.
7 Lever with "V" shaped recess, which with the verge determined how long the bells would sound. The lever arm connected to a handle which was used to adjust the lever's position. This was a way to control the duration of the signal.

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spring motor which controls the program disk and ringing of the bells. Lever with "V" which along with the verge controls the duration of the signals. Revolable drum which hold pins that engage contact arms at the bend. Contact arm which is bent in order to make contact with pins placed in the drum. Escapement Wheel Toothed Wheel which sits on top of the revolvable drum or switch. Program Disk where pins to control bells would be placed.