A page turning device for a book, comprising:
- a. a securing means to adjustably fix a book into an operative position which would allow material to be suitably exposed for reading;
- b. a plurality of rods rotatably hanging at their top ends around an adjustably fixed hanger;
- c. each of said rods being programmably positioned in sequence behind a group of at least one leaf of said book;
- d. guiding means for the lower ends of said rods to travel in a predetermined path;
- e. said guiding means allowing the lower end of each of said rods to travel freely between the two extremes of said predetermined path, maintaining said rods in their sequence when they are to travel in groups or when they are lined up to wait for operations;
- f. a first limiting stop means located near one of said extremes of said path to provide a firm and spatially precise stopping to the lower end of one of said rods that is made ready to act in the operation of the invention;
- g. a second limiting stop means adjustably located near the second of said extremes of said path to provide a firm and spatially precise stopping to the last one of said rods which was made to travel from said first limiting stop means toward said second limiting stop means within the allowance of said guiding means;
- h. pushing means to push the group of said rods which crowd near said first limiting stop toward the rod that is firmly and precisely stopped by said first limiting stop, and to push the group of rods which crowd near said second limiting stop toward the rod that is stopped by said second limiting stop means;
- i. selecting means to choose a present active rod, defined as the one of said rods that is firmly and precisely stopped by said first limiting stop means, and to isolate said present active rod from the rods that are pushed toward it;
- j. driving means to act on said selecting means to cause said present active rod to overcome momentarily said firm and spatially precise stopping by said first limiting stop means and to travel along said guiding means, in the direction from the first stopping means area to the second stopping means area, defined as the forward direction, pushing along with it a group of at least one leaf behind which said present active rod is positioned, and thus causing, by proper design of said predetermined path, the turning of said group of at least one leaf and exposing the next set of pages for reading;
- k. updating means to cause the rod positioned next to said present active rod to take the position of the next active rod by causing said first limiting stop means to provide again, after being overcome by said present active rod, immediately said firm and precise stopping to the lower end of said next active rod;
- l. said driving means causing said present active rod to overcome said firm stopping by said second limiting stop means and to make said present active rod into said last one of said rods which is made to travel in said forward direction, within the allowance of said guiding means;
- m. returning means to relocate said selecting means to a spatially precise stand-by position near said first limiting stop means, completing the process of making said next active rod into a new present active rod;
- n. control means to activate on cue the actuation of said selecting means, driving means and returning means;
- o. whereby, after a book has been adjustably fixed by said securing means and said plurality of rods has been programmably positioned in sequence each behind each group of at least one leaf of said book and said plurality of rods has been pushed toward the very first present active rod which has been made to be confined by said firm and spatially precise stopping of said first limiting stop means, and the sequentially first set of pages has been exposed for reading, the cue for a forward page turning would start said control means to activate said selecting means to choose said present active rod, then to activate said driving means to act on said selecting means to cause said present active rod to overcome momentarily said firm and spatially precise stopping by said first limiting stop means and to travel along said guiding means, turning a group of at least a leaf of said book and at the end of the course of said present active rod, locking open the next set of pages of said book for reading by virtue of said firm stopping by said second limiting stop means, then to activate said returning means to relocate said selecting means to said spatially precise stand-by location while said pushing means and updating means complete the making of said next active rod into a new present active rod, thus making the invention ready, in a repetitive manner, for the next cue for page turning again, until all the turnings are exhausted.