US3823638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Page turning mechanism
Assignee: Individual
•
Filing: 1973-01-10
•
Granted: 1974-07-16
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Expires: 1993-01-10
Abstract
Abstract A plurality of pulleys and cables are secured respectively to a plurality of cooperating rotatable vertical wire rods which have horizontal extensions at each end and vertically disposed clear plastic strips connected between the ends for holding and turning pages. The cables are connected to horizontal slidable bars which are controlled by movement of a vertical cam plate, rack and pawl mechanism in one direction to turn individual rods and pages from right to left upon each movement of a first lever. A second lever and linkage and oppositely acting pawl, rack and cam turn the rods and page holders in the reverse direction from left to right. A rapid turning mechanism can successively turn all of the rods back and forth while bypassing the lever and pawl mechanism.
Inventors
- 👤 A Bombardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:28
CPC Classifications
B; B42; B42D; B42D9/00; B42D9/04; B42D9/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
298 words
A page turning device comprising a base plate for supporting a publication having a plurality of pages; a plurality of vertically disposed wire rods pivotally mounted on a central area of said base plate, each rod having opposite horizontally extending ends vertically spaced from each adjacent rod end; a plurality of wire rod supports spaced along said rods on said base plate, each rod being rotatable about a separate vertical axis through said supports, a group of said wire rods being spaced horizontally in a common plane through said supports; a plurality of vertically extending thin flexible page holding strips connected respectively between said opposite horizontally extending ends of each rod and engageable with the length of a page; a plurality of pulleys coaxially secured respectively on each vertical rod for rotation therewith, each pulley being spaced in vertical steps along each respective rod from each adjacent pulley, each pulley of a group of said pulleys being spaced in successive horizontal steps on respective adjacent vertical rods in said group of rods; a plurality of horizontally disposed vertically spaced wire cables secured respectively to each pulley; rotatable support means for guiding each respective said cable in alternate directions along a looped horizontal path, the horizontal length of each said cable varying in steps in accordance with the distance between each said rotatable support means and each said pullEy on each said rod in said group of pulleys and rods; and control means for drawing said cables and rotating said horizontally and vertically spaced pulleys on respective rods successively in selective alternate directions so that each of said cables secured to each of said pulleys on each of said rods turns each of said rods and page holding strips from one side of said base plate to the other.
Claim 2
Dependent Claim
298 words
A page turning device comprising a base plate for supporting a publication having a plurality of pages; a plurality of vertically disposed wire rods pivotally mounted on a central area of said base plate, each rod having opposite horizontally extending ends vertically spaced from each adjacent rod end; a plurality of wire rod supports spaced along said rods on said base plate, each rod being rotatable about a separate vertical axis through said supports, a group of said wire rods being spaced horizontally in a common plane through said supports; a plurality of vertically extending thin flexible page holding strips connected respectively between said opposite horizontally extending ends of each rod and engageable with the length of a page; a plurality of pulleys coaxially secured respectively on each vertical rod for rotation therewith, each pulley being spaced in vertical steps along each respective rod from each adjacent pulley, each pulley of a group of said pulleys being spaced in successive horizontal steps on respective adjacent vertical rods in said group of rods; a plurality of horizontally disposed vertically spaced wire cables secured respectively to each pulley; rotatable support means for guiding each respective said cable in alternate directions along a looped horizontal path, the horizontal length of each said cable varying in steps in accordance with the distance between each said rotatable support means and each said pullEy on each said rod in said group of pulleys and rods; and control means for drawing said cables and rotating said horizontally and vertically spaced pulleys on respective rods successively in selective alternate directions so that each of said cables secured to each of said pulleys on each of said rods turns each of said rods and page holding strips from one side of said base plate to the other.
Claim 3
Dependent Claim
139 words
The device of claim 1 wherein said control means includes a plurality of vertically spaced horizontally slidable bars connected respectively to each cable to draw said cables in alternate directions along said horizontal path, a vertically slidable cam plate having a vertically disposed cam slot, said cam slot including upper and lower horizontally displaced vertical portions and a central connecting portion, coupling means on each said bar engaging said slot to cause horizontal movement of said bars upon vertical movement of said cam plate and slot, and means for moving said cam plate in selective alternate vertical directions, said cam slot moving said coupling means horizontally between said upper and lower portions and successively moving said bars in a corresponding horizontal direction, said bars drawing said cables to rotate said pulleys and turn said rods and page holding strips.
Claim 4
Dependent Claim
176 words
The device of claim 2 wherein said means for moving said cam plate includes a vertically disposed toothed rack secured along one side of said cam plate, a pair of opposing vertically disposed pawls positioned adjacent said rack for engagement therewith, means for normally holding said pawls out of engagement with said rack, and a pair of intermittently operable levers connected to respective said pawls, movement of the first said lever causing the first said pawl to engage a tooth of said rack to move said cam plate downwardly a predetermined fixed distance between adjacent teeth and move a respective bar and cable and turn a respective pulley and rod from left to right, movement of the second said lever causing the second said pawl to engage a tooth of said rack to move said cam plate upwardly said predetermined distance and move a respective bar and cable and turn a respective pulley and rod from right to left, successive movements of each lever engaging successive teeth and moving successive rods in a selective alternate direction.
Claim 5
Dependent Claim
83 words
The device of claim 3 wherein said means for moving said cam plate includes an additional rapid continuous turning mechanism having a control cable connected to opposite ends of said cam plate, a plurality of pulleys rotatably secured on said base plate for guiding said control cable, and a slidable rod connected to said control cable to draw said control cable and cam plate in selective alternate directions to successively move said bars and cables and turn the respective said pulleys and rods.
Claim 6
Dependent Claim
23 words
The device of claim 4 including means for indicating the number of rods in an intermediate turned position of said rapid turning mechanism.
Claim 7
Dependent Claim
16 words
The device of claim 3 wherein said coupling means includes rollers rotatably mounted on said bars.
Claim 8
Dependent Claim
27 words
The device of claim 3 wherein said rotatable support means includes a plurality of idler pulleys secured on said base plate and rotatably supporting each respective cable.
Claim 9
Dependent Claim
27 words
The device of claim 7 wherein said rods, pulleys on said rods, cables, bars and idler pulleys are arranged in two tier groups, one behind the other.
Claim 10
Dependent Claim
21 words
The device of claim 8 including means for limiting the movement of said levers to move said pawls said predetermined distance.
Claim 11
Dependent Claim
19 words
The device of claim 8 wherein said rod supports include means for limiting the vertical movement of said rods.
Claim 12
Dependent Claim
64 words
The device of claim 8 including a guide block having horizontal channels for said plurality of horizontal bars, a first vertical channel for said toothed rack, a second vertical channel for said pair of opposed pawls, and a vertical bar between said pawls and toothed rack and resilient means connected between said pawls to normalLy maintain said pawls out of engagement with said teeth.
Claim 13
Dependent Claim
30 words
The device of claim 8 including tension adjusting means connected to each said idler pulley for applying adjustable tension to each said cable secured to said pulleys on said rods.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |