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Publication numberUS1539683 A
Publication typeGrant
Publication dateMay 26, 1925
Filing dateApr 1, 1924
Priority dateApr 1, 1924
Publication numberUS 1539683 A, US 1539683A, US-A-1539683, US1539683 A, US1539683A
InventorsLeslie R Mcdonald
Original AssigneeLeslie R Mcdonald
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Display apparatus
US 1539683 A
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Description  (OCR text may contain errors)

May 26; i925.

Lf R. MCDONALD DISPLAY APPARATUS Filed April- 1, 1924 6 Sheets-Sheet l www JN May 26, 1925.

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May 26, 1925.

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L. R. MCDONALD DISPLAY APPARATUSl Filed April J, 1924 6 Sheets-Sheet 6 Egg-6 05 ik 'I ried by shafts 53 and 54 disposed in suit- 4creased and the worm groove continued around the eccentric 59; and the shaft 54 carries a similar worm 56, which is provided with a similar taper 58 and asimilar eccentric 60, the pitch of the thread, however, on the worm and eccentric `being reversed from that of the thread on the worm 55. The ends `of the shafts 53 and 54 are provided with annular flanges 61, 62 having bevels 63, 64 adjacent to the grooves of their respective worms and 56. Beyond these flanges shafts and 54 are carried through suitable bearings 65, 66 and are provided respect-ively with cams 67, 68, aga-inst which bear ends 69 and 70 of a cross bar 71, attached to a flange 72 of the spring plate 73 secured at the botto-m of the apparatus and having its upper, free end providedwith fingers 75, 76 normally7 projecting through apertures in an inclined card guide 7 7, but adapted to be withdrawn by` springing backl of the plate 73 under the influence of the cams 67, 68.l

yIn the ends ofthe apparatus are placed card yguides 79, 80, adapted to engage the ends of the card and direct them in their descent into view position.

Between the worms 55 and 56 placed `a y card detent 83, which has an expanded and y rearwardly tapered head 84 disposed in a plane slightly above the worms 55 and 56, its rear end terminating just in advance of the axialline of the faces of the eccentrics 59 and 60. l y

Placards 90-90 of cardboard, or similar flexible material, are provided at their tops and bottoms with dovetailed notches 91,

Y adapted to straddle and slide along the detent 83, but not to be released therefrom until they reach its inner end, thus holding down the cards as they approach the rear of the apparatus, until the last one is in position to be raised and carried forward again. The upper portion of the last card rests upon a suitable support, such as a roller 95` journalled in the ends of the apparatus and disposed in line with the top of the eccentries 59 and 60 and the adjoining faces of the rollers'15 and 20; and owing to the fact that the support 95 and then'ieeting faces of the rollers 15 and 20 are set back of the plane of the eccentrics 59 and 60 and the fact that the bottoms of the cards are separated one from another by the worms 55 and 56, the cards will normallv tend to slant backward so that the Vpack will normally bear against the roller or support 95.l

VIn the drawings the thickness of the cards and the width of the worm thread have been increased, for clearness, substantially above therproportions permissible for use in actual practice; with the result that the number of cards shown in the illustration is considerably less than what may be used in a full sized operating machine.Vv

In practice it has been found that shafts Y of three quarters or seven eighths (7/8) of an inc-h diameter and thread of sixteen (16) turns to the inch may be used,'it being preferable, however, to gradually about double the pitch of the thread over thelast few turns before it merges withthe cam, as this will permit a better separation of the lower edges of the cards and give a better control over the cards by the mechanism which controls their successive elevation.

In Figs. 8 and 9 I have illust-rated a modification of the card forwarding mechanism, a single large `roller 100 being substituted for the five small rollers 32, 33, 34, 35 and 36, and another roller 101 being substituted for the two rollers 30 and 31; and instead of the belts 40, 41 and 42 I employ in the. modification an endless cord 102, which is carried around the rollers 15, 100, 16, 101 and across the apparatus over guide pulleys 103 and 104, one or both of the rollers 15 and 16 being preferably provided with grooves 105 to assist in guiding the cord as it travels around the rollers; y

This modified form of apparatus will efficiently handle the cards; but it requires a higher casing than the form which I first described, and is, therefore, not as economical of space as the other form. If the modified form of apparatus is used the worm gear 7 may be mounted directly on the shaft 105 of the roller 100, and the driving mechanism for the rollers 15 and 16 may be omitted as the traction of the roller 100 will be suicient to operate all the rollers in the system coveredV by the cord 102. y y

The operation of my apparatus is as follows.

The apparatus having been furnished, preferably with a full set of cards, the niotor is started and the following cycle` of operation takes place. The card at the back of the apparatus and which is resting against the support 95, is raised by the worm groove in the rotating eccentrics 59 and 60, sliding up above the next card until itsupper edge is gripped between the belts 40, 41, 42 and the roller 20, which then draw the card upward and feed it forward between the'belts and the rollers 33, 34, 35, 36 and 24, and discharge it downward behind the open front of the case. As the card descends its lower edge strikes the guides 79'and 80 and is directed inwardly and downwardly to the inclined face of the guide 77, along which it. slides until arrested by the fingers and 76 prothe pack ot cards has been moved backward on the Worms, and the bottoms of the last :teny cards being separated more Widely by the increased pitch of the Worm groove, the last ard slipping o'tl the end of the card deteut 83 and being free toy be raised in its turn by the cccentrics 59 and 60.

'.llhis inorcn'ient of the cards makes room for the lard which has just been transferred from the rear tothe front of the apparatus and is being held up on the tingers and 76.

The rotation of the cams 67 and 68 presses down the cross bar 7l and sorings forward the plate 73, withdrawing the finf'ers and TG from beneath the card, which hen slides down upon the bevelled faces 'j the flanges 6l and 62 and seats itself in :he worm grooves to be carried to the back of the machine in its turn.

'lhe receiving of the card, when it has dropped from above, by the guide 77 and the lingers 75 and 76 has the effect of being arrested gradually so that it does not fall vith its full Weight and directly upon Worms, but is let dovvn to them gently, o not to bruise or injure the card, and at the proper time to take up its backward travel under the influence of the Worm groove.

It will be .noted that this operation rererscs the card each time that it is trans- Afer-fred from rear to front, thereby exhibiting both of its sides for advertising purposes and practically doubling the publish- .ing capacity of the apparatus.

l1 urthermore, the direction in which the card will be bent in being transferred'from rear to front will be reversed with each transl' rence; thereby avoiding the giving of a. permanent set or bend to the cards, which might interfere With their normal positioning in the apparatus.

l desire it to be understood that the embodiments of my invention which I have shorrn and explained are to be considered as illustrative and not as exclusive types; for obviously details of construction may be modified, as by the use of mechanical equivalents, Without departing from the spirit of my invention as described and claimed.

Ial'avirg` thus described my invention, what l claim and desire to secure by Letters Alatent of the lvnitcd States, is

1. ln a display apparatus, the conibination ot a plurality ot independent, flexible placards, with supportingand shifting means embodying a pair of worms each having an enlarged end and placard transferring` means.

2. In a display apparatus, the combination of a plurality of independent, flexible placards, with supporting and shifting means embodying a pair of Worms embodyinfnT a worin having a helical and eccentrically disposed terminal thread and placard transferring means.

3. In a display apparatus, the combina.- tion of a plurality of independent, flexible placards, with supporting and shiftingl means embodying a `pair of' worms of opposed pitches each worm having a helical, eccentric tern'iinal, and placard transferring means. n

4. In a display apparatus, the combination of plurality of independent, flexible placards, .vith supporting and shifting means, placard detaining means adapted. to engage with the lower portions of the placards, means for initiating the separation of the placards successively, and placard transferring and reversing means.

5. In a display apparatus, the combination of a plurality of independent, flexible placards, with supporting and shifting' means, means for engaging with and hold'-` l i but not the last placard, means for initiating the separation 'of the placards successively, and placard ltransferring andl reversing` means.

7. In a display apparatus, the conibination of a plurality of independent, flexible placards each provided with .a marginal recess, with supporting and shifting means, placard detain'ing means, adapt-ed to engage within said marginal recess to hold down a placard, means for initiating the separation of the pla-cards successively, and placard transferring and reversing means.

8. In a display apparatus, the con'ibination of a plurality of independent, flexible placards each provided with a dovetailed marginal recess, with supporting and shifting means, placard detaining means, adapted to engage Within said marginal recess to hold down a placard, means for initiating the separation of the placards successively, and placard transferring and reversing means.

9. In a display apparatus, the combination. of a plurality ot lindependent, `flexible placards each provided with a dovctailed marginal recess in each of two opposite edges, with siupporting and shifting means, placard detaining,- means adapted to engage Within the dovetailed marginal recesses to hold down the placards, means for initiating the separation of the placards successively, and placard transferring and reversing means.

10. In a display apparatus, the combination of a plurality of independent, flexiblel ,ing rollers.

11. In a display apparatus, the combination -of a plurality of independent, flexible placards, with screw threaded supportingv and shifting means and placard transferring Vmeans embodying a` plurality of rollers and a cooperating flexible element.

l2. In a display apparatus, the combination of a plurality of independent, flexible placards, with screw threaded supporting and shifting means and placard transferring i means embodying a plurality of rollers and a plurality of cooperating flexible elements.

13. In a display apparatus, the combina tion of a plurality of independent, flexible placards, with screw threaded supportingr and shifting means and placard transferring means embodying a pluralityrof cooperating Y rollers, and a plurality of belts cooperating therewith.

14. In a display apparatus, the combination of a plurality of independent, flexible placards, with screw threaded supporting and shifting means and placard transferring means embodying a plurality of cooperating rollers disposed in a plurality of'horizontally parallel planes.

15. In a display apparatus, the combination of a plurality of independent, flexiblel placards, with screw threaded supporting and shifting means and placard curving and transferring means.Y

16. In a display apparatus, the combination ofY a plurality of independent, flexible placards, with screw threaded supporting and shifting means and means for'transferring the placard edgewise in a curved course.

17. In a display apparat-us, the combina tion of a plurality of independent, flexible placards, with screw threaded supporting and shifting means, placard transferring means and deflecting means.

1S. In a display apparatus, thel combination of a plurality of independent, flexible placards, with supporting and shifting means, means for raising, transferringr from rear to front and lowering the placards successively and means for preliminarily arresting cach placard when lowered.

19. In a display apparatus, the combination of a plurality of `independent, flexible placards, with supporting andA shifting rear to front and lowerin means, means for raising, transferring from rear to front and lowering the placards succesaively and means, embodying a retractable support, for preliminarilyv arresting each placa-rd when lowered. i

20. In a display apparatus, the combination of a plurality of independent, flexible placards, with supportingV and shifting means, means for raising, transferring from rear to front and lowering the placards successively, and means, embodying a resilient, retractable support, for preliminarily arresting each placard when lowered.

2l. In a display apparatus,the combination of a plurality of independent, flexible placards, with supporting and shifting means, means for raising, transferring from rear to front and lowering the placards successively and means, embodying an inclined guide and a retractable support, for preliminarily arresting each placard when lowered.

22. In a display apparatus, the combination of a plurality of independent, flexible placards, with supporting and shifting means, means for raising, transferring from the lacards successively and an incline gui e Vand a retractable support projecting therethrough for preliminarily arresting each placard when lowered.

23. In a display apparatus, the combination of a plurality o-f independent, flexible placards, with supporting and shifting means, means for raising, transferring from rear 'to front, reversing and lowering the placards successively and means for preliminarily arresting each placard when lowered.

24.. In a display apparatus, the combination of a plurality of independent, flexible placards, with supporting and shifting means, means for raising, transferring from rear to front and lowering the placards successively and means, embodying a retractable support, means embodying cams for retracting such support, for preliminarily arresting each placard when lowered.

25. In a display apparatus, the combination of a plurality of independent, flexible placards, withworms constituting supporting and shifting means, eccentric separating means, raising, transferring, reversing and lowering means, arresting means, and automatic means for releasing the arresting means. y

LESLIE a. neDoNaLn.`

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5355602 *Jan 19, 1991Oct 18, 1994Nsm AktiengesellschaftFor the display of music titles in a jukebox
Classifications
U.S. Classification40/476
International ClassificationG09F11/34
Cooperative ClassificationG09F11/34
European ClassificationG09F11/34