US2645538A

US2645538A - Posting stand

Info

Publication number: US2645538A
Application number: US68310A
Authority: US
Inventors: Segal Samuel
Original assignee: Wilson Jones Co
Current assignee: Wilson Jones Co
Priority date: 1948-12-30
Filing date: 1948-12-30
Publication date: 1953-07-14
Anticipated expiration: 1970-07-14

Description

S. SEGAL POSTING STAND July 14, 1953 3 Sheets-Sheet 1 Filed Dec. 50, 1948 M A ORNEY July 14, 1953 s. SEGAL POSTING STAND 3 Shets-Sheet 2 Filed Dec. 50, 1948 INVENTOR A ORNEY July 14, 1953 s. SEGAL 2,645,538

POSTING STAND Filed Dec. 30, 1948 3 Sheets-Sheet 3 "4 "II.- r. 10,101.".

l h HI,

AT? RNEY Patented July 14, 1953 Ltdifii POSTING STAND Samuel Segal, New York, N. Y., assignor to Wilson-J ones Company, Chicago, 11]., a corporation of Massachusetts Application December 30, 1948, Serial No. 68,310

11 Claims. 1

This invention is a posting stand particularly although not necessarily adapted for use by book keepers, and one object has to do with conveniently controlled means for quickly setting the depressible platform thereof to selected and most suitable elevations. Another object resides in employing the platform in depressing the latter to actuate separable bars for collapsing toggle means pivotally relative to the base of the stand and against the resistance of adjustable spring means normally acting to maintain the toggle means extended. Another object is concerned with effectively operable accessible means for locking the separable bars against displacement relative to the platform to retain the latter at a selected elevation. Another specific object is realized in arranging the separable bars transversely of and within the platform to be guided by spaced rods sustained by and disposed longitudinally of the platform. A further object resides in utilizing abutment means cooperating with the slidably guided separable bars to compress the springs on downward displacement of the platform relative to the base. A further object resides in oppositely threading spaced portions of the guide rods to cooperate with similar threaded abutment means for shifting the latter towards or away from each other in the matter of adjusting the springs. Another important object is to provide spaced bearings sustained by the platform for rotatably guiding the spaced guide rods to displace threaded abutment means thereon in a direction towards or away from each other to compress or expand the adjustable springs. A still further object is concerned with an uninterrupted and partly threaded rotatable rod cooperating with partly threaded butterfly slots to detachably lock the slidably guided bars against displacement relative to the platform at selected elevations of the latter. A "further object is to utilize the springs about the threaded guide rods to automatically shift the slidably guided bars towards each other upon unlocking of the interrupted rod from the walls of the partly threaded butterfly slots for automatically elevating the platform. Another object is to regulate the intensity of the springs to compensate for the type of load applied to the platform. Other important objects and advantages will be apparent from the following detailed specification considered with the teachings of the accompanying drawings wherein:

Fig. lis a perspective view of the posting stand according to my invention showing the slidably guided platform in its fully raised position.

Fig. 1A is a fragmentary perspective view of the control means for adjusting the tension of the load absorbing spring means.

Fig. 2 is a view similar to Fig. l but showing the platform fully depressed.

Fig. 3 is an underneath sectional view of the stand shown in Figs. 1 and 2 however taken on the line 3-3 of Fig. 4.

Fig. 4 is a vertical sectional and broken view on the line 4--4 of Fig. 3.

Fig. 5 is a transverse sectional view on the line 5-5 of Fig. 4.

Fig. 6 is an underneath sectional view on the line 6-6 of Fig. 2.

Fig. 7 is a sectional view on the line l-l of Fig. 6.

Fig. 8 is an enlarged transverse sectional view on the line 8-8 of Fig. 3.

Fig. 9 is a perspective View of the link carrying means and the associated locking means.

Fig. 10 is a sectional view on the line Ill-4i! of Fig. 9 illustrating the link carrying means unlocked.

Fig. 11 is a view similar to Fig. 10 showing the link carrying'means locked.

Fig. 12 is a sectional view on the line 12-!2 of Fig. 10.

Fig. 13 is a transverse view of one of the indicating blocks or spring abutments, and

Fig. 14 is a fragmentary view illustrating one of the abutment carrying rotatable rods mounted on a bushing sustained by the platform.

The posting stand generally denoted PS comprises channel shaped standards or posts Ill supported on the swiveled casters II and appropriately fixedly carrying the panel or base B having spaced depending flanges l2 straddling the lower portions of the transversely spaced expandible and contractible toggle systems each broadly denoted T. Each toggle system comprises pairs of lower links l3 having their upper ends pivotally connected to the lower ends of the intervening links or bars i i in turn having their upper ends pivotally connected to the lower ends of the upper links i5 which have their intermediate portions carried and pivoted on fulcrum pin [6 while the intervening or intermediate links are suitably pivoted on the fulcrum pin ll.

Of importance to observe is that the upper ends of links l5 are each provided with an opening is (Fig. 8) pivotally surrounding studs l9 extending laterally of spaced bars or members 2i]. Axles or studs I!) carry rollers or wheels 2| adapted to roll against the inside surfac 22 of the platform or 3 shaped feet 24 slidably nested and retained by the corner columns or posts 10.

The depending front and rear flanges 23 of platform 23 closely straddle wheels 2| to preclude their accidental removal from their axles [9 which constitute fulcrum means for the upper links l5. The lower ends of links E3 of the toggle systems are pivotally sustained on the fulcrum rod 2'? effectively carried by the spaced depending flanges [2 of the base B, there being spaced relief slots 28 provided in the base B to permit divergence of the lower links l3.

Extending longitudinall of and within platform 23 are the transversely spaced rods 33 which 7 project through the unthreaded guide openings 31 in the spaced slidably guided bars or members 20. Each rod 33 is rotatably sustained in the bushings or bearings 32 each provided with a reduced portion 33 (Fig. 14) fitting into openings 34 in the flanges or spaced depending sides 35 of the platform.

Each rod 33 is provided with left and right threaded portions 36 and 3i respectively cooperating with corresponding internally threaded bores 40A in

abutment blocks

38 and 39 each having a fixed indicating post 4! projecting into and displaceable relative to an associated slot 42 disposed near the indicia or graduation marks as 49, I0, I38 etc. on the top surface of platform 23.

In part surrounding spaced portions of the spaced rotatable rods 30 on which the transversely disposed slidably guided bars 20 are mounted, are the helicoidal springs 43 having ends abutting against

blocks

38 or 39 and an adjacent slidably guided bar 20. The arrangement is such that when the platform 23 is depressed by the operator from its fully elevated position (Fig. 1) the slidably guided bars 20 separate further and act to compress springs 33 simultaneously against

abutment blocks

38 and 39. Conversely when the force applied by the operator tending to depress the platform is removed, these springs auto matically expand, hence urging slidably guided bars 20 towards each other, thereby actuating the upper ends of the upper links l towards each other whereby the toggles T expand, thus automatically raising platform 23.

For holding the platform in predetermined position of elevations in respect to base B, effective locking means is provided to prevent displacement of the parallel but slidably guided bars 20, such locking means taking the form of partly externally threaded or interrupted cylindrical rod 56 having the parallel flat faces 5| to define a reduced part 53. Attached fixedly to the enlarged portions 5 3 of rod 58 is the handle or crank 55 and rod 50 has a reduced terminal portion 44 rotatably guided in opening 35 in an associated flange35 of the platform 23. I

Where the spaced threaded portions 56 of the rods or shaft 53 are clear of internally threaded portions 5'! (Fig. 11) of the butterfly shaped bores 58 in the spaced slidably guided driven bars 23,- rod 53 is unlocked from both of the latter, thus permitting displacement of bars towards or away from each other in case the platform is elevated or depressed respectively. Butterfly slots 58 also embody end portions 59 characterizing with the intermediate zone of the internally threaded portions 57 relatively elongating gaps appreciably wider than the diameter of the partly externally threaded reduced portions 53 of rod 53. If therefore handle 55 be operated to arrange shaft 50 to be clear and free of threaded portions 51 (Figs. 9 and 11) the bars 20 are thus unlocked to permit their shifting relative to their spaced guide rods 30. This permits the platform to be adjusted to predetermined position of elevation, and such selected position is retained when the operating handle 35 is rotated about ninety degrees whereupon the spaced threaded parts 56 of shaft 33 interlock or engage with the spaced threaded portions 51 of the butterfly slots 58, thus retaining bars 20 in set positions, precluding displacement of the toggles '1 relative to the base.

According to the invention, the tension of springs 33 may be adjusted if desired. To this end each rod 30 is provided with a non-circular terminal 43 adapted to be actuated by a key K removably fitting into several of the end bushings 32 each carrying an adjustable threaded set screw ll. Consequently if the shafts 36 be rotated relative to respective bushings 32,

abutment blocks

31 and 33 may be shifted towards or away from the spaced slidably guided bars 20 depending upon the extent of power desired in the springs 43 and such may be regulated by the aid of the graduation marks on the scales (Fig. 1) adjacent slots 12 in the platform.

Briefly recapitulating, the platform 23 of the posting stand is adapted to effectively support suitable books necessary for office operators who can quickly adjust the platform to a suitable elevation convenient for working. This is accomplished by first unlocking rod and thereafter if the platform be at a high elevation it may be shifted to a more suited lower elevation by depressing the same. The platform is held in its selected position by turning rod 50 to lock the displaceable bars 29 against movement relative to the platform.

If the platform be in a lowered position the slidable bars 23 are unlocked from the locking rod 53 and the platform automatically elevated since the normal tendency of the helicoidal springs 43 is to urge the bars 20 towards each other thus extending the toggle systems.

Various changes may be made in details of construction and arrangement of parts without departing from the spirit of the invention or sacrificing any of the advantages thereof inherent therein.

I claim:

1. In a posting stand, a base, a platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, apertured bars within said platform, roller means carried by said bars and riding against said platform, toggle means movably connected to said bars and base, rods carried by said platform, said rods projecting through the apertures in said bars and slidably guiding said bars lengthwise of said platform, abutment means on said rods, said abutment means being spaced from said bars longitudinally relative to said platform, and spring means interposed between said bars and abutment means to actuate said bars for extending said toggle means to elevate said platform.

2. In a posting stand, a base, a platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means pivotally sustained on said base and having diverging portions movably connected to said bars, spaced rods carried by said platform and projecting through said openings for slidably guiding said bars lengthwise of said platform and 1 each having oppositely threaded portions, spaced abutment means, disengageable locking means to preclude displacement of said bars relative to said rods, and helicoidal spring means interposed between said abutment means and bars for actuating the latter to shift said diverging portions towards each otherto extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means.

3. In a posting stand, a base, a platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means movably interposed between said bars and base, spaced rods carried by said platform and projecting through said openings for slidably guiding said bars lengthwise of said platform and each having oppositely threaded portions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, and helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means.

4. In a posting stand, a base, a platform, bearing means on said platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means movably interposed between said bars I and base, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each having oppositely threaded portions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, and helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means.

5. In a posting stand, a base, a platform, bearing means on said platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means movably interposed between said bars and base, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each having oppositely threaded portions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means, and key receiving means extending from said rods into said bearing means for rotating said rods for shifting said abutment 6 means towards or away from each other to vary the intensity ofsaid springs.

6. In a posting stand, a base, a platform, bearing means on said platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means pivotally supported on said base and having diverging portions movably connected to said bars, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each having oppositely threaded portions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, helicoidal spring means interposed between said abutment means and bars for actuating the latter to shift said diverging portions towards each other to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means, and key receiving means extending from said rods into said bearing means for rotating said rods for shifting said abutment means towards or away from each other to regulate the intensity of said springs.

7. In a posting stand, a base, a platform, bearing means on said platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means movably interposed between said bars and base, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each having oppositely threaded portions, spacedabutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means, key receiving means extending from said rods into said bearing means for rotating said rods for shifting said abutment means towards or away from each other to regulate the intensity of said springs, and indicating means to assist in controlling the intensity of said springs.

8. In a posting stand, a base, a platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and'having guide openings, roller means carried by said bars and riding against said platform, toggle means havinglower portions pivoted relative to said base and having upper diverging portions movably connected to said bars and actuated by the latter to extend said toggle means on elevating said platform relative to said base on movement of said bars towards each other and said upper portions being actuated away from each other to collapse said toggle on lowering of said platform for shifting said bars away from each other, spaced rods carried bysaidplatform and projecting through said openings for slidably guiding said bars lengthwise of said platform, abutment means on said rods, locking means to preclude displace ment of said bars relative to said rods, and helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate said platform pursuant to unlocking of said locking means.

9. In a posting stand, a base, a platform having slots, bearing means on said platform, means carried by said base and platform for slidably guiding the lattertowards or away from-said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars and riding against said platform, toggle means having lower portions pivoted relative to said base and having upper diverging portions movably connected to said bars and actuated by the latter to extend said toggle means on elevating said platform relative to said base on movement of said bars towards each other and said upper portions being actuated away from each other to collapse said toggle on lowering of said platform for shifting said bars away from each other, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each of said rods having oppositely threadedportions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, helicoidal spring means interposed between said abutment means and bars for actuating thelatter to extend said toggle means toautcmatically elevate said platform pursuant to unlocking of said locking means, key receiving means extending from said rods into said bearing means for rotating said rods for shifting said abutment means towards or away from each other to vary the intensity of said springs, posts extending from said abutment means and movably guided in said slots, and means to indicate the extent of displacement of said posts relative to said slots.

10. In a posting stand, a base, a platform, bearing means on said platform, means carried by said base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform and having guide openings, roller means carried by said bars andriding against said platform, toggle means having lower portions pivoted relative to said baseand having upper diverging pertions movably connected to said bars and actuated by the latter to extend said toggle means on elevating said platform relative to said base on movement of said bars towards each other or to collapse said toggle on lowering of said platform for shifting said bars away from each other, spaced rods rotatably carried by said bearing means and projecting through said openings for slidably guiding said bars lengthwise of said platform and each of said rods having oppositely threaded portions, spaced abutment means on each of said rods and having cooperative threaded means engaging said oppositely threaded portions, disengageable locking means to preclude displacement of said bars relative to said rods, helicoidal spring means interposed between said abutment means and bars for actuating the latter to extend said toggle means to automatically elevate saidplatform pursuant to unlocking of said locking means, and key receiving means extending from said rods into said bearing means for rotating said rods for shifting said abutment means towards or away from each other to vary the intensity of said springs.

11. In a posting stand, a base, a platform, means carried by the base and platform for slidably guiding the latter towards or away from said base, shiftable bars arranged transversely of said platform, guide means in each of said bars, roller means carried by said bars and riding against said platform, toggle means movably interposed between said bars and base, rods extending longitudinally of said platform and engaging said guide means to guide said bars longitudinally of said platform, abutment means positioned in the horizontal plane of said bars and spaced there from longitudinally relative to said platform, and spring means interposed between said abutment means and bars to facilitate the movement of the platform away from said base.

. AMU EL SEGAL.

References Cited in the file Of this patent UNITED STATES PATENTS Number Name Date 136,883 Von Ehren Mar. 18, 1873 187,647 Levi Feb. 20, 1877 738,395 Barnes Sept. 8, 1903 755,706 Schellenbach Mar. 29, 1904 817,634 Fagerstrom Apr. 10, 1906 920,135 Harrod May 4, 1909 1,171,793 Krbavac Feb. 15,1916 2,158,020 Hruska May 9, 1939 2,251,873 Gibbs Aug. 5, 1941 2,278,817 Zeindler Apr. 7, 1942