US1733587A - Bridge element - Google Patents

Description

Oct. 2 9, 1929. P. EBELING BRIDGE ELEMENT Filed May 19. 1928 i 45` 'Itis also one Patented Oct. 29, 1929 ritmiy EBELI'NQIJ oF 4NEW Levoluti N. ..Y.

1 AipplicationI-led-fllay 19,A

` l This;invention"relates,toy improvements in 'y bridges,particularly` bridges to ybe used kat v,street crossinlggpetc.,y ,as for instance 'described 'y in my (3o-pending application!Serial` No. 121,- 5 391iledJnly 9,1926'. v`

It is the `principal object lof this invention lftoaprovide a l yfoldable .or collapsible bridge :which may be .readilry set up, for .instance against thetwa'll of ahoiise and lallowpedesytrians, etc.l`7 tolsafely cross a street intersection rbyshtepping fromlthe housefonto thebridge into/the hollse on the opposite side of ofthe street. It will beclearfthat in this manner :the bridge,'may also"` be readily used AIt' will be cleary that any numbeiyof suchnbridges orbrdge elements may bensed to conf V,stitntea bridgeyforthe crossingrof compara' ^,ti1vely widestreets7 by simply Aplacing ythe end, ,l part. of one" element against the y,endparts yoi *flieg* Other:y end` by, simplyV setting the@ bridges `fendtoend.Jv Q y y y g-Another object ofiny invention-is Athe proj .VSOnfof bridge element having a roadway, which, lwhilej strongly. constructed,v `is adapt- -tocarry a,greatnumberl o pedestrians and @other loads, and gwhi'chmay berreagdily folded or swonndupon or from ysuitable rollersor .otherc means `in onder to avoid obstruction of e theviewlwhen the'b'ridgeis not ingnse, as for Y i f instance 'not i to prevent Athe free-L view from Athewindows of a house against gwhichithe, ryvbridgeelement is placed. t i Alturthergvb'ect of my invention-is'the pro- Qvision kQta'|` bridge element, allowing awready folding ofthe bridge proper against its snp-y l port which may either befeffectedby manual glabor; by means oitA connterweights, y etc., or byl motorie force.

40 ,A still further object of myinvention is the ,i provision of a bridge element equipped with a counterweight frame .or lthe` like( to facilitate fr'tlie/ffo'l'ding of lthegroadwayeagainst-` the snpf'ipertrlspartS-- y i f of they ob] ects kof my invention i -to-,construct the` ymechanism ffor effecting the yifalding' ,and )unfolding of Athe .groadwayg so fthatitvcan. readily be operatedtand is socomf-zbinedwithfthebridgeas to be readily accessiy i 591blegandtoconstruct thefoldablevroadway so pedestrians can.' readily enterfnpon"A the roaders 'Supporting 'the roadway,v and these and "other objcctsfand advantagesf-Inyinvention "will becomeimorerifnlly' knownl the i descripitionjthereojproceeds, andwill then be rspecificallydeinedin theapp'endedgclaims..

'materialpart ofthisldisclosure e i byibra'ckets l2; or Athe like.

1,9218. seria1No. 279,030.

that-a-maybe-f1ddfintq@Sambia-Chamber provided kinthe roadway'below ,the street .level,` or to construct .this roadway r'aQpluralityzofgparts. 4

It will be'understood'fthatfthe roadway of the bridge element may bes'etup atan inclination so as todgive ready access5'0rthatg'suitable stairs mayibepprovidedby means ofwhich way.` v n 'Lamps, advertisingsigns,"flagsfand other paraphernaliafmaybe conveniently combined with any of fthebrifdge elements; Qfm'yinvention,l and'fthese elements may bei constructed with' n or 'withcutl foot parts' accordingJ to* 'rep quireinent er the; special fpurpose" for which i, they are 'to be used.

fThe'baliisters used in'combination Vwith`^ my bridge' element aref*"foldableiagainst lthe'igirdi Injthe accompanying"drawingsfforming a 4Fig. Lisa side-elevation'ofa bridge'element constigucted according tomy invention.y

"ZFigQQ isY atop 'plan viewt-heref seen inthe 'direction of line'2-2fof Fignrel l. 30

As illustrated' eaich bridge element has `a pair of verticalI postsfl()y adapted to be placed `@with theilbase 1l .against a house wall etc.,

vrandy secured at their lower'ends in said baseplate or 'foot 1ly against whichftliey arebraced :The roadway consistsofa Iijluralityl of horizontahparallel and spaced side girders'lpiv- `'otally attached at'one` endto suitable brackets ill on the vertical-posts 10, andzsuppoi-ted by a framel Cables la're' securedyat their lowerKA ends to the outerend of Ifra-me '15,' and are guidedthroagh Ysuitable openings* in a cross-barv 17 secured between the-posts 10 .and carry counterweightsvlS. {To ifacilita'te the elevation otithevbridgefa 'GounterLbalance bracket 19, `earryi-n-g a suitable-weighti-20,

A connected therewith-bymeanswofI bars`f22 1s i provided which is 4braced near its lower ends byjmeansrof braces 21againstlthe girders 13. 100

The elevation of the bridge girders against the posts is eifected by means of cables 23 secured at their outer ends to the L shaped front cross-bar 24 and guided over rollers 25 5 on a cross-bar 26 connecting the posts 10 near the upper end thereof. The cables are then guided alongposts 10 downward, and around drums 27 to which their ends are secured, and which can be operated by means of the customarycrankhandles28. Or,theelevating of the girders and the bridge bed therein may also be eli'ected if desired by hand, by means of chains 29 or the like secured at one end to the side faces of the girders, as at 30, and guided through suitable sleeves 31 or the like, movably attached to cross bars 32 secured to the posts 10 so as to project beyond the same, and to the rear ends of said bars 32 substantially vertical braces 33 for the posts are attached, the lower vends of which are anchored in the foot parts 11. The roadway proper or walk for the pedestriansetc., consists of a plurality of interconnected Vparallel cross-slats'34, adapted to be rolled upon -or from a roller 35 extending on one side beyond post 10 and carrying a`suit able operating crank handle 36.

Cables 37`are attached to the front end of y. the walk, andare thenV guided over a roller 38near the outer ends of the girders and over Ha roller 39 to which their ends are secured,

and which is operated by means of a crank 40.V

* Braces 41 arepivotallyconnected at their i upper ends to the si-de faces of posts 10, and theirlower ends engage pins 42projecting from the' side faces of girders 13 from which they may quickly beA detached. Similar braces 43 are also pivoted atV their upper ends to the side faces of posts 10 while at their lower ends they vare removably attached to pins 44. )i i Rail posts 45 are pivotally attached at their lower ends to the girders 13 and carry attheir upper ends the balusters 46 pivotally secured thereto so as to allow a folding of the balusters against the upper face of the girders.

The frame supporting the side girdersis composed of the side bars 15 connected by cross bar 51, and longitudinal bars 47 attached at one end to end bar 24 and at the other end to a cross-bar 48 between posts 10. Lamps 49 on suitable brackets are provided at both outer sides of posts 10, and a sign board 50, adapted to ,'ontain yany suitable inscription or flags etc. y1sl supported on an upper crossbar connecting the posts 10. Y

` The operation of my improved collapsible road-crossing bridge elements will be readily o understood from'the above description by iny spection of the drawings, and it will be seen that when necessity arises any number or series of these elements may be combined to bridge a crossing or' act as a lire escape etc.,

cwithout impeding 4the regular traffic thereythe footless element is set up against houses on opposite sides of a street, the persons may pass from the windows onto the bridge and into the windows of the opposite house.

lVhen not in use the bridge element can quickly be collapsed so as not to obstruct the view, and in case of fire a safe passage from a burning building to a place ofV safetyr in a building on the oppositel side ofthe street may be provided. Y f

It will be understood that I have disclosed 35 the preferred form of my invention as an eX- v ample only of the many ways to practically construct the same, and that'I may make such changes in the general arrangement and in the construction of the minor details thereof: as come within the scope of the appended claims without departure from my invention and the principles involved.

Having thus described my invention, what l l claimV asr new, and desire to secure by Letf ters Patentl is,

1. Bridge elements for forming bridges and fire escapes, each comprising a plurality ofposts, apair of parallel spaced girders hinged at one end to said posts intermediateA their length, braces attached to said post-s and removably secured to said girders, a frame in which said girders are supported, a weighted counterbalance frame at one end of said girders for vholding the same in their horizontally extended Y position, e cables attached to said supporting frame, and weights on the ends of said cables, ak means for elevating and lowering said` girders against and from said posts, a foldable roadway between said girders, and a means for winding and unwin ding said roadway.

2. Bridge elements for forming road crossing bridges, each comprising a pair of posts, foot parts therefor, a pair of spaced parallel girders, means for pivotally connecting the inner ends of said girders with said posts intermediate their length, braces attached to said posts at one end and removably attached to said girders at their other end a frame 'A 120 bracket on one end of said girders, an elevated weight on sai-d frame to counterbalance the girders, a cable secured at one end to said frame and passed through said postsy at an elevation from their parts, weights at the ends of said cables behind said posts, cables attached to the free ends of said girders, rollers on said posts over which said ycables are guided, a means forwinding and unwinding said cables, braces for said posts, foldable" May, A. D. 1928.

PAUL EBELING.

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