US1866613A - Bridge - Google Patents

Description

July 12, 1932. AURYANSEN 1,866,613

' BRIDGE Filed June 6, 1929 3 Sheets-Sheet l HIGHWAY INVENTOR FREDERICK AURYANSEN 5y 722's aziarneys July 12, 1932. F. AURYANSEN 1,366,613

BRIDGE Fild.June s. 1929 s Sheets-Sheet 2 RAILWAY INVENTOR FREDERICK AURYANSEN;

J y F. AURYANSEN I 1,866,613

BRIDGE Filed June 6; 1929 3 Sheets-Sheet 5 HIGHWAY INVENTOR FREDERICK AURYANSEN 5 )zz's az'farnqyfi Patented July 12, 1932 ,UNITEDS ATES, orrlc-sf 1 rnnnnniciz AnnYANsEN, or JAMAICA, mw YORK V RIDGE faAnpl icationiilefl June 6,

My invention relates to bridges, and more particularly bridgesfwhich swing horizontally. The invention is especially useful in connection with skew bridges, or bridges which cross a channel at an' angle, but its use is notlimited to sucli'bridges.

An object of the invention is the provision of. a swing bridge'having a minimum weight and costing a minimum amount: Another object is the provision ofa swing bridge which may be constructed in a minimumof headroom. A further object is the provision of a swing bridge which may be operated with aminimumof power. Still a further may be added to widen an existing bridge.

. fQIm of the inv n -section, j

Fig. 6 is a plan'view of a further mod ii object is the construction of a bridge. in,

multiple complete units," one or .moreof which may be in use before the other units are added, or the construction of units WlllCll Fig. 5 isan elevation of partly in;

cation of the invention, and a v Fig. 7 is a plan view illustrating, how different elements. of a bridge constructed 'in accordance with the invention may be combined. 5 It is a well recognized factjthat of all draw-bridges thefswing bridge, which turns horizontally about a vertical axis is the most economical type, under surrounding condi tions which make its use perm1ss1ble.1- In many cases,however, the usual typeof swing bridge, which is symmetrical. both longitudinally andjtransversely about the central pivot, or vertical axisjof'rotati-o'n, cannot meet the requirements of the site. Under isknown as the bob tail are :lo'cated segmentsi the v two" segmentsA and iecsfse iai No. 368,860.

suchconditions recourse must be had to other types of bridgeor to a different type of swing bridge. Thus there has been "developed what 7 bridge, which isa swing bridge symmetricaltransversely about the pivot but not longitudinally symmetrical about the pivot. The shorter'end ofthe bob tail bridge must be counterweighted to compensate for the excess dead weight of the longer end when turning or'open and there-, fore ofi" of its wedge supports. V I have found that it is possible to construct a new type of swing bridge which is of lighter weight, less expensive, simpler, and more easily'and economically operated than known types of bridges. I I My invention consists of aswing bridge pivoted atone corner-and adapted to rotate horizontally about the pivot. -The bridge may be divided longitudinally, that is to say it may be formed in two independent longi tudinalstrips or segments each of which is a complete bridge across the channel. The

separate strips or. segments are preferably used in pairs similar in shape andde sign. The bridge preferably has no supports within the channel which it crosses. p Referring now vmore specifically .to; the

drawings, there is shown a. bridge formed in two longitudinal segments A and 'B. Pivots 10 are provided at opposite ends of the bridge about which the segments swing.- The pivots at, opposite outer corners of the The segments "comprise two longitudinal main girders, consisting of an outer girder 11 and an inner girder, 12. "(More than two main girders may, of course,- beemployed.) To these girders maybe attached floorbeams, 13 which carry a deck or tracks. A pivot 10 isplac d at cne end of the outer" girder 11 of egm'ent and the'correspondlng p ivot'is one placed attheopposite end of the outer girder; 11 of the other segment.

a B are swung away? fronieachother about their respective pivots; L The bridge is here illustrated as af; skew bridge; ,that isto say, a bridge which crosses a channelfatf an angle "The pivoted end of each segment is 'square"at the abutment,'-but "To opeIi-the bridge i dation,

the opposite end is skewed or raked at an angle which'conforms substantially with the angle which the channel makes with the bridge. Thus the outer main girder 11 is longer than the inner main girder 12. Each segment is pivoted at its most inland corner.

The bridge is supported by wedges in the usual way when it is closed. When the bridge swings or is open other means of support are provided. WVhen the wedges are released for operating'the'bridge the. outer; main girder is anchored at the pivot and is supported at an intermediatepoint'by a mem ber 14 which is carried by rollers 15 running on an arcuate track 16. The end of the'girder 11 most inland, is anchored tothe pivot; 10 by means which permit it torotate about the pivot, and. the pivotisanchored to its founso'that the pivot and its foundation:-

perform the function of a counterweightto balance'the portion of girder 11 which-extends beyond member 14 and across the channel. The inner girder 12, however, extends over the channel for nearly its entire length. Iprefer to support the inner girder by means. of a balance beam 17 an end of which supports the girder at an intermediate point. The? balanceubeam is carried near its midoint by a member 18which may be similar to the member 14. The member 18 is in turn carried by rollers 19 runningon an'arcuate track 20. :The other endof thebalance beam is count'erweighted. In Figs. 1 and: 2 the balance beam 17 is shown as counterweighted' by being attached to the pivot 10 the foundation of which acts as a counterweight. In Figs. 3 {i and 5 thereis shownian actual counterweight. 21 attached.v to the free end of the balance beant.

The-bridge corner 22: which is nearest the pivot 10 may alsobe carried on rollers (not shown) running on an arcuate track, 23.

prefer to place the machinery for operating thebridge at a point 24 adjacent the n1em= ber 14'whichgsupports the outside girder 11. However, this macliiner'y may be placed at any convenient point.

i-Wherethe pivotfoundation will serve as a counterweight only to a limited extent, I

mayfbalance only part of the Weight-of the inner girder. 'by means of a pivot foundation, supporting the remainder of the weight by means of a separate balance beam 17 Z) such as that illustrated in- Fig. 4. Such a construction is illustrated .in

. that although two adjacenttracks 16 and 25: are hereshown for carryingthe weight ofthe outside girder 111 and the separate balance beam 17b,a single track maybe used for thispurpose by employing a construction such as that illustratedinFig 4. a f

.Still another construction of counterweight and balance beam is illustrated in Fig. I 7. Here the weight of; the inner 7 main.

Fig. 6. It is to be understood main girders at intermediate points permits the use of girders of comparatively less depth, strength, and weight. This results in'economy of material as well as making possible-the. constructionot bridges of this type where very limited. headroom: is avail-. able. In addition, building the bridge in two segments-makesiti possible to build each segmentof. lighter construction; the floor beams are shorter, therefore of less: depth, and weight, resultingin further. economy of material not only in'the. floor system, but also inthe main girders,.supp'orts, rollers, tracks and toundations.

The operationofthe. separate sectionsis exceedingly, easy because of their lighter weight The cost of the opera ting machinery may therefore. be. considerably less that that of such machinery onknown types t bridges. The operating cost will. becorre-. spondingly less. Also the efiortrequired to turn the-bridge by hand in. case. ofemergency will be: much lessthan. thatv required for a.

bridge consisting of a. singlemoving structure of. considerably more than twice. the W g v .7 7 It will also be realized that. only part (for instance, one longitudinal segment) of the. bridge need be. builtat first, and that the other. part need be builtonly when: sufli'cient traffic develops to. I warrant. the addition. Further, more units stilI may I tor-the bridge as illustrated in Fig. 7,,to take care of. even greater traiiid'. The smaller units; can bemoreaquickly erected .than zc'an larger units hence thepartial' bridge'can be put in service sooneraft'er a decisionto build it is"reachedthanwouldbe th'egcase with other types of-bridges,v and whilein use two" more segments: one. on the outside of each oftlie:original segments."

The examples here. described fand illus-' trated arelmerelyfgijven .to indicatehow the invention mayfbe. applied; Other embodi mentsfwhich 'fallliwitliin the. proper scope of the. invention Qwillreadily' occur to those later be added too I claim: o

1. A swing bridge formed in two longitudinal segments and pivots at diagonally opposite corners of the segments aboutwhich the respective segments swing.

2. A swing bridge formed in two longitudinal segments, and pivotsat opposite ends of the bridge at opposite outer corners of the respective segments about which the latter swing.

3. A swing bridge formed'in two longitudinal segments each comprising a plurality;

of longitudinal main girders, and a pivot at 1 one end of one outer main girder and another pivot at the opposite end of the other outer main girder, said pivots being the points about which the respective segments swing, in combination with a counterweighted balance irder supporting the inner main girder of each segment at an intermediate point thereon. g v V 4. A swing skew bridge comprising a plurality of longitudinal segments, each segment being pivoted for horizontal swinging at its most inland corner, substantially as described, 7 g

5. A swing skew bridge formed in two 1011; gitudinal segments, eachv segment compris-, ing an outer longitudinal main girder and an inner longitudinal main girder which is shorter than said outer main girder, each of said outer main girders being supported at an intermediate point upon an arcuate track, and

each of said inner main girders being supported at an intermediate point byia counterweighted balance beam. 7

6. A swing skew bridge formed in two longitudinal segments, each segment comprising an outer longitudinal main girder and an inincombination with a counterweighted bal- V ance girder supporting the inner main gird.- er ofAeach segment.

longitudinal segments, each" segment com- ,swing skewbridge formed intwo prising. an outer longitudinal main. girder and an inner longitudinal main girder, each of said outer main at an intermediate track, and each of being supported by ance beam. a

10. A skew swing bridge comprising a 1011-.

said inner main girders a counterweighted balgitudinal segment having onejend approximately at right angles to its length, crossing said end which is the moredistant from the channeL- g 11. A skew swing bridge comprisinga longitudinal segment having one end approxi girders being supported point upon an arcuate so A a channel and being pivoted at the corner of L matelyvat right angles toits length, crossing a channel and being pivoted at the corner of said; end which is the more distant from the 7 channel, said segment beingadapted to cooperate with one or more similar segments to form a bridge wider than said'segment;

In testimony whereof I have signed my name to this specification. V FREDERICK AUBYANSEN,

ner longitudinal main girder which is shorter at an intermediate point bya counterweighted balance beam and a pivot about which each segment swings at one end of its outer longif tudinal main scribed. V

7. In a counterweightedjswing bridge, two

girder, substantially as de- I longitudinal segments, pivots at opposite ends g V p of the bridge and at opposite outer corners of the respective segments aboutwhich the segments swing, anchoragesin which said pivots are fast, and a foundation carrying each anchorage, said p1vots,anchorages and foundations acting as counterweights for their respective segments. V

8. A swing bridge formedintwo longitu= din-a1 segments each comprlslng a one end of one outer main girder and another plurality i of longitudinal main girders, anda'pivot at

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