US1633565A - Bascule bridge - Google Patents

Description

June 28; 41927. 1,633,565 l L. R. ASH ET AL BASCULE BRIDGE Filed Sept. 7', 1926' ll5QShese'cs--Sheet l- A, ,"lul ML! I f' /7 'ATTORNEY' K June 28, A1927.

l.. R. ASH ET AL BASCULE BRIDGE Filed Sept. 7, 19.26

L. R. ASH. ET AL BASCULE BRIDGE June 28, 1927. 1,633,565

Patented June 28, 1927. l j

.UNITED STATES 1,633,565 vPATENT oFFlcE.

LOUIS R. ASH, HENRY C. TAMMENVAND'HARRY HUNTER, Olli'V KANSAS CITY,

l BASCULE 'Application led VSeptember for the movable span when ,the bridge is closed; all without interference .with fthe trusses of the movable span.

In accomplishing these and other objects -of the invention, we have providedimproved details of structure, 'the'prefeiredforms of .which are illustrated in the accompanying drawings wherein:

Fig. 1 is'an elevation of a double span bascule bridgeequipped with our' improved supports;l

Fig. 2 isaplan lview ofabutting ends'of fixed and movable spans;

Fig. i3 is an enlarged vside elevationrof movable and fixed-'spana'in connectionwith the support, the bridge being shown in closed position;

Fig. 4 is a similar viewiof thesameparts asthey appear-when the bridge is open;

Fig. 5 is a transverse, -vertical section on the line 5 5, Fig. 2;

Fig. 6 is a transverse, `vertical sectionon Fig. 7 is a detailperspective view ofone of the trunnion posts.

Referring more in detail to the drawings:

'1, 2 designate fixed 'abutments at the op- V`positersides of a channel for supporting the movable spans of a bascule bridgeof 'any ordinary type, except -for the improvements hereinafter noted. v lVhile we have, in the principal figure o the drawing, indicatedvour improvements as applied to a double.spanbridge,they are not necessarilyvlimited to this type, but apJ plicableas well to a'single span'bridge, the supports being merely duplicated on each' of the abutments when used in connection with f abridge of the double span type. yFor that reason we will refer to but one of the supports'with the vunderstanding that Vsuch, de scription relates equally to both. n

Mounted on the abutment 1 are spaced trunnion posts, indicated generally by the numeral-3each ofthe posts vcomprising f spaced, paired columns 4 yand 5, mounted lin l M rssonm., f

BRIDGE.l

7, v192e. yserial No. 133,816.`

separate seats 6, 7 on a common baseAS, resting on and suitably secured tothe abutment, the yseatsbeing preferably cross-braced as at .9. The innerfand outer columns 4and-5fare cross-braced; at the top andfbottomiby ,angles ,10, .11- and plates 12 and 13, leavingxan opening 14 between the 4angles for a purpose presently s described.

Connected with the top of the outer column 5, by a gusset plate 15, is a forwardlydirected, diagonal brace 16,- resting -at its lower end in a seat lon the abutment land havingcrossfand diagonal braces-18 land 19 vrunning` from about its center to `connect with `the column 5, the ends of the crossbrace being seated between gusset l plates v20 on a diagonal and-21 on thecolumn'andlthe diagonall brace 19 preferably seating between theplates 2O onthe diagonal and in the seat 7 within which the lower end ofthe column is also located. Restingin a seat 22 onv the abutment land risingto aboutthe level of the-pivotbearingson inner and outer column, presently.` described, is la vertical brace `2.3.having diagonal sub-braces24 ,leading from about its center to Contact with the-in- -ner column 4, and horizontal subfbraees 25 and h26 leading to the column 4fthe endsof the sub-braces being seated between gusset plates 27, 28, 29, and v30 on the vertical brace and von the column 4 respectively.Y t

Onthe topsof the inner and outer columns 4 and 5 are pivot bearings 31, of -anysuitable type adapted for mounting the pivot members on the side trusses of a `movable bridge span. Y v Y Fixedto and extending rearwardly `from the inner column 4 are bracket membe1's32,

33, supporting an upright '34, and fixed tothe uprights 3.4 on thebracketsof-therespective trunnion posts is a girder 35 that, extends beneath the end of therfixed floor overfther counte1weight. The inner columns ofthe trunnion post --at opposite sides of the bridge are connected v and `braced'bygirts 36 and diagonals 37 -of vany suitable construction, in order to provided withpivot members 43,-whichseat l in the bearings 31 on the tops of the trunnion post columns, the side-trusses being in longitudinal alignment with the spaces between the columns of the respective trunnion posts and having members 44 extending from a point forwardly of the trunnion posts, through the openings 14 in said posts to the counter-weight 41, the spacing between the cross-bras 10 and 11 of the trunnion posts being sufiicient to allow the truss members 44 to play in said space during opening and closing movements of the span, without interference. Y

Between the side trusses 42 is a stop 45 arranged to contact the tops ofthe vertical braces 23 of the respective trunnion posts to support the leaf when the latter is in trafc carrying position.

, With the movable span constructed as described, mounted on a support employing our improvements, the end Vof the fixed floor over the counter weight is supported at all times from the brackets on the trunnion posts and the movable span has supplemental support on the upper ends of the vertical braces of the support when the bridge is closed. During opening or closing travel of the movable span, the rearwardly directed truss members travel through the trunnion posts without interference, and the counterweight moves in an arc beneath and rearwardly of the supplementalv fixed floor support, without interference therefrom.

It is apparent, therefore, that each of the movable span trusses may be supported in a balanced position on the spaced tr-unnion posts, and that the diagonal, cross and vertical braces employed in connection with the post columns absorb the various stresses to which the trunnion posts are subjected in the operation of a bridge ofi' this type.

Having thus described our invention, what we claim is new therein, and desire to secure by Letters Fatent is:

l. In a bascule bridge, spaced trunnion post-s, bearings on said-posts, a live load supporting member on and forward of the posts. an approach support extending in the opposite direction and supported by said posts, a movable span comprising side trusses and pivot members having mounting in said bearings, and a transverse girder connecting the 'trusses and adapted to sea-t on said supporting member when the span' is in load carrying position.

2. In a bascule bridge, spaced trunnion posts, each comprising` spaced inner and outer columns, bearings on the columns, a diagonal brace for the outer column of each post, a vertical brace for the inner column ot each post, terminating at substantially the level of the said bearings, a span movable between the outer columns of the trunnion posts and comprising side trusses. and

agirder connecting said trusses and seated on said vertical braces when the span is in load carrying position.

8. In a bascule bridge, spaced trunnion posts, each comprising spaced inner and outer columns, spaced transverse braces connecting the columns off each post, a diagonal brace Yfor each outer column, a vertical brace for each inner column, a span comprising side trusses having members movable between the columns ot' respective trunnion posts and between said transverse braces, and a transverse girder connecting said truss-es and seated on said vertical braces when the span is in load carrying posit-ion.'`

' 4.v In combination with the fixed and movable spans ot a bascule bridge, spaced trunnion posts, trusses on the movable span having pivot bearing on the trunnion posts, brackets on the trunnion posts between the trusses, and a girder on the-brackets supporting the end ot the fixed floor.

5. In connection with the fixed and movable spans-of a bascule bridge, spaced trunnion posts, Ieach comprising paired columns,

cross braced and provided with bearings,v

Vgirder on said brackets supporting the end of the fixed floor over the counter-weight,

'spaced cross braces for the columns, bearings on the columns, a movable span comprising side trusses having pivot members seated in said bearings and having members extending through the trunnion posts between the column braces, and a counterweight on the rear ends of said trusses lo-A cated beneath the fixed floorl and rearward of said supporting girders when the bridge is closed. 1

7. In a bascule bridge, a pair of trunnion posts, each comprising a pair of spaced columns, having post bearings and spaced croGs braces, diagonal braces for the outer columns, vertical braces for the inner columns terminating substantially at the level of the post bearings. fixed and movable spans having a floor break rearwardly ot the post mountings, rearwardly directed brackets on the inner columns, having a cross girder supporting the end of the fixed floor and side trusses on the movable span Vhaving members movable between the paired columns of the trunnion posts, other members s-eatable on said vertical braces, and a counter-Weight located beneath the fixed on the brackets supporting the end of the `loor back of the supporting girders when fixed floor. the bridge is closed. In testimony whereof We atlix our signa- 8. In combination with the fixed and tures.

5 movable spans of a bascule bridge spaced v e trunnon posts, trusseson the movable span LOUIS R. ASH. having pvot bearing on the trunnion posts, HENRY C. TAMMEN. brackets on the trunnon posts, and a grder HARRY G. HUNTER.

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