US1170703A

US1170703A - Double-deck bascule-bridge.

Info

Publication number: US1170703A
Application number: US42193008A
Authority: US
Inventors: Joseph B Strauss
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-03-18
Filing date: 1908-03-18
Publication date: 1916-02-08
Anticipated expiration: 1933-02-08

Description

1. B. STRAUSS.

DOUBLE DECK BASCULE BRIDGE.

APPLlCATlON FLD MAR. I8, 190B.

Patented Feb. 8, 19H5.

2 SHEETS-SHEET I.

l, I 74/ gf/MVK *L B. STRAUSS.

DOUBLE DECK BASCULE BRIDGE.

APPLICATION FILED MAR. I8, 1908.

Patented Feb, 8, 1916.

L'Ifmys,

JOSEPH B.

STRAUSS, OF CHICAGO, ILLINOIS.

DOUBLE-DECK BASCULE-BRIDGE.

To all 'whom z'zf may concern.'

Be it known that I, JOSEPH B. citizen ofthe United cago, in the county Illinois, have invented a certain new and useful Improvement in Double-Deck Bascule-Bridges, of which the following is a specification. I

This invention relates to bascule bridges, and has for its object to provide a new and improved bridge of this description having twodecks or thoroughfares in different hori* zontal planes.

The invention is illustrated in the accompanying drawings, wherein- Figure l is a view'showing a doubleleaf bridge embodying my invention; Fig. 2 is a sectional view on line 2-2 of Fig. l; Fig. 3 is a sectional view taken on line 3-3 of Fig. l; Fig. 4 is an enlarged sectional view S'rlzAUss, a States, resldmg at Chithrough one `of the rail supporting girders;

Fig. 5 is a view of one form of bumper; Fig. 6 isa sectional view taken on line 6-6 of Fig. 5; Fig. 7 is a view showing a modified form of bumper.

Like letters refer to like parts throughout the several figures.

vReferring now to the drawings, I have shown in Fig. l a double leaf bascule bridge. The two leaves are practically duplicates, and I will/therefore In this construction the main leaf 1 may be of any'desired construction, and is mounted upon suitable trunnio i so that it may be lifted and lowered. Sultable supporting devices 2 are mounted upon proper foundations, and the main trusses or girders 3 of the main leaf are connected thereto by trunnions 4. The trusses 3 are semi-through trusses and projectabove the Hoor, but not above the clearance line. If desired a suitable walk 5 for' pedestrians may be'located atlthe" side of the main leaf, as shown in Figs. 2 and 3. In this construction the main .girders 3 are provided with a series of sidewalk brackets 6, connectedto the side-walk iary leaf 10 located in girders 7. These sidewalk "girders are pivoted at one end tothe braces 8 fastenedto with the main leaf is a secondary or auxila different horizontal plaine from the main leaf, and preferably above it, the two leaves being 'pivotally com neetedtogethen* The auxiliary leaf is pivv oted at one end to the inainsupportingfdey Specification of Letters Patent. Application filed March 18, 1908.

of Cook and State of describe one of them.-

wvhich if desired may be devices 2 by means of` suitable pivots or trunm'ons 9. Associated Patented nee. s, reis. serial Np. 421,930.

vices 2, the pivots therefor being in the same ferftical line with the pivots for the main The main supporting devices 2 are enlarged at their upper ends and have pivoted thereto by pivots l2 the two the auxiliary leaf. These grders carry the rails 13 which are used when the auxiliary leaf is arranged to be used for street, elevated or railway ears, or the like. Supporting posts 14.- are provided at intervals pivotally` connecting the two leaves together. l hese posts preferably connect the leaves together at the panel points as shown. rlhese supporting posts are iiared or enlarged at their upper end like the main supports 2 and the girders ll carrying the rails are pivoted thereto see Fig. 2). Theposts on each side of the bridge are connected together in any desired manner, as by the connecting pieces 1 5. The supporting posts are also connected by pivots girders 3 of the main leaf. -Vifhen' the side- Walk is used these supporting posts are pro: vided with lateral projections 18 to which are pivoted the sidewalk girders 7. The side-walk 5 issuitably mounted on the

girders

7 and 20, and a suitable hand-rail 2l is provided. One form of the girders 1l is illustrated. in Fig. 4, wherein'such girders are shown as made up of. pieces. The top ianges of the gir-dersV are provided with bent plates 22which are connected together at intervals at the top by straps In the V thus formed, I place a bearing block2a supported upon some cushioning material 25. On the outstanding ends or legs ofthe flanges are placed suitable guard rails 26 which are bolted securely in position on the ianges. To stitfen these outstanding legs gusset plates 27 may be provided;

It will thus be seen that the rails are placed directly on the center line ofthe girders. This lightens the structure and secures 'great stability. When the main leaves are girders 1l of 17 to the main I center ofgravity of the structure remains l in the main trunnions of thenain leaf, and greater stability is secured. .This coi1str1m`` tion also does away with the heavyooi systesifetherwlse necessary, and permits an ornamental structure. The main girders 3 of the main leaf are connected together by the floor girders 28 which carry the floor 29.

with thetanchor post 45.

To provide for any unbalanced load I arrange a bumping; device at the tail end of the main leaf. ,This bumping device 1s illustrated in detail in Figs. 5 and 6. The

. rope 39 is connected to said lever. The main leaf is operated by means of the rack 40 and the gear 41. When the main leaf is closed the tail end strikes the bumper plate which tends to stop it. The striking of the g bumper plate moves it upwardly against the compression of the spring, and the pawl engages the teeth of the post 31 and holds it in this position, thus preventing the recoil 'ofthe spring against' the tail end of the main leaf. When the main leaf has come to rest the operator pulls the rope 3,9 and re- 80 leases the post 31, the spring moving it until the bumper plate engages the tail end of the leaf.

. In Fig. 7 a modified form of bumper device used with a single span bridge is shown. In

Athis construction the end of the leaf 48 farthest from the pivots is provided with inclined faces which engage inclined blocks 51, arranged to slide inaguiding and holding device 49 fastened to the pier. These blocks yare provided with springs 50 which act asa cushion. The end of the leaf is also pro-v vided with a centering pin 52 which engages a hole 53 in proper position to receive it. When the leaf .is closed the beveled faces on the endof the part 48 engage the beveled faces on the parts 51 and force the parts 51 back agalnst the pressure -of the springs 50.

It wlll be noted that in the construction ofP bridge herein illustrated the main leaf and the secondary leaf are separate and distinct from eachother, and are each provided A`with an independent set of girders,v these girders being connected together by posts extending between the girders or trusses at the panel oints. The supporting devices are prefera ly pin-connected to the girders. It will furth'er be noted that when the secondary leaf is used for cars it is provided with a Stringer having anupper flange 23 forming a direct rail support. It will also loe-noted that the supports 2 project between the two girders 11, such girders being sym- -metrically disposed thercabout, thus permitting the rails to be carried directly over the mam girders of the main leaf, the rails being directly supported upon the girders vof the secondary leaf. A counterweight 54 that the secondary leaf is` provided with a series of girders by means of which it is connected with the main leaf, there being cross connections between said vgirders at intervals, the spaces between said cross connections being open. l

Where I have used the term semi-through trusses I mean girders which project through the roadway ioor but are not cross connected above the roadway floor.

I claim: I

1. A bascule bridge comprising a main leaf and a secondary leaf in different horizontal planes, a support for said leaves to which they are pivotally connected at different points so as to rotate about different centers, whereby said leaves move relatively when thebridge is opened.

2. A bascule bridge comprising a main leaf and a secondary leaf, both pivoted to a stationary support, and pivoted posts connecting the two leaves together near the outer ends said posts pivoted to both leaves.

3. A bascule bridge comprising a main leaf and a secondary leaf both pivoted to a single support, the pivots thereof being in thesame vertical plane and means for moving the two leaves simultaneously.

4. A bascule bridge comprising a main leaf and a secondary leaf in different hori- `zontal planes, and pivotally connected to a the lower leafback of the pivotal point thereof to balance the weight of both leaves as they are moved about their pivotal points.

5. A bascule bridge comprising a main leaf and a secondary leaf mounted upon pivots and connected together, and a counterweight connected with one leaf back of the pivotal point thereof arranged to counterbalance the weight of both leaves as they' are moved about their pivotal points. Y

6. A bascule bridge comprising a main leaf and a secondary leaf, a fixed support to which they are pivoted, supporting posts movably connecting them together, said posts having flared tops, the girders of the secondary leaf connected to said flared tops andy extending at right angles thereto.

-7.'-A bascule bridge comprising a main leaf having longitudinal girders at each side support to which said Limena eaves are pivotally connected, posts upon which the secondary leaf is mounted, said posts connected with the trusses of the main leaf at separated points therealong by pivotal connections,

9. A bascule bridge comprising a main leaf, trusses upon which it is mounted, a secondary leaf above the main leaf, a fixed support to which said main and secondary leaves are pivotally connected, posts extending from the trusses of the mainleaf at the panel points and connecting with said secondary leaf, said posts connected to both leaves by pivotal connections.

l0. A bascule bridge comprising a inain leaf and a secondary leaf, one above the other, a fixed support to which said inain and secondary leaves are pivotally connected, each leaf provided with trusses, the lower trusses being below the level of the upper leaf, and connections between the two leaves so that one is supported upon the other.

1l. A. bascule bridge comprising a main leaii and a secondary leaf in different planes, a support to which they are pivoted, two gir-ders forming part of the secondary leaf, a support projecting between said girders and to which they are attached, and a connection between said support and the main l "af, i

main and secondary l2, A bascule bridge comprising a main leaf and a secondary leaf in different planes two girders forming part of the leaf, a .support therefor, one of the being` attached to each 'side of so as to be synunetrically disposed thereabout, and a connection between said support and the main leaf.

13. A bascule leaf and a secondary girders the support leaf in different planes, a support to which they are pivoted, two girders forming part of a support therefor, one of the girders being attached to each side of the support so as to be symmetrically disposed thereabout, the gil-ders being pivotally connected to the support, and a pivotal connection between said support and the main leaf.

14. A bascule bridge comprising a main leaf and a secondary leaf located in different planes, a fixed support to which said leaves are pivotally connected, posts extending between the two leaves`-v the ends of said posts pivotally connected with said leaves, means for moving one of said leaves about its pivotal connection, said posts transmitting the motion to the other leaf.

4JOSEPH B. STRAUSS.

Vlitnesses:

DONALD M,

Charna, EDNA K. REYNOLDS.

bridge comprisii'ig a .main

the secondary leaf,