US1663359A

US1663359A - Bridge

Info

Publication number: US1663359A
Application number: US644526A
Authority: US
Inventors: Joseph B Strauss
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-06-11
Filing date: 1923-06-11
Publication date: 1928-03-20
Anticipated expiration: 1945-03-20

Description

March 20, 1928.

- J. B. STRAUSS BRIDGE Filed June 11, 1923 3 Sheets-Sheet 1 I 'NVENTOR 10.5121; 5. 'mmas March 20, 1928.

J; B. STRAUSS s Sheets-Sheet 2 ATTY6.

. rated the required distance.

- 4-4. of Fig. '1;

Patented Mar. 20, 1928.

UNITED STATES PATENT "OFFICE.

BRIDGE.

Application filed June 11,

.This invention relates to bascule bridges and has for its object to provide a new and improved bridge of this type. The invention has as a further object to provide an improved construction of the counterweight for the bridge, an improved means for connecting such counterweight in positionand an improved construction for supporting the main span of the bridge. The invention has other objects which are more particularly pointed out in the following description.

Referring now to the drawings: y I Fig. 1 is a View showing one form of device embodying the invention with parts of the counterweight removed to show the link connection thereto.

Fig. 2 is a sectional viewtaken on line 2-2 of Fig. 1. b

Fig. 8 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a sectional view taken on line Fig. 5 is an end View of the metal embedded in the counterweight.

Fig. 6 s a sectional view taken on line Fig. 4; Fig. 7 is a sectional view taken on line frame 7 7 of Fig. 4,

Fig. 8 is'a sectional view of the counterweight taken on line 8-8 of Fig. 1.w1th parts omitted.

Fig. 9 is an end view of the counterweight showing the system of reinforcing metal.

Like numerals refer to like parts throughout the several figures.

Referring now to the drawings, I'have shown a bascule bridge comprisinga moving leaf 1 having the trusses 2 which are" sepa- Each of these trusses is provided with a trunnion 3'. These trunnions are mounted in bearings 4. A

portion of the bridge projectsto the rear of these trunnions thereby form ng the tail end portion 5. The trunnions and the bearings 4 are supported upon a structural steel framework 6. This structural steel framework consists of two

members

7 and 8 on each side of the bridge between which the main trusses 2 are received as shown in Fig. 2. The

members

7 and 8 are tiedtogether by the bracing 9 and the frameworks 6 on the opposite sides of the roadway are tied together by the

bracings

10 and 11, see Figs. 2 and 3, thereby forming a strong, light and efiicient support for the bridge. The trusses 2 are provided with the racks 12 and these 1923. Serial No. 644,526..

racks engage with pinions13 which areconnected with a suitable motor so that when the motor is operated the pinions will be rotated so as to move the leaf about its pivotal support so as to open or close the bridge. The framework 6 which forms a support is provided with a front member 14, one on each side of the bridge, upon which arecarried the live load supports 15 which may be castings so that when the bridge is in its closed position the live load is. carried through these live load supports to the structural steel framework and thence to the piers: The bridve is provided with a counterweight 16. In this construction the counterweight is a concrete counterweight and is pin connected to the bridge. This concrete counterweight has embedded in it ametal frame 17 (see Fig. 4). This metal frame is preferablyin the form of a truss and has a bottom member 18 which extends entirely across.

Diagonal members 19 connect the'bottom member with a top member 20 which is shorter than the bottom member and does not extend the full width of the counterweight. This metal counterweight frame is embedded in the concrete of the counterweight and means areprovided for transmitting the wei ht of the embedded concrete to the meta frame, theloads from said metal frame being brou ht to the intersec through the strap mem ers and the trusses 2 so as to pivotally connect the counterweight with the trusses. The concrete of the counterweight is cut away at 23 for this purpose. i

It will thus be seen that the counterweight is pin connected or pivotally connected with the tail end-of the moving leaf. This counterweight is connected preferably on each side with the su port for the moving leaf by means of linlis 24. These'links are pivoted to the support 6 by means of the pins 25 and with the counterweight by means of the pins 26. The counterweight links are preferably attached to the metal frame which is embedded in the counterweight.

they are not directly below the center of the trunnions 3. In this construction the counterweight lin; 24 is parallel to a line extending between the center of the counterweight pin 22 and the trunnion 3 and the distance between the centers of the

link pins

25 and 26 is equal to the distance between the centers of the counterweight pins 22 and the trunnions ,3. Also the line between the centers of the counterweight pin 22 and the link pin 26 is parallel and equal in length to the line extending from the center of the trunnions to the center of the link pin 25.

vThe link pins, that is the pivots of the link,

and the counterweight pin or pivot and the trunnion of the movingleaf form the corners of a parallelogram and it will further be seen that the side of the parallelogram connecting the pivot of the counterweight and the trunnion of the moving leaf lies "wholly within the tail end of the leaf and the side of the parallelogram which connects the pivot of the counterweight and the pivot at one end of the link lies wholly within the counterweight. The counterweight is cut away at its sides at 30 (see Fig. 8) so that it can pass between the members 8 of the leaf supports. These cut away portions are made to also receive the counterweight links 24. This arrangement is such that when the bridge is opened a portion of the counterweight passes between the supports for the trunnions of the leaf. The concrete counterweight is providedwith secondary means connected with the metal frame for supporting the concrete. As herein illustrated (Fig. 9) this secondary. means consists of metal rods or pieces 30 which run lengthwise of the counterweight and. pieces 31 which run crosswise and pieces 32 which are continuous rods bent over the metal frame embedded in the counterweight and which are connected with the rods 31 and 30. At the outer walls of the counterweight there is a leinforcing metal niesh'33. Y

I have described in detail a particular construction embodying the invention but it is of course evident that the parts may be varied in many particulars without departing from the spirit of theinvention as embodied in the claims hereto appended, and I therefore do not limit myself to the particular construction shown.

I claim:

1. A bridge comprising a moving leaf having separated trusses trunnions upon which said trusses are mounted, a structural steel frame work, bearings for said trunnions carried by said frame work, a counterweight pivotally connected between the trusses of said leaf back of said trunnions, a link pivotally connected with said counterweight and said frame work below said trunnions, the pivots of said link and the counterweight and the the trunnions of the leaf forming the corners of a parallelogram.

2. A bridge comprising a moving lea-f having separated trusses trunnions upon which said trusses are mounted a structural steel frame work, bearings for said trunnions carried by said frame work, a counterweight pivotally connected between the trusses of said leaf back of said trunnions, a link pivotally connected with said counterweight and said frame work, below said trunnions, the pivots of said link and the counterweight and the trunnions of the leaf forming the corners of a parallelogram, the side of the parallelogram connecting the pivot of the counterweight and the trunnions of the leaf lying wholly within the tail end of the leaf and the line connecting the pivot of the counterweight and the pivot at one end of, the link lying wholly within the counterweight.

3. A bascule bridge comprising a movable leaf having separated trusses, trunnions upon which said trusses are mounted, a structural steel frame work, bearings for the trunnions carried thereby, said leaf provided with a tail end which projects to the rear of the trunnions, a concrete counterweight pivotally connected between said trusses at the tail end of said leaf, 2. metal frame embedded in said concrete counterweight, pivots connected with said frame and with the tail end of the leaf, a' link having a pivot at one end connected with the metal frame of said counterweight said link having a pivot at the other end connected with the metal frame work supporting the leaf trunnions the pivots of the link being below the pivots of the counterweight and the leaf.

4-. A bridge comprising a moving leaf having separated main trusses, trunnions connected with said trusses, supports upon which said trunnions are carried, a concrete counterweight, a metal frame embedded in said counterweight having separated top and bottom members, a link connecting the counterweight with the leaf support, said link connected with said bottom member, said counterweight metallic frame having side members connected with the bottom member and pins connecting said side members with said trusses.

5. A bridge comprising a moving leaf having separated main trusses, trunnions connected with said trusses, supports upon which said trunnions are carried, a concrete counterweight, a metal frame embedded in said counterweight havingseparated top and bottom members, a link connecting the counterweight with the leaf support, said link connected with said bottom member, said counterweight metallic frame having side members connected with the bottom member and pins connecting said side members with said trusses, so that the stresses are transmitted into said bottom member and means for distributing said stresses throughout said counterweight metallic frame.

6. A bridge comprising a moving leaf having separated main trusses, trunnions connected with said trusses, supports upon which said trunnions are carried, a concrete counterweight, a metal frame embedded in said counterweight having separated top and bottom members, diagonal members connecting the ends of the bottom member with the top member and with end members con-- nect-ed with the bottom member, said end members connected with said trusses. o

7. A bridge comprising a moving leaf having separated main trusses, trunnions' connected with said trusses, supports upon which said trunnions are carried, a concrete counterweight, a metal frame embedded in said counterweight having separated top and bottom members, diagonal members connecting the ends of the bottom member with the top member and with end members connected with the bottom member, said end members connected with said trusses, links connecting the counterweight with the support for the leaf, said links connected with said bottom member near the points where the diagonals connect therewith.

8. A bridge comprising a moving leaf, a support therefor, a concrete counterweight, a metallic frame embedded in said counterweight and having separated top and bottom members, said metallic frame connected with said leaf so as to support the counterweight, 1

said bottom member provided with separated projecting pin receiving parts, a pin mounted in said parts, a link connected with said pin said link pivotally connected with the support for theleaf.

Signed at Chicago, county of Cook, and

State of Illinois, this 24th day'of May, 1923.

JOSEPH B. STRAUSS.