US1157449A

US1157449A - Bridge.

Info

Publication number: US1157449A
Application number: US44251608A
Authority: US
Inventors: Joseph B Strauss
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-07-08
Filing date: 1908-07-08
Publication date: 1915-10-19
Anticipated expiration: 1932-10-19

Description

. J. B. STRAUSS.

BRIDGE.

APPLICATION FILED JULY 8, I908.

1,157349. Patented Oct. 19, 1915.

Mia/gym I JOSEPH-B. STRAUSS, OF CHICAGO, ILLINOIS.

BRIDGE.

Application filed July a, 1908.

Qhicagoyin the county of Cook and State of Illinois,

have invented a certain new and useful Improvement in Bridges, of which the following is a specification.

This invention relates to bridges, and has for its object to providea new and improved bridge of which the following is a description, reference being had to the accompanying drawings, wherein,

igure 1 is a side elevation of a bridge embodying the invention; Fig. 2 is an enlarged view of a portion of the bridge support; Fig. 3 is an enlarged side elevation showing the upper connection of the sections of the bridge; Fig. 4 is a plan view of the connection shown in Fig. 3; Fig. 5 is an enlarged side elevation showing the lower connection of the sections of the bridge; Fig. 6 is a sectional view taken on line 6-6 of Fig. 5; Fig. 7 is a view showing a modified construction of the bottom connection of the bridge sections.

Like figures refer to like parts out the several figures.'-

Referring now to Fig. 1, I have shown two sections 1 and 2 which are pivoted at 3 throughat their ends or heels to a suitable support. These sections are connected together so as to form a simple span when in their lowered or operative posltion. The sections are ar- -ranged so that they may be opened by moving them about their pivotal connections, but when. lowered the ends are connected together by a suitable connection which takes compression, shear and tension, thus formin a simple span.

s illustrated in Figs. 3 and 4c, the top chord 4 of section 1 is provided with a projection 5 which fits into a receiving space 6 associated with the top chord 7 ofsection 2, the arrangement being such that the proj ection becomes freely disengaged as the sections are lifted. This connection takes up compression. I

Some means is provided at the bottom of sections 1 and 2 to resist tension. As shown in Figs. 5 and 6 a longitudinally disposed interlocking connecting device consisting of an engagin part 8 connected. with one section of the lo thereof with an enlarged end or head 9 which fits into a receiving part 10 on the other section of the bridge as the sections are Specification of Letters Patent.

ridge in the tension .chord Patented Oct. 19, 1915. Serial No. 442,516.

lowered to their closed position. The receiv ing part is provided with an enlarged receiving space 11 in which the enlarged end 9 is received, there being a smaller receiving space 12 which receives the reduced portion 13 of the engaging part 8, the arrangement being such that when the parts'are engaged they cannot be pulled apart longitudinally,

or, in other words, the engagement is such as to resist tension in the members. The

parts

8 and 10 may be pivoted to the sections 1 and 2 or affixed thereto in any other desired manner.

It will be seen that this construction permits the automatic engagement and disengagement of these parts when the sections are moved about their pivots 3. A suitable device is preferably provided to prevent the movement of the

parts

8 and 10 when in their engaging position. Any suitable. arrangement for this purpose may be provided. As herein shown there are connected with the members 1 and 2 the links 14: and 15. These links are pivoted to a controlling part 16 by means of which pressure can be applied to them to tend to move them into alinement. One part is pivoted to the member 1, for example, and the other part is provided with a fork which engages a pin or projection 17 On the other part. This arrangement permits the disengagement of the parts when the sections are lifted. The part 16 may be operated in any desired manner,

in Fig. 5 and the controlling part forced downward, the lower ends of the sections are forced away from the other so as to cause the parts 8 and 10- to clamp each other. This prevents relative movement of such parts. The separation at the bottom ot the sections 1 and 2 tends to bring said sections closer together at'the top. It will thus. be seen that the ends of the sections 1 and 2 abut, and that the engaging parts form a connection between them which takes up compression, shear'and tension, and thus a simple bridge span is formed when the twosections are closed.

In Fig. -7 a modified form of the bottom connection is-shown. In this construction changes in temperature.

one of the sections is provided with one or more screws 19 which work in threaded portions 20 in one section, and threaded portions 21 in the other section. When the sections are closed these screws are moved into the position shown in Fig. 7. When it is desired to open the sections the screws are turned so'as to disconnect. them from the threaded portions 21. Any suitable means for operating the screws may be used, as, for example, the electric motor 22. The sections 1 and 2 may be placed in position and used as an ordinary fixed span, and may then be converted into a bascule bridge at any later period by simply adding mechanism for lifting one or more of the sections, and adding counterweight thereto. This mechanism may be of any desired construction. As herein shown a support or tower 23 may be provided at one or both ends and mounted upon suitable piers 24. Pivotally connected to these supports or towers are the counterweight frames 25 provided with the counterweight 26 and connected tothe sections 1 and 2 by the pivoted connecting struts 27. Operating struts 28 are pivotally connected to the towers 23 and engage pinions 29 on the bridge sections, said struts having teeth as shown'to engage such pinion. A motor or other suitable operating mechanism for each pinion is placed upon the sections 1 and 2, the arrangement being such that when the operating mechanism is set in motion the sections of the bridge are lifted so as to open the channel. In view of the fact that the two sections form a simple span when closed, some suitable means should be provided for permitting expansion due to As herein shown, one of the supports or towers 23 is movably mounted so that it may move to permit this expansion when it occurs in either or both sections. Some suitable means is preferably provided to fix the tower or support when it is desired to lift the section of the bridge pivoted thereto.

As herein shown the support or tower 23 is loosely mounted upon the piers 24 in any desired manner, as, for example, by being mounted upon the rollers or balls 30. The

support or tower 23 is provided with a locking part 31 which projects between the fixed parts 32 associated with the fixed member 33. Movable wedges 34 are provided which engage the fixed parts 32, the arrangement bein such that .when the movable wedges are owered the tower is free to move back and forth in response to the expansion of the material in' the sections of the bridge. hen it is desired to lift the sections of the bridge these wedges are moved to their looking position as shown in Fig. 2, thus fixing the support or tower in position. The bridge can then be easily lifted. Before moving the wedges to their locking position,

the section 1 may be moved toward the sec- "such that when said operating strut is moved they will be moved to their locking position. As herein shown said wedges are connected to an equalizing bar 35 which in turn is connected to a pivoted lever 36, said lever being connected by a link 37 with the projecting end of the operating strut 29.

When the section 1 is lifted the wedges are pulled to their locking position and the towers fixed in position. By means of this construction a double span bascule bridge is provided which does away with the uplift upon the foundations present in the ordinary double span bascule bridge. The expansion due to variations in temperature of one member is transferred to the other member and taken up at a distance from the connection between the abutting ends of the sections.

.The interlocking device or parts, which separably connect the abutting ends of the sections, that is, the

parts

8 and 10, are parallel to the axis of the bridge, that is, the longitudinal line running through the center thereof.

I claim:

1. A bridge comprising two vertically rotatable sections having free ends which abut when the bridge is closed, a longitudinally disposed interlocking connecting device for said sections, comprising a part in the tension chord of one section and a second part in the tension chord of the other section, the two parts being in longitudinal alinement with each other when the bridge is closed, said two parts automatically engaging when the sections are closed, and resisting parts connected with said two parts for resisting longitudinal separation thereof under tension.

2. A bridge comprising two separable vertically rotatable sections having free ends which abut when the bridge is closed, the

other ends of said sections mounted upon parts of said interlocking connections di-.

rectlyengaging with each other when the said sections are closed. n 3. A bascule bridge comprising two pivoted sections, and automatic interlocking devices at theabutting ends of said sections which automatically interlock when the two ing device .on the other section adapted to receive said enlarged end, said projecting part and receiving-device pin-connected to the sections, said enlarged end moved into the receiving device by the relative movement of said sections.

5. A bridge comprising two sections, a connecting device for connecting the adjacent ends of said sections together comprising an interlocking tension connection in the tension chord of the sections, automatically connected and disconnected by the relative movement ofthe sections.

6. A bridge comprising two sections having their adjacent ends abutting when the bridge is closed, a compression connection in the compression chord of said sections, a tension connection in the tension chord of said sections, a movable support on which one section is mounted, and mechanism for relatively moving the sections toward and from each other while the sections are closed.

tension connection in to vary the pressure on the tension connection.

7 A bridge comprising two sections having their adjacent ends abutting when the bridge is closed, a compression connection in the compression chord of said sections, a the tension chord of said sections, a movable support on which one section is mounted, mechanism for relatively moving the sections toward and from each other While the sections are closed, to vary the pressure on the tension connection, a lock device operating mechanism for said sections, and an automatic controlling device for said lock device.

8. A bridge comprising two vertically movable sections, one end of eachsection mounted upon a support, the other ends of said sections abutting, two detachable connections between said sections, one a compression and shear interlocking connection at'the top chord and the other a tension interlocking connection at the bottom chord, said tension locking connection having interlocking parts which automatically interlock when the sections are moved to their closed positions.

JOSEPH B. STRAUSS.

lVitnesses EnNA K. REYNOLDS, SOPHIE B. WERNER.

for holding said movable support in a fixed position,