US780193A - Bascule-bridge. - Google Patents

Description

NO- 780.193. PATENTED JAN. 17, 1905.

J. A. JOYCE.

BASGULE BRIDGE.

APPLIDATIGN FILED SEPT. 29, 1904.

2 SEEETS-SHEET 1.

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ire Brass Patented January 17, 1905.

JAMES A. JOYCE, @E CLEVELAND, UHIO.

BASCUl..llEBHiDGE.

SPECIFICATION forming part of Letters Patent No. I780,193, dated January 1*?, 1905.

Application filed September 29, 1904:. Serial No. 226,520.

To all, whom t iii/(ry con/cern:

Be it known that I, JAMES A. J oren, a citizen of the United States. residing at Cleveland, in the county of Cuyahoga and State of Uhio, have invented new and useful Improvements in Bascule-Bridges, of which the following is a specification.

My invention relates more particularly to bascule-brid ges with vertically-moving leaves whose free ends join at the middle when the bridge is closed and ready to receive traffic.

My principal object is to provide an improved means by which the meeting ends of the vertically-moving leaves may be freely and easily joined together so that the stresses may be transmitted from one to the other and so that the change in length of the vertically-moving' leaves due to the change of temperature may be freely made and so that the friction in joining the free ends may be reduced to a minimum.

In the accompanyingl drawings, which illustrate my invention, similar letters of reference represent corresponding parts in the various views.

Figure l shows a side elevation of the two ends of a bridge with vertically moving leaves. Fig. 2 shows a top view of Fig. l. Eig. 3 shows a sectional View of Fig. l looking from the middle toward the verticallymoving leaf A. Eig. A shows a sectional View of Eig. l looking from the middle toward the vertically-moving leaf B. Fig. 5 shows a side elevation of a bascule-bridge with the pier supporting the bridge and the general arrangement of the joining together of the leaves. Fig. 6 shows contact-switches.

A represents the end of one of the vertically-moving leaves of a bascule-bridge, and B represents the correspondingend. These leaves are alike except at the adjoining ends and are usually formed with a plurality of trusses or girders which support the floor system. Leaf A is of structural-metal con struction. designed as in ordinary practice and having a tongue Al projecting from the end of the same. The tongue A' is designed to interlock with the double tongue B. and the said tongue A' is arranged to rest and roll on the roller B2 at the end of leaf B. Leaf B is of same construction as leaf A and having a double tongue B projecting from the end of the same. The double tongues B are designed to interlock with the single tongue A', and the said double tongues B are arranged to rest and roll on the rollers A2. When the free ends of the leaves join together at the middle when closing, the tongue of one leaf rests on the roller of the other, and the sides of the tongues are slightly beveled to guide them in joining together. The rollers may have bevel-grooves cut in their faces and the tongues beveled to correspond with the rollers, which may be used as aineans of guiding the free ends of the leaves together. After the free ends of the leaves are joined suiiiciently to let the tongues rest on the rollers the free ends of the two leaves roll together to a final horizontal position, and when expansion or contraction takes place the roller acts as an antifriction means of taking care of the changes in length due to changes of temperature. As the tongue of one leaf rests on rollers of the other, any vertical sheer due to partial loading' may be properly transmitted from one leaf to the other, and by the tongues bearing against each other transversely any unbalanced wind-load may be transmitted from one leaf to the other, or the rollers may be grooved and the tongues beveled to correspond with the rollers. This would provide for the transmission of transverse or unbalanced wind-load.

In operating the bridge the leaves A and B are raised simultaneously to any desired height up to the limiting-points, where they are automatically stopped by engaging an electric switch S and S, which shuts olf the current and sets a brake on the motel'. 1n the closing of the bridge a switch in the operators house is thrown by the operator to release the brakes on the motors and throw on the current to reverse the motors to run for the closing of the leaves. The leaves A and B are simultaneously lowered until the leaf A reaches an intermediate position that will just allow the leaf B to pass the leaf A without striking it. When this position is reached, the leaf A is automatically stopped by engaging switch S2 and S3, and the leaf B continues IOOy on its downward movement until it reaches an intermediate position, where the tongue A on leaf A will when further lowered come in contact with the upper side of roller B2. At this position leaf B is automatically stopped and leaf A is automatically started down by engaging switches S* and S5. Just before tongue A' reaches roller B2 the brake on leaf B is released by the switch S6 and S7, so that when the tongue A rests and rolls on the rollers B2 the tongue B/ rests and rolls on the rollers A', thus causing the two ends to roll in together as they are lowered to their iinal position. These rollers make it much easier to bring the interlocking ends together and also provides a roller-bearing' for the various movements that take place at the middle of a lift-bridge, such as expansion and contraction and stretch in the girders or trusses under diiferent conditions of loading.

It is plainly evidentthat my invention may be modified in minor details, such as rounding the corners of the interlocking tongues, making' V -shaped faces in the rollers, and tongues arranged to slide in the same. The spirit of my invention is intended to include such changes.

It is not my intention to cover the combination of electric switches in this application, but I will make separate application for same. I have introduced them here to clarify my description of the operation. of the center sheer-lock, and the switches are merely marked where they come, which when engaged one to the other cuts oiil or completes an electric circuit to accomplish the purpose as described. The movements of the leaves as outlined here are controlled by electric motors. Steam-engines or gas-engines may be substituted as circumstances may require.

rollers and a projecting tongue at the end of the corresponding vertically-moving leaves, the tongues of the leaves arranged to interlock and rest and roll on rollers of the corresponding leaves substantially as shown and described.

2. In a bridge of the class mentioned having two vertically-moving leaves meeting at their free ends, the combination of these leaves with single and double tongues having bottom roller bearings, lateral bearings, curved or beveled jaws on the tongues, arranged to rest and roll when the two leaves are interlocked substantially as shown and described.

3. In a bridge of the class mentioned having two vertically-moving leaves meeting at their free ends, a roller with V-shaped face, a plurality of projecting tongues at the free end of one of the verticallymoving leaves, arranged to fit in V-shaped faces of rollers, a plurality of rollers having V-shaped faces and a projecting tongue arranged to fit in V- shaped faces of rollers at the end of the corresponding vertically-moving leaves, the tongues of the leaves arranged to interlock and rest and roll on rollers of corresponding leaves, substantially as shown and described.

JAMES A. JOYCE.

Writnesses:

R. W. BUss, T. MALEY.

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