US731322A - Bascule-bridge. - Google Patents

Description

3 SHEETS-SHEET 1.

JnI//LtO/"J PATENTED JUNE 16, 1903. J. W. PAGE.

BASGULE BRIDGE.

APPLIOATIOH FILED NOV. 13, 1902.

K0 MODEL.

PATENTED JUNE 1651903.

J. W. PAGE.

BASGULE' BRIDGE.

APPLICATION FILED NOV. 13. 1902.

N0 MODEL.

SHEETS-SHEET 2.

PATENTED JUNE 16, 1903.

J. W. PAGE.

BASCULE BRIDGE.

APPLICATION FILED NOV. 13, 1902.

3 SHEETS-SHEET 3 u I llll 2:... A T! I N0 MODEL.

Patented June 16, 1903.

PATENT @FFICE.

JOHN W. PAGE, OF CHICAGO, ILLINOIS.

BASCVULE-BRIDGE.

$PECIFIGATION forming part Of Letters Patent N 0. 731,322, dated June 16, 1903. l Application filed November 18, 1902. Serial No. 131,080. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN W. PAGE, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bascule-Bridges, of which the following is a specification.

' My invention relates to certain new and useful improvements in bascule-bridges, the object being to provide a bridge in which the swinging span may be readily raised or lowered without the aid of powerful machinery, such as is ordinarily used to operate heavy bridges of this class.

To such end the invention consists in providing the bridge with a vertically-movable approach, partially or wholly supported by the main span and adapted to assist in coun- 'terbalancing the latter.

The invention relates. also-to mechanism for operating bridges of this class and to certain other minor details of construction, a description of which will be found in the following specification, and the essential features definitely pointed out in the claims.

In the drawings furnished herewith, Figure 1 is a side view of the bridge in its closed position. Fig. 2 is a plan thereof. Fig. 3 is a view, partly in side elevation and partly in longitudinal section, of the bridge in its raised position, the line of section being indicated at 3 3 in Fig. 2. Fig. at is a transverse vertical "section in line 4. 4 of Fig. 1. Fig. 5 is a longitudinal section in line 5 5 of Fig. 2. Fig. 6 is a detail vertical cross-section taken in the broken line 6 6 of Fig. 1, showinga certain roller and track. Fig. 7 is a detail plan of certain portions with parts broken out and illustrating the operating devices for raising and lowering the bridge. Fig. 8 is a detail vertical longitudinal section taken in the line 8 8 of Fig. 7. Fig. 9 is a detail vertical section in the line 9 9 of Fig. 8. Fig. 10 is a detail-horizontal section in the line 10 10 of Fig.8, and Fig. 11 is a perspective view of a nut or cross-head.

In the views, A A represent two piers or abutments upon which the bridge is supported. The abutment A may, if necessary, be placed in the stream of water, thereby allowing the current to flow uninterrupted between the piers A A. Uponsaid piers are supported caps or journal-plates a a, which are connected bylongitudinal stringersa a ,thereby maintaining a fixed relationship between the two pivots in the journal-plates. Upon these journal-plates are pivoted the oscillating leaf or approach B and main swinging span 0, respectively, both of which are capable of a suitable amount of oscillation I upon said pivots with respect to each other. The main span 0 is preferably composed of two side girders or stringers c o, suitably trussed and braced and connected by a roadway 0 and other suitable connecting and sup porting members 0 The oscillating leaf or approach is also made up of suitable girders or stringers b b b b, the girders being arranged in pairs, as shown, and on either side of the adjacent girder or stringer c c of the main span. The girders b b are also connected by a road way I) and suitable supporting members 5 Between each pair of the girders is journaled a roller 5 which rests and runs upon a suitable track on the main span. This track 7 is so shaped and positioned that the weight of the leaf tends to draw the main span up- I ward with a continually decreasing purchase until the main span reaches the point of equilibrium upon its pivot, at which point the weight of the leaf is sustained directly in line with the pivot of the span. Further upward or backward movement is resisted by the weight of the leaf. Thus the upward movement of the main span to the point of equilibrium lowers the leaf and movement beyond the point of equilibrium raises the leaf.

It will be noticed that in this construction the oscillating leaf is made up of plate-girders and heavy materials, while the main span is composed of open trusswork, and for this reason the angle of fall of the oscillating leaf is little over one-half the angle of movement of the main span. The upper end of the track 0 is carried around' the roller 5 and 5 forms a stop limiting the downward movement of the main span. The lower end of the track is also so shaped as to stop the upward movement of the main span.

Between each pair of girders is a shaft Z2 rco journaled in suitable bearings and having upon one end a beveled gear I), in mesh with with suitable straps g, encircling a similar gear I) upon a shaft which is driven by a suitable motor b The other end of the shaft 11 bears a spur-gear b, in mesh with a similar spur-gear d, fast upon the end of a screw D, This screw is journaled in suitable bearings d d (see Figs. 7 and 8,) the bearing d being secured upon the girders and the bearing d being supported by a bracket (i which is carried by a web (1 extending between the girders. A nut or cross-head E is threaded upon the screw and has projecting wings or shoes 6, (see Fig. 11,) traveling in guides F, secured upon the adjacent faces of the girders. The cross-heads are connected to the girders of the main span by operating-struts G, the struts being pivoted to the main span by means of pivots g and provided pivot-pins 6 upon the cross-heads.

It will be understood that by rotating the screw D in the nut E in one direction it will draw the operating-rod toward the rear end of the oscillating leaf and raise the main span of the bridge and by rotating it in the opposite direction will lower said span. Inasmuch as this screw is of considerable length, I have provided a strut e slidable upon said screw and guided in the guides F and connected to blocks 6 by a pair of rods e which pass through suitable openings in the wings or shoeseof the cross-head. (See Fig. 10.) It will be understood that as the screw is rotated to raise the bridge the cross-head will move toward the strut 8 until it strikes the same and then force the same along to the end of its movement. The cross-head in returning to its original position strikes the blocks 6 when about half-way back and returns the strut e to its original position. Thus it will be seen that the screw is normally supported midway tails of construction are possible, and I do not desire to limit myself to their specific construction.

I claim as new and desire to secure by Letters Patent- 1. The combination with a vertically-oscillating bridge provided with suitable tracks, of a vertically-oscillating leaf, suitable rollers thereon bearing on the tracks of said bridge, whereby the weight of the free end of said leaf is supported by said bridge, and said leaf acts as the main counterweight of said bridge, substantially as described.

2. The combination with a vertically-oscillating bridge, of a vertically-oscillating leaf forming a continuation thereof and having its free ends supported by said bridge, and means for forcibly drawing together the shore end of said leaf and a point on said bridge beyond its pivot, substantially as described.

3. In a device of the class described, the combination with a Vertically oscillating bridge and a vertically-oscillating leaf forming a continuation thereof, of an operatingstrut connected to said bridge beyond its pivotal point at one end, and connected at the other end to a suitable screw rotatably secured in said leaf, and means for rotating said screw to forcibly draw together the pivoted end of the leaf and the pointof attachment of said strut to said bridge to raise said bridge, substantially as described.

4. The combination with a vertically-oscillating bridge, of a vertically-oscillating leaf pivoted adjacentthereto,andformingacontinnation of said oscillating bridge, an operatingstrut connected to said bridge at one end and at the other to across-head threaded on a suitable screw rotatably secured in said leaf, said screw being provided with a suitable pinion, a second pinion in engagement with said first pinion, and means for rotating said second pinion, substantially as described.

5. The combination with a vertically-oscillating bridge, and a vertically-oscillating leaf forming a continuation thereof, of two operating-struts each secured at one end to said bridge on opposite sides thereof and each socured at the other end to suitable cross-heads threaded on screws rotatably mounted upon said leaf, a pinion secured to each of said screws, shafts in engagement with said pin ions, and a second shaft extending across said bridge and in engagement with both said shafts, and adapted to simultaneously rotate the same, substantially as described.

6. The combination with a bridge and a vertically-oscillating leaf, of an operating-strut connected at one end to said bridge and at the other threaded upon the rotatable screw extending through a suitable channel in said leaf, of astrutsurrounding said screw at substantially its medial point, and adapted to prevent the same from sagging, substantially as described.

7. The combination with a vertically-oscillating bridge, and a vertically-oscillating leaf forming a continuation thereof, of an operating-strut pivoted at one end to said bridge, a cross-head secured to said strut, a screw rotatably secured in said leaf and threaded in said cross head, a strut surrounding said screw and adapted to prevent the same from sagging, and suitable means for limiting the distance of said strut and said cross-head, substantially as described.

8. The combination with a vertically-oscillating bridge and a vertically-oscillating leaf forming a continuation thereof, of an operating-strut pivoted at one end to saidbridge, a cross-head secured to said strut, a screw rotatably secured in said leaf and threaded in said cross head, a strut surrounding said screw, and adapted to prevent the same from sagging, and a suitable rod sliding in said ICC strut and cross-head and adapted to limit the distance between said strut and cross-head, substantially as described.

9. .In a bridge, the combination with a vertically-oscillating bridge-span and a vertically-oscillating leaf forming a continuation of the span when in line therewith, of a movable connection between the two, so arranged that the oscillating leaf assists in counterbalancing the weight of the span in certain positions, substantially as described.

10. The combination with a vertically-oscillating bridge-span, the center of gravity of which swings from one side to the other of its point of support, of a vertically-oscillating leaf forming a continuation of the bridgespan when the latter is down, and suitable connections between the leaf and the span,

whereby the leaf assists in counterbalancing the bridge in one direction when the bridge is down and in the opposite direction when the bridge is up, substantially as described.

11. In a bridge, the combination with avertically-oscillating bridge-span and a verti-

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