US2041210A - Road joint and filler bridge unit with asphalt lock - Google Patents

Description

May 19, 1936. R. R. ROBERTSON ROAD JOINT AND FILLER BRIDGE. UNIT WITH ASPHALT LOG K ZSheets-Sheet 1 Filed Feb. 21, 1934 Bier? fi/Pafirr/kon.

May 19, 1936, R. R. ROBERTSON 2,041,210

ROAD JOINT AND FILLER BRIDGE UNIT WITH ASPHALT LOCK Filed Feb. 21, 1934 2 Sheets$heet 2 Patented may i, 193% RQAD .WNINT FllLlLlER BR GE Wl'lilli ASPHALT LOCK Robert R. Robertson, Chicago, ill, assignor to The 'llranslode Joint Company, Chicago, Ml...

a corporation of llllinois Application February 21, 1934, Serial No. W227i 20 Claims.

This invention relates to road joints and more particularly to a road joint filler bridge unit with an asphalt lock for use in combination with transload air expansion joints including a transload base and a removable core on which the bridge supporting socket strips are releasably supported during the pouring of concrete.

The present invention relates more particularly to an improved road joint filler bridge unit which is mounted in position to bridge across the upper portion of an air expansion joint void to permit the groove or. crack disposed above the bridge unit to be filled with a filling of asphalt or the like which also serves as a lock between the bridge unit and the socket supports therefor.

It is an object of this invention to provide an expansion joint bridge unit wherein socket units which are temporarily carried by a removable core are left partially imbedded in opposite concrete sections of a road to'provide a support for a bridge member which bridges the air gap between' the road sections and aifords a support for an asphalt filling to fill the void above the bridge unit and serve as a locking means between the end margins of the bridge member and the socket units.

It is also an object of this invention to provide an expansion joint void spanning unit including supporting sockets and a bridge member which are locked together by means of an expansible filling material.

Another object of the invention is to provide an expansion joint mechanism wherein bridge supporting sockets are releasably carried between removable core plates and a core cap to be partially imbedded in concrete permitting removal of the core plates and the core cap to leave a void between sections allowing the void to be spanned by a bridge unit'supported in'the sockets and interlocked therewith by means of a filling of an expansible material which closes the crackv between the road sections and above the bridge member.

It is furthermore an object'of this invention to provide a transload expansion joint forming mechanism including core plates and a core cap for releasably clamping and temporarily holding adjustable socket units in place after the pouring of concrete when the core plates and core cap are removed leavin the socket units in position to receive an expandible bridge unit the ends of which are adapted to be interlocked with the socket units by means of a filling of an expansible material which is deposited to fill in the upper portion of the expansion space and join the upper portions ofthe concrete sections.

Still another object of the invention is the provision of an air expansion joint including a transload base for supporting a removable core unit including aligned core plates forming opposite sides of the core unit together with strap plates positioned to overlap the abutting margins of the coreplates with said core unit being so formed that with the aid of removable caps, socket units are temporarily supported in place to be left partially imbedded in concrete sections of the road with the removal of the core forming members, whereby the socket members are positioned to receive an expansible bridge unit spanning the space between the concrete sections and forming a support for an expansible filling material to not only close the crack between the upper edges of the concrete sections but also act as a locking means for interlocking the side margins of the bridge member with the bridge sup porting socket members.

Another object of the invention is the provision of an air expansion joint bridging unit including sockets partially imbedded in opposite sections of a road and projecting into the expansion space between the road sections to receive the side margins of an arched bridge for separating the lower portion of the expansion space from the upper portion and also servin as a support for a plastic material which serves space and acts as a locking means between the sockets and the side margins of the arched bridge. It is an important object of the invention t provide an air expansion joint bridge unit consisting of side sockets partially imbedded in opposite sections of the concrete road and projecting into the expansion space to receive the side margins of an arched bridge member provided with apertures which together with apertures provided in the socket members permit a filling of a bituminous material to fill the space above the bridge member and flow into the sockets to fill the apertures in the sockets and in the bridge member thereby forming a lock between the sockets and the bridge member to forml a closure for the upper portion of the expansion space which will adjust itself with the expansion and contraction of the road sections.

Another important object of .the invention is the provision of an improved type of road joint which interflt one another and are locked tocrack between the upper margins of the road secbridge supporting sockets embedded in concrete concrete sections of the road after the removal tions.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

n the drawings:

Figure 1 is a fragmentary top plan view of a concrete road having read joint formers imbedded transversely in the road at spaced intervals with the expansion joint including an improved road joint filler bridge unit with asphalt lock embodying the principles of this invention.

Figure 2 is a fragmentary top plan view of a load transmission air expansion joint including removable core members for temporarily carrying bridge supporting socket units in position for mounting in opposite sections of a concrete road.

Figure 3 is a fragmentary vertical side view of the load transmission air expansion joint mechanism illustrated in Figure 2.

Figure 4 is an enlarged fragmentary perspective view of the arched bridge member interfitting with a fragmentary portion of one of the bridge member supporting sockets or channel units.

Figure 5 is an enlarged vertical detail section taken on line VV of Figure 3 illustrating the expansion joint base unit, core members and prior to the removal of the core plates and caps to leave the base unit and the bridge supporting sockets in the concrete.

Figure 6 is an enlarged vertical detail section taken on line VI-VI of Figure 3 illustrating in section the crack spanning strap plates and caps for spanning the space between the abutting edges of core plates and caps.

Figure '7 is an enlarged fragmentary detailed section of the upper portion of the joint void showing the bridge supporting sockets or channel members left partially imbedded in opposite of the core members, and furthermore showing by means of dotted line the open positions of the socket flanges to faci itate the insertion of a spanning bridge member in position.

Figure 8 is a similar sectional view after the core unit has been removed leaving the socket or channel members partially imbedded in the concrete sections to afford a support for the arched bridge member, and the plastic filler material which not only fills the sockets but also fills the apertures in the sockets and in the bridge member to afford a locking arrangement for holding the air expansion void closed at its upper portion.

filling of plastic material to form a lock between v the bridge member and the supporting sockets.

As shown on the drawings: The reference numeral I indicates a road' subgrade upon which the concrete upper or crown section of the road is supported. The crown portion of the road is formed with a longitudinal center joint 2 and with spaced transverse load transmission air expansion joints 3' between which transverse contraction joints 4 are positioned. The center joint and the expansion and contraction joints in the upper portion of the concrete road divide the same into a plurality of adjacently positioned concrete sections 5 which are permitted to expand and contract with temperature changes. I

The present invention relates to an improved type of an air expansion joint including in its construction an improved removable core unit together with an improved bridge unit for spanning the expansion void and supporting a filling of a bituminous or plastic material which also acts as a locking means between the bridge memher and the socket or channel supports therefor.

The improved road joint former or load transmission joint mechanism of the present invention is adapted for use in a concrete construction for the purpose of providing suitable expansion joints between different sections of the construction and furthermore afford means in the form of a base unit whereby adjacent sections of the construction are interconnected by a shiftable anchoring unit in which the core forming plates are. temporarily supported for holding bridge supporting members in place until after the pouring of concrete.

The base unit of the road joint former serves as a load transmission mechanism between the adjacent sections of the concrete road and in the present showing comprises an elongated base member consisting of a solid base plate 6 constructed of sheet metal or other suitable material. The longitudinal margins of the base plate 6 are bent upwardly and then inwardly toward one another to form oppositely positioned guide channels I. The guide channels I of the base unit provide oppositely positioned guide grooves 8. The margins of the top plates of the guide channels 1 are bent upwardly and are cut away to provide spaced upwardly projecting retaining flanges or fingers 9. The retaining flanges 9 on opposite sidesof the base unit are staggered with respect to one another. The upwardly projecting retaining flanges 9 of the base unit are spaced apart as illustrated in Figures 5 and 6 to provide a longitudinal top opening in the base member of the device. The grooved or channel base member is provided in a standard length of half of the width of the road and as clearly illustrated in Figures 2 and 3 two base members,v are provided in alignment to span the width of the road and the inner ends of the base members are disposed adjacent to one another with'the crack between the same closed as hereinafter more fully described by means of closure members which overlap the inner ends of the base members.

The load transmitting mechanism associated with the base unit consists of a plurality of anchor shoes or holder sections which are movably or shiftably engaged in the base section and are arranged longitudinally in offset or staggered relation with respect to one another. The anchor shoes or holders are of substantially identical construction and are arranged with the adjacent the anchor shoes is constructed of metal and comprises an angle bar including a base flange I0 and an upright flange or web ll integral with Said base flange. The upper portion of each of atomic the upright flanges or webs l i is cut inwardly from each end to provide the inclined edges l2 (Figure 3) and the material above the cuts is bent outwardly to provide a pair of anchoring blades or wings l3.

opposite side of the web flat as clearly illustrated in Figures and 6. I

The anchoring shoes are transversely shiftable or slidably mounted within the grooved base section with adjacent shoes reversed with respect to one another, so that the anchoring blades or wings l3 project outwardly leaving the flat sides of the upright webs or flanges of the anchoring shoes facing inwardly. As clearly illustrated in Figure 2 the anchoring shoes are staggered with respect to one another so that the upright flanges spaces between the inner surfaces of the upright flanges II and the outer faces of the retaining flanges 9 of the base member.

The outermost anchoring shoe, in each of the base sections of the device, has connected therewith a closure means for closing the outer end of the void forming core unit and the outer end of the void resulting from the removal of the core unit after the pouring of concrete which forms the upper or crown section of the road. The closure means for the core unit, is similar to that illustrated and described in my copending application for patent for a Road joint mechanism with void forming unit filed November 17, 1933, U. S. Serial No. 698,437, and comprises a primary closure plate It (Figure 2) having'a flange portion which is rigidly secured on the flat side of the upright flange ll of the'outermost anchor shoe. The main closure plate l4 has slidable in terfltting or telescoping engagement with a plate receiving pocket or socket IS. The guide pocket I5 forms an auxiliary closure means having a portion thereof bent to project into the outer end of the void forming core unit toact as a stop flange i6 as illustrated in dotted lines in Figure 2.

The void forming core unit comprises a pair of sheet metal plates I! which are deflected inwardly near their upper margins to provide seats or shoulders l8 permitting the upper margins of the core plates to be positioned closely together as clearly illustrated in Figures 5 and 6 to afford a closure cap support. The lower margins of the core plates ll rest upon the top surfaces of the top plates of the base member between the retaining flanges 9 and the inner flat faces of the upright flanges H of the anchor shoes as clearly illustrated in Figures 5 and 6. By positioning the retaining flanges 9 to the inside of the core plates I! said plates are properly held in spaced relation with respect to one another for the purpose of providing the required air gap or space beflected inwardly and has the margin thereof temporarily deflected into the full line position illustrated in Figure '7 parallel to the back of the channel I9. The margin of the lower flange of the socket affords a supporting flange2i which The anchoring blades i3 project outwardly from one side of the web ll leaving the after removal of the core unit is adapted to be deflected into the dotted line position of'Figure '7 to serve as a support and a guide flange for stantially parallel to the back of the socket i9 and parallel to the normal position of the guide flange 2| with which it coacts to form a mouth for a purpose hereinafter more fully described. As clearly illustrated in'Figure 4 the top flange 22 in the trough portion adjacent the mouth'flange or lip 23 is provided with a row of spaced openings or apertures 24.

For the purpose of holding the chambered sockets temporarily in position on opposite sides of the upper portion. of the core unit the deflected portions of the lower flanges of the sockets are seated against the shoulders it of the core plates with the lip or mouth flanges 2| seating against the outer surfaces of the upper margins of said core plates as clearly illustrated in Figures 5 and 6. A removable channel-shaped form or top cap 25 is engaged over the top margins of side of the mouth flanges or lips 23 of the sockets and therefore act as resilient holding means for temporarily clamping the spring-like entrances or mouths of the sockets between the core plates and the removable capwith the chambered body portions of the sockets projecting outwardly in a convenient position to be imbedded in the concrete forming the sections of a road.

As illustrated in Figures 2 and 3 a pair of the road joint forming base units each of a length of substantially the width of one-half of the road are positioned upon the road subgrade I in alignment with one another to span the entire width of the road. The void forming units supported on the base sections are also provided in lengths edual to the width of one-half of the road so that the two complete units have the inner ends thereof either abutting one another or spaced a slight distance apart as indicated in dotted lines in the middle portion of Figures 2 and 3. For the purpose of closing the gap between the inner ends of the two joint forming units a gap spanning or The flanges of the removable form or top cap 25 are disposed tothe outclosing unit is engaged over the abutting ends of of which comprises a side plate 26 the lower end of which is deflected outwardly and curved downwardly to provide a closure foot or shoe 21 which projects outwardly and downwardly to have the outer end thereof rest on the subgrade as clearly illustrated in Figure 6. The closure shoe 2'! serves to close the gap between the guide channels of the aligned base sections while the vertical plate 26 spans the gap between the aligned core units. upper end thereof is deflected outwardly to pro- A section of the closure plate 26 near the vide a channel section 28 shaped to fit around the abutting ends of the sockets It). The upper margins of each of theclosure plates 26 project upwardly to seat against the outer side of the abutting ends of the top closure caps or forms 25. To hold the two closure plates 26 on opposite sides of the abutting ends of the rcad'forming units a retaining hood or cap of substantially U-shaped cross section and designated by the reference numeral 29 is engaged over the abutting ends of the closure caps 25 to close the gap therebetween. I

With the completed road joint forming unit in position upon the road subgrade to span the entire width of the road and with the gap forming closure units engaged over the abutting inner ends of the aligned base, sections and core units of the device, concrete is poured upon the subgrade on opposite sides of the'joint forming mechanism to imbed the various members thereof. The end closure mechanisms i4 and I5 at the outer ends of the form prevent concrete from entering into the chambered core units while the intermediate closure mechanisms spanning the inner abutting ends of the forms prevent concrete from entering through the middle portion of the joint forming mechanism. After the con- .crete has been allowed to set a desired amount,

the outer gap spanning closure cap or hood 29 is first removed from the upper margins of the side closure plates 26. With the removal of the hood 23 the upper closure caps or forms 25 of the twojoint forming units are removed from the upper portions of the concrete leaving the side closure plates 25 and the sockets l3'imbedded in moval of the core closure cap 25 and the core plates I! that the interfltting or telescoping end closure plates or members I4 and I5 remain in position with the flanges ii of the closure members l5 projecting into the outer ends of the expansion void 30.

After the removal of the respective caps and the core unit members the socket members are left partially imbedded in the concrete road sections 5 with the open mouthed portions of the socket units projecting into the air expansion void 30 as clearly illustrated in Figure 7. The guide and supporting flanges 2| are now bent from the full line positions of Figure 7 into the 'dotted line positions whereby opening of the mouths of the socket units for the reception of the channel-shaped side margins 3| of an arched closure cap or bridge member 32. The channelshaped margins 3| of the bridge unit are provided with rowsof openings or apertures 33. The bridge unit may be provided in a length equal to the entire width of the road or if desired two lengths aligned with one another each length being of half of the'width of the road may be used in which case the inner abutting ends of the bridge members may be covered byv a spanning strap .or crack closing arch member. The bridge member 32 is engaged downwardly in the upper open end of the expansion void 33 with the apertured channel margins 3| thereof projected against the inwardly deflected guide flanges 2| of the side sockets which serve as-a guide means for guiding the apertured channeled margins 3i of the bridge member into the chambers provided within the supporting sockets 13. It will thus be noted that the bridge members 32 span the space between the supporting sockets l9 and divide the expansion space 30 into a lower expansion chamber and an upper space provided above the bridge unit and between the upper edges of the concrete sections 5. With the bridge unit supported in position by means of the chambered sockets a. filling of hot plastic material such as asphalt or the like is poured into the top space to form a compressible and expansible flller block 34 The hot filling of plastic material 34 as it is poured into the upper cracks between the road sections is prevented from entering the lower expansion chamber due to the placing of the bridge members 32 so that the plastic material is guided into the supporting sockets l9 to fill the same as clearly illustrated in Figure 8 and to also fill in the openings and apertures 24 in the upper flanges of the socket members and the openings 33 provided in the channel-shaped flanges of the bridge members 32. The plastic material thus deposited in the upper portion of the road joint acts as a locking means between the supporting pockets and the bridge members. It will thus be noted that the plastic closure for the upper -portion of the air expansion void of the road joint together with the socket members I9 and the bridge units 32 forms an expansible and contractible closure between the upper portions of the road sections 5 so that the expansible closure joint may be adjusted with the expansion and contraction of the road sections due to temperature changes.

Figure 9 illustrates a modified form of expansion joint bridge closure unit for use in combination with the chambered supporting sockets 13. The modified form of bridge unit comprises two deflected strips 35 constructed of a plastic material having a wire or metallic reinforcing fabric 36 imbedded therein. Two reinforced strips of fabric material 35 are used and are positioned in inclined relation with respect to one another to converge at their upper margins to form an arched bridge unit with the ridge of the arch closed by means of an expansible or spring-like arched metal closure cap or hood 31. The outer margins of the'spring-like cap or closure hood 3! may be slightly deflected or toothed to engage into the plastic material forming the side strips or plates 35 of the bridge unit. In this form of construction after the bridge unit is engaged with the side margins thereof projecting into the supporting sockets IS a plastic material such as asphalt in a hot state is poured into the upper opening and passes into the supporting sockets l9 and through the holes 24 of the upper flanges of the socket members. The hot asphalt or plastic material which is poured into the upper crack and into the sockets combines with the plastic material of which the bridge strips 35 are formed to lock therewith and form a continuous expansible and contractible closure unit for closing the space between adjacent road sections 5 and leaving an air expansion void 30 between the road sections beneath the bridge unit.

The present invention embodies the provision of an improved air expansion joint forming mechanism for roads including base sections and removable core units with the core units having adjustable closure means for the ends of the expansion space connected therewith. The joint forming mechanism furthermore includes theanemic means between the bridge members and the bridge supporting sockets to form an expansible and contractible closure unit for the upper portion of the joint.

It will, .of course, be understood that many details of construction may be varied through awide range without departing from the principles of this invention and it is therefore not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I .claim as my invention:

1. A load transmission air expansion joint former comprising a base section, anchor means transversely reciprocal in said base section, a core unit removably supported on the base section, flange members formed on the base section projecting upwardly into the core unit to hold the walls' thereof properly spaced, chambered socket members temporarily carried by the core unit, and cap means removably engaged on the core unit for releasably holding the socket members on the sides of the core unit.

2. A load transmission air expansion joint former comprising a base section having spaced flanges integrally formed thereon and projecting upwardly therefrom, anchor means shiftably engaged in the base section between the base flanges,

core plates removably engaged between the base flanges and the back portion of the anchor means to hold the core plates properly spaced with respect to one another, a closure cap remo ably engaged on the upper margins of the core plates, and chambered sockets removably clamped on the core plates by means of said removable cap.

3. A. load transmission air expansion joint former for embedding between concrete sections and comprising a load transmission base unit, chambered sockets positioned thereabove, means supported on the base unit for temporarily supporting the chambered sockets until the same are partially imbedded in the concrete sections and are held in position by the concrete sections permitting the supporting means to be removed to leave an air expansion void between the concrete sections and between the base unit and the chambered sockets, an expansible and contractible bridge unit bridging the air expansion void and projecting into the chambered sockets, and an expansible and contractible filling for locking the chambered sockets and the bridge unit together and also filling the space between the concrete sections above the bridge unit.

4. A concrete construction joint former comprising a base unit, a core unit removably supported thereon, and chambered socket members releasably carried by the core unit and releasable thereby when the core unit is removed from a concrete construction.

5. An air expansion joint formed between adjacent concrete road slabs and comprising a load transmission base closing the bottom of a void formed between said slabs, socket members partially imbedded in the concrete on opposite sides removable from the concrete to leave a void therein, chambered sockets carried by the core unit and having open mouthed portions seated against the sides of the core unit, and retaining means releasably engaged over the core unit and said mouth portions for holding the chambered sockets temporarily associated with the core unit.

7. A concrete road joint former comprising in combination a core. unit, releasable chambered members carried by the coreunit and having open mouthed portions, and cap means removably engaged on the core unit for releasably hold-' ing the chambered members in place.'

8. A concrete road joint formed in concrete and comprising in combination a core unit temporarily embedded in the concrete and then removed from the concrete to leave a void therein, releasable chambered members carried by the core unit and retainable by the concrete when the core unit is removed and having open mouthed portions projecting into the void adapted to receive a bridge means and a filling for closing the top of the joint.

9. A concrete road joint formed between concrete slabs having a void therebetween, said joint comprising in combination a means for closing the bottom of the void, chambered members carried by the concrete slabs and including apertured open mouthed portions projecting into the void, bridge means spanning the void and having apertured portions projecting into open mouthed portions of the chambered members, and an expansible and contractible filling supported on the bridge means to close the upper portion of the void and fill the chambered members and the apertures in the apertured portions of the chambered members and the bridge means to lock the chambered members, the bridge means and the filling together. a

, 10. A road joint filler bridge. unit for use in connecting two spacedconcrete sections, said unit comprising in combination a pair of chambered socket members partially imbedded in the oppo-' site sections of concrete and including open mouthed portions projecting into the space between the concrete sections, of an adjustable bridge unit, between the concrete sections and projecting into the open mouthed portions of the chambered socket members, and a. lock of bituminous material supported on the bridge unit "and filling the chambered'sooket members and interlocking the bridge unitwith said chambered socket members.

11. A road joint filler bridge unit for use in connecting two spaced concrete sections, said unit comprising in combination oppositely positioned chambered socket members partially imbedded in the spaced ,concrete sections and including open mouthed portions projecting into the space between the sections, an arched bridge member spanning the space between the sections and projecting into the open mouthed portions of the chambered socket members, and an asphaltlock supported on the bridge member and filling the chambered socket members and embedding the ends of said bridge member.

12. A road joint filler bridge unit connecting two spaced concrete road sections and comprising in combination a pair of chambered socket members partially imbedded in the spaced con-. crete road sections, lower supporting flanges integrally formed on the chambered socket members and projecting into the space between the road sections, apertured upper flanges integrally formed on the chambered socket members and projecting into the space between the road sections, an adjustable bridge means having apertured margins which project into the chambered socket members between the lower supporting flanges and the apertured upper flanges, and a filling or contractible and expansible material filling the space between the sections above the bridge means and filling the apertures in the upperflange members and in the apertured margins of the bridge means to lock the bridge means and the apertured chambered members together.

13. A road joint flllerbridge unit connecting two spaced concrete road sections and comprising in combination an adjustable bridge means for supporting a filler between th'eroad sections, and a plurality of chambered supporting means for the bridge means partially imbedded in the road sections and each comprising a channeled body section, a spring-like lower supporting flange and an apertured upper flange spaced therefrom, said lower flange and upper flange forming an entrance mouth to the channeled body section for the reception of the bridge means.

14. A road joint flller bridge unit connecting two spaced concrete road sections and comprising in combination a pair of oppositely positioned chambered sockets partially imbedded in the concrete road sections, open mouthed portions formed on the chambered sockets and projecting into the space between the road sections, and an adjustable bridge member constructed ofreinforced bituminous material spanning the space between the road sections and projecting into the open mouthed portions of the chambered sockets.

15. A road joint flller bridge unit connecting two spaced concrete road sections and comprising in combination a pair of chambered sockets positioned opposite one another and partially imbedded in the spaced concrete road sections,

mouth portions formed on the sockets and projecting into the space between the road sections, and an adjustable bridge means spanning the space between the sections and projecting into the mouth portions of the sockets, said bridge means comprising an arched strip of reinforced bituminous material and'a metal cap engaged over the bight portion 01' the arched strip" and engaged 2 Elle reinforced portion or the bituminous mari a 16. A road joint flller bridge unit comprising in combination a pair oi oppositely positioned channel strips, lower supporting flanges integrally formed thereon and deflected upwardly towards one another, apertured upper flanges formed on the channel strips and projecting inwardly towards one another and positioned above the lower supporting flanges to coact therewith to form entrance mouths to the channel strips, an arched bridge member between the channel strips, apertured marginal portions formed on the arched bridge member and projecting into the channel ,strips, and an expansible and contractible looking means filling the channel strips and the apertures in the apertured marginal portions or the bridge member and the apertures in the upper flanges of the channel strips to lock the channel strips and the bridge member together.

17. In a road joint forming mechanism the combination with a pair of base units aligned with one another, a pair or core units removably sup ported on the base units, crack spanning members positioned to span the space between the adjacent ends of the aligned base members and core units, and means engaged over and spanning the space between the adjacent ends of the core units and engaging the crack spanning members to hold the same in position.

18. In a road joint forming mechanism the combination with a plurality of aligned base members, load transmission anchoring units engaged in the base members, a plurality or void forming core units aligned with one another and supported on the base members, and closure means for closing the spaces between the adjacent ends of the base members and the core units.

19. In a road joint forming mechanism the combination with a plurality oi! aligned base members, of load transmission anchoring units engaged in the base members, a plurality oi! void forming core units aligned with one another and supported on the base members, closure means for closing the spaces between the adjacent ends of the base members and the core units, and adjustable closure means for closing the outer ends of the core units.

20. A concrete construction joint filler bridge unit for connecting spaced concrete sections and comprising in combination chambered means imbedded in the spaced concrete sections, bridge means between the concrete sections supported by the chambered means, and means filling the chambered means and embedding the ends of the bridge means for locking the bridge means with said chambered means.

ROBERT R. ROBERTSON.

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