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Oct. 25, 1.938. E. MUNDT 2,134,641 M-ACI-IINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS Original Filed July 20, 1934 4 sheets-sheet 1 Oct. 25, 19385.. E, MUNDT 2,134,641 MACHINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS Original Filed July 20, 1934 '7 I ‘ T313, 5. 4 Sheets-Sheet 2 25, 1938. E. MUNDT 2,134,641 MACHINE FOR EMPLACING EXPANSION JOINTS AND DOWEL BARS Original Filed July 20, 1934 4 Sheets-Sheet 3 Uct.25,1938. ' ' E MUNDT ' 2,33%“ MACHINE FOR EMPLAGING EXPANSION JOINTS AND DOWEL BARS Original Filed July 20‘, 1934 , I J Subgrzza’e 4 Sheets-Sheet 4 Patented Oct. 25, 1938 2,134,641 UNITED STATES‘ PATENT’ oFFicE 2,134,641 ’ MACHINE FOR EIMPLACING EXPANSION JOINTS AND‘ DOWEL BARS Edward Mundt, Streator, Ill., assignor to Robb & Robb, Cleveland, Ohio Application July 20, 1934, Serial No. ‘736,246 Renewed August 26,1938 24 Claims. in The present invention has relation to construc tion of concrete roads or pavement. As is well known, it is customary in the building of concrete roads, to accommodate for the expansion and accurately spaced in proper parallel lines re specting said pavement structure. By means forming a part of the invention, when the as. sembly of the expansion member and dowel bars ‘.contraction of the concrete under varying tem perature conditions by the installation, at spaced intervals in the length of the concrete pavement, ‘of expansion joints’. Moreover, in order to main has been made and the machine moved upon the road’ forms or rails aforesaid to the proper place at which the joint and bars are to be in stalled, these parts may be lowered into their tain'the sections'of the pavement in proper re lQ; lation at opposite sides’ of,v the expansion joint, de?nitely predetermined position relatively to the subgrade. The concrete may thereafter be em it is common to avail of a seriesof dowel bars by‘ which to interlock or connect the sections placed atropposite sides of the joint member to together. The ‘expansion joints are customarily positions embedded in the concrete. Thereafter, located transversely of the road subgrade, and the dowelbars are disposed longitudinally there of, or in the direction of the traffic flow. The primary object of my invention is to pro vide a machine for facilitating the installation ‘of the expansion joint and dowel bar members by'sp-ecial provisions forming a part of the in vention, the instnlmentalities by which the ma above referred to, It is an essential desideratum, to the subgrade, may be released and the ma for the proper engineering of concrete roads or pavements,‘ that the expansion joint member which is usually preemolded of bituminous ma terial shall belocated accurately at right angles 2,5‘, to ‘the subgrade and center line of the pave ment., For the same reason it is required that the dowel'bars be installed accurately parallel with such-subgrade and center line of the pave ment. i (Cl. 94-—51) 3v.' ' r The machine of my invention provides mech 10 hold the same with the dowel bars in proper 15 chine itself is accurately located over the sub grade, and the instrumentalities by which the joint member and the dowel bars are supported in accurately predetermined positions relatively chine .moved progressively to a place where, in the elevated position of its frame parts, a fresh expansion member and associated set of dowel bars may be disposed thereon and the opera tion carried on‘ progressively in the manner above 25 set forth. By reason of the features of my machine above outlined, the emplacement of the expansion joints and/or dowel bars associated therewith, in respect to‘ the pavement,_is de?nitely coordi nated with the sections of the pavement with expansion joint members and dowel bars or mem-‘ -which these parts are to cooperate so that each bers in the manner above referred to, may be ' joint will be correctly placed and will function, properly from an engineering standpoint. Fur ensured. anism by which the accurate placement of the , In the carrying out of my inventionvI con thermore, the expansion joint and dowel bar 35 template the employment of a portable machine mounted on wheels adapted to travel along the side forms located at'the‘ opposite sides of the subgrade preliminarily to the depositing of the installations are adapted to be performed quickly - 40 concrete ‘ between said forms for the pavement construction. My machine is equipped with in strumentalities whereby the main frame member thereof may be adjusted to assume an elevated position, and- while so elevated will permit of ' quick and easy ‘disposing of the expansion joint ' member and the dowel bars to be‘ associated therewith‘in a complete assembly upon the ma chine ready for, ‘installation. Suitable devices are employed to ensure that the assembly. of 50 the expansion. joint and dowel members is ac so that the paving operation is not likely to be delayed in any way during the progressive de positing of the concrete upon the road, all of which is of material importance from a practie 40 cal viewpoint in the construction of roads of the type referred to. As‘ compared with the common method of ex pansion joint and dowel bar installation, requir ing the employment of iron stakes driven into 45 the subgrade, and the utilization of chairs or special supports for holding the dowel bars in proper positions, my’ machine method of han dling these installations affords a considerable saving of material such as the stakes or pins 50 curately arranged so that when these members and chairs, as vwell as affording a material sav are lowered'relatively to the subgra'de they will ing in labor that is incident to the actual posi tioning of the said stakes and chairs in accurate locations for the purpose in view. A complete understanding of the invention and 55 be properly positioned with the expansion joint at a right angle, to the line of the pavement to 55 be constructed andwith the various dowel bars 2 2,134,641 the merits thereof under practical conditions of use in the building of concrete pavement or roads will be had by reference to the following de tailed description, and to the accompanying drawings, in which Figure 1 is a view in front elevation of a ma chine or apparatus embodying the essential fea tures of my invention. Figrue 2 is a top plan view of the same. 10 Figure 3 is a fragmentary sectional view of a portion of a concrete road illustrating the ex pansion joint member and a dowel bar as when pivotally attached at 8 to said ends of the mem ber 3. A boss or sleeve-like member 9 is rigid ly secured to each end of the frame member 3 and provides an extended bearing thereon for the pivot 8, as well as forming a spacing bearing part between the sides of the carrier members 4. Mounted in suitable bearings I!) attached in any substantial manner to the upper portions of the ends of each frame member is a horizontal actu ating shaft H equipped near its ends and adja 10 cent to the bearings l0 with worm gears l2 suit ably keyed to the shaft and engaging with the installed by the apparatus. teeth of the worm sectors 5 which virtually con Figure 4 is an enlarged plan view of one of the end supports for the main frame and a portion of the main frame extending therefrom show ing more clearly certain details. Figure 5 is a view in side elevation of the end stitute worm gears. support, dotted lines illustrating the elevated position of the frame affected by the raising ac tion of the carrier members for the wheels. Figure 6 is a horizontal sectional view through one of the end supports. Figure '7 is a fragmentary sectional view taken 25 about on the line 1-1 of Figure 4. Figure 8 is a fragmentary sectional view taken about on the line 8—8 of Figure 7, looking in the direction of the arrows. Figure 9 is a fragmentary plan view of a por 30 tion of the main frame, illustrating more fully the disposition of the arms or guides for posi tioning the dowel bars and the actuating means for the supporting members provided to hold the dowel bars in proper position upon the machine. 35 Figure 10 is a fragmentary sectional view taken about on the line |0—ID of Figure 9, looking in the direction of the‘ arrows, and bringing out the detailed construction of the same general parts. Figure 11 is a. fragmentary View in elevation 40 showing more clearly the mounting of the sup porting members for the dowel bars and actuat ing means therefor. Figure 12 is a fragmentary view showing in elevation the rail gripping or anchoring member 45 and the mounting means for the levers for oper ating the dowel bar supporting members. Figure 13 is a detail view in section taken about on the line l3——l3 of Figure 10. Figure 14 is a detail View of the ratchet mech 50 anism for operating the carrier members on the end supports. Speci?cally describing the machine of this in vention, the same may be said to comprise a main frame A fabricated by attachment together of 55 an angle bar I and a channel 2 to provide a long frame structure adapted to span the subgrade on which a concrete road is to be laid. The frame A is mounted at its opposite ends upon end sup ports generally denoted B, these end supports being clearly shown in Figures 4 to 6 inclusive. The end supports comprise a frame member 3 disposed transversely of the main frame A and rigidly attached thereto by any suitable fasten ing means. Included as parts of the end supports 65 B are carrier members 4 which comprise spaced plates or side parts, seen best in Figure 6. One of the plates or side parts of each carrier mem ber It is extended at one end to provide a toothed sector 5, the opposite end of said carrier mem 70 ber having mounted thereon a wheel 6 on the axis member 7. The wheels 6 of the carrier members 4 are disposed between the spaced side parts thereof, and said carrier members also re ceive between the said side‘parts the opposite 75 ends of the transverse frame member 3, being The carrier members 4 are designed for pivotal 15 movement to shift the same from the approxi mately horizontal positions of Figure 5 to the approximately vertical positions illustrated in dotted lines in the same ?gure, the movement of said carrier members being effected by rotation 20 of the shaft l I by any suitable means. The means illustrated is preferably of the manually actu ated type and consists of a lever l3 for each shaft I I. The lower portion of said lever comprises 26 spaced sides I30. between which is disposed a spring pressed double-acting ratchet dog M. The ratchet dog l4 includes spaced ratchet members Ma capable of engaging a toothed ratchet wheel l5 keyed to the shaft H at the central portion 80 thereof and disposed between the side members i 3a of the lever l3. The upper portion of the ratchet dog M is provided with flats H5 at a slight angle to each other, and these flats are adapted to be engaged by the lateral arm I‘! of a 35 spring 18 attached to the inner face of one of the side members |3a of the lever l3. The spring pressure of the member I‘! is adapted to hold the ratchet dog M in either of its reversed operating positions as shown clearly by full and dotted 40 lines in Figure 14. I It is evident from the foregoing that by manu ally grasping the upper end of the lever IS the latter may be moved back and forth in a direction parallel with the main frame A and thus the shaft Il may be rotated in order to turn the screws or worms l2 and thus actuate the carrier members 4 to move the same from their approximately hori zontal positions to their vertical positions, and vice versa, the shifting of said members to their 50 vertical positions elevating the frame at the end thereof adjacent to which the particular lever I3 is located. The mechanism asshown in Figures 4 to 6 inclusive is provided in duplicate, 'one mechanism 55 for each end of the main frame A so that the frame A may be bodily elevated and lowered by manual operation of the levers l3 by workmen 10- ~ cated at opposite ends of said main frame and at opposite sides of the subgrade over which the 60 frame is supported. It is to be understood that the members 4 func~ tion both as elevating and lowering means for the main frame A, and they also function by reason of the provision of their wheels 6 as traveling sup ports, whereby the whole machine of the invention may be moved longitudinally of the side or road forms l9, which are clearly illustrated in Fig ures 1 and 2. Now it is an objective of the invention to pro— 70 vide means intermediate the frame of the ma chine and the road forms l9 whereby to anchor the machine ?rmly positioned against movement ' on the road forms when the machine has been adjusted to the position in which the expansion 3 2,184,641 member and dowel bars are properly and accu rately positioned over the road subgrade ready to be embedded in the concrete to be laid thereon. of the guide members 29. The dowel bar sup porting member is designated 32am ‘consists of a vertical shaft carried in bearings in suitable brackets 33 attached to the vertical'portions of For this purpose mechanismjshown best in Fig the guide members 29. The lower ends of the urese, 5 and 7 is employed. Such mechanism in cludes a simple device in the form’ of a road form shafts or dowel supporting members 32 are engaging member 23, the lower end‘ of which is formed with lateral supporting arms 34, and a hook-shaped‘as at 2! to extend around and en-z spring 35 encircles each member 32 and has one gage with the top ?ange of the road form l9. The end dead-ended on the guide member 29 adjacent thereto, the other end of the spring being attached 10 10 member. 2|! is vertically movable in a bracket 22 at the uppermost portion of I which is a_ horizontal to the shaft and normally tending to hold the cam 23-of spirally rising formation as seen best in Figure 5. . ' _ Fastened to, the upper end of the member 20 by _a nut or any suitable means!!! is a camming 20 lever 25, the lower surface of which rides in con tact’with the upper surface of the cam 23. The ‘lever, 25 may be manually grasped, and is rotat able upon' the member 20 while the lever is in contact with the upper surface of the cam 23, and‘ in this manner the hook portion 21 of themem ber 29 may be raised and lowered to positively en gage and become disengaged, respectively, from the top ?ange of the road form. An anchoring 25 device such as just described will be provided on the frame member 3 of each end support so that the machine may be locked'or anchored ?rmly to the road forms l9 at opposite sides of the sub . grade when the machine is ready for the emplace ment of the expansion member and dowel bar as sembly to be embedded in the concrete deposited on the subgrade. " receiving At its upper end each of the dowel bar support ing members or shafts ‘32 is equipped with an 15 actuating arm 36 having a down-bent extremity engaging one side of a link 3‘! forming a part of a trip device including a second link 38 piv oted to the link 31 and also pivoted to a clamp member 39 which is clamped about an operating 20 rod 40, the operating rod 40 sliding lengthwise of the main frame A in guides or bearing mem bers Ill laterally offsetting from said main frame. Now it is to be understood that each of the guide members 29 is equipped with a dowel bar sup 25 porting member 32 and the actuating parts there for which have just been described. Moreover, it will be seen‘from the drawings that I provide an operating rod 40 for, the seat of the dowel bar supporting members 32 located at the front, of 30 the frame’ A, and a second operating rod '40 for the dowel supporting memberslocated at the rear ' ‘The means for supporting the expansion mem ber, designated 26, upon the main frame A of the machine, comprises a arm 34 of each member 32 engaged beneath a - dowel bar received in the ‘seat 31. . or a clamping member which includes a relatively deep vertical plate 2'! and a relatively shallow, similar plate 28 spaced therefrom, the two plates 21 and 28 being of the frame A. 'To operatethe rodsml I provide an actuating lever 42 at one‘yend'of each rod, see Figure 8, said lever being pivoted at 33 and 35 being adapted to be heldrin either its open or closed position, as shown in Figure '7, by means of a latch adapted to engage in the notches M 4.0 theupper end portion of the expansion member of an ordinary locking sector 45 of known type construction. By adjustment of thelever 42 in 26 as seen best 'in Figure 10 of the drawings. one direction, therefore, it will actuate its rod 49 adapted to snugly receive and slightly clamp The expansion members are out to proper length ‘to open the seats 30 by turning the dowel bar to conform with the width of the pavement‘to be supporting arms 49, and when the lever is locked laid upon the sub'grade previous to inserting the in such position the seats will remain open in 45 expansion members into the holding means there preparation for the reception of the dowel bars. 46 Or, if the leverr42 is operated in the opposite for comprising the parts 21 and 28, and further .more the said expansion members are formed direction to the closed position of Figure 7, the arms 34 will be turnedto. close the seats 33, in with holes therethrough at the properpoints ver tically thereof through which holes the dowel bars. which positions the arms 34 will extend beneath to be assembled with, the expansion member upon the dowel bars and carry the same, as well shown 50 the frame ‘A may pass. . in Figures 10 and 11. v I utilize dowel bar supporting means in my ma chine as means not only for carrying the dowel bars in proper assembled relation to the expan sion member, but I employ these dowel bars large ly as the supporting means for holding the expan sion member in position in the holding devices 27-48 previously described. . a Reference is now made to Figures 9 to 11 inclu 60 sive for a full understanding of the method of assembling and supporting the dowel bars upon the main frame A. Located at intervals in the length of the main frame A are a series of de pendingrguide members 29, the upper ends of 65 which are "laterally extended and attached to the . angle and channel plates land 2, respectively, that constitute thefabricated frame A. The low erends of the guide members 29 as seen in Fig ure 11 are formed with seats 30 to receive the 70 horizontally disposed dowel bars 3!, these seats being open at one side of the members29. Means for holding the dowel bars v3| in the seats '30 of Of course the levers 42 may be provided one for each rod 49 and located ' near one of the end supports of the machine as illustrated, or‘ these levers may be duplicated at the opposite end of the machine if so desired. 55 Operation of machine The foregoing'sets'forth the general construc tion and arrangement of the parts of my ma chine, and the operation thereof is compara 60 tively simple, as will now be set'forth. Since the machine is susceptible of travel along the road forms at opposite sides of the sub-grade, it may be disposed in a convenient position. out of the way of the paving operation, with the 65 main frame elevated by adjustment of the end supports as shown in dotted lines in Figure 5, this elevation of course being accomplished by actuation of the two levers I3 at oppcsite ends of the machine. With the main frame A elevated 70 as stated, the bituminous or other type of expan-' sion joint member 26 is placed in its holding means 2T~28 previously described, the expan the guidemembers 29 are provided, these means comprising a dowel bar supporting member’ and . sion member of course being- cut of a length cor 75 actuating means therefor, one provided‘ for each responding exactly with the cross section of the 75 4 2,134,641 pavement to be laid. Thereupon- the dowel bars 3| will be inserted through the holes provided in the expansion member 26 and positioned in the seats of the guide members 29 in the manner shown in Figures 10 and 11 of the drawings, after which the levers 42 will be actuated to move the operating rods 43 and closing of the seats 30 by the arms 34 of the dowel bar supporting mem bers 32. The expansion member and the various dowel bars properly disposed in relation. to each other as an assemblage are now supported on the main frame A of the machine largely by means of the arms 34 of the members 32 and the machine is 15 now ready to be moved along the road rails to the positon at which'the expansion member and dowel bar assembly is to be emplaced above the subgrade ready to be embedded in the concrete. The machine is now caused to be moved to .the 20 proper position on the subgrade for the proper and accurate positioning of the expansion mem ber and the dowel bar assembly, and then by actuation of the levers l3 again the said assembly is lowered by the shifting of the carrier members 4 to their horizontal positions. To prevent any improper movements of the machine after it is lowered in the manner stated, the machine is an chored to the road rails or forms by means of the lever 25, cam 23, and hook 2! devices previ 30 ously described. The concrete is then placed in position against the exposed side of the expansion member to hold it ?rmly in place, and when the concrete has been disposed on both sides thereof to the eleva tion of the ?nished pavement, the expansion member with the dowel bars will be properly em bedded in the exact and accurate positions re quired for these parts in reference to be pave ment. The machine is now ready to be moved to 40 another convenient position on the road forms by the application thereto of another fresh as sembly of expansion member and dowel bar parts. In order to do this the dowel bars 3! are released by the actuation of the levers 42 which move the 45 rods 40 and carry the clamping members 39 lengthwise of the main frame A, the arms 36 traveling in the direction of withdrawing move ment of the links 31 and thus permitting the dowel bar supporting members 34 to open the 50 seats 30. The anchorage means comprising the road form engaging hooks 2! may now be released and after this is done the levers I 3 will be oper ated to elevate the frame A and cause the expan sion member and dowel bar holding means to be 55 elevated ready to receive the fresh assembly of such parts for the next emplacement oper ation. ‘ It may be noted that the main frame and end supporting means of my machine consti 60 tute a traveling support adapted to travel on road rails or the like over a road subgrade. Moreover, it is to be understood that I do not wish to be limited to the use of my machine in conjunction with any particular type of expan 65 sion joint member because the holding means may be adapted to different constructions or types of expansion joints, of which there are a number of types in use today. Nor do I wish 70 it to be limited to the particular proportions of the parts as illustrated in the drawings, because these may be varied, dependent upon the particular type of expansion joint being handled and other considerations as for instance the 75 disposition of dowel bars and the required ar rangement of such dowel bars to the joint mem ber. While I have described and illustrated my ma chine as it is used in conjunction with installa tion of expansion joints of concrete and like pavements particularly, it is notable that the principles of construction employed by me are equally useful when my machine is adopted for the-purpose of’ handling and installing contrac tion joints. Contraction joints are very similar to expansion joints, and dowel bars are likewise used therewith in many instances. My joint holding devices may be constructed to hold and install contraction joints just as they are now illustrated as suitable for the installation of expansion joints. I therefore desire that my speci?cation and claims be read in the light of the utility of my machine for joint means gen erally whether of the expansion or contraction type. 20 Having thus described my invention, What I claim as new and desire to secure by Letters Pat ent of the United States, is— I. In a machine of the class described, in com bination, a main frame adapted to travel above a road subgrade relative to which expansion joint members and/or dowel bars are to be po sitioned, end frames for the main frame trans verse thereto, raising and lowering devices on the end frames for elevating and lowering the 30 main frame, and comprising wheels for facili tating the travel of the machine over the sub grade, anchorage devices carried by the end frames for connecting the machine positively to road forms upon which it may be supported, manual means for actuating said anchorage de vices to engage and release the same from the road forms, holding means on the main frame to be raised and lowered therewith cooperative with an expansion joint member, and dowel bar supporting means carried by said main frame, including dowel bar engaging and releas ing devices, the last mentioned devices being movable to hold the dowel bars in proper posi tion for emplacement with the expansion mem ber and releasing said dowel bars after such em 45 placement. 2. In a machine of the class described, in com bination, a main frame, supporting means there~ for enabling movement of said frame over a road subgrade, expansion joint holding members 50 mounted on said main frame, devices for sup porting dowel bars on said main frame, mecha nism whereby the said holding means and dowel bar supporting means may be raised and low ered, said dowel bar supporting means including devices for supporting engagement with the dowel bars and movable to release the latter. 3. In a machine of the class described, in combination, a main frame, supporting means therefor enabling movement of said frame over a road subgrade, expansion joint holding mem bers mounted on said main frame, devices for supporting dowel bars on said main frame, mech anism whereby the said holding means and dowel bar supporting means may be raised and lowered, said dowel bar supporting means in cluding devices for supporting engagement with the dowel bars and movable to release the latter, and operating devicesfor causing engagement 70 and release action of the devices for engaging and releasing the dowel bars. 4. In a machine of the class described, in combination, a main frame, expansion joint member holding means mounted on said frame, 715 g, 2,134,641 guide members carried‘by the mainframe coop bers. to, hold dowel bars seated thereon in ?xed and predetermined relation to- an expansion joint member engaged by the holding means therefor, ried by the holding means ‘therefor, dowel bar said engaging devices, comprising vertical shaft engagingand releasing devices cooperative. to’ parts rotatable onthe guide members, and mov able operating rods atvopposite sides of the ex , hold dowel- bars engaged with the ‘guide mem ‘bers aforesaid,» andoperating means for said pansion joint member holding means, each of erative to support ‘dowel bars in proper relation thereto and to an, expansion .joint member car engaging and, release devices. said‘ operating rods being connected with a'series 5. In a machine of the class described, in of the said shafts for actuating the same to con combination, a mainframe, expansion joint . trol adjustment thereof for engagement with 10 member holding means mounted on saidframe, dowel bars or for ‘releasing the latter from the guide members carried, by the main frame co operative to support dowel bars in proper rela-, 10. In combination, a main frame adapted to tion thereto and to an expansion joint member span a road subgrade, traveling means enabling 1 5 carried‘ by the holding means therefor, dowel the movement of said frame over the road sub 15 guidingmembers. bar‘ engaging and releasing devices cooperative bers af0resaid,operating means for said engag ing and release devices, traveling supports for subgrade while disposed over the same, and in- ‘ to?vthe main frame and an expansion joint mem strumentalities whereby the main frame: may be jcaused‘to be elevated and lowered relatively to ber carried’ by said holdingmeans, dowel bar en gaging and releasing devices associated with said guide members, and means accessible from the the subgrade of the road over which it is dis , a . , frame adjacent to said expansion joint holding means for positioning of dowel bars relatively 20 20 the mainframeenabling its movement along a posed. w grade, holding means for, an expansion joint member disposed longitudinally of said main frame, a plurality of guide members on the 'main ‘ to hold dowel bars engaged with the guide mem 25 ' . end of the main frame for simultaneously oper _ 6. vIn‘a machine of the class described, in com ating the dowel bar-engaging and releasing bination, a frame adapted ‘to be moved over a devicesyun road subgrade on which concrete is to be laid, holding means on said frame ‘for holding an I ,m ' 25 V ' ll. In combination, a main frame adapted to on said frame for supporting in accurate‘ rela tion to the expansion joint member a series of span a road’ subgrade, traveling means enabling the movement of said» frame over the road sub 30 grade, holding means for an expansion joint member disposed longitudinally of said main dowel ‘ bars, including engaging and releasing frame, a plurality of guide members on the main expansion joint member, other supporting means devices for said bars, and mechanism whereby the frame and the said holding and supporting frame adjacent to said expansion joint holding means for positioning of dowel bars relatively to 35 parts may be elevated and lowered. the main frame and an expansion joint member _ '_ '7. In la machine of ‘the class described,.in combination, a frame adapted to‘be disposed above a road subgrade‘ and having" means en ablingit to travel lengthwise of such subgrade, .49 ‘ holding means on the frame for an expansion carried by said holding means, dowel bar engag ing and releasing devices associated with said guide members, means accessible from the end of the main frame, for'simultaneously operating 40 the dowel bar engaging and releasing devices, joint member, supporting means for dowel bars carried by said frame and including vguide mem bers having seats for the dowel bars, and engag . ing members forholding the dowel bars in said seats, together with means whereby the frame and its supported parts may be caused to 'move' upwardly and downwardly relatively to the road ‘isubgrade, and means for operating said dowel vbar engaging devices to cause same to be en' gaged and disengaged in reference to the dowel‘ and ‘means ‘whereby the‘ main frame may be raised- and lowered, and mechanism for actuating bars cooperating with the ‘seats of-the guide. , to raise and lower the latter, and expansion joint member holding meanson the main frame, said members. . , a . _, '8. A portable machine for emplacing expan sion'joint members and‘dowel bars in, concrete ‘ road construction," comprising a main frame, means forraising and lowering the main frame, expansion joint member holding means on the main frame, guide membersi'disposed at'inter 60 vals along the main frame at opposite sides of the expansion joint holding means, and dowel bar engaging devices cooperating with said guide -_ members to hold dowel bars seated thereon in ?xed and predetermined relation to an expan sion joint member engaged by the holding means therefor. ‘ i ' V 9. A portable machine for emplacing expan ‘ sion joint members and dowel bars in concrete road construction, comprising a main frame, 70 means for raising and lowering themain frame, expansion ‘joint member holding means on the theg‘last mentioned means. ~ ‘ _' 12. In amachine of the class described, in com 45 bination,>a main frame adapted to span, a road subgrade and to; be; moved thereover, carrier ‘ members at the end of said frame comprising wheels adapted to travel on the road forms, actu ating 'means for the carrier members for shift ing their positions relatively to the main frame actuating means comprising manually operable worm devices and the carrier members having 55 toothed sectors to cooperate with said worm de vices, whereby; the carrier, members may be shifted from approximately horizontal positions 'to approximately vertical positions to elevate the 60 said frame. 13. In a machine for installing expansion joints in pavement structures, in combination, a mobile structure adapted to span a road subgrade, means on said structure for supporting an expansion 65 joint in the relation to the subgrade Whichthe expansion joint assumesrin the ?nal pavement structure, and means for elevating and-lowering the expansion joint supporting means. 14. In a machine for installing expansion joints in pavement structures, in combination, main frame, guide members disposed at intervals alongthe main frame at opposite sides ‘of the ‘a frame adapted to span a road subgrade, wheeled expansion joint holding means, dowel bar en gaging devices cooperating with said guide mem same over the subgrade, means on said frame for supports for said frame enabling travel of the supporting an expansion joint in the relation to 75 6 2,134,641 the subgrade which the expansion joint assumes in the ?nal pavement structure, and means for bodily elevating and lowering said frame and ex pansion joint supporting means. 15. In a machine for installing expansion joints in pavement structures, in combination, a frame adapted to span a road subgrade, adjust able means on said. frame for supporting an ex pansion joint, and manipulatable instrumental 10 ities on said frame for adjusting said supporting means to a position enabling the expansion joint to be placed in the machine, and for moving the expansion joint while supported by the supporting means, into a predetermined relation to the sub grade corresponding accurately to the position which the expansion joint assumes in the ?nal concrete including a supporting member disposed on either side of said joint,‘ said members being arranged to be removably positioned below the top level of the concrete, and slidable means dis posed beneath each, of said supporting members for retaining said dowels in ?xed relationship during the pouring of the concrete. 20. Supporting fabrication for reinforcing steel in paving joints comprising parallel members op posing said joint each having a plurality of in 10 dependently mounted rod retaining elements ca pable of collective sliding movement for releas ing said rods simultaneouslyto effect removal of said supporting fabrication. 21. Supporting fabrication for tie rods and 15 dowels in concrete paving joints including rela pavement structure. tively parallel members arranged to be disposed 16. In a machine for installing expansion joints in pavement structures, in combination, a frame adapted to span a road subgrade, adjust below the level of the forms between which said concrete is placed, each member having rod re able means on ‘said frame for supporting an ex pansion joint, and manipulatable instrumental ities on said frame for adjusting said supporting means to a position enabling the expansion joint 25 to be placed in the machine, and for moving the - expansion joint while supported by the support ing means, into a predetermined relation to the subgrade corresponding accurately to the posi tion which the expansion joint assumes in the ?nal pavement structure, said instrumentalities including mechanism for elevating and lowering the frame relatively to the subgrade. 17. In a machine for installing expansion joints in pavement structures, in combination, a 35 frame adapted to span a road subgrade, adjust taining hooks mounted for independent and col 20 lective movement whereby to e?ect simultaneous release of said rods preparatory to removing said fabrication subsequent to the placing of said con crete. . 22. Apparatus for positioning tie rods, dowels 25 and other joint reinforcing in concrete paving in cluding members spaced apart and disposed operatively below the level of the forms receiving said concrete, independently and collectively mov able means for receiving and holding the ends of 30 said rods in predetermined spaced relationship relatively and with respect to the concrete, and able means on said frame for supporting an ex means for anchoring said apparatus against dis placement during the pouring of said concrete. 23. Apparatus for positioning and holding re 85 inforcing rods in making joints in concrete paving pansion joint, and manipulatable instrumental including parallel members having means for re ities on said frame for adjusting said supporting means to a position enabling the expansion joint 40 to be placed in the machine, and for moving the expansion joint while supported by the support ceiving the ends of said rods for holding the lat ter relatively parallel and on a horizontal plane at right angles to said members and means for 40 ing means, into a predetermined relation to the releasing said rods simultaneously for removing said apparatus subsequent to the pouring of said subgrade corresponding accurately to the position concrete. which the expansion joint assumes in the ?nal 24. Expansion joint installing apparatus, com prising a portable frame including parallel side 45 45 pavement structure, said instrumentalities includ ing mechanism for independently elevating and lowering the opposite ends of the frame relatively members, means on said frame for supporting an expansion joint from said side members and par to the subgrade. allel thereto, support bars carried by the side members of the portable frame, guides on the said support bars, movable latches carried by the 50 support bars and operating in said guides, the 18. Apparatus for positioning reinforcing bars 50 in concrete paving joints, including a pair of spaced members in ?xed relationship and dis posed below the top level of the paving, and slid support bars being provided with means to re able means adjacent each of said spaced mem— ceive end portions of dowel rods, and operating bers for retaining said bars in ?xed relationship during the pouring of the concrete. means for the said latches to cause them to re 19. Apparatus for positioning dowels in con crete expansion joints during the pouring of the tain the dowel rods in the support bar receiving 55 means when disposed therein. EDWARD MUNDT.