US3758032A

US3758032A - Rail fastening arrangements

Info

Publication number: US3758032A
Application number: US00195275A
Authority: US
Inventors: O Varga; R Huston
Original assignee: Resilient Grip Ltd
Current assignee: Resilient Grip Ltd
Priority date: 1971-11-03
Filing date: 1971-11-03
Publication date: 1973-09-11
Anticipated expiration: 1990-09-11

Abstract

The invention relates to a rail fastening arrangement for securing a flat bottom rail on a foundation having preformed holes therein. There is provided a baseplate on which the flat bottom of the rail is adapted to rest and means for securing the baseplate to the preformed holes in the foundation. A pair of rail clips is provided one on each side of the rail with bolt means passing through a bolt aperture in each clip and engaging in a preformed bolt hole in the baseplate. Each clip has symmetrically spaced about its bolt aperture at least one pair of projecting heel lugs and the baseplate has symmetrically spaced about its bolt hole a complementary number of recesses adapted to receive and locate the clip heel lugs. Each clip is engageable with the baseplate with its lugs received and locates in the baseplate recesses, in at least two alternative dispositions. Each clip has for each lug a respective rail foot abutting and clamping shoulder, one of which rail foot abutting and clamping shoulders faces inwardly towards the rail foot for each alternative disposition of engagement of the clip with the baseplate and for each clip, each respective rail foot abutting and clamping shoulder is differentially spaced from the centre of the bolt aperture of the clip.

Description

United States Patent 11 1 Varga et al.

[ Sept. 11, 1973 RAIL FASTENING ARRANGEMENTS [75] Inventors: Otto Herman Varga,

Bradford-on-Avon, England; Ralph Huston, Pfafftown, N.C.

Resilient Grip Limited, Bristol, England; by said Varga [22] Filed: Nov. 3, 1971 [21] Appl. No.: 195,275

[73] Assignee:

[52] U.S. C1. 238/338, 238/287 [51] Int. Cl E01b 9/46 [58] Field of Search 238/338, 287, 283, 238/310-4115, 349, 339-341 [56] V References Cited UNITED STATES PATENTS 1,635,816 7/1927 Brown 238/338 1,845,990 2 1932 Schwinn.... 238/341 3,653,591 4 1972 Varga 238 283 3,576,293 4 1971 Landis et al. 238 310 3,451,621 6/1969 Splinter 238/310 10/1936 Werner et al 238/304 Primary ExaminerGerald M. Forlenza Assistant Examiner-Richard A. Bertsch Att0rney-Luke A. Mattare et al.

[57] ABSTRACT The invention relates to a rail fastening arrangement for securing a flat bottom rail on a foundation having preformed holes therein.

There is provided a baseplate on which the flat bottom of the rail is adapted to rest and means for securing the baseplate to the preformed holes in the foundation. A pair of rail clips is provided one on each side of the rail with bolt means passing through a bolt aperture in each clip and engaging in a preformed bolt hole in the baseplatev Each clip has symmetrically spaced about its bolt aperture at least one pair of projecting heel lugs and the baseplate has symmetrically spaced about its bolt hole a complementary number of recesses adapted to receive and locate the clip heel lugs. Each clip is engageable with the baseplate with its lugs received and locates in the baseplate recesses, in at least two alternative dispositions. Each clip has for eachvlug a respective rail foot abutting and clamping shoulder, one of which rail foot abutting and. clamping shoulders faces inwardly towards the rail foot for each alternative disposition of engagement of the clip with the baseplate and for each clip, each respective rail foot abutting and clamping shoulder is differentially spaced from the centre of the bolt aperture of the clip.

11 Claims, 6 Drawing Figures RAIL FASTENING ARRANGEMENTS This invention relates to rail mountings or anchorage arrangements with especial reference to those for use with flat bottom rails.

The present invention has for its general object to provide a mounting for a flat bottom rail which permits lateral adjustment of the clamping means for the rail relative to the sleeper or other analogous foundation even when the anchorage bolts have to be entered in predrilled holes in the foundation. Put another way, assuming a sleeper with predrilled holes to have been located on the track bed, or assuming holes to have been drilled in a fixed foundation or in a sleeper, the invention has for its object to provide clamping means for the rail with bolts engageable with the preformed holes and which permit some degree of flexibility for the lateral position of the rail to set the gauge or to set the rail at a curve. After being located as desired, the rail is required to be firmly held by the clamping means of the anchorage.

The invention utilises a baseplate and clip arrangement which can be used in conjunction with rail fastening assemblies of various types, i.e. those which are spiked or bolted to sleepers or foundations, and also those which are secured to the rail foundation by means of expansion bolt anchorages.

Essentially this invention employs multi-position clips to secure the rail to the baseplate and the clips are of the type which form a location for the edge of the rail foot and are bolted down to the baseplate to exert a grip on the rail foot against creep and displacement.

This invention provides a rail fastening arrangement for securing a flat bottom rail on a foundation having preformed holes thedrein comprising in combination a. a baseplate on which the flat bottom of the rail is adapted to rest andmeans for securing the baseplate to the preformed holes in the foundation;

b. a pair of rail clips one on each side of the rail;

c. bolt means passing through a bolt aperture in each clip and engaging in a preformed bolt hole in the baseplate;

d. each clip having symmetrically spaced about its bolt aperture at least one pair of projecting heel lugs and the baseplate having symmetrically spaced about its bolt hole a complementary number of recesses adapted to receive and locate the clip heel lugs;

e. each clip being engageable with the baseplate with its lugs received and located in'the baseplate recesses, in at least two alternative dispositions;

f. and each clip having for each lug, a respective rail foot abutting and clamping shoulder, one of which rail foot abutting andclamping shoulders faces inwardly towards the rail foot for each alternative disposition of engagement of the clip with the baseplate;

g. and wherein for each clip, each respective rail foot abutting and clamping shoulder is differentially spaced from the centre of the bolt aperture of the clip.

The lateral position of the clips is secured by the heel lugs entering the recesses in the baseplate.

In its basic. form the rail fastening arrangement comprises a'flat steel baseplate providing for bolt or stud means to bolt down the rail clip oneach side of the rail and sets of recesses or perforations in the baseplate to accommodate two or more heel lugs per clip. The multiposition clips are so formed that for each heel lug there corresponds a rail foot abutting and clamping shoulder on the opposite side of the bolt aperture.

While the heel lugs are preferably arranged symmetrically around the rail clip bolt aperture, the rail locating edges corresponding to the various lugs are at varying distances from the clip bolt aperture centre, thus providing a multiplicity of positions for the rail foot in relation to the clip bolts which are in fixed relation to the baseplate.

It will be apparent that the positions of the clips on opposite sides of the rail must be changed around and appropriately dispositioned in such a manner that as the rail foot is moved further from; the clip bolt centre on the one side it can move closer to the clip bolt centre on the opposite side by a corresponding amount.

In this manner a number of discreet positions of the rail in relation to the baseplate centre line are provided for, the intervals and range of variation being controlled by the design of the clips.

In its simplest form the baseplate may be provided with two equi-distant recesses or perforations for clip lugs on each side of the clip bolt centres on each side of the rail. If the corresponding clips are provided with two lugs each therewill be two positions for each clip on each side of the raildiffering by a rotation of 180.

If the two clips are identical this arrangement will provide altogether two rail positions whereas if the clips are different so that the lug-to-locating-edge differences are greater on one than on the other, this arrangernent will provide a total of four rail positions achieved by interchanging the clips between the two sides of the rail in addition to rotating them 180 on each side.

As a further variation the clips may be made two sided and invertible in the sense that locating lugs extend both vertically upwards as well as vertically downwards, each clip will therefore be able to assume four positions on each side of the rail, two positions each way up, and if the two clips are different a total of eight rail positions is possible by interchanging clips between the two sides of the rail.

It will be understood that the clip positions on either side of the rail must be so designed and so chosen that each increase of distance between the clip bolt and the rail edge on one side can correspond to the exact corresponding reduction in the distance between rail edge and clip bolt onthe opposite side.

The number of rail lug receiving recesses in the baseplate can be increased to four disposed symmetrically around the clip bolt. With two lugs the multi-position clip will be in strip form whereas if it has four lugs the clip will be cruciform providing alternative positions for each rotation. If in addition the clips are two sided providing positions each way up with locating lugs extending both upwards and downwards, each clip will in fact offer eight distinct f xing positions for the rail. With two identical clips on each side of the rail, a total of eight positions for the rail are provided whereas if the clips are made different and suitably graded a total of sixteen rail positions for the rail can be provided by adding to the eight clip positions the possibility of interchanging the clips between the two sides.

The most economical arrangement most likely to meet general requirements istwo strip form clips each with positions both ways upand with two lugs extending upwards and downwards giving a total of four positions for each clip. Two graded clips used together 3 would thus provide eight rail positions. In a practical case the intervals between the rail positions could be one-eighth inch and thus the total range of adjustment with this arrangement would be seven-eights inch for each rail.

The clip construction may be of cast or forged steel or they may be of malleable or other suitable cast iron material. In a preferred detail design the clip will have a hole for the clip bolt to pass through, and this hole will be placed centrally and symmetrically in relation to the locating lugs. Where locating lugs extend in both directions the lugs have to be placed at sufficient distance from the bolt hole to accommodate a box spanner around the bolt head or nut which may be used to fix down the clip to the baseplate.

The bolt means for clamping the clip to the baseplate can be of various types. It can consist of an upstanding bolt with head suitably accommodated underneath the baseplate, or it can be in form of a stud welded or press fitted to the baseplate. Alternatively, the baseplate maybe tapped to receive the fixing bolt screwed in from the top through the rail clip. As the baseplate is likely to be relatively thin, however, athreaded boss or ferrule may conveniently be fitted to the baseplate by welding or press fit. I r

The present arrangement is likely to be useful and beneficial in the construction of track for subway and urban railways in which tight curves and rail wear both create requirements for gauge adjustment. The possible use of a'plain perforated baseplate'offers great economic advantages over ridged, ribbed or otherprofiled types of baseplate and the system of track adjustment specified isrobust and economical both in installation and service.

Two embodiments of the inventionwill be described by way of example with reference to the accompanying drawings in which FIG. I is a plan view of a rail fastening arrangement according to a first embodiment of theinvention, and

FIG. 2 is a cross sectional view taken on the lines II II of FIG. 1;

FIG. 3 is a cross sectional view taken on the lines III III of FIGQI;

FIG. 4 is a plan view of a second embodiment of the rail fastening arrangement according to the invention;

FIG. 5 is a cross sectional view taken on the lines V V of FIG. 4; 4

FIG. 6 is a further cross sectional view taken on the lines VI VI of no. 4.

Similar reference numbers will be employed for like or analogous components and parts in the descriptions of the two embodiments.

Referring first to FIGS. 1 to 3 the rail fastening arrangement here shown comprises a baseplate l resting on a resilient rail pad 2 which in turn rests on a foundation having therein two preformed holes one of which is shown at 21 in FIG. 3.

The baseplate l is secured to the foundation by bolt means generally designated 22 and 23 in FIG. 1 engaging in the preformed holes 21 of the foundation 20.

In this embodiment the bolt means 22 and 23 each comprise a bolt 4 having -an extended shank 4a terminating in an enlarged corrugated head 4b, the shank 4a and the head 4b being encased in a sleeve 3 of elastomeric material.

The bolt 4 together with its encasing sleeve 3 pass through holes 1a in the baseplate l and corresponding holes 2a in the rail pad 2.

12 represents a nut on the threaded upper end of the bolt 4 while 8 represents a steel washer and 7 an elastomeric washer interposed between the steel washer 8 and the baseplate l.

The arrangement as so far described is such that when the nut 12 is tightened on the bolt 4 the bolt is caused to rise and the sleeve 3 of elastomeric material is compressed between the bolt head 4 and the washer 8 and hence tends to expand into engagement with the walls of the preformed hole 21 in the foundation 20.

The foundation 20 may be a sleeper or other analogous foundation and may be concrete.

When the nut 12 is further tightened down after the sleeve 3 has expanded into interlocking engagement with the wall of the foundation holes 21, the baseplate 1 will be held firmly down against the foundation 20 with the sleeve 3 and the rubber washer 7 in conjunction with the rail pad 2 serving to insulate the baseplate 1 from the foundation 20 and resiliently to mount the baseplate on the foundation.

30 represents a flat bottom rail resting on the baseplate 1 and according to the invention for securing the rail to the baseplate, a pair of clips generally designated 5 are provided, one on each side of the rail.

As will be seen from FIG. I the clips are of strip form in plan view and are each secured by bolts 11 to threaded inserts 9 located in preformed bolt holes 42 formed for the purpose in the baseplate l. 10 represents a steel washer between the head of the bolt 11 and each clip 5.

The bolts 11 pass through a cylindrical aperture 40 in each clip 5. As will be seen from FIG- 2 each clip 5 has symmetrically spaced about its bolt aperture 40 on a lower side a first pair of projecting heellugs 41 and on its opposite side a second pair of oppositely projecting heel lugs 41. v

The baseplate 1 has symmetrically spaced about the bolt holes 42 a pair of recesses 43 adapted to receive and locate a pair of the clip heel lugs 41.

It will be apparent from an examination of FIGS. 1 and 2 that each clip 5 may be disposed with its heel lugs 41 engaged in the complementary baseplate recesses in one of four alternative dispositions. Thus it may be located in the disposition shown in FIG. 2 or the clip may be rotated through in the plane of FIG. 2 and hence inverted to give a second disposition. Alternatively and referring to FIG. 1 the clip may be rotated in the plane of that Figure through 180 to give a third dispostion and then inverted to give a fourth disposition.

For each of the alternative dispositions in which each clip can be arranged, it has a respective rail foot abutting and clamping shoulder facing inwardly towards the rail foot. Thus the clip 5 on the left of FIG. 2 has four rail foot abutting and clamping

shoulders

45a, 45b, 45c, 45d respectively. Similarly the clip 5 on the right of FIG. 2 has four rail foot abutting and clamping

shoulders

45e, 45f, 45g, 45h.

An essential feature of the invention is that for each clip each of its rail foot abutting and clamping shoulders is difi'erentially spaced from the centre of the clip bolt aperture 40 of that clip. Thus the

shoulders

45a, 45b, 45c, 45d are each differentially spaced from the centre of the clip bolt aperture 40.

If the disposition of the clip 5 on one side of the rail is changed, clearly the clip onthe opposite side of the rail must also be changed in order to be in proper clamping relationship with the rail foot.

if then the clips on the two sides of the rail are identical, the rail can be adjusted laterally and clamped in one of four positions. If, however, the two clips are not identical and all the eight shoulders of the two clips are differentially spaced from the clip bolt centre lines, the number of possible positions for the rail in which it can be located and clamped will be doubled by interchanging the clipsfrom one side of the rail to the other.

' The second embodiment of the invention illustrated in FIGS. 4, 5 and 6 differs from the first embodiment in two main respects.

Firstly the same bolt anchorage devices are employed both to secure the baseplate l to the holes 21 in the foundation and to secure the clips 5 to the baseplate l.

Secondly each clip 5 has eight lugs 41, four on the upper side as shown in the drawing and four on the lower side and there is a complementary rail foot abutting and clamping shoulder for each lug, eight in all, each differentially spaced from the centre of the clip bolt apertures 40 of the respective clips,

The bolt anchorage devices at the respective sides of the rail are generally designated 61 and 62 respectively. Each device comprises a bolt element 68 having a head 68a and a threaded shank portion 68b. The shank portion 68b is in threaded engagement with an elongated nut element 64 encased in a sleeve 63 of elastomeric material. The lower end 64b of the nut element is enlarged and corrugated. The upper end of the nut element'64 has 'a non-circular exterior engaged in a correspondingly shaped hole It; in the baseplate, so that the nut cannot rotate relative to the baseplate although it can move vertically over a sufficientdistance to enable the sleeve 63 to be expanded to engage the wall of the foundation hole 21.

The bolt 68 passes through an aperture 40 in each

clip

5 and 67 represents a washer between the bolt head 68a and the upper surface of the clip.

Tightening down of the bolt 68 firstly causes upward movement of the nut 64 to effect expansion of the sleeve 63. After the non-circular upper end of the nut has engaged fully in the non-circular hole 1a in the baseplate to bring a shoulder 64a against the underside of the baseplate, further expansion of the sleeveis prevented and thereafter further tightening of the bolt causes its head 68a to approach the baseplate 1 thereby tightening 'down the clip 5.

Reference to FIG. 4 will show that the lugs 41 are symmetrically spaced about'the clip bolt aperture 40. The baseplate 1 has four recesses 43 symmetrically spaced about each of its bolt holes'42.

As with the arrangement described with reference to FIGS. l to 3, the clips are invertible. Therefore if the clips on each side of the rail are identical, the rail may be adjusted to one of eight different positions by appropriate adjustment of the clips. If, however, the clips are dissimilar and complementary, as shown in FIGS. 4 and 5, with all the 16 rail foot abutting and clamping shoulders being differentially spaced from the centres of the clip bolt aperture 40, the rail may be adjusted to sixteen different positions, with the clips being interchanged when necessary.

As will be seen from FIG. 4, complementary clip positions may be indicated on the clips by appropriate markings for example the alphabetical letters shown.

We claim:

1. A rail fastening arrangement for securing a flat bottom rail on a foundation having preformed holes therein comprising in combination a. a baseplate on which the flat bottom of the rail is adapted to rest and means for securing the baseplate to the performed holes in the foundation;

b. a pair of rail clips one on each side of the rail;

(1. each clip having symmetrically spaced about its bolt aperture at least one pair of projecting heel lugs and the baseplate having symmetrically spaced about its bolt hole a complementary number of recesses adapted to receive and locate the clip heel lugs;

. each clip being engageable with the baseplate with its lugs received and located in the baseplate recesses, in at least two alternative dispositions;

f. and each clip having for each lug a respective rail foot abutting and clamping shoulder, one of which rail foot abutting and clamping shoulders faces inwardly towards the rail foot for each alternative disposition of engagement of the clip with the baseplate;

. and wherein for each clip, each respective rail foot abutting and clamping shoulder is differentially spaced from the centre of the bolt aperture of the clip and wherein each clip has upper and lower oppositely facing sides, there being on each of said sides at least one pair of said projecting heel lugs symmetrically spaced about the bolt aperture of the clip, and for each lug on each of said upper and lower opposite sides a respective rail foot abutting and clamping shoulder, each respective such shoulder being differentially spaced from the centre of the bolt aperture of the clip.

2. A rail fastening as claimed in claim 1, wherein the two rail clips one on each side of the rail are identical with one another. a

3. A rail fastening according to claim 1, wherein each clip has on each side of its upper and lower oppositely facing sides four heel lugs symmetrically spaced about the bolt aperture of the clip, and for each lug a respective rail foot abutting and clamping shoulder, with all sixteen of the rail foot abutting and clamping shoulders of the two complementary clips, one on each side of the rail, being differentially spaced from the bolt apertures of the respective clips.

4. A rail fastening arrangement according to claim 1, wherein the pair of clips, one on each side of the rail, each have at least two respective rail foot abutting and clamping shoulders, with all said respective rail foot abutting and clamping shoulders being differentially spaced from the bolt aperture centres of their respective clips, and the pair of clips being interchangeable,

one with the other.

5. A rail fastening arrangement according to claim 1, wherein the same bolt means which are employed to secure the clips to the baseplate, are also employed to secure the baseplate to the foundation, the baseplate having only two through holes preformed therein, said holes registering with two preformed holes in the foundation.

6. A rail fastening arrangement according to claim 1, wherein the means for securing the baseplate to the preformed holes in the foundation comprise, two threaded elements in threaded engagement with one another, a first one of said elements having an elongate cylindrical portion terminating in an enlarged head, an externally cylindrical sleeve of elastomeric material encasing said elongate cylindrical portion and said enlarged head, said elastomeric sleeve when substantially undeformed being a sliding fit within a foundation hole, and said second threaded element being rotatable in one direction relative to the first element to cause, firstly, the first element to move axially towards the second element,-this effecting deformation of the elastomeric sleeve into engagement with the wall of the foundation hole, and following such engagement, the baseplate to be urged towards the foundation.

7. A rail fastening arrangement according to claim 6, including a pad of elastomeric material disposed between the baseplate and the foundation.

8. A rail fastening arrangement according to claim 6, wherein said first threaded element is a bolt whose stem is surrounded by said elastomeric sleeve, said stem and said sleeve passing from below through a hole in the baseplate and wherein said second threaded element is a nut, there being a metal washer located between the nut and the elastomeric sleeve, whereby on tightening said nut on said bolt, firstly said bolt is moved axially upwardly and said sleeve is compressed between the enlarged head of the bolt and said washer, and is deformed into engagement with the wall of the foundation hole, and following such engagement and on fur- 10. A rail fastening arrangement according to claim 6, wherein the metal baseplate has non-circular through holes located to register with the preformed holes of the foundation and wherein the bolt means securing the baseplate to the foundation pass through the holes in registry, with each foundation bolt means comprising a bolt .passing through the baseplate to engage a nut member located in one of the foundation holes, the nut member having an elongate shank terminating at its end remote from the bolt in an enlarged head, said head and said shank being encased by a sleeve of elastomeric material, and wherein on said bolt being tightened, said nut is moved axially, with said elastomeric sleeve being compressed between the enlarged head of the nut and the baseplate, so that said sleeve is deformed into engagement with the wall of the foundation hole, and further, wherein said nut member has its end adjacent the baseplate so shaped that it can enter and key with one of the non-circular holes of the baseplate, whereby said nut is prevented from rotation relative to the baseplate.

11. A rail fastening arrangement according to claim 10, wherein said bolt also passes through an aperture of a rail clip having its lugs located and received in corresponding baseplate recesses, and wherein tightening of said bolt is effective to urge said rail clip towards said baseplate.

Claims

1. A rail fastening arrangement for securing a flat bottom rail on a foundation having preformed holes therein comprising in combination a. a baseplate on which the flat bottom of the rail is adapted to rest and means for securing the baseplate to the performed holes in the foundation; b. a pair of rail clips one on each side of the rail; c. bolt means passing through a bolt aperture in each clip and engaging in a preformed bolt hole in the baseplate; d. each clip having symmetrically spaced about its bolt aperture at least one pair of projecting heel lugs and the baseplate having symmetrically spaced about its bolt hole a complementary number of recesses adapted to receive and locate the clip heel lugs; e. each clip being engageable with the baseplate with its lugs received and located in the baseplate recesses, in at least two alternative dispositions; f. and each clip having for each lug a respective rail foot abutting and clamping shoulder, one of which rail foot abutting and clamping shoulders faces inwardly towards the rail foot for each alternative disposition of engagement of the clip with the baseplate; g. and wherein for each clip, each respective rail foot abutting and clamping shoulder is differentially spaced from the centre of the bolt aperture of the clip and wherein each clip has upper and lower oppositely facing sides, there being on each of said sides at least one pair of said projecting heel lugs symmetrically spaced about the bolt aperture of the clip, and for each lug on each of said upper and lower opposite sides a respective rail foot abutting and clamping shoulder, each respective such shoulder being differentially spaced from the centre of the bolt aperture of the clip.

2. A rail fastening as claimed in claim 1, wherein the two rail clips one on each side of the rail are identical with one another.

4. A rail fastening arrangement according to claim 1, wherein the pair of clips, one on each side of the rail, each have at least two respective rail foot abutting and clamping shoulders, with all said respective rail foot abutting and clamping shoulders being differentially spaced from the bolt aperture centres of their respective clips, and the pair of clips being interchangeable, one with the other.

6. A rail fastening arrangement according to claim 1, wherein the means for securing the baseplate to the preformed holes in the foundation comprise, two threaded elements in threaded engagement with one another, a first one of said elements having an elongate cylindrical portion terminating in an enlarged head, an externally cylindrical sleeve of elastomeric material encasing said elongate cylindrical portion and said enlarged head, said elastomeric sleeve when substantially undeformed being a sliding fit within a foundation hole, and said second threaded element being rotatable in one direction relative to the first element to cause, firstly, the first element to move axially towards the second element, this effecting deformation of the elastomeric sleeve into engagement with the wall of the foundation hole, and following such engagement, the baseplate to be urged towards the foundation.

8. A rail fastening arrangement according to claim 6, wherein said first threaded element is a bolt whose stem is surrounded by said elastomeric sleeve, said stem and said sleeve passing from below through a hole in the baseplate and wherein said second threaded element is a nut, there being a metal washer located between the nut and the elastomeric sleeve, whereby on tightening said nut on said bolt, firstly said bolt is moved axially upwardly and said sleeve is compressed between the enlarged head of the bolt and said washer, and is deformed into engagement with the wall of the foundation hole, and following such engagement and on further tightening of said nut, said washer is caused to bear on the baseplate to urge the latter towards the foundation.

9. A rail fastening arrangement according to claim 8, including an elastomeric washer located between said metal washer and said baseplate.

10. A rail fastening arrangement according to claim 6, wherein the metal baseplate has non-circular through holes located to register with the preformed holes of the foundation and wherein the bolt means securing the baseplate to the foundation pass through the holes in registry, with each foundation bolt means comprising a bolt passing through the baseplate to engage a nut member located in one of the foundation holes, the nut member having an elongate shank terminating at its end remote from the bolt in an enlarged head, said head and said shank being encased by a sleeve of elastomeric material and wherein on said bolt being tightened, said nut is moved axially, with said elastomeric sleeve being compressed between the enlarged head of the nut and the baseplate, so that said sleeve is deformed into engagement with the wall of the foundation hole, and further, wherein said nut member has its end adjacent the baseplate so shaped that it can enter and key with one of the non-circular holes of the baseplate, whereby said nut is prevented from rotation relative to the baseplate.