US1354705A

US1354705A - Mold for concrete

Info

Publication number: US1354705A
Application number: US346194A
Authority: US
Inventors: Rowland T Wales
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-12-19
Filing date: 1919-12-19
Publication date: 1920-10-05
Anticipated expiration: 1937-10-05

Description

R. T. WALES.

IV IOLD FOR CONCRETE. APPLICATION FILED DEC-19, 1919.

Patnted Oct. 5, 1920.

2 SHEETS-SHEET 1.

R. T. WALES. MOLD FOR CONCRETE. APPLICATION FILED DEC. 19,4919. 1,354,705. Patented 001:. 5,1920.

2 SHEETS-SHEET Mm f VENTOR Y M M B Aziorne s,

UNITED STATES PATENT OFFICE.

ROWLAND T. WALES, OF NERV RQCI'IELLE, NEW YORK..

MOLD FOR CONCRETE.

1919. Serial To all whom it may concern:

Be it known that I, ROWLAND T. lVALns, a citizen of the United States of America, formerly residing in Sewaren, in the county of Middlesex and State of New Jersey, but now of New Rochelle, WVestchester county, State of New York, have invented certain new and useful Improvements in Molds for Concrete of which the following is a speci fication.

This invention provides certain improvements in molds for use in building structures of concrete or similar material, or for facing or covering structures with such material. The particularconstruction of molds to which these improvements apply embodies the following. The facing plates comprise panels of wood or of sheet metal against which the concrete or similar mate rial is molded. They may be simple boards or channels of sheet metal. The facing plates are called plates herein. They are supported by a framework comprising a series of supports disposed adjacent the mold space and preferably having flanges extending laterally from them and also ad jacent the mold space. The plates are held in position by means of locks which engage the supports. The supports maybe disposed vertically horizontally or inclined, to correspond with the face of the mold desired. Likewise they may be either straight or curved, a curved support being adapted for the inside of sewer or subway construction. The relative positions of plates, locks and supports will be substantially the same for different kinds of work. In wall forms the supports are also known as studs. in ceiling forms they are also known as joists. The supports may be secured and held in position by any usual or suitable method for securing and holding such members. An advantageous means is shown herein which comprises an improved kind of stringer. The plates are adjustable and movable relatively to the supports and adjustable into and out of position without affecting them. Plates are likewise adjustable and movable without affecting adjacent plates except in special cases. Each lock may be adjustable relatively to both plates and supports and without moving supports, other locks or other plates than the plate or plates imme diately held by it. Such construction permits using the same plates and. locks rt Specification of Letters Patent.

Patented Oct. 5, 1920.

Continuation of application Serial No. 153,559, filed March '9, 1917. This application filed December 19,

peatedly in different parts of the same framework of supports before a job is completed. t also permits taking down the supports after stripping of plates and using the same supports again in another part of the job. While two supports are in any one upright position, a plate can be used between them repeatedly at subsequently higher levels each removal of the plate being made after the concrete behind it has become hard enough to stand up in the small area which the plate covered. The con struction of molds described in the foregoing has the following advantages over other kinds of molds:

1. Uses less mold material on a single job.

2. Uses the same mold material repeatedly and without destruction on successive jobs.

3. Is erected and dismantled quicker and with less labor.

4. Permits easy placing and supporting of any iron reinforcement within the mold space before the plates are locked in position.

5. Possesses all advantages of panel molds without sacrificing the strength and accuracy possible by using studs or joists as in other kinds of molds.

This invention provides certain new and useful improvements pertaining to the construction described in the foregoing and has made it more practical. Some of the objects accomplished by these improvements are given in the following:

1. Improved method of engaging the supports by the locks, permitting maximum strength of both locks and supports with minimum size and weight of both. An improved shape ofboth support and lock to correspond with the improved method of engagement.

2. Improved splice for connecting supports end to end or for slightly increasing the length of a support.

Improved stringers and means for securing them to the supports.

' l. improved means for splicing stringers end to end.

5. Improved facing plate of sheet metal having an improved and simple means of forming its ends and stiffenin them without obstructing its mold face or its sides, and for adapting its ends to bear with substantial force against bars withow'nt collapsin tion.

7 where they meet.

6. Improved accessories for molding corners of walls in combination with the type of mold described herein and with minimum labor and waste of mold material.

In the accompanying drawings,

Figure 1 is a partial vertical sectional view on line 1 of Fig. 3. Everything in'the back ground relative tothe support is omitsection.

Fig. 3 is a general view showing parts assembled to form two walls and a corner It is a horizontal see- I tional view at the level of line 3 of Fig. 1.

Only the parts of the locks whichextend from the lateral sides of the studs'are shown. Their parts within the studs are removed from this view to avoid confusion with construction there shown. I

Fig. 4; shows a detail; It is a vertical section through an end stringer at either line i or line (4) of Fig. 3, and omits from view everything except the end stringer.

.-Fi.g. 5 is a view similar to Fig. 2. It shows a method of fastening the opposite lateral sides of a support together. It also shows how plates may consist of boards instead of panels and be held in position by -a flanged bar between them and the locks.

. Fig. 6 shows an enlarged detail looking toward the upper part of Fig. 1 as the arrow -marked 6 and shows a splice for connecting Fig. 10 is a view illustrating two details, 7

it being a vertical sectional view on line 12 of Fig. 3.

Flg. 11 shows a facing'pla te of sheet metal in vertical section at about line 13 of Fig. 12, omitting from view the flanged barM at the left of Fig. 12.

Fig. 12 is a horizontal sectional View through Fig. 11 and shows also a flanged bar ll/l'adjacent the end at the left of the .view', and flange F.

part of a support having a In the accompanying drawings, in Figs. 1, 2, 3, 5,. 6 and 7, there are shown supports each having lateral sides R, flanges F adjacent the mold space, a side J on the side opposite the mold space and a side formed by the wood part A adjacent the mold space. The parts R, F and J are shown formed of one piece of sheet metal bent into the desired shape, a channel bar in the present illustration. The lateral sides R are shown connected adjacent the open side of the channel bar by stove bolts G screwed into a tapped tube D. detail of this is shown in enlarged section in Fig. 9. There are several-fastenings like ((1 D) distributed longitudinally of each support as indicated by the screws C in Fig. 1. The holes in the lateral sides R which receive the bolts C are shown countersunk by a punch in Figs. 5 and 9. This permits the heads of the stove bolts C to be disposed'flush ,or below the surfaces of the lateral sides R. The members P of the locks are shown en a in the sunnorts and extending laterally from them through openings U in the lateral sides R. In Fig. 1, the positions of the openings U which are out of view from the observer'and are through the opposite lateral side of the sup port from the side shown are indicated by dotted lines and shown to be at different levels from those th'roughthe lateral side which is in view in this figure. With the holes ll distributed in this manner the locks extending through opposite lateral sides of the support cannot obstruct each other. T

Fig. 1 a plate K, comprising vtliour boards, is shown held in position adjacent the mold space and adjacent a flange F of the support. Part of another plate K is shown directly below. Locks (P C2) are shown holding'the plates. In Fig. 2 .is shown a transverse section through the same construction. It shows how a lock (P Q) is held engaged with the support and how its screw member holds the plate K in position adjacent both the flange F and the mold space. This screw Q; may be turned by a nail which may be inserted into one of the holes shown in Q near its outward end from the moldspace. These holes are preferably drilled at right angles to each other as shown. lVith this means of turning Q,

g a nail or pin may be used clear and free from obstruction by R or P. The channel shape G screwed to the boards of the plate K holds them together and reinforces their ends. Pressure between G andQ obviously prevents P being moved out of engagement with the support. The screw Q, is movable relatively to P toward and from the mold space. To disengage the lock from the support, Q is turned so that it moves relatively to P a suflicient amount to permit the outer end of P from the mold space to be moved laterally of the support sufficiently to emerge from the hole U. This position of P is indicated by dotted lines in Fig. 2. From this position P can then be moved outwardly of the mold space sufiiciently to disengage its end which is nearest the mold space. The member P is preferably a casting. These locks are comparatively small, compact and cheap and have great strength. They are simple, easy to operate and man of them can be conveniently placed in a pail, thereby facilitating their transportation. from place to place on the job, and their collection and preservation when the form is being taken down.v

The member P is shown bearing laterally against the inside of a lateral side R of the support at a point nearer to the mold space than the part of P at its entrance to the opening U through the same lateral side The lock is thus prevented moving laterally from the support past the end of the plate K. The member P near its end nearest the mold space is shown wide enough to extend substantially between the two lat eral sides R which are thus adapted to prevent the lock moving laterally of the stud in either direction. The outer end of P from the mold space is shown bearing outwardly of the mold space and against the inside of the support. side opposite from the mold space. The outer part of P from the mold space is also shown bearing laterally of the support and against the inside of the lateral side R- opposite from the side B through which P extends. This prevents the outer end of P from moving laterally of the support when pressure is applied on Q.

In Figs. 1, 3 and 6, V are tie rods for connecting supports on opposite sides of a wall or for otherwise holding them in position. In Fig. 6, V is shown in section and disposed in a hole through the support.

In Figs. 1 and 3, W are pipes encircling V and partly broken from view. They are sometimes used in the manner shown for the purpose of holding opposite sides of the mold properly spaced apart. X in Fig. 8 are sticks sometimes used for the same purpose. One is shown tied by wire to V and the other held in position by nails. L in Figs. 1 and 3 are the body parts of rod clamps adapted to act as nuts on unthreaded rods.

The channel bar H, in Figs. 1, 6 and 7 is the body part of a splice for connecting two supports end to end or for slightly increasing the length of a single support. This body part is shown fitted about three sides of a support and secured to it by bolts S having eccentric heads engaging the side of slots S in the back of the support. The eccentric heads of the bolts S are each shown of greater length than width. The slots S are out of view in Fig. 6 but are indicated by dotted lines. The heads of the two lower bolts S in Fig. 6 are indicated by dotted lines extending at right angles to the slots S. WVhile the heads S are being inserted or removed from the support, they must be turned parallel to the slots S. The nuts on S may remain at all times thereon and S remain at all times connected with H. It is only necessary to tighten or loosen the nuts when connecting H to a support or removing it therefrom. While the heads of the bolts S are in engagement with a support, they may be prevented from turning by nails or pins T shown. disposed through small slets in the sides of the support and of H. These nails or pins may if desired be replaced by wire. H is shown reversible end for end and is obviously adapted to connect either end of another support with either end or the one shown, because the supports are also designed to be reversible end for end. Since H, when connected with a support, prevents the engagement of locks therewith, bars N are shown riveted to the laterally extending anges B of H and carry screws Q for the same purpose as screws Q of the locks. The holes in N which receive the rivets O are countersunk as shown in dotted lines. Q and N on one side of H are shown dispesed at a different distance from the same end of H, from that of the parts Q and N on the opposite side of H. Their positions correspond as nearly as practical with the distribution of the holes U on opposite sides of the supports. While H is secured in position and the screws Q, have been moved sutfiriently outward of the mold, there is sutficient room between N and F or B and F to allow moving plates longitudinally of the support until past the ends of H.

.Y in Figs. 1, 3 and 8 is a stringer adapted for holding supports at proper intervals apart. End or splicing stringers Y are also shown in Figs. 1 and 8. Another inside stringer a is shown in Fig. 3. The stringers Y, Z, a, are secured to the supports by bolts (Id. The part q is a short channel shaped piece riveted to Y and furnishing a bearing surface for the nut on a bolt cl. Each bolt (Z has an eccentric head which is longer than wide. It is adapted to engage slots in the back of a support in the same manner as the bolts S already described and its head is prevented from turning by a nail or pin disposed through small slots in the lateral sides R of the support. In Fig. 1 and at two places in Fig. 3 is an end stringer Z adapted to be spliced to the end of a stringer Y and secured to a support near an end or corner of a mold. It is also adapted for securing tie rods longitudinally of it as illustrated by u and 10 It is also adapted for securing such rods so that they are adjustable longitudinally of it. For this, the end transverse face or shoulder through which 7 the tie rod passes, and against which bears a clamp secured to the rod. This is illustrated by 1 on the left side of Fig. 3. The part 1' is a short piece of sheet metal bent and perforated desired and is shown riveted to Z. It furnishes a bearing surface for the nut L on d and has an opening for admitting a tie rod u or other tension member. I prefer two holes 8 which are only visible in Fig. 4 but the part of 1 through which they pass is shown in Fig. 3 where Z and r are partly broken from View. This part of 7 also furnishes a bearing surface for either a nut or a rod clamp secured to a tie rod disposed longitudinally of Z and through one of the holes .9 and as illustrated in Fig. 3 at the end of L which is secured to the rod u. In Figs. 3 and 10, a is a corner stringer adapted to be spliced to the end of a stringer Y and secured to a support at the inside corner of a mold. Stringer a has a plate I? attached at its end. Both parts a and t are channel shaped and are shown riveted together. The part If furnishes a bearing surface for the nut on d. It also has holes for admitting tie rods disposed transversely of it. The rods u and u are disposed in such holes. The rods u and u are disposed in corresponding holes through both a and t. The holes through a and 2, through which 16 and u are disposed are preferably slots extending longitudinally to allow for variation in the horizontal alinement of u and u. The positions of the rods u and a show that t(he poles must be near the upper side of It is desirable also to have similar holes disposed near the lower side of (a t) for use when (a t) is used in a position reversed to that shown. The tension of the rod 24 is shown transmitted to the line of stringers Z Y inside the corner, by the corner stringer a, the rod 14 and the clamp L on u. u is disposed substantially in horizontal alinement with this line of stringers on the opposite side of the wall from o. This is true because u and u are sufficiently close together transversely of their length to adapt u to transmit tension to said line of stringers and longitudinally of them.

The hook shape of one end of u is shown encircled by wire to prevent it bending open. For a similar purpose wire is shown tied around the rod u at its hook.

In Figs. 3 and 8, Z) is a channel shaped head longer than wide and adapted to engage slots in the stringers as shown. These 'bolts may remain permanently connected to the splice 6 and their nuts are only tightened or loosened as required. Before passing the heads of bolts 6 through the slots it they are turned parallel to the slots. The heads of e have holes through them. The flanges of the splice and the adjacent sides of the stringers have holes corresponding to the holes through the heads of e. N ails or pins 9 are shown disposed through all these corresponding holes and prevent the heads of e turning parallel to the slots H when .in engagement with the stringers. ire may be used instead of pins. The webs of the stringers at their ends are shown reinforced by plates 2' fastened inside the stringers by rivets The heads of these rivets f on the sides of the stringers adjacent the splice and appearing only in Fig. 3, do not collide with the splice 7) because holes sufficiently large to clear them pass through 6. The positions of these clearance holes in b are indicated in Fig. 8 by dotted circles around 7.

In Fig. '3 at the corner of the mold L is illustrated a means for molding iusugi and outside corners with minimum loss o mold material and minimum labor. it permits using the same ribs 20 and w and the same boards K and K repeatedly and on walls of different thicknesses and different lengths and in combination with the entire mold shown herein.

In the plates shown at the outside faces of the corner of the mold many of the boards K may remain permanently nailed to 'w and 10. To vary the width of these outside plates, it is only necessary to add or remove boards at the edges'of the plates which are toward or at the corner of the mold space where the board K is shown. The ribs w, w and r0 are disposed substantially horizontial. The rice to and w" have surplus length extending beyond the corner of the mold and beyond 0. Above and below each rib 10, w and Q02 are other ribs like it and not appearing in the figure. The boards K are each disposed vertically. The inside corner plate has at one face of the corner a vertically extending timber m which is preferably secured to each rib by a lag screw w. esides providing a part ofthe mold space, 0 also acts as a stud and receives the lateral strain of the ribs 10 it thus prevents each rib 10 concentrating its pressure against the lateral side R of the adjacent regular stud. This is advantageous because the adjacent regular stud is not adapted to receive great pressures laterally at any point except near the levels of the stringers which hold the regular stud in position.

The ribs w and 10 are connected by tie rodsV and rod clamps 0 and p which are adjustible on V at different distances from the mold space. The ribs w and 'w where they extend beyond the outside corner of the mold space are held in position by the upr1ght metal stay o winch is nisposed outwardly of them from the corner of the mold space. This stay 41 is shown sec red to strin ers Z and Y b tie rods a and i. J

together with rodclainps p and L which adapt the rods to hold the stay c in different positions relative horizontally to the nearest supports. At its lert end the rod 1& is hook shaped with the short side of the hook uppermost as indicated by dotted lines. T he upper side of the hook is disoosed through the upper hole 8 shown in *ig. i and the lower side or main part of the rod is dis posed through the lower hole 8 shown in 4-. The ribs to of the plate on one face of the corner, are shown extending from points near the lateral side ll of one of the regular studs. bl ear this stud the ribs to are shown held in position byan upright metal stay 4) held in position by the tie rod a and another like u out of view below it. The clamp L on a adapts it to hold 0 at different distances from the mold space.

Fig. 5 is a sectional view through a flanged bar M of special shape and having a flange which extends between a lateral side R of the support and the adjacent end of K. K is one of a plurality of plates in the form of boards disposed in a similar manner to K of Fig. 1, but not fastened together in the form of large plates or panels. Each bar like M is adapted to hold the ends of a plurality of boards K in position distributed longitudinally of it. The molding face of K is shown having a recess. Part of the recess acts as a seat bearing against a flange F of the support. M is held in position as shown by the lock (P engaging the support. Instead of boards I it is advantageous in some work to use sheet metal plates and secure them in position in the same manner by M. An improved plate for this purpose is shown in Figs. 11 and 12. M is also shown adjusted to it in Fig. 12. The plate comprises a sheet metal channel (2 .2). its web .2 provides the face for disposition adjacent the mold space. Its sides 2 extend outwardly of the mold space and preferably have flanges e at a substantial distance therefrom. The web 2 forms nearly all the molding face of the plate but is cut away at each end of the plate to form a recess in the molding face. A slight portion of each side 2 is also shown cut away at its end to correspond with the depth of the recess. The surface within the recess is shown disposed against a flange F in the same manner as the surface within the recess in K in Fig. 5. -The recess permits the molding faces of both plate and support being in substantially the same plane and forming a more uniform surface on the concrete. The sides 2 of the channel extend beyond the end of the web a and, at the corners of the plate are bent so that they form laps .2 which are shown as forming part of the end surface ofthe plate. These laps are preferably fastened to 2 by welding but they could be riveted to it. The end piece 2* is an angular shaped piece of sheet metal extending between the sides 2 of the channel and between the web 2 and the laps .2 lVithin the said recess, 2 forms the surface which is disposed against the flange of the support. The flanged bar M and the flange F of the support, are not shown in Fig. 11.

Any suitable rod clamps or nuts may be used on any of the tie rods in any construction shown in this application and in place of any of the rod clamps shown herein. In Fig. 8, 0 and p are rod clamps which present a flat end to the surface which bears against them. They are therefore more suitable for use against wood members like the ribs to and 202. They have screws adapted to press against opposite sides of a rod. In 0 each screw is not directly opposite another. In 39 each screw is directly opposite another. This clamp 19 has more pairs of screws like that shown but they are masked from view by Y. Any of the rods V or V may be used with a rod clamp at only one end. In such case there could be threads on the other end of the rod for only a short distance and a nut thereon. Any long variation could be accommodated by the rod clamp and tension could be applied by a few turns of the nut. Instead of being hook shaped at one end, 20 could be secured to Z in the same manner that u is secured to the other Z shown. At the other end of a p could be replaced by a few threads and a nut thereon. In a similar manner 'zficould be secured to o by a nut. 24- could also be secured to an end stringer like Z in the same manner shown for a. In such case Y at the right of Fig. 3 would be moved to a greater distance from 1 and an end stringer like Z spliced to its end for connecting with 16 In similar manner the hook end of u could be straight and threaded a short distance and a nut thereon hearing against (a 6).

Any of the tie rods .7, V, a, a or u may be replaced by other suitable tension members which are adjustable for holding parts of the mold at different distances apart or at different distances from the mold space. Wire is a satisfactory tension memher for this purpose and may be tightened by suitable wire clamps in common use by builders. lVithout wire clamps two lengths ofwire may be twisted together by a stick in the manner of a tourniquet which has also been a common practice among builders.

. stringers for holding the supports at proper.

welding.

What I claim is 1. A mold comprlsmg a series of supports adjacent the mold space, plates between the supports and adjacent the mold space, said supports having lateral openings, locks extending laterally from the supports and holding the plates in position, each of said locks bearing against a su port outwardly of the mold and extending literally through one of said openings and adapted to bear laterally against the support at a point nearer to the mold space than the part or said lock within said opening.

2. A mold according to claim 1, a lock thereof having a member disposed laterally of the support and movable toward and from the mold space, said member being adapted to prevent a plate moving outwardly of the mold.

3. A mold according to claim 1, a lock thereof having a screw arranged laterally of the support and movable toward and from the mold space, the screw being adapted to prevent a plate moving outwardly of the mold.

4. A mold comprising a series of supports adjacent to the mold space, plates between the supports, the supports being hollow and having lateral openings and locks engaging the supports and holding the plates in position, such locks entering the support, having a part extending laterally through an opening, and having bearing points within the support, the one bearing outwardly of the mold space and the other nearer the mold space than said lateral part and bearing laterally against the support. 7

5. A mold according to claim 4, the locks thereof having each a member engaging the lateral part of the lock outside the support and adapted to be tightened to resist pressure from the plate and when so tightened to hold the bearing portions of the lock in engagement with the portions of the support against which they bear.

6. A mold comprising a series of supports adjacent the mold space, having longitudinal slots, plates between the supports and adjacent the mold space, locks held by the supports and holding the plates in position,

intervals apart and having bolts which engage said slots in the supports, each said bolt having its head disposed within a support, the head of the bolt being longer than its width and adapted to be disengaged from the support when the length of the head is turned parallel to the slot in which the bolt is dis osed.

7 mold comprising a series of supports adjacent the mold space, plates between the supports and adjacent the mold space, locks held by the supports and holding the plates in position, stringers for holding the supports at proper intervals apart, a splice for connecting two stringers end to end, and a bolt for uniting the splice to a stringer, engaging a slot in one of said parts, said slot elongated transversely of the stringer, and the bolt having a head longer than wide and adapted to be inserted through such slot, and to be turned transversely thereto.

8. A mold for forming two walls and an inside cornerwhere they meet and comprising for each wall a frame of studs and stringers, the studs being on the face of the wall, plates between the studs and adjacent the mold space, the studs having flanges adjacent the mold space, a flange of the stud on the inside of one of the walls and nearest the corner being separated from the nearest stud on the inside of the other wall by a single intervening facin plate adapted to be altered in width, the rame of studs and stringers on the inside of one said wall being connected with the part of the mold for the other said wall by a tension men ber disposed substantially parallel to the stringers in said frame and adjusted in length to correspond with the width of said sition, said stay being adjustable into positions at different distances from one said frame and held at the desired distance from said frame by a tension member connecting it thereto.

10. A mold for forming two walls and an outside corner where they meet, and comprising studs adjacent the mold space, plates between the studs and adjacent the mold space, stringers holding the studs at proper intervals apart, a corner plate on a face of the outside corner and having outside ribs, an upright stay outside of said ribs, and a tension member for anchoring said stay adapted to transmit tension to the frame for the inside of the wall which extends transversely to said plate and ribs. 7

11. A mold comprising aseries of supports adjacent the mold space, plates between the supports. and adjacent the mold space, locks held bythe supports and holding the plates in position, a splice for connecting two supports end to end by bolts substantially parallel to the length of said support, each said bolt having a head which is longer than wide and thus adapted to be held in position when disposed with the length of its head extending transversely of the length of the corresponding one of said slots.

12. A mold comprising a series of supports adjacent the mold space, plates between the supports and adjacent the mold space, locks held by the supports and hold the plates in position, a splice connecting two supports end to end by bolts engaging slots in the outward faces of the supports, the long dimension of each said slot being disposed substantially parallel to the length of a said support, each said bolt having a head which is longer than wide, means engaging said head for preventing the head turning when in position, whereby the head is held extending transversely of the length of the slot which the bolt engages.

13. A moldcomprising a series of supports adjacent the mold space, plates be tween the supports and adjacent the mold space, locks held by the supports and holdthe plates in position, stringers for holding the supports at proper intervals apart, asplice for connecting two stringersend to end, a belt for uniting the splice to a stringer, engaging a slot in one of said parts, said slot elon ated transversely of the stringer, the bolt having a head longer than wide, and adapted to be inserted through one of said slots, means in contact with said head for preventing the head turning when in position and with its longer dimenslon disposed transve sely of the length of the en ages.

- which the bolt A. it mold comprising a series of supports aojacent the mole space having longitudinal slots, plates between the supports and adjacent the mold space, loci-Is held by the supports and holding the plates in posiion, stringers for holding the supports at proper intervals apart and having a bolt which engages a slot in the outward face of a support, the long dimension of said slot being disposed transversely of the length of stringer, said bolt having its head disposed within the support, the head of the bolt being longer than wide, means engaging said head for preventing the head turning when in position and whereby the bolt is signed my name.

held with the length of its head extending transversely of the length of the slot which the bolt engages.

15. A. mold comprising a series of sup ports adjacent the mold space, plates between the supports and adjacent the mold space, locks held by the supports and holding the plates in position, stringers for holding the supports at proper intervals apart, a stringer having a bearing surface extending transversely of it, said surface having an opening adapted for receiving a tie rod disposed parallel to said stringer, such tie rod, and a clamp secured thereto, such clamp engaging said bearing surface to anchor the tie rod.

16. A mold comprising a series of supports adjacent the mold space, plates between the supports and adjacent the mold space, locks held by the supports and holding the plates in position, a splice connecting two supports end to end by bolts engaging slots in the outward faces of the supports, the long dimension of each said slot being disposed substantially parallel to the length of said support, each said bolt having a head which is longer than wide, means adapted to be inserted within the support and engage said head for preventing the head turning when in position, whereby the head is held extending transversely of the length of the slot which the bolt engages.

17. A mold comprising a series of supports adjacent the mold space having longitudinal slots, plates between the supports and adjacent the mold space, locks held by the supports and holding the plates in position, stringers for holding the supports at proper intervals apart and having a bolt which engages a slot in the outward face of a support, the long dimension of said slot being disposed transversely of the length of a stringer, said bolt having its head disposed within the support, the head of the bolt being longer than wide, means adapted to be inserted within the support and engage said head for preventing the head turning when in position and whereby the bolt is held with the length of its head extending transversely of the length of the slot which the bolt engages.

In witness whereof, I have hereunto ROWLAND T. ALES.