US987266A

US987266A - Foundation apparatus.

Info

Publication number: US987266A
Application number: US59517710A
Authority: US
Inventors: Stewart K Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-12-02
Filing date: 1910-12-02
Publication date: 1911-03-21
Anticipated expiration: 1928-03-21

Description

s. K SMITHQ FOUNDATION APPA RATIIS. APPLICATION FILED D110. 2, 1910'.

. Patented Mar. 21; 1911 J l I support,-

may' supported on -columns ,fi

blocking, or other constructiona 1,.-

UNITED STATES PATENT OFFICE.

STEWART K. SMITH, OF VINTONDALE, PENNSYLVANIA.

FOUNDATION APPARATUS.

Specification of Letters Patent.

Patented Mar. 21, 1911.

Application filed December 2, 191b. Serial No. 595,177.

lb all whom alt may concern: V

Be it known that I, STEWAlt-ili, SMITH,

a citizen of the United States, residing at Vintondale, in the county of Gambria and State of Pennsylvania, have invented certain new andiuseful Improvements'inFoundation Apparatus; and I do herebydeelare the'following to be a full, clear, and exactdescription of the invention, suchas will enable others skilled in the art to which it appertains to make and use the same.

My inventionconsists of apparatus for excavating and preparing foundations, and

is. partieularly applicable to those which are sunk in soft soi sand, gravel or the like, and is also especially adapted for such work which. extends under water.

My apparatusis mounted which can be used either on dry land,' or over water, or wherethe foundations are to be,prepared under. a body of water, I may usea scow, barge, or other floating In case I desire-to use my apparatus on land which'h'as either a level or an irregular surface, I construct a platform or' support .for the same, of timber, the details of which "are immateriahthe principal requisite of same being that it shall be of size and strength forholding my-a paratus thereon,- and ifdesired, to be capab e of'being moved from place topla'ce. Thi's'lower supporter platform may be similar in plan to-that shown on the drawing herewith, but the platform itself need not be as thick as the scow whichis illustrated, andsaid platiorrn' est not illustrated :a-v platform in the drawing herewith, as the above description is deemed sufficient to enable any. mechanic to construct the same, i

The drawings accompanying this specification show, for convenience of illustration, 4e

a scow for supporting the ,rnechanical portions of my apparatus, and this may also :carry the concrete'. shell or lining or. other materials. v p

My apparatus comprises ainetal 1pc, or

hollow shaft, open at the bottom an carrying an expanding cutting tool neari-its lower end; this pipe is connected atits top through. a coupling having a suitable stufiing box on a plat-form which allows the pipe to revolve while the couplingis held in place and connected by a pipe or flexible hose to a pump, siphon or other suction and lifting apparatus. This pipe, with its attachments is supported from a platform or: frame, mountedon the scow, by means of an adjustable suspension rod, and is thereby adapted to be raised and lowered as'desir'ed.

A tube or trough .is adapted to discharge water into the excavation, if desired, said discharge pipe-being. connected with a centrifugal pump, or other source of water supply under such pressure as may be required.

The pipeor hollow shaftliereto fore mentioned is provided with means for'revolving the 'same and the expanding cutting tool earned thereby, and means are-, also provided for expanding or contracting said cutting tool, if desired.

As the cutting tool is revolved and lowered within the excavation, I support the sides of said excavationby a hollow.eylindrical, shell of concretegOI other material surrounding said pipef'at'a suitable distance therefrom, the said shell being composed of sections of suitable size which are put in from time to time, as required, by the lowering of the previous ones; shell is supported by-a series of rods or othermeans,- which are in turn carried by a trestle or framework mounted on. the scow, and saidtrestle or framework may be adapted to be-moved up and down bodily, and the rodssupporting the'shell are also capable of separate up. and-down movement and adjustment for a similar purpose. As the zexpanding cutting tool is lowered and 're-- .volved, water is sup lied to the excavation, if desired, by the tuEe or trough heretofore mentioned, and this water, carrying"with it the excavated material, is withdrawn from the excavation by the pumpor suction apparatus. If water naturally collects in the This cylindrical excavation, no extraneous supply of water is needed. As the expanding cutting tool is. lowered it is maintained at anapproximately uniform diameter to correspond with that of; the exterior of the'shell or lin ing, and after it has reached the required depth, it may be expanded and the revolution and excavation continued, whereby a spread footingfior base is provided for the excavation. After the excavation is cornpletcd just described, the cutting tool is contracted, and lifted out of the excavation by raising the pipe or hollow shaft, on the lower end of which said' cutting tool is mounted, the rods for supporting the shell etc., are then withdrawn, and the interior filled with concrete or other material, thus providing a substantial fo"ndatio n with an enlarged footing. By thismeans I provide a foundation, the major portion or shaft of which is of comparatively small size, thus conducing to economy of excavation and foundation material, while the footing for same is enlarged, thereby giving it a much greater capacity for supporting loads, or

Having thus given a general description of my invention, I'will now, in order to make the same more clear, refer to the annexed sheet of drawings in which like charactersv of reference represent like parts.

Figure 1 is a diagrammatic cross sectional elevation of my apparatus in place, mounted. on a scow adapted to float in water and to be anchored at the chosen location therein. Fig. 2 is a diagrammatic plan view of my apparatus. Fig.- 3 is a central, vertical sectionalelevation of my expanding cutting tool, mounted on the pipe within the excavation; the cuttin tool in this View being expanded to the extent necessary for preparing the bore for the cylindrical shell. Fig. his a vertical central cross section on a freduced scale of one of my complete foundation piers 'or piles with a spread bottom'. Fig.6 is a detail drawing on a larger scale thanFig. 1 showing the

gears

10 and 11 and the construction for maintaining them in mesh with each other, and also shows a spline. by which the gear 10 revolves the'hollow shaft9. Fig. 6 is a cross sectional elevation of the lower part of my casingshowing the dowel or tongue and groove sections and method of supporting and lowering same by means of the hooks on therods'19 and also shows bands orwires securing together the two halves or portions ofe'each section of the casing. forming one ring.

-Referring now-to the various characters of reference on the drawings :-1 indicates the scow or platform on which my apparatus is mounted, provided with spuds or anchors 2 which are adapted to be raised discharge of the same therethrough, there 'by raising or lowering the plungers .5 and the attached cross pieces 6 as desired. The fluid pressure may be provided from any suitable source and controlled by valves, not shown. Although I have shown these supports 3 as fluid pressure cylinders, the platform, cross pieces and attachments may be supported and adjusted in any other manner, as may be expedient or desirable.

Although for convenience of illustration I have shown the beams 6 at a .compara tively low elevation and the supports 5 as rather short and of small movement, I may,

of course, place these beams higher and make the supports longer and of greater n'1ovement, i f necessary, to properly handle the parts attached'thereto.

On the cross pieces 6 is mounted the beam 7 through which passes the rod 8, provided with a collar and set screw, or other adjust ing means, to form a variable support for the pipe or hollow shaft 9 on which the bevel gear 10 is secured, but slidably mounted in a longitudinal direction, for the purpose of revolving said pipe or shaft and the cutting tool attached to the lower end thereof. The bevel gear lOis revolved. by the'bevel pinion 11 which is connected with any suitable source of power. As shownin Fig. 5 the bevel gear 10 is supported by the. duplex bearing 40 which has a bearing which also maintains the bevel pinion 11 in mesh with the bevel gear 10, while at the same time the bevel gear 10 is slidabl mounted on the hollow shaft 9 .and is adiipted to revolve said shaft by means of the spline or feather l1.

Referring to Fig. 6i-rods 19 are shown .as made insections which are coupled together by means of internally threaded screw sockets 42 which fit on the correspond:

ing external threads on the rod. sections after the fashion of a pipe joint,'and the rod 8 maybe similarly joined together in sections, if desired, or all these rods mayxbe joined together in sections with joints flush on the outside, all as elsewhere referred to herein.

At the upper end of the pipe or hollow shaft 9'iscouplihgrand'stuflinE box'1 2 which constructed after theffas ion. of a swivel so :as vto-permit -revo1iition of the pipe wv-hzi'lemaintaininga .tight'connection of.

hii'eemd'fflo the centrifugal suction. pump 1d,. m- ;to a-l plion orrother means for'drawingj;

' esciivatnd mater-mlsmixd withwater, 10

' and I in relation with from :tlie botto n-oftthe excavation through the hollow shaft" 9 and discharging the same wheredesired.-.

diargewatmq-intothe excayation, if desired,

"and 'is conneoted with acentrifugal pump indieatedas 16,0r iii-other means'fior I purpo'wg .the suction pipe ofsaid pump beingindicated as 'lT-.

The cylindrical} casin of the-'emvat-ion are indicated as 1-8: an :m becomposed of concrete or other -materlal made tions, hs 'shown, d or convenience-pf placing'in- 'tien, these are eadij re e r-' ably form "as halves or portions-o a q-- lindiical annulus and-pro ded-with-tong'ue's said shelli-or 18. may be u getlier by means o -a 'flat'bandindioated by end of one :of-'tlie ods 19 adapted to {it the hole 38-inzthe lower 34, or by means of a wire twisted around'same indieatedas35. "f 37 indicates a hook jormed on the, lowir0 m f h f d i 18/ art cpl ose-o 'su porting-an owermg same in po sition, and said hook may be is-- charged therefrom by lowerin the rod 19 and pulling it sideivise; as will evident.

39 indicates the hook on the lower 'end of one of the rods 19'-adapted to engage the lower edge of the bottom sections of the cylindrical casing 18' for the purpose oi' 'sup porting andolowerin same, the disengagement of this hook being. accomplished when desired, by lowering the same'after the easing is otherwise sup rted, either by friction or by contact with'the lower ortion of the excavation. The hook may, en be pushed to one side or turned around and partially revolved or withdrawn. This casingcomposed of sections 18 is supported and lowered by means of the rods 19, the lower ends of which engage the lower shell 18 by

hooks

37 or 39, while the upper ends of said .together'after the fashion of a fins fwimth threaded ends and'coupling sockets, or

rods is- .awen ,at their lower endsof: saidmembers cured to the sliding-collar 26 mounted on the shaft 9 as shown,-and preventedfrom turning thereonbyrods pass through the beams 20 and are adjustably on same by 10f slidable .coLars andset screws as indicated, (why other means as-desimd. In order to allow for greater or lessfdgfith ofexcavation*and to permit han 19, these may be made in seetionsor shorter lengths screwed to ther as required, and this is similarly true 0 jp pe' a? the 8 which supp'orts holloy'v'- shaftmentsor and the rod 8* which supports the pipeor 'ollowshafttland its attachments, may "eaoh 'be made in-,.onelong length, or may. be madein'sections screwed or ointed they may be jointed 'by having successive latter joining of known and customary conit'iisinot illustrated; as itwill be ieinale thread.

-.obv ious toany. mechanic.-

- Referring now :to my. expanding cutting tool as artimhr'ly fliown in Fig. 3, this is menu l'owshaft is provided with a spline orfeather22. u

of a wee islmade in the form pivoted near the ting: 21-

through; the

oftlie pipeby thc'pins Sfil wkich inturmare tliefiowereollzr. is

secured the-lower 'end of: the shaft Qby rivets or bolts as showin or by othen means. The 11p 'er'nieinbers oi my cutting too are indicated as 25 an are pivoted ds-togthe upper ends of the cutting members 21' 'as' shown, the upper 25 beingpivotally seand a 'correspondm on thelower-endpf the pipe or holexpanding putting tool it atthe required'amountof 'as desired. The ad'usting rod- 27 ing ofthe. rods 9 y and its attach-1 f The rods19 'which support the shell P P i in sections one with male sand the other with to a convenient location and is there pro-' vlded with ad usting-and clamping,means' indicated as the collar, and set screw 28 and the guiding collar secured tovthe ipe 9;

By moving this -ro reverse direction, the tool is contracted, and by holding same in position by means of the c sniping arrangement 28 it is held in any required position to produce whole of the. diameter desired.

27' downward,- e tool- -is expanded, and by moving the same in a One of my completed "foundations as shown in Fig. i iscomposed'of an inclosing cylindrical shell 18, the filling of concrete,

masonry, or other material within the same,

being indicated'.as-29 and the spread footmitting the scow.to be withdrawn thence, or

replaced as desired, the finished or partially finished work, v

The expanding cutting tool as shown-by full lines in Figs. cavatinga cylindrical hole ofdiameter to accommodate the shell 18, while the'dotted lines at the lower part of Fig. l-show an excavation of greater diameter with the cutter more expanded, for thepurpose of providing an enlarged footing.

Where the foundations are ma e under P water and in soil such that water would collect within the foundation, it will be unnecessary' to supply same by means of the tube 15, asin such cases, the water which natu-- rally flows into the opening will sufiice for loosening theearthy materials and aid in carrying them out apparatus. V a

Although I'have shown the suction aparatus as mounted on the scow or platform, -may lace a siphon, ejector or other suction' an p ping apparatus'withinthe cas- 1 at a lower eve in order to make a I deeper "foundation than suction alone will permit. Havin thus described my.-improve d apparatus, will now explain its operation in floated over the.

' to sink the foun tion, and is-secured in poshell18areplaced connection with a sco'w which is adalpted to float on the surface ofthe water, a though my apparatus may be mounted upon a platform or trestle on land or water, as des1 The 500W 1 con my apparatus. is

int w ere it-1s pro sition by means of the spuds or anchors 2 one or more lower sections of the cylindrica over the opening 32 n the scow and supported and ad usted therem by the suspending rods 19.. ese bottom sections are then owered by means of said rods, or the entirejplatform 6 may lowered by means of the fluid pressure cyhnders 3, and the plu ers 5, untilthe bottom sections ofthe sh rest upon the surface of e ground, This is continued unt1l suflicient sections of'the shell are in preliminary position, whereupon the cutting tool, mounted on the pi 'or hollow shaft 9, is lowered sh until it"reaches the earth. firsmtfplace the cutting tool in ace of the ground an I can however, position on the thezl eglace the shell qui The shell sections, may, 1 f necesbe surrounded by metal bands, wires,

' hollow casing made .in

without interfering with.

1 and 3 is adjusted for err-- by means of the suction a solid foundation.

equal to, or sliglttlzlly e sections around it, as re-.

or other binders, to more firmly secure them in position. The-sections of the shell or halves, may be cured together by means or wire 35, as shown in Fig. 6 The lower shell sections and the cutting tool now being their lower ends resting 1 on .the ground," the upper'end of the pipe'9' the flexible hose 13,

in position, with is connected by means of with the centrifugal pump apparatus 14:, and 1 or other suction water-1s then discharged,

terior of said sh l The expandin' tool is then revolved by means of e shaft 9 and its connections and as it turns the earth is loosened and washed up b the in-flowin stream of water and carrie away through the hollow pipe 9 and its connections 13. As the cutting tool is lowered it is partially-exanded by untilthe diameter of the cut is as shown m Figs. 1 and 3 being of size sufiicient to allow the shell 18 to descend therein. -This operation is continued as the cutting tool 21 ex cutting cavates earthy materials, while the said mixture'of water, earth,.'gr'avel, etc, is withdrawn through the hollow pipe 9, its connec-' of metal bands 34 means of the adjusting rod 27 The cutting tool as it is now revolving is lowered continu-"v ously as fast as it cuts; and additional sections of the cylindrical casing 18 are put on as required by the descent of required depth reached,

thecutting tool may then be dicated by the dotted lines in providing a'nenlarged footing. complished the cutting tool is contracted or folded up by means of the rod 27.and. its attaclunents, and is then withdrawn from the excavation. The opening of the excavation is then filled with-con maso or other material, as desired, there and, if desired,

andedas in- It is, of course, understood .thatl may continue the excavation of a diameter'abdut ater than the exter nal diameter 0 ell 18, hard material, is -reached.,.or, in case of excessive 'depthof soft material or for other reasons, tool at the bot-- I may expand the .cu mg tom thereof to provide an ing as shown, the amount of being to an extent thin the capacity of the tool, as

Although I have shown aratus in some detail,

footand described my I do not wish to LP. .be limited to the exact and specific detailts shown and described, but may use such stitutions, modifications or uivalents thereof, 'as are embraced withm e'scope of my ted out in the claims.

my invention, what invention, or as Having d i the previous sec-:- tion. ,Thxsoperatiopas .contmu'ed until the 1 thereby ailis'tein w this expansion is required, through the tube 15 into the in I claim and desire to secure by Letters Pat-- 1. In apparatus of thecharacter described, expansible cutting tool adjustably mounted on a hollow shaft, means! for revolving the same, and Suction or pumping devices connected with'said hollow shaft for receiving the excavated material therethrough. 10

' an expansible hollow casing. made in sections, means for holding and lowering the same, a hollow shaft rovided with an expansible cutting tool a aptedto operate within said casing, means for revolving said shaft, and

suction or pumping devices connected with thesame for removing the excavated mate rial therethrough. v

3. In apparatus of the character descr bed,

an ex ansible cutting tool of toggle construction, adjustably mountedon a hollow shaft, means for raising, lowering and re-, volving said shaft and the cutting tool carried thereby,-a flexible' hose 'or tube connected with said shdft'andprovid'ed with, suction or pumping appliances whereby the. excavated-material may be discharged therethrough. v t

4. In apparatus of the character described, cutting 'tool .adjustably mounted on a'hollow-shaft, means for raising, lowering and revolving the same, means an expansible cuttin raising, lowerin for supplying water to the excavation made ther.eb'y, and suctionor pum ing devices connected with said hollow sha t for removthe excavated material therethrough.

In apparatus of the character described, tool adjustably mounted on a hollow siaft, means for revolving the same, a rod connected with said hollow shaft and provided with means for and holding same, and

' suction or pumping devices connected with said hollow shaft for removing "the excam vated material therethrough. r

6. .Inapparatus of the character described, an expansible' cutting tool mounted on a, hollow shaft, means for raising, lo'wering and revolvingthe same and thecutting tool carried thereby, a swiveling coupling mounted at the upper end and connected with the interior of said shaft, and

, with a flexible 'hose or tube provided with suction or pumping apparatus, whereby the excavated material may be discharged therethrough. v,

7. An expansible cutting-tool comprising a hollow revoluble shaft, a pair of cutting bars pivotally'connected to the lower end thereof, a pair of upper members or links pivotally connected at the upper ends of said bars, the other ends of said links being pivoted on a sliding sleeve mounted on said shaft, said sleeve being prevented from turning by a groove therein and a corresponding adj ustably featheron said shaft, and means for contracting, expanding and revolving said tool as. desired.

8. Inapparatus of the character described, an expansible cutting tool adjustably mounted on a hollow shaft, means for raising, lowering and revolving said shaft and the cutting tool carried thereby, means for supplying water around said hollow shaft and within the excavation made by the said cutting tool, a flexible hose or tube connected with the-interior of said hollow shaft by a swiveling coupling provided with a stuiiing box 'or other means for maintainingtight connection and provided with suction or pumping apparatus, whereby the excavated material may be withdrawn therethrough.

9. In apparatusof the character described, an expansible cutting tool adjustably mounted on a hollow shaft, a gear wheel slidably mounted on said shaft, but adapted to rotate therewith, a gear pinion meshing with the aforesaid wheel and means for driving said pinion.

10. In apparatus of the character described, an expansible cutting tool adjustably mounted on a hollow shaft, a gear wheel slidably mounted ,on said shaft, but adapted to rotate therewith, a gear pinion meshing with the'aforesaid wheel, means for driving said pinion, and for raising, lower-v ing and adjustin said cutting tool. 7

11. An expansible cutting tool comprising a hollow revoluble shaft, a pair of cutting? bars pivotally connected at the-lower end thereof, a pair of upper members or links pivotally connected at the upper ends of said bars, the other ends of said links being pivoted on a sliding sleeve mounted on said shaft, said sleeve being prevented fromrturning by a groove thereln and a corresponding feather on said shaft, an adjusting rod connected with said sliding sleeve and extend-- ing externally along said shaft, said rod be ng provided with adjusting and clamping means mounted near the upper end of said shaft, whereby the cutting tool may be exg panded, contracted, or held as desired.

12. In apparatus of the character described, an expansible cutting tool mounted on a hollow shaft, said tool and shaft being adjustably supported from an overhead plat-form comprising hydraulic cylinders and plungers with cross beams mounted thereon, whereby said cutting tool and appurtenances may be raised, lowered .or held in position as desired.

13. An expansible cutting tool comprising a'hollow revoluble shaft, a pairof cutting bars pivotally connected at, the lower end thereof, a pair of upper members or links pivotally connected to the upper ends of said bars, the other ends of said links being pivoted on a slidablesleeve mounted on said excavated material may be discharged thereing by a groove therem-and a corresponding feather on said shaft, an adjusting rod connected with said slidable sleeve and extending externally along said shaft, said rod being provided witlradjusting and clamping means mounted near the upper end on said shaft, a flexible hose or tube connected with the interior of said shaft and provided with suction or pumping apparatus whereby the 5 through. 1d. An expansible cutting tool comprising a hollow revoluble shaft, a pair of cutting 15 bars pivotally connected at the lower end thereof, a pair of upper members or links pivot-ally connected to the upper ends of said bars, the-other ends of said links be ing pivoted on a slidable sleeve mounted on said shaft, said sleeve being prevented from turning by a groove therein and a corre sponding feather on said shaft,'an adjusting rod connected with said slidable sleeve and extending externally along said shaft, said 1 rod being provided with ad ustmg and clamping means mounted on and near .the

upper end of said shaft, means for suppl vmg water around said cutting tool, and a flexible hose or tube connected with the upper end of the interior of said shaft and provided with suction or pumping apparatus whereby the excavated material may be discharged thenethrough.

15. A foundation apparatus comprising a movable scow or platform provided with means for securing same in position, an adjustable. platform mounted thereon, to which is adjustably secured a hollow pipe or shaft carrying at its lower end an expansible cutting tool, means: for expanding and contracting said tool, and for lowering, raising and revolving the hollow shaft aforesaid, and a flexible hose or tube connected with the interior of said shaft and provided with suction or pumping apparatus whereby the excavated material may be discharged theret-hrough.

16. In apparatus of the character described, an expansible cutting tool of toggle construction adjustably mounted at the lower end of a hollow shaft, means for revolving said shaft, an adjustable platform carried by ascow or trestle adapted to sup port said shaft, said platform being carried by hydraulic cylinders and plungers provided with means for holding, raising and lowering the same, whereby the cutting tool may be operated as desired, the upper end of said hollow shaft being provided with a flexible hose or tube connected therewith and provided with suction or pumping apparatus," wherein the, excavated material may be discharged thercthrough.

17-. An apparatus of the character devices connected with said hollow shaft for removing the excavated material therethrough.

18. An apparatus of the character described comprising a platform or scow having an opening or notch on one side thereof,

said opening being free from obstruct-ions at its outer edges, an expansible' cutting tool of toggle construction adjustably mounted within said opening to operate therethrough, said cutting tool being carried on the lower end of a hollow shaft provided with means for raising, lowering and revolving same, and a tube or flexible hose connected with said shaft provided with suction or pumping devices whereby the excavated material may be discharged therethrough.

19. An apparatus of the character described comprising a platform or scow of approximately U-shaped form in plan, an expansible cutting tool adjustably mounted on a hollow shaft adapted to operate within the opening of said scow, means for raising, lowering and revolving said shaft and the cutting tool carried thereby, means for expanding and contracting said cutting tool and maintaining same at the desired diameter, and means for withdrawing the excavated material through said hollow shaft.

20. An apparatus of the character described, comprising a platform or scow surrounding three sides of an opening formed therein, the fourth side being free from obstructions, a hollow shaft adjustably mounted on said scow adapted to operate within the opening aforesaid and provided with an expansible cutting tool mounted on its lower end, means for raising, lowering and revolving said hollow shaft and the cutting tool carried thereby, means for expanding, contracting and securing the saidexpansible cutting tool to the size desired, means for withdrawing the excavated material through said hollow shaft, in combination with a hollow shell made in sections and adapted for lining the excavation made by said cutting tool, and means for holding and loweringsaid hollow shell.

21. An apparatus of the character described comprising a platform or scow having an opening or notch in one side thereof free from obstructions at its outer edge, means for anchoring said scow, a hollow shaft provided with an expansible cutting tool adaptedrto operate within the opening aforesaid, means for raising, lowering and revolving said hollow shaft and the cutting vide a linin or casing for the shaft ofthe 10' tool carried thereby, means forcontracting, excavation ormed by said cutting tool.

expanding and securing said expansible cut- In testimony whereof I hereto aflix my ting tool to the size desired, suction or signatpre in the presence of two Witnesses. 5 pumping devices connected with said hollow STEWART K SMITH shaft for removing 'the excavated material therethi'o igh, in combination with a hollow Witnesses: cylindrical shell made in sections, and means Emmi: SEAVEY, for holding and lowering the same to pr0- R.- A. BEERS.

, an error appears in the printed spec abent should be read with this correctio C. C. BILLINGS, Acting Commissioner of Patents.

It is hereby certified that in Letters Patent; No. 987, 66, granted March 2 i i i i 1911,11p0n the application of Stewart K. Smith, of Vintondale, Pennsylvania, fi 5 an improvement in Foundation Apparatus i fication requiring correction as follows: Page 6, line 80, the word edges shou] 5 read edge. and that the said Letters P- i therein that the same may conform to the record of the case in the Patent Ofliee.

Signed and sealed this 2d day of May, A. D., 1911.

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