US1686001A - Pattern for bathtubs - Google Patents

Description

Oct. 2, 1928. 1,686,001

H. E. HENRICKS PATTERN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-Sheet l v INVENT R.

LM A4 BY ATTORNEYS.

H. E. HENRICKS PATTERN FOR BA'I'HTUBS Oct. 2, 192 8.

Filed Sept. 30, 1925 5 Sheets-Sheet 5 a W/MWM j ATTORNEYS INVEN TOR. I ALMA/W04.

Oct. 2, 1928.

H. E. HENRECKS PATTEBN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-$heet 1 3 INVENTO BY M A ATTORNEYS.

Get. 2, 1928.

H. E. HENRlCKS PATTERN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-Sheet 4 INVENTOR.

J ATTORNEYS.

Oct. 2, 1928.

H. E. HENRICKS PATTERN FOR BATHTUBS Filed Sept. $0, 1925 5 Sheets-Sheet 5 .M W fl ATTORNEYS Patented Oct. 2.192s.

inseam T D STATES PAT NT orrtcar HENRY E. HENRICKS, F BEAVER, PENNSYLVANIA, AssIGNort 5120 THE 'UNITEDSTATES SANITARY MANUFACTURING COMPANY, OF rIrTsBuRcH,.PENNsYLv I A 002a PORATION OF PENNSYLVANIA.

PATTERN FOR BATHTUBS.

Application filed september 30 1925. Serial No. 59,530.

' This invention relates to bath tubs, and is particularly directed toward pattern .for what is knownas a single shield type of tub. One object of my invention is to'providea 5 pattern for a bath tub such that a shield is provided on the finished bath tub that is coplanar with a tub wall. 1

Another'object of my invention is to provide a pattern for bathtubs such that a shield is formed co-planar-with a tub wall in green sand mold. A further object of myinvention is to provide a pattern for a bath tub having attach ing shields on at least one wall in which the shield portions of the pattern are separable from and'movable independently of the main body of the pattern.

In the single shield typ ne tub Wall of a builtin tub is exposed toview and connection with the building wall is made by a shield portion integral with the tub. Heretofore these shield portions have been soplaced as to project from an end wall of the tub, thus'eX- posing not only a'side wall but also the tub' corner, and provide an irregular and rather unsightly contour. type have beenmolded integral with the tub by providing shieldportions which might be withdrawn into the tub pattern proper before stripping the cope portion of the flask from the pattern. It will be understood of course that in a commercial manufacture of bath tubs the molding is done by means of matched patterns, the cope and the drag being made up separately and brought together on a casting floor. Generally speaking, all I bath tubs are cast upside down so that the w outside contour of the tub is formed in the cope portion of the mold;

Another form of shield which has been used is formed by extending the tub wall to the'floor by means of a dry sand'core, which a is put in place after the copehas been rammed and the pattern withdrawn. This style of shield is also rather unsightly because in order to get metal of sufliciently uniform thickness top-revent cracking of the castings I and also-to eliminate defective castings by reason of loose san'd, it has been necessary to set the shield back a short distance from the planeof the exposed tub wall so' that there is afvery definite? break between the tub wall and the shield proper,

Shields of the above By the use of my pattern I provide a'bath tub having a substantially plane shield extending the length of the tub,-'a portioniof such shie'ldforming one wall'of the tub proper; Stated ini another way, the side wall is extended beyond the body ofth-e tub proper so as toprovide a shield, this extension being substantially fro-planar with the tub wall.

The invention may be embodied in a tub of the recesstype, that is, a tub extending from one wall to anotherand completely filling the space between, or to a corner tub which fits n one corner of the room and has one shield on aside ofthe tub and'another'on the endthereof. 7

A pattern for making the above described bath tub, comprises a tub wall molding portion and a separate shield molding portion,

the shield molding portion being adapted for movement relative to the tub pattern? to a point substantially out-side the mold. This shield'molding portion is moved at a suitable inclination to. provide draft and permit. a

clean withdrawal of the shield molding por tion from the mold after which the entire mold maybe stripped from the main body of the pattern vwithout injury. .ItisPossible with this pattern toform theentire mold in green sand and to do away entirely with cores.

The flask is of course stripped from the pattern in a vertical direction and in a com-- mercial foundry: is handled by overhead cranes. Stripping pins are provided for lifting the flask a distance of about-four inches so asto insure a clean removal of the flask from the" pattern before it is picked up by the crane. These pins 'move the flask vertically and for a shield whichterminat'es in a vertical line there is no draft whatever in the pattern.

The tub walls usually slope toward one It is therefore necessary to impart to the shield molding portionof thepattern a component of movementtoward the another at the bottom of thetub and this a means that the shield will be a plane whlch is inclined to the vertical.

necessary to provide draft on the tub walls Since the cope and the draga're formed separately it is not 7 proper but draft is provided on the Shield I sary to withdraw sitionvin the mold during rammingu than portion or portions. Since the exposed face of theshield is co-planar with the outer face of the tub wall the draft is provided on the itdoes when the drag is matched with its correspondin cope. Supposing, for exam- '20 pic, that a tu wall is designed to present an angle of 7 to the Vertical, it is desirable to tilt theentire pattern about 1 's It has been found in actual'practice that this tilting ofthe tub body materially simplifies the moldingoperation and makes more certain the production of sharp clean corners on the casting.

I ,In order to. secure the above described movementsof the shield molding portion I provide fluid operated cylinders under the control of the molder and suitably connected to the shield molding portions for withdrawing them from the flask at the desired time. Fluid operated cylinders provide a smooth I and soft action which is exceedingly- ,de-

sirable in an operation of this character.

Preferably the stripping pins above mentioned are also operat'edby a fluid cylinder.

the control system for the cylinders means is' provided for'actuating the several cylinders in sequence so that it is impossible to stripthe flask from the pattern before the shield .-molding portions have been withdrawn. i

In the accompanying drawings which illustrate a preferred embodiment of the invention:

"Figure 1 is-a side elevation of a bathtub made according tomy invention; 7 I

-:.Figure 2- is a horizontal section through the tub on the line II'-II of Figure 1;

Figure 3 is an end view of the tub; v i Figure 4 is a top plan view partly broken may, of a 'pattern forimolding the tub shown inFigures 1 to 3and showing one of the shield molding portions in place;

Figure 5 is a side view of the pattern shown Figure 4,but with both the shield molding portions removed;

' Figure 6 is a vertical section through a molding .machine embodying the pattern shown in Figures 4 and 5;

Figure 7 is a vertical section on the line I VII-VII of Figure 6, but showing a portion of the pattern broken away; 7

Figure 8 is a top plan view partly broken away, of the molding machine shown in Figures 6 and 7 i In the illustrated embodiment of the invention there is shown a tub body of the re cess type comprising end walls 2 and a side wall 3. This wall is connected to theend walls 2 by curved corner portions 4. The

side wall 3 has shield portions 5 extending beyond the corner portions 4 and end walls 2 so as to provide a substantially plane surface which, when the tub is in place, will conceal the outer surfaces of the end walls Q'and corner portions 4 as shown in Figure 1. The 1 entire wall extends downwardly to thebottom of the feet 6 on the tub, as shown in Figure 3. The usual roll rim 7 extends beyond the wall or shield as is common in tubs of this character. r

In accordance with usual 'commerc al practice, the tub is cast upside down and the cope andthe drag are molded apart from one another by matched patterns as is well known inthis art. It will be noted that the shield portionsfi'are cast entirely in the cope as is the shield portion which extends below the tubbottom, which portion is indicated in the drawings by the reference characterS. It is necessary to provide draft for these shield portions and this is provided on the back face of the shield as shown at 9 in Figure 3.

It will be further noted that the-wall?) is at an angle to a vertical line ov. As heretofore described, the shield portion is' cast by providing a corresponding portion on the pattern whichis removed from. the .cope

loo

prior to stripping the same from'the pattern proper to a point outside the pattern. It will be clear from Figure 3 that. 'it'is necessary to withdraw this loose piece-at an angle to the vertical. I l

It will also be appreciated that the end wall 5 of the shield portions 5, being necessarily vertical by reason of the design of the tub, does not permit the allowance of draft on this portion ofthe pattern andtherefore the shield molding portionmust be moved inwardly towardthe body of the tub in a direction lengthwise of thetub in the example shown. Of course if a corner type tub were being molded, it would be necessary to withdraw the end shield crosswise of the tubas well as inwardly inthe other plane. 1

The pattern for forming the cope half of the mold is shownin Figures 4 and 5. It will be noted that it comprises a body portionzindicated generally by the reference character B and movable shield portions one of which is shown in Figure 4 and indicated generally by the reference character S. The body portion is hollow and accommodatescertain of the operating mechanism hereinafter de-v provided for the shield portion S. The shield portion is fitted in place and a plate '11 is fitted thereto to hold it properly in the guides. As shown in Figure 5, these guides'are sloped so that the 'shield po'rtions are withdrawn at an angle from the vertical edge 5 in a direction: parallel to the major axis of the cope and permit a clean withdrawal. 7

Referring now to Figure 6 it will be seen that the shield portions 8' are mounted on slidable posts 12 provided withguides13 molded cope from the patternnear the bottom and-also provided with operat'ing racks 14. The racks l l are engaged by pinions 15 mounted on a pair of cross shafts molding machine. 'Keyed to the shafts 16fare pinions 17 which are engaged .by racks 18 secured to a slide 19. The slide 19 is mounted "in guides 20 secured to the frame of the molding machineand carries apair of fluid actuated cylinders 21. The cylinders are double acting and are provided with pistons secured to piston rods 22 which are in turn fastened to-the frame of the machine as indicated at 23. When actuat- 16 which are journaledin the frame of the ing fluid, preferably air, is admitted to theseeylinders the slide 19 is causedto move and theshield portions S are moved to theupper position indicated in Figure 6 or are moved downwardly to a point substantially outside the mold so- 'asto permit withdrawal of the Adjusting screws 24 are placed in the head of each of the cylinders 21 and these are'used toregulate the upper and lower positions of the shield portions S. I V

entire pattern slightly EIIICl'thlS is clearly shown in Figure 7 of the drawings? It will 7 also be noted from that View that the posts 12*are so mounted that they move at an angle to the vertical as viewed in Figure. .7 so as to secure'a clean withdrawalfrom the sand not only of. the front face 5? of the shield i portion, but also of the rear face 5thereof.

Ai"ter the flask has been rammed up and the shield portions S withdrawn, the flask is ready for stripping from the main body, of

V the pattern; This stripping is accomplished by pins 25 which are mounted for Vertical movement in the frame of themolding mas chine. The pins are provided with rack, teeth 26 engagingpinions 27,-mountedon cross I shafts 28. These cross shafts carry pin-ions 29 at their central portions and the pinions 29 are engaged by racks "30' mounted on a slide 31. ,The'slide 31 carries a fluid cylinder 32. The cylinder is double acting and its piston rod 33 is secured to a cross piece 34. It will be seen that admission of fluid to one end or the other of the cylinder 32 will: cause the slide 31 to move to the right or the left and cause the pins 25 to move up or: down. 4 It will be noted that the cylinder 32 and the associated mechanism are within the body they" will occupy tance of aboutfou r inches.

portion of the pattern. Thisfisno-t only a,

convenientdisposition of these parts, but. the cross piece '34: also serv'es asa brace? for the front wall ofthe tub pattern, which wall is left unsupported at its ends by reason of the cuttingoutof the; corner-to provide forthe shield forming pieces s from the-flask, this end the control mechanism for actuating the cylinders is provided with means for con}- trolling the operation of the cylinders in a definite sequence.

The cylinders are shown in Figures 7and 8 as being in-the position when a mold has been pins 25*is rammed upbefore the shield forming por tions havebeen withdrawn; When air is ad mitted to the-left hand end of" the cylinders 21 as-viewed in the dr'awings, the cylinders and the slides to which theyare attached move to'the left, thus rotating'the shafts: 16

counterclockwise and causing the withdrawal of the shield portions Sfrom the mold.

. Attached to one of the cylinders21 is an arm 41 for, cooperation with a control systern which comprises rod 42 ofv operating fingers 43 and43? thereon after' the-movement of-the cylinders 21. y w As above stated, it is desirable to tilt the Continuingl with the operation of thematchino; the cylinders 21 move to the left'until having a pair.

It)" I air is admitted to the right hand 'en-dof-the' cylinder 32 as viewed inthedrawings. This causes the cylinder and the slide-on which it is mounted to. move to the right, thus rotating J the shafts 28 in 'aclockwise direction and raising-thestripping' pins 25.T-:'-T:l18SB stripping. pins engagethe walls of the flask and lift it vertically: from the' pattern'for 'a-disin this raised position until bythe crane and taken awa The completed cope hal-tz'of the maid being now withdrawn from'th'e machine; it'i's'fiecess'arylto' return the parts to: their; original position for molding the nextltub p This is done by admitting'air to the ri'ghthandends of the cylinders 21. and causing them tomove tothe right. Thismovcn'ientfis:effectivefor rotatin'g the shafts 16 me clockwise dime-- tion and raising theshield-portions S to the position showmin Figure 6i-o'f the drawings. Air is admitted to the left hand end ofth'e' cylinder 32', thus causing the cylinder tomove to the left and lower the strippingipins 25.

The cooderatin fluid svstem is desi ned-so C u. b

thatit is impossible to puta flaski'npo'sition tor molding until the stripping pinshave been lowedcand thismeans that no sand willbe patt -inside the flask until the shield forming ortions are "in their upper position. This 18 of decided advantage since with an apparatus, oi this character wherein the shield portions are withdrawn from the confines; of

I the flask during a molding operation there is necessaril left at some stage an opening throught e pattern to the operating mechanism I iQH are. in upper pos1tion,,-they close off this opening entirely and prevent any'sand from. falling into themachme proper; With the sequential operation ofthe cylinders as above described, there is ,never'any danger ofi'eworkman getting sand into the operating -;.-If desired, zone-or both of parts, ofthe molding machine. 1 each pair of shafts 16 and28 may be extended to accommodate thud lever for a manual: operation of @Ihave described a preferred embodiment of my invention as applied toa tub of the recess type. In a tub of this 'ty the exposed wall" a side wall and thee ield isan extension thereof. .It will be understood that in stub of the corner type an end wall be-? comes an exposed wall and one shield is an extension of thisend wall. Where the terms fside wall and-end wall are used herein,

they are meant to include an end wall which im-expO'sedto view as will be apparent. In either case theexposed .wall is inclined so that the junction of the unexposed wall with the exposed wall is a non-vertical line, while the shield extends: beyond the same and terminates in a vertical line which is joined in theiiwall of the-room. It will be further understood that while I'have shown butone embodiment of the invention, it is not thus limited since it may be otherwise embodied within the scope of the following claims.

Iclainr: V :1. A pattern for a bath tub having a shield rtion which is an extension of a tub wall, L Including atub body portion and ashield portion, co-planar with a wall of the body por- 1 tion, vthe shield portion beingrelatively movable withrespectto the'body' portion to a substantially outside the mold tion formed by th tt rA pattern for a-bath tub having a shield portion which is an extension of a tub wall, ineluding'atub body portion and a shield portion, the shield portion-being relativelymovable with respect to the body portion to a position substantially outside the mold portiiin formed by the pattern, the direction of movement of such portionbeing in part inportion;which wardly of the pattern.

for a bath tub having a shield is an extension ofa tub wall, including a tub body portion and a shield por- 3. Azpattem tion, the shield portion being relatively movahlewithrespect'to the body portion, and

below. When the shield formingpor "body portion,

means for imparting to the shield portion a component of movement inwardly from its operative. position so as to providesuitable bath tub having a shield portionwhich is annextens'ion of a tub wall,

including a tub body portion'anda shield portion,:the outer face ofthe shield portion infa closed position being substantially flush with thelouter face'of a tub wall. onfthetubsboidy, portion, and guides in the tub: body portion- 'forsuch shield portion.

.- 6. A: pattern for a bath tub having a shield portion which is anextension of a tub wall, including atub'body portion and a shield portion, the outerfaceofthe shield portion in avelosed position being substantially flush with the outer face of a tub wall on the-tub the shield portion being relatively movable with respect to the body -p or tion. and means formed on the engaging faces of the bodyuand shield portion for causing the face of theashieldportion which'is flush withxthe tub wall to retreat therefrom on movement of the shieldportionrelative to the a tub body portion.

7 A patternior a'bath tubhaving shield 1 including a tub body portion and a shield por tion, the shield portion being relativelylmov able with-respect to the body to a position substantially outside the mold a. portion formed from the pattern, and means for producing. pattern draft on the shield-portion.

r 8. A pattern'for a bath tub having a tub wall-inclined to the direction of stripping of the mold and a shield portion similarly' inclined, including a tub "wall molding portion and av relatively movable shield 'molding portion, the shield'niolding portion 'j-b'eing adapted forimovement "to a point-substam.

tially outside the mold, such movement b'e-' stripping.- 1 i 7. x 9. A pattern for a bathtub having a tub along a line inclined to the direction of wall inclined to the direction of stripping of the mol'd and a shieldportion similarly in} clined ,'includinga tub'wall molding: portion and-a relatively movable shield molding por-' tion, the shield molding portion being adapted for movement to a point substantially outside the mold, such movement beingzalong a line inclined to the direction ofstripping, and also inclined to the inelin'ationof. the

side wallto providedraft for the shield mold 'ing portion.- v 1 "10. A pattern for a bath tub'having a tub wall and an extension thereof forming a shield withan'ex'posed face substantially co-v planar with the exposed face of the tub wall,

including a shield molding portion having aback face which is inclined relative to the exposed face to provide pattern draft for the shield molding portion, and means for withdrawing the shield molding portion from the flask in a plane intermediate the front and rear faces thereof. 7

11. A pattern for a bath tub having a tub wall inclined to the direction of stripping of the mold and a shield portion similarly inclined, including a tub wall molding portion and a separate shield molding portion, the shield molding portion being adapted for movement relative to point substantially outside the mold, such movement being along a line inclined to the direction of stripping and also slight-1y inclined to the inclination of said side wall to provide draft for the front face of the shield molding portion, the shield molding portion having a rear face which is inclined to the front face of a greater amount than the inclination of theline of movement of the shield molding portion to the front face, whereby draft for the rear face of the shield molding portion is also provided.

12. A pattern for a bath tub having a nonvertical tubwall and a substantially coplanar shield portion, including a tub body'portion which is inclined to reduce the angle which said tub wall would normally make withfthe direction of stripping, and a separate shield molding port-ion, the shield molding portion being adapted for movement to a point substantially outside the mold.

13. A pattern fora bath tub having a tub wall inclined to. the direction of stripping of a the mold and a shield portion similarly inclined; said shield portion further having a vertical end wall, including, a tub wall molding portion, and a separate shield molding portion, the shield molding portion being adapted for movement relative to the tub pattern to a point substantially outside the mold,

' such movement being alongthe' line slightly inclined to the inclination of the side wall to. provide draft for. the shield molding por- 7 tion, and also being inclined toward the tub wall proper to providedraft for the vertical end wall. 7 '14. A pattern for a bathtub having a body portion for defininga tub wall,

I movable shield portion constitutingsubstantially an extension of thetub wall when in its molding position, and means for bod support for the shield portion havinglongt.

the, tub pattern'to a movement for moving the g portion, the outer face for suchshield I V the shield "portion in said guides, whereby a relatively moving the I shield portion inwardly of the body portion if I and substantiallyin the plane of the wall,

longitudinally movable support for the shield.

15. A pattern for a bath tub having a shield portion which is an extension of a tub wall, in-

cluding a tub body portion and a. tapered shield portionfthe outer face of the shield portion in a closed ly flush with the outer face of the tub wall on t-he'tub body portion, guides in the tub y portion for such shield portion, and a tudinal and lateral shield portion in said guides. 4 16. A pattern for a bathtub having a shiel' portion which is an extension of a tub wall,

including a tub body portion and a. shield of the shield portion ina closed position being substantially flush with the outer face of a tub wall on the tub i bodyportion, guides in the tub body portion for such shield portion, and means for moving the shield portion in said guides.

17. A pattern for a bath tub having a shield portion which is an shield portion, the upper portion of the shield being of a smaller dimension than the lower portion, the outer face of the shield portion in a closed position being-substantially flush with the outer face of a tub wallon the tub body portion, guides in the tubbody portion portion, and means for moving the upward movement of the shield portion in said guides moves the shield portion outwardly in the plane of the tubwall.

18. A pattern for a bath tub having 'a-shield' portion which is an extension of'atubcwall, including a tub body portion and a tapered shield portion, the upper portion of the shield being of va smaller dimension than the lower portion, the outer faceoflthe, shield portion in ac-losed position beng'substantially flush with "the outer face of a tub wall on'th'e tub body portion, guides in the tub body portion for such shield portion, and means for moving the shield portion in said guides, wherebythe' downward movement ofthe shield "portion in said 'g'uidesmoves the shieldportioninwardly in the plane of the tub wall.

In testimony whereof I have hereunto set my'hand. i

position'being substantialextension of a tubwall, including a tub body portion and a'ta-pered HENRY E. HnNRIoKs.

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