US1387531A - Core-box - Google Patents

Description

S. B. AND 6.. C. DE VED- CORE BOX.

APPLICATION mm MAR. 11. 1921.

Patented Aug. 16,193.

- A TTORNEY.

UNITED STATES PATENT OFFICE.

SMITH B. DE VED AND GEORGE 0. DE VED, or BALTIMORE, MARYL GORE-BOX.

To all whom it may concern Be it known that we, SMITH B. DE VED and GEORGE C. DE VED, citizens of the United States of America, both residing in the city of Baltimore, State of Maryland, have invented certain new' and useful Improvements in Core-Boxes, of which the following is a specification.

A considerable element of expense in foundry practice relates to the production of cores from which the undercut or reen trant portions of the mold are formed and the principal element of core expense is time or labor. The present invention relates to core production and to the reduction of labor cost in making cores particularly the invention relates to a core box of an improved construction whereby the production of cores per man can be increased. The core box illustrated being adapted for use in connection with the production of window weights, the core thus produced being in the form of a plug adapted to close the top of the sand mold in which the weight is cast forming the eye which receives the cord and incidentally forming the entire top of the weight.

In the form illustrated the core box consists of two members pivoted to swing toward and from each other and to open and close in a tongwise manner. The two swinging members being shown in connection with a central member or) base to which they are pivoted, the holes or pockets being formed by registering cavities in the opposed members, the two cavities forming circular or cylindrical apertures when the tongwise swinging members are closed. There is also a central bar parallel to the axis about which the said tongwise members swing, which extends the entire length of the core box through each of the pockets centrally or diametrically forming the eyes in the respective plugs. To shape the core to form the top ends of the weights the central or base member is provided with upwardly projecting portions of suitable configuration spaced to correspond to the pockets so that one said upwardly projecting member closes and forms the bottom of each said pocket when the said swinging members are swung together in their tongwise relation bringing the corresponding semi circular cavities together to complete the formation of the said cylindrical pockets.

The upright members or projections forming the bottom of the core boxes or Specification of Letters Patent.

Application filed March 17, '1921.

Patented Aug. 16 (1921. Serial No. 453,096.

pockets are also used to support the number plates by whichthe number corresponding to the Weight ofthe sash is produced on the core and heads of the sash, the weight being of course determined by the length: of the casting and mold cavity. In the accompanying drawing I have illustrated a core box embodying my invention in the preferred form.

In the drawings :5 F gure 1 is a top plan. F1g. 2 is a side elevation .of the core box, a portion of the box being broken away to illustrate the interior of one core pocket or cavity. ,7 I

- 3 is an end elevation of the core box. Fig. 4 is a side elevation on the line 4, 4 of Fig. 2. =1 I Fig. 5 is a view of the core.

- Fig. 6 is a detail view illustrating a numfrom each other in J, a base or central circular cavities 4, 4, 4, 4 in one said member are in contact or closed, with corresponding semi circular cavities 5, 5, 5, 5 in the other said swinging member. forming cylindrical holes or pockets 6, 6, 6,6 in the closed core box, the axes of the cylindrical holes being substantially at right angles to the axes of the pivots 7 of said tongwise swinging members. The swinging members 2 and 3 are adapted to register when the said members also provided respectively with registering semi circular cavities 8 with their axes parallel to the pivots forming when the swinging members are closed alined apertures 9, 9, 9 connecting" the respective holes or pockets 6 and providing a continuous ing extending the full'length of the core box openadapted to receive the bar 10.,which, forms Y the eye or opening 11 in the finished core .(see loop oreye in the upper end of the finished igs. 5.and 6.) which in turn forms a sash weight. a

The base 1 in the form of the invention shown is provided at intervals corresponding in position and spacing to the pockets .6 with integral or fixed plugs 12.

The wallsfof each cavity at, 5 close tightly against each corresponding plug 12' and the plug serves to close the bottom of the corresponding pocket. An advantage of this arrangement is that the plugs as shown are adapted to form, 2'. e. to provide the molding surface to form the upper end of the core and may beconveniently shaped to draw from the core material. The plugs 12 are as shown formed with upwardly'projecting legs 13 and a central aperture 14, the legsbeing at their upper extremities in contact'with the bar 10' so that the legs13 and a central aperture 1 1; form the core grooves or c'oncavities 15 leading to the eye 11, the concavities 15'and the eye 11 being reproduced in the casting in 'the' form of tapering upright armsleading to a cross bar corresponding to the eye '11 in the core and to the rod 10 where it crosses the cavity providing a suitable'eye toreceive the "rope in the upper end of the weight, the cross bar being round and adapted for attachment to the window cord, the structure shown'iiiside the mold cavity to the left in Fig. 2 including the plug 12 and cross bar 10 insofar as they are inside the mold being substantially the structure which is reproduced atthe upper end of the weight." I

By examination of Figs. 1, 2 and 5' it will be noted that the upwardly disposed surface of the plug 12 between thelegs13,13'serves as a suitable support for the number plate 16 reproducing on the core the number indicating the weight of the casting which'numher is in turn reproduced (mere casting in a corresponding position which" may "be referredto as the botto-m'wall of the eye or loop correspondingto the opening. 1 1."

The'plates 16 are made movable and interchangeable'so that,'having' a set of plates with numbers corresponding to'the size and weight of the different sash weights to be made, the operator may produce'cores'for the various size weights marked accordingly by merely changing the number plates." the present instance the number pl a 'es are held by means of hooks 21 at each end, the hooks being engaged with corresponding notches 22 in pin-g 12 which forms the 'bottom of the core cavity,'the resiliency of the plateserving -to holdthehooks in position It will be understood that the number plates form corresponding 'mprints on the bottom surfaces" 23 of the cores which in turn form the surface 24, (see Fig; 7) -j'u'stbeneath the eye which is a convenient point for numbering theweightj The tong'wiseswinging. members 2, 3 of the corebox are hld in: closed and operative pd sit-ion by 'ineans' 'oi atransve'rse bolt "17 pivoted to swing in a transverse vertical plane lay-"means or a' lohgitudinal pin 18' in one swing-'nighaii of theatre boat, the bolt bein'g scu a. wi jii iii qp rativpesiudnte swing into a"ti"ans verse groove '19 inthe 'two' swinging members2, 3 and the same being tighten'ed to'hold said swinging member in closed position by means of a winged nut 20.

The operation of the core box will be apparent to those skilled in foundry practice. ihe swinging members 2, 3 are closed with the bar 10 seated in the apertures 9, 9 and extending across the pockets, the bolt 17 being placed in the transverse groove and the wing nut 20 tightened to hold the parts in position. The pocket or core spaces are then filled with a suitable core mixture whichis tamped and after the core has set, the nut 20 being slightly loosened, the bar 10 is withdrawn and the bolt 17 being swung free the two sides of the core box are opened by swinging outward about the pivots'releasing the cores. 7 i i The cores thus formed are intended to be used as plugs to close the ends of the mold spaces or pockets from which the weight patterns have been removed the cores serving to form the upper ends of the weights as aforesaid. Advantages of the structure are the convenience with which the pan-sci the core box are assembled for the core forming operation and opened to release the core, the swinging action being particularly advantageous in that it provides for the separation otthe halves of the core box to the best advantage with the least'percentage of loss in i the way of broken and imperfect cores.

1. A core box consisting of tongwise swinging members adapted to swing into and out of contact with each other and having core forming pockets comprisingcorresponding registering cavities in the respective swing ing members, said cavities opening in a plane parallel to the'axisot swing, an apertureerte'ndi ng through said boii'pai'allel t6 said axis and connecting the core forming peck etsj said aperture being formed by corresponding registering cavities in the, respective swinging members and a rod extending through said coreboi; and across each said core forming pocket being seated in said aperture. i i' ,2. A core box consisting of tongwise swinging members adapted'to swiiiginto'aiid out of contact with each other and having core forming pockets comprising correspoiidin registering cavities in'thei'espective swinging members said cavities opening in a plane parallel to the axis of swing and extending substantially at right 'angles to said artisan aperture extending through said box par allel to said axisand connecting the core tending through said core boii and across each said core forming pocl'qt',' bei"ngseated in said aperture iaiid "a base to": which said tong'wise swinging members are pivoted, the

base being provided with plugs spaced and positioned to correspond with the respective pockets, each of said plugs having a portion spaced awayfrom said rod forming an eye or opening adjacent the rod whereby the core is shaped to product an eye in the casting.

3. A multiple core box, side members pivotally mounted to swing tongwise toward and from each other, into and out of mutual contact, and having registering concavities, in the respective members, core pockets formed of said registering concavities, a rod extending diametrically across said pockets, the swinging members having concavities in their meeting Surfaces providing apertures to receive said rod and a plug in the bottom or end of each pocket, the plugs being shaped with an eye or opening, one side of which is closed by said rod so that the core reversely formed is adapted to produce a casting having an eye corresponding to the aforesaid eye or opening.

4:. A core box consisting of a base, two members pivotally mounted on said base to swing tongwise into and out of contact with each other, the swinging members having registering concavities producing a core forming pocket when the swinging members are closed, a plug in the bottom of the pocket, a rod extending across said pocket parallel to the axis of swing, the meeting faces of the swinging members being provided with concavities adapted to register and provide a seat for said rod whereby it is held when the swinging members are closed and released when they are'open, the plug being formed to provide an eye or space between the rod and the plug, the same being adapted to produce a loop and eye in the core and in turn to produce in the casting an eye corresponding to the eye in the core box.

5. A core box having laterally movable side members and a bottom member with a removable and detachable number, having fastening means cooperating with said side members and bottom memberv to hold the number in position.

6. A core box adapted to form sash weight cores, the core box having a bottom portion forming the bottom surface of the core plug corresponding to the bottom surface of the eye in the sash weight laterally movable side members and a removable and interchangeable number having means for attaching it to the said bottom surface of the core box.

7. A core box having movable side members registering concavities in said members forming a core pocket, legs extending into the pocket, the legs being spaced apart; a rod extending diametrically across the pocket in contact with the extremity of each of said legs and a removable number plate between the legs and opposite the rod.

8. A core box having movable side members registering concavities in said members forming a core pocket, a plug in one end of said pocket having legs spaced apart to form a notch or opening between the legs, said legs extending into the pocket, a rod extending across the pocket in contact with each of said legs near the extremities thereof, a number plate on the plug between the legs and means for removably attaching the same in said position.

9. A core box consisting of tongwise swinging members having corresponding registering concavities in the swinging members and an aperture extending through said box parallel to the axis of swing, upright legs in said pockets spaced apart, a rod extending through the core box in the last mentioned aperture and engaging the extremities of the legs and a number plate between the bases of the legs, the number plate being held by one of said swinging members when in closed position. i

10. A core box consisting of a base, two members pivotally mounted on said base to swing about parallel spaced axes on said base, the swinging members having registering concavities forming a core pocket when they are closed, upright legs on said base spaced apart and projecting into the pocket, the box havinga longitudinal aperture formed part in one swinging member and part in the other, the same being parallel to the axis, a rod in said aperture extending transversely to the pocket and engaging the extremities of the legs, the number plate resting between the legs opposite the rod and means for removably securing the same. I

11. A core box consisting of tongwise swinging members having corresponding registering concavities in the swinging members and an aperture extending through said box parallel to theaxis of swing, upright legs in said pockets spaced apart, a rod extending through the core box in the last mentioned aperture and engaging the extremities of the legs and a number plate between the bases of the legs, a number plate resting between the legs opposite the rod and means for removably securing the same, consisting of projecting portions of the plate extending between the base and the swinging members, which latter hold the number plate in position by pressing said. projections against the base portion when the swinging members are closed.

Signed at Baltimore, Maryland, this 5th day of March, 1921.

SMITH B. DE VED. GEORGEC. DE VED.

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