US1727278A

US1727278A - Method of casting sash weights

Info

Publication number: US1727278A
Authority: US
Publication date: 1929-09-03
Anticipated expiration: 1946-09-03

Description

Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

METHOD OF CASTING SASH WEIGHTS.

This invention relates to the production and manufacture of sash weights of the type employed in the counter balancing of window sashes and the like, and has for its pri- .mary object the provision of a method and means by which a sash weight of improved construction is produced together with the obtaining of economy and convenience in the process of molding the weights.

0 Another object of the invention resides in producing a sash weight wherein the head portion of the weight is provided with a vertically extending cord receiving slot, and wherein the walls of said slot are united by means of a transversely extending web or bar, the latter serving to provide an anchor or connecting means for securing the weight.

to the sash cord, said web or bar being of materially less diameter than the width of the slot in order that the walls of the slotwill provide protection for the lower ends of the securing cord by preventing the latter from coming into contact with adjacent objects or wallswhen the sash is in operation.

The invention possesses other objects and advantages which will. be in part obvious and in part pointed out hereinafter in the following description, and for a morecomplete understanding of the invention reference is to be had to the description and the accompanying drawings; wherein:

Figure 1 is a view of the initial step employed in producing the sash weight and dis closes the step of producing vertical pockets in the sand of the drag section of a mold,

Figure 2 is a similar view disclosing the step of rounding the bottom portions of the pocket,

Figure 3 is a vertical sectional view disclosing the step of producing the head pockets in the cope section of the mold,

Figure 4 is a similar view disclosing the dragand cope sections in assembled relationship with the pockets in position to receive the molten metal,

Figure 5 is a transverse cross-sectional view taken on the line 55 of Figure 3,

Figure 6 is a similar view on the line 6-6 of Figure 4:, t

Figure 7 is a bottom plan view of the mold board employed in the step shown in Figure 1,

Figure 8 is a plan View of the drag sec- Application filed January 14, 1928. Serial No. 246,865.

tion of the mold with the molding board,

Figure 12 is a perspective view of a com-,

pleted sash weight formed in accordance with the present invention,

Figure 13 is an enlarged section on the line 13-43 of Figure 12.

Referring more particularly to the drawings the numeral 1 designates the drag section of a mold which when viewed in plan may be of the form disclosed in Figure 8. This'drag section is adapted to contain the usual body of wet or moist molding sand as indicated at 2. In carrying out the invention, after'the drag section has been filled with the body of sand 2, there is placed upon the upper edges of the drag section a mold ing board 3. This board, as shown in Figures 1 and 7, contains a plurality of i'ela tively spaced openings 4, and the under surface of the board is provided with a longitudinally extending rib 5 and with communicating transversely extending ribs 6. These ribs extend adjacent to the openings 4: and are adapted to produce runner grooves 7 in the body of sand 2, as shown in Figure 8, into which molten metal may be poured from a single gate to permit of the substantially simultaneous filling of a plurality of vertical mold pockets 8 formed in the sand body 2.

These pockets are produced, as shown in Figure 1, by means of a tubular insert 9. This insert comprises a hollow body terminating at its upper end in a handle 10, the walls of the body being slotted as at 11. The body carries an adjustable collar 12, and in practice the insert is forced through the opening 4E in the board 3 and penetrates the body of sand 2, filling the interior of the insert with the sand. The insert is then removed drawing the sand contained therein from the drag section of the mold and producing the vertical pockets 8, which are disposed immediately adjacentto the runner grooves 7. The next step, as shown in Figure 2, consists in inserting a second insert 13. This insert, however, is provided with a closed lower end which is rounded as at 14 and by this step the bottom of each of the pockets 8 are rounded to produce a corresponding configuration in the completed sash weight, as shown in Figure 12.

Following the rounding of the bottoms of the vertical pockets 8, the mold board 3 is removed and is replaced by a second board 15. This board is likewise provided with openings 16 corresponding in size and position to the openings 1. Adapted to be carried by the board 15 and frictionally fitted in the openings 16 thereof are upstanding pocket for-min members 17 which are of the form illn .rated in detail in Figure 11. Generally, each of the members 17 comprises a cylindrical body rounded at its upper end and provided with a verti ally extending centrally disposed slot 18, the bottom of the slot being provided with a transversely 6X- tend-ing cross rib 19.

Arranged to be received within the slot 18 of the pocket members 17 are lOZIlZGCl sand or clay cores 20 which possess the construction shown in Figure 10. Each of the cores comprises a substantially wedge shaped body, wider alon its upper edge portion than its lower edge portion, the lower portion of each. of the cores being provided with a recess 21 and above the recess there is formed a transversely extending opening 22.

In practice, the second mold board 15. is placed on the top of the drag section 1 and then supported upon the board 15 is the cope section 23 of the mold. The sand cores 20 are then placed in the vertical slots of the pocket forming members 17, as illustrated in Figures 3 and 5, atlter which the cope section is packed with sand in the usual manner. Preferably, the board 15 is provided with spaced upstanding pins 2% which produce openings in the body of sand 25 disposed in the cope section to permit of the pourof molten metal into the pockets or cavities of the mold. VJhen the sand body 25 has properly set the board 10 is removed, as indicated in Figure 4:. This withdraws the members 17 from the sand 25 leaving therein head pockets 26, which register with the pockets 8, as indicated in Figures 4 and 6. The cores 20 remain, of course, in the sand body 25 and are supported therein, following the removal of the board 15, by reason of the wedge shaped formation on the part thereof.

The mold is then poured with molten metal by introducing the latter into one of the openings formed 'by the pins 24, and the metal follows the runner passages 7 and fills practically simultaneously all of the

pockets

8 and 26 thus formed in the mold. This re sults in the formation in each of said registering pockets of a completed sash weight A, illustrated in Fgure 12. It will be observed that the weight A includes a rounded cylindrical body 2'? having a rounded lower end 28 and a more or less rounded upper end or head end 29. Due to the presence of the sand core 20, there is formed in the head end of each of the weights a vertically extending slot 30 which is adapted for the reception of an ciated sash cord (not shown). The slot 30 is provided with smooth side walls which are united by means of a transversely extending web or bar 31, the latter being produced by the opening 22 provided transversely in each of the cores. It will be observed that the web 31 is of materially less diameter than the width of the slot 30, this provides for the protection of the cable and prevents the same from being subjected to undue wear and friction when a weight suspended therefrom. The recess 21 provided in each core is of slightly smaller length or width than the diameter of "he completed weight. The recess produces an inwardly arranged web 32 in the bottom of each of the slots 30 with the up per wall of the web 32 spaced from the cross rod or bar 31. Ordinarily, one of the side walls of the core or recess 21 is provided with a numeral which, in turn, is molded into one or more of the side walls of the web 32, as indicated at 33, for the purpose of identifying the size or number of the completed weight.

From the foregoing it will be seen that the present invention provides a simple, economical and convenient method of effecting the production of an improved form of sash weight, admitting of the production of the later in large quantities and ordinarily with unskilled labor.' WVhile we have described specifically one of the preferred methods of carrying out the invention, never-the-less it will be understood that we do not limit ourselves precisely to the exact detail steps set forth, but reserve the right to vary the process or construction in accordance with the spirit and intentof the invention as the latter has been defined in the followingclaims.

hat is claimed is:

1. A method of producing sash weights, which consists in forming a plurality of spaced vertically extending pockets in the sand of the drag section of a mold together with runner passages for uniting said pockets to permit of the flow of molten metal into each pocket from a single gate, then rounding the bottom of each of said pockets, placing in the cope section of the mold a plurality of head pocket forming members each of which being provided with a vertically extending slot open at its upper end, placing a core within the slot of each of said pocket forming members and forming the core to include a transverse opening and a transverse recess, then filling the cope section with sand, removing the pocket forming members from said cope section, then registering the pockets of the drag and cope sections and filling the same completely with molten metal, and in allowing the latter to pass around said core so that the latter will produce a vertical cord receiving slot in the head of each complete weight, the opening and recess in said core producing vertically spaced transversely extending webs in each of said slots and wherein said webs are of less width than said slots.

2. The method of producing cast weights, which consists in the steps of producing a vertical pocket in the sand of the drag section of a mold, then placing in the cope section of the mold a head pocket forming member provided with a vertically extending slot therein, placing a transversely apertured core vertically within the slot of said pocket forming member and filling the cope section with sand, Withdrawing the head pocket forming member from said mold, and in filling the pocket with molten metal with the core in its applied position, whereby the presence of the core produces in the head of the completed weight a vertical cord receiving slot having formed with a vertically extending slot, ar-

ranging within the slot of said head pocket producing member a transversely extending core having a spaced centrally disposed aperture and recess, filling the cope section with sand, removing the head pocket producing member, and then pouring the mold so that the molten metal will completely fill said pocket and surround said core, the latter serving to produce in the completed weight a vertically extending slot provided with spaced transversely extending cross-webs of a width less than the width of said slot.

In testimony whereof we affix our signatures.

EUGENE EAGLESTON. JAMES M. EAGLESTON.