US1956161A - Method and mold for making globes - Google Patents

Description

3 vSheets-Sheet l J. C. SMITH METHOD AND MOLD FOR MAKING GLOBES April 24, 1934.

A ril 24, 1934. J. c. SMITH METHOD AND MOLD FOR MAKING GLOBES Original Filed July 27. 1929 a 3 Sheets-Sheet 2 llanluununl 15/272 afmzifi April 24, 1934. I J c $M|TH 1,956,161

METHOD AND HOLD FOR MAKING GLOBE 5 Original Filed July 27,1929 :5 sheets-sheet 5 Patented Apr. 24, 1934 UNITED STATES PATENT OFFICE Application July 27, 1929, Serial No. 381,413 Renewed May 25, 1933 14 Claims.

My invention relates to globes or other articles of glass such as canteen globes or other shapes designed particularly for use in advertising certain goods as well as for illuminating purposes,

a common form being globes used in connection with pumps for gas filling stations, although not restricted to this use nor to the canteen shape or type of globe.

Heretofore, such globes have been made in one piece, being blown to shape in the usual way of blowing glass and then etched or sand blasted to produce a particular design upon the exterior surface thereof which is painted in one or more colors indicating a design of trade-mark advertising certain goods. This left the paint exposed to weather conditions, with the result that in addi tion to breakage, the painted design soon became disfigured or mutilated and either required replacement or redecorating. Of course, the 2s painting or ornamenting on the globe might be for artistic or other purposes.

In accordance with the present invention I produce a globe in sections which are interiorly etched or sand blasted with a particular design and painted and then the sections are secured together so that the ornamenting is located interiorly and thereby protected from exposure to weather conditions. For this purpose I provide a novel form of mold in which the globe is blown in such a manner as to produce an irregular surface with readily breakable points or lines encircling the globe, preferably in the form of ridges so that the globe after being blown may be separated into sections capable of being readily united to produce the complete globe after the interior surfaces of the sections have been painted or otherwise ornamented.

It is also the object of the invention to provide a novel method of producing a globe of the character stated, and in conjunction therewith I use a mold including a separable ring section adapted to be associated with the sections of the mold in such a way as to produce the readily breakable ridges or lines of separation when the globe is blown, the molten glass in flowing over the ridges being such as to form an obstruction to the flow so that the wall at these points will be relatively thin, thereby facilitating separation of the sections to be later secured together in completing the globe.

A still further object of the invention is to provide a globe in which the sections when secured together will be practically as strong, if not stronger, than a one-piece globe, so as to resist breakage, while additional means is provided to span the joint between the sections and further insure against separation of the sections of the globe.

Other objects and advantages will be apparent as the description proceeds.

In the accompanying drawings:

Fig. l is a plan view of a mold constructed in accordance with the invention, the sections thereof being shown closed in full lines and one section opened out in dotted lines;

Fig. 2 is a vertical sectional view taken on the lines 22 of Fig. l;

Fig. 3 is a vertical sectional view at right angles to Fig. 2 and taken on the line 3-3 of Fig. 1;

Fig. 4 is a horizontal sectional view taken on the line 4-4 of Fig. 3;

Fig. 5 is an enlarged fragmentary vertical sectional view taken on the line 55 of Fig. 3;

Fig. 6 is a sectional view of a globe showing the form in which it is blown; 7 5,

Fig. 7 is an enlarged fragmentary sectional view of a portion of the globe;

Fig. 8 is an enlarged fragmentary sectional view showing the manner of joining the sections of the globe;

Fig. 9 is an enlarged fragmentary sectional view showing the neck portion of the globe;

Fig. 10 is an elevation of a completed globe with a holder designed toretain the sections thereof in assembly in addition to supporting the globe and serving as anchoring means on a globe holder;

Fig. 11 is an edge elevation of the globe;

Fig. 12 is a vertical sectional View of the completed globe;

Fig. 13 is an enlarged fragmentary sectional view taken on the line 13l3 of Fig. 10;

Fig. 14 is an enlarged fragmentary inside elevation looking toward the neck portion of the globe;

Fig. 15 is a sectional view taken on the line 15-15 of Fig. 9; and

Fig. 16 is an enlarged sectional View showing another way of forming the globe sections and connecting the same.

Referring to the drawings in detail, there is shown a glass mold comprising the sections 1'7 and 18 which are usually of metal and which are shown provided at one end of each with a pair of pivot ears 19 connected by a pivot or pintle 20 by which the sections of the mold are pivotally connected. Each section is also provided with a handle 21 at its free end and one section is provided with one or more latches 22 designed to engage corresponding keepers 23 on the other sections so as to hold the sections in closed position and to permit them to be readily separated when desired.

The mold sections are adapted to be mounted on a base 23 also of metal, which base has a raised portion 24 undercut as indicated at 25 to fit corresponding grooves 26 in the coacting sections 17 and 18 of the mold, as shown more particularly in Fig. 2 of the drawings. The mold sections as illustrated are hollowed out according to the shape and design of the globe to be produced and in the illustration, they are so formed as to produce what is known in the art as a can-' teen globe, but I do not desire to be limited to this particular shape in which the globe is round and relatively flat.

At a suitable point around the circumference of the globe at which the same is to be separated into sections, means is provided for causing the formation of readily breakable ridges, these being primarily in the form of a groove outwardly of the inner face of the mold or substantially in line therewith, together with ribs on either side thereof forming relatively sharp angular portions or edges over which the molten glass must flow during the blowing operation so as to restrict the amount of flow and consequently the thickness of the glass at these points whereby to facilitate rasping and breaking of the globe into sections which are to be later secured together after being painted or ornamented to produce the complete globe.

In the form illustrated, the coacting faces of the mold sections 1'7 and 18 are recessed as indi cated at 27, these recesses coacting to form an interior annular groove, although the cut may be made entirely through the walls of the sections instead of extending partially therethrough with annular outer shoulders 28 terminating in spaced relation to the outer faces of the mold sections in the embodiment shown and particularly as illustrated in Fig. 4 of the drawings.

Also, it will be understood that the groove may extend horizontally instead of vertically, depending upon the design of the globe and whether the sections are to be joined vertically, horizontally or otherwise. One illustration of a globe with the sections joined horizontally would be that depicting a red crown, but in either form the same principle prevails.

The groove formed by the coacting recesses 2'7 is adapted to receive a ridge producing collar which includes a stationary section 29 which is anchored to the base plate 23 as indicated at 30, and a movable or slidable section 31 which is slidably mounted on the base plate 23. In the form illustrated, more particularly in Figures 3 and 5 of the drawings, the movable section 31 has a dovetailed extension 32 fitting a corresponding groove 33 in the base 23 and this movable section has a handle 34 by which it may be shifted toward and away from the stationary section 29 so as to restrict or enlarge the space 35 between the upper ends of the ring sections at the neck portion 36 of the mold, at which point the sections are recessed as indicated at 3"! so as to form the neck of the globe, which may be spirally grooved to form a threaded neck on the globe.

In producing the globe, a blowpipe 88 of the usual or any preferred type having a mouthpiece 39', a handle 40 of cork or other heat insulating material, and an enlargement 41' at its free end, is dipped into the molten glass so as to apply thereto a blank l2 of such glass. The mold sections are then separated by the handles 21 after the movable ring section 31 is slid outwardly by the handle 34 to separate it from the stationary section 29 at the space 35 and then the blank of glass on the blowpipe is inserted into the mold, after which the ring section 31 is moved back into position limited by the shoulder 32 produced at the inner end of the recess 33 and the adjacent end of the stationary ring section 29, the mold sections closed by the handles 21 and the catches 22 engaged. In the event that a globe of canteen shape is to be produced, t -e blank of glass is first tapped on the sides thereof to secure initial shaping of the blank according to the shape of the globe to be produced, thus securing more uniformity of wall and facilitating the blowing operation in accordance with my present method.

As illustrated, the ring is provided with an internal groove 39 substantially V-shaped in cross section, thus providing sharp angular projections or ribs 40 on either side projecting inwardly of the face of the mold cavity. The sharp angular groove may, if desired, project slightly outwardly of the face of the mold cavity, but this is not essential. The blowing is then carried out in the usual way, forcing the glass to form the globe wall 41 of substantially uniform thickness within the cavity and conforming to the contour thereof. As the blowing operation is carried on, the free end of the blowpipe, which is initially inserted into the cavity of the mold through the neck portion thereof, is gradually Withdrawn and may be bent down to a horizontal position, if desired, as shown in Figure 3 of the drawings. The continued blowing produces the neck portion 42, which may be threaded to conform to the grooves in the neck portions and as the glass is drawn out, 3,

able points by which the globe as blown may be rasped or cut and separated into sections. This is due to the flow of the molten glass over the shoulders which are comparatively abrupt and substantially at right angles to the axis of the mold and thus the globe produced therein is restricted or obstructed and the flange formation is tapered as clearly shown in the drawings.

A similar result is produced by the flow of the glass into the crotch or angular portion of the groove 39 in the ring, thus resulting in a substantially V-shaped formation at the medial portion of the globe as indicated at 45 with a readily breakable portion 46 along the line of which the globe may first be separated. into sections by raspor cutting if so desired.

Substantially, the portion 45 is removed either up to the flanges 44 as indicated in Figure 8 of the dra ings, or up to the angular points 47 as indicated more particularly in Figure 16 of the drawings, so as to prepare the edge portions of the mold sections for joining them together. Where the separation is made at the angular points of the flanges 44, the surfaces 48 are ground down in the usual Way so as to be fitted together and cemented subsequent to the painting or ornamenting of the sections interiorly, as indicated at 4.9 in Figure 8 of the drawings. If the separation is accomplished at the angular points 4'7, the flanges are thus provided with lips or rims 5i) producing a relatively Wide annular cavity 51 "between the sections for accommodat- Ling-the'cement. -'In additioma strap 52 of metal may be used to connect the sections, being formed to fit over the "flanges 4'4:and boltedlthrough the 'sectionsas indicated at '53 In addition to the -separation of the globe into sections, the neck portion of the :mold is provided with a relatively-deep recess 54 resulting in the annular groove formation 55 in the neck portion of -'the globe with a relatively thin -'and "breakable Wall permitting the neck :portion :of "the -'-gl'obe to be severed and groundidown .as already explained. The separatedsections'are then etched or sand blasted 'interi'orly as 'indicated'at 56 to be coated "with paint-or otherwise 'or'name'nted as indicated at "5'7,"-so as 'toproduce this ornamenting upon-the interior wall. 'This' 'is pre'f 'erablycarried-out in-accordance with-theprocess described in my prior "Patent'No. 1,6055570 dated *November '2, "1926} but I 'do not desire' to' belimited to'theuse'of-such particular-process. "Thus, when the sections of the globe are-connected "or cemented together as described, the paint will be :protected from the weather and last almost *in- "definitely.

As an additional means for 'connecting 'thesections of theglobeand-holding them in assemb'le'd relation, a" threaded I metallic neck 'band :58 .is securedon to the threaded neckportion of 'i'the globe and this band has'za flange "59 adapted :to be secured in'a holder 60'as by means ofscrews or other fasteners "61. 'Thus,the band in addition to serving as means for "fastening the globe 'to a pump-or head-"of a lamp postgalsof'servesas -means-topositivelyholdthe sections of the-globe in assembled relation in addition to lthescementing means at the joint and the securing :means at a point diametrically opposite the neck as represented by the strap or connector 52 and the bolts 53 attaching the ends thereof to the respective sections of the globe. Incidentally, it

may be stated that the flanges 44 preferably taper and gradually widen toward the neck opening while the neck portion is also substantially thicker, as clearly shown in the drawings and particularly in Figure 15. As a matter of fact, the flanges 44 at the neck portion are comparatively short, but the joint is formed as shown in Figure 8 or as shown in Figure 16, according to the points at which the globe is separated into sections.

It will thus be seen that I have provided a novel form of sectional globe which may be blown by those specializing in this field, in accordance with the well known methods, using a mold of novel construction and design as above described, the resulting formation being such that the globe is provided with one or more readily breakable portions or lines encircling the same Where glass is particularly thin so that the globe may be divided into sections.

By this means the interior surfaces of the sections are rendered particularly accessible for decorating or ornamenting, such as by etching or sand blasting and then painting into the depressed surfaces thus formed, whereas this has not been possible heretofore owing to the fact that the globes have always been produced in one piece and were not accessible interiorly for ornamenting and thereby necessitated exterior ornamentation which quickly deteriorated when exposed to all sorts of weather conditions. The mold is so constructed that its structure is comparatively simple as well as its assemblage,

I and the operation in conjunction with the blowsing such as tozfacilitate theinsertion of theblank, the'i'blowing, separation of the sections of .the -mold sand the :removal of the bl-own globe for sep'arationinto sections :to be subsequently .connected zafter' being :etched 'and'painted-sor: otherwise zornamented.

While v.I have tillustrated a :preferred embodiqnent :of my invention, many .modifications may he ima'de without departing from the spiritof ithe invention, and 11 tdo'not wish to be .limited to the precise details of -'"c'onstr uction-set forth, 'i'but'desire ito ravailimyself-of all changes Within theiscopeof'the.appended'claims.

:Having thus :described :my invention, what 'I :claimisnew. and desire to secure'by LettersiPatent-(of "the United "States is:

1. Themethod ofzproducing a-glass globe con- :sisting in blowing a :globe 'with a readily break able point, 'separatingtheglobe into sections at said moint-candsubsequently uniting the sections.

l 2. methodot producing. asectional globe consisting fin blowing a :globe with readily breaka'ablellines of demarcation, separating the globe :in'to*-sections,ornamenting the sections interior- 1y andasubsequently connecting the sections.

3. Iheamethod of producing -a glass globe consistinginblowing a" globe of molten glass in a -mold withridges producing relatively thin readily breakable :portions surrounding the globe,

separating said:globe.into sections to-expose the interior faces thereof for ornamenting such as :sand blastingzand painting and subsequently "con- :necting the sections to prevent exposure of the interior ornamenting.

4. 3A .mold 'for .blowing glass globes including pivoted sectionszhaving :coacting cavities, a base :on whichsaidsections are :mounted, said sec- -tionszhavingzcoacting :recessesiorming 1 a groove, and a ring mounted in said groove and having an annular groove producing ridges projecting inwardly, said ring comprising a stationary section mounted on the base and a movable section coacting with the stationary section.

5. A mold for blowing glass globes including pivoted sections having coacting cavities, a base on which said sections are mounted, said sections having coacting recesses forming a groove, and a ring mounted in said groove and having an annular groove producing ridges projecting inwardly, said ring comprising a stationary section mounted on the base and a movable section coacting with the stationary section, said movable section having slidable connection with the base and coacting with the other section at the neck of the mold and globe to be produced thereby, and means for holding the sections of the mold in closed position.

.6. A mold for blowing glass globes including pivoted sections, having co-acting cavities, a base on which said sections are mounted, said sections having co-acting recesses forming a groove, a ring mounted in said groove and having at least one interior groove to produce an annular rib in and surrounding the globe blown therein, said ring comprising a stationary section mounted on the base and a slidable section co -acting with the stationary section and adapted to be displaced from globe after the sections are opened to permit withdrawal of the globe from the mold.

'7. A mold for blowing glass globes including separable sections having co-acting cavities, a base for said sections, said sections having coacting recesses forming a groove, a ring mounted in said groove and having at least one interior groove to produce an annular rib in and surrounding the glass globe blown therein, said ring comprising separable sections at least one of which is displaceable after the sections are opened to permit withdrawal of the globe from the mold.

8. A mold of the class'described including sections with an interior cavity and having an interior irregularity in its cavity forming an annular groove at the juncture of its sections and icontiguous with the line of separation thereof to obstruct the flow of the molten glass thereover during the blowing operation to provide a relatively thin wall portion which is readily breakable for dividing the globe into sections, and an interiorly grooved separable ring in said groove projecting inwardly of the cavity wall of the mold at points to form connecting flanges on the globe sections to permit subsequent connecting thereof and permit separation of the sections of th mold to remove the globe therefrom.

9. A mold comprising hinged sections with an interior groove and a separable-grooved ring in said groove with projections on either side thereof projecting inwardly of the cavity wall of the mold at the juncture of the sections contiguous with the line of separation of the sections and on either side thereof, forming an obstruction to the flow of the molten glass in flowing over the same during the blowing operation to form connecting flanges on the mold sections at the readily breakable points of the globe when the latter is separated.

10. A mold for blowing glass globes including pivoted sections having co-acting cavities to form a globe having a neck, a base on which said sections are mounted, said sections having co-acting recesses in their co-acting faces extending to the cavity wall forming a groove surrounding the globe and bisecting the neck thereof longitudinally, and a separable ring mounted in said groove with at least one displaceable section and having an interior annular groove and inwardly projecting ridges on each side thereof and of the normal wall of the globe to form readily breakable points for separating the globe into sections and inwardly projecting flanges adapted to abut each other when the globe sections are placed together for connection.

11. A mold for shaping glass globes, including partible side sections recessed in their opposed faces, and partible curved sections disposed between said sections and circumferentially of the space between the side sections, the said sections cooperating to form a mold cavity.

12. A mold for shaping glass globes, including partible side sections recessed in their opposed faces, partible curved sections disposed between said sections and circumferentially of the space between the side sections, the said sections cooperating to form a mold cavity, and at least one of the sections having its inner wall radially offset along a line peripheral to said space.

13. A mold for shaping glass globes, including partible side sections recessed in their opposed faces, partible curved sections disposed between said 'sections and circumferentially of the space between the side sections, the said sections cooperating to form a mold cavity, and the intermediate sections being radially offset at their lines of juncture with the side sections.

14. A mold for shaping glass globes, including partible side sections recessed in their opposed faces, radially-divided curved sections disposed between said sections and circumferentially of the space between the side sections, the said sections cooperating to form a mold cavity.

JOHN C. SMITH.

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