US3228687A - Bowling pin with hollow metal core comprising a plurality of sections - Google Patents

Bowling pin with hollow metal core comprising a plurality of sections Download PDF

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Publication number
US3228687A
US3228687A US261055A US26105563A US3228687A US 3228687 A US3228687 A US 3228687A US 261055 A US261055 A US 261055A US 26105563 A US26105563 A US 26105563A US 3228687 A US3228687 A US 3228687A
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US
United States
Prior art keywords
bowling pin
sections
bowling
die cast
metal core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US261055A
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English (en)
Inventor
Alfred F Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NL Industries Inc
Original Assignee
Nat Lead Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL302460D priority Critical patent/NL302460A/xx
Application filed by Nat Lead Co filed Critical Nat Lead Co
Priority to US261055A priority patent/US3228687A/en
Priority to FR957825A priority patent/FR1377836A/fr
Priority to BE641553A priority patent/BE641553A/xx
Priority to LU45080D priority patent/LU45080A1/xx
Priority to CH1579963A priority patent/CH411660A/fr
Priority to DE19631453145 priority patent/DE1453145A1/de
Priority to GB4167/64A priority patent/GB1002871A/en
Application granted granted Critical
Publication of US3228687A publication Critical patent/US3228687A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63D—BOWLING GAMES, e.g. SKITTLES, BOCCE OR BOWLS; INSTALLATIONS THEREFOR; BAGATELLE OR SIMILAR GAMES; BILLIARDS
    • A63D9/00—Pins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/03—Epoxy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/06—Nylon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S273/00—Amusement devices: games
    • Y10S273/08—Urethane

Definitions

  • Bowling pins in the past have generally been made of wood and more particularly of hard maple.
  • the supply of the type of maple used for wooden bowling pins has diminished in this country, while the increase in popularity of the sport of bowling has produced a demand for greater and greater numbers of bowling pins.
  • the typical wood bowling pins has several inherent disadvantages.
  • One disadvantage is that the wooden bowling pin becomes marred and chipped after a relatively short time thus making it necessary that the pins be removed from service, turned down a lathe, and then refurbished by application of a new plastic outer layer.
  • Another disadvantage is that the reduced neck section of a wooden bowling pin is very susceptible to failure by way of breakage.
  • the metal portion of the pin has been formed by a sand casting process.
  • a sand cast-ing process is used in producing a metal bowling pin core
  • the resultant metal core does not have desirable physical characteristics.
  • the wall thicknesses of the core cannot be control-ledto close tolerances.
  • the nonuniform wall thickness of the metal core produced by. the sand casting process results in a bowling pin which is unbalanced and thereby unacceptable.
  • Another object of the present invention is to provide a metal bowling pin of the same size, shape and weight distribution of a standard wooden bowling pin.
  • Still another object of the invention is to provide a "ice metal bowling pin which gives the same sound and action as does a standard wood bowling pin when struck by the bowling ball, or when the bowling pins fall upon the lanes or alleys.
  • Still another object of this invention is to provide a metal bowling pin which does not have a tendency to split or separate under the impact of a bowling ball.
  • Another object of this invention is to provide a metal bowling pin which has a neck section of greater strength and durability than a typical wood bowling pin.
  • FIG. 1 is a front elevation view showing a bowling pin embodying the invention
  • FIG. 2 is a vertical cross-sectional view, taken along the line 22 of FIG. 1 and drawn on an enlarged scale, wherein a portion of the sound deadening layer has been removed to show the use of reinforcing ribs. Several of the reinforcing ribs have been omitted in this figure for purposes of clarity;
  • FIG. 3 is a vertical cross-sectional assembly view of another embodiment of the invention, in which only the three cast sections are shown;
  • FIG. 4 is a horizontal cross-sectional view, taken along the line 44 of FIG. 3 and drawn on an enlarge scale, wherein an outer layer of plastic material and an inner layer of sound deadening material are shown;
  • FIG. 5 is a horizontal cross-sectional view taken along the line 55 of FIG. 2, in which a portion of the inner sound deadening layer is shown.
  • the present invention com-prises a die cast metal bowling pin which is to be used as a substitute for the presently used hard maple bowling pin.
  • the metal bowling pin comprises a sectional hollow, die cast light metal (aluminum or magnesium alloy) core, said sections being joined together by a welding process, an adhesive bonding process, a pressure fit process, or by a combination of the preceding methods.
  • a layer of sound deadening material is placed on the interior surface of the hollow metal core and a layer of a semi-flexible plastic material is formed over the outer surface of the metal core.
  • the metal bowling pin 10 comprises a hollow metal core 11 constructed of three hollow metal die cast sections namely: a lower cup-like section 12, an intermediate neck section 13, and cap section 14.
  • the three sections of the bowling pin, namely sections 12, 13 and 14, are joined together at joints 15 and 16 which are transverse to the longitudinal axis of the bowling pin.
  • the lower transverse joint 16 is located at a point above the point of impact P between a standard 16 pound bowling ball and the bowling pin 10 and the upper transverse joint 15 is located well above the point of impact. Because of the lack of a longitudinal joint and the positions of the transverse joints, at no time will a bowling ball directly strike the bowling pin at a joint, therefore the tendency of the bowling pin to split apart at the joints is greatly reduced.
  • a plurality of integrally die cast and circumferentially spaced reinforcing ribs 17 are provided in one embodiment of the invention, on the interior surface of die cast sections 12 and 13.
  • the reinforcing ribs 17 extend longitudinally on the interior surfaces of the bowling pin 10 and are formed so they extend beyond their respective castings 12 and 13 and engage frictionally with the body of the adjacent casting.
  • a reinforcing rib 17a which is. die cast integrally with lower cup-like section 12, extends past the lower transverse joint 16.
  • the exteriorsurface .18 of the reinforcing rib 17a has ap' proximately the same shape as the surface 19 of the inter mediate neck section 13 at the same horizontal plane.
  • the reinforcing rib 17a is cast so that the upper portion which engages with intermediate neck section 13 has an exterior radius slightly greater than the interior radius of the intermediate neck section 13. Therefore when the castings 12 and 13 are joined together the upper portion of reinforcing rib 17a serves as a cantilever.
  • the compression fit resulting from the difierence in radii applies force along the surface of the cantilever whichresults in a counteracting moment which in turn applies force to the interior surface 19 of the die cast section 13.
  • the three die cast metal sections 12, 13 and 14 are joined together preferably by the Sciaky Welding method, which is a flash welding process in which the two sections to be joined are made electrodes.
  • the Sciaky method is used because of its characteristic fast cycle of welding which confines the welding heat almost completely to the ends of the surfaces to be welded and thus prevents the body of the sections of the metal core 11 from overheating.
  • the intermediate neck section 13 and the cap section 14 can be joined together by other methods, for example, by the use of a resin-binding material such as an epoxy resin.
  • Shoulders 20 are provided on the sections 12 and 13, and sections 13 and 14 respectively, to serve as guides to position the sections in a uniform manner, during the welding or bonding processes.
  • the production of the hollow metal core 11 by a die casting process results in a core which has extremely uniform Wall thickness.
  • the wall thickness of the hollow metal core in the instant invention, it meas wed in a plane perpendicular to the longitudinal axis of the bowling pin does not vary more than 0.0015 inch. It is very important in the metal bowling pin art that the wall thicknesses of the hollow metal cores be kept to extremely close tolerances so that the completed bowling pin is symmetrical and therefore balanced. Such a balanced bowling pin cannot be produced, with any degree of consistency, by a sand casting process in which sand cores must be used,
  • FIG. 3 shows another embodiment of the invention which depicts another method of joining the individual sections 12, 13 and 14 together.
  • the die cast sections 12, 13 and 14 are cast with fingers 21 on the lower section 12 and fingers 22 on the intermediate section 13.
  • the fingers 21 and 22 extend beyond their respective castings 12 and 13 and interengage with the body of the adjacent casting. 'This forms a very firm joint and when the two sections 12 and 13 are pressed together, the resiliency of the metal makes it virtually impossible to pull them apart.
  • Intermediate neck section 13 and'cap section 14 are joined'in a similar manner.
  • a rubber-like sound deadening material 23 such as a foaming polyurethane spray, is applied to'the inner wall of each of the three sections 12, 13 and 14.
  • the sound deadening material 23 is, for example, sprayed into the assembled die cast sections 12, 13 and 14, through an axial opening 24 which is formed in the bottom of lower cup-like section 12.
  • This rubber-like sound deadening material 23 is provided on the interior surface of the process,-and after the sound deadening material 17 has been applied, an outer layer of plastic material 25 is applied to the assembled castings.
  • Cap section 14 is provided with an axial opening 26 which engages with a centering pin located in the plastic coating mold (not shown).
  • the outer layer of plastic material 25 is applied in the mold under pressure and the plurality of reinforcing ribs 17 prevent the hollow metal core 11 from deforming during this process. If reinforcing ribs are not used, the outer layer of plastic material 25 maybe applied by low pressure molding process. After the outer plastic layer 25 is applied, a nylon insert 27 is adhesively or otherwise secured to the lower cup-like section 12. Insert 27 defines a shoulder 28 which guards the lower end 29 of the outer plastic layer 25 and serves to protect the lanes or alleys from excessive marin'g and is constructed in accordance with American Bowling Congress regulations.
  • the bowling pin 10 is constructed so that the weight of any segment of the bowling pin defined by two parallel planes which are perpendicular to the longitudinal axis of the bowling pin is the same as the weight of a similar segment of a hard maple bowling pin defined by the same planes.
  • the thickness of the outer plastic and the hollow metal core is determined by the relative density or specific gravity of the plastic used in the outer layer and the relative density or specific gravity of the metal used in the core with relation to the specific gravity of hard maple. Therefore, as previously discussed, a unit cross section of the embodiment of the present invention will weigh approximately the same as a unit cnoss section, taken at the same vertical position, of a hard maple bowling pin.
  • a bowling pin comprising a die cast hollow light metal core, said core comprising a plurality of die cast sections joined together in end-to-end relation, whereby the joints formed are transverse to the longitudinal axis of said bowling pin, at least one of said die cast sections having a plurality of integrally cast and circumferentially spaced reinforcing ribs extending longitudinally along its interior surface, said reinforcing ribs extending beyond one end of said die cast section and interengaging with the interior surface of the adjacent die cast section, a coating of sound deadening material on the inner surface of said metal core, a layer of a plastic material on the outer surface of said metal core, and a protective insert secured to the bottom of said bowling pin.
  • a bowling pin according to claim 1 in which said hollow metal core comprises three die cast sections joined together in end-to-end relation, whereby the upper and intermediate sections and the lower and intermediate sections are joined together at a point above the point of impact between'a standard bowling ball and said bowling pin.
  • a bowling pin comprising a die cast hollow metal core, said hollow metal core comprising three die cast sections welded together in end-to-end relationship, where by the joints formed are transverse to the longitudinal axis of said bowling pin and wherein the wall thickness of said hollow metal core, if measured in a plane perpenduclar to the longitudinal axis of said bowling pin does not vary more than 0.0015 inch, at least one of said die cast sections having a plurality of integrally cast and circumferentially spaced reinforcing ribs extending longitudinally along its interior surface, said reinforcing ribs extending beyond one end of said die cast section and 5, inter-engaging with the interior surface of the adjacent die cast section, a coating of sound deadening material on the inner surface of said metal core, a layer of a plastic material on the outer surface of said metal core, and a protective insert secured to the bottom of said bowling pin.

Landscapes

  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US261055A 1963-02-26 1963-02-26 Bowling pin with hollow metal core comprising a plurality of sections Expired - Lifetime US3228687A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL302460D NL302460A (sv) 1963-02-26
US261055A US3228687A (en) 1963-02-26 1963-02-26 Bowling pin with hollow metal core comprising a plurality of sections
BE641553A BE641553A (sv) 1963-02-26 1963-12-19
FR957825A FR1377836A (fr) 1963-02-26 1963-12-19 Quille métallique pour le jeu de quilles dit <<bowling>>
LU45080D LU45080A1 (sv) 1963-02-26 1963-12-21
CH1579963A CH411660A (fr) 1963-02-26 1963-12-21 Quille et procédé de fabrication de cette quille
DE19631453145 DE1453145A1 (de) 1963-02-26 1963-12-24 Metallkegel
GB4167/64A GB1002871A (en) 1963-02-26 1964-01-31 Bowling pins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US261055A US3228687A (en) 1963-02-26 1963-02-26 Bowling pin with hollow metal core comprising a plurality of sections

Publications (1)

Publication Number Publication Date
US3228687A true US3228687A (en) 1966-01-11

Family

ID=22991770

Family Applications (1)

Application Number Title Priority Date Filing Date
US261055A Expired - Lifetime US3228687A (en) 1963-02-26 1963-02-26 Bowling pin with hollow metal core comprising a plurality of sections

Country Status (7)

Country Link
US (1) US3228687A (sv)
BE (1) BE641553A (sv)
CH (1) CH411660A (sv)
DE (1) DE1453145A1 (sv)
GB (1) GB1002871A (sv)
LU (1) LU45080A1 (sv)
NL (1) NL302460A (sv)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445113A (en) * 1964-04-21 1969-05-20 Brunswick Corp Sectional bowling pin with metal liner and outer plastic shell
US3830496A (en) * 1971-10-14 1974-08-20 Amf Corp Bat
US3861682A (en) * 1972-03-06 1975-01-21 Hirokazu Fujii Baseball bat
US3984104A (en) * 1976-01-29 1976-10-05 Maurice Anthony Negrini Plastic bowling pin
US4056267A (en) * 1974-05-10 1977-11-01 St. Louis Diecasting Corporation Die cast bat with rod
US4103412A (en) * 1976-05-11 1978-08-01 St. Louis Diecasting Corporation Method of making a foam filled die cast bat
US5104123A (en) * 1990-06-08 1992-04-14 Somar Corporation Metal bat for use in baseball
US20040180727A1 (en) * 2002-12-27 2004-09-16 Hamamatsu Kenma Co., Ltd Bowling pin and manufacturing method of the same
US20110244974A1 (en) * 2006-10-20 2011-10-06 Qubicaamf Worldwide, Llc Bowling pin and method of manufacture
US20150375092A1 (en) * 2013-02-22 2015-12-31 Rinotop Oy Method for manufacturing bowling pin with adjustable properties, and pin
CN108247994A (zh) * 2018-01-23 2018-07-06 广州贝士特橡塑有限公司 橡胶包铁心秤砣及加工设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1060932A (en) * 1912-11-29 1913-05-06 William P Mussey Bowling-pin.
US1491279A (en) * 1922-12-06 1924-04-22 Andrew M Stewart Bowling pin
US2166950A (en) * 1937-09-15 1939-07-25 Frank O German Game appliance and method of making
US2340156A (en) * 1941-12-19 1944-01-25 Thomas M Taylor Ball bat
GB884983A (en) * 1959-03-08 1961-12-20 Brunswick Balke Collender Co Bowling pin
US3025060A (en) * 1959-03-09 1962-03-13 Hollingsworth R Lee Bowling apparatus
US3044777A (en) * 1959-10-19 1962-07-17 Fibermold Corp Bowling pin

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1060932A (en) * 1912-11-29 1913-05-06 William P Mussey Bowling-pin.
US1491279A (en) * 1922-12-06 1924-04-22 Andrew M Stewart Bowling pin
US2166950A (en) * 1937-09-15 1939-07-25 Frank O German Game appliance and method of making
US2340156A (en) * 1941-12-19 1944-01-25 Thomas M Taylor Ball bat
GB884983A (en) * 1959-03-08 1961-12-20 Brunswick Balke Collender Co Bowling pin
US3025060A (en) * 1959-03-09 1962-03-13 Hollingsworth R Lee Bowling apparatus
US3044777A (en) * 1959-10-19 1962-07-17 Fibermold Corp Bowling pin

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445113A (en) * 1964-04-21 1969-05-20 Brunswick Corp Sectional bowling pin with metal liner and outer plastic shell
US3830496A (en) * 1971-10-14 1974-08-20 Amf Corp Bat
US3861682A (en) * 1972-03-06 1975-01-21 Hirokazu Fujii Baseball bat
US4056267A (en) * 1974-05-10 1977-11-01 St. Louis Diecasting Corporation Die cast bat with rod
US3984104A (en) * 1976-01-29 1976-10-05 Maurice Anthony Negrini Plastic bowling pin
US4103412A (en) * 1976-05-11 1978-08-01 St. Louis Diecasting Corporation Method of making a foam filled die cast bat
US5104123A (en) * 1990-06-08 1992-04-14 Somar Corporation Metal bat for use in baseball
US20040180727A1 (en) * 2002-12-27 2004-09-16 Hamamatsu Kenma Co., Ltd Bowling pin and manufacturing method of the same
US7052406B2 (en) * 2002-12-27 2006-05-30 Hamamatsu Kenma Co., Ltd. Bowling pin and manufacturing method of the same
US20110244974A1 (en) * 2006-10-20 2011-10-06 Qubicaamf Worldwide, Llc Bowling pin and method of manufacture
US8602906B2 (en) * 2006-10-20 2013-12-10 Qubicaamf Worldwide Llc Bowling pin and method of manufacture
US20150375092A1 (en) * 2013-02-22 2015-12-31 Rinotop Oy Method for manufacturing bowling pin with adjustable properties, and pin
CN108247994A (zh) * 2018-01-23 2018-07-06 广州贝士特橡塑有限公司 橡胶包铁心秤砣及加工设备

Also Published As

Publication number Publication date
LU45080A1 (sv) 1964-06-21
DE1453145A1 (de) 1968-12-12
CH411660A (fr) 1966-04-15
NL302460A (sv)
BE641553A (sv) 1964-06-19
GB1002871A (en) 1965-09-02

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