US3777359A - Method of making skeletal tetrahedrons - Google Patents

Method of making skeletal tetrahedrons Download PDF

Info

Publication number
US3777359A
US3777359A US00240053A US3777359DA US3777359A US 3777359 A US3777359 A US 3777359A US 00240053 A US00240053 A US 00240053A US 3777359D A US3777359D A US 3777359DA US 3777359 A US3777359 A US 3777359A
Authority
US
United States
Prior art keywords
triangles
skeletal
base
pair
tetrahedrons
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
US00240053A
Other languages
English (en)
Inventor
E Bardot
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3777359A publication Critical patent/US3777359A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
    • G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective
    • 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
    • Y10S52/00—Static structures, e.g. buildings
    • Y10S52/10—Polyhedron
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49893—Peripheral joining of opposed mirror image parts to form a hollow body
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material

Definitions

  • the present invention relates to the production of skeletal tetrahedrons, more particularly by molding.
  • FIG. 1 is an exploded assembly view of a pair of identical components of a skeletal tetrahedron in which the triangular sides are equilateral triangles, in position for assembly;
  • FIG. 2 is a view similar to FIG. 1 but showing an embodiment of the invention in which the triangular sides of the tetrahedron are isosceles triangles.
  • FIG. 1 there is shown a pair of components of a skeletal tetrahedron, each of which is characterized by a base 3 and legs 4, the base 3 forming with each pair of interconnected legs 4 an equilateral triangle, the equilateral triangles having their apices remote from base 3 spaced apart a distance equal to the length of base 3.
  • each of the apices of each of the components shown in FIG. 1 is located at an apex of the tetrahedron to be formed.
  • the triangles formed by the apices are equilateral and each apex is the same distance from each other apex.
  • the base 3 will be about twice as thick as the legs 4, the skeletal tetrahedron being formed from two identical components as shown in FIG. 1, which are assembled by moving them together from a position in which they are oriented as in FIG. 1, and then securing them together by any convenient means such as soldering, cementing, riveting or the like.
  • the components are produced by molding from any convenient material such as synthetic resin, which may be thermosetting or thermoplastic, or from metal such as aluminum.
  • Construction Set and Element Thereof-' namely, utility in a construction set for amusement and/or educational purposes.
  • FIG. 2 is like that of FIG. 1, ex-
  • a method of producing a skeletal tetrahedron comprising forming by molding a plurality of identical components each comprised by a pair of skeletal triangles having a common base with the apices of the triangles spaced apart a distance equal to the length of the base, and then securing together a pair of said components with the components nested together and the base of each component extending between the apices of the triangles of the other component of the pair.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Algebra (AREA)
  • Business, Economics & Management (AREA)
  • Geometry (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Toys (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US00240053A 1971-04-02 1972-03-31 Method of making skeletal tetrahedrons Expired - Lifetime US3777359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7111659A FR2132945A5 (enrdf_load_stackoverflow) 1971-04-02 1971-04-02

Publications (1)

Publication Number Publication Date
US3777359A true US3777359A (en) 1973-12-11

Family

ID=9074635

Family Applications (1)

Application Number Title Priority Date Filing Date
US00240053A Expired - Lifetime US3777359A (en) 1971-04-02 1972-03-31 Method of making skeletal tetrahedrons

Country Status (5)

Country Link
US (1) US3777359A (enrdf_load_stackoverflow)
DE (1) DE2215794A1 (enrdf_load_stackoverflow)
FR (1) FR2132945A5 (enrdf_load_stackoverflow)
GB (1) GB1329067A (enrdf_load_stackoverflow)
IT (1) IT952526B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026087A (en) * 1976-04-20 1977-05-31 White Robert R Building block
US4086738A (en) * 1976-10-12 1978-05-02 Louis Saccoccio Kit and components for constructing decorative polyhedrals
WO1994013896A1 (en) * 1989-11-15 1994-06-23 Power Rings, Inc. Method of constructing flat building block modules
US20080078138A1 (en) * 2006-08-08 2008-04-03 Christopher Baker High Strength Lightweight Material
USD798392S1 (en) * 2014-05-27 2017-09-26 T. Dashon Howard Tetrahedral positive universal joint block

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2528044B (en) 2014-07-04 2018-08-22 Arc Devices Ni Ltd Non-touch optical detection of vital signs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR909217A (fr) * 1945-02-12 1946-05-02 Boule décorative pour arbres de noe:l
US2776521A (en) * 1954-10-27 1957-01-08 Elmer L Zimmerman Construction toy
GB848389A (en) * 1958-04-12 1960-09-14 Sankey Targetti Decorative star element for christmas trees
US3289322A (en) * 1965-06-08 1966-12-06 John J R Patrick Crystal structure display and method
US3645059A (en) * 1969-02-26 1972-02-29 Wilhelm Grimm Constructional element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR909217A (fr) * 1945-02-12 1946-05-02 Boule décorative pour arbres de noe:l
US2776521A (en) * 1954-10-27 1957-01-08 Elmer L Zimmerman Construction toy
GB848389A (en) * 1958-04-12 1960-09-14 Sankey Targetti Decorative star element for christmas trees
US3289322A (en) * 1965-06-08 1966-12-06 John J R Patrick Crystal structure display and method
US3645059A (en) * 1969-02-26 1972-02-29 Wilhelm Grimm Constructional element

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026087A (en) * 1976-04-20 1977-05-31 White Robert R Building block
US4086738A (en) * 1976-10-12 1978-05-02 Louis Saccoccio Kit and components for constructing decorative polyhedrals
WO1994013896A1 (en) * 1989-11-15 1994-06-23 Power Rings, Inc. Method of constructing flat building block modules
US20080078138A1 (en) * 2006-08-08 2008-04-03 Christopher Baker High Strength Lightweight Material
US7574830B2 (en) 2006-08-08 2009-08-18 Christopher Baker High strength lightweight material
USD798392S1 (en) * 2014-05-27 2017-09-26 T. Dashon Howard Tetrahedral positive universal joint block

Also Published As

Publication number Publication date
DE2215794A1 (de) 1972-10-12
GB1329067A (en) 1973-09-05
FR2132945A5 (enrdf_load_stackoverflow) 1972-11-24
IT952526B (it) 1973-07-30

Similar Documents

Publication Publication Date Title
US3160249A (en) Linear interlocking key or spline
US3884462A (en) Mobile geometrical form
US3987580A (en) Separably connective flexible toy
US3694954A (en) Construction element for the assembly of models and the like
US3562077A (en) Component for use in making decorative structures
US3777359A (en) Method of making skeletal tetrahedrons
US2308402A (en) Construction of molecular models
IE34565B1 (en) Molded synthetic plastics snap fastener and strip of components therefor
US3709767A (en) Decoration
GB1197169A (en) Plastics Snap Fastener
ATE24687T1 (de) Formstueck aus einem verbundwerkstoff und herstellungsverfahren hierzu.
GB1345433A (en) Toy model assembly employing integrated pre-oriented detail- defining members
US3272976A (en) Star shaped ornament
US3058266A (en) Lattice type plastic grille construction
CA969317A (en) Synthetic resin moulded product having a moulded label equivalent portion and method of manufacturing the same
CH459542A (de) Reissverschluss aus zwei Reissverschlusshälften, bestehend je aus Tragband mit daran gereihten, eine Verschlusskette bildenden, mit Kuppelköpfen ausgerüsteten Verschlussgliedern aus thermoplastischem Kunststoff
JPS6010836Y2 (ja) 表面改良発泡ポリエチレン樹脂成形品
US3103264A (en) Extruded cross sections for architectural screens
US2878021A (en) Bowling pin
CN109011542A (zh) 一种鲁班锁
GB1398091A (en) Augers
BE792273A (fr) Perfectionnements a la production de filets en plastiques extrudes
US3658203A (en) Bottle cap
IL22539A (en) Folding partitions and walls
CA995420A (en) Extruding foamable resin with expansion zone having plane and convex surfaces