GB761836A - Improvements in star projectors - Google Patents

Improvements in star projectors

Info

Publication number
GB761836A
GB761836A GB32262/54A GB3226254A GB761836A GB 761836 A GB761836 A GB 761836A GB 32262/54 A GB32262/54 A GB 32262/54A GB 3226254 A GB3226254 A GB 3226254A GB 761836 A GB761836 A GB 761836A
Authority
GB
United Kingdom
Prior art keywords
sphere
base
post
washer
light
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
Application number
GB32262/54A
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
Publication of GB761836A publication Critical patent/GB761836A/en
Expired legal-status Critical Current

Links

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
    • G09B27/00—Planetaria; Globes
    • G09B27/04—Star maps

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Instructional Devices (AREA)
  • Toys (AREA)

Abstract

761,836. Educational appliances. LIVERSIDGE, T. K. Nov. 8, 1954 [April 15, 1954], No. 32262/54. Class 146(2). A celestial sphere having star patterns 50 thereon for projection of light therethrough, is rotatably mounted on a post 26 pivotally mounted at 25 on a domed base 20. An internal directional light source 43 is mounted in a gravity directed socket 38 to throw light on to one half of the sphere according to the position in which the post 26 is fixed in a quadrant-shaped slot 24 in the moulded plastic base 20. The post and sphere are retained in adjusted position by frictional engagement of a rubber washer 33 which engages the outer face of the base 20 on both sides of the slot 24. The washer 33 is urged to grip the base by a spring 34, which at its other end, urges a washer 31 to clamp the sphere against a sleeve 29 of post 26. The sphere is formed of synthetic plastic material in two half-sections 30a, 30b held together by a resilient ring 36. The sphere is opaque, the light, adjustable by means of rheostat in the base, shining out only through the star patterns 50 on to the walls of a darkened room.
GB32262/54A 1954-04-15 1954-11-08 Improvements in star projectors Expired GB761836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US761836XA 1954-04-15 1954-04-15

Publications (1)

Publication Number Publication Date
GB761836A true GB761836A (en) 1956-11-21

Family

ID=22130454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32262/54A Expired GB761836A (en) 1954-04-15 1954-11-08 Improvements in star projectors

Country Status (1)

Country Link
GB (1) GB761836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630241A1 (en) * 1988-04-13 1989-10-20 Levy Francis Educational game for recognition of the constellations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630241A1 (en) * 1988-04-13 1989-10-20 Levy Francis Educational game for recognition of the constellations

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