GB958030A - Process for the production of albada finders - Google Patents

Process for the production of albada finders

Info

Publication number
GB958030A
GB958030A GB2076160A GB2076160A GB958030A GB 958030 A GB958030 A GB 958030A GB 2076160 A GB2076160 A GB 2076160A GB 2076160 A GB2076160 A GB 2076160A GB 958030 A GB958030 A GB 958030A
Authority
GB
United Kingdom
Prior art keywords
moulding
cement
tool
parts
cementing
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
GB2076160A
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.)
Voigtlander AG
Original Assignee
Voigtlander AG
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 Voigtlander AG filed Critical Voigtlander AG
Publication of GB958030A publication Critical patent/GB958030A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/84—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Astronomy & Astrophysics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)
  • Lenses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

958,030. Moulding optical elements. VOIGTLANDER A.G. June 13, 1960 [June 13, 1959], No. 20761/60. Heading B5A. [Also in Division G2] In a process for making a block form Albaba finder such as is shown in Fig. 2, a lens element 10 on the central block 6 is moulded in situ in a transparent synthetic resin cement. The moulding is preferably effected using the same cement and at the same time as the parts 1 and 6 are cemented together. A protective coating 3 of cement is also formed over an inclined mirror surface 2 of the front member 1. The cement preferably comprises an ethoxylene or epoxide resin. A tool for moulding the cement is shown at 13 and preferably comprises a thermoplastic material to which the cement does not adhere (3 examples are given) or a metal provided with a separating agent (e.g. silicone oil). The tool 13 is provided with a lug 131 for accurate positioning of the moulding surfaces 17 and 18 and also with a handle 133. A modified moulding tool illustrated in Fig. 3 (not shown), is provided with a separate clamp and holding member for accurately locating the parts 1 and 6 and the moulding tool in position for cementing. A more elaborate arrangement, shown in Fig. 4, comprises a clamping housing 24 (which may be in parts) and a carrying piece 25, which together completely enclose the finder parts and hold these in position for cementing, the rear finder member 7 being cemented at the same time in this case. Pins 23 are provided for holding the moulding tool 213 and the carrying piece 25 in position whilst cementing. Specification 958,029 is referred to.
GB2076160A 1959-06-13 1960-06-13 Process for the production of albada finders Expired GB958030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV16709A DE1172530B (en) 1959-06-13 1959-06-13 ALBADA viewfinder with mirroring device as well as method and device for its production

Publications (1)

Publication Number Publication Date
GB958030A true GB958030A (en) 1964-05-13

Family

ID=7575854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2076160A Expired GB958030A (en) 1959-06-13 1960-06-13 Process for the production of albada finders

Country Status (3)

Country Link
CH (1) CH383760A (en)
DE (1) DE1172530B (en)
GB (1) GB958030A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177342A (en) * 1985-06-27 1987-01-21 Man Technologie Gmbh Moulding a high quality surface on a workpiece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111426497B (en) * 2020-04-05 2021-04-30 新疆正通石油天然气股份有限公司 Casing buckling evaluation method in inclined shaft well cementation process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177342A (en) * 1985-06-27 1987-01-21 Man Technologie Gmbh Moulding a high quality surface on a workpiece
GB2177342B (en) * 1985-06-27 1989-05-10 Man Technologie Gmbh A method for producing components with accurate surfaces

Also Published As

Publication number Publication date
DE1172530B (en) 1964-06-18
CH383760A (en) 1964-10-31

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