← Back to Patent Explorer
US3834800A Expired / Lapsed US ⏱️ 0.0 years remaining

Projector viewer with indicating device

Assignee: DIETZEN CORP
•
Filing: 1973-04-30
•
Granted: 1974-09-10
•
Expires: 1993-04-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A projector viewer adapted to read microfiche transparencies through a projection onto a screen with an indicator device embodying a transparent sheet with index markings. A longitudinally flexible, laterally rigid transparent strip is connected to a carriage assembly which bears the microfiche between glass plates. The strip moves behind the transparent sheet and bears position indicating means coordinating the index markings with the respective frames of the microfiche.

Inventors

  • 👤 P Brownscombe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 06:23
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115; G03B21/116

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 158 words
A movable carriage assembly and position indicator therefor for a reader for a film having a plurality of image frames and held flatly between transparent plates comprising a base having a top wall and a front wall with a transparent sheet bearing index markings, a back panel behind and spaced from said front wall and defining with said front wall a narrow passageway movable, carriage means for said transparent plates mounted on the upper portion of said base for substantially planar movement of said plates, and a longitudinally flexible and laterally rigid strip attached at one end thereof to said carriage and extending across said top wall and into said passageway with the opposite end portion of said strip behind said transparent sheet to facilitate positioning of said carriage means for projection of a particular image frame of the film by noting the position of an indexing means on said opposite end portion relative to said index markings.
Claim 2
Dependent Claim 158 words
A movable carriage assembly and position indicator therefor for a reader for a film having a plurality of image frames and held flatly between transparent plates comprising a base having a top wall and a front wall with a transparent sheet bearing index markings, a back panel behind and spaced from said front wall and defining with said front wall a narrow passageway movable, carriage means for said transparent plates mounted on the upper portion of said base for substantially planar movement of said plates, and a longitudinally flexible and laterally rigid strip attached at one end thereof to said carriage and extending across said top wall and into said passageway with the opposite end portion of said strip behind said transparent sheet to facilitate positioning of said carriage means for projection of a particular image frame of the film by noting the position of an indexing means on said opposite end portion relative to said index markings.
Claim 3
Dependent Claim 31 words
An assembly as claimed in claim 1, said top plate and said back panel being connected by a rounded corner over which said strip passes in its movement in said passageway.
Claim 4
Dependent Claim 33 words
An assembly as claimed in claim 1, said strip comprising a row of side-by-side, rectangular, rigid, cross bars secured to a longitudinal, flexible strip extending along the bottom side of said cross bars.
Claim 5
Dependent Claim 185 words
A microfiche reader assembly comprising a base member having an upper support member with an aperture for projecting a light beam therethrough, carriage means mounted on said support member for movements in all directions in a plane perpendicular to the light beam relative to said support member, a pair of superposed transparent plates mounted on said carriage means for movement across said aperture, said transparent plates adapted to hold flatly therebetween a microfiche having a plurality of image frames in grid arrangement, a front wall on said base member including a backing plate and a front plate with a space therebetween, said front plate including a translucent or transparent panel having markings corresponding to said grid arrangement, a longitudinally flexible and laterally rigid strip attached at one end to said carriage means and extending into said space in the front panel behind said translucent or transparent panel, and said strip having position indicating means coordinating said markings with the respective frames of said microfiche, whereby said markings and indicating means can be useD to position said carriage means for projection of a desired image frame.
Claim 6
Dependent Claim 185 words
A microfiche reader assembly comprising a base member having an upper support member with an aperture for projecting a light beam therethrough, carriage means mounted on said support member for movements in all directions in a plane perpendicular to the light beam relative to said support member, a pair of superposed transparent plates mounted on said carriage means for movement across said aperture, said transparent plates adapted to hold flatly therebetween a microfiche having a plurality of image frames in grid arrangement, a front wall on said base member including a backing plate and a front plate with a space therebetween, said front plate including a translucent or transparent panel having markings corresponding to said grid arrangement, a longitudinally flexible and laterally rigid strip attached at one end to said carriage means and extending into said space in the front panel behind said translucent or transparent panel, and said strip having position indicating means coordinating said markings with the respective frames of said microfiche, whereby said markings and indicating means can be useD to position said carriage means for projection of a desired image frame.
Claim 7
Dependent Claim 31 words
As assembly as claimed in claim 4, said base plate and said back panel being connected by a rounded corner over which said strip passes in its movement in said passageway.
Claim 8
Dependent Claim 33 words
An assembly as claimed in claim 4, said strip comprising a row of side-by-side, rectangular, rigid, cross bars secured to a longitudinal, flexible strip extending along the bottom sides of said cross bars.

References Cited (Backward Citations)

US3560083A Cited
US3566524A Cited
US3718390A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-09 1978-03-11 1978-09-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-09 1982-03-11 1982-09-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-09 1986-03-11 1986-09-10 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag