Abstract A slide tray and projector in which the tray has a circular compartmented body member for receiving slides and a slide retaining member or disc carried by and rotatable relative to the body member. When the slide tray is mounted on a projector, the slide retaining disc is held in a fixed position relative to the projector with an opening in the retaining disc aligned with the projector''s slide projection gate. A plurality of pins on the body member are engageable by a rib on the projector for indexing the body member in forward and reverse directions. The pins are also engageable by a tray locking projection on the projector to precisely locate selected slide compartments in registry with both the opening in the retaining disc and the slide projection gate. A detent mechanism is provided for preventing rotation of the body member from a predetermined position relative to the retaining disc, and the detent mechanism is disengaged by a lever connected to the tray locking projection during the first operation of the indexing mechanism to permit movement of the body member relative to the retaining disc. In any other position of the body member relative to the retaining disc, the detent mechanism is ineffective to prevent rotation between the body member and the disc.
Inventors
👤 M Dipietro
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-06 18:23
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
260 words
A slide tray for use with a slide projector having (1) a slide projection gate, (2) a locating member, (3) means for indexing a received slide tray, and (4) a locking member movable between first and second positions; said slide tray comprising: a circular body member having (1) radially spaced, annular, inner and outer walls and (2) spaced, radial separator walls connecting said annular walls to define compartments for receiving slides; a circular retaining disc rotatably connected to said body member and cooperating therewith to releasably hold slides in said compartments, said disc defining a radial opening alignment with one of said compartments at a time for passage of a slide to and from said one compartment; means on said disc engageable by said locating member for preventing rotation of said disc relative to the projector; a plurality of pins on said body member, said pins being alternately engageable by (1) the indexing means to rotate said body member to align successive compartments with said gate and (2) the locking member in its first position to prevent rotation of said body member; and detent means including (1) a radial notch on said body member and (2) a wire spring having a first portion fixed to said disc and a second portion spring urged for movement into said notch when said body member is in a single, predetermined angular alignment with said disc, said wire spring being engageable by said locking member during movement thereof from its first to its second position for moving said second portion out of said notch.
Claim 2
Dependent Claim
260 words
A slide tray for use with a slide projector having (1) a slide projection gate, (2) a locating member, (3) means for indexing a received slide tray, and (4) a locking member movable between first and second positions; said slide tray comprising: a circular body member having (1) radially spaced, annular, inner and outer walls and (2) spaced, radial separator walls connecting said annular walls to define compartments for receiving slides; a circular retaining disc rotatably connected to said body member and cooperating therewith to releasably hold slides in said compartments, said disc defining a radial opening alignment with one of said compartments at a time for passage of a slide to and from said one compartment; means on said disc engageable by said locating member for preventing rotation of said disc relative to the projector; a plurality of pins on said body member, said pins being alternately engageable by (1) the indexing means to rotate said body member to align successive compartments with said gate and (2) the locking member in its first position to prevent rotation of said body member; and detent means including (1) a radial notch on said body member and (2) a wire spring having a first portion fixed to said disc and a second portion spring urged for movement into said notch when said body member is in a single, predetermined angular alignment with said disc, said wire spring being engageable by said locking member during movement thereof from its first to its second position for moving said second portion out of said notch.