GB409300A - Improvements in or relating to optical projection apparatus - Google Patents
Improvements in or relating to optical projection apparatusInfo
- Publication number
- GB409300A GB409300A GB2984032A GB2984032A GB409300A GB 409300 A GB409300 A GB 409300A GB 2984032 A GB2984032 A GB 2984032A GB 2984032 A GB2984032 A GB 2984032A GB 409300 A GB409300 A GB 409300A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheel
- disc
- carrying
- cam
- gear
- 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
Links
Classifications
-
- 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
- G03B23/00—Devices for changing pictures in viewing apparatus or projectors
- G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
- G03B23/10—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier
- G03B23/105—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier disc carriers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
409,300. Clocks. NAYLOR, J. P., and NAYLOR, K. R., 57, Croxted Road, Dulwich, London. Oct. 25, 1932, No. 29840. [Class 139.] Optical-projection apparatus of the kind adapted to project the image of a timeindicating device such as a clock-dial and hands, or the hands alone, upon a screen simultaneously with the projection of pictorial matter is characterised in that the time-indicating device is actuated by a synchronous electric motor. As shown in Fig. 1, the synchronous electric motor A drives by means of the shaft B<1> and gear box BA, a shaft G carrying the slide carrier disc Q and a pinion BB meshing with an idler JK transmitting motion to the gear rings MN carrying the clock hands. The gear box BA carries a support BD holding a projection lens mechanism BE. The lamphouse BL contains a lamp BC, and a condenser BF is located in the heat insulating space BM provided between the walls of the lamp-house BL and the mechanism-house BK. The pictures are projected through a window BH in the door BJ. A fuse-box BN is provided, and the lamp-house has a hinged door BM<1>. As shown in Fig. 3, the motor A is coupled to a worm B engaging a worm wheel C coupled by the shaft DC to a pinion D meshing with a wheel E carrying a cam F loosely mounted as one unit with the wheel E on the spindle G. A spring H is attached to the cam F and the spindle G, the pins T of which engage a pallet U. The wheel E also meshes with idlers J and K, pivotally mounted on an arm L, which permits one or the other idler J, K to engage with the wheel E and the hand-carrying ring M to permit of the reversal of the rotation of the hand-carrying rings M, N. The rings M, N are supported by rollers I, the minute hand ring N being geared to the hour-hand ring M by a 12 to 1 gear train P. The hands O, O<1> are introduced into the optical beam so that an image thereof is projected. The slide carrier Q has a series of apertures R<1> provided with means to hold slides and is secured to the spindle G, the opposite end of which carries the disc S furnished with two series of pins T, T <1> on opposite faces thereof, which pins engage the pallets U, U<1> supported by the pivots AU and operatively connected by an arm V with a cam wheel F. Rotation of the wheel E causes rotation of the cam F to tension the spring H, a pin T presses on the pallets U and the cam F causes the arm V to move the pallet U through an angle sufficient to release the pin T, when the disc S rotates under tension of the spring H until arrested by the pallet U<1> engaging the next pin T <1>. Stepwise movement of the slide carrier Q is thus obtained. The electric lamp circuit is provided with a mercury switch W held by the carrier X, pivoted at X<1>, and having an arm Y engaging a cam AA driven by the hour hand ring M through the idler AC and gear wheel Z. A change speed gear mechanism may be provided. In a modification two electric motors are provided, one to drive the handcarrying gear rings and the pallets and the other to drive the scape disc and the slide-carrying disc. In another modification, one motor operates the time indicators and the other the slide-carrying disc, which is itself provided with the pins, dispensing with a separate scape disc, the operation of the two motors being entirely independent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2984032A GB409300A (en) | 1932-10-25 | 1932-10-25 | Improvements in or relating to optical projection apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2984032A GB409300A (en) | 1932-10-25 | 1932-10-25 | Improvements in or relating to optical projection apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB409300A true GB409300A (en) | 1934-04-25 |
Family
ID=10298047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2984032A Expired GB409300A (en) | 1932-10-25 | 1932-10-25 | Improvements in or relating to optical projection apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB409300A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3093030A (en) * | 1959-02-09 | 1963-06-11 | Carrillo Nestor | Slide projector with dissolve |
-
1932
- 1932-10-25 GB GB2984032A patent/GB409300A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3093030A (en) * | 1959-02-09 | 1963-06-11 | Carrillo Nestor | Slide projector with dissolve |
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