DE7818601U1 - PROJECTOR WITH A MAGAZINE GUIDE AND WITH A STEPPING REAR DERAILLEUR - Google Patents

Description

AG FA-GEVaERT-AG

levebkusen

oamera factory in Munich

(• AT "NTA" TBILUN "

G 78 18 601.3 10-eh-ro CW 2171.6 MP

4915A

Projector with a magazine guideway and with a stepping mechanism

The invention relates to a projector with a magazine guide track and with an indexing mechanism for the transport of longitudinal magazines with different step lengths, two ring gears of different pitch circle radii protrude into the magazine guide track and one of the ring gears each can be brought into engagement with a toothed strip provided on a magazine of the assigned step length.

To prevent the magazine from tilting or tilting during magazine transport To avoid this, longitudinal guides must be provided for the magazine. These exist with known projectors for known magazines from the side projecting into the magazine guideway guide approaches that the upper edge one on the side, only over part of the slide frame

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reach over the high magazine wall along part of the magazine length. These longitudinal guides are for a proposed magazine type according to the. Patent 28 17 005 is no longer sufficient. There is also the problem that the guideway for receiving and guiding the magazine of the known magazine type as well as the magazine of the proposed magazine type should be suitable and that the indexing mechanism for moving the magazines dor different Magazine types around this own, different step lengths should be usable in an uncomplicated way.

For example, from DE-PS 12 79 964, a slide projector has become known in which the magazine forward pinion has two coaxial ring gears with different pitch radius, one of which with the gear teeth the magazine of one magazine type and the other with the switching teeth of the magazines of another magazine type automatically engages when inserting a corresponding magazine to inevitably achieve the correct one Switching step of the magazine used. Special guides for the different switching steps that require Magazines against tilting or tilting as a result of the gear forces or the slide changing slide as a whole Moments occurring on the magazine were not provided for here.

The invention is therefore based on the object of designing a projector of the type mentioned in such a way that both these proposed magazines according to patent 28 17 005 as well as the known magazines can be guided with sufficient accuracy and can be advanced by the same stepping mechanism by the respectively different switching steps.

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According to the invention, this object is achieved by the features of Main claim solved. The subclaims contain for the management and switching of the different magazines advantageous features.

Details of the invention emerge from the following description in which an embodiment of the invention wire! explained using the drawing. In the drawing shows

Fig. 1 is a partial sectional view through the magazine guide shaft of the projector, in which a longitudinal magazine conventional design is used;

FIG. 2 shows a sectional view corresponding to FIG. 1, with a longitudinal magazine correspondingly in the guide shaft the earlier proposal of the applicant is used, which due to the design of the invention Projector is transported with shorter stride lengths;

3 shows a partial section through the stepping mechanism corresponding drive pinion, and

FIG. 4 shows an end view of the drive pinion according to FIG Fig. 3.

1 and 2 is a cross-sectional view of the projector 1 in the region of the magazine guide shaft or the Magazine feed track 10 shown. Two frame ramp ramps 11a and 11b jump from the bottom of the guide shaft 10 to the top before that in conventional longitudinal magazines 2 (Fig. 1) with compartments formed by magazine side walls

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the slide frame on the suitable vertical position for projection in the projection stage, not shown, and above the upper edge of the projection stage facing the short Lift the front wall 12. The magazine 2 slides with guide runners on the floor 13 or arranged on this flat guide surfaces. Laterally in the magazine guide shaft 10 engaging guide lugs 14 that the upper edge overlap the short end wall 12, secure the magazine 2 inserted in the guide shaft against falling out and removal towards the top. In this respect, the new projector is the same as conventional projectors.

In the magazine guide track 10 of the projector 1 is a drive pinion (15) stored, which via suitable switching elements, not shown in the drawing, from the stepping mechanism is driven and with each image change by a certain angle of rotation corresponding to a switching step is transported further. The axis 16 of the drive pinion 15 runs normal to the bottom surface 13 of the magazine guide shaft 1, i.e. also normal to the guide plane of the magazine,

The drive pinion 15 is shown in FIGS. 3 and 4 in partial longitudinal section and in an end view. It is provided with two concentric, axially offset toothed rims 17 and 17, which have different pitch circle radii r 1 and r 1 according to the intended step lengths. The pitch circles or pitch circles t 1 and t 1 are shown in FIG. Both ring gears 17 and 18 have the same number of teeth, the number of teeth being selected so that the pinion 15 with the ring gears 17 and 18 is advanced by one tooth at every switching step. The ring gear 17 with the larger pitch circle radius r is formed on the side of the drive shaft 19 and the other _{ring gear 18 with the smaller pitch circle radius r 2} on the free end of the pinion 15.

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As can be seen in Fig. 1, the ring gear 17 is _{in engagement with the larger pitch circle radius r 2} in the guide shaft 10 with a toothed strip 20 formed on the underside of the (conventional) magazine 2, so that when the pinion 15 is rotated by one tooth spacing corresponding circular arc of the magazine 2 is transported by a relatively large switching step. The end of the pinion 15 carrying the second ring gear 18 protrudes next to the ramp 11a into a groove-like recess 22 of the magazine 2. The pinion 15 ends slightly below the ramp surfaces of the ramp 11a and 11b, so that there is the lateral displacement of a slide frame for the purpose of changing images not disabled.

In Fig. 2 the same projector as in Fig. 1 is shown with a special magazine 2 ¹ , in which slide frames provided with profiled edges according to the earlier proposal of the applicants are mounted in direct side-by-side arrangement in the direction of the arrow A to change images. The magazine 2 'engages with outwardly projecting parallel guide ribs 23, 24 in guide grooves 25, 26 (FIG. 1) which are formed on the opposite lateral boundary walls of the guide shaft 10. In this magazine 2 ¹ , the lower toothed ring 17 with the larger pitch circle radius r is ineffective, while the upper toothed ring 18 is in engagement with a matching toothed strip 20 'on the underside of the magazine 2'. From the toothing laws it follows that the switching step lengths of the slide magazine 2 'driven by the toothed ring 18 and of the slide magazine 2 driven by the toothed ring 17 are in the ratio of the pitch circle radii r_ / r. The sequencer drives this with every change of image

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Pinion 15 always at the same speed and rotates the pinion through the same angle. The one over the rack Step length 20 or 20 'transferred to magazine 2 or 2' depends on which gear rim (17 or 18) is effective with engagement with the associated rack of the magazine.

Instead of the two ring gears for two different step lengths provided in the exemplary embodiment described, several, for example three ring gears can be arranged on a pinion, the pitch circle diameter gradually decreasing towards the free end of the pinion 15. The design of the magazines interacting with the lowest and uppermost toothed rings corresponds to those of the magazines 2 and 2 'as shown in FIGS. 1 and 2. The magazine interacting with the middle toothed ring preferably has the guide elements 23, 24 of magazine 2 ¹ and also has a recess similar to the recess 22 of the magazine 2, in which on the one hand the ramp 11a and on the other hand the ineffective upper toothed ring of the pinion 15 can engage.

Claims (6)

AG FA-G-fes / A & R ^ -ÄG LEVERKUSEN OAMERA-WERK Munich G 78 13 601.3 10-eh-ro CW 2171.6 MP 4915A Expectations Projector with a magazine guide track and with an indexing mechanism for the transport of longitudinal dial magazines with different step lengths, two gear rims of different pitch circle radii project into the magazine guide track and one of the gear rims can be brought into engagement with a toothed strip provided on a magazine of the assigned step length, characterized in that magazines (2) of the one magazine type (2) on the floor (13) or on guide surfaces of the magazine guide track (10) arranged thereon and that in the walls laterally delimiting the magazine guide track (10) a parallel, spaced from the floor (13 ) the magazine guide track (10) arranged guide plane (25, 26) is provided for magazines (2) of the other magazine type (2 '). • ff Il CW 2171.6 MP - 2 - 2. Projector according to claim 1, characterized in that. ^x in the walls laterally delimiting the magazine guide track (10) parallel guide grooves (25, 26) arranged at a distance from the bottom (13) of the magazine guide track (10) are provided for engaging with the magazine long sides of the magazines (2 ¹ ) of the other magazine type ( 2 ¹ ) protruding guide ribs {23, 24). 3. Projector according to claim 2, characterized in that in addition the guide grooves (25, 26) laterally in the magazine feed track (10) projecting guide lugs (14) are provided for engaging over a lateral magazine wall (12) of a magazine to be inserted (2) of the one Magazine type (2) or the upper edge of a guide rib (23) of a magazine to be inserted (2 ¹ ) of the other magazine type (2 ¹ ). 4. Projector according to one of the preceding claims, characterized in that the axis of rotation (16) of the ring gears (17, 18) runs normal to the bottom surface (13) of the magazine guide track (10) and that the ring gear (18) with the small pitch circle radius (r_) further from the bottom surface (13) into the magazine feed track (10). • stands. 5. Projector according to claim 4, characterized in that the ring gear (18) with a small pitch circle radius (r ") based on the bottom surface (13) of the magazine feed track (10) is lower than the surface of the lifting the slide frame in a magazine (2) of a magazine type (2) serving ramp (lia). Il suffered f · · · It t (I * IL C tt · 1 I <(It < I < I Cl (t I « 4 It <(I (C CW 2171.6 MP 6. Projector according to one of the preceding claims, there- 'characterized in that the ring gear (18) with small Pitch radius (r ^) is arranged such that it is at Use of magazines (2) of one type of magazine (2) is located in a groove-like recess (22) of the same. For this purpose 2 sheets of drawings