DE8524132U1 - Slide demonstration device - Google Patents

Description

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Patent-Treuhand- ^ Society

for electric light bulbs mbEL ·, Munich

Slide demonstration device

The innovation concerns a slide demonstration device with an upwardly open Mägäzifürigsbähn for recording differently designed magazine types and with engaging in the toothed transport strips of the magazines Switching means for the step-by-step transport of the magazines, the bottom surface of the magazine guideway is the support surface for a first type of magazine and wherein run-up ramps are provided for lifting the slides, which the support surface for a Form a second type of magazine and are provided with additional guide means.

Slide showers (slide viewers and slide projectors) are manufactured in various systems that each have their own magazine type. Some manufacturers rely on what is known as a standard magazine agreed that it should also be usable with the various demonstration devices. To the system magazine and to be able to demonstrate the standard magazine with the same device, corresponding designs have already been proposed which are designed to guide and transport two different types of magazines (DE-PS 31 18 032, DE-PS 28 49 362).

In order to be able to show slides with different thicknesses depending on the system, there is also a demonstration device been proposed, on the slide slide, a slider slidable and under the action of a spring can be attached (DE-PS 30 44 638).

The disadvantage here is that with a demonstration device of a certain system, only that for this system suitable and also the standard magazine can be used.

Thus, there is a societal need for a slide demonstration device in which more than two are different designed magazine types, in particular magazines from other systems can be used.

ΙΟ The aim of the invention is to meet this need and the creation of a slide demonstrator most of which are on the market Magazine types are usable, so that the consumer is not forced to choose a system once to stay, and in the event of a system change can keep the magazines used up to now.

This goal is achieved with a slide demonstration device of the type set out at the outset in that, according to the invention as a support surface for a third type of magazine in a known manner steps on the sides the magazine guide track are formed, the clear width of which is greater than the width of the magazine guide track is, and that a separate switching means is provided for each magazine type, with all switching means are coupled to a common drive.

In this way, a slide demonstration device is created in which not only the standard magazine, but also from This significantly different magazines of various other systems can be used.

In an advantageous further development of the innovation, the switching means can be used as a pinion in a manner known per se formed and mounted on a common shaft

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as well as with a switch actuated by a pawl be connected. The latch on the slide slide of the demonstration device can switch between two working positions be switchable mounted in order to transport the magazine forwards or backwards can.

It is also advantageous if a rider is arranged displaceably on the slide slide in a manner known per se and with the slide slide under spring action TO can be coupled, the slide slide having a resilient latching lug. This means that slides can also be included Frames are presented, which have a different thickness depending on the respective system.

The innovation is explained in more detail below with reference to a preferred embodiment that is shown in the Drawings is shown schematically; show it

Figure 1 shows a cross section through the magazine guide track of the slide demonstration device, with three different designed magazine types are indicated and the tab is shown;

FIG. 2 shows a part of this cross section on a larger scale, the switching means also being shown are and

Figure 3 shows a bottom view of the star switch and the

Pawl.
30th

Figure 1 shows a cross section through the magazine feed track 1 of the new slide demonstration device. The magazine guide track 1 has a bottom surface 2, which is the support surface for the so-called 35

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I Standard magazine type A (shown with full lines)

I educate.

a Ramps 3 and 3 rise from the floor area 2

I 5 4, which is used to lift the slides from the compartments of the

j; ' Magazines serve in a position in which the slides

I using the slide slider (in the plane of the drawing) in the

I slide channel can be transported. These ramp ramps 3,

j] 4 provide the support surface for a second one

1 10 Magazine type B (shown with dashed lines)

1, which is equipped with additional guide means 5 and 6

1 cooperates.
v.

; As a support surface for a third magazine type C (with

k 15 shown in dash-dotted lines), its width

I exceeds that of the magazine guide track 1 are

I trained on these stages 7 and 8, their clear

1 width adapted to the magazine width and therefore wider than

I is the magazine guideway 1. I 20

I The magazine types have in different places

I arranged toothed transport strips 9, 10 and 11

I (each indicated with a cross in Fig. 2), into the

> Switching means designed as pinions 12, 13 or 14

■ 25 intervene. The pinions 12, 13 and 14 sit on a common shaft 15, which is connected to a star wheel 16 are firmly connected. In particular, the pinions 12,

t 13, 14 and the star switch 16 as a one-piece component

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30th

The star switch consists of a disc 17 with downwardly protruding switch fingers 18 and is of a

j, pawl 19 shifted by one shift finger 18 at a time. The latch 19 itself is on the slide

35 slide 20 pivotably mounted and in two working

Positions (full or dashed lines in Fig. 3)
lockable, the forward or backward transport
of the magazine.

The right part of Fig. 1 shows that on the slide | i

the engaging end of the slide slide 20 to which a | Rider 21 can be coupled. The tab 21 is

in a longitudinal slot 22 of the slide slide 20 ver γ

slidably mounted. In the end area of the slide slide 20 ψ.

a resilient locking lug 23 is provided, the Ab- jg

stood from the face of the slide slide 20 of the |

Length of the tab 21 corresponds. During the demonstration I

thinner slides, which in narrow compartments one of the I

Magazine types are arranged, the tab \

21 at a distance from the end of the slide slide 20, whose \

Thickness corresponds to the compartment thickness. To the demonstration \

thicker slides, the tab 21 becomes at the end of the |

Eia slide 20 advanced, the locking lug 23 |

resiliently evades and engages behind the tab 21. |

The spring force is dimensioned in such a way that with normal |,

a functioning slide change of tabs 21 stuck 1

with larger forces (manually, but also with?

Malfunctions), however, the locking lug 23 yields j

and lets slide the rider 21 away. ί

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The innovation thus creates a slide demonstration device in which the majority of the commercially available magazine types can be used.

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Claims (3)

Protection claims 1. Slide demonstration device with an open top Magazine guideway for holding differently designed magazine types and with toothed transport strips the magazines engaging switching means for incremental transport of the magazines, whereby the bottom surface the magazine guideway is the support surface for a first magazine type and with ramp ramps are provided for lifting the slides, which form the support surface for a second type of magazine and are provided with additional guide means, characterized in that as a support surface for a third magazine type (C) in a manner known per se, steps (7, 8) on the sides of the magazine guide track (1) are formed whose clear width is greater than the width of the magazine guide track (1) and that a separate switching means is provided for each magazine type (A, B, C), with all switching means are coupled to a common drive. 2. Apparatus according to claim 1, characterized in that the switching means in a manner known per se as a pinion (12, 13, 14) and mounted on a common shaft (15) and with one of a pawl (19) actuated star switch (16) are connected. 3. Apparatus according to claim 2, characterized in that the pawl (19) is mounted on the slide slide (20) of the demonstration device such that it can be switched between two working positions.
30th 4 * device according to claims 1 to 3, characterized in that that on the slide slide (20) in itself , ■ I I tiii 1 I ■ I * · a known way a rider (21) is slidably arranged and under the action of a spring with the slide slide (20) can be coupled, the slide slide (20) having a resilient latching lug (23). 4 «4 * 44 ** t · HM f ti * «β» it li 4 * 44 «·« · · ■ «I 4 · Ι · <4 * ·