GB2154025A

GB2154025A - An assembly of slide-holders for projection of slides

Info

Publication number: GB2154025A
Application number: GB08403700A
Authority: GB
Inventors: Hiroshi Hara
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-02-13
Filing date: 1984-02-13
Publication date: 1985-08-29
Also published as: GB2154025B; GB8403700D0

Abstract

Elongated slide-holders (10 ... 11) each having windows (24) in front and rear faces are connected together by tongue-and-groove joints (12, 13). The holders are open at their upper edges to receive slides in numbered compartments: notches (26) assist removal of the slides. Internal abutments in each compartment serve to retain each slide securely. At one end of the assembly is a pair of cards (15, 16) on which details of the slide collection may be put; the end member (14) is detachable at a tear joint (17). <IMAGE>

Description

SPECIFICATION An assembly of slide-holders for projection of slides This invention relates to a photographic projection slide-holder assembly comprising a plurality of slide-holders detachably connected to each other and an exchange card member detachably connected to or integrally moulded with one of the holders.

There have been proposed and used a variety of photographic slide (transparency) holders.

One prior type of slide-holder comprises an elongated body which is divided into ten spaced slide-receiving compartments arranged in the longitudinal direction thereof and having serial numbers in a predetermined order impressed thereon. When the slide-holder is to be used for projection to an audience, slides having corresponding serial numbers in a predetermined order assigned thereto are inserted into the respectively corresponding compartments by a lecturer or his attendant and the slide-holder with slides received in the compartments may be temporarily placed in an usher's custody prior to display by being fed through the projector. However, if the slide-holder is casually turned over or tilted, the slides tend to slip out of the respective compartments, and it is tedious to rearrange the slides in the original order and then return them to their proper compartments.

The slide-holder of this type for use in a "magic lantern" projector is produced by forming each ten of upper and lower through openings or windows in vertically aligned and spaced relationship in an elongated cardboard body, with each set of upper and lower openings being equally spaced from the longitudinal axis of the cardboard, positioning cardboard frame pieces to surround the openings, gluing the frame pieces in their positions and folding the cardboard body along the longitudinal axis into two half portions and then gluing the half portions together to thereby provide ten compartments for receiving the corresponding number of slides.However, this conventional slide-holder has the disadvantage that since the slides are merely inserted into the open tops of the compartments and no means for firmly holding the slides within the compartments is provided, the slides frequently slip or spring off the compartments when the holder is turned over or tilted.

Furthermore, the conventional slide-holder having 10 compartments arranged in laterally spaced relationship has the disadvantage that since the body of the holder comprises an elongated single piece of cardboard, after the projection of the slides, the holder is inconvenient to carry it about and since the slides are removed from the compartments after projection and the holder is then discarded, the conventional slide holder is inconvenient and uneconomical.

Therefore, the present invention is to provide a novel and improved slide holder assembly which effectively eliminates the disadvantages inherent in the conventional magic lantern slide holder.

A principal object of the present invention is to provide a slide-holder assembly which can be easily stored and carried about and reused, and which is easily identified when different slides are to be projected successively by a series of lecturers.

According to the present invention, there is provided a magic lantern slide-holder assembly as defined in the claims.

The invention will be more readily apparent from a reading of the following detailed description in conjunction with the accompanying drawings which show preferred embodiments of the invention, and wherein: Fig. 1 is a perspective view of a first embodiment of the slide-holder assembly of this invention with a portion thereof broken away; Fig. 2 is an exploded fragmentary plan view on an enlarged scale of the slide-holder assembly shown in Fig. 1, especially showing the connection between the two slide-holders in the assembly; Fig. 3 is a longitudinal sectional view of the connection shown in Fig. 2; Fig. 4 is a fragmentary plan view on an enlarged scale of portion of one of the two slide holders in the slide-holder assembly of Fig. 1, especially showing the exchange card member detachably connected to one end of the one holder; Fig. 5 is a longitudinal sectional view of Fig. 4;; Fig. 6 is a fragmentary perspective view on a further enlarged scale of one of the compartments provided in each of the two slide holders; Fig. 7 is a vertical sectional view of Fig. 6; Fig. 8 is a fragmentary plan view of a second embodiment of the slide-holder assembly of this invention; Fig. 9 is a longitudinal sectional view of Fig. 8; Fig. 10 is a perspective view of a portion of Fig. 8; and Fig. 11 is a vertical sectional view of Fig.

10.

The present invention will be now described referred to the accompanying drawings and more particularly, to Figs. 1 to 7 thereof in which the first embodiment of the projection slide-holder assembly of this invention is shown. The slide-holder assembly generally comprises elongated first and second slideholders 10 and 11 which are formed of the same synthetic resin material and detachably connected together by means to be described hereinafter. The first and second slide-holders 10 and 11 are detachably connected together at one end or the inner ends thereof by means of a tongue-and-groove joint which comprises a tongue 1 2 formed on the inner end face of the first slide-holder 10 and a groove 1 3 formed on the inner end face of the second slide holder 11.The tongue 1 2 does not extend along the full width of the inner end face of the holder 10, but terminates short of one edge of the inner end face of the associated holder and similarly, the groove 1 3 does not extend along the full width of the inner end face of the holder 11, but terminates short of the corresponding edge of the inner end face of the associated holder so that the two slideholders 10, and 11 can be properly jointed together and held in their assembled position.

An exchange card member 14 is detachably connected at one end to the other or outer end of the first slideholder 10 and comprises a custodian's card 1 5 and a depositor's card 1 6 which are separably connected together by means of a tear line 1 7 formed of spaced thinned areas. The exchange card member 14 is formed of the same synthetic resin material as that of which the first and second slideholders 10 and 11 are formed and detachably connected to the outer end of the first holder 10 at the tongue-and-groove joint 1 8 and 1 9 which comprises the tongue 1 8 and groove 1 9 formed on the adjacent or opposing end faces of the card member and holder, respectively.The tongue and groove 18 and 1 9 do not extend along the full width of the card member and holder, respectively, for the same purpose as that described in connection with the tongue-and groove joint 1 2 and 1 3 connecting between the slide holders 10 and 11 hereinabove. The custodian's card 1 5 and depositor's card 1 6 bear the subject of a lecture contained in slides held in the slideholder assembly, the name and affiliation of the depositor or lecturer, the name of the custodian and the number of slides held in the assembly, for example, which may be impressed on the cards when the exchange card member 14 is moulded.

The first and second slide-holders 10 and 11 are similar to each other except for the tongue-and-groove joints 12, 1 3 and 18, 1 9 and thus, only the first slideholder 10 will be in detail described with the understanding that the same can be equally applied to the second slide-holder 11. The slide-holder 10 comprises an elongated framework which consists of front and back sheets 20, 21 secured together at the thickened opposite ends and the lower edges by means of suitable adhesive, for example. A plurality of partitions 22 integrally project in a uniformly spaced relationship in the length of the sheet from the front surface of the rear sheet 21 to the front sheet 20 and extend vertically to define a plurality of uniformly spaced compartments 23 which are open at the tops.An opening 24 is provided in the front sheet 20 between each two adjacent partitions 22 and the back sheet 21 is also provided with the corresponding number of openings 24 in alignment with the openings in the front sheet 20 to thereby form windows in the front and back surfaces.

A serrated vertical slide abutment projection or projections 25 are formed on the inner surface of the back sheet 21 adjacent to one side or the opposite sides of each of the openings 24 with the serrated front surface or surfaces being spaced from the inner surface of the front sheet 20 by a distance slightly less than the thickness of the frame of a projection slide S so that the slide S can be firmly held within the associated compartment 23 against inadvertent slipping out of the compartment even when the slide holder assembly is turned over or tilted. Arcuate notches 26 are formed at the upper edges of the front and back sheets above the openings 24 so that the projection slides S can be easily inserted into and removed out of the compartments 23.

I refer now to Figs. 8 to 11, in which the second embodiment of the slide-holder assembly of this invention is shown. In the second embodiment, the parts coresponding to those of the first embodiment are assigned the same reference numerals thereto. The second embodiment is substantially similar to the first embodiment and thus, the second embodiment will be described only as to the parts different from the corresponding parts of the first embodiment. The exchange card member 1 4a is integrally moulded with the first slide holder 10 and connected to the holder by a second tear line 1 7a formed of spaced thinned areas.A serrated vertical slide abutment projection or projections 25a are formed on the inner surface of the back sheet 21 adjacent to one side or the opposite sides of each of the openings 24 with the apices thereof being spaced from the inner surface of the front sheet 20 by a distance slightly less than the thickness of the frame of a slide S so that the arcuate projections yieldingly abut against the slide to prevent the slide from inadvertently slipping out of the associated compartment 23. The remaining parts of the second embodiment are similar to the corresponding parts, and description of such parts will be omitted herein.

With the above-mentioned construction and arrangement of the parts of the projection slide-holder assembly of this invention, in use of the first embodiment, the lantern slide holders 11 and 1 2 are first connected together at their inner ends by means of the tongue-and-groove joint 12, 1 3 and the custodian's card 15 is connected to the outer end of the holder 10 by means of the tongue-andgroove joint 1 8,1 9. Thereafter, the slides S having serial numbers in a predetermined order are inserted in to some of or all the compartment 23 having the corresponding serial numbers in the predetermined order, respectively, whereupon the slides are firmly held within the compartments by the serrated slide abutment projections 25 against inadvertent slipping out of the compartments 23.

When the slides are not used, the projection slide-holder assembly is stored in a case in its disassembled condition. When a lecture meeting is to be held with projection of the slides the lecturer carries the cased slide-holder assembly with him to the place of the lecture meeting. The lecturer himself disconnects the exchange card member 14 from the first slide holder 10 at the tongue-and groove joint 18, 1 9 and then tears the depositor's card 1 6 off the custodian's card 1 5 at the tear line 1 7.

The slide-holder assembly with the exchange card member removed therefrom is placed in a case. The lecturer carries the depositor's card 1 6 with him and delivers the filled case and custodian's card 15 to an usher at the usher's desk in the place of the lecture meeting and the usher in turn attaches the custodian's card 1 5 to the case. The filled case having the custodian's card 1 5 attached thereto is then delivered by the the usher to a custodian who writes his name on the custodian's card and keeps the case until the lecturer's turn for lecturing comes. When his turn comes, the lecturer shows his depositor's card 1 6 to the custodian to receive the case and delivers the filled case to a projection equipment operator.Before the slides S are projected, the disassembled first and second slide holders 10, 11 are taken out of the case and connected together at the joint 12, 1 3 whereby the slides are ready for projection.

The subject of the lecture, the name and affiliation of the lecturer and the number of slides may be written previously or at the time of delivery to the usher on the depositor's and custodian's cards 15, 1 6 by the lecturer.

After the projection of the slides S, the first and second holders 10, 11 are disconnected at the tongue-and-groove joint 12, 1 3. As is clear from the foregoing description, when the slides S are once inserted into the corresponding compartments 23, the slides will not inadvertently slip out of the compartments even when the holder assembly is turned over or tilted, to thereby ensure safe use of the slides.

The operation of assembling the slide-holder assembly can be easily and efficiently performed. And since the exchange card member 14 comprises the custodian's and depositor's cards 15, 1 6 which are detachably connected together at the tear line 17, the slide-holder assembly can be easily used at the place of a lecture meeting or the like. Furthermore, when not used, since the parts of the holder assembly can be simply disconnected from each other to thereby reduce the size of the holder assembly, the holder assembly can be conveniently stored and carried about. Finally, since the slide holders and exchange card member are formed of the same synthetic resin, the parts are suitable for mass production at low cost and are free of permanent deformation and/or bending which are inherent disadvantages of the conventional slideholders formed of cardboard.

The second embodiment of the slide-holder assembly of this invention is used substantially in the same manner as the first embodiment except that the custodian's card 1 5 is permanently separated from the first slide holder 10 and the arcuate slide abutment projection 25 yieldingly hold the slide S within the associated compartment 23 against inadvertent slipping out of the compartment.

The second embodiment can be produced at an expense less than that of the first embodiment because the exchange card member 1 4A is integrally moulded with the first slideholder 1 0. Although the custodian's card is permanently separated from the slide-holder, there is little possibility of loss of the card because the component is placed in the same case where the other components of the slide holder assembly are also placed when the assembly is not used.

While the invention has been described with reference to the preferred embodiments thereof, it will be understood that various changes may be made therein without departing from the scope of the invention.

Claims

1. A photographic slide-holder assembly comprising an elongated first slide-holder having a plurality of open top slide-receiving compartments arranged in spaced relationship in the longitudinal direction of said holder, an elongated second slide holder detachably connected at one end to one end of said first slide-holder and having the corresponding number of open top slide-receiving compartments arranged in laterally spaced relationship in the longitudinal direction of said second slide-holder and an exchange card member detachably connected to the other end of said first slide-holder and including a custodian's card and a depositor's card separably connected on the adjacent edges of the cards.

2. A slide-holder assembly as claimed in Claim 1, wherein said first and second slideholders are detachably connected at one end thereof by tongue-and-groove joint means.

3. A slide-holder assembly as claimed in Claim 2, wherein said tongue-and-groove joint comprises a tongue and a groove formed at the adjacent ends of said first and second slide-holders, respectively.

4. A slide-holder assembly as claimed in Claim 1, 2 or 3, which includes a serrated vertical slide abutment member provided within each of said compartments adjacent to at least one side of the compartment for abutting against a slide to be received in the compartment and to firmly hold the slide in the compartment.

5. A slide-holder assembly as claimed in Claim 4, wherein serrated vertical slide abutment members are provided within each of said compartments adjacent to the opposite sides of the compartment.

6. A slide-holder assembly as claimed in Claim 4, wherein said tongue-and-groove joint comprises a tongue and a groove formed at the adjacent ends of said exchange card member and said first slide holder, respectively.

7. A slide-holder assembly as claimed in any of Claims 1 to 6 wherein said exchange card member is detachably connected to said other end of the first slide-holder by tongueand-groove means and said custodian's card and depositor's card are separably connected by a tear line.

8. A slide-holder assembly as claimed in any preceding Claim, wherein each of said first and second slide-holders comprises elongated parallel front and back sheets of a synthetic resin, spaced from each other except at the opposite ends and on the opposite sides of each of said compartments.

9. A slide-holder assembly as claimed in any of Claims 4 to 8, wherein said back sheet includes laterally spaced partitions integrally formed thereon and forwardly extending therefrom to said front sheet to define said compartments and said slide abutment members are integrally moulded with the back sheet and extend forwardly extending therefrom towards said front sheet by a distance. slightly less than the thickness of the frame of said slide.

10. A slide-holder assembly as claimed in any of Claims 1 to 5 wherein said exchange card member is moulded with said first slideholder and separably connected to the first slide holder by a tear line.

11. A slide-holder assembly as claimed in Claim 6 or 10 wherein said tear line comprises separate thinned areas formed on said exchange card member.

1 2. A slide-holder assembly as claimed in Claim. 1, 2 or 3, which includes an arcuate vertical slide abutment member provided within each of said slide-receiving compartments adjacent to at least one side of the compartment for yieldingly abutting against the lantern slide received in the compartment to firmly hold the slide in the compartment.

1 3. A slide-holder assembly as set forth in any one of Claims 9 to 12, wherein said arcuate vertical slide abutment member is integrally moulded with said back sheet and extends forwardly therefrom towards the front sheet with the apex thereof being spaced from the front sheet by a distance slightly less than the thickness of the frame of said slide.

14. A slide-holder assembly as claimed in any of Claims 8 to 1 3 wherein said front and back sheets are formed of synthetic resin.

15. A slide-holder assembly as claimed in any preceding Claim, wherein said front and back sheets are provided with openings in alignment with each other at said compartments in the front and back sides,

1 6. A slide-holder assembly as claimed in any preceding Claim, wherein each of said compartments includes an arcuate notch at the upper edge of the compartment.

1 7. A slide-holder assembly, substantially, as hereinbefore described with reference to or as shown in, any of Figures 1 to 7 or 8 to 11 of the drawings.