180 



Projection Apparatus and Accessories. 



No. 51015 



51024. .1:30. 



51 032. 1 : 8. 



o 



er 



Projection Screen, as Nos. 51,011 51,014, with device for rolling up, screen of heavy 

 construction. 



List No. 

 Size m 

 



51,015 



2x2 

 3. 10. 



51,016 



2.5x2.5 

 4. 15. 



51,017 



3x3 



6.0.0 



51,018 



4x4 

 9.5.0 



NEW. 



4x4 

 24. 15. 



frame, the larger 



screens 



Projection Screen with Metallic Surface, without device for rolling up. 



List No. 51,019 51,020 51,021 51,022 51 023 



Size m 1x1 2x2 2.5x2.5 3x3 



1.7.6 8.5.0 11.11.0 15.2.6 



The sizes up to 2 m length of side are supplied with fixed wood 

 having buckles and loops. 



51.024. Portable Bamboo Stand, Figure, with Projection Screen, size 2.4x2.4 m, of white 

 linen, in carrying bag; parts can be taken to pieces (Frick, Phys. T., Fig. 349) . . 



The stand can be reduced to 1.2 and to 1.8 m. 



51.025. - - do., with screen, 3x3 m, stand can be reduced to 1.2 m 



51.026. - - do., with screen, 4x4 m; stand can be reduced to 1.2 m 



51.027. Portable Bamboo Stand with Projection Screen for rolling up, -size 2.5x3 m ... 



51.028. Projection Screen with Stand for vertical adjustment (as suggested by Miiller, M. T.. 

 Fig. 122) 



51.029. Automatic Cord Winder, which winds up the cord hanging down when the screen 

 is rolled up 



51.030. Projection Screen with Electric Device for Rolling up, F i g u r e, with prepared 

 screen, 3x3m white surface, surrounded by a 25 cm wide black border; with 110 volt 

 D. C. Motor and wood protecting cornice; without ceiling fastening or tilting device 



The driving motion is effected by means of an electric motor with worm gear fitted on a wall 

 bracket. The device can be controlled from any part of the room simply by putting the motor in circuit 

 by a hand reversing switch, which, together with the fuses, is placed on a marble slab on the wall. 

 The motor is automatically put out of gear at the two extreme positions of the screen by means of 

 a cut out. 



The arrangement is supplied for Three Phase Current at an extra price of 1. 



The roof fixture illustrated differs in each case according to the varied conditions prevailing on 

 the spot and must therefore be specially estimated for. 



51.031. Tilting Device, consisting of 2 iron weights and 2 spiral springs, cf. Figure . . 



s. d. 



3. 0.0 



4. 0.0 

 6. 0. 

 6. 0.0 



0.16.0 

 0. 5.0 



30.10.0 



Q 



I 



Q 



CO 



>-s 



3 







1. 5. 



Cl 5349. 2B9. 



