Patent GB-231933-A (GB)
Title: Apparatus for attachment to photographic cameras whereby panoramic view photographs can be produced
IPC: G03B37/02
Filed: 1924-01-08
Abstract: 231,933. James, F. F. Jan. 8, 1924. Panoramic apparatus. - The camera, Fig. 1, without its back is secured to a housing 20 mounted on a circular revoluble base 6 and containing the film spools 83, 84, Fig. 5, the shutter 37 and the driving spring-motor 93, and means are provided for stopping circular travel of the housing after a pre-determined movement, consisting of a circular band 10, Fig. 10, mounted on the circular base 4 of the attachment, and co-operating with mechanism of the housing. The band 10 can be rotated for adjustment on the base 4 and is calibrated in inches and in degrees of a circle. A projection 76 on the band 10 is adapted to contact on completion of the movement of the housing 20 with a vertically movable rod 73 thereon to release a brake for stopping the motor 93. The take-up spool 84 is driven from the motor 93 through toothed wheels 101, 102, 104, 105, Fig. 4. One end of the spring 96 of the motor bears detachably against a pin 158 on the spindle carrying the wheel 101 so as to permit the spool 84 to be rotated independently of the motor by turning a knob 111 on the spindle 109, Fig. 13, which is first adjusted vertically by tipping a lever 115 by means of an adjustable screw 113, against the action of a spring 117, so as to bring the toothed wheel 110 out of gear with toothed wheel 112. Toothed wheel 112 is rotated bv the wheel 110 when the motor is operating to wind up the film, and engages with a circular rack 5 on the base 4 to cause the rotation of the housing 20. The storage spool 83 is geared to a governor 53 which is provided with a spring-pressed friction brake 51 which is released to allow operation of the mechanism by a Bowden wire release 54. The brake 51 re-engages on tipping of a retaining lever 45 by a pin 43 on the spindle of the shutter-roller 35, on release of the shutter at the completion of the exposure. An adjustable speed-regulating brake 57 is also provided on the governor. The shutter, in the form of an apertured blind 37, extends from the roller 35 to a spring controlled roller 36. The film 85 passes in front of an exposure aperture 21 in the housing 20 through a frame 22, the front 23 of which is hinged and can be pressed down against a spring 31 by a finger push 32 to enable the film to be threaded into position. In operation, the shutter aperture is first adjusted by turning a knob 41, Fig. 10, which winds the blind roller 35 through toothed wheels 44, 40, 42. The knob 41 and shutter are held at the required adjustment by the engagement in one of a series of holes 61, Fig. 11, on the wheel 44, of a pin 64 on a lever 63. The pin 64 and lever 63 are pressed upwards into engagement with the holes 61 against the action of a spring 69 by turning a knob 66 against the action of a spiral spring 80. The knob 66 is held in the engaged position by the engagement of a pin 68 on lever-arm 67 attached to spindle of knob 66 with a catch 71, Fig. 10, on a spring pressed lever 70 the other end of which engages with a cone 81 on' a rod 73, so that when the rod 73 is raised against the action of a spring 77 by contact of the projection 76 therewith on completion of the set movement, the cone 81 releases the catch 71 which causes release of the shutter 37 to terminate the exposure, and consequent release of the brake 51 to stop the movement of housing and film. Means are provided for adjusting the focusing mechanism of the camera to allow for the additional distance the film in the housing 20 is from the lens. The bottom plate 19, Fig. 2, of the housing 20 is secured to the plate 6 by a screw 13 which, when unscrewed to release the housing, enters a hole 11 in the base-plate 4 to prevent rotation of the plate 6. A pin 135 on the plate 6 is adapted to engage an aperture in the bottom plate 19 to enable the housing to be readily erected in position. A spirit level 132 is placed on the base-plate 6.