Patent GB-190719779-A (GB)
Title: Panorama Camera
Inventor: CASE WILLIAM ARTHUR
Filed: 1907-09-04
Granted: 1908-03-19
Abstract: 19,779. Case, W. A. Sept. 4. Optical instruments. - In a panoramic camera having the lens system and shutter in a revolving turret and the roll film mounted outside and around the turret, stops are used to limit the rotation to any part of a complete cycle with devices to indicate the correct winding of the film and also the exposure which depends on the strength of the spring actuating the clock-work driving the turret. The main spindle 6, Fig. 1, of the clockwork is fixed by a set-screw 18 to the turret which carries a light-sheath 20, two lenses 36, 37, and two forty-five degree prisms 38, 39 forming the lens system ; there are arrangements for focusing such as a screwed cylinder 32 working in a nut 28 kept down by a screw 31 entering a groove in the nut through the sleeve 27. The lens 36 is adjustably mounted in front of an iris diaphragm at 40 and with its axis coinciding with the axis of a viewfinder lens 43, and attached to the lens mounting is a leg 33 with a stop 33', marks on the leg indicating the focal distance corresponding to that position of the lens holder. The shaft 20, Figs. 2 and 16, is closed by a shutter 58 having a yielding pad 58<1>, and working round a pin 61, Fig. 14. This shutter is normally held open by a spring 62 and is locked in that position by a pin 63 engaging a blade 65 on the shutter. The pin 63 is normally held down by a spring and, when up, has a pin 69 engaging a projection 70 on an extension of the hinge bracket and also a pin 71 fitting in a slot 58<11> of the shutter so that the latter, on revolving, throws the pin 63 off its catch 70, allowing it to spring home. The extension also carries a pin 54 fitting through the top and at the bottom engaging holes 56 in the clock-work case to secure the turret against rotation. The shutter carries an arm 74 engaging with the ordinary starting and stopping mechanism shown in Fig. 17 or with the special stop shown in Fig. 18, in which a handle 86 working in a groove 87 is attached to a slide 84 carrying also a cutting-tooth 85 designed to recess the film 22 to enable a spring-held roller 90, Fig. 20, to enter and draw down a pin 89 serving to show when the exposed part of the film has been wound up. The bulb plunger acts on a lever 78, Fig. 17, working in a plate 73 attached to a ring 11 of the stationary frame, the lever 78 actuating the plate 76 carrying a pawl 75 acting on a lever 72, which allows the arm 74 to pass, the releasing of the lever 78 resetting the lever 72 which catches the arm 74, thus closing the shutter and releasing the pin 63 which locks the shutter in its closed position. The shutter carries a rigidly hinged ground glass screen 96, Fig. 16, for use in focusing a single object, the outer case and films being first removed. The outer case is composed of a cover 8, Fig. 1, preferably contained within a leather cover 8<1> and attached to two rings 11, 11<1>, the latter being rotatably secured to the part 3 of the base by slotted pins 13 prevented from being wholly withdrawn, while the cover 8 is secured to a base 1 by pins 7 having a shoulder engaging in an enlarged end of a curved slot in the cover. Attached to the rings 11, 11<1> are rings 24, 26 to guide the film round the turret, the ring 26 having projections 26<1>, Fig. 2, to assist in guiding the film and to enable the film to be taken hold of between them. A light-tight ring 23<1> is secured on top of the casing and has a mark 52, Fig. 4, opposite a similar mark on the turret to indicate its normal position. The turret carries anti-friction wheels 51, Fig. 22, and a partly toothed wheel 91 engaged by a projection 92 on the casing, with an indicator to mark the time exposure depending on the amount of the winding of the spring, a stop 93 preventing over-winding or running down. The films 47, Fig. 2, are carried in spools 47<1> mounted on pivots 49 enabling them to be swung out of the casing for loading or unloading, and, for taking single objects, the film rolls are preferably made of films alternating with sheets of backing, and recesses are cut on top to indicate when the film is exposed and again when it is unexposed. The camera has tripod attachments at 9, 2, Fig. 1, and levels at 10, 53, Fig. 4, for vertical and horizontal working.