Patent GB-191217536-A (GB)
Title: Improvements in Target Apparatus for use with Kinematographs.
Inventor: BATES BENJAMIN WILLIAM
IPC: F41J9/14
Filed: 1911-12-27
Granted: 1913-03-27
Abstract: 17,536. Bates, B. W., Kelly, H. W., and Corbin, D. H. Dec. 27, 1911. [Cognate Application, 17,537/12.] Targets.-Relates to kinematograph target apparatus in which sound - waves from a rifle enter a receiver connected with electric controlling- apparatus as described in Specifications 29,083/11 and 15,031/12, and consists in (1) means for regulating the time of stoppage of the kinematograph machine after the shot is fired to correspond with the distance of the object fired at, and (2) means for moving the film and screen at proportionate speeds to enable the pictures to be re-projected and the effect of the shots to be carefully examined. The film 16 is provided with electric contacts 15, or perforations, through which contact can be made with brush contacts b-f connected with electro-magnets 23 of relays A-E in connexion with contact pieces 49-49<4>. When a shot is fired, the circuit through the electro-magnet 11 is broken and circuits are closed through the armature 12, electro-magnets 14, 21, and contacts b-f, 15, corresponding to the supposed distance of the object on the screen. The electro-magnet 21 releases a retaining-armature 22 from engagement with a relay armature 28, which makes contact with a spring 30 in connexion with one of the corresponding contact pieces 49-49<4>. The solenoid 14 raises a core 102, provided with a piston in a dash-pot 103 and a contact-maker 48, which completes a circuit through the contact piece 49-49<4>, and 47 and an electro magnet 31, thus attracting an armature 62 and completing circuits through solenoids 69, 72 to cut off the current to the electro-magnetic clutch of the kinematograph and apply the brakes. The marksman fires in front of the moving object, and the time taken for the contact-piece 48 to move to the contact 49<4> is equal to the time a bullet would take to travel to the supposed greatest distance on the screen. The screen is wound on a store roll 101 which is operated by a weight and rope &c, and is controlled by an escapement 96 on a spindle 95 rocked by two pairs of electro-magnets 82, 92 put alternately in circuit by the movement of a contactpiece 56 on a core 89 in the solenoid 69 over contacts 79, 80 and 90, 91. To enable the shots to be checked after the firing is over, the time-lagging device is switched out of action and the screen is brought back to the starting-point by closing an electric circuit through a magnetic releasing- clutch 128 by a switch 127a, and turning the driving-shaft 98 back by a handle. A contact at the beginning of the film 16 makes contact with a brush a and completes a circuit through magnets 121, 122 of a relay F, which completes a secondary circuit through the magnets operating the escapement and contact studs on a wheel 117 of the kinematograph-driving mechanism. The studs are staggered so as to complete circuits through spring contact-strips and alternately through the magnets 82, 92. Contact-pieces on the film may complete electric circuits including devices for imitating the bursting of shells, the firing of musketry &c. Specifications 8241/10, and 10,856/11; and 5950112, [both in Class 40 (iii), Telegraphs, Electric], are also referred to.