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    • 4. 发明专利
    • Improvements in surveying instruments
    • GB232362A
    • 1925-04-23
    • GB318524
    • 1924-02-07
    • ALFRED TAYLOREDWARD WILFRED TAYLOR
    • G01C3/02G01C3/30
    • 232,362. Taylor, A., and Taylor, E. W. Feb. 7, 1924. Tacheometers.-In a tacheometric telescope of the internal focusing type, means are provided whereby, in the act of focusing, the distance from the centre of the instrument to the anallatic point is automatically indicated. The anallatic point, is the point whose distance from the object focused bears a constant relation to the stadia intercept, and its position depends on the distance of the said object, i.e. on the focusing. In the form shown the telescope a is secured to the transit axis b which is pivoted in standards c. The focusing lens e is carried by a slider d having a rack f operated by a pinion g, which is rotated by the head h. The pinion is provided with teeth j meshing with a gear k which meshes with internal teeth on a rotary member in the face of which carries a scale co-operating with an index on the fixed member l to show the required distance. In another form a scale is marked on the member d and is viewed through a window in the telescope tube. Specification 215,673, [Class 97 (i), Optical systems &c.], is referred to.
    • 5. 发明专利
    • Mechanical improvements in cinematograph projection
    • GB230384A
    • 1925-03-02
    • GB2410424
    • 1923-11-29
    • ALFRED TAYLORHAROLD DENNIS TAYLOR
    • G03B1/42
    • 230,384. Taylor, A., and Taylor, H. D. Nov. 29, 1923. Kinematograph apparatus.-In continuous-feed projectors the construction of the sprockets is modified and differential gearing is provided to ensure the correct placing of the film picture in the gate irrespective of variations in the correct spacing of the sprocket holes. The modifications are described with reference to the system of projection set out in Specification 230,152. The sprockets D , D , Fig. 1, are in three parts, the end portions carrying the teeth being constructed so as to permit axial movement under the pressure of a spring surrounding a sleeve in one with the end-piece 5 and acting against the end of a similar sleeve on the end piece 6. The drum portion of the sprocket is mounted loosely on the sleeve extensions of the end pieces 5, 6. The sprocket teeth are formed so that they permit the film to bear on the roller 7. Loose rollers 8 of the same diameter as the roller 7 are placed outside the pieces 5, 6 as shown, and the film is pressed against these rollers by spring-controlled jockey rollers J. The differential gearing by which the film picture is raised or lowered comprises a toothed wheel 10 rotating freely on a sleeve on the driving pinion 9 and carrying a toothed pinion 11 in gear with wheels 12, 13, one of which has one more tooth on its periphery than the other. To alter the position of the picture a toothed detent r is brought for a short time into contact with the wheel 10, causing one of the wheels 12, 13 to rotate faster than the other, and thus to advance or retard the film in the gate. In a modified form of sprocket the sprocket is made in radial sections which may be pressed outward against the action of a spring by means of sliding coned sleeves on the sprocket spindle. This movement enables the diameter of the sprocket to be varied in accordance with alterations in the pitch of the sprocket holes. The sliding sleeves are moved by a screwed head in one with them held in position by a spring catch. The setting of the screwed head is determined by a film gauge, Fig. 7, provided with two fixed teeth t at one end and a tooth T on a lever L at the other end. The indication of the scale A gives the setting of the screwed head of the expansible sprocket. A further modification of the sprocket, Fig. 5, consists in omitting every other tooth of the sprocket and fitting the jockey wheels with the teeth and recesses as shown. The movable portion of the gate is pressed against the fixed portion of a balanced lever, Fig. 1 , and the opposing surfaces of the gate may be curved concave to the lens to a radius of four times the focal length of the lens, which is preferably that described in Specification 210,705. The gate may comprise surfaces of glass or quartz. Specifications 155,793 and 197,707 also are referred to.
    • 6. 发明专利
    • Improvements in cinematograph projection
    • GB230152A
    • 1925-03-02
    • GB3013123
    • 1923-11-29
    • ALFRED TAYLORHAROLD DENNIS TAYLOR
    • G03B41/06
    • 230,152. Taylor, A., and Taylor, H. D. Nov. 29, 1923. Kinematograph apparatus.-In a continuousfeed projector, the gate has a height not exceeding one picture pitch, and compensation for the movement of the film F is effected by reflection from an outwardly reflecting drum M of at least 48 flat mirrors ranged evenly and cylindrically. The rotation of the drum is so synchronized with the travel of the film that the angle of reflection with the perpendiculars to the mirrors changes at half the rate of the angular movement of the pictures as subtended at the back principal point of the lens F. In such an apparatus, the lens described in Specification 210,705 is preferably utilized so that the virtual stop or the image of the electric arc is situated at such a distance in front of the lens as to fall upon the mirrors of the rotating drum. The optical principles involved in the production of good definition in the image projected by the above arrangement of apparatus are discussed at length in the Specification. The mirrors are preferably of tapered form across the width of the drum, Fig. 5, the mean width in the direction of movement being about one-sixth of the focal length of the projector lens. Each mirror is supported upon two independent rocking frames l and a stud s on the drum, and held in contact with studs s, s on the frames l and the stud s by spring clips 6 as shown. The frames l or each provided underneath with two rounded edged knife edges k riding in grooves in the drum at right-angles to the radius of the drum through the centre of each mirror. The other ends of the frames rest on points of adjusting screws a. A spring p keeps the frames l bearing on the grooves. Each mirror is thus supported on three points and is adjustable by means of a single screw a. When an internally reflecting drum, Fig. 10, is used the projector lens L is situated so that the optical axis is at an angle of about 30‹ to the perpendicular to a mirror centrally opposed to it, and the image is projected on to a screen by means of an inclined mirror R. Specifications 178,474 and 184,258 also are referred to.