Patent GB-190822724-A (GB)
Title: Improvements in Advertising Machinery.
Inventor: HILDBURGH WALTER LEO
Filed: 1908-10-26
Granted: 1909-10-21
Abstract: 22,724. Hildburgh, W. L. Oct. 26. Signals, indicator or visible.-The movable plate or plates, in appliances, such as are described in Specifications No. 10,811, A.D. 1906, and No. 22,073, A.D. 1908, [Abridgment Class Advertising &c.], are operated by directly controllable mechanism for signalling. The plate carrier b, Fig. 2, is held by a rod a, which is operated along its length by a cam consisting of a grooved block f moved perpendicularly to its length by means of a guide c in guides d. The rod a, which may be provided with a castor roller, or ball bearing q, may move along its length in a frame h, which is movable along rods m. Each grooved block may give a combination of movements, or else a single movement, and may be continuous in form, Fig. 18, A, B, or in sections. The grooves may be one-sided, and the groove for vacancy may be imaginary. With several blocks, the rod a enters and leaves each at vacancy so that on leaving one block the rod is ready to enter the next. Where the groove is straight, and is operated by hand, the above direction need not be complied with. Of course, instead of a block giving two motions to the plate, a block may give one motion to the rod a, Fig. 2, and another block may give another motion to the guide c. A stop should be provided in such case to prevent the rod a from returning and passing beyond the position for vacancy. The rod may be held against the vertical surfaces of the grooves by the force of gravity acting through a weight and cord, or by a spring or pneumatic pressure, or electromagnetically. The guiding-blocks may be arranged upon cylinders rotating inacontinuousor alternating manner. The rod a need not necessarily leave one block and enter the next at vacancy, the mechanism itself bringing the rod back to the position for vacancy. A number of grooved blocks may lie along the cylinder, and as soon as the rod has traversed one, it passes to the next, and so on to the end. The initial position may be recovered either directly or by the rod retracing its path. Thus the rod, leaving a groove of block f, Fig. 12, at zero position has the cylinder moved by a screwshaped cam &c., so as to bring the grooves of the adjacent blocks h, f into position. The blocks h are provided with grooves widened at their mouth to facilitate the passage of the rod to the second block f. If brought directly back to its first position, the rod a is lifted above the grooved blocks on the cylinder, by another grooved block, and maintained so until the cylinder has moved back the proper distance. Changing-blocks i, Fig. 13, may be employed to shift the movable plates from one vacancy. position to the next, and so the motion of the cylinder along its own axis is avoided ; the return to the initial position may be effected by lifting the rod a as before. The blocks may be attached to the cylinder by projections k sliding in grooves on the cylinder or vice versa. Movement may be given horizontally by one set of blocks, or by sheets of metal, or pins on a cylinder, and vertically by a similar device upon a second cylinder. Or, the 'movable' plate may be moved by one cylinder and the stationary' plate by another. Hand-controlled straight grooved blocks, Fig. 11, or curved grooved blocks sliding on curved guides or on cylinders may be used. The arrangement of blocks shown in Fig. 18 will give thirty positions to the end of the rod a. If two or more movable plates are eniployed, each plate may have a driving-cylinder or all the rods a may be driven from one cylinder with a set of grooved blocks for each rod, or with grooved blocks, Fig. 3, capable of working simultaneously two or more rods. The two grooves, Fig. 3, are arranged so that one of the movable plates always is caused to stand at clarity, while the other presents the required design. If it be necessary to cause two grooves to cross each other in the same block the rods a should be suitably shod. The plates are illuminated generally on the side away from the spectator and the apertures may be bordered as is shown in Specification No. 22,073, A.D. 1908, [Abridgment Class Advertising &c.]. The light may be supplied by reflection from tin, silvered glass, or like mirrors, either before or after, or before and after distribution by suitably ribbed, corrugated, or like glass. Ridges may be provided on the observer's side to hide the apertures. Rays having definite directions may be employed by the use of parabolic or other curved mirrors with sources of light at their foci, or else light-diverging reflectors may be employed. A number of parabolic mirrors cut to appear square in outline when viewed along their axis are preferably employed side by side. Lenses may be employed where illumination is from behind the plates. The lenses are of spherical or other curvature, and may be double convex or plano-convex; they may be coloured, and further, may be formed separately and held in perforated pairs of plates or they may be made in sheets or tiles of glass. The focus of each lens is preferably arranged in the plane of the stationary plate or between that and the plane of the movable plate. The light may be confined within certain limits of view by suitably shaping the lenses. The apparatus, Fig. 20, shows the concentration of rays by a lens r to a focus between the plates ; the rays fall upon a small reflector s so as to distribute them upon a reflecting surface t, t, which may be painted white. The reflector s may be of metal, silvered glass, semi-translucent glass, &c. The lens. r may be removed and parallel rays may be used or else a small incandescent lamp may be placed opposite the reflector s and behind the plates. With several movable plates rigidly connected, one cylinder and one rod a may be used, or two or more rods may be operated simultaneously by one line of grooved blocks. The mechanism may be pneumatic, hydraulic, or electric, such as a mechanism electro-magnetically operated by the rod s, or valves by which air or liquid operate the mechanism, or else pistons operated by liquid pressure and connected with the movable plate.