same blade will necessarily be used on different classes of work, a "Tubing" tooth for thin tubing, thin sheet steel or brass. TROLLEY TRACK SYSTEMS The following reminders are taken from the catalog of the Coburn Trolley Track Mfg. Company. (1) If possible send a scale sketch of proposed lay-out showing us exactly what you wish to accomplish and your idea of doing it. (2) If you have no idea how best to lay out a system, send a ground plan with the points to be connected by the system accurately located thereon and such other data as will enable us to clearly understand your requirements so that we can lay out same, and we will then submit you a plan for approval. (3) State maximum load to be moved and whether for constant or for occasional use. (4) Advise if possible the application of the track best suited to your conditions as shown by the systems illustrated in this catalog, especially as regards the kind of track-bracket wanted. (5) Give some idea of size of loads aside from weight. (6) When there is to be curved track we desire to know the largest radius possible to use; the larger the curve the better the results obtained. (7) State the distance from floor to under side of roof trusses or floor timbers to which support for the track is to be attached or suspended; also give distance apart on centers, size of timbers or iron trusses, how constructed and location of same on plan. (8) State the amount of head-room between top of load and proposed location of track bed, and the type of hoist to be used. Note. It is better, when possible, to have track within 8 or 10 ft. of floor, providing of course it will not in any way interfere with the proper handling of your goods. K (7) Fill out the dimensions in a sketch like Fig. 45 or 46. (8) State material preferred for axles; hammered iron, carbon steel, etc. (9) State material preferred for wheels; cast iron with chilled treads, cast steel (with or without chilled treads). (10) How many pairs required? CAR WHEELS Information to be submitted for quotation or order. Core-.. k Track Gauge Wheel Gauge FIG. 47.-Car wheel for industrial track. (1) Supply sketch with dimensions as given in Fig. 47. Note No. 1.-The distance J is about 1/4 in. for Industrial Tracks. Note No. 2.-The diameter of hole to receive axle is the diameter of the cored hole, and will be less than the diameter of the axle by the amount required for boring. (2) Are the wheels to be made of cast-iron with chilled treads, or of cast-steel (with or without chilled treads)? (3) How many wheels are required? PORTABLE TRACK (1) Gauge of track (distance inside of rail heads). (2) Weight of rail per yard; or, send sketch of section or small piece of old rail; or, give information as to maximum wheel load, wheel base producing this load and road-bed conditions, so that required weight of rail may be calculated. (3) Length of (straight) track required. (4) State preferred length of sections and number of ties per section if known. (5) State any preference as to type of (steel) tie and method of attaching rail. (6) State preference as to style of rail connections; whether splice shoes, or fishplate joints; in latter case give drilling if required to match existing rail (distance from end of rail to centre of first hole and distance from centre of first hole to centre of second hole, and diameter of holes). (7) Curves.-Besides information in (1) to (6), state radius (to centre line of track), or give distance (for outer rail) subtended by a chord of, say, 10 ft. so radius may be calculated; state total number of degrees of curve desired, or number of sections (giving length). (8) Switches. Besides information in (1) to (6), state whether right, left, two way or three way; radius desired; with or without ground-throw (lever); state whether ordinary or climbing switch is desired. (9) Crossings. Besides information in (1) to (6), state angle of crossing; curvature (if any); and if gauge, etc., of tracks is different, give complete information for both; if crossing is complicated submit the information by a sketch. RAILROAD FROGS, SWITCHES, CROSSINGS, ETC. Fig. 48 illustrates the difference between right- and left-hand turnouts, and also exemplifies the terms in use for this material. Spread I. Rail Section Send either (1) the mill and section number, or (2) an exact outline drawing On new rails the section number is usually given; old rails do not always show paper, (2) by making a hammered impression of the end on a piece of pasteboard, (3) by forming two pieces of lead wire to the rail and sketching from the template thus obtained, (4) by some rail-section drawing device. II. Frogs (1) Give section of rail as described above. (2) Give (a) "number" of frog and (b) length of frog over-all, or length of main point rail, or both. Note (a).-The "number" of the frog is the ratio of its length to its = spread. Thus, in Fig. 49, if the distance "L" is 60 in. and the cor- = = of the main point rail), ask for the maker's standard length for the turnout in question. (3) Style of Frog. State whether a Stiff, Spring-rail or Double-pointed (Crossing) Frog is required. Also state construction preferred; whether bolted, clamped, manganese steel inserted, solid cast frog (for light rails), steel plate riveted (for light rails), etc. In case of Spring Frogs state whether they are for right- or left-hand turnouts (see Fig. 48). (4) Details. Send sketch showing spacing and size of splice-bar holes. If bonding hole is required, include in sketch. (5) Material Supplied. The regular equipment consists of the assembled frog ready to be spiked and bolted in place. Guard rails, fish plates, splice-bolts, rail braces and foot guards are extras. (6) State number of items required. III. Switches (1) Give section of rail as described above. (2) Style of Switch. State whether a standard split switch, three-throw split switch, derailing switch, T-rail tongue switch and mate, or stub switch (see V. below) is required. Is head-rod to be plain or adjustable? with or without spring? how many rods preferred? Are switch rails to be plain or reinforced? Is spring (for automatic closing) required? If three-rail split switches are required, a sketch of turnout must be submitted. (3) Main Dimensions. Gauge of Road. Length of switch rails. Note.-Fifteen feet is the standard length for standard railroad work, this being reduced for lighter rails or sharper turnouts. (4) Details. Send sketch showing spacing and size of splice bar holes. State throw of Stand which will be used with switch. State diameter of hole in end of head-rod to which the connecting rod of your stand will attach. (5) Material Supplied. (Regular Equipment): Switch rails (two), head-rod (with details as specified), tie-bars (one, two or three), switch lugs, friction plates (with or without rail braces). (Extra Equipment): Stop lugs, switch stand with connecting-rod. State which of the above items are to be supplied and which are not to be supplied. (6) State number of complete switches required. IV. Switch Stands (1) State throw required. (2) Style of Stand. State whether vertical lever switch stand, parallel throw stand (for light switches), plain ground throw with weighted lever, "plantation stand," ground throw for three-throw stub switches, automatic ground throw, ditto with high target, pony switch stand, high switch stand (automatic or non-automatic). (3) Details. Send sketch of "lamp fit" required (to suit lamp sockets). Send sketch of end of head-rod of switch, so that connecting-rod may be furnished to suit. (4) Material Supplied. State which of the following items are to be supplied and which not. Stand, connecting rod, lamp. (5) State number of stands required. V. Stub Switch Fixtures The material for one switch consists of two head chairs and two or three tie bars. (1) Give section of rail as described above (I). (2) Gauge of track. (3) Are head chairs to be for a single or three-throw turnout? (4) What is the throw of switch stand? (5) Is a switch stand to be included? (6) If so, what style, etc. (see IV)? (7) Number of items required. VI. Crossings (1) Angle of Crossing. Give angle between intersection of tracks. If gauges are different, or if either track is curved, send a plan so that relative locations may be made clear. Note that the angle of crossing on curves is between the tangents to the curves at the point of intersection of centre lines. (2) Gauge of Tracks. Give gauge of tracks, and, if different, send a plan showing relative location of the tracks. (3) Size of Rails. Give size of each rail as described in I. Note that if the sizes of the rails are different, it is customary to make the crossing of the heavier size of rail, and to use offset fish-plates, etc., for connecting to the lighter rail. (4) Style and Service. State style of traffic on each track (whether steam or street road, etc.), and otherwise indicate grade of construction desired. (5) Details. Send sketches showing spacing and size of splice-bar holes for each track. If bonding holes are required, include in sketch. (6) Material Supplied. Fish-plates are not regularly supplied; these together with step chairs (for offset connections), must be specifically ordered. (7) State number of crossings required. VII. Guard Rails (1) Give section of rail (see I) of which guard is to be made. (2) Give flange clearance required, i.e., width of flangeway between track rail and guard rail. (3) Give length of guard rail. (4) Style and Finish. State how much work is to be done on the rail, using the following schedule: Des. No. 1.-Rail bent only. Des. No. 2.-Rail bent and flange cut for flange clearance specified. Des. No. 3.-Rail bent, flange cut for clearance as above, and notched for spikes. |