Chapter I
. Toys Operated by Permanent Magnets.--II. Toys Operated by Static Electricity.--III. Making Electromagnets for Toys.--IV. Electric Batteries.--V. Circuits and Connections.--VI. Toys Operated by Electromagnets. VII. Making Solenoids for Toys.--VIII. Toys Operated by Solenoids.--IX. Electric Motors.--X. Power, Speed, and Gearing.--XI. Shafting and Bearings.--XII. Pulleys and Winding-Drums.--XIII. Belts and Cables.--XIV. Toys Operated by Electric Motors.--XV. Miscellaneous Electric Toys.--XVI. Tools.--XVII. Materials.--XVIII. Various Aids to Construction.
While planning this book, Mr. St. John definitely decided that he would not fill it with descriptions of complicated, machine-made instruments and apparatus, under the name of "Toy-Making," for it is just as impossible for most boys to get the parts for such things as it is for them to do the required machine work even after they have the raw materials.
Great care has been taken in designing the toys which are described in this book, in order to make them so simple that any boy of average ability can construct them out of ordinary materials. The author can personally guarantee the designs, for there is no guesswork about them. Every toy was made, changed, and experimented with until it was as simple as possible; the drawings were then made from the perfected models.
As the result of the enormous amount of work and experimenting which were required to originate and perfect so many new models, the author feels that this book may be truly called "Real Electric Toy-Making for Boys."
* * * * *
Every Boy Should Make Electrical Toys.
A MOTOR THAT CAN DO THINGS
The "St J. Motor No. 1" (List No. 2201) is designed for students and others who want a small motor for experimental purposes as well as for all of the work that any small motor can do. We believe this to be the best small motor made, and we know that it can be used in more ways than any other motor of equal cost ever built. It has four binding-posts,--making it possible to energize the field or armature separately,--and so it can be used in circuits with reversers and rheostats for experiments. The speed and direction of rotation can be changed at will, thus adapting it for running toys, etc. As the binding-posts are mounted upon the frame, this motor can be taken from the base for remounting and using in many ways, and as it has a three-pole armature it will start promptly in any position. The shaft carries a pulley, and a fan can be added at any time. One cell will give a high speed, and more cells may be added, according to the work it has to do.
Motor No. 1 stands 3-1/2 inches high. It is finished in black enamel with nickel-plated trimmings,--strong and well made. With it are furnished three nickel-plated connecting-straps, which are to be used for connecting the field and armature in "series" or "shunt." So much can be done with this motor that it is simply impossible to tell it here; in fact, it is used as the basis for a whole book of 60 experiments called "The Study of Electric Motors by Experiment," and, when used in connection with the other parts of the Motor Outfits, it will give a practical knowledge of motors that no other plan can give.
[Illustration: No. 2201]
These motors and motor outfits have been highly praised by electrical experts and educators as being invaluable to students. They can do everything the big motors can do, and if used with the rheostats, reversers and other apparatus in the outfits, the student will have a whole motor laboratory.
Why not get a motor that has brains and that can do tricks and experiments? Any good motor will go when you turn on the power; but that doesn't mean much when it comes to understanding things.
No. 2201--"St. J. Motor No. 1," with Wiring-Diagrams $1.35
If sent by mail, postage extra, shipping weight one pound.
"ST. J." ELECTRIC MOTOR OUTFIT
These outfits have been designed for students and others who want to do real experimental work with motors, so as to get right down to the bottom of the matter and thoroughly master the foundation principles of the subject. It is simply astonishing to see how much can be learned with one of these outfits, especially if the work be done as fully detailed in "The Study of Electric Motors by Experiment." Every electrical laboratory should have one of these sets, and the more you know about motors the more you will appreciate an outfit of this kind.
Don't simply read about motors--get right down to the practical part of it and experiment for yourself. Every experiment will settle an important point in your mind.
ELECTRIC MOTOR OUTFIT No. 2226X contains everything needed for sixty interesting and profitable experiments. With the improved apparatus that we now give we feel that this is the most complete set ever sold for the money. The following articles are included, packed in a wooden box:
THE "ST. J." MOTOR, fully described on another page, is well called "A motor that can do things."
THE FIVE-POINT RHEOSTAT is used as a "starting-box" in the armature-circuit and in various other ways to regulate speed. (See cut.)
THE ELEVEN-POINT RHEOSTAT is used to regulate the "field-magnetism," as one method of speed-regulation, and for other purposes. (See cut.)
THE DOUBLE-KEY CURRENT REVERSER is, really, a key, a two-point switch, and a current-reverser combined. On this account it can be used in many ways, shown in numerous wiring-diagrams. (See cut.)
THE HANDY CURRENT-DETECTOR is used as a current-detector and as a device for studying the counter-electromotive force of motor while running.
THE TWO-POINT SWITCH is useful in quickly switching the current wherever it is needed, and for many other experiments.
THE STRAP KEY protects the batteries and closes the circuit.
THE MINIATURE ELECTRIC LAMP AND SOCKET are used in the motor-circuit to prove certain things and form an attractive addition to the outfit.
THE MAGNETIC NEEDLE in the new outfits is nickel-plated and serves as a compass for studying the magnetism of the poles, etc.
IN ADDITION to the articles mentioned above, the outfit contains a Set of Wires for Connections, a Box of Iron-Filings for studying lines of force, an Experimental Package containing Iron, Steel, etc., three Connecting-Wires, and
THE BOOK OF INSTRUCTIONS, called "The Study of Electric Motors by Experiment." This contains 10 chapters, 110 pages, and over 70 illustrations and diagrams. Bound in stiff paper.
BATTERIES are not included, unless ordered extra. Three of our No. 1101 batteries cost 36c., and extra postage for 2 lbs.
No. 2226X--Complete Motor Outfit, as above (P. weight, 3 lbs.) $3.75
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THE STUDY OF ELECTRIC MOTORS BY EXPERIMENT
contains Sixty Experiments that Bear Directly upon the Construction, Operation, and Explanation of Electric Motors, together with Much Helpful Information upon the Experimental Apparatus Required. This book will be a great help to those who want to do real experimental work with motors. It contains 10 chapters, 110 pages, over 70 illustrations and diagrams, and you can not afford to be without it.
No. R57P--"Study of Motors," bound in paper, postpaid $0.35
No. R57C--"Study of Motors," bound in cloth, postpaid $0.60
Fun With Telegraphy (PATENTED)
TWO GREAT OUTFITS FOR STUDENTS
[Illustration]
These two outfits are similar in construction, although they differ in details, each being designed for its special work. The "keys," "sounders" and "binding-posts" are neatly mounted upon ebonized bases measuring 6-1/2×3-3/4 in., these also serving as sounding-boards.
"Fun with Telegraphy" is the original low-price telegraph outfit for students that has sold by the thousands and given universal satisfaction. It is considered the best 50-cent outfit ever produced, and, although we have made several improvements lately, the price is the same as before. In connection with a peculiar oscillating electro-magnet and a queer anvil, the sounding-board aids in giving out a loud, clear click that is found elsewhere only in noisy railroad sounders. This outfit is best adapted for a learner's set of one instrument and a battery to be used on the table for practising, either with or without the "codegraph," and not for telegraphing over wires to other stations.
Outfit: Illustrated Book of Instructions, called "Fun with Telegraphy"; Telegraph "Key"; Telegraph "Sounder"; Nickel-Plated "Binding-Posts"; Insulated Wires for Connections.
No. R8--"Fun with Telegraphy," without battery, postpaid $0.50
No. R8, R8B--"Fun with Telegraphy," with one dry battery, postpaid, .65
"Improved Telegraphy No. 2."--In answer to a number of requests for an improved outfit for regular line work between two stations a few hundred feet apart, we now offer this set, which is, in general, similar in plan to our first "Telegraphy No. 2." We have replaced the single electro-magnet of the old set, as shown in the cut, with two larger ones of superior construction, thus making the instrument much more sensitive. The key has also been greatly improved, and we now have a fine set at low cost.
No expensive gravity batteries are needed with this ingenious arrangement, as it is designed to work with dry batteries which are clean and cheap. By means of a peculiar switch, either station may "call" the other at any time, even though the line is kept on "open circuit." There is absolutely no waste of current when the line is not in use--and, even then, only at the instant the dots and dashes are made. This is certainly a great advantage over the old-fashioned methods with gravity batteries which amateurs have heretofore been obliged to use. With this instrument you have a learner's set as well as one that can be used to send messages to another station. If you do not care for the superior advantages of "Semi-Wireless," this outfit will give entire satisfaction for ordinary work.
Outfit: Illustrated Book of Instructions called "Telegraphy Number Two"; Improved Telegraph "Key"; Telegraph "Sounder" with Double Electromagnets: Special "Switch" for controlling the batteries; Nickel-plated Screw "Binding-posts"; Insulated Wires for connections.
No. 2307--"Improved Telegraphy Number Two" (no batteries), postpaid, $1.00
No. 2307B--Same as No. 2307, but with two dry batteries, postpaid, 1.35
The Codegraph (PATENTED)
NOTE--Continental Code sent unless otherwise ordered.
[Illustration]
The Codegraph is a brand-new scheme for thoroughly and rapidly learning the telegraphic code, and it has been worked out with the beginner in mind. This code-learning system really adapts itself to the beginner, and it gives a personal touch to each individual student according to his needs. No other system can do so much, for the student sees, hears and feels every letter and signal.
The greatest trouble that every one has in learning by listening to regular messages is in separating the letters and words as they come in so fast. There is no time to think, and letters pile up in the mind. The codegraph avoids all confusion because every letter is under perfect control and may be repeated as many times as desired; hard things can be made easy; words and sentences can be built at will. We guarantee that any one of average ability can make rapid improvement with the codegraph.
What It Is. A complete codegraph outfit, as shown in the cut, has three main parts: (1) The "plate and pen," (2) some form of "key and sounder" and (3) two batteries. While any key and sounder can be used with the plate, we wish to call especial attention to the duplex sounder shown, as this has been designed to do double work. If you already have "Fun with Telegraphy," for example, and want to order the "Codegraph Plate and Pen," we will include, free of charge, an extra attachment for connecting up your instrument.
The Plate and Pen. When the pen is lightly drawn over the plate, the sounder responds and shows exactly how every letter and signal should sound. The student can then practise each letter until perfect. The surface of the plate is covered with a special insulating enamel, bare spots corresponding to correct dots and dashes. The polished brass plate measures about 6×8 inches and has a most elegant appearance. The book tells all about practising, etc.
Duplex Codegraph Key and Sounder, as shown, has a double action and is the latest thing in code-learning devices. By the mere turning of a switch you can have the ordinary telegraph clicks or the wireless buzzes, making two sounders in one and at the cost of one. The combination sounder and a substantial key are mounted upon a finely finished base with nickel-plated trimmings, binding-posts, switch, etc. If you want to become an operator in the shortest possible time, no matter whether you have ever tried before or not, get one of these outfits and begin at once. You will be pleased right from the start, because you will make rapid progress right from the start.
No. 2350--"Codegraph Plate and Pen," with Book of Instructions $1.00 If sent by mail, postage extra .12 No. 2351--"Duplex Codegraph Key and Sounder" (no batteries) 1.00 If sent by mail, postage extra .10 No. 1102--Two Dry Batteries, as shown .25 If sent by mail, postage extra .10 Special--Complete Codegraph Outfit, as in cut, postpaid 2.50
TELEGRAPH AND TELEPHONE SETS (LIST T)
ORIGINAL OUTFITS that are worthy of your attention and that give fine results; products of hundreds of experiments and models that give best value for least money. A complete line of outfits beginning with "Fun with Telegraphy" and ending with combined "Semi-Wireless Telegraph, Telephone and Electric Light Signal Sets," with endless possibilities.
Don't forget to add postage according to weight and zone.
List No. List Price
2302--"NEW FUN WITH TELEGRAPHY." A Book, Key, Sounder, Wires. Nicely mounted, sensitive, adjustable, improved, practical. (P. Wt. 1 lb.) $0.35
2302B1--Same as No. 2302, but with 1 dry battery. (P. Wt. 1 lb.) $0.50
2308--"NEW TELEGRAPHY NUMBER TWO." For regular line-work: has ingenious switch; uses dry batteries. Key, Sounder, Book, Wires. (P. Wt. 1 lb.) $0.75
2308B2--Same as No. 2308 but with two dry batteries. (P. Wt. 2 lbs.) $1.00
2304--"CLICKERBUZZ" TWO-STATION TELEGRAPH OUTFIT. Special value; loud, resonant, substantial, very neat and does several things. Complete with two separate No. 2580 "WONDERBUZZ" Instruments, Morse Code, Continental Code, Wire for short Line, Pkg. small Telegraph blanks, Instructions and Wiring Diagrams. (P. Wt. 2 lbs.) $2.00
2304B4--Same as No. 2304 but with four dry batteries. (P. Wt. 3 lbs.) $2.50
2350--CODEGRAPH PLATE, PEN AND BOOK. Teaches Continental Wireless Code, giving correct sounds on your buzzer or on ours. Original, practical, solves home study. (Weight 1 pound.) Price $1.00
2355--CODEGRAPH OUTFIT MOUNTED on ebonized base with High-pitch Nickel-plated Buzzer, Binding-posts and Key, Books and Wires. Fine set for practice and study. Continental Code. (Weight, 2 lbs.) Price $2.75
2355B2--Same as 2355, but with 2 batteries. (Wt. 3 lbs.) Price $3.00
2580--"SEMI-WIRELESS WONDERBUZZ," a real wonder that can actually be used in 40 hookups. A basic instrument around which to build Code-teaching Devices, Blinker Signal Systems, numerous Click Telegraphs, Buzz Telegraphs, Semi-wireless Telegraphs, several Telephone Plans, combined Telegraph and Telephone schemes over the same wire, actual Room-to-room Wireless, etc., etc. Can't begin to tell it all here. An all-useful instrument with directions. (Weight, 1 lb.) Price $1.00
2576--THE "WONDERPHONE" is a practical, inexpensive telephone set; sensitive, strong and well made. Outfit for one station: Receiver, Carbon Grain Transmitter, both with flexible wires, Combination Binding-post and Instrument Support, Battery Box, Wire for Connections, 50 ft. of Line Wire, Directions. (Weight, 1 lb.) Price $1.50
2576B2--Same as No. 2576, but with 2 batteries, (Wt. 2 lbs.) Price $1.75
2582--"SEMI-WIRELESS TELEGRAPH, TELEPHONE, AND ELECTRIC LIGHT SIGNAL SET." A Combination of the "Wonderbuzz," the "Wonderphone," Night Signal Attachment, and a Lot of Extras, Line Wire, Etc. A set that beats them all and does most. No other system does so much for the money and no other can do so much for ten times the money. A wonder combination of usefulness. Please read about the "Wonderbuzz" and the "Wonderphone." The latest word in telegraphy from Cascade Ranch. (Weight, 2 lbs.) Price $2.75
2582B2--Same as No. 2582 but with 2 batteries. (Wt. 3 lbs.) $3.00
No. STJC--SAVE-TIME-JIFFY-CODE. Learn to send and receive slowly in an hour or less. In a day you can telegraph in a jiffy, any message, punctuation, numbers, sentence-signals and the whole business. Every boy a telegrapher. Fun to make your own Cipher Codes on this as a basis. Complete, postpaid 6c., two for $0.10
2425--"DANDY HANDIPHONE." An inexpensive house-to-house telephone. Sensitive, attractive, practical, efficient. Rings bell or buzzer to call, using dry batteries. Will work as far as any battery-phone, and farther than many of them. A dandy Handiphone. In preparation.
Be sure to add postage according to weight and zone.
THOMAS M. ST. JOHN, Cascade Ranch, East Windham, N.Y.