A question and answer game comprising a plurality N of normally open electrical contact devices distributed on a board, each device having an identifying reference. An indicator device is controlled by an electrical system which interconnects in a predetermined manner at least some of the N contact devices in order to establish n different combinations each comprising at least p series connected contact devices (p being greater than two) the closure of which causes the actuation of the indicator...

A game including a stand, a spinning wheel rotatable on the stand which has circumferentially spaced and different indicia thereon, a pointer which may be spun about the center of the wheel, and a set of cards. Each card has an indicium on one of its sides, and a word on the reverse side corresponding to the indicium. When a person spins the wheel and/or the pointer, and when the wheel and/or pointer has come to rest, and the pointer points to one of the indicia on the spinning wheel, the person...

An educational toy comprising a frame structure provided with two compartments for separately receiving each one of a series of selective quiz and answer boards, a flexible channel bar having a plurality of selective electrical connections, and two mechanisms to show whether the answer is affirmative or negative when an answer board is placed to match a corresponding quiz board via said flexible channel bar.

A can unscrambler for unscrambling and feeding cans which have ferromagnetic bottoms and nonmagnetic sides to a delivery station in erect condition. The unscrambler comprises a bin for holding a jumbled supply of cans and a driven endless belt conveyor with reaches running along the bottom of the bin, curving upward out of the bin, extending back over the bin to a magnetic roll, extending overhead from the latter to the delivery station, and returning to the bin. Magnets are provided adjacent th...

A method for maintaining anode activity in electrodeposition systems by continuously and repetitively contacting the surface of the anode during the electrodeposition reaction with a plurality of small, dynamically hard particles held in spaced, fixed relationship to one another in or on a supporting matrix.

This invention provides the user with immediate feedback as to the correctness or incorrectness of their respones to multiple choice, true - false, and cross matching questions by the use of a hand held electric probe that produces a magnetic field; where said magnetic field is picked up by at least one of the linear electroconductive elements in each of two sets of electroconductive elements. These two sets of electroconductive elements are arranged one immediately above the other in two parall...

A method of providing the primer anvil wire of a percussive-type photoflash lamp with a coating of a fulminating material in which the anvil wire is dipped into a body of fulminating material to a predetermined depth to provide a coating thereof on the anvil wire extending along its length a predetermined distance from one end thereof, the coating is dried and then the coating is electrochemically stripped from a segment of the wire extending from the coated end thereof to thereby provide an anv...

A set or assortment of cards bears question material, together with multiple choice answers. The card is placed face up on a surface containing closely spaced opposed conductors of an electric signalling circuit. At the rear of the card there is a recess in registry with the correct answer and containing an electrically conductive bottom wall, so that the electrically conductive material is normally spaced above the electrical conductors. When an answerer presses his finger upon a correct answer...

A teaching machine is provided with a plurality of normally open electric current paths each connected to an indicator. The current paths are arranged in accordance with a predetermined program and are individually closed to actuate the indicator by means of an electrically conductive training card which is positionable on the teaching machine. Each training card has various pairs of correlated indicia on one side and electrically conductive paths on the other side, the conductive paths being ar...

An instructional device or educational toy having a series of question and answer cards that are interchangeable on a portable console having spaced push buttons that selectively actuate an electrical signal system. The cards have a metallic tape or a metallic imprint on the rear, hidden side of the card directly under a corresponding correct push button whereby, when the correct push button is pushed, the signal system is made operative.