I have a circuit breaker that hums when the dryer is running (i.e. drawing a lot of amps), but that is because it has a solenoid (based on an electro-magnet, similar to how speakers work if not exactly the same thing). ❋ Jackwilliambell (2010)
By the end of the evening I hauled out a gong-sized electro-magnet in a vain attempt to pull the compass arm north. ❋ Unknown (2009)
He together with Dr Ian Pykett were heavily involved in the installation of our first 0.1 T electro-magnet and subsequent RF and gradient coil designs. ❋ Unknown (2004)
And as Ned talked on, Mahony conceived John to himself as a kind of electro-magnet, which, once it had drawn these lesser creatures after it, switched off the current and left them to their own devices. ❋ Unknown (2003)
His ship was armed with a doze heavy guided missiles and two turrets of electro-magnet - ic guns. ❋ Clarke, Arthur C. (1953)
Fig. 2 only one of the limbs or cores of the electro-magnet is attached to the diaphragm, the other limb being held fixed by a screw. ❋ Various (N/A)
[Here was shown a large electro-magnet and an induction-coil vacuum discharge spinning round and round when placed in its field.] ❋ Various (N/A)
At each selenium contact of the rectangular disk there is a corresponding contact to the battery and electro-magnet. ❋ Various (N/A)
The lifting power of an electro-magnet of given volume is proportional to the heat generated against resistance in the wire of the magnet. ❋ Various (N/A)
Through this catch, G, the wheel is dependent on the movement of electro-magnet. ❋ Various (N/A)
The poles of the electro-magnet are brought very close together by being shaped as shown, and the middle part of the magnet is firmly screwed to the case of the instrument. ❋ Various (N/A)
In Theiler's telephone the electro-magnet may be of the usual U-shape, and may consist either of soft iron or of hardened steel permanently magnetized, wound with a suitable number of turns of insulated wire. ❋ Various (N/A)
In previous systems in which an electro-magnet is used, the sonorous vibrations are due either to the motion of an iron diaphragm or armature placed close to the poles of the electro-magnet, or to the expansion and contraction of the magnet itself. ❋ Various (N/A)
When these telephone receivers are used on a line of some considerable length, the patentees prefer to magnetize the electro-magnet by a constant current from ❋ Various (N/A)
Instead of making the electro-magnet of one continuous piece of iron, as represented in Fig. 1, the patentees find it more practicable to make it of the form shown in Fig. 2, where the electro-magnet represented consists of two limbs or cores, a sole piece, and pole extensions, the whole being screwed together, and practically constituting one continuous piece of iron carrying the two coils. ❋ Various (N/A)
Fig. 1 represents one of the telephone receivers provided with two diaphragms or sounding boards, connected to the two limbs or cores of the U-shaped electro-magnet by short tongues. ❋ Various (N/A)
The electro-magnet is, then, not inserted in the line at all, but in the primary circuit of an induction coil, and connected with a local battery. ❋ Various (N/A)
This telephone receiver differs from its predecessors in dispensing with an armature, the lateral vibration of the electro-magnet itself being utilized. ❋ Various (N/A)
Instead of using a diaphragm, they sometimes fix a stem to one of the cores of the electro-magnet, and mount thereon a light disk of vulcanite, wood, ivory, gutta-percha, or any other substance which it is capable of vibrating. ❋ Various (N/A)
When a vibratory current is sent through the helix of the electro-magnet, the extremities are rapidly attracted and repelled, and this vibratory motion of the magnet cores being communicated to the diaphragms or sounding boards, the latter are set in vibration of varying amplitude produced by a current of varying strength, as in all other telephones. ❋ Various (N/A)
