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Marinelli Bells – Pontifical Bell Foundry (Italian: Campane Marinelli – Pontificia Fonderia di Campane) is a bell foundry in Agnone, Italy. Founded no later than 1339, the foundry is one of the oldest family businesses in Italy. [ 2 ]
A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire or a fire alarm activation. Typically installed on street corners or on the outside of commercial buildings in urban areas, they were the main means of summoning firefighters before the general availability of telephones.
A fire alarm notification appliance is an active fire protection component of a fire alarm system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
To sustain the tone, these bells were usually much larger than are used today with interrupter bells. Bells, gongs and spiral chimes could all be used, giving a distinct tone for each instrument. A simple development of the single-stroke bell was the sprung bell. This had previously been used, mechanically actuated, for servant-call bells in ...
The housing of the bell box may be manufactured from wood, metal, or plastic. The basic core component of a conventional bell box is an electromagnet and a bell or other metal piece, some of which create a repetitive sound. [1] The bell sound is normally created inside the box, although the unit may have bells mounted on the outside of the box.
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If used to any great extent, the addition would injure the tone not improve it. [18] [20] Small quantities of other metals found in old bell metal are likely to be impurities in the metals used to form the alloy. [18] Decorative bells can be made of such materials as horn, wood, and clay. [15]
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