Sireno No. A-D
| Sireno No. A
Sireno No. B Sireno No. C Sireno No. D | |
| [[File:{{{image}}}|200px]] | |
| Company | Sireno |
|---|---|
| Produced | 1948?-? |
| Type | Directional Electromechanical (Type A-C)
Omnidirectional Electromechanical (Type D) |
| Voltage | 110-220 V AC |
The No. (Type during their introduction) A, B, C, and D are 4 small electromechanical sirens that were produced by Sireno. Introduced in 1948, these sirens were likely intended to compete with Federal's various directional small sirens. These sirens unfortunately saw little success, especially the lower-performance models, and very few units are known to exist today.
Design
No. A
The No. A (originally named the Type A) is a small directional electromechanical siren, and the heavy-duty option in the series, intended for general outdoor use. The No. A consists of a thin 5½" 6-port rotor and stator, driven by a small either 110 or 220 V universal motor with adjustable ball bearings behind the stator. Each port has a finger guard, and the stator is covered with a plate with Sireno's logo on the center to prevent injury from misuse of the siren, as it is small enough to be handheld. Earlier units had plates with much large openings and no Sireno logo on them. In a similar fashion to Federal's Type A and D (which it was likely intended to compete with), the siren has a large bowl-shaped horn and a long flush intake attached to its rotor and stator assembly, boosting the siren's output. Some units are known to use a more cylindrical horn. The motor has an ovular junction box attached to the bottom corner of its side. The siren is attached to a swivel mount, allowing the siren to project a certain degree up or down. The base of the mount is rectangular and has 4 holes in each corner for the siren to be bolted to a flat surface. The No. A comes in a weather resistant red enamel finish. The siren is 7¾" long and 12½" tall and weighs around 21 lbs. Rebranded No. A units were sold by W.S. Darley & Co. for a period of time under the "Advance Alarm" Model C987 name.
No. B
The No. B (originally named the Type B) is a small directional electromechanical siren, and the lightest-duty option in the series, intended for indoor use alongside the No. C, and is the base for the No. A and C. The No. B consists of a thin 5½" 6-port rotor and stator, driven by a small either 110 or 220 V universal motor with adjustable ball bearings behind the stator. Each port has a finger guard, and the stator is covered with a plate with Sireno's logo on the center to prevent injury from misuse of the siren, as it is small enough to be handheld. Earlier units had plates with much large openings and no Sireno logo on them. The motor has an ovular junction box attached to the bottom corner of its side. The siren is attached to a swivel mount, allowing the siren to project a certain degree up or down. The base of the mount is rectangular and has 4 holes in each corner for the siren to be bolted to a flat surface. The No. B comes in a weather resistant red enamel finish. The siren is 7¾" long and 10" tall, and weighs around 14 lbs. At least one No. B is known to exist in private possession. These likely were unpopular due to their poor performance and indoor sirens being a niche market.
No. C
The No. C (originally named the Type C) is a small directional electromechanical siren, and the light-duty option in the series, intended for general outdoor use. The No. C consists of a thin 5½" 6-port rotor and stator, driven by a small either 110 or 220 V universal motor with adjustable ball bearings behind the stator. Each port has a finger guard, and the stator is covered by a plate with Sireno's logo on the center to prevent injury from misuse of the siren, as it is small enough to be handheld. Earlier units had plates with much large openings and no Sireno logo on them. In a similar fashion to Federal's Type A and D (which it was likely intended to compete with), the siren has a long flush intake attached to its rotor and stator assembly, boosting the siren's output. The motor has an ovular junction box attached to the bottom corner of its side. The siren is attached to a swivel mount, allowing the siren to project a certain degree up or down. The base of the mount is rectangular and has 4 holes in each corner for the siren to be bolted to a flat surface. The No. C comes in a weather resistant red enamel finish. The siren is 12½" long and 11½" tall, and weighs around 20 lbs. No units are known to exist, presumably because of the siren's poor performance.
No. D
The No. D (originally named the Type D) is a small omnidirectional electromechanical siren, and was essentially the vertical variant of the No. B. The No. D consists of a thin 5½" 6-port rotor and stator, driven by a small either 110 or 220 V universal motor with adjustable ball bearings below the stator, which is encased within a cylindrical housing with a mounting base with 4 holes allowing for the siren to be bolted to a flat surface below it. The motor has a large, rectangular junction box attached to the housing. A large, rounded cover which has a slightly flattened top protects the rotor and stator and is held up by 4 curved support legs attached to the bottom of the stator. Several sirens with similar characteristics to No. Ds are known to exist, created by an unknown manufacturer which seemed to have some affiliation with Sireno. These sirens can be told apart from genuine Ds by their simplified and smaller mounting base, the lack of a junction box (although some genuine No. Ds lack the junction box) their completely rounded cover as opposed to the slightly flattened one, and their support legs having straight ends as opposed to the original No. D having supports which are curved. These No. D look-a-likes are also painted green, unlike the original red.