Honeywell Gent

Honeywell Gent
Names	John T. Gent & Co. (1872-1940s) Gents' of Leicester (1938?-1975) Gent of Leicester/Chloride Gent (1975-1983) Gent Limited (1983-2005) Gent by Honeywell/Honeywell Gent (2005-present)
Headquarters	Leicester, LEC
Founder	John Gent
Key people	John Gent
Founded	1860s? 1873
Products	Fire detection and alarm systems
Website	buildings.honeywell.com

Honeywell Gent (also Gent by Honeywell) is a subsidiary of Honeywell and a notification equipment supplier headquartered in Leicester, LEC. The company was established by John Thomas Gent sometime in 1872 but could've been trading as early as the 1860s.

For over a century, Gent was a well-known manufacturer of electrical equipment, in particular its electric clocks, which were used in public buildings and railway stations all over the world. Gent was one of many companies that was commissioned by the British government to produce sirens during World War II to warn of incoming air raids on British cities by Nazi aircraft. After a series of takeovers, Gent eventually came under the ownership of Honeywell, and the company's primary focus has been fire detection and alarm systems since its acquisition.

History

WIP

Products

Tangent

The Tangent series was a line of dual rotor electric sirens (also referred to as "syrens" by the company) that were produced by Gents' of Leicester during World War II, competing with the likes of Carter and Castle Castings to warn of Axis air raids in Britain. These sirens would also see limited service after the war.

Type 1461

The Type 1461 was the only electric vehicular siren produced by Gents. It consists of the 8-inch 15-port rotor and stator from the Type 1479, driven by a 12 V DC ¹⁄₁₅ hp electric motor. The siren had only 8 amps of continuous amperage draw, which made it suitable for emergency vehicles of its day. It was primarily designed to replace tire and flywheel-driven friction sirens in use at the time, as they were found to be both unreliable and potentially dangerous. The siren has no projector or motor cover and sits on a small inverted U-shaped mount. An ornate cover protects the siren's intake from debris or user error.

Type 1468

The smallest dual rotor siren made by Gents', the Type 1468 is a small step up from the Type 1479. The Type 1468 makes use of 8-port and 15-port rotors and stators and were available in 8/8-port or 15/15-port single tone, and 8/15 dual tone. The siren is driven by a ¼ hp AC motor running at 50 Hz, likely on 1 ph power. Little else is known about this siren, but at least two dual-tone units remain.

Type 1469

The Type 1469 (sometimes marked as Type IND on the tag) is a single rotor siren that was produced by Gents'. The Type 1469 makes use of a single 12-port rotor and stator attached to one side of a ½ hp AC induction motor, running at 50 Hz on 220 V 1 ph power. The siren's rotor is likely very similar to the 12-port side of the Type 1471 and is likely a single-rotor variant of that siren. The Type 1469 is a horizontally mounted siren, with a large square base acting as a mount, with four screw holes. The motor is attached to the base by two thin strips of metal. The siren could come with a manual shutter, which swivels over the intake to block the intake of air and make the siren much quieter if desired. The Type 1469 is an extremely rare siren, with very few units known to still exist today. It has a distinctively thinner rotor and stator compared to many British sirens of the time, including Gents' other models.

Type 1471

The smallest dual-tone siren in the Tangent lineup, the Type 1471 is a dual-tone electric siren that makes use of two rotors and stators on either side of a 1 hp AC motor, running at 50 Hz, 1 or 3 ph. The Type 1471 has a 10-port rotor on one side, and a 15-port rotor on the other, making the siren 10/15-port dual tone. The siren's bare motor is attached to a small, square stand for mounting purposes. The 1471 is considered extinct, as no surviving units are known to exist.

Type 1472

The Type 1472 is a unique quad-rotor siren that was produced by Gents'. The siren resembles a regular dual-tone siren but with two additional rotors and stators driven by one rotor shaft. The siren is unique in that it is a tri-tone siren, with three different ports. The two middle rotors and stators are 10-port, while a 12-port rotor/stator is attached on one side, and a 15-port rotor/stator is attached on the other. This results in a 12/10/10/15 tri-port siren, which has a distinctive, nearly musical sound. The siren originally had a 12/10/15/10 port configuration before 1936. The siren is driven by a bare dual-sided 2 hp AC motor, running at 50 Hz in either 1 or 3 ph. The siren resembles a dual rotor siren as each rotor and stator are thin enough to not require additional outer bearings. The siren includes a square-shaped stand below the siren for mounting purposes, which originally spanned the entire width of the siren, at least for 1 ph units. 1 ph units use an asymmetrical motor. A few of these sirens survive today in private possession and museums, with at least one in functional condition.

Type 1474

The Type 1474 (sometimes marked as Type ARP on the tag) is a medium-sized dual rotor siren that is one of the most well-known Gents' sirens, and closely resembles Carter and Castle Castings sirens in both appearance and sound. The Type 1474 was available in 10/12-port dual tone only as standard, driven by a dual-sided 4 hp AC motor running at 50 Hz, 1 or 3 ph. The Type 1474 is unique and distinctive in appearance, using conical-shaped stators. If this wasn't a purely stylistic choice, it was possibly an attempt to direct some of the sound towards the intakes. The Type 1474 was available with optional coding dampers similar to those used by the Klaxon CS8 and Federal Signal 3T22, which would allow it to create a pulse or hi-lo signal. These dampers would be included with extended, pointed intakes, and the solenoid mechanism was located underneath each intake. The stators are attached to the motor by four legs, with the rotor shaft in the middle. This is a similar configuration to the Sterling Model M. The siren has a rounded motor cover which shields the motor from the elements, and the siren includes a simple four-legged stand for mounting. The Type 1474 was the most successful model, and at least one remains in service today as an industrial fire alarm.

Type 1478

The Type 1478 is one of the most peculiar and unique sirens that was sold by Gents'. This siren uses a layout somewhat similar to that of Dillon Box's Denver sirens or Yamaha's Music Sirens, utilizing 4 separate rotors and stators, all connected to a single, long shaft coupled to the motor. The two inner rotors and stators are 12-port, while the two outer rotors and stators are 10-port. The Type 1478 uses the same rotors and stators as the Type 1474 and can be seen as a larger variant of one. The siren's dual-sided motor is located in the center and is 8 hp, running on 50 Hz AC, 1 or 3 ph. Due to the additional weight of the extra rotors/stators, the Type 1478 includes two additional bearings between each set of rotors/stators, held up by solid supports that also hold the stators. The motor and bearings are attached to a single long common frame, which makes the siren impossible to mount on a singular pole. Two eyebolts are attached to lift the siren onto a rooftop by a crane. Understandably, the Type 1478 was not very successful due to its large size and expense, and very few are known to exist today, none in working order.

Type 1479

The Type 1479 is the smallest siren in the Tangent lineup, being little more than an indoor industrial siren repurposed as an outdoor air raid siren. Intended to fill small coverage gaps, the Type 1479 is a single-rotor electric siren that uses an 8-inch 15-port rotor and stator, driven by a ⅒ hp AC motor at 50 Hz, up to 250 V AC. The Type 1479 is extremely simple in design, with the rotor and stator attached to one side of the motor. The motor itself is protected by a rounded motor cover, and a small stand is located below. Unlike all other Gents' sirens, the Type 1479 uses curved vanes on the rotor (similar to a B&M or Federal Q-Siren), which offers much better efficiency for the rotor's size.

Type 1480

The Type 1480 is a coded electric siren that was sold by Gents'. It was very similar to the Denver Duplex. The siren has an either a 10 or 12-port rotor and stator, driven by an exposed motor and connected to a brake mechanism which would allow the siren to quickly stop at a fast pace. Not much is known about these sirens, except their appearance and one location, which was located on the Fifth of Forth rivers until its eventual removal.

Type 1481

The Type 1481 was a coded electric siren that was sold by Gents'. It seems to be based on the design of the Type 1480 and Type 1478, instead utilizing 4 rotors and stators similar to the Type 1478, albeit with a 12/12/12/12 port single-tone configuration. The siren is driven by an exposed motor and connected to a brake mechanism which would stop the siren at a fast pace. No known examples exist to this day nor are any previous locations known as of now.

Model 1500

Main article: Chloride Gent Model 1500

The Model 1500, or "The Strident", is an indoor fire siren that was produced by Chloride Gent from sometime around 1975 to the early 2010s, when the company was acquired by Honeywell. Often used in large open areas or industrial spaces, the Model 1500 proved to be relatively popular, and many units can still be found today in the hands of collectors. It was the last siren branded under the Gent name after the Tangent sirens ceased production. More information can be found in the article linked above.