NEIMME: Lamps
No. 57.
MARSAUT LAMP.
The special features of this lamp are the Guy's pressed steel bonnet and the Ryder lock. This lock consists of a sliding standard which locks the oil vessel and the bonnet and is secured by a rivet. When the rivet is removed the standard can be pushed up allowing the oil vessel to be unscrewed. The standard can then be lowered allowing the bonnet to be unscrewed.
HISTORICAL NOTE.
Locks.
The first locks used on safety lamps were padlocks. These were easily picked, however, and from 1850 they were gradually replaced by more secure devices. The screw lock was introduced about 1841 and many types, both horizontal and vertical, have been used.
The lead rivet lock was introduced by Mackworth in 1854.
Magnetic locks were introduced by Wolf in 1883-5.
Pneumatic locks were introduced by Mr. Moore in 1896. These required an air pump for their operation.
No. 58.
MARSAUT LAMP.
Presented by T.E. Foster.
Made by Laidler, Durham.
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
Burner. 1/4 ins round wick.
Dismantling. The oil vessel unscrews and the bottom unscrews from the middle ring.
Lock. Screw lock on oil vessel.
When the oil vessel is removed a locking standard can be turned, which unlocks the bonnet which can then be unscrewed. It is therefore, impossible to remove the bonnet without first removing the oil vessel.
No. 58. A.
MARSAUT LAMP.
Made by Laidler, Durham.
In all respects but size this lamp is similar to No. 58.
No. 59.
MARSAUT LAMP.
Presented by T. Bell.
Made by Mills, Newcastle.
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
Lock. Screw lock (Similar to No. 50. But with different oil
vessel.)
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No. 62. Click to view image |
CONSTRUCTION.
A normal bonnetted Marsaut type of lamp.
The noteworthy feature is the device to facilitate gas measurement. It consists of a bridge, which has a hole in it for the flame. The bridge can be raised or lowered, by a thumb screw at the base of the lamp, so that it is set with respect to the flame in a manner suitable to the operator. A series of pointers projecting from the bridge help the estimation of the gas caps.
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No. 63. |
This lamp is made entirely of non magnetic material, the body of aluminium and the two 28 mesh gauzes of copper and is designed specially for surveyors use. It has the advantage, also, of being very light in weight.
It is fitted with a Guy pressed bonnet.
(See description of No. 57).
No. 64.
MARSAUT LAMP.
Made by Laidler, Durham.
The special features of this lamp are
(1) the deflector, somewhat similar to the Howat deflector (1885), which deflects the intake air after entering the middle ring upwards for 11/4 ins before it can pass through the gauzes to the flame.
(2) the 11/4 ins round wick tube is enclosed within an outer tube so that when the oil vessel is unscrewed the flame is extinguished. This is very similar to the Teale Protector Patent (1868).
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No. 64. A. |
This is similar to No. 64, except for the fuel and burner. Whereas No. 64 was oil burning this burns spirit. The fuel vessel is packed with sponge.
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No. 65. |
This is a typical Marsaut lamp which satisfied the requirements of the Coal Mines Act 1911. Lamps of this kind, by several makers, were and still are, commonly used.
It has two 28 mesh gauzes.
There is also a horizontal deflector between the bonnet and the outer gauze, two inches above the middle ring, which deflects the intake air downwards
No. 66.
MARSAUT LAMP.
Presented by Patterson & Company.
Made by Patterson, Newcastle upon Tyne.
This is another 'approved' Marsaut type of lamp, with two 28 mesh iron gauzes.
HISTORICAL NOTE.
There are many 'approved' lamps, of different sizes and patterns. Nearly all lamp makers produce several types, with features to suit particular requirements and tastes. The 'type B.1' on this lamp is a maker's distinctive mark. It is not a 'type' number in the historical sense.
No. 67.
MARSAUT LAMP.
Made by Patterson, Newcastle upon Tyne.
(Type D2).
The special features of this lamp are
(1) the slide which enables the air inlet holes under the middle ring to be closed.
(2) The magnetic lock for the oil vessel.
(3) The electrical ignition.
(4) The pillar lock for the bonnet.
(5) The aluminium frame and bonnet, to reduce weight.
No. 68.
MARSAUT LAMP.
Presented by Patterson and Company.
Made by Patterson, Newcastle upon Tyne.
(Type A3).
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
Burner. 1/2 ins flat wick.
Lock. Bonnet by pillar lock.
Oil vessel by lead rivet.
There is a horizontal deflector between the bonnet and outer gauze 2 ins above the middle ring to deflect the intake air downwards through the gauzes.
No. 69.
MARSAUT LAMP.
Presented by Patterson and Company.
Made by Patterson, Newcastle upon Tyne.
(Type B7).
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
Burner. ? ins flat wick with porcelain mounting, to give better
directional air supply to the flame and better candle power.
Ignition. Electrical.
Lock. Magnetic.
No. 70.
MARSAUT LAMP.
Presented by Patterson and Company.
Made by Patterson, Newcastle upon Tyne.
(Type A1).
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
Locks. Pillar lock for bonnet.
Magnitic for oil vessel.
Burner. 1/2 ins flat wick with porcelain mounting.
There is a deflector between bonnet and outer gauze 2 ins above the middle ring.
No. 71.
MARSAUT LAMP.
Made by Ackroyd and Best, leeds.
CONSTRUCTION.
Gauzes. Two 28 mesh iron.
There is a horizontal deflector between the bonnet and the outer
gauze 2 ins above the middle ring.
Burner. 1/2 ins flat wick with Hailwood's patent porcelain mounting and
snuffer.
Ignition. Electrical.
Lock. Magnitic.