1
A relief valve device for maintaining constant pressure. Alexander Bannatyne Stewart La, October 28, 1935: GB437327-A (5 worldwide citation)

437,327. Relief valves. LAIDLAW, A. B. S., Calderwood Cottage, Lasswade, Midlothian. Jan. 21, 1935, No. 2011. [Class 135] A relief valve for oilburning and like fluidcirculating systems wherein a predetermined pressure is maintained, comprises two pistons 8, 12 of different area arranged in a common ...


2
Electrical alarm system suitable for boilers. Alexander Bannatyne Stewart La, November 16, 1937: GB475248-A (2 worldwide citation)

475,248. Indicating liquid levels. LAIDLAW, A. B. S. March 31, 1937, No. 9186. [Class 123 (i)] In a high and low water alarm for boilers, circuit-breakers H and L operating at predetermined levels are connected to a panel A, so that when the level is correct both contacts are made and a green light ...


3
Improvements in means for generating steam and combustion products under pressure for power purposes. Eric Summers Drew, Alexander Bannatyne Stewart La, July 21, 1924: GB219377-A (1 worldwide citation)

219,377. Drew, E. S., and Laidlaw, A. B. S. April 20, 1923. Steam-pressure sprayers.-In apparatus for the production of a mixture of steam and combustion products by burning fuel in the presence of sprayed water in a closed container as described in Specification 203,726, the water sprayer comprises ...


4
Improvements in liquid fuel burners. Eric Summers Drew, Alexander Bannatyne Stewart La, July 21, 1924: GB219378-A (1 worldwide citation)

219,378. Drew, E. S., and Laidlaw, A. B. S. April 20, 1923. Spray burners. - A liquid fuel spray burner comprises coaxial air and fuel tubes a, b, the fuel tube b having a detachable screwed end j which is formed with external threads k for whirling the air and carries an adjustable screw l having a ...


5
Fuel/combustion-air ratio control means for furnaces. Alexander Bannatyne Stewart La, George Patrick Eadie, February 8, 1956: GB744426-A (1 worldwide citation)

744,426. Fluid-pressure servomotor-control systems. LAIDLAW, A. B. S., and EADIE, G. P. Sept. 7, 1954 [Sept. 7, 1953], No. 24741/53. Addition to 703,353. Class 135. In regulating means for maintaining a predetermined relationship between the fuel and combustion air supplies to a furnace, as claimed ...


6
Improvements in feed water regulators for boilers and evaporators. Alexander Bannatyne Stewart La, May 31, 1948: GB602593-A

602,593. Fluid-pressure servomotor-control systems. LAIDLAW, A. B. S. Feb. 19, 1945, No. 4191. Addition to 537,788. [Class 135] The rate of lift or opening movement of the balanced boiler feed valve described in the parent Specification is controlled by means of a resiliently mounted piston ring wit ...


7
Regulating means for combustion air to a fuel burner. Alexander Bannatyne Stewart La, George Patrick Eadie, February 3, 1954: GB703353-A

703,353. Fluid-pressure servomotor-control systems. LAIDLAW, A. B. S., and EADIE, G. P. April 27, 1951 [Jan. 27, 1950], No. 2251/50. Class 135 Means for regulating' the supply of air to a furnace comprises: pressure responsive members respectively connected to the fuel and air systems; actuating mea ...


8
Improvements in feed water regulators for boilers and evaporators. Alexander Bannatyne Stewart La, July 7, 1941: GB537788-A

537,788. Fluid-pressure servomotors. LAIDLAW, A. B. S. Jan. 6, 1940, No. 369. [Class 135] The flow of steam to a relay valve 10 controlling a boiler feed valve c is regulated by a float 7 in a chamber 5 connected by pipes 4. 6 to a stand pipe 1 in communication with the boiler steam and water spaces ...


9
Improvements in or relating to valve actuating mechanism. Alexander Bannatyne Stewart La, August 9, 1938: GB490081-A

490,081. Fluid-pressure servomotorcontrol systems. LAIDLAW, A. B. S. April 16, 1937, No. 10937. [Class 135] In a fuel-burning system the rate of combus. tion is maintained constant under control of a thermostat C which regulates a fuel leak-off valve L. The thermostat may be replaced by a pressure o ...


10
Improved boiler feed water control means. Alexander Bannatyne Stewart La, June 14, 1929: GB313976-A

313,976. Laidlaw, A. B. S. March 14, 1928. Feedwater, controlling. - A balanced by-pass valve 4 in the feed pipe 5 is controlled by a relief valve 18 operated by a diaphragm or like device 2 arranged above the boiler and subjected on one side to the varying pressure, in a pipe 8 opening at the norma ...