Quadrant
The Quadrant Co. will list four models for 1912 - a clutch, three-speed, racing, and lady's model. In the first two cases, except, of course, for the rear hub, the machines will be identical, and will have a modification of this year's engine. The radiating fins have been removed from the inlet port and an improved adjustable pulley has been fitted.
The new racing type is fitted with an engine of 87 bore x 80 stroke, and the lady's machine, which we hope to illustrate shortly, will have an engine of 70x76 mm.
A very interesting silencer, illustrated on this page, is fitted to the 1912 Quadrants. It consists of a plain expansion chamber the exit from which is through a valve kept on its seat by a light spring. It is claimed that the action of this valve causes a partial vacuum in the expansion chamber after each explosion, thereby increasing the speed and power of the engine considerably.
1911 Olympia Show - The Motor Cycle September 28th, 1911.
QUADRANT, Nos. 93 and 94.
"Quadrant," Lawley Street, Birmingham. – The Quadrant engine is a distinct departure from the standard. The exhaust valve is at the side and the exhaust chamber is surrounded by deep radiating fins. The inlet valve is at the rear and without fins, the sparking plug being inserted above the inlet valve. The magneto is neatly placed behind the engine, well out of the way of the elements. A further feature of the engine is the clean and smooth exterior of the crank case. A small bore pipe conveys oil spray from the crank case to the combustion chamber. The down tube of the frame is gracefully curved, and the top tube is dropped away at the rear. The foot brake pedal is carried on a separate stud. Handle-bar control is provided to the magneto. One model is shown provided with the Armstrong three-speed gear, while on all types the design of the lamp bracket is worth inspection.
This is a particularly neat-looking machine, with gear-driven magneto placed behind the engine. Like most of the other models, it is finished in French grey, and is of a particularly pleasing appearance. Side shields are fitted to both rear and front mudguards. A separate belt rim is provided for the rear brake.
A 4 h.p. model is shown fitted with an Armstrong three-speed gear, wide petrol tanks, comfortable pan seat, and is a sensible touring mount of attractive appearance and excellent design. This machine is enamelled in black. A T.T. model is also shown.
1911 Olympia Show - The Motor Cycle November 23rd, 1911.
LADIES' QUADRANT, Nos. 93 and 94.
On Monday morning a lady's model Quadrant (70 x 76 mm.) arrived. It has mechanically operated valves side by side. This is quite a practical open frame machine. The tank is carried at the top of the loop frame, and from its lower extremity to the saddle tube extends a flap which protects the skirt from the engine, and, since the latter is exposed to the air all round the cooling draught is not interfered with in any way. An Armstrong three-speed gear is fitted, also handle-bar control to the magneto.
1911 Olympia Show - The Motor Cycle Nov 23rd 1911.
7 h.p. Model (twin-cylinder, V type): 87x95 mm.; overhead inlet valves, m.o.; B. and B, carburetter; chain; two-speed gear.
Quadrant Co., Lawley Street, Birmingham.
This fine sidecar machine is the attraction on the Quadrant stand. The engine is well up to its work and is an entirely new design with the magneto carried at the rear. The frame is sturdily built, and the chains have neatly designed guards.
The gear is mounted in the counter-shaft, and is of the selective clutch type, whilst handle starting is provided. Underneath the left footboard, a long silencer of big capacity is located. A new form of spring fork makes its first appearance.
Single-cylinder models, on much the same lines as the twin, but with belt drive, are also exhibited. One is pleased to note that the Quadrant retains the excellent characteristic of a smooth crank case, rendering the cleaning operation much more simple, and, generally, the new Quadrants appear very workmanlike designs. They embody up-to-date practice throughout.
The Quadrant Co., of Lawley Street, Birmingham, are manufacturing a large twin - cylinder engine for passenger work. It has the cylinders set at 50° and a bore and stroke of 87x95 mm. respectively. The inlet valves are placed over the exhaust and are particularly simple to remove. The design of the engine is characterised by its simplicity and strength. The operation of the valve gear will be observed from the illustration reproduced. A straight induction pipe is used with the carburetter, placed exactly central.
This new engine is to be fitted to a chain-driven bicycle with change speed gear, and should then make a fine machine for passenger work.
The original Quadrant Co. was one of the first firms in this country to take up the manufacture of motor cycles, and it is pleasing to note that, despite vicissitudes, the name Quadrant is still to the fore.
The Motor Cycle November 7th, 1912. Page 1255
