Patents Completed.
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VARIABLE SPEED GEAR.—Ahlquist. —No. 20,791, dated 19th September, 1906. —The driving shaft (I) transmits rotary motion to the driven shaft (3) through the medium of a spur wheel (2), step spur gear cones (5, 6), and a spur wheel (4). The gear cones have three steps corresponding to three different speeds, each having gear paths connected by right, or left, hand spiral, or volute, gear paths running from one gear circle to the other, so that an unbroken succession of teeth connects the different steps. The axles of the gear cones (5, 6) are carried in bearings which can move in parts of a circle, with the centre line of the driving shaft as centre. It will be seen that, if the gear cones are moved in the circular path, and, at the same time, moved in a longi tudinal direction, a variable speed will be obtained.
RESILIENT WHEEL.—Charlet.—No. 7,907, dated 4th April, 1907.—The rim (1) of the wheel carries clamps (2) at its inner side wherein the ends of flat springs (4) are secured. The opposite end of each spring is pivoted by means of bolts (7) on the ends of two parallel bars (5, 6). The end of each link, or suspension bar (5, 6), carries a double, oppositely-bevelled pivot-pia (10) extending into the bearing formed, on one hand, by a recessed disc (11), and secured by means of screws (12) to a projecting collar (18). It will be seen that the huh of the wheel may be rotated in relation to the rim, to a certain extent, in either direction, this being required to prevent the elastic spokes from becoming broken in certain cases.
STARTING CONTROL DEVICE,— Dadge.—No. 20,937, dated 22nd September, 1906.—In order to prevent the engine being started while in gear with the wheels of a car, the ignition switch (1) is only permitted to become operative when the change-speed lever (22) is in the nen. tral position. The ignition switch lever (1) has a tooth (6) which is adapted to engage a detent (7) pivoted at 8 to the base (3). This detent is controlled by an electro-magnet (10), which, in turn, is con. trolled by contact pieces (23, 24). It will be seen that, when the change-speed lever (22) is in the neutral position, as shown by the dotted lines, the circuit controlling the electro-magnet (10) will be closed, and, consequently, the arm (9) of the detent If) will be drawn on to the magnets, thus permitting the switch lever (1) to become operative.
LIQUID FUEL BURNER.—Clarkson. —No. 19,105, dated 27th August, 1906.—
This invention relates to burners of the type in which fuel is passed through a vaporising coil before it is burnt. A number of burners (E), of the Bunsen type,
are arranged round a hollow boss (A), and are connected thereto by tubes (D). A fuel coil (Cl) is carried above the burners, on suitable brackets, and it terminates in the boss (A). This boss is divided into two chambers (A4, At) by a strainer (B) having sawcuts (B1) in its upper end, and holes (BS) in its lower end, Fuel flowing through the coil (O1) passes into the chamber (At), through the strainer (B), into the chamber (A4), and thence through the tubes (D) to the burners (El.
JOINTS FOR MOTOR SHAFTS.— Humphris.—No. 17,890, dated 9th August, 1906.—The driving shaft (1) is connected to the driven shaft by a universal joint (3) comprising a ball having grooves arranged at right angles to one another, and engaging forks (6), mounted on the
ends of the shafts. Torque rods (12) are provided, pivoted at 13 to the brackets (14) extending from the chassis. The important feature of these torque rods is that their radius about their pivots is of the same length as that of the section (2) of
the engine shaft about its pivot (3), and these pivots (13, 3, 13) are all in the same transverse line.