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Patents Completed.

7th February 1907
Page 22
Page 22, 7th February 1907 — Patents Completed.
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Which of the following most accurately describes the problem?

FRICTION CLUTCH.—Albion Motor Car Co., Ltd., and Another. — No. 7,848, dated 2nd April, 1906.—This invention is applicable to clutches of the "Weston" type, wherein two series of discs are employed, those of one series being alternated with those of the other and carried by the driving member, whilst the other series is carried by the driven member. According to this invention, each plate of one series has formed, in both faces, a series of pockets (A, B). In these, springs (C, D) are mounted so that they bear against plates (G) at either side of the other series, and serve to separate the same, when the clutch is released.

SILENCER. — Bishop. — No. 6,739, dated 21st March, 1906.—The exhaust is carried through the silencer by a spiral conduit (F) and, between the convolutions of the conduit, open spaces (M, N) are provided. The conduit (1') is expanded towards its delivery end and the exhaust, finally, escapes by peripheral outlets (K). The space (M, N) serves to allow the passage of air between the walls of the conduit (F), whereby the silencer is cooled_ The exhaust is ad• mitted to the conduit by a central inlet (G).

VALVE MECHANISM.—Mather and Platt, Ltd., and Another.—No. 948a, dated 13th January, 1906.—The inlet valves (1) are mounted on spindles (2) passing through the valve chambers, and are surrounded by helical springs (3) or like devices, which, normally, hold the valves (1) down on their seats. Above each valve spindle is placed a pair of rolling levers (4,5) with a nose on the under side of each lower lever (5) bearing on the top of the valve spindle (2) so that, when the lever (5) is depressed, the valve (1) is opened. As the inlet valves should

be open during about one quarter, only, of a revolution of the engine, and closed for the remaining three quarters, the sur• faces of the levers (4, 5) which are in contact, are shaped in suitable curves, so as to tend to produce a rapid movement of the valve spindle, on opening and closing, and, then, a prolonged pause for the remainder of the revo:ution. The two pairs of levers are connected by a rod (6), so as to work together with opposite movements, the one pair being closed when the other pair is open .3 they are operated through the connecting rod (7) by the one eccentric (8) on the crankshaft (9).

CASE-HARDENING FURNACE. — Machlet.—No. 11,069, dated 11th May, 1906.—The articles to be case-hardened are inserted in a metallic retort (2) and are indicated at 1. The retort is cylindrical in form, and is supported on rollers (24, 26) at each end. Surrounding the retort is a chamber (10) wherein a series of burners (19, 20) are mounted. The burners are so situated that the gases of combustion pass entirely round the retort and escape by an outlet (23). At one end of the retort is a partition (31) which receives the end of a feed conduit (49a), whereby the fluid for carbonising is admitted to the interior of the retort. The opposite end of the retort is closed by a cover (32) having in it a vent (50), whence the carbonising fluid, after having com

pleted its work, is allowed to escape while fresh fluid enters, continuously, during operation, by the conduit (49a). The cover (32) can be withdrawn by a screwthreaded spindle (33), and the righthand end of the retort can, then, be raised by a screw-threaded support (64). The articles, by thus tilt

ing the support, are made to slide from the end of the same, and, through orifices (36) and the flue (23), into a suitable receiver. The left-hand end of the retort is closed by a cover (35) which can be readily removed for charging. A worm (53) and worm wheel (56) are provided for slowly rotating the retort whilst in operation.

BRAKE DEVICE.—Millard and another.—No. 7,243, dated March 26th, 1906.

—The ends of the brake band (k) are connected to levers (e) pivoted at r. Between the levers is an operating rod (f), which carries an adjustable block (a). The rod slides through a frame member (d), and is surrounded by a spring (g), which, normally, maintains it in the inoperative position. The levers are so shaped that, as the rod is pulled forward, the blocks separate the free ends of the levers, and the opposite ends, connected to the brake, are, thus, forced together, and bring (he brake into operation.

FRICTION CLUTCHES. — Longbotham.—No. 3,753, dated 15th February, 1906.—The external clutch member (A)

has, mounted within it, a divided ring (B) operatively connected with a driving member (F). The member (F) carries screwthreaded spindles (I) which are connected by arms (K) to any suitable operating mechanism. Each spindle (I) is provided with a rightand left-hand screw-thread, and, on the free ends of the spindles, wedge-shaped blocks (C) are mounted. The blocks (C) engage guide plates (D) on the divided ring, and are connected thereto by screws (E) which slide in slots formed in the plates. When the arms (K) are operated in one direction, the blocks are thrust in between the two halves of the ring (13), and, thus, expand the same against the outer clutch member (A), whilst, when they are withdrawn, the screws (E) draw the two halves of the ring together and hold them free of the clutch member (A).

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