30 AIRCRAF T ENGINEERING January, 1934 A Selection of the More Important Aircraft and Engin e Specifications Published Recently 395,901 . Flash-arresters for carburettors. delivered through passages 24, 25, 26 and past a a plate p when the wheel frame is retracted . One or Eyssartier, G., Villa Chardon Bleu, Rond-Point non-retur n valve 21 which, during the opening two additional struts s, t, similar to th e stru t r, may Deganne , Arcachon, Gironde, France. Sept. 27, movemen t of the valve gear, becomes seated be used in the fore-and-aft plane, or two struts may 1932, No. 26859. Convention date, Oct. 8, 1931. owing to its inertia on a shoulder 20, the lift of brace the frame a at 45 deg. to the longitudinal [Class 7 (iii).] th e valve being restricted by a stop 22. The plane . Fig. 6 shows a modification in which the inward movement of the plunger 16 is limited by bracing struts s, t, are moved into engagement with A device for preventing fire due to back fires a shoulder 27, th e height of which may be adjusted notches in spring-pressed arms a1, b1. Cables pt, from internal combustion engines comprises a b y placing shims thereon. The outward move q1 connected to levers l1, m1, on the strut s disengage chambe r 1 which is fitted to the air inlet of the men t is restricted by a pin 30 engaging a recess th e strut ends from the notches before collapsing carburettor . The chamber is fitted with baffles in the plunger, and rotation of the plunger is pre th e struts against the wheeled frame a. 3 , 4 which form pockets facing towards the car vented by a flat 28. Air trapped in the recess buretto r and the free edges of escapes through a flat formed along one side of 396,900 . Airscrews. Bendix Aviation which overlap or lie in the same th e plunger. The poppet valve 21 may be re Corporation, 105, West Adams Street, Chicago, vertical plane. The baffles are placed by a ball valve seating with line contact, U.S.A.. May 28, 1932, No. 15210. Convention spaced sufficiently to ensure passage as shown at 36 in Fig. 6. The oil in the recess date , May 29, 1931. [Class 114.] of the entire normal supply of air ma y be used to lubricate the cam, for example Variable-pitch airscrews of the kind wherein the to the engine, even if rime, etc., is by means of passages 58, 59, 60. In a modifica pitc h is varied in accordance with the longitudinal deposited in the chamber. In tion, the ball valve seats upon a cup member displacemen t of the boss on the driving shaft are modifications, additional bafiles are secured in the hollow plunger 56, the oil passing provided with an additional driving connection arrange d centrally of the chamber. between the cup member and plunger, and through Th e bafiles may be perforated. a hole at the bottom of the plunger, on to the British Specification 363,349 and cam . Frenc h Specification 696,265 are referred to. 396,577 . Valves. Wilcox-Rich Corporation 9771, French Road, Detroit, Michigan, U.S.A.— 396,355 . Valve gear. Halford, F. B., 9. (Assignees of Jardine, R. ; 9771, French Road, Golden Square, London. April 4, 1932, No. Detroit , Michigan, U.S.A.) Oct. 7, 1932, No. 14878/33. Divided on 394,777. [Class 7 (vi).] 27961. Convention date, Oct. 14, 1931. [Class 7 (vi).] A valve, more particularly a hollow poppet valv e for internal-combustion engines, is formed by drilling out a steel blank 16, inserting a rod 19 of copper or other ductile material having a lower melting-point than that of steel, forging the closed end 17 so as to form the valve head 22, Fig. 3, an d then heating until the core of copper, etc., melt s and runs out, leaving the hollow stem, into which a cooling-medium, such as lithium, sodium, or potassium, or a mixture of their nitrates, ma y be the n introduced. In a modification, the steel blank In valve gear of th e type in which the operating- thrus t is transmitted from one moving member to anothe r through a column or pad of liquid admitted pas t a non-return valve to a space between such members, a stop is provided for restricting the lift of the non-return valve to a very small amount is nearly as wide as the valve head, and the stem is produced by forging down the blank and core to a smaller diameter. 396.609 . Aircraft landing-gear. Dornier Metallbaute n Ges. and Dornier, C , Friedrichshafen, Lake Constance, Germany. Dec. 23, 1932, No. 36497. Convention date, Feb. 19. [Class 4.] Landing-gear for aircraft of the kind comprising between the boss and the shaft which takes par t of a wheeled frame adapted to be turned laterally th e driving torque. The hu b 11 has a fixed splined abou t a longitudinal pivot until it is housed within connection with the driving shaft 7 and externally a recess in the wing has one or more strut s movably ha s a sliding ball-race connection 16 with the connected to the wheeled frame so as to lie close grooved hub 8. The hub has sockets 9 carrying the agains t it when the frame is housed in the wing. roots of the blades 10 and the whole complete pro A forked member a, Fig. 5, pivoted at d, has its peller is adapted to be movable longitudinally uppe r end c guided between cheeks f an d is adapted unde r th e restraint of springs 31 up to limit stops 33 . t o be braced against a stop g when a hinged strut % I n addition to taking the torque through the ball- is moved by a cable l against a wedge surface o. races 16, an external drive is obtained by means of Th e strut i is collapsed against the frame a by arm s 25 attached to a boss 24 secured to the shaft, a cable m before raising the frame into th e wing b y a which arms have connection at 40 with rings 41 on cable k. The opening in the wing is closed by corresponding to the clearance normally allowed th e outer parts of the hub sockets. Complete for engine tappets. Fig. 1 shows a cam-actuated connection is mad e by a coupling pivoted a t 40 and rocker 12 in which the cam engages a plunger 16 a t 27 through two members 36, 38 which are longi sliding in a recess in the rocker, to which oil is tudinall y free but under spring restraint 44 and also ar e relatively free rotationally. The same levers 25 ar e also connected by other pivotal members 27, * These abstracts cf complete specifications of Patents recently ublished are specially compiled, by permission of H.M. Stationery 28 with rings 18 attache d to the blade roots so tha t ffice, from abridgments which arc issued by the Office classified on relative movement of the hu b to the shaft, these into groups. Sets of group abridgments can be obtained from levers effect a change of pitch. The ring members the Patent Office, 25 Southampton Buildings, London, W.C.2, either sheet by sheet as issued, on payment of a subscription of 18 ar e provided with enlargements 35, th e centrifugal 5s. per group volume, or in bound volumes at 2s. each. Copies of forces on which arc designed to balance the torsion the full specifications can be obtained from the same address, of the air forces acting on the blades. In a modifica price 1s. each. tion the ball-races 16 include tongues which project Except where otherwise stated, the specification is unaccom int o the boss and take par t of the drive. panied by drawings if none is reproduced.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Jan 1, 1934