AIRCRAF T ENGINEERING February, 1938 Some Recent Patents of Aeronautical Interest Granted in the U.S.A. 17. In an altimeter having a pointer, a scale an d a pressure-sensitive device for operating the pointer in accordance with changes in altitude, a rock-shaft adapted to be actuated by said pressure- sensitive device, a pointer shaft, means for setting th e altimeter for a predetermined altitude, a planetar y differential gear train drivably connecting said rock-shaft and pointer shaft whereby relative movemen t may be produced between the pointer and scale separately by the operation of said rock- shaft and said setting means, said gear train com March 4, 1935. Serial No. 9,236. 1 Claim. [Cl. prising a pair of planet gears in constant mesh 170—162.] with each other, a planet pinion carried by each of said gears and rotatable therewith, a frame on A variable-pitch propeller comprising a tapered which said planet gears and pinions are journaled, conical hub having a front pocket and a rear an operating shalt drivably connected to and chambe r portion, a propeller shaft terminating actuate d by said rockshaft and rigidly connected with a flange for closing the hub chamber, means to said frame. for securing said flange to the hub, the surfaces of said hub and flange being routed to form radial bearings, blade stems journaled in the bearings, 2,099,467 . Altimeter. Victor E. Carbonara, cams carried by each stem disposed in the rear Rockville Centre, N.Y., assignor to Bendix Aviation chambe r portion, said cams being oppositely dis 2,098,947 . Cowl for air-cooled aircraft en Corporation, South Bend, Ind., a corporation of posed relative to each other, a pressure plate gines . Alfred Hubert Roy Fedden and John Delaware. Application November 5, 1932. Serial mounted in said chamber portion engageable with William Copley, Bristol, England, assignors to The No. 641,446. 6 Claims. [Cl. 73—4.] th e cams, a follower plate in said chamber portion, Bristol Aeroplane Company, Ltd., Bristol, England, an expansion spring disposed between the plates, 6. An altimeter comprising a pressure-responsive a British company. Application July 23, 1936. an adjusting screw extending through the hub device responsive to changes in altitude, a fixed Serial No. 92,188. In Great Britain August 9, pocket into the chamber and engageable with the suppor t for said pressure-responsive device, actuator 1935. 4 Claims. [Cl. 123—171.] following plate, and a head cap in threaded union means including a pair of plates having an arcuate 1. A cowl for an air-cooled aircraft engine with the hub pocket serving as a closure therefor. bridging member there—between spacing them apart, comprising a series of rearwardly-extending plate said plates being rotatively mounted on said fixed like flaps entirely separate from the cowl, a pair support, a shaft operated by said pressure-re of rearwardly-extending arms associated with each 2,100,353 . Production of Hydrocarbons of sponsive device and journaled in and between said flap one at each margin thereof, a pair of longi Lo w Boiling Point. Mathias Pier, Heidelberg, tudinal flanges on the side of each arm adjacent and Ernst Donath, Mannheim, Germany, assignors the flap so as to form a groove between them of to 1. G. Farbenindustrie Aktiengesellschaft, Frank- which grooves at least one is of greater width fort-on-the-Main, Germany. Application May 2, tha n the thickness of the margin of the flap which 1934. Serial No. 723,502. In Germany, May 19, can thus slide in at least one of said grooves, said 1933. 1 Claim. [Class 196-53.] margins being supported within said grooves, the A process for cracking a heavy hydrocarbon oil circumferential distance between the flanges on one into lower hydrocarbon products, which comprises ar m and the flanges on the other arm being sub continuously passing a hydrocarbon oil which boils stantiall y less than the corresponding dimension predominantl y above 325 deg. C. and which is of the flap at all operating positions of the arms capable of being cracked into low boiling hydro an d the circumferential distance between the base carbons together with a small amoun t of a suspended of the groove on one arm and the base of the finely divided sulphur-immune splitting and hydro- groove on the other arm being greater than the genatin g catalyst and an amount of added hydrogen, corresponding dimension of the flap, whereby the sufficient to prevent excessive coking and poly flap is supported solely by the arms a t all operating merisation, but so regulated that less tha n 100 litres positions thereof despite its being entirely separate of hydrogen for each kilogram of normally liquid from the cowl, a pivot for each arm lying along an produc t leaves the reaction chamber, completely axis at right-angles to a fore-and-aft central plane, through a reaction zone maintained under a temper and driving mechanism carried by a fixed part of atur e and pressure suitable for cracking in th e liquid the cowl and operatively connected to each said phase, continuously discharging the entire reaction arm to rotate it about said pivotal axis. mixtur e together with the suspended catalyst plates and being revolvable therewith about the while still under reaction pressure from the reaction common axis thereof in addition to being rotatable zone into a separating zone, continuously with on its own axis relative to said plates, a pair of 2,099,466 . Altimeter. Victor E. Carbonara, drawing vaporous products from said zone and pointers rotatably carried by said fixed support Rockville Centre, N.Y., assignor to Bendix Aviation separatel y withdrawing liquid products containing an d operatively connected by said shaft to the Corporation, South Bend., Ind., a corporation of suspended catalysts from said zone, releasing the pressure-responsive device for actuation thereby in Delaware. Application June 9, 1932. Serial No. pressure on said liquid products whereby due to the a predetermined ratio, dial means for said pointers 016,322. 60 Claims. [Cl. 73—4.] sensible heat contained in said products lower boil an d having scales calibrated in the ratio of the ing oils, including gas oil, are removed as vapours pointers, means including a worm gear on the therefrom, combining said vapours with products arcuat e bridging member of the plates, a worm, withdrawn in vaporous form from the separating and a knob adapted to be operated from the zone, subjecting the mixture to a fractionating exterior of the altimeter for actuating the worm operation, recovering a gas oil from said fraction and worm gear to cause angular movement of said atin g operation and returning said gas oil to the plate s thereby revolving the shaft about the axis reaction zone as part of the charging stock contain of said plates for operating the pointers to set the ing fresh catalyst. altimete r for a predetermined altitude or baro metric pressure whereby said pointers indicate zero on the scales when the predetermined altitude is reached or the barometric pressure occurs, and a reference indicating device behind the dial means an d viewable through an opening in the latter, said reference indicating means being operable with the pointers during setting of the altimeter and inoperable during operation of the pointers b y the pressure-responsive device for indicating th e predetermined altitude or barometric pressure for which the altimeter has been set. * The above abstracts or patents granted in the United States are taken, by permission of the Department of Commerce, from the Official Gazette of the United States Patent Office. Printed copies of the full specifications can be obtained, price 10 cents each, from the 2,099,922 . Screw propeller. Edward Law Commissioner of Patents, Washington, D.C., U.S.A. rence Bellman, Rockford, Ill., assignor of one-half Except where otherwise stated, the specification is unaccompanied t o Elmer W. Johnson, Rockford, Ill. Application by drawings if none is reproduced.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1938
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