Improvements in flow combiner or precision apparatus for blending liquids

    公开(公告)号:GB648091A

    公开(公告)日:1950-12-28

    申请号:GB3014748

    申请日:1948-11-19

    Abstract: 648,091. Mixing appliances. SIMMONDS AEROCESSORIES, Inc. Nov. 19, 1948, No. 30147. Convention date, Aug. 3. [Class 86] In apparatus for combining in predetermined proportions a plurality of liquid streams, each stream is fed into a common receiver through a pair of metering gears, the pairs of metering gears being connected together and driven by a pair of motor gears placed in the stream of one of the liquids at a point in advance of the metering gears. In Fig. 1 a stream of liquid A flows, at a rate determined by a metering device 30, into a pipe 32 and a portion of this stream is directed into a casing, not shown, containing a pair of motor gears 16 and 18, of which the gear 16 through a shaft 20 drives pairs of metering gears 26 and 28, 26a and 28a, 26b and 28b contained within casings such as 29, Fig. 2. The stream of liquid A and streams of liquid B and C are fed by pipes 34, 12 and 14 respectively into the sets of metering gears which deliver the liquids into a common receiver 44 in proportions determined by the dimensions of the gears. Pressure drop across each pair of metering gears is eliminated by balancing valves 36, 36a and 36b which contain double ended pistons 48 displacable to increase or decrease the opening leading to the metering gears until the pressures on both sides of the gears have been equalised.

    Improvements relating to reciprocatory pumps

    公开(公告)号:GB808454A

    公开(公告)日:1959-02-04

    申请号:GB3284956

    申请日:1956-10-27

    Abstract: 808,454. Reciprocating pumps. S.U. CARBURETTER CO. Ltd., and SIMMONDS ACCESSORIES Inc. Oct 17, 1957 [Oct. 27, 1956], No. 32849/56. Class 102(1) In a pump of the type described in Specification 552,547 the valve may be temporarily reorientated about its centre of rotation so that the liquid discharged from the pump chambers is returned to the inlet of the pump. The internally toothed annulus 30 co-operating with the valve is provided with external teeth 31 engaged by a gear 32, so that it can be partially rotated and the valve seat 14 is provided with grooves 42 communicating with the inlet and with which the arcuate parts 25 in the valve communicate when the valve is reorientated. The gear 32 may be connected to a diaphragm influenced by the inlet manifold pressure of an I.C. engine, the pump being the fuel injection pump thereof, or be manually actuated.

    Improvements in flow divider apparatus for dividing a liquid into a plurality of streams of equal or related flow rates

    公开(公告)号:GB666238A

    公开(公告)日:1952-02-06

    申请号:GB2964048

    申请日:1948-11-15

    Abstract: 666,238. Fuel systems. SIMMONDS AEROCESSORIES, Inc. Nov. 15, 1948 [May 18; 1948], No. 29640/48. Class 7(iii) [Also in Groups XXIX and XXX.III] A flow divider, which may be used for supplying fuel to aircraft engines, for dividing a stream of liquid under pressure into a plurality of streams having predetermined rates of flow comprises a pair of intermeshing motor gears mounted for rotation in a housing, a plurality of pairs of intermeshing metering gears, a housing for separately enclosing each pair of the metering gears, a driving connection between the pair of motor gears and each pair of metering gears for driving the latter, means for delivering the liquid to be divided to the pair of motor gears to effect their rotation and the rotation of the metering gears, means for conducting liquid passed through the motor gears and for distributing it to the pairs of metering gears, a conduit leading from each pair of the metering gears for delivering a divided portion of the liquid and a control valve for the liquid conducted through each pair of metering gears arranged to control the pressure differential of the liquid between the inlet and outlet of the pair of metering gears. As shown liquid is supplied under pressure through a conduit 26 to a housing 28 associated with a pair of gears 10, 12 and flows through the gears to the opposite side of the housing. The gears are rotated and the gear 10 drives a shaft 14 to which it is keyed. The gear 12 is mounted for rotation on a shaft 16. On the shafts 14, 16 are arranged the number of pairs of gears for which the apparatus is designed. As shown there are two pairs 20, 22, 20a, 22a. The gears 20, 20a are keyed to the shaft 14 and respectively drive the gears 22, 22a. Liquid from the housing 28 flows through a conduit 30 to the inlet sides of housings associated with each pair of gears, valves 34, 34a, being interposed between the conduit and the housings. The delivery from the housings passes to conduits 36, 36a which may. for example, be connected to similar actuating cylinders of a pair of landing flaps ofan aircraft. The valves 34, 34a may be either in the conduits leading to or from the pairs of metering gears. They are similarly arranged and only the valve 34 will be described. It comprises a piston -valve member 48 acted on above and below by springs 60, which may be compression or tension springs. A spring may be applied to one end only of the valve if desired. A space above the valve is connected by a conduit 40 to the delivery side of the gears 20, 22 and a space below the valve'is connected to an inlet conduit 33 of the gears. The valve casing is connected to the conduit 30 by means of a conduit 32 and to the inlet side of the gears by means of the conduit 33. The springs for the control valves are adjustably loadable and may be used to equalize flow from the metering gear units. Initially, there may be unequal flow because of temperature influences or because sets of metering gears or housings were not .machined or cast exactly alike. The piston 48 for one unit, for example, is therefore unbalanced to the necessary extent to produce enough leakage around or pressure difference across the pairs of metering gears to make the flow equal to that for another unit. Unequal flow having a known relationship may be obtained in the same manner if desired. The pairs of motor gears are preferably made with a slightly smaller capacity than that of the aggregate of the driven metering gears. The necessary extra liquid for the pairs of metering gears is made up by providing a byepass duct or line 68 and orifice 70. The parts of the apparatus may be included in a compact block of assembled sections. The liquid delivered through the inlet line may be divided into any convenient number of equal parts for delivery to an equal or lesser number of operating stations for the supply of fuel or liquid to engines of any kind, or for other purposes. In some cases the metering gear units need not be of identical widths but may bear any desired relationship to each other in width or capacity. The metering gears need not be driven at the same rate as the motor gears, and the relative sizes and,/or speeds of the pairs of metering gears may be varied. While all pairs of gears are preferably mounted on a pair of shafts as described the metering gears may be driven by other types of driving means. It is stated specifically that the output of the motor gears could be divided into nine separate streams.

    Liquid-fuel metering distributors for internal combustion engines

    公开(公告)号:GB708592A

    公开(公告)日:1954-05-05

    申请号:GB1282052

    申请日:1952-05-21

    Abstract: 708,592. Dispensing measured quantities of liquids. S. V. CARBURETTER CO., Ltd., and SIMMONDS AEROCESSORIES. Inc. March 30, 1953 [May 21, 1952], No. 12820/52. Class 106(5) [Also in Group XXVII] A liquid fuel metering distributer for supplying the fuel-injection nozzles of internal-combustion engines comprises a rotary disc valve 7A, Figs. 3 and 4, having an epicyclic motion under control of which one or more distensible metering chambers 12, 13 of adjustable volumetric capacity, are charged periodically with pressurized fuel and, at recurrent intervals. caused abruptly to contract and thereby rapidly eject their fuel content to a delivery outlet. In Figs. 3 and 4 the valve 7A is pressed against the end of the distributer casing 1 by a spring-loaded metering block 3 and is rotated by an eccentric 10 on a driving shaft 11 so that it rolls with epicyclic motion around a ring gear 9 on the casing 1 with which it is in mesh through teeth 8. Fuel supplied by a pump 25 to an inlet 27 enters the metering chamber 12, 13 when their inlets 23, 24 are uncovered by the epicyclic motion of the valve 7A, to force spring- loaded pistons 14 therein down against stops 17 which may be adjusted simultaneously by a gear wheel 19 to adjust the effective volume of the metering chambers. The charge of fuel in each metering chamber 12, 13 is discharged to its associated injector N 1 , N 2 under the force of the springs 15 when ports E 1 ...E 8 in the valve place the metering chambers ports 21, 22 in communication with the outlets C', C 2 , leading to the injectors. Each part E 1 ... E 3 has a cycloidal motion and in Figs. 3 and 4 the ratio of the pitch circle diameters of the gears 9 and 8 is 9:8 so that for each revolution of the driving shaft 11 the valve 7A rotates upon its axis through one-eighth of a revolution. A resilient sealing ring 30 seals the space between the .block 3 and the .casing 1, ..and the spring-loading of the pistons may be replaced by hydraulic loading. In a modification, each metering chamber is associated with two fuel injectors and in a further modification the block 3 is integral with the casing 1 and the valve 7A is urged into contact with the block by a spring. In Fig. 6, a single metering chamber 12 supplies two nozzles N 1 , N 2 and the fuel is supplied alternatively to opposite sides of a free piston in the chamber 12, so that for example the fuel supplied to the top of the piston through the port 23 drives out the fuel in the space below the piston through a passage 34 to the injector N 2 , the return of the piston under the force of fuel supplied to the passage 34 forcing the fuel above the piston to the injector N 1 . Specification 552,547, [Group XXVII], is referred to.

    Improvement in self-aligning bearing structures

    公开(公告)号:GB568117A

    公开(公告)日:1945-03-19

    申请号:GB288744

    申请日:1944-02-16

    Abstract: 568,117. Making bearings. SIMMONDS AEROCESSORIES, Inc. Feb. 16, 1944, No. 2887. Convention date, Jan. 2, 1943. [Classes 83 (ii) and 83 (iv)] [Also in Group XXXIV] Forging.-In a self-aligning bearing wherein the shaft is received within a spherical member 10 housed in an annular member 11, the members 10, 11 have contact along a medial plane and the lateral parts of member 11 have means to engage the member 10 and confine it. In one form, Fig. 1, member 11 has a web 18 to engage member 10 and after the member 10 has been inserted, the lateral spaces are filled with part 20 by pouring in babhit metal, the web 18 taking up most of the pull-and-thrust load. In a modification, Fig. 2, member 11a has annular flaps or flanges 20a which are forced into contact with member 10a by dies 21, 22, wedge-shaped members being then forced or filled into the V-shaped groove behind the flanges 20a. Member 11a may have a small hole 25 to receive a lubricant wick 26.

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