US1375269A - Apparatus for the electrical long-distance control of the valve-gear of a hydraulic gun-pointing gear - Google Patents

Description

w. AKEMANN. APPARATUS FOR THE ELECTRICAL LONG DISTANCE CONTROL OF THE VALVE GEAR OF A HYDRAULIC GUN POINTIN'G GEAR.

APPLICATION FILED sums. 1920.

1,375,269. Patented m. 19, 1921.

2 SHEETSSHEET T.

W. AKEMANN. APPARATUS FOR THE ELECTRICAL LONG DISTANCE CONTROL OF THE VALVE GEAR OF A HYDRAULIC GUN POINTING GEAR. APPLICA'IION FILED SEPT. 3. I920.

1,375,269. Patented Apr. 19, 1921.

' 2 SHEETS-SHEET 2.

W Fig '2 6 I /l I f 4, wgw F l m A Z m f f III 10.: v l-4- X 1p L l WALTHER AKEMANN, OF ESSEN GERMANY, ASSIGNOR '10 FRIED. KR'U'PP ,AKTIEN- GESELIISCHAFT, OF ESSEN-DN-THE-RUHR, GERMANY.

Arrnnnrhs ron'. THE ELECTRICAL none-ms'rmcn CONTROL or run VALVE-GEAR or A. HYDRAULIC Gumrom'rme GEAR.

Specification of Ilettersfatent.

Application filed September-.3, 1920; Serial No. 408,070.

To all whom it mm'yconccm:

Be it known that I, WALTHER AKEMANrI, residing atEssen, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in Apparatus for the Electrical Lon -Distance Control of the Valve-Gear of a fiydraulic Gun-Pointing Gear, of which the following is a specification. 1

This invention relates to such an arrangement for the electrical long distance control of the valve gear of a hydraulic gun pointing gear, which enables a. particularly-accurate adjustment of the gun barrel to be obtained. A somewhat similar structure is described and. illustrated in my co-pending- 'erenc to the accompanying drawings which show an arrangement for the electrical long distance-control of the .valve gear of a hyraulic gun elevating gear.

Figure 1 is a diagrammatic view, partially in section of the inventiomj;

F1 2 is a horizontal sectiomgthnough a detai part on'a larger scale, ldoking from below and Fig. 3 is a section on the line 3-3 of Fig. 2, looking; in the direction of the arrow as.

is mounted by meansof its trunnions a in a cradle A In order that the elevation can be imparted to the barrel A it is pivactin hydraulic cylinder A which cylinder is pivotally mounted at a and is connected'by pipes a and a with electrically-controlled cut-off devices B and O which are constructed in the form of valves. It 1s also connected by pipes 01 and 2 which branch oiffrom the pipes a and a,

to a controll'ng valve D adapted to be 01:)-

elfated by hand and which is provided with pipe at for water under pressure and a pipe 01 for exhausting the water and also with a hand wheel d with which to operate-it.

Valyes b and c of the cut-off devices Q 'zalre held in 'their closed positions by these springs by" means of magnet cores 6 excitable windings b? and 0*. Pipes 6 and transmitter shaft h.

B and;

0 connect the cut-ofi' devic'es B and G with the-casing of, a .controllin valve adapted for long distance control which is provided with a pipe 6 for admitting water under pressure and a pipe 6 for exhausting the water.

The movable part of the controlling valve E consists of a piston rod c provided with three controlling pistons 6 e and e rigidly mounted thereon and the free end of which terminates in a rack e Into the rack 6 gears a toothed sector P, which forms part of a earing, which is contained inacasing F an is shown in Figs. 2 and 3 and which will be more fully described hereinafter. The said gearing is for-the' purpose of rendering the movements of'the piston rod 6 of the controlling-- valve E on the one hand dependent on the receiver motor G of an electrical long distance controlling apparatus and on the other hand dependent on th gun barrel A.'- v

The long distance controlling apparatus has a transmitter H (see Fig. 1) WhIChjS set up 'at the observing station and which is constructed in the well known way so that the continuous current supplied to it through 'conduc'tors it is transformed into three dephased currents of variable strength.

A denotes the-barrel of a navalgun which These'three dephased currents of variable strength are supplied by a three-phase long distance conductor J to the receiver-G, which is constructed as a synchronous motor and receives its continuous current excitation from a local main K. The armature of the transmitter H is rotated by a milled head it? and a hand wheel h which are positively connected to the middle wheels h and h" respectively of a sun and planet gear in the manner illustrated in Fig. 1 of the accompanying drawings. The planet wheel 72, of the gear is mounted on a bent arm on the This rotation of the armature of the transmitter H is transmitted through the conductor J to the armature of edto be rotated by the milled head 72?, is spr ngs-lbflandjc and can be drawn into 1311611 open posit ons against the pressure of provided with a reading off apparatus if it which indicates the adjusted range of the target and is used when the transmitter H is to have a rotation imparted to it which corresponds to the ran e of the target. The

adjust ng apparatus w ich is adapted to be the receiver motor G and to the gun barrel whcn this latter assumes ,its central A and which is substantially inclosed in the casing F is shown in Figs. 2 and 3- The" said gearing consists of two worm gears f f and f f mounted in bearings in the casing F and of which one f f is positively connected through a gearing f f to the shaft g? of the receiver (see also Fig.' 1) and the other through a gearing 'f f a a? a a a to the elevating sector a of the gun barrel. The-two worm gears are con nectedby a sun and planet gear 1'' f f with an apparatus, which regulates the stroke of the piston rod 6. of the controlling valve E and which willhereinafter be termed the stroke apparatus.

This stroke apparatus contains a drum f carried in bearings and adapted'to also rotate with its shaft 7 in the casing, the axis. of rotation of which drum coincides with the common axis of rotation of the worm wheels f and f and the drum is provided on its outer surface with a rib f which runs helically. This rib f being of greater external diameter over the part, which. extends over the top halfof the length of the drum than that which extends over the other 'half. The transition from one diameter to the other takes place at a part of the rib marked 7" in Fig. 3 and extends over only comparatively short part of the rib f Against the rib f bears a roller P which laterally embraces the rib and which is movably mounted on a bolt 7" running parallel with'the axis of rotation of the drum f. This bolt 7" is fixed on a forked lever arm f of a double armed lever which is mounted to oscillate on the casing F about an axis, which islikewise parallel with the axis of rotation of the drum 7 and the other lever arm 7 of which cafrrieson that part of it which projects from the casing the already mentioned toothed sector (P) 'which engages with the rack f ofthe piston rod 6. The lever arm 7 is acted on by a tension spring a rubbing brush is of one of the forked which is constructed as attached to an extension arms of the lever 7" f a flexible conductor f to a terminal f. The twofixed circuit closing pieces 7* and 7 are arranged .in-the distance from the circuit-closing piece 7 position tl1at' contact between the movable and one of the fixed circuit closing devices can only .take place when the lever f f has rotated through an angle in which the valve rod (4 has passed over a distance corresponding to the'covering of the valve.

The terminal f is connected by a conductor 71: (see Fig. net windings b and a and a conductor is with one pole of a bipolar switch K the other pole of which is connected across'a conductor'lc which branches off into two conductors 70 and 70 with the two fixed circuit closing pieces f and 7 The switch K is for the purpose of establishing connection between the magnet windings I) and If of the cut ofi devices and the local main K, and is for this purpose connected to the vmain K by conductors 70 and 7c".

The switch K is connected by an automatically acting locking device (not-shown) with the hand wheel d of the hand oper ated controlling valve D in such a way that the hand .wheel d can only be moved when the switch K is opened. Such automatic locking devices are very common'in the art,

vso that the particular construction of the locking device employed in the present invention need not therefore be more fully,v

described.

In the consideration of the working of the above described arrangement the description thereof will be commenced from the assumption that the gun barrel A has casing F at such a.

1 also) to the parallel magand is connected by Y already had an elevation imparted to it I which corresponds to a fixed range adjusted on the transmitter H and that the controlling valve is in its central position and the switch K is in the closed position. Furthermore let it be assumed-- that the ship takes up a horizontal floating position.

If nowthe barrel A is to be first brought for the purpose of loading the gun into the horizontal position and afterward into the 1 7 attached to the casing and which tends I .the roller the rib f.

to rotate the lever f ff in such a way that f bears with pressure against previous position. again, the switch K is brought into the opened position shown in Fig. 1. This causes the circuits leading to the cut off devices B and C to be broken and the cut of? devices B and C therefore assume under the action of the springs 12 and 0 their closed positions shown in Fig.-.

1.- The hand wheel d of the controlling valve 1) is now rotated in such a direction that the controlling valve D Opens in the desired direction, that is to say, that water under pressure can pass through the pipes dt, d anda into the cylinder A", In con the pipe d which carries it away. By means of a return apparatus such as a spring (not Now I rel A shown) the controlling valve D is at the same time returned to its central position, as soon as the gun barrel A has reached the horizontal position.

During the above described movement of thegun barrel A out of the firing position into the loading position the controlling valve E has also passed into a position which deviates from its middle position.

as during the movement of the bar- I the toothed sector a has also been moved the shaft f positively connected to the toothed sector a by the gearing f", a, a a", a and a, has set the. gearing f", f (see Fig. 2) contained in the casing in motion and thereby eifected a displacement of the planet wheel f and the drum f onnected therewith. On the rotation of H the 'm'. f, which takes place in the opposite direction to that indicated by'the arrow 3 (see Fi .3) the roller 7 ismoved on its bolt f axla-lly downward by the action of the rib f and passes out of the position shown in Fig. 3 in which it is pressed against the transition from its smaller to its larger diameter denoted by f (see Fig. 3) intoa new position, in which it bears against the part of the rib 1'' which is of the smaller diameter. The double-armed lever f, 7f is. accordingly rotated about its pivot point and passes into a position in which its circuit-closing iece f touches the fixed circuit-closing The rotation of the lever f f causes inits turn through j the medium of the rack gear 7 e- 'ay'move ment of the rod 6 downward, so that the controlling valve E (see Fig. 1) passes into one of. its open positions in which the pipe e rleading from the pressure reservoir communicates with the pipe 6 The movement of the controlling valve E into its open position does notyet however exert any influences on the gun barrel A, because the circuits for opening the cutoff devices B and C are still broken by the opened switch K and the cut-off devices B 'and Cf are; in their closedpositions in which, even when the controlling valve E is open, no-fluid under pressure can pass I through to the cylinder A closin If now after the gun barrel which is in the horizontal position has been loaded, the

witch K? be closed, then, as when the lever f f is in the position stated, the circuit pieces f and f touch the ci i'cuit K 26 10k 16 f b and a k K k K are closed and the mageach other,

net coils b3 and 0 become supplied with the pipe 6 and thence through the opened cut-ofl device B and through the pipe a into the cylinder A whereat the piston a begins to rise and rotates the gun barrel A in the direction ofv the elevation of its muzz'le, whileat the same time the water under pressure displaced in the cylinder A by the piston a flows through the pipe at", through the opened cut-ofi' device C, the pipe 0 and.

the controlling valve E to the pipe e which carriesit away.

The above mentioned rotation of the gun barrel A results in a rotation of the shaft 7 and together with it of the drum f through the medium of the gearing a a a a d a f f f f f f. in a direction of rotation which corresponds to the direction 01 rotation of the arrow 3 (see Fig. 3). The roller 7 accordingly again approaches the rib f on the drum noted by f (see Fig. 3) and, as soon as it has again passed out of the position shown .in Fig. 3 rotates the lever f 7" into its central position (likewise shown in Fig. 3) and in, which the contact between the circuitclos'ing piece f and 7, which still just exists is broken or interrupted and the piston rod of the controlling valve E is returned to its central'position .as shown in Fig. 1. The magnet coils 6* and c are at this time devoid of current, and the cut-off devices B and C very rapidlyassume their .closed position under the action of the corresponding springs b ando The admissionof waterunder pressure into. the cylin der A above mentioned therefore stops as both the controlling valve E and also the cut-off devices B-"and Care closed, and the f with the transition are de-' gun barrel A therefore remains stationary.

justment, then the graduated drum h" first rotates until the desired range value is.op'-' posite the mark h. With the drum h however rotates also the armature of the transmitte'r Hpositively connected thereto, and

the. armature of. the receiver G, which is connected by the long distance transmission conductor J, assumes also the corresponding which is of smaller diameter and by position. By this means the shaft 9' and with it the drum f of the stroke appara- -tus are set in rotation through the medium of the gearing f f '7 fif 'f f f. The drum i is again able to rotate in the direction'of thearrowy, (see Fig. 3);

.Under the action of the spring f the;

, roller 7, which hitherto was in contact with the'transition arc of the rib f denoted by f, slides down over the part of the rib which means the lever arm flipasses Into sure from the pipe 6 into the pipe 6 At this moment the circuit-closing pieces 7 and f come into contact with each other, and the circuits which contain the magnet windings?) and 0* are closed. The 'cut-ofi such a position that the circuit-closing piece f mounted thereon approaches the fixed circuit-closing piece :f, while the lever arm f and the toothed sector f mounted on its lower endca-use a'movement of the rack 6 and. consequently of the piston rod 6 of the controlling valve E in the direction in which'the controlling valvev c begins to per-. mit the admission of thewater under presdevices B and C are therefore raisedout of the closed position, into the open position.

The water under pressure passes out of the pipe 6 through the controlling valve 13 into'the pipe b and from thislatter through the opened cut-oil device B into the pipe at and so into the cylinder A The piston a consequently rises and imparts an 35 i water under pressure displaced by the piston a flows-away in the manner hereinbeelevation movement to the gun barrel. The

fore described. The, roller f of the stroke apparatus has simultaneously passed completely onto the lower portion of the rib f of the drum f and consequently the lever f 'f and the piston rod e have moved into their extreme position.

Owing to the rise of the front part A of the gun barrel its rear portion descends with the toothed sector a, which rotation of the toothed sector 0; causes the drum f to be rotated'in the opposite direction to that indicated by the arrow y through the medium of the gearing which has already been mentioned several times. The drum f is at the same time returned to the position in which it was situated prior to the commencement of its rotation by-the motor shaft g and in which the roller f assumes the position on the transition are of the rib f denoted by f which is shown in Fig. 3. The lever f f consequently also passes back again into its central position, in which position the contact of the circuit-closing pieces i and f is interrupted. The magnet coils b and c are thereby rendered devoid of.

current, so that under the action of the springs b and c the cut-off devices B and C are quickly closed. With the lever f f,

the piston rod c tOgether with the controlling valve E moves back into the central position, in which the valve port which ad-' joins the pipe 6 .is completely shut ofl. This concludes the controlling operation.

It is obvious with further explanation v that thcoperation, described must take place in exactly the samewa'y'when not'a raising but a lowering movement of the front part of the'gun barrel A is intended. For this purpose it is only necessary to rotate the transmitter shaft h. and consequently the armature shaftg 'of'the' receiver G in the reverse direction to that in which it waspreviously rotated. This causes the dire'c tion of movementcf'the otherparts con cerned to be likewise reversed, and the cir cuitmlosing piece f isbrought into contact with the circuit-closing f instead of f.

In consequence hereof the ascending piston rod e ofthe controlling valveE establishes a connection for the water pressure between the pipes 6 c and a so that the piston a has to descend in the cylinder A 1 The re-f turn of the controlling valve takes place at thesame time through .the medium of the toothed sector a and the stroke apparatus connected thereto in a manner which correspends exactly to, that, inwhich the operation previously took place, hut in'the reverse direction of rotation. J It 'is' also obvious without further explanation that the gun barrelA need not be at rest, when the transmitter H and conse quently the receiver G 'i'sadjustedr, r

- No elaborate explanation is needed either as to how the arrangement described worksif the assumption that the ship neither rolls nor pitches be allowed to drop. In this case it is only necessary by suitably turning the hand wheelh to pointthe telescope f horiz'ontally and thus impart to the transmitter H an additional rotation that corresponds to the angle of rolling or pitching of the 'ship. The gun barrel A must under all circumstances makethat movement after the closing of the switch K which corresponds tion with the piston rod e instead of with the lever arni f By suitably arranging the cut-ofi devlces B and C the working of these parts mlght

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