US1650555A

US1650555A - Electrical controlling means for organs

Info

Publication number: US1650555A
Application number: US688482A
Authority: US
Inventors: Walcker Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-01-23
Filing date: 1924-01-25
Publication date: 1927-11-22
Anticipated expiration: 1944-11-22

Description

I 1,650,555 P. WALCKER ELECTRICAL CONTROLLING MEANS FOR ORGANS Filed Jan. 25. 1924 2 Sheets-Sheet l 6Fig.2.

Pam? ZhZcke-r 77% J Nov. 22, 192 7.

P. WALCKER ELEC'ERICAL CONTROLLING MEANS FOR ORGANS Filed Jan- 25. 1924 2 Sheets-Sheet 2 Z51" PauZ MZCXIGY JAM IV- I .14...

PAUL VJ'ALGKEE, E FEANHFORTO1 lTHE-QDEE. GERMANY.

ELECTRICAL CONTROLLING 'lIIEANFJ FOE QBGAIJS.

Application filed January 25, 1.9%, Serial No. 888382.,

This invention relates to electric organ controllers. A feature of the invention resides in the fact that instead of magnets of the type ordinarily used solenoids are employed which are arrarged in such a manner as to enable them to be operated or energized by alternating currents. The motion of the solenoid core is utilized :lor the operation of contacts and for moving various organ control members such as valves, couplers and combinations.

By employing solenoids which draw in a core for operating contacts and moving members of valves. couplers and combinations in the organ, the particular advantage is obtained that the energizing current is enabled to cause an operating member to execute a comparatively large travel. This large travel renders it possible to employ in a novel manner rubbing; contacts made of cheap metal. urthermore it is possible by utilizingtwo solenoids in the register control mechanism for instance to set a member at will into any one of several positions. Another advantage of the solenoid is that it enables a valre to be produced which can be indirectly ondirectly controlled with the aid of alternating current. It also enables control mechanism to'be produced for indircctly operated valves particularly for large va ves of air. The solenoids can be provided in accordance with the invention with an anti-sparking; resistance which may be wound. in the form of a non-inductive coil on the solenoid.

The invention is illustrated by way of example in the drawing in which Fig. 1. is a section of a tone-l ey controller.

2 is a section of Fig. 1 on the line Q-2.

3 is a top view of a detail from Fig. 1.

is a section ot a stop controller in which solenoids are en'iployed for setting various combinations.

Fig. 5 iso section of 5---5.

{L on the line and. in Germany Jonuary 23, 1923.

Fig. 9 shows a similar valve for compressed air chambers.

Fig. is a top View of solenoid accord-- ing to Figs. 8 and 9.

Fig. 1 shows the end 1 of a. key arranged to lift a

spring

2, 3 are tracker pins which are effected both by the top springs and the bottom springs 41,5 is a common return wire which is fixed to a

coupler shaft

6, 7 are contact springs with loops 7*, the short ends near the loops being fixed in a wall and the other ends resting on screw nuts 10 whose positions on the tracker pins are adjustable. The loops 7 in the contact springs 7 enable their free ends to be easily moved in all directions. 8 are solenoids whose cores 9 are attached to cords 9 or the like which over rolls or pulleys 9. The other ends of the cords are loaded by counter weights 9. The weight of a solenoid core is larger than that of its counter weight so that, as long as a solenoid is not energized, its core 9 rests upon a support 9. When a solenoid is energized its core 9 is lifted and the counterweight 9 turns the associated pulley 9 and therefore also the coupler shaft 6 upon which the common return wire 5 is mounted. l Vhen a coupler shatt 6 is set for a controlling operation as indicated by the lower shaft 6 in Figs. 1 and 2, the return wire 5 is in a position in which on the motion of the tracker pin 3 the contact spring! 7 adjacent to the set bowed return wire 5 rubs against the latter, the spring being; then deflected laterally by the bow that it rubs against. The distance between the springs T and a return wire 5 which is set for operation can be regulated by the insulated nuts ll).

be lateral pressure of the contact sprint against the return wire while rubbing against the latter ensures an intimate contact, the closure of the contact and opening: of the same taking); plave at dill ercut parts of the bow. By this arrangement it is possible to use cheap metal instead of precious metal for the contacts. Besides with con-- tracts of this type it is not absolutely necesto employ spark extinguishing devices.

Those contacts serve tor closing the circuits of electric tune relays, see tor example Fig. 9, while the circuits of the solenoids can closed like those of the i bl t -ll? relays.

Lgs. 4. and 6 tw s w oids ill- 11 are shown, the cores 12 of which exert a pull on a cord or rope 13. The cores balance each other and are adapted to rotate by means of the cord a drum or barrel 1% into different positions. 20 is a second drum or barrel similar to barrel l t. The two drums are connected by an endless chain or the like built of eprin coils, so to get a tirno contact with the drums, whereby the chain will travel to and fro ant. rotate druin 20 when the drum 14: is rotated by ener izing one of the solenoids ll" and ll". The endless chain consists of two parts 16 and 16" electrically insulated tron'i each other by means of insulating

members

15 and 15. Part 16 of the chain is electrically connect ed with the beginning of the winding oi the solenoid 11 (Fig. 6) while the other part 16 is ina similar connection with the beginning of the solenoid winding 11. The ends of the windings ot th two solenoids are joined and tonnccicd w. the cathode oi battery C. Arranged to rub against the conductors 16 and 16" are contacts 17 the rubbing surfaces of which are more narrow than the insulating

members

15 and 15. Each of these contacts 17 terms one pole'ot series of switches the counter poles of which are connected with the positive pole of the battery. On the drum 1a a series of contacts 18 are arranged side by side having difiierent length as shown in 5 and being connected with each other and with the ends of solenoid-windings as afterwards described. The contacts 18 are adapted to come into touch with contacts 19 (Fins. 4 and 6) on the rotation oi the drum M. These contacts 19 are connected to one pole Q9 oit a

contact

28, 29, the counter pole 28 being in electrical connection with the positive pole oil the battery C.

The drain 2O bears a contachhar 20 extending over the whole of its length and having an electrical connection with the contact pole 29 as indicated by the wire 20" Fig. 6, the ends of which may be secured to the bar 20 and the contact pole 29 re spectively. ll-24 are contact-poles each being under the action of a spring! and adapted to be brought. by means of a keyincniber 26 on the front of the stop-board out of the path of the contact bar 20 while in their normal position they are adapted to come into touch with the contact bar 2i when the drum 20 is rotated.

In the drawings two key members 26 which act on the

contacts

22 and 23 are shown. The number of these contacts is at will. The number of the contact poles 1'7 and switches 1?" correspond to the sum ot the contacts 18 on the drum 14 and that ot the movable contacts 21 E i. A separate null-contact still to be described is arranged. The contacts 2124rare connected by means of the wire 18 with. the above mentioned contacts 18. The contact pole 28 is arranged on a double acting lever 28" being: under the action of the core of a. solenoid 27 in such a manner that the lever will rotate under the inl'luence of its overweight at one side, when the solenoid 27 is energized and the core is lifted, so as to disconnect the contact from the contact part 29. 30" and 30" are solenoids. and 31" common core of these solenoids. This core penetrates a slot if) of a part 4-5 Pig); 1 which by means of a spring 1-32 is connected to the housing' of the stop controller so that by means of projections ll on the core 31 the sprint; restores this core to its normal or central position when the solenoids are not cneii'cgizaed. The width of the slot 4-5" corresponds to the diameter of the. core 31. its. length being such as to allow the part -15 to make an oscillation around the fixed point of the spring on the housing. A plurality (it such pairs of so enoids 30. 30" are arranged side by side corresponding to the number ot solenoids The core 31 ot each two solenoids 30", 30 provided with two pins 33 and 33 A left point 33" of the core is shown in touch with the contact-polc of a slidaliilc member 37. This contact-pole is connected with the beginning; of the winding of the solenoid 2% with which the contacts li -Q 1 are also connected. The ends oil? the windings of the solcnoi .s 50 and 30" are connected with the cathode of the battery. The licejiua ngg of the winding); ot the solenoid 30* is connected with a second contact 34- ot the slidable nien'iber 37 and with a fixed contact pole 46 which ttornis another counter pole for the above mentioned contact pole 23 when the solenoid 27 is en 'izcd. The core 31 ot the two solenoids is in electrical connection with a contact pole which is adapted to be pressed by means ot a lI( Y 3?) usually called chan ng l-:c v against a countcr pole 36 which is in electrical connection with the positii'e pole of the battery C. The

i pi'o'vi 'lcd w th a stopslidab c member f? key 38 arranged at the trout oi the stopcontrollcr housing and also adapted to more the slidable member 37. At its opposite end the slhilable member is provided with a contact pole 39, hcine; in electrical connection with the positive pole ot the battery (1 and adapted to enga n a contact spring); "Tll which through the winding; (it a stop solenoid 5? is in electrical cornicction with the cathode ot the battery (l 13 is a crcsccndw barrel which is adapted by nicans o't' projections arranged in stage crcd relation over the length of the barrel to act upon elastic hoolts lslo't slidabl' nicin ers t? arranged side by side so as when bcii turned to more the latter from the right to the lctt. Each of the slidahle nienihe s 42 of which a member may be provided which corresponds to the number of the members 32' orovided between the pipe air at one end with an indicating part which is adapted to step out of the front housing of the stop controller when the slidingmembers are moved from the right to the left, enabling the organ player to see which of the different slidable members 42 are moved by the crescendo roll 43. At the opposite end the slidable members 42 are provided with a contact pole 39 which is electrically connected with the positive pole of the battery. By movin the sliding' member by means of the cr scendo roll 43 the contact pole 39 comes into touch with the contact pole which is electrically connected with the negative pole of the battery through the windings of a stop solenoid 55. The number of solenoids preferably may be the same as the number of slidable parts 37.

73 is one of a. row of contact springs arranged side by side and movable by means of stop pulls 72. As shown in Fig. 6 the springs 73 are electrically connected with the .gative pole of the battery in a similar manner as the contact poles 2l- 24. The turnable bar 74 is at its upper end provided with a contact bar 74 or the like which is electrically connected with the positive pole of the battery and adapted by turning of the bar 74 to come into touch with the contact spring 73. 75 (Fig. 6) is a yielding contactpole which is arranged in the way of the contact-bar 74 and adapted to come transitorily into touch with the said contact bar. The contact pole 75 is connected to the be- Inning of the winding of the solenoid 30". As

many parts

72, 73, 7 5 preferably are provided as there are solenoids 55 in the organ.

In Fig. 8 55 is a solenoid whose core 56 carries a disk 5 and rests upon a double acting valve member 58. 59 is an opening channel and the external air. is an opening between the wind trunk 61 and the pipe air channel. The opening" 62 leads to an extension of the pipe channel. Vi hen the solenoid 55 is energized the core 56 is raised and communication is then established between the pipe or channel and the external air while the connection between the wind trunk 61 and the pipe air channel is closed due to the valve member being pressed upward by tl wind. As the valve member 58 is loose on the end of the solenoid core slight up and down movements of the latter do not effect the member 58. Such slight up and down movements of the core may arise when alternating" current is used for energizing the solenoid. The device in Fig". 8 thus represents a flow out relay.

In the arrangement according to Fig: 9 parts corresponding to those ofFig. 8 have similar reference numerals. In this figure the part 58 is a double acting valve between the opening 60 that connects the wind trunk 61 with the pipe air channel and the opening 59 that connects the pipe or channel with the exterior air. The double acting valve 56 is held by the solenoid core 56 in the position shown against the wind in the wind trunk. When the solenoid core is attracted the double acting valve is pushed up and closes the opening between the pipe air channel and the external air. in this modification the double acting valve is also independent of vibrations of the core 56. The arrangement shown in this figure is a pref-sure air valve which may be used for example to transfer the effect of the circuit closure of

parts

5, 7 in Figs. 1 and 2 to the wind chest. 59

The arrangements of Fins. 6 and 9 may be used either for controlling registers or tunes although in the former figure a register control is shown.

Figs. and 10 illustrate the simple manner in which a solenoid can. be inserted into its position in the circuit. This is accomplished by means of the contact springs 66 and 67. The latter connect-s the solenoid to the common return and the former connects a non-inductive resistance which is wound on the solenoid while the lead for the solenoid coil is connected by means of the

parts

68 and 69.

The device works as follows:

The stop solenoid 55 is able to be energized by a range of different means. Firstly the sliding member 37 is manually movable by means of the key member 88 to close tae contact 89, 40. The restoring in this case may also be worked by hand.

Secondly one of the above mentioned switches of the contact poles 17, f. e. as shown in Fig. 6 the third switch 17 from the left, may be closed. with the result, that the current flows from the battery over this contact polo 17. chain 16". solenoid winding ll. and solenoid-winding 2'? back to the battery. The solenoid ll" is energized and rotates the drum 14 until the insulating part 15 meets that contact part 17, whose switch 1? is closed. In this moment the insulating part 15 interrupts the current energizmg the solenoid 11*. At the same time with the closing of the switch 17 the solenoid 27 energized and disconnects the contact 26, 29 hereby closing the contact 28. 46, so that all solenoids 30. in the following called:

restorin solenoids are encr 'ized. his

b 1 no has the eflect tuat. owing to the IHOVHIQ of their respective sliding members 37 from .the left to the right,

allcontact poles

39 and 40 which possibly had. been brought into touch, are disconnected.

The rotation of the drum 16 has the result that the drum 20 also rotates until f. e. the contact bar 20 is adapted to touch the con tact pole 23, if this pole is set by means of its key 26. In the latter case the following circuit is closed: pole,

contact

28, 29,

wire contact bar 20. contact pole 23, winding of the solenoid pole of the battery C. The energizing ot the solenoid 30 etiects a movement of the core 31 from the right to the left and the core 31 takes with it by means of its point 33" touching the contact part St the slidable member 37. Hereby the contact part 39 comes into touch with the contact part 10 so as to close the circuit of the solenoid 55,

In the :ase that the fifth switch 17" From the leftwas set, the drum 20 had been I'otated to a point where its contact bar 20 may come into touch with the contact pole 21. Corresponding to each solenoid 553 one series of contact poles Ell--24 may be provided. the total of tl e contact poles E 1. 22, 23 and 2-1 respectively being arranged each in a horizontal row. Hereby the organ player is enabled at. his will to prepare a plurality of stop combinations by setting a certain number of contact poles in each said rows. By switching on the titth switch 17 from the left the stop-conibii'nition. which or merly had been prepared in the row ot the contact-poles 21. is thrown on. By switching the third switch 17 from the left, the stop combination, prepared in the row 0'? the Contact poles 23, will be thrown on. The organ player every moment is enabled to alter the different stop-combinations by add ing or subtracting stops.

The above mentioned disconnection of the

contact

28, 29 prevents that during the rotation of the drum 20, contacts 21-24: which possibly were set and therefore come intotonch with the contact bar 20, eit'ect the energizing of the respective setting solenoids.

Thirdly: In case the eighth switch 17 from the left is switched on. the like circuit as above mentioned, is closed and a rotation of the drums 20 and 14L takes place. The insulating member 15 now travels from the left to the right until it strikes the eighth contact 17 from the left. Now the contactbar 20 of the drum 20 is outside the reach of the contact poles'212 l while the contact springs 18 of the drum 14 come into touch with the contact poles 19. These contact poles being of ditl'ercntlength, (Fig. 5) a greater or smaller number of contact poles 18 will come into touch with the respective poles 19 according to the degree of the rotation of the drums. During this rotation the above mentioned disconnection of the circuit of the setting solenoids takes place by energizing the solenoid 27. After the drums are come to a stillstand owing to the meeting of the insulating member 15 with the contact pole 17 switched on, the circuits of the respective setting solenoids are closed as above described. The setting solenoids each of which is connected to one contact pole 18 efi'ect the moving of their sliding members 37 and. the switching on of the

con tacts

39, 10. This device may serve for the controlling of fixed or crescendo combinations. According to the position of the contact 17 switched on, more or less of stopcombinations are throw on.

Fourthly The stop solenoid may also be energized by turning the member 7-1. In its movement the contact part 7 1 always strikes against the fixed flexible contact 75. In this mo men t all restoring solenoids 30" are energized so that by means of the contact between the pole '7?) and 7 -1" every time before the setting solenoids are energized. stops. which are not \VllilllGd to sound, are thrown of during the movement of the member 7 1'. The same cilccl i. e. the throwing on of all restoring solenoids takes also place in the return movement oi the mcn'iber 74.

Fig. 7 illustrates more especially an arrangement similar to that represented by the part 72 7 t in Fig. 4:. In this modification the pull 72 can be set into different positionseo that the spring 73 also goes into different positions a, Z), 0. (Z. The pivoted lath 7-? is also arranged to be turned into (ii'lIClGllb positions, this being preferably accomplished by means of a device imilar to that shown in Fig. 4 for the rotation of the drums letand 20. The Contact springs 73 which have been pulled into position a corresponding to the tired combination pianissinio therefore first come into engagement with the contact bar 74: connected to the pivotal member 7 1. On further turning the bar the group of those contact springs 73 are added. which are pulled into position 7) and then the group of contact s 'iring-s pulled into position 0 and (Z respectively are added. The latter position (Z corresponds to the lined combination fortissimo. In this manner the fixed con'ibiuations from pianissin'io to tortissimo which. in them-'elves, may be changed in any de ired manner, can be switched on in succession by one and the une device.

The changing-hey 36 operates as follows: By energizing a setting solenoid 30 or moving a stop key 38 the respective slidable member 37 is moved from the right to the lclft and closes the contact 3. 4:0. Owing to this movement of the sliding incniber and owing to the tact, that the core 31 each time the energization of the solenoids 30 or 30 is interrupted. is restored to its central position by means of the spring The contact between the point 33 oi the core and the contact pole 34 of the sliding member is disconnected while the point 33 otthe core comes into touch with the contact pole 84" oi? the sliding member. By setting the changing key or the following 0'.) circuit i closed: pole, contact 36. 36, core 31, contact poles 33. 34", solenoid wind- Eng! 30* pole. This has the cit" i that is switched on, the null one or more restoring solenoids are energized and disconnect the contact 89, or" their respective stop solenoids 55. The chanp 1g key automatically rota es its normal position, when relezrcd, and disconnects the

contact

36, 36 as to open the above mentioned circuit. The core 31 is brought to its normal or central position by means the spring when the solenoids are no more energized, and its point 33 now strikes again on the contact pole 8st of the sliding member 87 which also has been brought into its norn al position. ff hen the changing key now is switched on, the circuits of the respective setting solenoids 30 are closed and there ith the respective stop solenoids may be energized, the arrangenient being such that the particular solenoid which was not last energized will have its circuit prepared for completion The restoring of the contacts switched on and of the parts, which effect this switching, may be performed e. in such a way that simultaneously with the restoring of the sliding members 87', which had been moved by energizing their setting solenoids, I the sliding members lQmoved by the crescendo barrel" l3 are brought back into a position where the contact poles 39 and l0 are out of touch. It may be desirable to pro vide means for simultaneously and quickly switching oil all

contacts

39, 20 and 39 4:0. lhese means may be pivoted lathes or barrels or the like devices.

Each time when one ot the switches 1'7 which corresponds to a contact pole 17, is switched off after having been switched on to effect a rotation of the drums 3A and 20, a null contact, f. e. the first contact 17 and switch 17 from the left in Fig. 6 automatically may be switched on. This has the effect that the tollowing circuit is closed: pole, null contact, chain 16", solenoid 11 solenoid 2?, pole. "I he energization of the solenoid 11 hereby effected has the result that the drums 1e and 20 are rotated in a contrary direction until the insulating member 15 strikes upon the null contact pole 17 and opens the said circuit. ll ow, when a switch contact automatically may be switched oil.

I claim 1. In a controlling device for controlling a valve oi? a wind-chest off an organ, an elec trically controlled member, means for keeping the said member in a first position, a solenoid for bringing the member from the said first position into a second position, and other means for preventing the energized solenoid from acting on the said member while the'latter in second position.

in a'controlling device for controlling a valve of a wind-chest of an organ, an electrio-ally controlled member. two operating means adapted to operate the said member,

a solenoid for counteractinga said operating means, and other means for temporarily making the said member independent of the influence of the said operating means counteracted by the said solenoid.

3. ln a controlling device for controlling a valve of a wind-ch st of an organ, an electri ally controlled member, two operating means adapted to operate the said member, a solenoid core adapted to serve one of the said operating means, a solenoid for drawing in the said core, and other means for making the said member independent of the influence or" the core when it is drawn in by the solenoid.

l. In a controlling device for controlling a valve of a wind-chest of an organ, an electrically controlled member, two solenoids each with a core, the cores being adapted to move the said member in opposite directions, and means for alternatively exciting the said solenoids.

5. In a controlling device for controlling a valve of wind-chest of an organ, an electrically controlled member, two solenoids each with a core, the cores being adapted to move the said member in opposite directions, means for alternatively exciting the said solenoids, and other selective means for in; tcrrnpting the movement of the cores in ditierent predetermined positions.

6. in a controlling device for controlling a valve of a wind-chest of an organ, an elec-- trically controlled member, a single solenoid core adapted to operate the said member in opposite directions, two means for keeping the said core in a position ot rest, and two solenoids each adapted to act on the said core against said means,

7. lln a controllin device for controlling a valve of a wind-chest of an organ, an electrically controlled member, a spring, a single solenoid core adapted to operate the said member in opposite directions, the said core being kept in its position of rest by gravity anda spring, and two solenoids adapted to act on the said core against gravity or the said spring respectivel 8. In a controlling device for controlling a valve of a wind-chest of an organ, an electrically controlled member, a single solenoid core adapted to operate the said meinher in opposite directions, two means for keeping the said core in a position or". rest, two solenoids each adapted to act on the said core against a said means, circuits for eciting the saidsolenoids, and a circuit closer in the circuit of each of the solenoids, a contact part of each of the said closers being movable together with the core, the other contact part of the said closers being adapted to be moved by means or the core, where by the circuit closers are alternately adapted to close preparatorily the r rcait ot that solenoid which was not last excited.

9. In a controlling device for controlling a valve of a wind-chest of an organ, an electrically controlled member, a single solenoid core adapted to control the said member in opposite directions, a single means for keeping the said core in a position of rest, two solenoids each adapted to act on the said core against a said means, circuits for exciting thesaid solenoids, and a circuit closer in the circuit of each of the solenoids, a contact part of each of the said closers being movable together with the core, the other contact part of the said closers being adapted to be moved by means of the core, where by the circuit closers are alternately adapted to close preparatorily the circuit of that solenoid which was not last excited.

10. In a controlling device for controlling a valve of a wind-chest of an organ, an electrically controlled member, a single solenoid core adapted to control the said mem her in opposite directions, means for keeping the said core in a position of rest, two solenoids each adapted to act on the said core against a said means, circuits for exciting the said solenoids, and a circuit closer in the circuit of each of the solenoids, a contact part of each of the said closers being movable together with the core, the other contact part of the said closers being adapted to be moved by means of the core, whereby the circuit closers are alternately adapted to close preparatorily the circuit of that solenoid which was not last excited.

11. In a controlling device for controlling a valve of a wind-chest of an organ, a turnable member, means adapted to turn the said member in one direction of turning, a solenoid core in combination with a solenoid, adapted to turn the said member in the other direction of turning, and other means for preventing the solenoid core from acting on the said member when the solenoid is ex cited.

12. In a controlling device for controlling a valve of a wind-chest of an organ, a turnable member, two solenoid cores adapted to turn the said member in ditlerent directions and to balance each other, two solenoids for moving the said cores, circuits adapted to excite one of the said solenoids at time in the circuit of each said solenoids, a first eon-tact part, adapted to be moved by means of the said turnable member, a plurality of second contact parts each adapted to rub on the said first contact parts and singly to be thrown into ,a said circuit, and an insulating means between the said two first contact parts adapted to separate therefrom a said second thrown in contact part.

13. In a controlling device for controlling a valve ol a wind-chest of an organ two turnable members, two solenoid cores adapted to turn said member and to balance each other, two solenoids for moving the said cores, circuits adapted to excite one of the said solenoids at time, in a circuit of each of the said solenoids a first contact part, these contact parts being electrically isolated from each other and both adapted to be moved by means of a said turn-able member, and a plurality of second contact pai.'ts,each adapted to rub on the said first movable contact parts and singly to be thrown into a said circuit, whereby the isolating position between the said first contact parts having a width exceeding the breadth of the said second contact parts.

14. In a device according to claim 1 the said member bein a turnable carrier of a bowed contact of a circuit closer the other contact part of which being a shiftable part that is adapted to make contact when the said carrier is turned and itself is shifted.

15. In a device according to claim 1 the said member being a turnable carrier of a common return of a plurality of individually shiftable circuit closers.

16. In a device according to claim 1, the said member being a closing member adapted to close an opening in the said windchest and being in such connection with the core of the said solenoid that the gravity of the core of the not energized solenoid keeps the closing member against the wind pres sure of the wind chest in its closing position.

17. In a device ttCCOl'CliIlg to claim 1, a plurality of members, a firstsaid member being a first closing member adapted to close a first opening in the said wind chest and being in such connection with the core of the said solenoid that the gravity of the core of the not energized solenoid keeps the said closing member in its closing position against the wind pressure oi thewind chest, and a second said member being also a closing member adapted to close a second opening oi the said wlnd chest this second closmg member bein held under the action of the gravity of the same not energized core in its opening position and adapted to close the said second opening solely under the action of the wind of the wind chest when the solenoid is energized.

18. In a device according to claim 1, the said. member being a closing member adapted to close alternately two openings in the said wind chest and being in such connection with the core of the said solenoid that the gravity of the core of the not energized solenoid keeps the closingmember against thewind pressure oi. the wind chest in its closing position for one of the said openings the said member being in a loose guid ing connection with the said core and adapted to close the second opening under the action of the wind oi the wind chest.

19. In a device according to claim 1, a

plurality of members, a first said member lUU ing member being held under the action of the gravity the same not energized core in its opening position and adapted to close the second opening solely under the action of the Wind of the Wind chest when the solenoid is energized While it is in a. loose guiding connection with the said core.

In testimony Whei'eol. I have affixed my signature.

PAUL WAlLCKER.