US1563416A - Variable condenser - Google Patents

Description

Dec. 1 1925 H. M. WOLFSON VARIABLE CONDENSER Filed June 19. 1922 2 Sheets-Sheet 1 Dec. 1, 1925. 1,563,416

H. M. WOLFSON VARIABLE CONDENSER I Filed June 19. 1922 2 Sheets-Sheet 2 Patented Dec. 1, 1925;.

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HENRY M. WOLFSON, OF NEW YORK, N. Y.

VARIABLE CONDENSER.

' Application filed June 19, 1922. Serial No. 569,272.

T 0 all whom it may concern Be it known that I, Hnnnr M. WOLFSON, a citizen of the United States, residing at 488 East 140th Street, New York, in the county of Bronx and State of New York,

have invented certain new and useful Ime provements in Variable Condensers, of which the following is a specification.

My invention relates to a new and improved form ofvariable. condenser.

, One of the objects of my invention is to provide a variable condenser of a simple and strong construction, which can be readily manufactured and assembled.

Another object of my invention is to provide avariable condenser which although of simple construction can be delicately regulate Another object of-my invention is to provide a variable condenser especially adapted for use in radio receiving circuits.

Other objects of my invention will be set forth in the following description and drawings which illustrate a preferred embodiment thereof.

Fig. 1 is a side elevation partially in section.

Fig. 2 is a section on the line 22 of Fig. 1.

Fig. 3 is a section on the line 3--3 of Fig. 1.

Fig. i is a bottom perspective view of the stator.

Fig. 5 is a perspective view of the rotor. Fig. 6 is a perspective view of one of the rotor plates, and Fig. 7 of a stator plate.

in devices heretofore used it has been customar to have a stationary part which may be cal ed the stator having a series of separated plates hetween which plates mounted upon a movable shaft, and forming what may be called a rotor could be causedto enter to a reater or less extent. However, the regulation that could be accomplished by revolving the shaft of the rotor was clearly not suficient for fine tuning and it was necessary to provide reducing gears or the-like in order to be able to revolve the shaft of the rotor to only a slight extent. This, of course, added considerably to the complication and cost of manufacture of the article. According to my invention the stator and rotor plates are respectively arranged in what may be called a helical arrangement so that the plates of the rotor enter one by one between the lates of the stator and a very delicate regu ation can be secured.

As clearly shown in Figs. 1 and 3, a plate 1 which can be made of any suitable insulating material has four posts It secured thereto by means of the nuts 12. As clearly shown in the left hand side of Fig. 1, each said post has a shank of reduced width which can pass through a hole of corresponding size in the plate 1 and this shank can be engaged by the nut 12. The stator plates t have the form shown in Fig. 7 and have a shape substantially like a quadrant of a disc having an inner arcuate end. These stator plates 4 have orifices 5. As clearly shown in Figs. 3 and 7, the holes 5 are of such size that each late 4 can he slipped upon two of the sai rods R with its arcuate inner end adjacent the central part of the device.

Sleeve- like spacing members 2, 2, 3. and 3 are provided for holding the said stator plates 4: and in properly spaced position and the stator plates and said sleeve members are tightly pressed together by means of the nutsti which cooperate with the threaded bottoms of the posts B). By reason or this construction the parts can be readily manufactured and quickly and ethciently assembled.

- The rotor consists of an externally threaded shaft 9 having index disc 14 and a knurled head 15 secured thereto. As clearly shown in Fig. 6 each rotor plate 1'? has an orifice 18, a downward tongue 19 and a recess 20. It is also clear that each rotor plate 17 also has the general shape of a uadrant of a disc. The consecutive plates 1 of the rotor occupy consecutive quadrants as shown in Fig. 5 with the tongue 19 ot. each upper late 17 fitting into the recess 20 of the adjacent lower plate. This is also clearly shown in Fig. 2.

The orifice 1d of each rotor plate 17 is of sufficient diameter to enable the said plate to be slipped over the bolt like extension 9' of the shalt 9. As can be clearly seen in Figs. 2 and 5 a series or" sleeves 21 serve-to keep the respective rotor plates 17 in proper vertical relationship and the sleeve 21 and rotor plates 1? are firmly clamped into position by means of the nut 22 located at the threaded bottom of the extension 9. Hencethe completel assembled rotor has its plates 17 firmy 100 ed against'all vertical movement and against all transverse movement. Before the indicator or index disc 14 and the head 15 are secured to the shaft 9, the top of the said shaft can be passed above the top stator plate 4 and through the central. opening in the disc 1. This central opening is threaded and an external bushing 7 can be secured in the said opening and this can be firmly held in osition by means of the nut 8. The outer bus ing 7 has its central opening threaded so that an, externally threaded inner bushing 10 can be adjustably secured in osition. The opening of the said inner bus ing 10 is also threaded so that it can cooperate with the external thread of the shaft 9. By revolving the inner bushing 10 so that it moves up and down in the outer bushin 7 the shaft 9'may be vertically adjusted without revolving it. This is to insure the proper relative posltion of the topmost rotor plate 17 with respect to. the bottom stator plate 4 ,so that'the rotor plates can move-between the stator lates and also upwardly so that the rotor p ates and the stator plates have a relation similar to the cooperating threading of a nut and the bolt.

The inner bushing 10 has an upper part without any threading and of a reduced diameter and this can be engaged by means of the set screw 11 so as to firmly lock the inner bushing 10 without injuring any part of the threading thereof.

When the parts are thus assembled, the

- index disc- 14 and the .knurled head 15 can metho be secured to the shaft 9 by any suitable of the stator plates. It is obvious that as the shaft 9 is further revolved that more of the rotor plates 17 pass between the stator plates 4, so that the capacity .of the condenser is very delicately and graduall increased by a. relatively large revolution of the shaft 9.

A suitable index 16 is preferably secured to the late 1 so that it cooperates with the index 14 to indicate the capacity of the condenser.

I have shown a preferred embodiment of my im roved condenser and of myimproved for bringing the rotor plates and stator plates into the operative position but it is obvious that numerous omissions and changes could be made without departing from the spirit of my invention.

Wherever the parts are referred to either in the description or in the claims by numeradjacent plate, each sai movement about the vertical axis if the con-' denser is so held that its axis is vertical.

Of course, the operation'of my condenser is the same, no matter how the axis thereof is held.

It is obvious that if desired, the series of plates of the stator could be joined to form a continuous helical windin similar to the internal thread of a nut. orrespondingly, the series of plates of the rotor could be joined to form a similar helical winding, like the threading of a bolt. Such strnctures are obvious equivalents for the one illustrated in the embodiment before described. -Such parts could be cheaply made by a single casting.

' The series of stator plates are equivalent to and may be referred to as stator plate means, and'the series of rotor'plates may be similarly referred to as rotor plate means. I believe that I am thefirst to provide a condenser'whereby the capacity is varied by a simultaneous vertical and horizontal movement of the rotor plate means with respect to the stator plate means.

I claim:

1. A condenser having a plurality of helically arranged and stationary plates and a plurality of movable plates arranged in like helical arrangement, and means for rotating; and vertically moving said movable plates adapted to successively introduce them between said stationary plates.

2. A condenser having a series of substan tially quadrantal stationary plates which are' vertically spaced from each other and occupy successive quadrants, a series of quadrantal movable plates similarly arranged, and means for rotating and vertically moving said movable plates adapted to cause them to successively pass between said stationary plates- 3. In a condenser, a threaded shaft having an extension threaded at its bottom, a series of plates each having a recess and each having a tongue engagin the recess of the plate having an orifice whereby it can be mounted on said extension, spacing sleeves mounted on said extension between said plates which are mounted on said extension, and a nut adapted to clamp said plates and spacing members together.

4.'A condenser having a stationary part provided with stator plate means, a revoluble shaft having rotor plate means mounted thereon and spaced from said stator plate varied, the said revoluble shaft having a means, and means adapted to cause such sifree longitudinal movement with res ect to 10 multaneous revolutioniof said shaft and such said stationary part which exceeds tie dislongitudinal movement thereon, that said tance between said stator plate means and 5 rotor plate means and said stator pla'te sald ro qr' plate meansv means remain spaced from each othefand III lmony whereof 'h r n o X my the length of said rotor plate means inteig 5 -p0sedfbetween said stator plate means is e HENRY M. VVOLFSON.

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