US1630903A - Inductance-coil attachment - Google Patents

Description

' May 31, 1927g 1,630,903

H. B. PEARSON INDUCTANCE COIL ATTACHMENT H. B. PEARSQN INDUCTANCE COIL ATTACHMENT May 31, 1927. 1,630,903

Filed Jan. 28. 1922 5 Sheets-Sheet 2 1,630,903 May 3l, l927- H, B, PEARSON l INDUCTANCE COIL ATTACHMENT Filed Jan. 28. 1922 5 Sheets-Sheet 3 L n f ATTORNEYS. myn? Patented May 31, 1927.

UNITED STATES PATENT OFFICE.

HERBERT BROV/'N PEARSON, OF BROOKLYN, NEW YORK, ASSGNOR TO SHIP OWNERS RADIO SERVICE, ING., OF NEW YORK, N. Y., CORPORATION OF WASHING-TON.

INDUCTANCE-COIL ATTACHMENT.

Application filed January 28, 1922. Serial No. 532,476.

This invention relates to an inductance coil attachment for use in connection with any electrical circuit in which' inductance coils are employed, but which is especially adapted for use in connection with a wireless receiving or transmitting system.

The object of the invention is to provide an attachment of this nature which is exceedingly simple in construction, efficient in `operation and economical of manufacture.

A further object of the invention is to provide an attachment which, due to its simplicity of construction and the combination of coils employed in connection therewith, renders its use for the purposes set forth exceedingly simple and expedient and enables a most ready attachment and manipulation when used in connection with its associated circuits and instrumentalities.

A further object of the invention is to provide a unit assembly especially adapted for. use in connection with what has now become known in the art as the Growen inductance coil mounting unit.

Further objects ofthe invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and relative arrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings and finally pointed out in the appended claims. Referring. to the drawings:

Figure 1 is a plan view of the attachment of my invention, showing the same in operative position with reference to a standard form of receptacle or mounting therefor.

Fig. 2 is a view in side elevation of the same, partially sectioned.

Fig. 8 isla view in front elevation of the same, partially sectioned.

Fig. 4L isa plan view of the same in horizontal section.

Fig. 5 is a similar view, largely diagrammatic, to-illustrate the wiring connection employed.

Fig. 6 isa diagrammatic view showing the wirin' employed in my attachment.

The same part is designatedv by the same reference character wherever it occurs throughout the several views.

A radioreceiving station responsive to all wave lengths necessarily requires several types of receivers for the most eflicient reception of the various wave lengths ranges, one type being most elicient for short waves and one or more other types being most efficient for Hhe intermediate and longer waves. rlhe usual practice, particularly in the amateur station is to use a triple coil plug mounting, holding three of a variety of, and interchangeable, plugged coils of various inductance values to permit reception on all ranges of wave lengths. This arrangement has proven satisfactory and efficient on wave lengths from approximately 600 meters to 25,00() meters, inclusive, but is inetlicient for reception on the range of wave lengths below (300 meters. This type of coil mounting, while illustrated herein, and will be briefly described, is the standard structure and in itself forms no part of my present invention except when used in connection with the unit of my invention. The standard structure of mountinor is illustrated, for example, in Letters latent No. 1,365,170, granted January 11, 1921, to R. F. Gowen. lVhen it is desired to receive wave lengths lower than G00 meters efflciently, it is generally necessary for the operator to resort to purchasing or building a special instrument for short wave reception so'thathe has at least two distinct and separate equipments for efficient reception on all waves.

One of the objects of my invention, when practiced in connection with radio communication, is to eliminate the necessity of the complete additional short wave instrument by making use of the triple coil mounting for short waves, and having, instead of three separate plugged inductance coils (for example, as illustrated in the Gowen patent hereinabove referred to) a distinctly different and eflicient short wave unit adapted to be insertedy as a unit in their stead.

In accordance with my invention I provide an economical arrangement of necessary inductances in combination with a multi-plug contactor to permit its use in circuit with the conventional duo-lateral or honeycomb type of triple coil mounting, and'` at the same time produce an efficient coordinating element which is comparatively simple and inexpensive in construction and so designed and applied as to render bulky and more costly apparatus, usually necessitated, unnecessary.

1 accomplish the objects of my invention by providing an inductan'ce coil in the electrical field of force in which is located two smaller inductanccs each capable of being` revolved in variometer fashion with respec to the outer inductance, with or without energy transferrence relationship between the two revolving elements and a multi-plug contactor, having plugs and jacks electrically connected to its respective inductance elements. A

Referring to the drawings illustrating the invention, and particularly as shown in Figs. l, 2 and 3, I have shown the table or upright type of coil mounting as illustrative. In this arrangement the mountingv consists of a baseboard l on which is mounted a suitable frame 2 generally containing three sets ofplug and ack blocks generally designated at a. One of the blocks, usually the intermediate one, is stationary and the two side blocks are mounted on shafts 5 one end of which meshes with a gear 7 mounted on shaft 8 and controlled by a rotatable handle 9. This is the one standard type of mounting shown and described more in detail in the Gowen patent, above referred to` and in itself forms no part of my present invention. Of course, in connection with this type of mounting terminal posts l0 are provided for completion of the electrical circuit, in which coils are included. Itl is customary, with this type of mounting, to employ honeycomb coils provided with a block containing a plug and jackconnected rer spectively to the terminals of the coils,

which plug and jack complete electrical circuit with the plug and jack of the mounting hereinbefore described. By means of the handles 9 operation with the coupling between the respective coils is easily and independently obtained. As hereinbefore briefly stated, to enable operating on various wave lengths it is necessary in this type of mounting, which is universally used, to havev coils of varying values of lnductance. The

unit of my invention is especially applicable to this type of mounting and renders the same efficient for wave lengths shorter than 60() meters; and while, therefore, I do not desire to be limited or restricted tothis particular type of mounting, I have nevertheless, shown my invention as applied thereto, l

as one instance of its utility.

In accordance with my invention, I employ a body structure 20 which I find preferably to be in the form of a cylinder and of insulating material. Secured to this body structure at the front thereof, and generally designed to give the same rigidity Yand strength, is a front piece 2l, and at the back thereof is a bracket structure 22. lVhile I do not desire to be limited or restricted in this respect, I prefer to form the bracket structure 22 of hard insulating material such as wood, rubber, bakelite or the like. The

bracket structure 22 in effect forms the block of the unit of my invention and contains therein three plugs in alignment with each other, the plugs and jacks being so aligned and positioned as to cooperate respectively with the plugs and jacks of the mounting piece on frame 2. IVound on the exterior of the body 20, and preferably in two sections, although in series, is one inductance size or shape of variometer coil emplo ed.

and have, therefore, merely illustrate a standard type of variometer coil, and show the same revoluble. The variometer coils 25a and 25) are mounted on shafts 26a and 26 respectively which are controlled by means of knobs or handles 27 at the front of theV attachment. The handle 27 may have secured thereto a graduated plate 28, if desired, to indicate visibly ythe adjustment given the variometer relative to a fixed point on the frame 21. The rear end of shafts 2GLL and 26') of the variometers are provided with pigtail connections 29L and 29D respectively to the plug and jack 30, 31,'respectively of the block 22. lith this construction, it will readily be seen that either of the variometer coils may be rotated relative to each other, or the fixed coil 23, and thereby effect a fine adjustment of tuning. f

Of course, itl is necessary to provide means for limiting the rotation of the shafts to prevent breakingv the pigtail connections between the ends of the coil thereof and the plug and jack 30 and 31 thereof. Any standard means may be employed for this purpose, and I do not desire to be limited or restricted to any specific t-ype thereof.

It will be seen from the foregoing that I have provided an exceedingly simple and eliicient unit which, as a unit, may be inserted in the standard type of mounting, and with this single attachment, as distinguished from an entirely different equipment, I am enabled to obtain variometer adjustment and therefore enable the use thereof in connection with short Wave lengths such as of the order of less than 600 meters. In addition thereto it will be apparent that I have provided a unit for short wave lengths which in itself is a highly efficient structure and which may be manufactured in varying sizes for most efficient tuning, irrespective of wave length. Likewise, .while it is specifically adaptable to the standard type of mounting of the plug and jack` type, it is not necessarily, however, limited thereto, and may be mounted, as desired, irrespective of the honeycomb coil mounting set forth.

Many modifications and changes in de tails will readily occur to those skilled in the art Without departingfrom the spirit and scope ot my invention as delined in the claims 5 but having now set Jforth the objects and nature of my invention and having` shown and described a structure embodying the principles thereof, what I claim as new and useful and of my own invention, and desire to secure by Letters Patent, is:

l. An inductance coil structure comprising a supporting body, a pair oit spaced inductance coils supported thereby on parallel axes, a iXed coil also supported by said body and positioned intermediate the inductance coils, and provided with portions inductively associated with said inductance coils, a block also carried by said body, and plug and jack terminals for all of said coils carried by said block.

2. :in inductance coil structure comprising a supporting body, a plurality of coils supported Within said body on diainetrical axes of said` body, a stationary coil wound around said body, and inductively associated with said plurality of coils, a block also carried by said body, and plug` and jack terminals for all of said coils carried by said block.

ln testimony whereof I have hereunto set my hand on this 27th day of December, ifi. D. 1921.

HERBERT BRGNN PEARSON.

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