US2547085A - Condenser assembly - Google Patents

Description

April 1951 J. R. MAZZQLA 2,547,085

CONDENSER ASSEMBLY Filed May 1, 1948 3 Sheets-Sheet 1 l a j. 1&2.

Him? "'l'ilmi I '5 ii 'l ljic .3 47b 12 2q 5 17b 13 April 3, 1951 J. R. MAZZOLA CONDENSER ASSEMBLY 3 Sheets-Sheet 2 Filed May 1, 1948 INVENTOR.

April 1951 J. R. MAZZOLA 2,547,085

CONDENSER ASSEMBLY Filed May 1, 1948 3 Sheets-Sheet 3 A13 EC EB JNVENTOR.

Patented Apr. 3, 1951 UNITED STATES PATENT OFFICE CONDENSER ASSEMBLY Joseph R. Mazzola, Kearny, N. J., assignor to Automatic Manufacturing Corporation, Newark, N. J a corporation of New Jersey Application May 1, 1948, Serial No. 24,620

3 Claims.

This invention relates to the condenser and coil assemblies of the general type disclosed in the U. S. patent to Ketcham No. 2,435,630 issued February 10, 1948, which assemblies are useful as so-called intermediate frequency transformers and for certain other purposes. In some circuits in connection with which devices of the above character may be used, it is necessary to provide capacity units additional to those disclosed in the above mentioned Ketcham patent, and in certain instances an extra terminal strip or strips may be desirable, even when no additional capacity unit be needed.

The invention aims to satisfy special requirements of the above character, which are difficult to provide for in a practical manner in view of the space and design limitations with which such devices are subject. Further objects and advantages of the invention will be in part obvious and in part specifically referred to in the description hereinafter contained which, taken in conjunction with the accompanying drawings, discloses a preferred form of condenser and coil assembly constructed to operate in accordance with the invention; the disclosure however should be considered as merely illustrative of the invention in its broader aspects. In the drawings Figs. 1 and 2 are side views, taken at right angles to each other, of a condenser and coil assembly constructed in accordance with the invention, certain parts of the exterior housing being "cut away.

Fig. 3 is an end view taken from the bottom of Fig. l. i

Fig. 4 is a section on the line 44 of Fig. 1 looking in the direction of the arrows.

Fig. 5 is an exploded perspective view of the condenser assembly.

Fig. 6 is a central transverse section through the condenser assembly, the latter being shown detached.

Figs. '7 and 8 are side views of the condenser assembly shown in Fig. 6, taken at right angles to each other.

' Figs. 9 to 12 are schematic diagrams illustrating various circuit connections to which assemblies constructed in accordance with the present invention are applicable.

' The assembly is shown in Figs. 1 to 4 as contained within an outer housing i which may be of metal and clamped to a chassis or the like to serve as an electrostatic shield as set forth in the Ketcham patent above mentioned. For present purposes the coil and core structure need not be described in detail; in Fig. 2 I have shown two cores 2, which may be understood as held in position between frame pieces 3 by U-shaped clips 4 in the manner described in the Ketcham patent, the frame pieces 3 extending longitudinally of the coils and cores on opposite sides thereof, and being provided with extensions 5 (Fig. 1) which overlap and hold between them the main supporting block 6 which carries the condenser assembly.

The construction of the condenser will be best understood by reference to Fig. 5. As there shown the supporting block 6 is provided with corner posts I receiving between them a pressure distributing plate 8 in such manner that the laminae of the condenser are clamped between opposed faces of the members 5 and 8 by a hollow rivet e or equivalent clamping member which passes through alined central holes in the elements of the condenser and engages a spring washer II) which overlies the plate 8. The parts I3 and 8 will usually be of molded plastic.

The condenser assembly is shown as having three capacity units served respectively by the terminal strips II, l2, the terminal strips I3, I4, and the terminal strips I5, I6. In assembling the condenser the terminal strip I6 is first inserted through a groove I! of inverted T cross section in block 5, until its contact arm ISa lies against the inner face of block 6. It should be noted that the groove I! in general lies between two of the corner posts I but is displaced somewhat inwardly toward the center of block 6; also the contact arm Ifia is laterally ofiset with respect to the terminal strip I6, to extend partially around the clamping member 9 and in spaced ,relation thereto when the latter is inserted.

Then a dielectric sheet I8 of mica or the like is placed over the contact arm Isa, this insulating sheet I8 having opposed conducting films I8a (Fig. 6) which may be of silver or the like, upon its opposite surfaces. Then the terminal strip I5 is inserted in a groove IIa in block e, which groove is similar to the groove I! and located in the opposite side wall of the block, until the contact arm I5a of terminal strip I5 engages against the adjacent conducting film I8a, the contact arm I5a being laterally offset similarly to the complementary contact arm Ifia, but in the opposite direction so as to overlie the latter. Thus the two conducting films I 8a constitute a capacity unit served by the terminal strips I5 and I6.

Then a dielectric sheet I9 is laid over the contact arm 15a, this insulating sheet carrying on its opposite surfaces opposed conducting films ISa. The terminal strip I2 is then inserted through 3 one of the grooves l'lb adjacent a corner of block 6, until its contact arm 42a engages the adjacent conducting film I9a. Thus the two conducting films Ida constitute a second capacity unit served by the terminals I2 and I5.

The terminal strip is is also inserted through another one of the slots lib adjacent another corner of block 6, until its contact arm Ma engages the upper surface of insulating sheet i9. It will be noted that this contact arm is shaped to provide oppositely displaced raised portions Mb (Fig. 5) which in effect double the thickness of the contact arm. This is done to balance the thickness of the laminae which lie respectively on the left and right hand sides of Figs. 5 and 6; as shown in Fig. 6, for example, the insulating sheets I8 and i9 bend downwardly somewhat on the right hand side of the figure, and the raised portions 14b add extra thickness to this right hand side. I

Then a dielectric sheet 2c is placed over the contact arms 12a and Ma, said sheet having upon its opposite surfaces, opposed sets of conducting films 28a and 2%. The lower conducting film a engages certain raised portions Nib of the terminal strip it, and the lower film Zeb engages the Contact arm i2a.

The terminal strip H is then inserted through one of the slots llb adjacent one of the corners of block 6 until its adjacent contact arm I la engages with the top conducting film 23b. Also the terminal strip is is inserted through the groove l'lb near the remaining corner of block 6, said last mentioned terminal strip having a contact arm Ilia provided with raised portions l3!) similar to the parts l lb previously described. Thus the conducting films 2M constitute a capacity unit served by the terminals 33 and i l, and the conducting films 20b constitute another capacity unit served by the terminals ii and i2. The pressure plate 8 and washer It"! may be then placed in position on top of the assembly above described, and the rivet 9 applied under pressure to hold the parts in the form shown in Figs. 6 to 8; with the pressure applied to the contact arms.

The above type of construction accordingly results in a condenser assembly in which two rows of three terminal strips each are provided along two opposite sides of the block 6, with the terminals l5 and i5 occupying an intermediate position and the remaining terminals located near the respective four corners of block This leaves the central spaces between the two remaining sides of block 6 free to allow the base 2i (Figs. 1 and 2) of a U-shaped spring metal mounting clip to pass across the end of the assembly between the two rows of terminals, said spring clip having lugs 22 (Fig. l) which look releasably in complementary recesses in housing .i, to clamp the assembly to a chassis 23.

To accommodate the conductors leading from the coils above mentioned to the condenser terminals, each of the frame pieces 3 is shown as provided with lacing lugs 24 (Fig. 1) spaced along one side edge thereof and having spaced sets 25 and 26 (Fig. 4) of conductor receiving notches. As shown at the left of Fig. 1, a conductor 2! leading from a coil is laced through the notches 26 and through the adjacent groove ill) to the terminal strip [2. An adjacent conductor 28 is laced through the notches 25 and is then received in a passageway 29 (Figs. 1 and 3) which runs along the extension 5 of the frame piece to the adjacent groove Ila, from whence the conductor 28 runs to terminal strip 55. In the illustrated asrzoss T A T F l n. r., f

4 form of the invention the remaining side edges of the frame pieces are provided with locking lugs 30 (Figs. 1 and 4) having a single set of notches 31 therein to accommodate conductors leading respectively to the terminal strips l I and I3, the terminals I4 and I6 being served in the manner above described in respect to the terminals I2 and i5 respectively.

Figs. 9 to 12 illustrate various circuit connections of the coils and capacity units which may be made with the aid of assemblies of the type above described, Fig. 9 showing an AM hook-up appropriate for use with diode sections and involving the utilization of all six of the terminal strips previously described, the terminal strips adjacent the corners of the condenser assembly being marked A, B, C and D, and the intermediate terminal strips being marked E and F. Fig. 10 shows a hook-up sometimes used in both AM and PM circuits, in which the coils and the capacity units are separately terminated. Fig. 11 shows an FM discriminator hook-up involving the use of the five terminal strips A, B, C, D and F, the intermediate terminal strip E being idle in this instance. Fig. 12 shows a modified FM hook-z up which also involves the use of five of the ter-' minal strips, and is appropriate for use as a ratio detector. The above diagrams are illustrative of various capacity unit and coil combinations and connections which may be readily obtained-by assemblies of the type above described.

While the invention has been disclosed as ems bodied in an assembly of the above described specific construction, it should be understood that changes may be made therein without de parting from the invention in its broader aspects, within the scope of the appended claims.

I claim:

1. A multi-unit condenser assembly of the character described including a supporting block having rows of terminal strips disposed respectively adjacent opposite sides thereof, a plurality of insulating laminae adjacent one face of said block having opposed sets of conducting film constituting a plurality of capacity units, said terminal strips having contact arms engaging films of said units, a central clamping member extending through said block and laminae, at least one of said rows including a. terminal strip located in the intermediate por-,- tion of one of said first mentioned sides of said block, said last mentioned terminal strip having a contact arm oifset to extend partially around said clamping member into engagement with one of said conducting films.

2. A multi-unit condenser assembly of the character described including a supporting block having rows of terminal strips disposed respectively adjacent opposite sides thereof, a plurality of insulating laminae adjacent one face of said block having opposed sets of conducting film constituting a plurality of capacityunits, said terminal strips having contact arms engaging films of said units, a central clamping member extending through said block and laminae, each of said rows including a terminal strip located in the intermediate portion of its respective side of said block, said last mentioned terminal strips each having a contact arm offset to extend partially around said clamping member into engagement with one of said conducting films.

3. A multi-unit condenser assembly of the character described including a supporting block having rows of terminal strips disposed rerespectively disposed near the corners of said block and other terminal strips respectively located in the intermediate portions of said first mentioned sides of said block, said last mentioned terminal strips having said clamping member interposed between them, and each of said last mentioned terminal strips having a contact arm off-set to extend partially-around said clamping member into engagement with one of said conducting films.

JOSEPH R. MAZZOLA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Ketcham Feb. 10, 1948 Number

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