US1765051A - Recording means - Google Patents

Description

June 17, 1930. F. CAPPS RECORDING MEANS Filed June 7, 1926 2 Sheets-Sheet l INVENTOR. flan/1; L. ap

A TTORNEY June 17, 1930. CAPPS 1,765,051

RECORDING MEANS Filed June 1926 2 Sheets-Sheet 2 J32 if INVE TOR.

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Patented June 17, 1930 FRANK CAPPS, @F MILFQRD, CONNEGTICUT, ASSIGNOR T (JQIIUIA JPEQNGGH sour, INQ, 0F BRIDGEJPQBT, CONNECTICUT, A CQRPQEATION OF NEW RECORDING- MEANS Application filed June F, 1926. Serial No. 114,119.

This invention relates to means and methods for recording 'sound and has particular reference to electrical means and methods for this purpose. v

An object of the invention is to provide a sound recording method and a sound recording means for carrying out the method, which method and means provide for complete control of the recording operation.

A further object is to provide an electrical sound recording means, with resilient restraining elements which operate to hold the armature of the recording means against free movement. 7 T

An additional object is to provide a sound recording means with resilient restraining elements, whichare in contact with the point or tool carrying part of the recording means and at least one of which is compressed by so movement of the said means during the recording operation. 7 A more specific object is to provide an electrical sound recording device with resilient elements, as, for instance, rubber as pads, in contact with the armature of the recorder and at least one of which must be compressed by movement of the armature during the recording operation. lhese pads provide for the control of the armature, to which carries the recording stylus and prevents excessive, or'too free movement of the armature, and in this way prevents blasting, etc.

Still another object is to provide an improved mounting for the armature of the recording device.

A further object is to provide an improved mounting for the recording means as a unit. Further objects are to generally improve recorders, to simplify their construction and operation, to render them more sturdy and less liable to get out of order and to provide a recorder which may be easily and cheaply constructed. Other and additional objects will appear from a consideration of the following descriptlon, taken 1n connection with the accompanying drawings, wherein satisfactory limited to the specific structure'shown, since i many changes in the construction and arrangement of the parts will readily suggest themselves to those skilled in the art. Therefore, reference must be had to the appended claims for a definition of the limitation of the invention.

In the accompanying drawings Fig. 1 is a side eievational view showing the recorder in full lines and in cutting position, the support for the recorder being shown in dotted lines;

Fig. 2 is a view looking to the right in Fig. 1, the supporting means being omitted;

Fig. 3 is a vertical sectional view, substantially on the line 33 of Fig. 4;

Fig. 4 is an elevational view looking into the under side of the recorder;

.Fig. 5 is a transverse sectional view substantially on the line 55 of Fig. 4;

Fig. 6 is a similar sectional view substantially on the line 66 of Fig. 4;

Fig. 7 is a-front elevation of a slightly modified form, showing a difi'erent construction of armature and restraining means;

Fig. 8 is an elevational view looking into the under side of the recorder shown in Fig.- 7;

Fig. 9 is a fragmentary sectional view along the line 9-9 of Fig. 8;

Fig. 10 is a transverse sectional view on the line 1010 of Fig. 8;

Fig. 11 is a fragmentary transverse sectional view on the line 11-11 of Fig. 8;

Fig. 12 is a sectional view through the armature and restraining means therefor of a further modified structure; and

are

ri ht angles to that figure.

eferrin in detail to that form of the inventions own in Figs. 1 through 6 of the drawings,1 indicates a recorder in its entirety,.while 2 indicates fragmentarily the sup rting means therefor which includes a t iimb screw 3, adapted to be threaded into an o enin in the mounting plate 4 of the recor er. his mounting plate includes a rear section 5 provided with depending ears 6 enlarged at their lower ends to provide bearings 7 for a shaft 8. Disposedon the shaft 8, and between .and in abutting relation, with the bearings 7 is a sleeve 9 rovided with a projection 10 carrying at its free end a plate 11. Projecting upwardly from sleeve 9 'when the recorder is in operative position, as shown in Fi s. 1 and 2, IS a finger 12 which is rigid with t e sleeve. This finger as will more fully appear, co-operates in the elevating or moving into inoperative position, of the recorder.

Mounted in the ears 6 and above and forwardly of shaft 8 is a second shaft 13. One end of said second shaft has a hand piece 14 secured thereto to move therewith and this hand piece carries a cam 15- adapted when the hand piece is rocked to the left (Fig. 1) to engage the finger 12 and rock it and the entire recording apparatus about the shaft 8, thereby moving the recorder to inoperative position. Stop pin 16 limits the movement of the hand piece in one direction. A second stop pin 17 is positioned to engage a lug 18 on the hand iece and limit movement of the hand piece n the opposite direction.

the shaft 8 to a considerable extent.

As is readily observable in Fig. 2, the hand piece 14 has a sleeve portion .19 which abuts against the outside of one of the ears 6, and positioned. on the opposite side of this ear, and in abutting engagement therewith is a collar 20 secured to shaft 13. Longitudinal movement of shaft 13 relative to the remainder of this structure is in this way prevented, and the cam 15 maintained in proper relation to finger 12 so as to auto-. matically come into engagement therewith upon the hand piece being shifted as above described. a

The recorder 1 has free movement about This is necessary when recording since it permits of the recorder moving up and down to comensate for any similar movement or irreguarity in thewax tablet 21 (Figs. 1 and 2).

To provide means for regulating the depth of out being made, a bar 22 is secured in extension 23 formed on the sleeve 9. Adjustable longitudinally of this bar is a weight 24 adapted to be held in this adjusted position by means of a thumb screw 25.

. Carried by the supporting plate 11 is the 1,7es,os1

recordin means proper, which includes a pair of field magnets 26 and 27, including coils 26 and 27, energized by direct current and each having their respective poles in the same direction. For the purpose of illustration, it will be assumed that the north ole of each of the magnets is at the lower or orward end of the magnet, and that the south pole of each of the field magnets is at the upper end thereof. Current enters the coils of the magnets through wires 28 which are carried by binding posts 29 insulated from the mounting plate 4, as at 30, and a wire 31 connects the coils of the magsired, the magnets 26 and 27 may be permanent magnets and the coils 26" and 27 a would then be dispensed with. 1

These magnets 26 and 27 include cores 32 which have their ends reduced as at 33 and 34. These ends are screw-threaded as indicated, and the ends 33 pass through openings in the plate 11, while the ends 34 pass through openings in a hea plate 35. heavy plate being dispose as it is in contact with the north pole ends .of the magnets has the same polarity. Plate 35 is cut away centrally and provided with'an upstanding lip 36 which surrounds an armature or tool carrier 37. Since the plate is magnetized, it has an influence on the armature and this influence being at the edges of the armature, tends as little as possible to move the armature on its pivots. Armature 37 is mounted on pivot screws 38 (see Fig. 5) on which it is adapted to move during the recording operation.

Core pieces 39 are clamped against the south pole ends of the magnets 26 and 27 by being dis osed between such ends of the magnets an have extensions 40 which are disposed within speaker coils 41that is, electro-ma netic coils in the amplifying telephone circuit. Extensions 40 will of course both be south pole magnets, in view of their relationship to magnets 26 and 27. a

The speaker coils 41 are energized either by pulsatory or alternating current when the device is in operation. The a paratus is polarized by the field coils and t e armature and cutting tool are influenced by any current passing through the telephone coils whether it be fluctuations of a continuous This a the plate. 11. These cores 39 I are held in place by adjustable screws 45,

adapted to be'secured in their adjusted positionby means of jam nuts 46. The pads are, of course, of very soft rubber'and as the armature is oscillated on its pivots, one of flexible steel wire.

the pads is compressed as the armature is moved from the other and toward the core extension which is above the other. Since both ofthese pads are in contact with the armature in the normal position of the latter, the armature is securely held against any free movement, and in addition, thesepads act to restrain the armature, preventing excessive movement thereof under the influence of the magnets during the recording operation. Moreover, these pads tend to move the armature to a neutral position. It is necessary to so restrain the armature in order that the records ultimatelyproduced may have the proper tone quality. When the armature has a free or pendulum like movement, the small vibrations are lost and a true record cannot be obtained. Rubber especially lends itself to this function, since a thin piece is used and may be readily compressed'to a slight degree but after that is comparatively incompressible and strongly resists further movement of the arniature. These adjustment screws are-supported by means of triangularly-shaped plates 47 (see Fig. 4) secured tothe heavy plate 35 by any suitable fastening means 48.

Referring nowto Figs. 7 through 11, it will be noted that I have provided a modified means for supporting the restraining 'pads or discs in place, and in addition, a

novel form of armature or tool carrier 50 and supporting means therefor is disclosed. The remainder of the structure of these figures is the same as that in the figures previously described.

The armature 50 comprises a frame work or skeleton of brass having a central portion 51, and comprising side bars 52, also of brass, connected by end pieces 53 of iron or other material which will be attracted by the magnets. The central portion 51 of this armature has its ends reduced, as at 54, and set into recesses 55in the plate 56, which corresponds to plate 35 in Figs. 1 to 6. The reduced ends 54 of the central portion 51 of the armature are tapped and screw-threaded to receive the screw-threaded ends of mounting means 57, which are preferably pieces of The non-threaded ends of these pieces 57 are soldered in place, as at 58, so that they are rigidly held.

In the operation of the armature, this mounting means holds it against free movement, and in addition, prevents any rattling due to relative movement between the armature and its supporting means. As the arma- 'ture is rocked, due to the influence of the magnets,- these connecting pieces, which, as stated above, are preferably,al though not necessarlly, of flexible steel wire, mustbc .flexed back and forth. Being rigidly sccured in place, there can of course be no sound generated, due to movement'of the wire .or due to movement between the wire and the supporting means or armature. This means of mounting the armature may be used in connection with each of the modifications shown.

Cushions or pads of rubber 59 are rovided, and are held in contact with eac of the iron cross-bars 53 of the armature 50 by means of a bowed piece 60, preferably formed of brass. As shown, piece 60 has a central portion upwardly curved, or bowed, and disposed above the portion 51 of the armature, while its end portions are substantially flat and are held in contact with the pads or discs 59 by means of adjustable screws 61 which pass through plates 62, similar to the plates 47 of the form shown in Figs. 1 to 6. Screws 61 are adapted to be held in their adjusted positions by means of nuts 63.

As shown in this modification, the plate 56 has an upwardly extending lip 64 at each end of the armature and in line, or substantially in line, with the iron cross-pieces 53 so as to influence'them from the ends and not tend to move the armature either up or down. Moreover, in this figure, movement of the armature will depend upon the compression of the pads 59 as in the case of the structure shown in Figs. 1 to 6. r

In Figs. 12 and 13, a further modification of supporting or restraining pads is shown. These pads 64 are, preferably, in the form of strips of soft rubber received in sockets or grooves 65in cross-bars 66. Adjustable screws 67 support these crossbars and are adapted to hold the strips 64iin contact with the under-side of the armature or tool holder at each side of its pivot. Nuts 68 hold the screws in their adjusted positions. As shown, these screws pass through screw-threaded openings in plates 69, similar to the plates 17, of that form of the device shown in Figs. 1 through Also, in this modification, the armature 70 is supported upon pivot screws 71 identical with pivot screws 38 of the first form of the invention.

While the restraining means has in each instance been disclosed as a rubber pad, it is to be understood that this is the preferred form of the invention, it having been determined that while metallic springs may be' used with more or less success, and while other compressible means may be used with some success rubber is the preferred means.

Also, it Wlll be understood that while the mounting of the armature on elements,

which. must flex to form movementof the armature, has been disclosed only in Figs. 7 through 11, this mounting of the armature may be used in any of the other figures with equal success.

Furthermore, although the invention has been described as a recording apparatus, it will be understood that the identical structure shown may be used for reproducing sound from a phonogra h record orthe like.

Having thus describe the invention, what I claim is:

1. In a recording device, a pivoted armature, cushion means at each side of the pivot of said armature, and adjustable means for maintaining said cushion means in contact with the armature in the normal position of the latter for preventing free movement thereof about its pivot, and non-magnetic.

means supporting said adjusting means.

2. In a recording device, a movable armature, resilient means restraining said armature a ainst free movement, and means'for adjustlng said resilient means, and non magnet-ic means supporting said adjusting means.

3. An armature for electric recording device, the same comprising a skeleton frame ortion and including a central mounting side portions of non-magnetiza le material and connecting end portions of magnetizing material. I

4. A device as in claim 3, the central and side portions being of brass and the connecting end portions being of iron. I

5. In combination, a pair of magnets having their like poles disposed in the same direction, a plate influenced by said magnets, said plate having an opening, a pivotally mounted armature disposed in said openin and normallfy lying in a lane parallel .wit the plane 0 said plate, amping means engaging the armature, and means supporting the damping means, said supporting means including non-magnetic means carried by the plate.

6. The combination as in claim 5 wherein said damping means is in the form of strips of resilient material projecting from rigid holders. 7

7. The combination as in claim 5, said supporting means including adjustable means or moving the damping means toward and from the armature.

8. In combination, a pivoted armature, means for controlling movement of the armature about its pivot, said means including rubber strips contacting with the armature at each side of its pivot, non-magnetic holders for said strips and adjustable means supporting the holders.

9. In combination a pair of magnets having their like poles disposed in the same direction, a plate influenced by said magnets

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