US1265502A - Phonograph. - Google Patents

Description

M. B. PEAL, PHONOGRAPH.

APPLICATION FILED APR.20, 191's.

Patented Y May 7,1918.

@FFTGE.

' MARSHALL :e. PEAL, or BROOKLYN, NEW roux.

PHONOGRAPH.

To all whom it may concern Be it known that I, Mnnsnann B. PEAL, residing at Brooklyn, in the county of Kings and State ofNew York, have invented certain new and useful Im rovements in Phonographs, of which the ollowing is a specification.

. This invention relates to a phonograph,

- and particularly to means for automatically so more or less specific than those referred to or needle.

A further object is to provide a device which may be either incorporated into the record at the time of manufacture of the record, or which may be attached to thereoord at a subsequent time adapted to cooperate with features of the phonograph machine for causing the operation ofthe machine to cease at a pre-determined time.

Other objects and aims of the invention,

above, will be in part obvious and in part pointed out in the course of the following escription of the elements, combinations, arrangements of parts and applications of principles, constituting the invention; and

the scope of protection contemplated will be indicated in the appended claims.

In-the accompanying drawings which are to be taken as a part of this specification, and in which I have shown a merely preferred form of embodiment of the invention:

Figure 1 is a top plan view bf a phonograph machine having a record in position thereon, provided with this invention, certain mechanism of the machine being illustrated diagrammatically.

Fi 2 is an enlarged vertical detail sectiona view taken upon the plane of line IIII of Fig. 1.

Fig. 3 is a fragmentary sectional view taken upon the plane of line IIIIII of Figs. 1 and 2.

Fig. 4 is a similar view. taken uponthe plane of line IVIV of Fig, 2.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed April 20, 1916. Slarial No. 92,568.

Fig. 5 is a perspective view of one of the parts included in this invention.

Figs. 6, 7 and 8 illustrate modifications.

Fig. 9 is a perspective View illustrating a further modification; and v Fig. 10 is an enlarged sectional view illustrating still a further modification.

Referring to the drawingsfor a detailed description of the structure illustrated therein, the reference character L indicates the box or casing of the. phonograph machine, and G the rotatable table carried thereby. The sound horn is indicated by the reference character H, and is pivotally mounted upon the casing to permit the styhis or needle 1 of thereproducer 2 to travel freely along the sound producing surface of the record toward and away from the center post 3 of the table G in the usual manner. 7

Any suitable means may be employed for rotating the table G. In the drawings an electric motor 4 is illustrated for this v,purpose, the same being driven from a suitable source applied through the wires- 5 and 6,. and being controlled by a switch 7 arranged in the wlre 6 for making or breaking the circuit along said wire. 1

If desired, a brake may be employed. In the drawings the reference character 8 indicates a form of brake for illustrative purposes. This comprises an arm which is mounted upon a rotatable spindle 9 and which is provided with a friction surface 10 disposed to be pressed into braking contact with the peripheral portion of the table G when the spindle 9 is rotated. An arm 11 is also provided upon the spindle and this is furnished with an armature 12 arranged to be controlled-by anelectro-magnet 13. A link 14 connects the arm 11 with the switch 7 so that when said arm is drawn groove in the record. The outer end, a519,

may be enlarged and may, if desired, be provided with a groove 20 registering with the innermost convolution 18 of the sound producing groove. The inner end is adapted to make electrical contact with the post 3. Any suitable means may be employed for improving the quality of the electrical contact with the post, but for simplicity that illustrated in Figs. 2 and 5 will serve as an illustration. This means includes a downwardly bent portion 21 at the inner end of the contact member, said portion 21 extending into the opening 16 and comprising a resilient finger adapted to produce a constant pressure against the post. Both the contact member and the post being of metal, it follows that an electric current may be transmitted from one to the other through the finger 21.

When the stylus or needle 1 has moved inwardly into the innermost convolution of the sound producing groove, and the outer end of the contact member 17 rotates into engagement therewith, electrical contactwill be made between the stylus and the contact member.

A circuit for the magnet 13 will be established as follows: from the source 22 along wire 23 to a brush, or its equivalent, 24, into electrical connection with the post 3 of the table, from the post 3 along the contact member 17 through the stylus 1 through the horn arm H, along wire 25, through the magnet 13, and along wire 26, back to the source.

The outer end of the contact member 17 may be disposed precisely at the end of the innermost convolution of the sound producing groove, if desired, but usually it is sufficient to dispose the outer end of the contact member at a point somewhat beyond the end of the sound producing groove so as to be engaged by the stylus after the stylus has completed the travel of the groove. 7

Since the contact member 17 need be only of extremely thin sheet metal, it may rest directly upon the face of the record disk. However, as a simple means for connecting the contact member with the disk, this invention contemplates that the contact member be pressed or sunken into the surface of the disk, preferably at a time when the disk is not fully hardened. The marginal edges of the contact member may be beveled so as to obtain a better grip upon the material of the disk, if desired, as illustrated at 27 in Figs. 3 and 4:- By sinking the contact member into the surface of the disk, the groove 20 in the outer end of the contact member may be brought to stand more closely in register with the innermost convolution 18 of the record as clearly shown in Fig. 4. A slight shoulder-like portion 28 is provided so as to render the electrical engagement of the stylus with the contact member more positive and effective.

If found necessary, the contact member may be fixed to the disk by small rivets 29, as shown in Figs. 6 and 7.

Also the contact member may be duplicated if desired, at opposite surfaces of the disk. In fact, .in some cases it may be desirable to form the contact members for the opposite surfaces of the disk as a single piece of metal bent through the opening 16, as shown in Fig. 7 In this case the intermediate bent part 30 will serve as a resilient portion for engaging the post 3.

When the contact members upon the two surfaces of the disk are formed as separate members, they may, if desired, be connected by a thimble-likemember 31, as shown in Fig. 6. The member '31 provides flanges 32 for engaging and retaining the contact members,and it provides a somewhat resilient central portion 33 for engaging the post.

In Fig. 8a modification is illustrated in which a thimble portion is provided directly upon the contact member, said thimble portion being formed with resilient sections 34 for engaging the post.

In Fig. 9 a modification is illustrated'in which the contact member is-provided with a' pair of resilient bendable fingers 35. Where it is desired to attach two of these contact members to the two surfaces of the disk, the pair of fingers 35 of one may be extended through the opening in the disk and bent to engage portions of the other contact member,- while the pair of fingers 35 of the other contact member may be extended through the opening in the disk and bent to engage portions of the first contact member. The pairs of fingers are preferably arranged in planes at angles to each other in the two contact members in the manner illustrated in Fig. 9.

Fig. 9 also illustrates a simple expedient for providing adjustability in the length of the contact member. Any suitable means may be employed for providing adjustability. The means illustrated includes providing a loop 36, thetwo legs 37 and 38 of which may be bent toward or away from each other to alter the length of the contact member. After the proper adjustment has been attained, then the loop may be bent down flat against the adjacent portions of i the contact member, as illustrated by the dotted lines.

Although it is preferable to embed or sink the contact member into'the material ciples of this inventionlimited to the reproduction of sound from aacepoa where the contact member is made of. sulficiently thin material, the edge thereof will not constitute any appreciable resistance to the passage of the stylus thereover.

'Insome cases it may be desirable to employ thicker material, or otherwise provlde a decided shoulder to be engaged by the stylus. Engagement of the stylus with this shoulder will produce the necessary electrical contact without riding over the shoulder. In this case the movementof the contact member would be arrested by engagement with the stylus and the record disk would rotate for a short distance beneath.

The portion of the contact member which extends into the opening '16 would provide a continuing electrical engagement with the .post and would also provide a pivotal connection between the record disk and the contact member.

It will, of course, be understood that this invention is not to be limited to the use of an electric motor for driving the table G. The movement of the arm 11, or its equivalent, is intended to control any other type of motor, as well as that illustrated.

It will be understood also that the prinare not necessarily the record but may be equally well adapted to the. recording operation.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A contact device for a phonograph disk, comprising a contact 7 ried by the disk extending radially from the central standard receiving opening of the disk, the inner end of the contact forming member being adapted to engage the central standard of the phonograph, the outer end portion of the contact forming member, be-

7 ing'adapted to be engaged by the stylus of the phonograph, and said contact forming member having a bendable portion bendable to alter the length of said contact forming member.

2. A contact device for a phonograph disk,

provided, in the upper surface of the mate-' rial thereof disposed in continuance of the usual music groove ofthe record disk, for receiving the stylus, said groove in the contact forming member being of substantially the same depth as the music groove at the end where it registers with the music groove,

forming member car-.

and having a shoulder-like portion formed therein for the purpose described, 3. A contact device for a phonograph disk,

ried bythe disk extending radially from the central standard receiving opening of the disk, the inner end of the contact forming member being adapted to engage the central standard of the phonograph, the outer end portion of the cont-act formingmember becomprising a contact forming member car:

ing adapted to be engaged by the stylus of i the phonograph, edge portions of said contact forming member being beveled downwardly and outwardly, and said contact forming member bein embedded in the "material of the record isk so that theupper surface of the contact forming member lies substantially flush with the upper surface of the record disk and so that 'saidbeveled edgesengage beneath relatively overhanging portions of the material of the record disk. 4.- A contact device? for a phonograph disk, comprising a contact formingmember carried by the record disk,- said" contact forming member bein made. up of two parts, one part being isp'osed at onef'sur face of the record dlsk and theother part 1 being disposed at the opposite surface 'of'the record disk, and 'means extending through the central standard receiving opening'o the disk serving to hold said twop-arts together and adapted to form engagement with graph.

5. A contact 7 device for a phonograph disk, comprising a contact forming member car- 7 ried by the record disk, said contact forming the central standard of the phonomemberbeing made up of two independently formed parts, one part being disposed at one surface of the record disk and the. other part being disposed at the opposite surface of the record disk, each of sa1d parts having portions extending through the central standard receiving opening of the disk and engag ng the other part to mutually retain said two parts against displacement, and

said portions also being adapted to form engagement with the central standard of the phonograph.

6. A contact device for a phonograph dlsk, comprising a contactlformmg member carried by the record disk, said contact forming member being made up'of two independently formed parts, one part being disposed at one surface of the record diskand the other part being disposed at, the op ,posite surface of the record disk, each of said parts extending radially of the record disk from the central standard receiving opening of the disk, means extending through said opening serving to hold the inner ends of said two parts together and adapted to form engagement with the central standard of the phonograph, and means extending through the disk spaced from said opening for holding the outer ends of said two parts in position upon the record disk.

7. A contact device for a phonograph disk comprising a contact forming member carried by the disk at one surface thereof, said contact forming member having a portion extending through the central standard receiving opening of the disk adapted to form engagement with the central standard of the phonograph, said portion bein extended beyond the opposite surface the record disk and the extended portions being bent over to retain the contact forming member against displacement.

8. A contact device for a phonograph disk, comprising a contact formingvmember carried by the record disk, said contact forming member being made up of two independently formed parts, one part being disposed at one surface of the record disk and the other part being disposed at the opposite surface of the record disk, each of said opposite parts having integral fingers formed thereon extending through the centralstandard receiving opening of the disk into gripping engagement with the other part, and said fingers being resilient and adapted thereby to form frictional engagement with the central standard of the phonograph.

9. A contact device for a phonograph disk, comprising a contact forming member carried by the record disk, said contact forming member being made up of two independently formed parts, one part being disposed at one surface of the record disk and the other part being disposed at merge placement, and said fingers being adapted to engage the central standard of the phonograph,

10. A contact device for a phonograph disk, comprisin a contact forming member carried by the disk extending radially from the central standard receiving opening of the disk, the inner end of the contact forming member being adapted to engage the central standard of the phonograph, the.

outer end portion of the contact forming member being adapted to be engaged by the stylus of the phonograph, and sa1d contact forming member havin its intermediate portion shaped to provlde a pair of legs bendable toward and away from each other for altering the length of the contact forming member.

' In testimony whereof I aflix my signature in the presence of two witnesses.

' MARSHALL B. PEAL. I Witnesses:

L. Gnssrom) HANDY,

'Lonrs BRANDMIER.

Copies of this patent may be obtained for ave cents each, by addressing the "Commissioner of I'atents, Washington, fi. Q.

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