US1855151A - Electrical phonograph pick-up and apparatus - Google Patents

Description

April 19, 1932. w, 1:. JONES 1,855,151

ELECTRICAL PHONOGRAPH PICK-UP AND APPARATUS Original Filed Jan. 25, 1930 J .4 ,la 19 2 9 5 23 23 J5 '21 5 45 22 I -42 4, ":17 16 60 5. d3 :12 451 .Zzuentw; W756Zl 6e Jnes, 74 192655: 1

Patented Apr. 19, 1932 UNITED STATES;

w. nnn'rm'r .rorma'or care nee, mngorg nmc'rmcn'r. rnorroeanrn rIcx-ur nim nrrmrfis Application and January 25, 1880, Serial No. 428,851. Renewed January 9, 1982."

The present invention relates t6 electrical phonographs and to pick-up devices for phonograph records, having particular reference to adevice which is capable of picking up vibrations from records which are cut laterall and from records which are cutvertical y. .T I P The pick-up is not limited to an: alternative use with 'the two types of'records but is so constructed'that it has in addition the ability to pick up with one stylus, two different records in'one groove, one of whichmay be cut laterally and the other of which may be out vertically:-The'entire device may combine the. two picked u p records when they.

filed April 13, 1927 and Serial Number.

311,488, filed Oct. 10, 1928. Reference is also made to copending application Ser. No. 326,023, filed December 14, 1928 "which is in nature generic to the others.

The present application is generic to the pick-up device itself and specific to certain features previously disclosed in some of the above applications. f

The primary object of the invention is the provision of a device having a single stylus capable of picking .up two separate records in the same track with a single track-follower, or stylus, and -to combine, or to separate the two records for reproduction.

A particular object is to provide two electricalpick-up devices in combination with a common stylus.

A further object is to provide two electrical pick-up devices for two records with a control connection means, whereby the two records, in the form of current may be varied in actual and relative intensity, and presented either separately at different times or simultaneously, or combined simultan eously.

' Various other objects and advantages of '1 Fig.2isa

the invention will be apparent'from the .fol

lowing description of one form of the invendrawings, in which Fig. 1 is a plan view of an electric phonograph table. detail front elevation of the electrical pick-up device showing a record in cross section.

Fig. 3 is a plan view of the device'in Fig. 2.

Fig.4 is an end view of the device coupled with a diagrammatic representation of elec-' tric connections.

In the drawings the numeral 8 indicates a phonographbase having a turntable 9. 10 indicates a spiral groove record having a vertical sound track 11 and a horizontal sound track 12 combined in the same groove. A groove-follower is provided such as a needle .13 mounted in the socket means 14 whichis carried on a block having the form of a cube 15. The phonograph 9 carrying the device has a swinging arm 16 with a lateral extension 17. From the lateral extension 17 a resilient or springy projection 18 extends parallel to the record and more; or less in the dii I 'rection of the tangents to the soun'd groove.

tion as it is shown 'in the .acconipanying The block 15 is carried by the member 18 so i that it is free to vibrate laterally and vertically. Above the block 15'is a microphone element 19'with' a ball contact 20 resting on the fiat top of the cube. The microphone 1s merely illustrative of many types of electrical devices sensitive to vibrations, and. maybe understood here to be of the carbon granule 1 type. One lateral face of the cube has a sim-.

ilarly contacting microphone element 21 and ball contact 22. Each vibration may thus be recorded independently of the other. The microphones are mounted on a rigid member 23 which is carried bythe extension 17. This.

type of device is represented generally in Fig. 1 by the numeral 24.

The device and the double record are particularly useful for reproducing phased versions of the same sounds, such as binaural efiects. Weir, in Patent Number 1,508,432 discloses a binaural phonograph system in which separate records are synchronized-and picked up by separate styli. In binaural sysa 45 tor.

terns a phase deviation of about .0( )023"secas 90. 'And. where two needles are employed" for Synchronized records, travelling about 80 inches per second relativc to the record, it is seen that there must. he a constant accurate.

,' adjustmnt of the 'two needles to--record, to reproduce and to maintain the efi'ect.- An

error of. .01 ofan inch in the required relagtive positions of the needles on two records would destroy the true efl'ect. The present".

invention eliminatesdelicate mechanism and all possibility. of mechamcal defects usmg two needles.

" The device may be employedwith earphones as disclosed by Weir to secure the 'binaural effects. 1 It may also be employed 'with separated loud type speakers as disclosed in the applicant s copending applications above named, or'in accordance with the disclosure of German Patent360,'7'19, showing another way of presenting binaural effacts. In each instance two receiving circuits arerequired, one from each side of the pick- 5 up device. .In-Fig. 1, electrical plugs and 26 are indicated for attachment of such I w I However, the invention is not limited to 1 the binaural systems, and it may be used with 30 any other-two records, especially intelligibly related ones. I Extra-binaurally related records of, the same sounds may be employed,

and the later base of one sound appears as i a reflection o the earlier, giving increased quality to the combination. 'Extra-binaural versions may be used 'to separate sources as disclosed in my copending a plication Ser.

No. 219,629, filed August 4, 1 27. As a-n'example of other intelligibly co -ordin ated eli:

.4 fects there is'cited a complete selection which may be divided into'two portions, for example a singer on one system 'and the accompaniment on theother, so that each may be played and controlled as desired by the audi- The present invention may also be em-v ployed in the phonographic field to record and reproduce dialogue, dual combat, and the Y ,like.- -For dialogue, two loud speakers r'eceiving difierentrecorded, yet intelligibly coordinated, conversations, may be placed at separate points andappear to converse with each other, all from one record. Games such as chess, may be reproduced with action by PIQVIdlHg participants with head phones through which each receives independent and intelligibly coordinated instructions how to act.

The two records may contain vibrations according to one or more other variables than sound, such as light or television "records which it is desired to coordinate with another record. i

In order to make thedevice flexible for onds may indicate anangular change as great-ivided. f

various applications other features are pro- In Fig. 4Jthe reproducer forthe two efl'ect record is shown as having its independent circuits 30 and 31, from the microphone elements 19 and 21 respectively, connectedinto a circuit control box 32. variableicontrols 33- and 34 are provided for each circuit'to vary the intensity of the tone in each circuit.

Terminals 35' and 36 may be connected by suitable mechanism (not shown) to permitoptional-connection to one or two reproducers. Theuse of one reproducer 37 is particularly advantageous, and is now found in man 7 phonographs. Both 'eifects maybe combined 89 in the one reproducer, oreacli may be repro-. duced indivi dually in two reproducers 37 and 3,8. A vocal effect on-one side and an instrumental efi'ect on the other may. be thus played separately or in combination, at, any tone 3 volume and at any ratio of tone volume when combined' Various modifications in the invention may be made within the skill of theart. The microphone elements may be condenser types 9 or carbon granule types, or diaphragms and magnetic coils, like-those shown in Weir, and 4 now in-extensive use.

The mounting means for the commonstylus may 'be difierently constructed, as shown in.

the prior art patents mentioned (Heck, Emer son, Waters) using microphonesrather than air cushions at the separately vibrating elements. I

These and other changes and modifications we are contemplated by the invention as it is expressed in the appended claims.

What I claim is: 1.A duplex sound record having a sound 7 track varying vertica'llyfor one sound record, and varying horizontally for another sound record intelligibly related to the first record, means having a single sound track follower for simultaneously reproducing said two rec- 'or'ds, two electric circuits associated with said means for carr ing current in conformity with each recor means to vary the intensity. of currentout of. proportion to the record, and means to reproduce sound from said two currents.

2. Means for-reproducing sound comprising two intelligibly related sound records, electric mean sv for pickin up sound from each record, a single electric sound producer for said records, means to vary the strength of sound reproduced from each record, and controllable means adapted to connect either one or bothof said picking up "means to said sound producer. 3; Avduplex sound recordfhaving vibrations recorded vertically therein and vibrations recorded horizontally therein, and electrical pick-up devices for each record having a common stylus. I r p I 4.-.,A duplex record having a track varying vertically for one record, and varying horizontally for another record intel 'gi ly related to the first record, an'electrical pick up system for each record, and means associated electrically with each system adapted to carry one stylus for the two records.

5. An electric pick-up device for recorded vibrations, com rising 1n combination a stylus-carrying bo y mounted for vibration ver tically and horizontally, having a vertlcal plane and a horizontal plane, and an electrically sensitive body responsive to vibrations restirig on each plane.

6. n electrical pick-up device for recorded vibrations comprising in combination means adapted'to be moved by a stylus in two right-angular directions, andtwo microphone elements associated with said means to record into corresponding variations of electric current.

8. An electric pick-up device for phonograph records comprising two electrical elements for varying current by mechanical vibrations, astylus carrier capable of vibrating in different directions for separately influencing said elements, means providing an electric circuit for each element, and current control means for each circuit.

. 9. An electric pick-up device comprising in combination a body having a stylus receptacle, mounting means for said'body permitting vibrational movement in right angular directions substantially axially of a stylus in said receptacle and substantially transversely thereto, and two electrical microphone elements sensitive to vibrations of said body arranged with respect thereto to vary an electric current in each in accordance with said vibrations.

10. A duplex wave form record having vibrations recorded vertically therein and vibrations recorded horizontally therein, and electrical pick-up devices for each record having a common stylus.

-11. A duplex wave form record having independent co-ordinated vibrations therein, one vertically and one horizontally, and electrical pick-up devices for each record having a common stylus.

12. Apparatus for tracing a wave form record in a groove comprising two independent electrical Wave responsive tracing devices having a common stylus for said groove movable horizontally for one device and vertically for the other device.

13. A reproducing apparatus for phonom hic sound records having vertical I and onzontal variations for difierent records of the same sound, comprising in combination, I meansfo'r carrying such a record, a reproducing unit positioned to reproduce vertical variations, and a reproducer positioned simultaneously to reproduce horizontal variations, and two sound producers for simultaneouslyvpresently sa1d two records bin- I 'aurally to a hunran being. y 14 A reproducin apparatus for phonographic sound recor s having asingle roove varying horizontally for one record an vary 7 ing vertically for another record, comprising incombmation, means for mounting a groove follower, means associated with said mounting means, one for lateral variations, and one for vertical variations, independent. means for use with sound emitting means to be associated with each vibratory means, and sound emitting means arranged to present said two records binaurally to a human being. i

15. In combinationa sound record havin a sound track varyin horizontally for soun primarily intended or one ear, and'varying independent vibratory vertically for a bina-urally related sound priniarily intended for the other ear, binaurally instantaneous effects being coincident along thelength of the track, means having a single sound track follower for separately reproducing the two records.

In testimony whereof I have hereunto affixed my signature.

. W. BARTLETT JONES.

h CERTIFICATE oF coRREcTwNemm No. 1,855,151. y April 19, .1932.

v V l w. BARTLETT JONES.

It is hereby certified that. errorappears in the printed specificationof the above nun bered patent requiring correction as follows: Page 3,line 74, claim 13, for "presently" read presenting; and that the said Letters Patent should be read with this correction therein that the same-may conform to the record of the case -in the Patent Office.

Signed and sealed this 12th day of July, A; D. 1932-.

M. J. Moore, (Seal) Acting Commissioner of Patents.

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