US1758559A

US1758559A - Sound recording and reproducing apparatus

Info

Publication number: US1758559A
Application number: US238584A
Authority: US
Inventors: Croll William Frederick
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-12-13
Filing date: 1927-12-08
Publication date: 1930-05-13
Anticipated expiration: 1947-05-13

Description

.. May 1351930.. v w CROLL Y 1,758,559

SOUND RECORDING ANU REPRODUGIDNGAPPARATUS Filed Dec. 8, 1927 4 Sheets-Sheet 1 Inventor.

May 13, 1930. w. F. CROLL ,5

- I SOUND RECORDING AND REPRODUCING APPARATUS Filed Dec. 8,4927. 4 Sheets-Sheet 2 Jfiventon. W1 lLizLm Fmderic'lwmll.

Attorn 42 W May 13, 1930.

w. F. cRpL-L- sounn- RECORDING ANRBEPRODUCING. APPARATUS Filed Dec. 8, .1927

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May 13, 1930. w. F. CROLL SOUND RECORDING AND REPRODUCING APPARATUS 4 Sheets-Sheet 4 I Filed Dec. 8, 1927 V FIGJU.

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I I lm/entan I William Wedertokfroll.

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Patented May 13, 1930.

masse- WILLIAM FREDERICK CROLL, OF LONDON, ENGLAND SOUND RECORDING AND REPRODUCING APPARATUS Application filed December 8, 1927, Serial No. 238,584, and in Great Britain December 13, 1926.

This invention relates to sound recording I and reproducing apparatus, such for example as gramophones, and provides an attachment adapted to be fitted to the driving spindle or other moving member of the apparatus to enable it to operate sound records produced on thread, wire, paper, ribbon or like material which is capable of being wound up and unwound over a supporting member and in contact with a stylus or like device in connection with a sound box.'

According to one form of this invention a frame or support adapted to be placed or fitthe reels being preferably mounted rotatably' ted upon a stationary portion of the apparatus carries a main spindle provided with means by which it may be attached to a driving member of the gramophone or like apparatus, and

apair of driven spindles on which reels can be fitted. to carry awinding record, the reel spindles being driven through pulleys or like gearing while the record is fed by separate gearing from one reel to the other. The reel spindles are preferably driven by a band passing over pulleys on the spindles and over a central driving pulley .on an intermediate shaft driven by the main spindle, the drive of these pulleys beingindependent of the drive of the record which passes over and around a separate roller on the intermediate shaft, or preferably over this roller and a second jockey roller which helps to retain the record in place and to give sufficient grip to effect its drive. The drive for the reelsis frictional,

0rd passes, and the speed of which roller has a definite relation to the motor speed. The gearing between the main spindle and the intermediate shaft is'preferably of bevel type.

The main support of the fitting comprises a light platform with a frame to carry the reel spindles and provided at the centre with a bearingthrough which the driving spindle extends, the lower end of this spindle being notched'or otherwise formed to'engage, for example, .the usual driving spindle of the gramophone, phonograph or dictating machine, while the platform is adapted to be clamped on the casing of the sound reproducing apparatus under consideration. The fitting is also provided with a rigid support or backing for the record at the point at which I the sound reproducing device or stylus bears upon the record as this travels past the sound box. As applied to an ordinary gramophone all that would be necessary to utilize the gramophone for the recording or reproduction of sound by the thread, Wire, ribbon or like wound record would be tov support the adapter above the turntable and connect it to the spindle. Or the turntable might be removed if found preferable.

By suitable adaptation of the more records could be simultaneously used to combine, for-example, two or more separately recorded voices or instruments in a musical or dramatic performance.

The bevelled gearing is so contrived that the drive may be reversed so that the motor of the gramophone may also be used for wind ing back the record after use.

In a modification of this apparatus more esspecially for thread records one of the bobbins may be mounted directly on the gramophone spindle and the other bobbin carried by an arm connected by a clamp to the gramophone casing, the said arm also carrying the support over which the thread record passes, the latter being passed between guide pins on the arm. i

In a further modification a friction wheel may be mounted on the gramophone spindle adapted to take into the space between the fitting two or flanges of one of the bobbins, and drive the latter by friction against the record thread wound thereon. The two bobbins are mounted one on each end of acentrally pivoted beam carrying the support over which the thread record passes. The beam is pivoted on an arm adapted to be clamped to the gramophone casing wall'or on a plate capable of adcontact while the other is maintained out of contact by means of a cam. The friction gwheel is mounted on a spindle on which are two running wheels, either of which may be keyed to the spindle to revolve it. These running wheels contact with the face of the gramophone turntable, the one being on one side of the axis and the other on the other side of the axis. One of these running wheels is intended to be used for rewinding and is further than the other from the axis of the turntable.

. Reference being made to the accompany ing drawings Fig. 1 is a side elevation and Fig. 2 a part elevation of the first described form of this invention. Fig. 3 is a plan and" Fig. 4 is a side elevation of a modification in which one of the bobbins is mounted on the gramophone spindle. Fig. 5 is a plan and Fig. 6 a sideelevation of another modification in which the bobbins are mounted on a rock ing beam so that either of them may be driven from a friction wheel mounted on the gramophone spindle. I

Fig. 7 is a plan, Fig. 8 a side elevation and Fig. 9 a front elevation of a modification in which the turntable of the gramophone is utilized for driving the bobbins through friction' gearing. Fig. 10 is a detail View of part thereof.

Fig. 11 is a plan view of such an apparatus in which arrangement is made for simultane- I ous operation of two record threads or strips,

Referring toFi s. 1 and 2 a indicates the gramophone spin 1e and b the gramophone casing, A platform a placed across the easing is clamped thereon by any convenient form of clamps such as ii (I. Mounted on the platform 0 is a frame 6 of any convenient shape having bearings as at e e for a spindle 7 having means of attachment conventionally shown at g for connection to the spindle a. A sleeve h keyed on the spindle f carries two bevelled pinions 21 and a collar j for a striking gear 9' Either of the pinions it may be caused to mesh with the bevelled wheell on a shaft 1 carrying a belt pulley Z and athread or strip feed wheel 1. The belt pulley Z is connected by belt m with two belt pulleys-m m on shafts m m respectively having fixed on them disks m frictionally driving disks m on sleeves m on which the bobbins a 12.

mediate shaft 1, the receiving bobbin being caused to maintain a taut thread between it and the feed wheel Z and the delivery bobbin by reason of its rotation in the opposite direction to that. of its spindle, ensuring a tensioned thread between it and the feed wheel l An arm 0 on the frame 0 carries the sound box r with its stylus 7 bearing on the record thread where it passes over the support 12. The sound box throat r may be connected by a flexible tube to the gramophone horn (not shown).

Referring to Figs. 3 and 4, the clamp d has a lug d on which is secured as by set screws d a slotted plated on which is a pin (1 to receive one of the bobbins n The support 12 is also carried by the plate (1, the record thread being guided to and from the support 1) by two pairs of pins 10" p. The other bobbin n is mounted directly on the gramophone spindle a. The screw d in the clamp d serves to adjust the height of the device in order that it may be used with gramophones having different heights of casing.

Referring to Figs. 5 and 6, a clamp similar to that in Figs. 3 and 4 carries a plate d on which is pivoted the rocking arm 8 having near each end a pin (1 d for reception of the bobbins n M. The arm 8 carries also the support for the record thread and uide pins therefor as in Figs. 3 and 4. Ont e spindle a of the gramophone is mounted a friction wheel t. The arm sis drawn by a spring t so that'one of the bobbins n* or n is held in contact with the wheel t. The spring 23 is detachably hooked to the arm and may be connected to either of two eyes t 17 according to the position of the arm 8. Friction pads I u u are placed under the bobbins.

Referring to Figs. 7 to 10 '0 represents part of the turntable of a gramophone. 'w is a frame supported in any suitable manner from the gramophone casing and having a downwardly projecting leg 20 with 'a bear-' ing to for a hollow shaft 10 on which two running wheels '10 w are free to revolve. The shaft '10 is slotted in the neighbourhood of the wheels to 'w and keys carried by a pin to within the shaft w project through the slots and are adapted to engage in key ways in either of the wheels w to according to the position ofthe pin w so as to key tion wheel w adapted to enter between the I flanges of either of the bobbins n n and press against the windings of record thread thereon. The bobbins 11. are carried by bell crank levers m pivoted at 00 a2 respectively on the frame 10. Springs ,aa w tend to draw the bell crank levers m? 90 so as to press the bobbins against the friction wheel A cam 3 pivoted on the frame w and operated by a knurled knob g isadapted to bear against the one or other bell crank lever m m and hold the corresponding bobbin away from the friction wheel w. The support for the thread is indicated at 7 It will be understood that the stylus of the reproducer is adapted to bear on the thread as it passes over the thread support in any of the Figures 3 to 9, in the same manner as shown in Figs. 1 and2,whether the sound reproducer-beof the type shown in Figs. 1 and 2 or of the type shown inFig. 9.

In the modification illustrated in Fig. 11, the reels (equivalent ton n of Figs. 1 and 2) for giving out and receiving the record respectively are each duplicated as shown at n n and the record driving wheel (equivalent to Z of Figs. 1 and 2) is also duplicated as at 12 There are two sound reproducers as shown at W. The remainder of thisappa ratus is the same as has been described with respect to Figs. 1 and 2 and has therefore been omitted'from this figure.

What I claim as my invention and desire to secure by Letters Patent of the United States is 1. In sound reproducing'or recording apparatus the combination of a sound box and v stylus, means for feeding a record strip in contact with said stylus, a holder for said sound box and feeding means, a device for engaging said feeding means with a rotating part of an instrument of. the gramophone type, whereby said feeding means are actuated, and means for attaching said holder to said instrument, with said actuating device;

in engagement with said rotating part.

2. In sound reproducing or recording apparatus the combination of asound-box and stylus, means for feeding a record strip .in

theform of a thread in contact with said stylus, aholder for said sound box and feeding means, a device for engaging said feed ing means with a rotating part of an instru:

ment ofthe gramophone type, whereby said feeding means are actuated, and means for attaching said holder to said instrument, with said actuating device in engagement 'with said rotating part.

ated, and means for attaching said holder to said instrument, with said actuating device in engagement with said rotating part.

4. In sound reproducing or recording apparatus the combination of a sound box and stylus, means for feeding a record strip in the form of a thread in either direction at will,.a holder for said sound box and feeding cmeans, a device for engaging said feeding means with a rotating part of an instrument of the gramopho-ne type, whereby said feeding means are actuated, and means for attaching said holder to said instrument, with said actuating device in engagement with said rotating part.

5. In sound reproducing or recording apparatus the combination of a sound box and stylus, means. for feeding a record strip in .contact with said stylus, a holder for said sound box and feeding means, a device for engaging said feeding means with a rotating spindle of an instrument of the gramophone stylus, means for feedingia record stripin -the form of a thread in contactwith said stylus, a holder for said'sound box and feed-. ing means, a device for engaging said feeding means with a rotating spindle of an instrument of the gramaphone type, whereby said feeding means are actuated, and means for attaching said holder to said instrument, with said actuating 'device'in engagement with said spindle. t

7. In sound reproducing or recording apparatus the combination of a sound box and stylus, means for feeding a record strip in v,

contact with said stylus, a holder for said sound box and feeding means, adevice for engaging said feeding means with a rotating turntable of an instrument of the gramaphone type, whereby said feeding means are actuated, and means-for attaching said-holder to said instrument, with said actuating device in 5 engagement with said turntable.

8. In sound reproducing or recording apparatus the combination of a sound box and stylus, means for feeding a record strip in either direction at will, a holder for said sound box and feeding means, a device for engaging 1' said feeding means with a rotating turntable" of an instrument of the gramophone type,

whereby said feeding means are actuated, and means for attaching said holder to said iiistrurnent, with said actuating device in engagement with said turntable.

9. In sound reproducing or recording ap paratus the combination of a sound box and stylus, a pair of bobbins for a record strip, means for rotating said bobbins for feeding said record strip in contact with said stylus,

a holder for said sound box, bobbins and feeding means, a device for engaging said feeding means with a rotating part of an instrument of the gramophone type, whereby said feeding means are actuated to rotate said bob bins,-means for attaching said holder tosaid instrument, with said actuating device in engagement with said rotating part, and means automatically regulating the relative speeds of the two bobbins as the record strip is fed from the full one .to the empty one,

10. In sound reproducin or recording apparatus the combination i a sound box and stylus, a pair of bobbins for a record strip,

means for rotating said bobbins in either diin engagement with said rotating part, and means automatically regulating the relative speeds of the two bobbins as the record strip 1 is fed from the full one to the empty one.

11. In sound reproducing or recording apparatus the'combination of a sound box and stylus, a pair of bobbins for a record strip, means for rotating either of said bobbins in either direction at will for feeding said record strip, a holder for said sound box, bobbins and feeding means, a device for engagsaid instrument, with said actuatingdevice in engagement with said turntable. 1

12. In sound reproducing or recording apparatus the combination of a sound box and stylus, a pair of bobbins for a record strip,

'm'eans'for rotating either of said bobbins in either direction at will for feeding said record strip, said means consistin of running wheels adapted to contact with a rotating turntable of an instrument of the gramophone type, a holder for said sound box, bobbins and feeding means and means for attaching said holder to said instrument, with said running Wheels 1n contact with said turntable.

with said actuating device in engagement with said rotating part.

In witness whereof I have signed this specification.

WILLIAM FREDERICK GROLL.

ing said feeding means with a rotating turn- I table of an instrument of the gramophone type, whereby said feeding means are actuated and means for attaching'said holder to 13. In sound reproducing or recoi ding apparatus the combination of a"plurality of sound boxes and stylus, means for feeding a plurality of record strips in contact with said stylus, a holder for said sound boxes and feedng means, adevlce for engaglng said feedmg means with a rotating part of an instru- -ment of the gramophone type, whereby said feeding means are actuated, and means for attachlng sald holder to said instrument,