US1413074A - Phonograph - Google Patents

Description

E. J. TOML INSON.

PHONOGRAPH.

APPLICATION EILED JULY 5.1913.

1,413,074. Patented Apr. 18, 1922.

3 SHEETS-SHEET l.

11v l/ENTOR EDA/FED J TUML/NEUN ATTORNE Y E. J. TOMLINSON.

PHONOGRAPH.

APPLICATION man JUL-Y5. 1919.

1,413,074. Patented 18, 1922.

3 S ETS-SHEET 2.

INVENTOR L I FDMIHRD .JI TIJML/NSDA/ BY 7 ZM- 6' f ATTO RNEY un rso srrssrarsar FICE.

EDWARD T i EAsr ORANGE, New JERSEY, assreiron TO SPLITDORF ELECTRIGAL COMPANY, or NEWARK, new JERSEY.

PHONOGRAPH.

Application, filed July 5, 1919.

To all whom it may concern Be it known that I, EDWARD J; ToMLTNsoN, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Phonographs, of which the following is a specification.

This invention relates to electrically operated phonographs and as illustrated is particularly adapted for playing a record in the form of a plate or fiat disk.

It is the principal object of my invention to provide a phonograph in which the sound record body is carried on a support electrically driven in such a manner as to insure a constant speed and quietness of operation.

In carrying out the principal object of my invention, I aim to secure a motor mechanism that is simple in construction and highly efiicient in its operation.

It is another object of my invention to provide a starting and stop mechanism for the rotatingsupport which is simple and positive in its operation.

Another ob'ect of my invention is to in,- corporate in the stopping mechanism means for stopping the turn-table shortly after the playing of the record has been completed.

In my application, Serial. No. 288,386; filed April 7. 1919, and my application, Serial No. 301.101, filed Nlay 31,. 1919,.1 have shown and described two forms of electric motors suitable for phonograph purposes.- My present invention is directed to a motor suitable for similar work but in which the operating mechanism is so arranged asto occupy a small amount of space along the axis of rotation and the construction, to be later described is of amotor which I term as of the pancake ype Other and further objects of my invention willbe apparent to one skilled in thisart, aftera study of the specification and draw in'g's annexed thereto. wherein t Figure 1 is a bottom view of the sound record support body.

Figure 2 is a 560131011011 the line 2-2 of Figure 1.

Figure 3 is a plan vlew of'a phonograph.

with the sound record support body shown in Fi ure 1 removed.

Fig-ureais a bottom view of Figure 3,-

Specification of Letters Patent.

Patented Apr. 18, 1922.

Serial No. 308,840.

through preferably sound deadening buffers 57. Support ring 2 carries an inductor ring thaving a plurality of poles 5 on which windings 6 are mounted. The central part ofthe ring 2 has a hub 7 within which is secured a bearing for a driving shaft. The end of the hub is adapted toiit a recess 8 within the collar 9 carried on the sound record support body 10. The part 9 has teeth 11 fora purposehereinafter pointed out. The driving shaft (not shown) is' adapted to be fastened to the member in any suitable manner. The member 1O has an inductor ring 12 fastened thereto in any suitable manner, such as by screws 13. Inductorring 12 has a plurality of pole pieces 14L which, when the member 10 is in opera tive position, are in magnetic cooperation with the pole pieces 5.

Carried on two of the arms 15 and 16 of the member 2 is a sliding bar 17 having slots 18 and 19 through which shoulder screws 20 pass. Fulcrumed at 21 on the frame is an operating handle 22, the inner end of which has a slot'23 adapted to engage a pin 2 that is fastened to the bar 17. Bar 17 also carries a clip 25 on which is pivoted a pawl 26 that is adapted to engage the teeth 11. Bar 17 also carries a block 27 preferably of insulating material which block acts on aspring 28 to move'acircuit breaker contact 29 to a position where it may or may not be acted on by a c'ooperat;

ingv contact 30, in a manner hereinpointedout; The bar 17 also carries a spring 31 adapted .to contact with a screw 32 carried on the frame of a relay 33. Relay 38 has after pointed out. Lever 22icarries a clip 37 to which is fastened a friction block 38.

The frame 1. also supports a governing device 39, similar to that shown and described in my co-pending application, Serial No. 238,385, filed April 7, 1919, and since this governor .mechanism forms no part of my present invention, it will. not be described further herein. On one arm of the ring 2 a condenser 40 is mounted while a double resistance coil. 41 is carried on the frame 1.

Carried on the hub 7 is'an adjustable circuit breaker plate 42. Plate 42 is preferably made'of some good insulating material and has mounted thereon a member carrying a stationary contact 30 and a movable member '43 carrying contact 29. The circuit breaker mechanism is similar in many respects to that shown and descrlbed 1n my copending application Serial No. 301,101, filed May 31,v

1919, and will not be described at length herein except that the cam memberon the shaft for operating the movable member 43 is adapted to open and close the circuit through the coils -6 when the pole pieces 14 are in proper relation to pole pieces 5 whereby all the coils 6 function to simultaneously act on the pole pieces 14 to produce rotation of the soundrecord support body.

In order that the motor may be stopped directly after the record has been played, I

' provide automatic stopping mechanism, part of which has already been described and the balance of whichis carried on the tone arm 44, The part carried by the tone arm consists of a ring 45 fastened to the tone arm in any suitable manner. To the ring 45 is attached a member 46 and fastened to the member 46 is a finger 47 same being connected to the member 46 by means of a sprin r finger 47 is adapted toma'ke contact with the central post 51 '(see Figure 7 which holds thefsound record support body 10 on the driving shaft, 'andwhich together with the tone arm comprises a portion of the circuit for the automatic stopping mechanism. Considering now the operation of my phonograph motor, it will be understood that normally the parts are in the position shown in Figure 4, wherein the lever 22 is held in the non-running position by, spring 53 in which position; the friction member 38 is in engagement with the'circular member 54 car riedby themembe'r 10. When the lever 22 is in the position shown in Figure 4, it will 'ment with-the contact 29 thereby holding 3 open the circuit through'the coils 6 thus utilizing the circuitbreaker as a switch. On

o5 moving th'e' lever 22 to the position shown in be noticed that the end of member 28 engages theend of spring 43 through the me dium' of block 27t-hereby moving the member 43s that the contact 30 is out of engagewa'sher 48,, screw 49 and nut 50, where by a friction joint is obtained. The

Figure 5, the block 27 is carriedjto aposition whereby the end of spring 28 is withdrawn from engagen'ient with the spring 43 allowing the contacts 29 and 30 to come into association one with the other whereby the spring 43 may be acted on by the cam to open and close the circuit through the coils 6 for applying current impulses to the motor at the proper time. As the block 27 reaches the fully operated position the finger 36 drops behind the notch 35 carried on the ll'lOViLblG armature 34 of relay 33". This holds the bar 17 in the position sho wnin Figure 5, at the'same time the contact is closed between the spring 31 and screw 32 which are used to open and close the circuit instead of V at the point where the finger 36 engages the spring having notch 35 as the breaking of the circuit at this latter place may burnthe spring having notch 35 or the finger 36 and roughen them to such an extent as to interfere with their sliding operation, as it will be understood that a manual pull at theend of the lever 22 will cause the finger 36 to come out of engagement with the notch 35.

Operation of the lever 22 as above described also operates the pawl 26 so that the finger 55 formed thereon will engage the ratchet teeth 11 to give the sound record support body a starting impulse at the same time the brake block 38 is removed from engagement with the circular member 54. Beforeopcrating the lever 22 for starting the motor, as above described, it will be understood that the record disk has been. placed, on the sound record support body 10 and the tone arm- 44' moved over so that it is seen that thefinger 47 will engage with post 51 which is after the needle carried by the tone arnrhas fin-.' ishcd playing. the recordq The tone arm is then carried to the starting position and the.

the windings '6 is open and brake applied 7 to the sound record support body in a manner previously described.

Referring to the diagrammatic 1 wiring shown in Figure 7. it'isseen that the'circuit breaker has acondenser 40 and resistancevtl wired in shunt therewith and a resistance 52 p in shunt with the governor39. The governor 39 functions to control the speed of'the phonograph motor which speed may be adjusted by operation of the button 56. V It will be understood that in a device of this character numerous changes'and altera tions may be made in the construction of the various parts Without departing from the spirit of my invention and the scope of the a IpIended claims.

aving thus described my invention, What I claim is y 1. In a phonograph in combination With a rotatable sound record support and electromagnetic motor means therefor, of an intermittently operated circuitvbreaker for said motor means comprising a fixed member and a movable member, and a controlling memher for said circuit breaker operable upon movement in one direction to engage the movable member to maintain the contact open, and upon movementin the opposite direction to release said movable'member, and electromagnetically releasable means latching said controlling member in said member releasing position.

2. In a phonograph,in combination With a rotatable sound record support of electromagnetic driving means therefor, a'circuit breaker in the circuit of the electromagnetic driving means intermittently operated upon rotation of the support, and a controller under the control of a latch operative to simultaneously apply a braking force to the support and to open the circuit breaker upon release from said latch.

3. In a phonograph, a rotatable sound record support, and electromagnetic driving means therefor, of an intermittently operated a maintain the circuit breaker open in one d1- rection and to permit the circuit breaker to close in the opposite direction, means tending normally to maintain the bar in position to maintain the circuit breaker open, and electromagnetically releasable latching means, the circuit of which is controlled by said bar, for maintaining the bar in the other position.

4. In a phonograph, a rotatable sound record support, and electromagnetic driving means therefor, of an intermittently operated circuit breaker for said drivlng means operated upon rotation of the support, a

controlling bar slidable longitudinally to.

maintain the circuit breaker open in one direction and to permit the circuit breaker to close in the opposite direction, a member on the bar to impart movement to the support upon movement of the bar in said opposite direction, means tending normally to maintain the bar in position to maintain the circuit breaker open, and electromagnetically releasablev latching means, the circuit of Which is controlled by said bar, for maintaining the bar in the other position.

In Witness whereof, I affix my signature.

EDWARD J. TOMLINSON.

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