US1322889A - Sound-reproducing machine - Google Patents

Description

C. H. FLECK.

SOUND REPRODUCING MACHINE.

APPLICATION FILED MAY l?. i915. 1,322,889. Patented Nov. 25, 1919.

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APPLICATION FILED MAY 11| l9l5.

'Patented Nov. 25, 1919.

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ATTORNEYS WITNESSES cating in dotted lines both the circuit UNITED STATES PATENT OFFICE.

CHARLES I-I. FLECK, OF PHILADELPHIA, PENNSYLVANIA.

SOUND-REPRODUCING MACHINE.

Application filed May 17, 1915.

To all whom it may concern: n

Be it known that I, CHARLES H. FLEcK, a citizen of the United States, residing in the city of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented a new and useful Sound-Reproducing Machine, of which the following is a specication.

My invention consists of imp-rovements in the class of electrically-operated sound-reproducing machines;y and it consists in the peculiar and advantageous means, hereinafter described and claimed, for automatically stopping the machine when the playing of a record is completed.

For the purpose of illustrating my invention I have shown in the accompanying drawings a certain type and embodiment of it which is at present preferred by me because in practice it has given satisfactory and reliable results.

It is to be understood, however, that the various instrumentalities in which my invention is embodied can be variously arranged and organized and that my invention is not therefore limited as to the precise arrangement and organization of these instrumen-` talities typified in the constructions depicted in the accompanying drawings and herein described. v

In the drawings f Figure 1 represents a plan, and Fig. 2 a fragmentary side elevation, of a sound-reproducing machine embodying my invention.

Fig. 3 represents a transverse, sectional, side elevation through the machine, indibreaker and the electric motor, and showing the tone-arm and the stop arm in perspective.

Fig. 4 represents in sectionfthe outer portion of the tone-arm, illustrating particularly the current closing contact collar.

Fig. 5 is a similar view of that portion of the stop arm to which the current closing contact pin is applied.

`Fig. 6 represents a sectional detail of the base bearing of the motor shaft.

Fig. 7 Vrepresents a side elevation of the carrying plate of the circuit breaker and Specncation of Letters Patent.

Patented Nov. 25, 1919.

Serial No. 28,539.

the adjuncts thereof, removed from the casing of the machine.

Similar characters of reference indicate corresponding parts.

Referring to the drawings,

1 designates the cabinet or casing of a typical sound-reproducing machine, upon which is mounted for the usual swinging movement and in the usual way the tonearm 2, the sound boX or reproducer of which is designated 3 and the stylus 4.

5 designates the record table, 6 the record andr6X the grooves therein. 7 is the table spindle mounted in the spindle bearings 8 and 9 carried by a spindle frame 10 depending from the under surface of the top of the cabinet.

11 is a bracket depending from the frame 10 and serving to carry the step 12 for the table spindle, which is cupped to rest upon a ball 14, which, in turn bears on the step. 13 is an adjusting lock nut for the step 12.

15 designates a band wheel fixed upon the table spindle. 16 is an electric motor of any preferred type conveniently erected upon the standard 17 within the cabinet.

18 designates the motor shaft which rests in a base bearing 19, bolted to which by bolts 22 is a bearing plate 20 upon which rests a ball 21 upon which the motor shaft rests.

23 designates a band pulley having radial band lugs or studs 25 to grip the band or belt 24 upon the band pulley 23 and thereby effect the positive rotation of the table spindle and record disk.

26 is what I term a stop arm preferably slightly curved at its exterior end, and mounted upon the top of the cabinet in proximity to the tone-arm by a standard 27. The arm has a swinging but frictionally controlled movement in a horizontal plane with reference to its standard and to the tonearm, and at its outer extremity carries a depending pointer 26X which, in the starting of the machine hereinafter described, is brought to rest over the end of the innermost groove of the record.

The stop arm is preferably hollow and intermediate of its length is provided with a circuit closing contact pin 28, conveniently screwed through a pin lug 29 fastened by means of the screws 30 to the arm and insulated therefrom by a plate 31.

32 is the terminal of the conductor 33 which preferably passes through the stop arm 26 and forms part of the circuit which, for clearness, I herein term the stoparm circuit.

34 designates a circuit closing contact collar upon the tone-arm near its outer extremity. This collar rests upon an insulating sleeve 35 and upon it rests the outer terminal 36 of the stop-arm circuit, or that which in series includes the stopping and starting connections or circuit breaker proper, the components and adjuncts of which are particularly illustrated in Fig. 7.

I prefer to employ the circuit breaking device shown particularly in Fig. 7 in which 38 designates acarrying plate of insulating material adapted to beconnected conveniently with the inner face of one of the sides of the cabinet. Y

39 is the spool of an induction coilor typical electro-magnet, shown as horizontally disposed and carried by a metallic frame 39X fastened to the carrying plate 38. 40 is the core of the coil, to the outer extremity of which core is connected a lead designated A, being a part of the circuit designated 37 X, which leads from the battery 59 or other source of current supply.

Vhen the armature is not in contact with the core 40, it will be held in its then position by the action of the armature spring 44. fast to the frame 39x and to the upper end of the armature, which holds it against an armature stop 45.

The lower end of the armature is provided with Ya catch 42 adapted to engage the catch point 49 0f a metallic lever 46 having a counterweight 48 and fulcrumed on a metallic pivot 47 conveniently supported by a sup-,

plemental plate 50 attached to the carrying plate 38.

From the pivot of the lever 46 the lead B, being a part of the circuit of the induction coil 39, extends so as to be also a part of the circuit 37 leading to the contact-closing collar 34 of the tone arm.

51 designates a double-pointed trip located against the inner face of the supplemental plate 50, and pivoted upon the trip shaft extending through an appropriate bearing in the plate 50 and the side of the cabinet and upon the exterior thereof provided with a turning device conveniently in the form of a thumb knob 53.

54 designates a coiled spring which I term a trip-spring, the free end 55 of which, passing through the guide clip 58, extends beneath the trip 51, while the other end which I term the locked end 56, is fastened to the plate 38 by a locking screw 57.

Obviously, in the position of parts represented in Fig. 7 the spring will retain the trip in level contact with it, while when the trip is partly rotated by its knob to raise the counterweighted lever 46 the free end of the spring will be depressed.

Havin now described the mechanical devices Whlch my invention comprehends, thc two circuits which I use will in a consideration of the operation of the said devices be easily understood.

Assume that the tone-arm and the pivoted stop arm have each been first thrown clear of the record table so as to permit of the placing upon it of the record to be played, the stop arm is then swung in until its pointer 26x comes to rest over the inner end of the groove of the record.

Starting from the battery 59, the circuit leads through the line 37x and the lead A and core 40, through the frame 39", armature 41, catch 42, lever 46, fulcrum 47 and lead B of the induction coil, Fig. 3, through the upper line 33X, through the motor 16, and through the lower line 33x back to the battery.

The current in both instances referred to passes through the coil B.

Although I have not considered it necessary to add to the drawings a separate figure to show it, it will be understood that before the knob 53 is turned the weighted arm of the lever 46 is down and both the motor and the stop arm circuits open.

After the knobv has been turned and the weighted arm of the lever 46 lifted the armature 41 will be in the position shown in Fig.-

7 and out of contact with the core 40, but the motor circuit will be closed, the current be ilowing through the motor and the table be rotatin After t e table and record have, as a1- ready described been thus set in motionend the stylus of the tone-arm introduced into the beginning of the oove of the record, the stylus will traverse .Elie groove until, inthe well known operation of a machine v0f the type under consideration, the tone-arm will have been swung vinward toward the center of the disk, and in my constructionl will have been thrown sufficiently far inward to bring its circuit closing contact collar 34 into contact with the circuit closing contact pin 28 of the stop arm.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enum rated as desirable, and while I have in t e present instance shown and described a preferred embodiment of it, which has in practice been found to give satisfactory andreliable results, it is tobe understood that the embodiment issusceptible of modiiicationin various particulars without departing from the spirit or scope of the invention or sacricing any of its advantages.

I-Iaving thus described my invention, what I claim as new and desire to secure by Letters Patent, is

A motor, circuit-completing means actuated by the motor, a source of electric energy, an electric circuit, circuit breaking means associated With said elements and including a coil through which the said circuit is completed, and a second and normally incomplete electric circuit associated with the source of energy and the circuit completing means and including the said coil of the circuit breaking means; the said circuit breaking means also including means for interrupting the first-named circuit and controlled by the completion of the secondnamed circuit.

In testimony that I claim the foregoing 20 as my invention I have hereunto signed my name this 7th day of April, 1915.

CHARLES I-I. FLECK. In the presence of J. BoNsALL TAYLOR, JOHN A. WIEDERSHEIM.

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