US899256A

US899256A - Sound-box for talking-machines.

Info

Publication number: US899256A
Application number: US38902907A
Authority: US
Inventors: Edwin H Mobley
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-08-17
Filing date: 1907-08-17
Publication date: 1908-09-22
Anticipated expiration: 1925-09-22

Description

E. H. MOBLEY. SOUND BOX FOR TALKING MACHINES.

APPLICATION FILED AUG. 17, 1907.

899,256 Patented Sept. 22, 1908.

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, snar EDWIN H. MOBL EY, OF HlLLSIDE. PENNSYLVANIA.

SOUND-BOX FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented Sept. 22, 1908.

Application filedl August 17, 1907. Serial No. 389.029.

T 0 all whom it may concern." Be it known that I, EDWIN H. MORLEY, a citizen of the United States, residing in Hillside, Montgomery county, Pennsylvania, have invented certain Improvements in Sound-Boxes for Talking-Machines, of which the following is a specification.

My invention relates to that class of sound boxes which are employed in connection with disk records, one object of my invention being to facilitate and cheapen the construction of the stylus lever; another object being to provide for the ready application to or removal from the stylus lever of the stylus or needle which engages with the record, and

a still further object being to so pivot said stylus lever that an extremely sensitive action of the same will be insured. These objects I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, in which Figure 1 is a vertical longitudinal section of a sound box for talking machines constructed in accordance with my present invention; Fig. 2 is a transverse section on the line a/-a, Fig. 1; Fig. 3 is a transverse section on the line 5-6, Fig. 1; Fi 4 is a bottom View of part of the stylus lever, partly in section, on the line cc, Fig. 3; Fig. 5 is a view of the blank from which the stylus lever is made; Figs. 6 and 7 are views illustrating modified forms of stylus lever; Fig. 8 is a view of the blank from which the stylus lever shown in Fi Fig. 9 is a view of the b ank from which the stylus lever shown in Fig. .7 is made.

Referring in the first instance to Fig. 1 of the drawing, 1 represents the cup-like casing of the sound box to which the diaphragm 2 is secured in any suitable manner, a screw cap 3 in the present'instance serving to-confine the outer portion of the diaphragm against a suitably located seat on the casing.

Secured to one side of the casing 1 is a block 4 provided with laterally separated caps 5, and between these caps is disposed the stylus lever 6, which bears at its inner end upon the central portion of the dia phragm 2 and is so constructed as to carry the needle or stylus 7 which engages with thegroove of the record in such manner that it will'be vibrated in the directions indicated by the double arrow in Fig. 1, said vibrations being therefore transmitted through the medium of the lever to the dia hragm 2.

The stylus lever is pivote to the block 4 6 is produced, and

by means of outwardly extending,

ins 9 projecting from V the underside of the ever, as shown in Fig. 2, the pointed ends of these pins being seated ,in conical recesses formed in the undersides maintained in contact with said cap plates by means of a spring 10 contained in the recess 11 of said block 4 and disposed in advance of the pivot pins 9, said spring terminating at .the top in an upwardly extending and axially disposed pin 12 which enters a recess in the underside of the sytlus lever, as shown in Fig. 1.

The head of the stylus lever is split vertically, as shown in Figs. 1 and 2, and each member 13 of the split head has formed in it a semi-circular recess 14, these recesses combining to form a socket for the reception of the stylus 7, which is so proportioned in respect to the recesses 14 that, when it is inserted in the socket formed by the latter it tends to spring apart the members 13 of the split head of the lever, and is therefore resaid members upon it.

carries a pin 15, which passes freely through an opening in the opposite member of the head, whereby inward pressure upon these pins will serve to effect the spreading apart of the members 13 of the head, and will thus and the insertion of a fresh one, the release of the pins from pressure permitting the members of the lever head to againspring towards each other and clamp the stylus between them. 1

While the stylus lever may, if desired, be cast with a solid head in which the various openings and slots can be formed byboring, drilling, sawing,. 'n1illing, or the like, I prefer to facilitate and cheapen the construction of the stylus lever by first forging afblank of the character shown in Fig. 5, this blank comprising a stem 16, with enlarged head 17, having oppositely projecting pins 19, o'pposite longitudinal grooves 20, a central longitudinal incision 21, and

openings

22 and 23 of the longitudinal center, whereby, when the expanded head of said forging is folded or bent upon a central longitudinal line and the pins 19 bent outward and upward, said pins will constitute the pivot pins 9 of the lever, the grooves 20 will form the socket of the cap plates 5 of the block 4, and being,

tained in position by the frictional hold-of Each member of the split head of the leverpermit of the withdrawal of a 'worn stylus and adepression or pocket/ijon each side the desired elasticity of the same in order that they may retain the stylus by gripping it between them. 7

Certa n features of my invention can, however, be embodied in stylus levers differing inv a number of respects from that which I have just shown and described, one of such stylus levers being shown in Fig. i":- and the blank from which it is made being shown in Fig. 8. in this blank the head 17 is at one side of the stem 16 and is bent on the line (C, so as to bring the grooves 20, and openings 2-2 and 23 into. proper relation to one another, the pins 19 projecting laterally, as shown in Fig. 8, so that they can engage suitable bearings in a fixed member of the sound box casing.

I This lover may, if desired, have an incision at the fold line :0, as in the case of the lever shown in 1. Still another form of stylus lever embodying some of the features of my invention is shown in l 1g. 7, the blank from i which this lever is made being shown in Fig.

in this case the stem 16* of the blank has a plain rectangular head 1?, which, when folded upon a central longitifdi'nal line and laterally compressed forms a substantially solid head for the lever, as shown in Fig. 6, which head can be'recessed on opposite sides for the reception of the pointed pivot pins 25, bored longitudinally for re ceiving the stylus 7, and drilled and threaded for the reception of a set screw 26, whereby the stylus is confined to the lever, inasmuch as the latter lacks the elasticity in its opposite members necessary to the retention of the stylus by a frictional grip of the members of the lever upon it.

The varirms modifications which I have illustrated and described, are suggestive of some of the different lines of development along which my invention may be carried, and will. be sullicient to indicate, to those skilled in the art, some of the variations of constructive detail within the scope of my invention.

1. A sound box having a diaphragm, a stylus le er, a bearing block therefor, upturned pins at the bottom of the stylus lever adapted to inverted bearings on the block, and a sing central spring for retaining said pins in contact w th said bearings. I

it. sound box stylus lever having a head with opposed elastic members, between which a stylus can be confined by their frictional grip upon it, and means engaging one of said n'iembcrs and passing freely through the other for separating said opposed members of the lever to release the stylus from the grip of the same. i

3. A sound box stylus lever having a head with opposed elastic members between which a stylus can be gripped, and pins, each carried by one of said members and projecting through and beyond the other member, one in one direction and the other in the opposite direction, whereby pressure upon the pins will effect the separation of said elastic members.

4. A sound box stylus lever comprising a stem and an enlarged head, the latter being folded on'a longitudinal line disposed centrally between opposite symmetrical portions of the head. i

5. A sound box stylus lever comprising a stem and an enlarged head, the latter being folded on a lon itudinal line and having an incision, on the line of fold.

6. A sound box stylus lever comprising a stem and an enlarged head, the latter being folded on a longitudinal line, and havin on opposite sides of said longitudinal line, grooves which, when the head is folded, cooperate to provide a socket for the reception of the stylus.

'7. A sound box stylus lever comprisin a stem and an enlarged head, the latter being folded on a longitudinal line, and havin on opposite sides of said longitudinal line,

grooves which cooperate to form a socket for the reception of the stylus, and'openings for the reception and play of separator pins.

8. A sound box stylus lever comprising a stem and an enlar ed head, the latter being folded on a central ongitudinal line, and having, on opposite sides of said central longitudinal line, pockets which, when the head is folded, cooperate to forma recess for thereception of the end of a tension spring.

9. A sound box stylus lever comprisin a stem and an enlarged head, the latter being folded on a longitudinal line, and having, on opposite sides of said longitudinal line, projecting pins, which, when the head is folded,- constitute pivot pins therefor.

10. A sound box stylus lever having a stem with an enlarged head, a longitudinal incision, and longitudinal. rooves on 0 pcsite sides of the latter, whic when the l fead is folded on a line co-incidin with-said incision, will form a socket for t e reception of the stylus.

11. A sound box stylus lever having a stem with an enlarged head, the latter having a longitudinal incision, longitudinal grooves, and laterally projecting pins, whereby, when the head is folded upon a line co-inciding with said incision, said grooves will form a socket for the rece tion of the stylus and the projecting pins, w ien bent outwardly, will serve as pivots for the stylus lever.

12. A sound b x stylus lever comprising a stem and an enlarged head, with longitudinal incision, longitudinal grooves and transverse head is folded on a line co-incid'ing with said erforations, whereby, when said head is folded on a line co-inciding with the incision", said grooves will form a socket for the reception of the stylus, and said perforations will beavailable for the spreader pins.

. 13. A sound box stylus lever comprising-a stem and an enlarged head, with central longitudinal incision, longitudinal, grooves, and transverse pockets, whereby, when said incision, said grooves will form a socket for the reception of the stylus and said pockets recess for the reception of .--the end of-a tension spring. "14.; A soundbox stylus lever comprising a will constitute a stem and an enlarged head, with central longitudinal incision, longitudinal grooves,

passage and support of projecting pins, transverse pockets and pairs of perforationaflwhereby, when the head is folded' on a line co-incidin'g with the incision, the longitudinal grooves will form a socket for the reception of the stylus, the perforations will provide for the support and passage ofseparator pins, the pockets will constitute a recess for the reception of the end of a tension spring, and the pins, when bent out- ;vardly, will serveas pivots for the stylus ever 4 In testimony-whereof, I have signed my name to'this specification, in the presence of two subscribmg witnesses.

, EDWIN H. MOBLEY. Witnesses HAMILTON D. TURNER, KATE A. BEADLE. I