US1024640A - Support and sound-duct for sound-boxes. - Google Patents

Support and sound-duct for sound-boxes. Download PDF

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Publication number
US1024640A
US1024640A US56131210A US1910561312A US1024640A US 1024640 A US1024640 A US 1024640A US 56131210 A US56131210 A US 56131210A US 1910561312 A US1910561312 A US 1910561312A US 1024640 A US1024640 A US 1024640A
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United States
Prior art keywords
sound
tone
arm
boxes
duct
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Expired - Lifetime
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US56131210A
Inventor
Thomas H Macdonald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMERICAN GRAPHOPHONE Co
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AMERICAN GRAPHOPHONE CO
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Publication date
Application filed by AMERICAN GRAPHOPHONE CO filed Critical AMERICAN GRAPHOPHONE CO
Priority to US56131210A priority Critical patent/US1024640A/en
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Publication of US1024640A publication Critical patent/US1024640A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02Arrangements of heads

Description

, T. H. MACDONALD. surom AND soUnD Duo'rro soUND Bons.
APPLIGATIoy-HLED In 14,r 1910. p
Patented Apr. 30, 1912.
UNITED STATES PATENT oEEIoE.
THOMAS H. MACDONALD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO AMERICAN GRAPHOPHONE COMPANY, 0F BRIDGEPOR'T, CONNECTICUT, A- CORPORATION OIE' WEST VIRGINIA.
Specification of Letters Patent.
' .Patented Apr, `3()` j Q1 n application filed May 14, 1910. Serial No. 561,312.
To @Zwhom fit may concern:
Beit known that I, THOMAS H.MAcnoN- ALD, a citizen .of the UnitedStates, and resichines, and is especially adapted for use.
with the so-called Grafonola or graphophone inclosed wit-hin a cabinet which conceals its horn, though of course it can be used with other types.
The invention consists of the construction and arrangement of parts, and will be vbest understood by reference to the annexed drawings in which- `Figure 1 is a side View, partly in vertical section of a tone arm embodying my inver.- tionand applied to a Grrafonola;I Fig. 2 is a top view of the same, partly in horizontal section; and Fig, 3 is a transverse section, viewed from the right, through lines 3-3 "of Fig. 1.
1 is the base-plate (of the Grafonola, or other type of talking-machine).
2 represents the turn-tablel and disk?l sound-record thereon. 1
ters the horizonta slot 7 in the member 5,.,
to permit limited )lay of the elbow upon a vertical axis. The upper (horizontal) end of the elbow-member 5 has a flaring mouth of hemispherical oi tline. Seatedtherein is the ring 8, whose outer surface is correspondingly convexei to fit the concave mouth ot' member 5. The ring 8 is pivoted within its seat in mimber 5,v by means of the horizontal screw-pins 9 9, whose inner ends furnish the jourials for the ring 8.
The tapering tone-arm proper 10 has near its larger end a shoulder 11, beyond which 1s the ,cylindrical bearing-surface that journals 'or swivels withinv the bore of ring 8. A pin 12, secured in ring 8, preferably depending from the top thereof, extends into an annular' groove or slot 13 i-n the adjacent portion of tone-arm 10, to permit limited axial turning of the tone-arm Within ring 8. f
The sound-box .14 may, if desired, be. made integral with the tone-arm; and it carries the usual stylus-bar for the reproducing-needle 15, which co-acts with the record on turn-table 2, in the well known manner. v 16 is a screw located in the lower part of the elbow-member 5, and enters a longitudinal. slot 17 in the'adjacent portion of ring 8 and of tone-arm v10. This engagement prevents tone-arm 10'v from tippingaxially; but by swinging the tone-arm and. soundbox upward (upon bearings 9 9), 'their slots are disengaged from pin 16, after which the tone-armcan vbe turned axially,
journaling in ring 8, so as to bring needlel5 uppermost for ready removal.
In, the position shown in Figs. 1 and 2, y
the tone-arm 10 and its sound-box can swing freely in the horizontal plane, but the diaphragm of the sound-box cannot be tipped out of its vertical plane.
When, however, thev tone-arm is'swung up (on bearings 9-9), it may then be turned axially;l whereupon the pin 16 abuts, as a stop', against the inner end of the tone-arm, and holds the same securely away from the record. p'
I have described my invention with some particularity, but only for the sake of clearness, since parts may be used to the exclusion of other parts, modifications ofl construction and arrangement mlght be resorted to, the device might be used with-some other type of talking-machine than the Grafonola, and other modifications might be made withoutl departing from the spirit of my invention.
Having thus described claim 1. The combination with the sound-box of a talking-machine, of a supportand soundduct therefor comprising a tubular member journaling in ai'ixed bearing, a second tubumy invention, I
US56131210A 1910-05-14 1910-05-14 Support and sound-duct for sound-boxes. Expired - Lifetime US1024640A (en)

Priority Applications (1)

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US56131210A US1024640A (en) 1910-05-14 1910-05-14 Support and sound-duct for sound-boxes.

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