US747991A - Sound-reproducer. - Google Patents

Sound-reproducer. Download PDF

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Publication number
US747991A
US747991A US15314403A US1903153144A US747991A US 747991 A US747991 A US 747991A US 15314403 A US15314403 A US 15314403A US 1903153144 A US1903153144 A US 1903153144A US 747991 A US747991 A US 747991A
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US
United States
Prior art keywords
bar
casing
reproducer
sound
stylus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US15314403A
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
Original Assignee
AMERICAN GRAPHOPHONE CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMERICAN GRAPHOPHONE CO filed Critical AMERICAN GRAPHOPHONE CO
Priority to US15314403A priority Critical patent/US747991A/en
Application granted granted Critical
Publication of US747991A publication Critical patent/US747991A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank

Definitions

  • the bar is loosely mounted, preferably passing through a hole in the casing of such size that it does not touch the same in operation.
  • a guide rod or wire preferably in the form of a staple,whose ends are fitted and play with slight friction in holes drilled therefor in the casing.
  • Figure 1 is a front elevation; Fig. 2, a section lengthwise c of the stylus-bar, and Fig.3 a. part section transverse to the latter.
  • the stylus-bar A is attached at one end to the diaphragm B in any suitable way and at the other has a socket for reception of the stylus or needle a, which is held in place by set-screw 17.
  • Bar A passes through a hole 0 in diaphragm box or casing C, the hole being of such size that the bar A does not touch the casing.
  • a guide (1, consisting, as shown, of a piece of wire bent to U shape, the ends of the guide being inserted in holes drilled in flange c of the casing C, in which they fit snugly so as to play with slight friction.
  • the guide-wire could be fastened to the casing and fit loosely in the bar, this being simply a reversal of the construction.
  • I claim- 1 In a sound-reproducer, a stylus-bar passing freely without contact through an aperture in the casing, and having a guide rod or wire attached to said bar and playing freely with slight friction in a hole in said casing. 2. In combinationwith the diaphragm and its casing, a stylus-bar attached at one end to said diaphragm, and a U-shaped guide secured to said bar, its ends playing loosely in holes in said casing.

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Description

PATENTED DEC. 29, 1903.
T. H. MACDONALD. SOUND REPRGDUGER.
' APPLIOATION FILED APR. 17, 903.
N0 MODEL.
atbo'amuss.
awumfoz a/vi bwmm UNITED STATES i atented December 29,1903.
PATENT OFFICE.
THOMAS H. MACDONALD, OF BRIDGEPORT OONNECTICUT, ASSIGNOR TO AMERICAN GRAPHOPHONE COMPANY, OF WASHINGTON, DISTRICT OF COLUMBIA, A CORPORATION OF WEST VIRGINIA.
SOUN-D-REPRODUCER.
SPECIFICATION forming part of Letters Patent No. 747,991, dated December 29, 1903.
Application filed April 17, 1903. Serial No. 153,144. (No model.)
To all whom it may concern:
Be it known that I, THOMAS H. MACDON- ALD, a resident of Bridgeport, Connecticut,
have invented new and useful Improvements.
which is usually attached by means of a spring I to the diaphragm-box, the resiliency of the spring permitting limited vibration of the bar. According to this invention the bar is loosely mounted, preferably passing through a hole in the casing of such size that it does not touch the same in operation. To the stylus-bar is rigidly fastened a guide rod or wire, preferably in the form of a staple,whose ends are fitted and play with slight friction in holes drilled therefor in the casing. This construction avoids the use of springs, and
the parts can be very cheaply and quickly made and assembled.
In the accompanying drawings, Figure 1 is a front elevation; Fig. 2, a section lengthwise c of the stylus-bar, and Fig.3 a. part section transverse to the latter.
The stylus-bar A is attached at one end to the diaphragm B in any suitable way and at the other has a socket for reception of the stylus or needle a, which is held in place by set-screw 17. Bar A passes through a hole 0 in diaphragm box or casing C, the hole being of such size that the bar A does not touch the casing. To the bar A is attached a guide (1, consisting, as shown, of a piece of wire bent to U shape, the ends of the guide being inserted in holes drilled in flange c of the casing C, in which they fit snugly so as to play with slight friction. Obviously the guide-wire could be fastened to the casing and fit loosely in the bar, this being simply a reversal of the construction.
I claim- 1. In a sound-reproducer, a stylus-bar passing freely without contact through an aperture in the casing, and having a guide rod or wire attached to said bar and playing freely with slight friction in a hole in said casing. 2. In combinationwith the diaphragm and its casing, a stylus-bar attached at one end to said diaphragm, and a U-shaped guide secured to said bar, its ends playing loosely in holes in said casing.
In testimony whereof I have signed this specification in the presence of two subscribing witnesses. 1
THOMAS H. MACDONALD.
Witnesses:
A. B. KEOUGH, M. A. Foeo.
US15314403A 1903-04-17 1903-04-17 Sound-reproducer. Expired - Lifetime US747991A (en)

Priority Applications (1)

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US15314403A US747991A (en) 1903-04-17 1903-04-17 Sound-reproducer.

Applications Claiming Priority (1)

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US15314403A US747991A (en) 1903-04-17 1903-04-17 Sound-reproducer.

Publications (1)

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US747991A true US747991A (en) 1903-12-29

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Family Applications (1)

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US15314403A Expired - Lifetime US747991A (en) 1903-04-17 1903-04-17 Sound-reproducer.

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