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Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/16—Mounting or connecting stylus to transducer with or without damping means

Definitions

• TrroMA-s A TrroMA-s A.
• the object I haveV in view is to produce such a construction of phonograph that the reproducer can be readily adjusted to the record. This I accomplish by making the rej producing-point of ? less width than the re- @Ording-point, so that the reproducer will ? have a certain margin for adjustment, the
• Figure 1 is a top view of a phonograph embodying my invention.
• Fig. 2 is an elevation of the same machine from the front,
• corder and reproducer respectively, showing the recording-surface in' section.
• A is the frame of the machine, upon wh1ch is mounted in centers a b a shaft, B, which carries on one end the phonogram-cylinder C, forming the carrier for the phonogram-blank.
• This phonogram-cylinder is preferably given a slight taper on its external surface, adapting it to receive and hold the removable phonogram-blank.
• the shaft Bis provided with a wheel, D, through which the shaft is turned by connection with any suitable source of power, which may be an electric or spring motor or hand or foot movement.
• E and F are the recorder and reproducer. These are held by a spectacle-frame, G, which is pivoted on the end of the rocking holdingarm H.
• each eye of the spectacle-frame is provided with a iinger, c, having a set-screw, d, therein, which set-screws rest alternately upon a guiderest, I, which is mounted upon the frame of the machine in front of the phonogram-cylin der and parallel with its axis.
• the head of the rocking holding-arm has a laterally-extending arm, c, provided with an adjusting set-screw, e.
• the rocking holding-arm is attached to a sleeve, K, which'is mounted upon a stationary rod, L, supported upon kthe frame in the rear of the phonogram-cylinder and the shaft and parallel roo 4 therewith.
• this sleeve K At the other end of this sleeve K is a guide-arm, M, having a tooth'ed block, f,on its free end, which engages with a line screw-thread cut upon the shaft B between cylinder C and wheel D.
• This screw-thread feeds the recorder or reproducer lengthwise of the phonogram-cylinder while such cylinder is being turned through the medium of the shaft B and the power applied thereto.
• the phonogram-cylinder may continue to revolve without feeding the recorder or reproducer.
• N is a cylindrical phonogram-blank, which is made of wax or other suitable material, and is preferably provided with a tapering bore, the taper being similar to that of the phonogram-cylinder, so that the blank can be pushed upon the cylinder and will hold itself by friction thereon, and can be readily removed therefrom, the center b being mounted on a swinging arm, O, to permit this to be done.
• the recorder, Fig. 3, is composed of a plate
• the diaphragm 'i is clamped between this plate and screw-ring fi.
• the recordingpoint 7c is carried by the lever k', which is secured to a long bearing-pin, k2, mounted in bearings on the sides of the ring i.
• the recording-point passes through the lever 7a and is secured by cement to the center of the diaphragm.
• the reproducer, Fig. Li is composel of a plate, Z', similar to plate 71 and having asimilar tube, l', to which the listening-tube of the machine is attached.
• the diaphragm m of the reproducer is held by the ring m', which is screwed to the plate l, and a stretching screw-ring, m2, is provided for adjusting the tension of the diaphragm.
• the reproducing-point n is a wire attached to the ring m at one side and connected with the diaphragm by a block of rubber, n', the point of the wire being turned down to engage with the surface of the record.
• the recording-point is made from fiat plate-steel with its side edges slightly filed away, as shown in the exaggerated View, Fig. 5, the thickness of the steel plate being in my present phonograph about one one-hundred-and-iftieth part of an inch.
• the recording-point Since my apparatus is designed to make about one hundred threads of the record to the inch, the recording-point must be slightly narrower than one one-hundredth part of an inch, in order to leave a ridge between the tracks of the record.
• the reproducing-point is finished by filing the 'end of the wire down to a point and then burnishing off the extreme point and buffing such point so as to leave a rounded point, which is approximately about half as wide as the recording-point or one three-hundredth part of an inch.
• Vhat I claim isl.
• the reproducer having its point narrower than the indentations forming the sound-record, in combination with means for adjusting such reproducer laterally across the track of the rec-ord, substantially as set forth.
• the reproducer having its point narrower than the indentations forming the sound-record, in combination with a phonogram-blank carrier adapted to receive a removable phonogram-blank, substantially as set forth.
• the reproducer having its point narrower than the indentations' forming the sound-record, and means for adj usting such reproducer laterally across the track of the record, in combination with a phonogram-blank carrier adapted to receive a removable phonogram-blank, substantially as set forth.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Description

Publications (1)

Family

ID=2469609

Family Applications (1)

Country Status (1)

• 0
  • US US400647D patent/US400647A/en not_active Expired - Lifetime

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