US1800234A - Telephone muffler - Google Patents

Telephone muffler Download PDF

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Publication number
US1800234A
US1800234A US375065A US37506529A US1800234A US 1800234 A US1800234 A US 1800234A US 375065 A US375065 A US 375065A US 37506529 A US37506529 A US 37506529A US 1800234 A US1800234 A US 1800234A
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United States
Prior art keywords
telephone
orifice
transmitter
sound
wall
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Expired - Lifetime
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US375065A
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English (en)
Inventor
Harry C Tuttle
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Individual
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Individual
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Priority to US375065A priority Critical patent/US1800234A/en
Application granted granted Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor

Definitions

  • Patented Apr. 14, 1931 I 1,800,234
  • This invention relates to an instrumenresult in a decidedly inartistic structure so tality by means of which a telephone user that those who have objections to the ordimay speak into a telephone transmitter while nary telephone when equipped with an ordipersons are within hearing distance of his nary type of muffler would doubtless object '5 voice without those persons being able to hear to such an extent that the use of a mufiier of 65 what he is saying and, speaking broadly, may the ordinary type with the hand set type of be denominated a telephone silencer or instrument would not be commercial. mufller.
  • a further object is to provide a telephone try but such devices are objectionable to some silencer which will be a complete unit in it because, being rather large, they detract from self, standing on its own base at the correct the symmetrical appearance of the telephone height to receive the telephone transmitter set and become tiresome to the eye, as they in the normal position of-use. So are usually always in place even though the A further object of applicants invention necessity for their use may arise but rarely. is the production of a device of the type spew At the present time, a decided preference ified which will act efficiently as a mufiler, in
  • a further object of the invention is to pro
  • the well known forms of silencers devide a device of the type specified which will signed to be permanently attached to a transnot only function efficiently as a muffler but mitter were not intended, so far asI am aware, will also be an artistic utility as a desk piece to be used in association with the hand set adapted to perform the functions of some type of instrument, furthermore, the placing one or more of the well known desk pieces or of the ordinary and well known mufflers on articles of furniture.
  • such a type of instrument would hamper the Further objects and advantages will applacing of the set on its cradle and would pear as the description of the particular physical embodiment selected to illustrate the invention progresses, and the novel features of the invention will be particularly pointed out in the appended claims.
  • Figure 1 is a top plan view of a device embodying my invention
  • Fi 2 is a cross-sectional view of the device as shown by Fig. 1, on the plane indicated by the line HII, viewed in the direction of the arrows at-the ends of the line, and also showing the position of-the lips and surrounding face contour of a user
  • Fig. 3' is a cross-section view on the plane indicated by the line lll lll of Fig. I, viewed in the direction of the arrows at the ends of the, line, and also showing the position of a telephone instrument when used in connection therewith.
  • My invention contemplates in essence a walled chamber provided with one orifice through which sound issuing from the sounc organs of a person may be directed and an-v other orifice into which the diaphragm end of a telephone transmitter may be inserted and. rotated and/or pushed to a proper receptive position adjacent to and in line with the direction of the sounds delivered into the sound receiving orifice.
  • structure might well be so made but it is-to be understood that although the structure is a walled chamber it is not to be understood that each well is necessarily separate and distinct from any other or all the other walls because two walls or three walls or even four walls may be formed from a single sheet of material or molded in one piece. In fact, it might well be that'the preferred method of making the device would be to make all of the walls integral with the exception perhaps of the baseor bottom wall.
  • the right side wall is designated 1; the left side wall, 2; the back wall,,3; and the front wall, 4.
  • the base or bottom wall is designated 5 and the top wall is designated 6.
  • the base or bottom wall 5 removably fitted into a rabbet, as 7, formed in the side walls and in the front and back walls.
  • the bottom wall 5 may well be held in place by various means but I prefer countersunk machine screws as 8 passing through the base and threaded into the ends of the side,- front, and back walls.
  • the top wall 6 is to be formed with an orifice 10, best shown in Fig. 1.
  • This orifice will appear somewhat elliptical n plan view as shown in Fig. 1 and the edges will be well rounded, as best shown in Fig. 2, to theend that they will be unobjectionable when pressed against the portion of the face surrounding the lips of person.
  • the front edge 11 of theorilice will be positioned slightly lower than the rear edge 12 as such construct on provides an opening which will best receive, in a sound-tight manner, the
  • Fig. 2 The manner in which the lips of a user will be positioned and the manner in which the orifice 1O conforms to the face of the user is best shown by Fig. 2 in which a portion of the face of a user is illustrated.
  • the top wall 6 along the lines and 16 curves upwardly and inwardly from the back and from the front in such manner that the line 15, as best shown is Fig. 2, is substantially the arc of a circle.
  • the portion of the top Wall which is to the rear of the orifice 10, that is, the portion 17 is dished inwardly as best shown in Fig. 2 so that it offers no impediment to the nose of a user.
  • the front portion of the top wall 6, that is the portion 18, is also dished inwardly, as best shown in Fig. 2 so that it does not interfere with the chin of the user.
  • the mouth opening or sound receiving orifice has been described as being in the top wall 6 it is to be understood that in a broad sense the top wall, insofar as this invention is concerned, should be interpreted as meaning the upper portion of the device because applicant does not intend to exclude a construction in which the sound receiving orifice may be so positioned as to well be described as being in the side wall adjacent the top.
  • the side wall 2 is provided with a circular orifice 19.
  • This orifice is provided with marginate flexible and compressible or resilient material such as soft rubber.
  • This material preferably takes the form of a somewhat annular body provided. with a groove 20.
  • the annular member 21 may be positioned, as shown in Fig. 3, by slightly compressing the walls, positioning it properly in the orifice 19 and then allowing it to expand whereupon the annulus will lock itself in position with the wall 2 situated within the groove 20.
  • the annulus 21 on the portion situated within the chamber 22 is formed with a flange 23 of such shape that it may rest nicely against the front face of the cap of a telephone receiver and the portion intermediate between the flange 23 and the groove is made of such form that it will fit snugly against the side face of the cap of a telephone receiver of the hand set type.
  • the plane of the flange 23 is not parallel with a side wall as 2 but is inclined at an angle thereto, as best shown in Fig.
  • the diaphragm opening of the transmitter may be brought just beneath the orifice 10 and be positioned in relation thereto such that the transmitter will be in substantially the same position as regards the lips of a person speaking into the orifice 10 as it-Would be if the muffler were .not being used.
  • the position of the transmitter end of the telephone 24 is shown in Fig. 3 as it would be when a person is talking into the orifice 10.
  • a chamber the walls of which flare downwardly so that such sound as is not necessary to transmission will be directed downwardly toward a sound absorbing medium 26 placed within the base of the chamber.
  • This sound absorbing medium 26 may be of any desired,appropriate material such as soft felt, Wood pulp or the like, and preferably fills the entire space between the walls, rising a considerable distance therein, and is supported by the bottom wall 5.
  • the hollow shell embodying my invention is so designed as to flare downwardly with the object of directing the excess volume of sound which is not essential to transmission in a downward direction toward the sound absorbing medium placed in the larger end of the chamber constituting the base where it will be absorbed with the result that its tendency to penetrate the walls and its tendency to reverberate is minimized.
  • Vhile I have herein illustrated a silencer having sound absorbing material of substantial thickness at its base, obviously the device might be interiorly lined with the sound absorbing material.
  • lVhile I prefer for theoretical reasons, to have the flarestart at the top of the device and gradually increase toward the base, for commercial reasons in minimizing the size I show the side walls 1 and 2 substantially vertical down to about the point 27, as designated in Fig. 3, a little over one half the height, but from that point downwardly to have the sides flare.
  • 'llhese flares not only serve the useful function of reflecting the sounds within the chamber downwardly to the sound absorbing medium 26 rather than upwardly where they may act upon the diaphragm of the telephone transmitter but also assist inincreasing the stability of the device.
  • flaring of the side walls toward the base provides a c'ross sect-ion at that point where the sound absorbin material is placed which is severaltnnes the cross-sectional area at the point wherethe soundis generated by the speaker.
  • plicant prefers to mount some one of the well known desk facilities upon one side of the device and to that end illustrated a clock, 28,
  • ppli'cant has pro du'ced artele-p-h-one mu-fller which is an accessory' rather than an attachment to a tel phone that is so constructed and formed that it is a stable device resting upon its own base and.
  • a clock that it is so constructed that the transmitter end oia hand set type of telephone may' be easily conveniently man u-a lly inserted and manually held within an ori flce thereof and make sound tight connectionvwith a material surrounding and positionedin said orifice; that it is so formed that it fits, in a sound tight manner, the portion oi the face surrounding the lips of a person anail, consequently, may be used eiiiciently as a telephone mufller to prevent persons within hearin distance from overbearing a telephone conversation when-the device is used; and that the use of the device rather tendsto improve telephonetransmission than otherwise because the use of the'de-vice practically necessitates
  • a telephone muflier in combination, material forming-an enclosed walled chamber with a substantially fiat base and side walls flaring slightly outwardly in a direction toward the base and a top curving inwardly and upwardly, a side wall being formed with an orifice for the reception of a telephone transmitter and the top being formed for the reception of the mouth and lips of a person.
  • a bottom wall serving as a base; two side walls slightly flaring outwardly-toward the bottom well, one being formed with an orifice for the partial reception of a telephone transmitter a front wall and a back wall each flaring slightly outwardly toward the bottom Wall, a top Wall, said top wall curving inwardly and upwardly fromv each side wall and formed with an orifice formed to receive the mouth and lips of a person with the mar ginal edges in contact with the portionof the face surrounding the lips and a substantial thickness of a sound deadenim material positioned over all the bottom wall.
  • a telephone muffler comprising an upright portable hollow box-of a size suitable for desk use and having flaring lateral. walls providing a relativelybroad base, a mouth 7 opening in the top portion of the box for the reception of downwardly directed sound, an
  • a bottom wall serving as a base
  • two side walls slightly flaring outwardly toward the bottom wall, one being formed with an orifice tor'the partial reception of a telephone transmitter
  • a telephone mufiler for the hand set type of telephone comprising a sound tight walled chamber, said chamber being formed 10 with a sound receiving orifice and an orifice shaped for receiving and making a sound tight connection with the transmitter end of the telephone when manually held therein.
  • a wall having an orifice therein for the reception of the transmitter end of the telephone, and a bushing within the orifice in said wall, said bushing being formed from flexible material and shaped to receive the transmitter end of the telephone and make a sound tight connection therewith when manually held therein.
  • a wall having an orifice 25 therein for the reception of the transmitter end of the telephone, and a bushing within the orifice, said bushing being formed from flexible material and having an inwardly extending shoulder for limiting the inward movement of the telephone transmitter and making a sound tight connection therewith.
  • a bushing for the transmitter orifice of a telephone mufiler adapted to the hand set type of telephone consisting of flexible material and having a converging inner surface
  • a bushing for the transmitter orifice of a telephone mufller adapted to the hand set type of telephone consisting of flexible mate- 45 rial and having a converging inner surface, a

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
US375065A 1929-07-01 1929-07-01 Telephone muffler Expired - Lifetime US1800234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US375065A US1800234A (en) 1929-07-01 1929-07-01 Telephone muffler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US375065A US1800234A (en) 1929-07-01 1929-07-01 Telephone muffler
GB22353/29A GB327926A (en) 1929-07-20 1929-07-20 Telephone mufflers

Publications (1)

Publication Number Publication Date
US1800234A true US1800234A (en) 1931-04-14

Family

ID=10178021

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Application Number Title Priority Date Filing Date
US375065A Expired - Lifetime US1800234A (en) 1929-07-01 1929-07-01 Telephone muffler

Country Status (6)

Country Link
US (1) US1800234A (ru)
BE (1) BE362912A (ru)
DE (1) DE518223C (ru)
FR (1) FR679978A (ru)
GB (1) GB327926A (ru)
NL (1) NL26028C (ru)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165916A (en) * 1962-01-09 1965-01-19 Du Pont Noise-reducing structure
US3925616A (en) * 1974-04-30 1975-12-09 Bell Telephone Labor Inc Apparatus for determining the glottal waveform
US8948411B1 (en) * 2014-02-18 2015-02-03 Scott A. Moser Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9253299B2 (en) 2014-02-18 2016-02-02 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9386135B2 (en) 2014-05-16 2016-07-05 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9525765B2 (en) 2014-02-18 2016-12-20 Quiet, Inc. Ergonomic anechoic anti-noise canceling chamber for use with a communication device and related methods
US9576567B2 (en) 2014-02-18 2017-02-21 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9614945B1 (en) 2014-02-18 2017-04-04 Quiet, Inc. Anti-noise canceling headset and related methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458199A (en) * 1947-04-15 1949-01-04 Albert C Reinhold Telephone transmitter support and silencer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165916A (en) * 1962-01-09 1965-01-19 Du Pont Noise-reducing structure
US3925616A (en) * 1974-04-30 1975-12-09 Bell Telephone Labor Inc Apparatus for determining the glottal waveform
US8948411B1 (en) * 2014-02-18 2015-02-03 Scott A. Moser Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9253299B2 (en) 2014-02-18 2016-02-02 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9525765B2 (en) 2014-02-18 2016-12-20 Quiet, Inc. Ergonomic anechoic anti-noise canceling chamber for use with a communication device and related methods
US9576567B2 (en) 2014-02-18 2017-02-21 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods
US9614945B1 (en) 2014-02-18 2017-04-04 Quiet, Inc. Anti-noise canceling headset and related methods
US9386135B2 (en) 2014-05-16 2016-07-05 Quiet, Inc. Ergonomic tubular anechoic chambers for use with a communication device and related methods

Also Published As

Publication number Publication date
BE362912A (ru) 1929-09-30
DE518223C (de) 1931-02-20
NL26028C (ru) 1932-09-15
GB327926A (en) 1930-04-17
FR679978A (fr) 1930-04-23

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