US1488168A - Automatic brake - Google Patents

Automatic brake Download PDF

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Publication number
US1488168A
US1488168A US670301A US67030123A US1488168A US 1488168 A US1488168 A US 1488168A US 670301 A US670301 A US 670301A US 67030123 A US67030123 A US 67030123A US 1488168 A US1488168 A US 1488168A
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Prior art keywords
arm
brake
tone
movement
tone arm
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US670301A
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Raymond L Ruoff
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02Details

Definitions

  • This invention relates to automatic brakes, and has particular reference to a device of that kind, particularly adaptable for stopping the rotation of phonograph turn tables upon the completion of the. playing of a record disposed upon the table.
  • the primary object of the invention is to generally simplify and improve devices of the above kind whereby the same may meet with all of the requirements for a successful commercial use.
  • Another object ofthe invention is to provide an automatic turn table stopping device for phonographs which will be thoroughly reliable and efficient in operation, and which will comprise a minimum number of parts of simple and durable form, and so co-related as to render unlikely the probability of the device getting out of order.
  • a further object of the invention is to provide a brake of the above kind depending upon its operation by relative displacement of parts caused by the sensation of movement of the tone arm of a phonograph.
  • Figure 1 is a fragmentary view, partly intop plan and 'partly in horizontal section,
  • Figure 2 1s a View partly in elevation and .partly in section of the device shown in Figure 1.
  • Figure 3 is a fragmentary side elevational view illustrating details of the brake release mechanism
  • Figure 4 is a fragmentary plan view showing further details of the device.
  • 5 indicates' the casingor cabinet of a phonograph which has the usual horizontal turn table 7 that is fixed upon the upper end of a vertical drive shaft 8 which is driven in the usual manner by a governor controlled spring motor (not sho-wn).
  • a governor controlled spring motor not sho-wn
  • the record to be played is placed upon the turn table 7 in the usual manner for engagement by the needle 9 of a sound box 10 that is carried upon the inner end of a horizontally swinging tone arm 11, the outer end of which extends downwardly thru the top of the casing 5 and is hingedly mounted in the latter' for permitting the swinging of the tone arm 11 as above mentioned.
  • a horizontally swinging brake lever 12 is suitably pivot-ally mounted upon the top of the casing 5 beneath the marginal portion of the turn table 7, and this lever carries a brake shoe 13 adapted to swing outwardly into engagement with the inner surface of the depending rim of the turntable 7 for stopping rotation of the latter in a well known manner.
  • a spring 14 is provided for automatically swinging the brake member 12 to braking position, or in such position as to engage the brake shoe 13 with the turntable.
  • a catch 15 Pivotally mounted at one side of the turntable 7 for vertical swinging movement is a catch 15 that is normally urged downwardly by means of a spring 16 to engage behind the Vbrake lever 12 for holding the latter in released lposition as shown in Figures 1 and 3, and one end of the catch 15 is directed upwardly in the form of a crank arm 17 to which is attached one end of a flexible operating element or wire 18.
  • An arm 19 has its outer end mounted upon the vertical portion of the tone arm 11, so as to be capable of swinging horizontally and this arm extends inwardly between the top of the casing 5 and the turn table 7 where it is provided upon its free end with a friction gear segment 20.
  • a stub shaft 21 is provided on the top of the casing 5 beneath the turn table 7 and has a friction gear 22 journalled thereon, that has constant engagement with the friction gear segment 20, said friction gear 22 being fixed to a relatively large worm gear 23 that meshes with al worm 24e secured upon a horizontal shaft 25 which is mounted in suitable bearings beneath the turn table 7.
  • the shaft 25 is radially positioned as shown in Figure 1, and has a bevelled gear 26 upon its inner end that is in turn meshed with a bevelled gear 27 fixed arm whereby the arm 28 is caused to travel with the tone arm when the record is being played.
  • the arm 28 is disposed directly above the arm 19 and in a plane directly below the turn table 7 and the inner end of said arm 28 is pivotally engaged as at 30 With one arm of a bell crank lever 31 that is pivoted vfor horizontal swinging movement as at 32 upon the top of an intermediate enlarged portion oi' the arm 19.
  • the other arm of the bell crank lever 31 is attached to the flexible element or wire 18,
  • Movement of the arm 28 in one direction relative to the arm 19 is normally yieldingly prevented by means of a spring 38 that is attached to the inner end ot the arm 28 and to the enlarged portion 33 of the arm 19 as shown clearly in Figures 1 and 4. It is particularly noted that the arm 19 is not keyed to the tone arm 11 and may swing relative to the latter.
  • the brake lever 12 is swung, so as to disengage its brake slice 13 from the rim of the turntable 7 against the action or the spring 14, in which position said brake lever-is engaged behind the catch 15 Jfor holding the brake shoe released, the catch 15 being shown in engaging position with respect to the lever 12 by means of the spring 16.
  • the release of the brake shoe 13 permits turning of the turntable 7 under the influence of its operating motor as is Well known in the art.
  • the arm 28 is caused to swing with the tone arm 11 and through, the gearing described, the arm 19 is also caused to swing in synchronism. or unison with the tone arm and the arm 28.
  • the catch is disengaged from the brake lever 12 and the spring 14 then immediately swings said lever 12 to engage its brake shoe 13 with the rim of the turntable for stopping the latter.
  • the outer end oi the lever 12 and the catch 15 are formed with finger pie-ces for permitting their manual operation and there is suiiicicnt length to the Wire 18 and tooth 35 to permit the movement of the arms 19 and 28 as above mentioned.
  • an arm adapted' to be mounted to rotate relative to and upon the'tone arm of the phonograph, a second arm having one end adapted for attachment to said tone arm to be caused to move therewith, means to cause travelling movement of the iirst named arm in unison with the tone arm and the second named arm and to cause move ment of the irst namedarm past the stopping point of the tone arm at the completion o'l the playing of the record, and means operable upon such continued movement of the first named arm for arresting movement of the turn table.
  • an arm adapted to be mounted to rotate relative to and upon the ton'e arm of the phonograph, a second arm having one end adapted for attachment to said tone arm to be caused to move therewith, means to cause travelling'movement of the first named arm in unison with the tone arm and the second named arm and to cause movement ot the first named arm past the stopping point of the tone arm at the completion of the playing of the record.
  • means operable upon such continued movement of the first named arm for arresting movement of the turn table, said last named means comprising a normally applied brake member, a latch for holding the brake inember released, and means for releasing said latch operatively associated with the rst named arm.
  • an arm having its inner end disposed beneath the turn table and having its outer end mounted upon the tone arm whereby said arm may swing horizontally relative to the tone arm, driving connection between the turntable and the inner end of said arm including friction gearing for swinging said arm in unison with the tone arm when the latter is moved during t-he record playing operation, a second arm having, its outer end keyed to the tone arm to move therewith, and means operatively connected to said arm and operable upon relative displacement of the arms due to continued swinging movement of the rst named arm when the tone arm and second named arm are stopped at the end of a record, for releasing a normally applied brake of the turn table.

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  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Description

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' R. L. RUOFF AUTOMATIC BRAKE Filed Oct. 23 1923 2 Sheets-Sheet 1 March 25, 1924. 1,488,l68
l R.L.RUOFF y AUTOMAT I C BRAKE Filed Oct. 23 1923 2 Sheets-Sheet 2 Patented Mar. 25, i924.
RAYMOND L. RUOFF, OF PRESCOTT, ARIZONA.
f AUTOMATIC BRAKE.
Application filed October 23, 1923. Serial No. 670,301.
To all whom t may cancer/n:
Be it known that I, RAYMOND L. RUOFF, citizen of the United States, residing at Prescott, in the county of Yavapai and State of Arizona, have invented certain new and useful Improvements in Automatic Brakes, of which the following is a specification.
This invention relates to automatic brakes, and has particular reference to a device of that kind, particularly adaptable for stopping the rotation of phonograph turn tables upon the completion of the. playing of a record disposed upon the table.
The primary object of the invention is to generally simplify and improve devices of the above kind whereby the same may meet with all of the requirements for a successful commercial use.
Another object ofthe invention is to provide an automatic turn table stopping device for phonographs which will be thoroughly reliable and efficient in operation, and which will comprise a minimum number of parts of simple and durable form, and so co-related as to render unlikely the probability of the device getting out of order.
A further object of the invention is to provide a brake of the above kind depending upon its operation by relative displacement of parts caused by the sensation of movement of the tone arm of a phonograph.
Other objects will appear as the nature of the invention is better understood, and the same consists in the novel form, combination, and arrangement of parts hereinafter more fully described, shown in the accompanying drawings, and claimed.
In lthe drawings, wherein like reference characters indicate corresponding parts throughout the several views:
. Figure 1 is a fragmentary view, partly intop plan and 'partly in horizontal section,
of a phonograph equipped with a'brake mechanism constructed in accordance with the present invention.
` Figure 2 1s a View partly in elevation and .partly in section of the device shown in Figure 1.
Figure 3 is a fragmentary side elevational view illustrating details of the brake release mechanism, and
Figure 4 is a fragmentary plan view showing further details of the device.
Referring more in detail to the drawings, 5 indicates' the casingor cabinet of a phonograph which has the usual horizontal turn table 7 that is fixed upon the upper end of a vertical drive shaft 8 which is driven in the usual manner by a governor controlled spring motor (not sho-wn). It is to be understood that the record to be played is placed upon the turn table 7 in the usual manner for engagement by the needle 9 of a sound box 10 that is carried upon the inner end of a horizontally swinging tone arm 11, the outer end of which extends downwardly thru the top of the casing 5 and is hingedly mounted in the latter' for permitting the swinging of the tone arm 11 as above mentioned.
A horizontally swinging brake lever 12 is suitably pivot-ally mounted upon the top of the casing 5 beneath the marginal portion of the turn table 7, and this lever carries a brake shoe 13 adapted to swing outwardly into engagement with the inner surface of the depending rim of the turntable 7 for stopping rotation of the latter in a well known manner. In accordance with the present invention a spring 14 is provided for automatically swinging the brake member 12 to braking position, or in such position as to engage the brake shoe 13 with the turntable. Pivotally mounted at one side of the turntable 7 for vertical swinging movement is a catch 15 that is normally urged downwardly by means of a spring 16 to engage behind the Vbrake lever 12 for holding the latter in released lposition as shown in Figures 1 and 3, and one end of the catch 15 is directed upwardly in the form of a crank arm 17 to which is attached one end of a flexible operating element or wire 18. a
An arm 19 has its outer end mounted upon the vertical portion of the tone arm 11, so as to be capable of swinging horizontally and this arm extends inwardly between the top of the casing 5 and the turn table 7 where it is provided upon its free end with a friction gear segment 20. A stub shaft 21 is provided on the top of the casing 5 beneath the turn table 7 and has a friction gear 22 journalled thereon, that has constant engagement with the friction gear segment 20, said friction gear 22 being fixed to a relatively large worm gear 23 that meshes with al worm 24e secured upon a horizontal shaft 25 which is mounted in suitable bearings beneath the turn table 7. The shaft 25 is radially positioned as shown in Figure 1, and has a bevelled gear 26 upon its inner end that is in turn meshed with a bevelled gear 27 fixed arm whereby the arm 28 is caused to travel with the tone arm when the record is being played. The arm 28 is disposed directly above the arm 19 and in a plane directly below the turn table 7 and the inner end of said arm 28 is pivotally engaged as at 30 With one arm of a bell crank lever 31 that is pivoted vfor horizontal swinging movement as at 32 upon the top of an intermediate enlarged portion oi' the arm 19. The other arm of the bell crank lever 31 is attached to the flexible element or wire 18,
as: at 3e, and said Wire 18 is extended through a suitable guide tube 35 that has its ends respectively attached as at 36 and 37 to the portion 33 of the arm 19 and the top of the easing 5 oi the phonograph.
Movement of the arm 28 in one direction relative to the arm 19 is normally yieldingly prevented by means of a spring 38 that is attached to the inner end ot the arm 28 and to the enlarged portion 33 of the arm 19 as shown clearly in Figures 1 and 4. It is particularly noted that the arm 19 is not keyed to the tone arm 11 and may swing relative to the latter.
In operation, the brake lever 12 is swung, so as to disengage its brake slice 13 from the rim of the turntable 7 against the action or the spring 14, in which position said brake lever-is engaged behind the catch 15 Jfor holding the brake shoe released, the catch 15 being shown in engaging position with respect to the lever 12 by means of the spring 16. As the needle 9 has been previously engaged With the starting point in the groove of a record to be played, the release of the brake shoe 13 permits turning of the turntable 7 under the influence of its operating motor as is Well known in the art. When this takes place, the arm 28 is caused to swing with the tone arm 11 and through, the gearing described, the arm 19 is also caused to swing in synchronism. or unison with the tone arm and the arm 28. Thus, during t-he playing of the record there is no relative displacement between the arms 28 and 19 and the brake Will be held released. However, upon the needle 9 reaching the end of the sound groove in the record, the swinging movement of the tone arm 11 ceases, and by reason of the connection of the arm 28 with said tone arm, said arm 28 is stopped. Continued rotation of the friction gear 22 causes the arm 19 to continue to swing, so as to displace the same relative to the arm 28 and thereby cause swinging of the bell crank lever 31 in a direction to cause a pull to be exerted upon the Wire 18 Jfor causing upward swinging movement of the catch 13 against the action of the springs 38 and 16. lVhen this takes place, the catch is disengaged from the brake lever 12 and the spring 14 then immediately swings said lever 12 to engage its brake shoe 13 with the rim of the turntable for stopping the latter. The outer end oi the lever 12 and the catch 15 are formed with finger pie-ces for permitting their manual operation and there is suiiicicnt length to the Wire 18 and tooth 35 to permit the movement of the arms 19 and 28 as above mentioned.
From the above description, it is believed that the construction and operation, as Well as the advantages of the present invention Will be readily understood and appreciated by those skilled in the art.
Minor changes may be made Wit-hout departing fromV the spirit and scope of the invention as claimed.
1V hat I claim as newis:
1. In an automatic turn table brake for phonographs, an arm adapted' to be mounted to rotate relative to and upon the'tone arm of the phonograph, a second arm having one end adapted for attachment to said tone arm to be caused to move therewith, means to cause travelling movement of the iirst named arm in unison with the tone arm and the second named arm and to cause move ment of the irst namedarm past the stopping point of the tone arm at the completion o'l the playing of the record, and means operable upon such continued movement of the first named arm for arresting movement of the turn table.
2. In an automatic turn table brake for phonographs, an arm adapted to be mounted to rotate relative to and upon the ton'e arm of the phonograph, a second arm having one end adapted for attachment to said tone arm to be caused to move therewith, means to cause travelling'movement of the first named arm in unison with the tone arm and the second named arm and to cause movement ot the first named arm past the stopping point of the tone arm at the completion of the playing of the record. means operable upon such continued movement of the first named arm for arresting movement of the turn table, said last named means comprising a normally applied brake member, a latch for holding the brake inember released, and means for releasing said latch operatively associated with the rst named arm.
3.V In combination With the horizontally swinging'tone arm of a phonograph and the rotatable turntable of the latter, an arm having itsouter end rotatably disposed upon vthe tone arm and its inner end disposed be- Yicc neath the turntable, gearing between the turntable and the inner end of said arm for causing the latter' to swing in unison with the tone arm during the playing operation and to travel after movement of the tone arm has ceased upon completion of the playing operation, a second arm keyed to the tone arm to swing therewith, a bell crank lever pivoted upon the irst named arm and having one end pivotally engaged with the inner end of the second named arm, a normally applied brake, a latch for holding said brake released, and means connecting said latch with said bell crank lever for releasing the catch upon cessation of movement of the second named arm and continued movement of the first named arm.
4C. In combination with the horizontal turntable and the horizontally swinging tone arm of a phonograph, an arm having its inner end disposed beneath the turn table and having its outer end mounted upon the tone arm whereby said arm may swing horizontally relative to the tone arm, driving connection between the turntable and the inner end of said arm including friction gearing for swinging said arm in unison with the tone arm when the latter is moved during t-he record playing operation, a second arm having, its outer end keyed to the tone arm to move therewith, and means operatively connected to said arm and operable upon relative displacement of the arms due to continued swinging movement of the rst named arm when the tone arm and second named arm are stopped at the end of a record, for releasing a normally applied brake of the turn table.
In testimony whereof I aiiix my signature.
RAYMOND L. RUOFF.
US670301A 1923-10-23 1923-10-23 Automatic brake Expired - Lifetime US1488168A (en)

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