US1236542A

US1236542A - Brake mechanism for automatic instruments.

Info

Publication number: US1236542A
Application number: US2613715A
Authority: US
Inventors: Forest Cheney
Original assignee: CHENEY TALKING MACHINE Co
Current assignee: CHENEY TALKING MACHINE Co
Priority date: 1915-05-05
Filing date: 1915-05-05
Publication date: 1917-08-14
Anticipated expiration: 1934-08-14

Description

F. CHENEY.

BRAKE MECHANISM FOR AUTOMATIC NSTRUMENTS. APP'LlcATloN man 1AN.12,19|2. RENEwED MAY 5,1915.

1,236,542.. PatentedAug.14,1917.

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FOREST CHENEY, OF JAMESTOIVN, NEW YORK, A-SSIGNOR, BY MESNE ASSIGNMENTS, TO

CHENEY TALKING MACHINE cor/IP ANY, or CHICAGO, ILLINOIS, Af conronA'rIoN or ILLINOIS.

BRAKE MEGHANISM FOR AUTOMATIC INSTRUMENTS.

i Application filed January 1,2, 1912, Serial No. 670,933.

To all whom it may concern:

Be it known that I, FOREST CHENEY, a citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvementsin Brake Mechanism for Automatic Instruments, of which the following, taken in connection with the accompanying drawings, is a specilication.

The invention relates to controlling devices for automatic instruments; and the object of the improvement is to provide simple and accurate metronomic mechanism for controlling and regulating the tempo and pitch of musical records played by automatic musicall instruments.

The value of the musical composition depends entirely upon the manner in which itl will be able to set the speed of the rotating disk or cylinder in exact accord with the proper tempo, thus causing the automatic musical instrument to reproduce the composition in the same tempo and pitch in which the original record was made. The metrometer controls the, rotating speed of the disk or cylinder upon which the recordis played and by means of a dial and indicator the exact number of rotations per minute may be determined. This correct number of rotations per minute is placed upon the disk or cylinder and will enable any operator to know at once the correct tempo and pitch, for the tempo and pitch are controlled by the speed of rotation.

The invention consists in the construction and arrangement of the metronomic parts as described in this specification and shown in the drawings and pointedy out in the claims.

In the drawings, Figure 1 is a plan view of the power mechanism for an automatic instrument showing metronomic mechanism.attached thereto. Fig. 2 is a sectional view at line X X in Fig. 1; Fig. 3 is a sectional view at line Y Y in Fig. l; and Fig. 4 isa sectional view at line Z Z in Fig. 1 showing views of the metronomic or Specification of Letters Patent.

Patented Aug. 14, 1917. Renewed `May 5, 1915. Serial No. 26,137.

controlling mechanism for the power mechamsm of the instrument. Fig. 5 is a plan view of the adjusting screw and the dial of the metrometer. Fig. 6 is a detail of the angular guide plate for adjustino the cam.

Like numerals of reference refer to corresponding parts in the several views.

The numeral 10 designates the top plate of the instrument which has attached toits under side the plate 11 with bracket 11 for supporting one end of the shafts of the power or driving mechanism and the metronomic mechanism. Plate 11 has a second bracket 12 at a spaced distance from bracket 11 to hold the opposite ends of the shafts.

The main driving shaft 13 has the coil springs 14 attached thereon and a driving gear 15 which meshes in gear 16 on short shaft 17 on plate 11, which shaft 17 also has the gear 18 keyed thereon which meshes in gear 19 on short shaft 2O on platek 11., The shaft 20 also has keyed thereon the gear 2l which meshes in gear 22 on shaft 23.

The shaft 23 has gearl 24 thereon which meshes in gear 25, thereby turning gear 26 "which meshes in worm 27 on shaft 2 8. Ther at one end and has attached to its4 opposite end the felt blockor brake shoe 32.VA The spring 31 normally holds the felt brake shoe. 32 away from the edge 44 of the wheel 30. A cam 33 is mounted on shaft 34 and bears against the spring 31 pressing the brake shoe 32 against the beveled edge 44 of the balance wheel 30. The shaft 34 extends up through plates l0 and 11 and is turned to form an indicator 35 or has an indicator 35, attached thereto, which indicator extends to, scale or dial 36; the other end of the. shaft 34 is pivotally mounted in the end of angular lever plate 37. The plate 3,7 is pivotally attached at 38 on bracket 11 about midway of its length so that the two ends of the` lever may move reciprocally back and forth on the pivotal mounting. The pivotal movement of the plate 37 is only for the` exact adjustment of cam 33, which adjustment is attained by means of a screw 39 which has a cone-shaped end 40 and is mounted through plate l0 and a projecting luo 4l on bracket 11. IIhe cone-shaped end Ll0 bears against a curved opening l2 in the side of bracket 11 on one side and against a curved opening 43 in the side of angular plate 37. It is apparent that screw 39 may thus adjustthe position of plate 37 with great accuracy as the beveled end l() of screw 39 presses down between bracket 11 and plate 37, or is withdrawn from between said parts, thereby moving the end of plate 37 and the cam 33 nearer to or farther from spring 31.

It is now apparent that the pointer may be turned to any point on the dial 36 desired by actuation of the screw 39 and that a predetermined pressure will be placed upon the balance wheel 30 thereby controlling the governor and causing it -to move at a predetermined speed, and that said speed may be determined and adjusted with great accuracy by means of the screw 39 and plate 37.

On the dial in Fig. 5 the pointer 35 stands at 70 which means that the metrometer will control the rotating speed of the disk or cylinder upon which the record is played so that it will rotate 70 times per minute. A composition which should be played in that tempo would have the numeral 7 O placed on the disk or cylinder and the operator will have only to turn the pointer 35 to the numeral 70 on the dial in order able driving mechanism, a governor to have the composition correctly rendered, both as to tempo and pitch by the automatic instrument. Should the correct speed of the original record be 50 revolutions of the disk or cylinder per minute, the pointer should be turned as shown in dotted line on the dial, thereby insuring the correct rendering of the composition in the same tempo and pitch in which the original record was made.`

I claim as new:

l. In a device of the class described, sulitor said driving mechanism, a balance wheel on said governor, a spring pressing away from said balance wheel, a brake shoe on said spring, a cam to press said brake shoe against said balance wheel, a pointerto turn said cam, a dial for said pointer, and mechanism for graduating the adjustment of said cam with accuracy. 4

2. In a device of the class described, driving mechanism, a governor for said driving mechanism comprising a balance wheel, a pivotally mounted arm, a brake shoe mount ed independently of said arm and adapted to bear against said balance wheel, means carried on one end of said arm for pressing said brakeshoe against said balance wheel with a predetermined pressure, and means coperating with the opposite end of said arm to adjust said means for pressing said brake shoe against said balance wheel.

3. In a device of the class described, power mechanism, a governor for said power mechanism, a balance wheel on said governor, a spring pressing awayV from said balance wheel, a brake shoe on. said spring, a cam to press said spring and brake shoe against said balance wheel, a pointer attached to said cam for turning the same, a dial for said pointer to determine the speed of said mechanism, a plate pivotally mounted and supporting said cam and pointer on one end, and a screw with a cone-shaped end between the other end of said plate and the supporting frame to graduate the adjustment ofV said cam in its relation to said brake shoe. Y

4. In a device of the class described, a driving mechanism, a governor for said driving mechanism, abalance wheel on said governor, a spring pressing away from the balance wheel, a brake shoe on the end of said spring, and means for pressing the brake shoe against said balance wheel with an adjustable predetermined pressure.

5. In a device of the class described, drive Y ing mechanism, a governor for said driving mechanism, a disk on said governor, a brake shoe to coact Vwith said disk, means unattached to and contacting with said brake shoe to adjust the pressure of the brake shoe on said disk, and vindependent adjustingV means to vary the effect ofvsaid first-named means. Y Y

6. In a device of the class described, driving mechanism, a governor for said driving mechanism comprising a balance wheel, a spring` pressing away from said balance wheel, a brake shoe carried by said spring, and a cam to press said brake shoeagainst said balance wheel.

7. In a device of the class described, drivance wheel, a spring by which said brake shoe is carried, adjustable means coacting with said spring to vary the pressure of the brake shoe on said balance wheel, `and separately controlled means tograduate the adjustment of the adjustable means. Y

9. In a device of the class described, driving mechanism, a governor for said driving mechanism, a balance wheel on said governor, -a Abrake shoe adapted tocoact with the balance wheel, a spring by which the brake shoe is carried, a cam coacting with said spring to vary the pressure of the brake shoe on said balance wheel, a shaft upon which the cam is mounted, and means to adjust the position of said shaft to regulate the adjustment of the cam.

l0. In a device of the class described, driving mechanism, a governor for said driving mechanism, a balance wheel on said governor, a brake shoe adapted to coact with the balance wheel, a cam adapted to press said brake shoe against the balance wheel, means to rotate said cam, and means to m`ove the cam bodily toward and away from the brake shoe.

11. In a device of the class described, driving mechanism, a governor for said driving mechanism, a balance wheel on said governor, a spring pressing away from said hala-nce wheel, a brake shoe on said spring, a cam to press the brake shoe against the balance wheel, a combined handle and pointer to rotate the cam, and a dial over which the handle and pointer move.

12. In a device of the class described, a balance wheel, a brake shoe adapted to coact with said balance wheel, means tending normally to move said brake shoe out of contact with said balance wheel, adjustable means to press said brake shoe against said balance wheel in opposition to the action of said iirst named means, and independent adjusting means to vary the eii'ect of said second named means.

13. In a device of the class described, a rotatively mounted disk, a brake shoe adapted to co-act with said disk, an angular 1ever mounted adjacent said disk, means carried by one arm of said lever for pressing said brake shoe against said disk, a fixed support adjacent the other arm of said lever, and adjustable means interposed between said fixed support and said other arm to vary the position of said lirst named arm with respect to said disk.

In testimony whereof I have aiiXed my signature in the presence of two witnesses.

FOREST CHENEY.

Witnesses:

A. W. Kn'rrnn, H. U. HARRIS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.