US1071744A - Antivibration device for centrifugal governors. - Google Patents

Description

N. H. HOLLAND. ANTIVIBRATION DEVICE FOR GENTRIFUGAL GOVERNORS. APPLICATION FILED 11110.17, 1012.

1,071,744. Patented Sept. 2,1913.

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NEWMAN I-I. HOLLAND, OF WEST ORANGE, NEW JERSEY, ASSIGNOR TO THOMAS A. EDISON, INCORPORATED, OF WEST ORANGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

. atented Sept. 2, 1913.

Application filed August 17, 1912. Serial No. 715,546.

To all who 11bit may concern Be it known that I, Nmvamn H. HOL- LAND, a subject of the King of Great Britain, and a resident of WVest Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improve ments in Antivibration Devices for Centrifugal Governors, of which the following is a description.

My invention relates to antivibration de vices for centrifugal governors and more particularly to such a device as applied to governors of the type in which a plurality of weighted spring arms are movable outwardly under the action of centrifugal force.

In all machines, especially in those providcd with motors, vibrations are created by the operation of the machine. For example, in an Edison business phonograph, such vibrations originate mainly in the motor and are probably augmented by other parts of the phonograph, in the operation thereof. \Vhen a centrifugal governor, especially one having a plurality of weights mounted on spring arms, is used on such a machine for controlling its speed, or for other purposes, the governor is very liable to partake of and amplify these vibrations. To obtain the best working conditions, it is, of course. dosirable in all machines, to eliminate 'vibra tions thereof .in so far as it is possible to do so, and especially this the case in an ap paratus such as a phonograph where the result thereof is in'lperfcct recording or reprodueing.

The objects of my invention are to prevent a governor from partaking of and amplifying the vibrations of a machine to which it is applied and to provide simple and efficient means for accomplishing this result.

In order that my invention may be more clearly understood, attention is directed to the accompanying drawings forming a part of this specification, in which the same reference characters are used to designate corresponding parts throughout, and in which:

Figure 1 is an elevation of a motor for a phonograph provided with a centrifugal speed governor having an anti-vibration device applied thereto, in accordance with my invention. Fig. 2 is an end elevation of the governor with the anti-viln'ation device applied thereto, as shown in Fig. 1; and Fig. 3 is an enlarged cross sectional View on line a e of Fig. 1.

Referring to the drawings, reference character 1 represents a motor, which is here shown as an electric motor of the type usually employed in .lhlison business phonegraphs. The motor is suitably attached to the supporting plate 2 and power may be taken from the shaft 3 thereof by means of pulley 't and belt 5. In order to control the speed of the motor 1, I provide brake mechanism comprising any suitable centrifugal governor 6 adapted to cooperate wit-h an adjustable brake arm 7 provided with friction pads S. In the device shown in the drawing, the governor (3 comprises a shaft, forming an extension of the motor shaft 3, a collar 5) fixed to the shaft, a collar '10 loose on the shaft and carrying the usual friction disk 11. adapted to cooperate with the friction pads 8 of the brake arm 7, and a plurality of bowed spring arms 12 connected to the collars 9 and 10 and weighted between their ends by means of weights 13. ,It will be obvious that the governor will tend to partake of and amplify any vibrations of the motor 1, and this tendency is very pronounced in the specific form of governor herein illus trated, due to the employment of the weighted spring arms 12. In order to prevent this tendency of the governor as much as possible, I provide suitable means, such as an cmlless helical steel spring l4, for em bracing the bowed spring arms 12, and which will remain in contact therewith no matter what the relative posit-ions of the spring arms. it will be apparent that any outward movement of any arm or arms 12 will be resisted by the spring l t, as such movement would expand the spring. Suit-- able means is provided for maintaining the helical spring i l. in proper position on the spring arms 12. This means, as shown, comprises a pair of illll'lS 15, each of which is formed with otl'sct ends 16 and 17, one end 16 being suitably secured to collar 9, as by a screw 18, which may also serve to attach one of the spring arms 12 to the collar, and the other end 17 of which contacts the spring 14.

Having now described my invention, what I claim as new therein and desire to protect by Letters Patent is as follows 1. The combination with a centrifugal governor having a plurality of outwardly movable weighted arms, of means unattached to but embracing and contacting said arms for preventing vibrations of the governor, substantially as described.

2. The combination with a centrifugal governor having a plurality of outwardly movable weighted arms, of a spring unattached to but embracing and contacting said arms for preventing vibrations of the governor, substantially as described.

3. The combination with a centrifugal governor having a. plurality of outwardly movable weighted arms, of an endless helical spring unattached to but surrounding and contacting said arms for preventing vibrations of the governor, substantially as described.

4. The combination with a centrifugal governor having a plurality of outwardly movable weighted arms, of an endless helical spring unattached to but surrounding and contacting said arms, and means for maintaining the spring in position on said arms, substantially as described.

5. The combination with a centrifugal governor having a plurality of outwardly movable Weighted spring arms, of an endless helical spring unattached to but surrounding and contacting said spring arms for preventing vibrations of the governor, substantially as described.

6. The combination with a centrifugal governor comprising a shaft, a loose collar and a fixed collar mounted thereon, a plurality of spring arms connecting the collars, and weights carried by the spring arms intermediate their ends, of an endless helical spring surrounding and contacting the spring arms between the weights and the nxed collar, and means attached to the fixed collar for retaining the endless spring in position on the arms, substantially as described.

7. The combination with a centrifugal governor comprising a shaft, a loose collar and a fixed collar thereon, a plurality of bowed spring arms connected at their opposite ends to the collars, and weights carried by the spring arms intermediate their ends, of an endless helical spring surrounding and contacting the spring arms between the weights and the fixed collar, and a plurality of members secured to the fixed collar and engaging the endless spring to properly position the same, substantially as described.

8. The combination with a centrifugal governor comprising a shaft, a loose collar and a fixed collar mounted thereon, and a plurality of outwardly movable weighted arms connecting said collars, of an endless spring surrounding and contacting the weighted arms, and means attached to one of said collars for retaining the endless spring in position on said arms, substantially as described.

This specification signed and witnessed this 16th day of August 1912.

NEWMAN H. HOLLAND.

Witnesses WVILLIAM A. HARDY, ANNA R. KLEHM.

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

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