US689884A

US689884A - Spring-motor.

Info

Publication number: US689884A
Application number: US68789698A
Authority: US
Inventors: Eldridge R Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-08-06
Filing date: 1898-08-06
Publication date: 1901-12-31
Anticipated expiration: 1918-12-31

Description

No. 689,884. Patented Dec. 3|, l90l.

- E. R. JOHNSON.

SPRING MOTOR. (Application filed Aug. 6, 1898.)

(No Model.) 2 Sheets-$heet I.

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Patented Dec. 3|, 190i. E. R. JOHNSON.

SPRING MOTOR.

(Application filed Aug. 8, 1898.) (No Model.)

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ELDRIDGE R. JOHNSON, OF PHILADELPHIA, PENNSYLVANIA.

SPRING-MOTOR.

.SPECIFIGATZON forming part of Letters Patent No. 689,884, dated December 31, 1901.

Application filed August 6, 1898. Serial No. 687,896- (llo model.)

To aZZ whom, it may concern:

Be it known that I, ELDRIDGE R. J oHNsoN,a citizen of the United States, and a resident of the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Spring-Motors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

This invention has relation to certain improvements in spring-motors, and is particularlyadapted to gramophoncs and other sound recording and reproducing machines.

The main object of my invention is to provide a simple and compact motor which can be cheaply constructed and at the .same time have sufficient power to run light machinery, such as above referred to.

A further object of my invention is to provide an improved construction of bearings for the various spindles of my motor, whereby the friction of the same may be reduced and the running qualities greatly facilitated.

A further object is to provide animproved form of governor mechanism for maintaining an even and regular speed throughout its operation.

A still further object of my invention is to provide a novel and efficient adjusting means for the governor-spindle, whereby the lower bearing of said spindle can be quickly and easily adjusted with relation to its intermeshing gears.

With these and other objects in view my invention consists in the construction, combination, and arrangement of parts, such as will be hereinafter more fully described, and particularly pointed out in the claims made hereto.

In order to enable others skilled in the art to which my invention most nearly appertains to make and use the same, I will proneed to describe it, reference being had to the accompanying drawings, which form a part this specification, and in which- Figure 1 is a central sectional elevation of my improved motor, showing it provided with a casing and having a turn-table secured on the driving-spindle, such as is used in gramophone-machines. Fig. 2 is a cross-sectional viewtaken about on the line 2 2 of Fig. 1 and illustrating the arrangement of the gearing, the outer casing-being broken away at the ends. Fig. 3 is a plan view, the outer casing being in section and portions of the motorframe broken away for convenience in illustration. Fig. a is a detail front elevation of the speed-governor mechanism, also illustrating the governor-brake. Fig. 5 is a detail perspective of the eccentric bearing-plate for the governor-spindle.

In carrying out my invention I provide a box or casing A, such as is commonly used on machines of the gramophone type, in which is placed a motor-supporting frame consisting of an upper and lower plate a, connected at its corners by suitable tie-bolts a. Located centrally in one end of the supportingframe dis a winding-spindle B, provided with journal-boxes I) at its upper and lower ends, said boxes being rigidly secured in openings provided therefor in the frame a. The upper part of this spindle B is formed with an enlargement B, commencing slightly below its upper bearing, the upper edge of which forms a shoulder U.

Rigidly secured on the spindle B and resting on the shoulder b is a wheel 0, having on its face near its periphery a series of apertures cof equal distance apart and adapted to be engaged by the teeth of a gear-wheel D. This gear D is rigidly mounted on the inner end of a transverse]y-disposed shaft D, having a bearing at its inner end in a journalblock d, suitably secured to the frame a, and at its outer end in the side wall of the easing A and a bearing-plate d,which is secured on the inside of said casing A, as most clearly illustrated in Fig. 3 of the drawings. The 0 outer end of this shaft D projects beyond the wall of the casing A and is squared, as at 01 for the reception of an ordinary crankhandle. (Not shown.)

A spiral spring E is provided around the spindle B, having its inner end secured to the enlarged portion B of said spindle and its outer end to the tie-rod a. Directly below the spring E is a square plate 6, having an opening in its center which surrounds the shaft B, the said plate abutting against the shoulder 6 formed by the lower edge of the enlargement B. This plate 6 is prevented from turning with the spindle B by means of to be engaged by a spring-pawl a which is secured on the upper face of the gear F, so

that on the winding of the shaft B the gear F remains stationary, its pawl running loosely over the teeth of the ratchet-wheel e while on the backward rotation of said shaft B under=the action of the springE the ratchet and pawl e e are in engagement and the gear F becomes rigid with and revolves with the winding-shaft B.

'Located in the supporting-frame a in the rear of the spindle B is a spindle G, which carries on its lowerportion a rigid pinion g, which meshes with the pinion F on spindle B. Directly below the pinion g is a large gear'G, which is also rigid on the shaft G andmeshes with a pinion h, rigidly mounte on the driving-spindle I'I.

The driving-spindle II is provided at its lower ends with ball-bearings, journaledin the lower supporting-frame a, consisting of a cup 71, adapted to an opening in the lower. frame a,having a flange overlapping said opening and carrying in its cup portion 71 a series of balls 6 adapted to bear against the cone-shaped end-h of the spindle II; At the point where the upper portion of the spindle passes through the upper frame a I also provide ball-bearings, which consists of a cup j, similar in shape to the lower cup t and adapted to an opening provided in the frame around the spindle and having an overlapping flange. Balls 9' are located in the cup portion which bear against the cylindrical portion of the spindle II. On the upper end of this driving-spindle H is secured the turn-table K, which carries the record-disk in gramophonemachines. This turn-table may be rigidly secured to the driving-spindle in any wellknown manner, while I have shown it as having a depending hub 70, provided with a transverse slot 7t, adapted to. straddle a pin carried by the spindle II. The upper end of the spindle H is shown as provided with screwthreads for the reception of a lock-nut K, which securely locks the turn-table and clamps the record-disk between them.

On the lower end of the spindle H, directly below the pinion 71, is rigidly mounted a gear I, which meshes with a pinion I, secured on the lower end of the governor-spindle L. The governor-spindleL is journaled at its upper end in the frame a and at its lower end in art-eccentric bearing-plate M, carried by the lower "frame a. This plate M consists of a disk m, having a pivot-bearing m in the center of its upper surface adapted to receive the lower end of the governor-spindle, while on its lower side it has an eccentrically-located stud m adapted to the opening m provided in the frame a. A set-screw m passes through the edge of frame a and engages the stud m for securing it in position. Thus when it is desired to adjust the relation of the pinion I to its intermeshing gear I the set-screw m can be loosened up, and this easily accomplished by slightly turning the disk m.

Loosely mounted on the governor-spindle L is a sleeve Z, having formed integral with its lower edge a disk Z, and on the upper end of said spindle is a rigidly-secured collar Z having oppositely-projecting lugs or ears Z to which are pivoted the governor-arms Z having the'weights Z secured to their lower ends. The flat springs Z are provided'for each of the arms Z having their upper ends secured to the edges of said arms just below their pivots and their lower ends connected to the sleeve Z.

By my above-described construction and arrangements of arms Z and connecting springs Z I am enabled to produce a governor which will maintain a regular and uniform motion with almost thirty per cent. less speed than the governor now employed in this class of motors.

I have provided a brake for the governor which is very simple and cheap to construct and at the same time very efficient, and consists of a flat lever N, pivoted at n to the tierod a, having its inner end twisted at about right angles to the main part and extending above the disk Z. A rubber or leather teat n is provided in this and adapted to bear on the disk Z when properly adjusted. The long end of the leverN extends outwardly within a short distance of the wall of the outer casingA and is provided near said end with the coil-spring M, which tends to keep itnormally out of contact with the friction-disk Z on the governor-spindle. A horizontally-disposed stub-shaft 0, having bearings in the side wall of the casing A and the sideplates a is provided, carrying on its inner end a vcam 0, adapted to bear against the under side of the lever N, as clearly illustrated in Fig. 4: of the drawings. On the outer end of the shaft O is a spring-lever 0, provided with an operating handle or knob 0 the said spring lever acting as an index finger or pointer and bearing against a plate 0 which may have an index on its faceto denote the speed of the motor. Thus it will be readily understood IOC that by turning the lever 0 the shaft 0 is rotated and the cam 0 brought to act on the end of the lever N, which throws its inner end and teat it into frictional contact with the disk Z of the governor and enables the speed of the motor to be governed as may be desired.

In operation the winding-shaft B is turned through the medium of the transversely-arranged shaft D and its connecting gearing G D, which winds up the spiral spring E, which is connected at its inner end to said shaft and at its outer end to a fixed point. The unwinding of the spring E rotates the shaft B,

spindle, and a set-screw for holding the said block in its adjusted position.

2. The combination with the governor-spindle of a spring-motor, of an adjustable bearing for said spindle comprising a disk, m, having a concentric bearing m, adapted to receive the lower end of the spindle, a stud m secured to the lower side of said disk and located eccentrically thereto, the said stud being adapted to an opening inthe motor-frame, and a set-screw for maintaining the said stud in its adjusted position, substantially as described.

In witness whereof I have hereunto set my hand this 4th day of August, A. D. 1898.

' ELDRIDGE R. JOHNSON.

Witnesses:

BENJ. F. PERKINS, HORACE Pn'rrir.