US258784A - Speed-regulator - Google Patents

Description

(No Model.

2 sheetssheet 1,

P. T. MALLON.

SPEED REGULATOR.

Patented MaJy 30, 1882.

Ira 12831 Wahzayses (No Model.) 2 Sheets-Sheet 2. F. T. MALLON.

SPEED REGULATOR.

No. 258,784. Patented May 30, 1882.

MYIIaSSQS Unwrap STATES ATENT FRANCIS T. MALLON, OF PAWGATUOK, CONNECTICUT.

SPEED-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 258,784, dated May 30, 1882.

Application filed April 14, 1882.

To all whom it may concern Be it known that I, FRANCIS T. MALLON, of Pawcatuck village, in the town of Stonington, county of New London, and State of Connecticut, have invented certain new and useful Improvements in Speed-Regulators, of which the following is a specification.

My invention is applicable to all machines in which it is desired to maintain a certain set speed, and in which the speed is varied by shifting the driving-belt upon reversely-coned pulleys or drums.

The invention consists in the combination, with reversely-coned pulleys or drums and a driving-belt thereon, of a worm or screw arranged transversely to the belt and receiving the same between the convolutions of its thread, and adapted to shift the belt by its rotation, a rotary governor or regulator deriving motion from the driven pulley or drum and adapted to turn said worm or screw to reduce the speed when the speed of the driven pulley or drum exceeds that desired, and means for turning said worm or screw in the reverse direction to increase the speed of the driven pulley or drum when the speed of the latter falls below that desired. The means employed for turning the worm or screw to increase the speed may consist of a spring or weight, which is wound up by the rotation of the worm or screw produced by the rotary governor or regulator or by a second rotary governor or regulator adapted to operate by a decrease in speed instead of an increase.

The invention also consists in a rotary governor or regulator of novel form, combined with the driven cone, pulley, or drum and the worm or screw, as particularly hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a plan view of a driving mechanism embodying my invention. a partial side view thereof. Fig. 3 represents a longitudinal section of my improved governor or regulator. Fig. 4 represents aface view of the casingthercof, with the cover removed. Fig. 5 represents a sectional view of the cover of the case detached. Fig. 6 represents a transverse section of the governor-regulator when inoperative. Fig. 7 represents a corresponding view, showing the parts in the posi- Fig. 2 represents (No model.)

tion which they occupy when rendered operative by too great speed; and Fig. 8 represents a plan of a driving mechanism wherein a second governor or regulator is employed to turn the worm or screw to increase the speed.

Similar letters of reference designate corresponding parts in all the figures. I

Referring first to all the figures except Fi 8, A B designate reversely-coned pulleys or drums, the shafts A B of which are mounted in bearings in a frame, 0. The frame here shown is simply for the purpose of illustration,

and in whatever machine this driving mechanism is used the pulleys or drums and the other parts, hereinafter described, will be arranged as is most convenient or desirable. The pulley or drum A is the driver, and may receive motion from the prime mover by a belt or gearing, and such motion is transmitted by a belt, D, to the driven pulley or drum B.

E designates a deep-threaded worm or screw arranged adjacent tothe driven pulleyor drum B, and so arranged that it receives the driv ing portion of the belt D between the convolutlons of its thread. Consequently it will be seen that by turning the worm or screw in one direction the belt D will be shifted ontoa larger portion of the driven pulley or drum B, and the latter will be rotated at aslower speed, while by turning the worm or screw in the opposite direction the belt will be shifted onto a smaller portion of the drum or pulley contained in a eylindric case, G. In the case G are holes or openings through which dogs a are caused to protrude by the rotation of the regulator at a speed greater than that desired, as hereinafter fully described, and when said dogs are thrown out they comein contact with the teeth of the wheel E, and turn the worm or screw E to shift the belt on a larger part of the pulley or drum B, and thus lessen the speed of the latter.

H designates a coiled spring applied to the worm or screw E, and by the above-described turning of the worm or screw this spring is wound up more or less, and when the worm or screw is no longer rotated by the regulator said spring will rotate it in the reverse direction more or less and return the belt to that portion of the pulley or drum at which it should be to givethr set speed of thelatter. In practice the regulator and the spring H are both so adjusted relatively to each other that the worm or screw will not ordinarily be turned to any great extcnt,-aud the regulator and spring will approximately counteract each other.

I will now describe the internal construction of the governor or regulator, referring more particularly to Figs. 3 to 7, inclusive.

The case G is secured fast upon the shaft B, which projects through said case, and the front of the case is closed by a removable cover, G, which may be taken off to gain access to the internalmechanism. \Vithin the caseisa hub, b, which is loose upon the shaft B, and has the dogs a connected with it by links 0, as clearly shown in Figs. 6 and 7, so that the dogs are caused to protrude from the case by turning the said hub slightly in one direction, and are retracted within the case by turning saidhub in the opposite direction. The hub b has upon ita projection, b, towhich is attached securely an arm,d, which projects through a slot, d, in the ease G, and may be weighted at the outer end, as shown in Figs. 1, 2, 6, and 7.

On the shaftB, in frontofthe hub b, is loosely titted a sleeve. 6, which projects through the cover G, and has attached to it, outside the cover, aratchet-whecl, c, with which engages a-pawl, secured to the cover G. Upon the inner end of the sleeve 0 is a radial arm, 0 and between the arm 0 and the projection I) on the hub bis arranged a spiral spring, f, bent into are-shaped form and guided and held by a guide-rod, f, which is fast in the projection b and works through the arm 0 The arm 6 forms an abutment for the springf to work against, and when the regulator is at rest the said spring presses against the projection b, and through it turns the hub b and keeps the dogs a retracted within the case G. The weighted arm it acts as a drag when the regulator is rotated, and when the speed of rotation increases beyond what is desired the drag of the weighted arm (1 overcomes the force of and compresses the springf, thereby turning the huh I) and causing the dogs a to protrude sufficiently to act upon the teeth of the wheel E, and thereby turn the screw or worm E to shift the belt D to give a slower speed. As soon as the speed sensibly diminishes the force of the spring f reasserts itself and moves back the arm (I sufficiently to rtraetthe dogs to within the case G.

7 From the foregoing description it will be evident that the speed which will be gained before the dogs a protrude and become active will depend entirely on the strength of the springf, and in order to set the regulator to allow a faster speed the sleeve 0 may be turned slightly to cause the arm or abutment e to compress the springf. The sleeve may be turned by applying a wrench to a square or polygonal hub, g, on the ratchet-wheel c, and the arm or abutment will be held tixed relatively to the rotary case G by the pawl engaging with the ratchet-wheel e. \Vhen it is desired to set the regulator for a slower speed the pawl e is raised out of engagement with the ratchet-wheel e, and the latter is allowed to move back a short distance, thereby weakening the springf.

Fig. 6 shows the relative position of the parts before the speed for which the regulator has been set is attained, and Fig. 7 shows theposition when the set speed is exceeded and the drag of the weighted arm d has thrown out the dogs a sufficiently to operate on the teeth of the wheel E.

Upon the body ofcase G is an inwardly-projecting flange, h, in which are notches h, (shown in Fig. 4,) and on the inner face of the cover G are radial ribs, 1 which are hooked or notched at the outer ends, so that when inserted through the notches h and turned they will engage with the flange h, and aid in bolding the cover Giu place. The ribs i form guides for preventing the outward displacement of the springf.

In lieu otthe spring H, a weight suspended from the worm or screw shaft might be used with equal advantage.

Referring now to Fig. 8, it will be seen that the arrangement of the eoned pulleys or drums AB, the belt D, the worm or screw E, and the regulator G, is the same as previously described; but instead of employing the spring H or its equivalent weight to impart the reverse rotary motion to the worm or screw E, I employ a second regulator, G,which is mounted on an independent shaft, and is driven by a crossed belt, I, from a pulley, I, on the shaft B. The dogs a of the second regulator, G, engage with a wheel, E on the worm or screw E; but instead ofthe wheels E E being toothed, they are represented as having smooth peripheries, and the dogs a act upon them by friction. The internal construction of the second regulator, G is exactly the same as that of the regulator G, but the springf in the regulator G is set so weak that when the regulator is running at or above the set speed the weighted arm cl will hold the spring fully compressed, and the dogs are so connected with the hub 11 that they will be fully retracted. WVhen the regulator is running below the set speed the springfwill expand, moving the arm (1 and throwing out the dogs a.

In lieu of the particular kind of regulator here shown, I may use with the worm or screw a rotary regulator of other construction.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination,with reversely-coned pulleys or drums and a driving-belt thereon, of aworm or screw arranged transversely to the belt, and receiving the latter between the convolutions of its thread, a rotary governor or regulator deriving motion from the driven pulley or drum, and adapted to turn said worm or screw in one direction, and means applied to said worm or screw for turning it in the opposite direction, substantially as and for the purpose herein described.

2. The combination,with reversely-coned pul leys or drums and the driving-belt thereon, of the worm or screw provided with a wheel, the rotary governor or regulator provided with dogs, which are adapted to engage with the wheel upon said worm or screw for turning the latter in one direction, and means applied to said worm or screw for turning it in the opposite direction, all arranged and operating substantially as herein described.

8. The combination,with reversely-conedpulleys or drums and a driving-belt thereon, of the worm or screw, a rotary governor or regulator adapted to turn said worm or screw in one direction, and a spring or weight applied to said worm or screw for turning it in the reverse direction, all arranged and operating substantially as herein described.

4. Thecombination, in a rotary speed governor or regulator, of a case and a shaft extendingthrough the same, a radial arm mounted loosely on said shaft and forming a drag, a spring supporting said arm on one side, and dogs connected with said arm and adapted to be thrown ont'by the backward movement of said arm against the force of said spring, substantially as herein described.

5; The combination, with the case G and shaft B, of the drag-arm d, and its attached dogs a, the bent springf, and the arm 0 forming an abutment for said spring, substantially as herein described.

6. The combination, with the case G and shaft B, of the drag-arm d, and its attached dogs a, the loose sleeve 6, carrying the ratchetwheel 0, and the abutment-arm 6 the pawl 6 and the spring f, arranged between the arm d and abutment-arm 6 all substantially as herein described.

FRANCIS T. MALLON.

Witnesses:

OWEN McGowan, JOHN MALLoN.

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