US1834209A

US1834209A - Speed control device

Info

Publication number: US1834209A
Application number: US237781A
Authority: US
Inventors: Elmer E Harper
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-12-05
Filing date: 1927-12-05
Publication date: 1931-12-01
Anticipated expiration: 1948-12-01

Description

Dec. 1, 1931 E. E. HARPER SPEED CONTROL DEVICE 2 Sheets-Sheet 1 Filed Dec. 5, 1927 r 6 f a ATTORNEY Dec. 1, 1931. I E. E. HARPER 3 SPEED CONTROL DEVICE Filed Dec. 5, 1927 2 Sheets-Sheet 2 47 IIIIIIIIIIIIIIIIII l/{IIII/{IIII/IIIIIII/A H IIIIIIIIHIM N 24 \W 4 mulllllllllllllllmgy INVENTOR Li/mer 5 Harper ATTORNEY 7 delivery embodying -my invention shown Patented Dec. 1, 1931 ELMER E. HARPER, OF SAS CITY, MISSOURI srnnn CONTROL DEVICE Application filed December 5, 1927. SeriaI No. 237,781.

My inventionv relates to material feeding machines and more particularly to means for controlling the delivery of a constituent such as lime or other powdered material to a container such as a tank for producing a solution or mixture; the present invention constituting an improvement on the machine forwhich Letters Patent of the United States No. 1,616,970 were issued to me on February 8, 1927, and having for its principal objects to provide automatic control of material delivery means, to deliver portions of material at intervals which may be increased or reduced in regular progression to provide a wide range of delivery intervals, and to provide automatic-control of the measuring factor responsive to the amounts of water to be treated.

In accomplishing these and other objects of the inventionI have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein: I

' Fig. 1 is a verticalsectional view of a machine having mat'erial-delivering elements, and provided with means for controlling the partly in section; v p H I V Fig. 2 is an enlarged central'section of the reduction gear and proportional feed device, and upper portions of associated elements.

Fig. 3 is a cross section on the line 33,

Fig. 2, including a 'plan, view of peripheral tloned on the upper end of the tubular shaft portions of the elementsi 1 Fig. 4 is an elevation of related disks and a pawl for rotating intermittently a ratcheted diskfor measured actuation of deliveryelements.

Referring in detail to the drawings:

1 designates a solution tank having a water inlet 2 and an outlet 3,-and 4 is a bin erected on the tank having a-hopper 5 through which dry material may be introduced into the bin, a bottom plate 6 of the bin having apertures 7 through which material is delivered from the bin to tables 8 suported by the tank, a disk 9 having peripheral U-shaped notches 10 be ing rotatable as presently described over the bottom plate for intermittent coincidence of notches with the openings for control of,

pin 31 fixed radially in the rod 12, whereby delivery of the material to the tables. The

material deposited on the tables is removed therefrom for delivery to a position for use,

and shown as being delivered into thesolution tank to provide a solution, by an arm 11 movably keyed to the lower end of a rod'12 extending upwardly through the bin, the shaft being supported and actuated in a man- .ner presently described. 7

Covering the top of the bin is a plate 13 having a laterally extending shelf portion 14, and fixed to the plate by bolts 15 is a housing element 16 having an annular upstanding gear-enclosing flange 17 and a gear-supporting body portion 18 provided with a shaft journal 19 on which are supported, adjacentthe journal opening, annular thrust bearings 20 for rotatable support of a gear wheel 21.

A tubular shaft 22 in which the rod 12 is rotatably and slidably mounted extends rotatably through said bin bottom 6 and housing 18, and is keyed to said gear wheel 21 by a screw 23 for continuous rotation by said gear wheel under actuation of the same by a worm 24 rotated from a pulley 25 by a motor 26 positioned on said shelf 14.

The rod 12 extends beyond both ends of the tubular shaft 22, the arm 11 being attached to the lower end of the rod in spaced position from the lower end of the tubular shaft and the upper end of the shaft being threaded.

A disk 27 having an axial collar 28 is posiwhich is rotatable therein, and the rod 12 extends through the disk and collar and is sup ported on the collar by a nut 29 engaged with the upperend of the rod, the collar being provided with a vertical slot 30 to receive a the disk when intermittently rotated as presently described may cause the rod to rotate, and whereby the rod 12 may be elevated or lowered to space the arm 11 from the tables 8.

Means for supporting and intermittently rotating the disk 27 include a plate 32 sup ported by the upstanding flange 17 of the housing, having a hub 33 in which the tubular shaft is rotatable, and an upstanding semicircular peripheral flange or pawl track 34,

the plate being fixed to the housing in permanent position and may be integral therewith; and a pawl disk 35 keyed to the tubular shaft as at 36 having a hub '37 whereby it is a plurality of ratchet teeth 42 adjacent its periphery on its under surface, and a pawl disk is p-rovided with pawls 43 pivotally mounted radially on its periphery having short fore armsor teeth 44 and relatively long rear arms or weighted ends 45, the pawl disk being so positioned that the pawls normally pivot so that the teeth engage the ratchet teeth of the disk. I

' The pulley disk38 is adapted for rotation to a desired position by means which are prefrotating tubular shaft;

erably illustrated as a chain 46 extending in a peripheral roove 4? of the pulley disk.

The pawl disk is rotated by the constantly The elements are provided so that the pawls ride on the semicircular track of the plate 34 over a part of their rotation and during the remainder of their rotation, the weighted ends of the pawls are permitted to drop close to the normal surface of the plate and while the pawls are in this position, the tooth ends are permitted toengage the ratchet disk to rotate the same. The semi-circular flange or track 41 of the pulley di k is also adapted to support the weighted end of a pawl, and when the pulley diskis in such a position that the track or flange 41 fully registers with the track 4,

the pawl rides on thetwo tracks coincidently and is restrained from engaging the ratchet only over such pats. hen the pulley disk is rotated so that its track 41 does not fully register with the track 34, the'pawl is restrained from engagement with the ratcheted disk not only during its travel over the track 34 but additionally during travel over the portion of the flange 41 that extends beyond the semi-circular position of the track 34, whereby a shorter arc of rotation is pr'ovided in vlvhich the pawl is engaged with the ratchet dis i. i

A plurality of pawls is preferably provided and at diametrically opposite positions on the pawl disk so that when the pulley disk track 41 registers with the track 34, substantially continuous engagement of the pawls with the ratcheted disk is provided.

I provide means for indicating the osition of the semi-circular pawl track 0 the pulley disk comprising a scale 49 on the track 41 and an arrow 50 on the similar track 34 of the plate whereby the pulley disk may be rotated to indicate a particular position of -spikes.54 projecting adjacent the walls of the bin for dislodging material therefrom.

' A shoeelement' may be provided as shown, attached to a stationary part. such as the plate 32, having a 'shoe56f adapted to overlie the ratchet disk and engage it frictionally to serve as a brake forrestraining the ratchet disk against casual movement by the tubular shaft. i i

V A weight may be attached to one end of the chain and a float may be attachedto the other end whereby the changes in elevation of a water surface may control the rotation of the disk to regulate the function thereof, as

now to be described; the pulley being also manually operable.

In operating the device, the'pulley disk is set, for example manually, so .thatthe track of the disk does not exactly coincide with the track of the plate disk, an end of the pulley disk track extending beyond the plate disk track. A pawl will be supported out of engagement with the ratchet over 180 degrees of its rotation by the plate disk track, and will be further supported by the extending portion of the track of the pulley disk over an additional number of degrees. The pawl will therefore be permitted to pivot to engage and cause rotation of the ratchet disk and the rod, over a relatively short are, whereby the material-delivering arm of the rod is moved over a relatively short are of its circular path, to perform its function of removing material from the table. The number of material-removing operations performed during asingle complete rotation of the ratchet disk 27 audits driven-rod 12 is governed by ,the'number of projecting arms 11, tables 8 andicorresponding vorifices 7.

The number of rotations of the ratchet disk will also be in ratio to the number of rotationsof the tubular shaft, the ratio being gpverned by the arc in which the'pawl teeth are engaged with the ratchet disk.

A very large number of changes in the relation between the constant rotations of the tubular shaft and the intermittent rotations of the arm are possible, whereby the intervals between deliveries of material by the arm may be varied for delivering small or large quantities of the material to the waterto be treated, or forsupplying'the materials to flowing water at desired spaced intervals.

What I claim and desire to secure by Letters Patent is: j

1. In a machine of the character described, in combination with a continuously moving tubular member, a rod slidably mounted in the tubular member and a ratchet disk keyed to said rod, a pawl, means rotatable by said tubular member supporting the pawl for norma-l engagement with said ratchet disk for rotating the same, and means adjustably movable over the tubular member for pivoting the pawl out of ratchet engaging position.

2. In a device of the character described including a frame and a driving shaft, a driven ratchet movably mounted on said shaft, a pawl revoluble by the driving shaft normally engaged with the ratchet, a cam member fixed to the frame for pivoting the pawl out of ratchet engaging position, and a movable member supported by the frame having pawl-pivoting portions and adapted for movement to pivot the pawl in positions adjacent said cam member.

3. In a machine of the character described, a support, a tubular shaft rotatable in the support, a rod rotatably mounted in said tubular shaft, a disk having a marginal ratchet rotatably mounted on the tubular shaft and keyed to the rod, a plate having an upstanding flange fixed ,to the support, a second disk having a limited flange and rotatable adjacent said plate flange, and a pawl adapted for rotation by said tubular shaft and normally engaged with the ratchet teeth of said first named disk and pivotal by said flanges out of engagement with said disk.

4. In a machine of the character described comprising a frame, a tubular shaft, supported by the frame, and a rod movable in the tubular shaft, a ratchet having an annular series of teeth keyed to the rod for rotating the same, a pawl movable in a circular path by the shaft in engagement with the ratchet, and means for pivoting the pawl out of ratchet-engaging position including a cam element positioned in the path of the pawl comprising a fixed member and a movable member adapted for adjustably lengthening the effective extent of the cam element.

support, a rod rotatably mounted in said tubular shaft and supported thereby, a disk havin ratchet teeth rotatably supported on the tu ularshaft, a plate having an upstand- 7. In a device of the character described, a

driven element, a ratchet connected with the driven element, means for operating the ratchet including a pawl-carrying member and a pawl pivoted on said member normally engaged with said ratchet, plural adjustable means for disengaging the pawl from the ratchet for releasing the driven element over measured portions of the track of the ratchet-operating means, one of said plural adjustable pawl-disengaging means having a surface provided wit a scale, and the other of said means being adapted to provide an indicator to cooperate with said scale for igdicating the disengaging adjustment there 0 8. In a device of the character described including a rotative shaft, a ratchet, and a pawl mounted on said shaft and engageable with the ratchet to move the same, means including a disk rotative on said shaft having an upstanding flange engageable by said pawl for disengaging the pawl from the ratchet.

In testimony whereof I afiix my si ature.

ELMER E. HAR ER.

5. In a machine of the character'described, I

a support, a tubular shaft rotatable in the support, a rod rotatably mounted in said tubular shaft, a disk having ratchet teeth rotatably mounted on the tubular shaft and keyed to said rod, a plate having a limited upstanding flange fixed to the support, a second disk having a limited flange and adapted for adjustable positioning adjacent said plate flange, and a pawl adapted for rotation by said tubular shaft and tiltable by said adjacent flanges for intermittently engaging the ratchet teeth of said first named disk to impart motion to said disk. 7 V

6. In a machine of the character described, a support, a tubular shaft rotatable in the