US1997099A - Timer for leer loaders - Google Patents

Description

April 9, 1935.

A. w. BEESON TIMER FOR LEER LOADERS Filed Feb. 12. 1952 2 Sheets-Shet 1 April 9, 1935.v A. w. BE ESON 1,997,099

v I TIMER FOR LEER LOADERS Filed Feb. '12 1932' 2 Sheets-Sheet 2 ,Arihur W jBeesofi mmm 0 F a Patented Apr. 9, 1935 (UNITED STATES PATENT OFFICE 1,991,099 I rum-1a roe LEER LOADERS I Arthur W. Beeson, Washington, Pa., assignor to Hazel-Atlas Glass 00., Wheeling, W. Va., a corporation of West Virginia I Application February 12,1932, Serial No. 592,623

9 Claims. (01174-169) horizontal dimensions of the ware, and the present' invention comprises a very simple timing mechanism which may be associated with any type of leer loader and which will time-the operation of the loader in accordance with the number of pieces of ware made on the forming machine.

A further object of the invention consists in a timing device which by the mere raising or lowering of a calibrated rod will cause a leer loader to operate after the formation of any selected number of pieces of Ware. v

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawings, in which, y

Figure 1 is a fragmentary side elevational view of aleer and leer loader with the novel timing device connected'therewith.

Figure 2 is an enlarged perspective view of the timing mechanism.

Figure 3 is an end view' of the timer, showing in dotted line the position of the parts when releasing the motor for operation, and,

Figure 4 is a horizontal sectional view taken on line 4-4 of Figure 2.

Referring to the drawings in more detail, the

numeral I indicates generally a leer for annealing glassware, only the forward portion of the leer in which the glass enters being shown. Mounted on top of the leer is a base plate 2 for supporting a leer loader of the pusher bar type. The present invention is in no manner limited to use with a certain type of leer loader, but for purposes of illustration there is shown the leer loader disclosed in the patent to Covey No..1,839,3'75, granted January 5, 1932.

While the leer loader per se forms no part of the present invention a brief description of its construction will be made in order to fully disclose the purpose and function of the timing device to which the present application is directed.

Pivotally mounted on a Bracket 3 secured to the base plate 2 is a frame 4.- This frame is provided ed a rod 6. This rod has pivotally secured at its provided with a roller 24 is mounted on the shaft with pairs of rollers 5,- in which is slidably mountouter end a dependingarm l on the lower end of which is secured a pusher bar 8.

Adjustably mounted on the rod 6 is a link 9 which has its opposite end pivotally connected to a crank arm I0 journaled in a bracket H mounted 5 on the base plate 2. This crank arm is driven by a sprocket chain I 2 to which power is transmitted by a sprocket wheel l3 driven from a motor l4 (Figure 2).

As will be readily understood, all of the ware 10 v to be projected into the leer in a particular movement of the pusher bar is not always placed directly in alignment therewith. For this reason a sidepusher bar I5 is provided. This barv I5 is' pivotally connected to the upper end of a link I6 which has its lower. 'end pivoted to-the side of the leer. A' crank I1 is joumaled to' the side of the v leer as indicated by the numeral l8 and has one "of its anns pivotally connected to the auxiliary pusher bar IS; A link I9 is journaled tothe other arm of the crank l1 and has its opposite end connected to a bell crank lever 20 pivoted on the upper forward end of the leer l as indicated by "numeral 2|. A link 22 connects this bell crank to the rocking frame 4 heretofore mentioned. It will be understood, therefore, that between the several reciprocations of the pusher bar 8 toward and from the leer, the auxiliary pusher bar will. be operated through the motion of the frame 4 to project any improperly placed ware into the 30 .path of the pusher bar. I In order to raise the pusher barB after it has drawn a line of ware into the leer, an arm 23 carrying the crank In. As the'crankifl moves in a clockwise direction to pull the pusher bar 8 toward the mouth of the leer, the rod 6 is of course drawn to the right (Figure 1) and the roller 24 is arranged to contact the free end of the rod 6 and depress it thereby raising the pusher bar just as it reaches its innermost position. Continued movement of the crank arm I0 and the arm 23 lifts the roller 24 from the rod 6 and thus allows the rod and carriage 4 to return to normal horizontal position and brings the pusher bar 8 into position for projecting another line of ware into the leer.

In the raising and lowering of the pusher bar in this type of leer loader, it is desirable that the bar be raised in as nearly a vertical plane. as possible so as to avoid interference with other ware being brought forward to be carried into the leer on the next operation of the pusher bar. I To (this end the arm I onwhich the pusher bar is mounted'is provided withan extension 25 above itspivotal J point with the rod 0. Pivotedtothis extension of tions of these parts are such that after the pusher a clamp 43.

- bar has completed its inward movement. to push the ware into the leer and starts back again, the cam II will engage the roller 30 giving a quick forwardmotion to the arm 21 and thus rocking the arm I about its pivot with the rod 6. This .combined movement, namely, the rockingupwardly of the arm I through the depression of the carriage 4 and the rocking of the arm I about its pivot by engagement of the cam 3| with the roller 30, will cause the pusher bar to be raised.

initially in a substantially vertical plane thereby avoiding any tendency to knock over ware being brought into position to be subsequently operated upon by the pusher bar. A spring 32 is connected to therod 6 and the extension 25 of'arm I so as to return the arm to substantially right angular relation to rod 8 after the cam 3| leaves the roller r The cam shaft of a conventional forming inachine is indicated by the numeral 33 and is provided with a gear 34 meshing with a gear 35 on a vertical shaft l6. This shaft has fixedly secured thereto, a 31 for cooperation with cam rollers 38 on a lever 10., A plate. provides the support for the lever 39 on which it is pivoted as by means of a bracket 4|, and the plate isin turn supported on a base plate 42. Plate 40 is circumferentially adjustable onthe base plate42 and may be secured in any adjusted position by means of Also mounted on plate 40 is an air valve 44 of the piston and cylinder type, and provided with a piston rod 45 connected to the lever 39. Air under-pressure is supplied to the valve 44 by conduit 46, and conduits 41 and 48 lead from the valve to opposite ends of an air cylinder 49. .This

cylinder is more clearly disclosed in Figure 2 ofthe drawings and will be described more in detail in ,the pusher bar between its cycles of operation,

will now be described.

Associated with the motor I4 is a gear box 50, and keyed to the shaftthereof is a gear wheel ii. The sprocket wheel 13 which drives the chain i2 is loosely mounted on the shaft of gear wheel 5i, and its hub- 52 has pivoted thereon a pawl or clutch member 53 provided with a pin 84; The

pawl serves as a clutch for connecting the continuously rotating gear wheel 5| with the'sprocket wheel 13, and a spring 55 is adapted to force the tooth of thepawl into engagement with theiteeth of the gear wheel. i

, Aften the sprocket wheel It has made a complete revolution it is'thrown out of gear with the motor by means of an arm 56 pivoted to a base plate 'as indicated by numeral 51. This arm is forked at its upper .end, one of the prongs of the fork being indicated by the numeral 88 and having its free end positioned inwardly of the pin 54 on pawl 88. It will be. understood therefore that when the arm 56 is in operative position, the pin 64 will ride up onto the arcuate prong ill and withdraw the tooth of the-pawl from engagement with the teeth of the gear wheel as indicated in Figure 2. It will also be noted that this construction provides a. positive means for withdrawing the clutch and positively maintaining it in inoper ative position, so that there is no possibility of the clutch becoming worn by riding against the teeth of the gear. a

The other prong 50 ofthearm I6 is connected with a link 00 which is in turn connected with a bell crank lever OI pivoted to a bracket on the main frame of the timing mechanism. A spring 83 having its ends fastened to the gear box and to the arm 58, serves to'return the arm to operativeposition'after each release of the pin 54.

cated by the numeral 84, and mounted therein for vertical adjustment is a rod 65. The rod 65 is provided with anangular projection 66 on its lower end, and is, therefore, substantially L- shaped in design. The rear edge of this L-shaped member is provided with a plurality of ratchet teeth 61, and a spring pressed pawl 68 pivoted to the frame 64 serves to hold this L-shaped membet in various vertically adjusted positions. vSlidably mounted'in the frame 64 is a ratchet bar 69 normally supported at its lower end by the angular extension 66 of the L-shaped member 65. It will be apparent, therefore, that the lowe'n limit of movement of the ratchet bar 89 will depend entirely upon the vertical position of the L- end of the cylinder. The pawl I I also coacts with the teeth of the ratchet bar and serves to lock the bar after each the pawl Hi. V

This step-by-step movement of the ratchet bar 69 continues until such time as the upper-end of the ratchet bar engages the overhanging portion 13 of a-plate I4. The last step of the ratchet bar raises this plate 14 and its over-hanging portion I2, which it will be noted is in contact with the horizontal arm of the bell crank lever 6|. This movement rocks the bell crank lever about itspivot and thus through the medium of link withdraws the arm 56 from the pin 54, thereby permitting the pawl to engage the continuously rotating gear wheel 5| and 'cause'sprocket wheel ii to drive thechain l2, thereby setting the leer loader in operation.

It will be remembered I mitting air to the opposite ends of the cylinder 49 is connected with the valve shaftof the'formingv The pawl 10 is pivotally.

The main frame of the timing device is indi-' upward movement thereof by that the valve for admachine and these parts" are'so designed that the pawl III is caused to reciprocate once for each article formed on the forming machine. v

.It will be apparent, therefore, that the vertical adjustment of the L-shaped member which determines the lower limit of the ratchet bar 68,

will determine the number of articles which are projected into the leer, at each operation of the her loader, and it will be noted that indicia 15 on the upper end of the L-shaped member permits a ready adjustment of the member in accordance with the number of articles to be pro- :lected into the leer in each operation.

It is essential, of course, after the plate It is raised to rock the bell crank lever 6| so as to set the leer loaderin operation, that it be released so as to allow the resetting of the arm 56 to again disengage the pawl after one cycle of operation of the leer loader. Nevertheless, the bell crank niust not be released so rapidly as to permit the spring 63 to return 'the arm 58 to operative po-- frame of'the timing device. Pivoted to the lower end of the plate 14, as indicated by numeral 18-, is a late 80 which'has its upper end. extending into a beveled slot H formed in cross bar 82 of the frame structure. As the plate 14 is raised by the last upward step of the ratchet bar, it is cammed slightly to the right thereby rocking the shorter plate 80 in a counter-clockwise direction about its pivot 19. The lower end of the plate 80 is thus disposed over the pawl III which is in raised position at this particular moment, whereby the pawl temporari ly supports the plate I4 to hold the arm 58 in releasing position. This lateral movement of the plate "also serves to move the pawls Ill and H out of engagement with the ratchet bar 69, thereby allowing the latter to drop to its lowermost position where it is supported on the angular extension 68 of the L-shaped member 65. When air is again admitted to the upper end of the cylinder 49 to retract the pawl 10, the latter will, of course.

disengage the projecting end of the plate 80 and the parts will return to'normal position as indi cated in Figure 2. The operation of the device has been fully described in connection with the description of the details of construction and need only be briefly.

repeated. The phase of operation between the forming machine and the pusher bar may be adjusted by a suitable adjustment of the plate 40 with respect to theplate 42, as this permits a relative movement between the cam of the forming machine and the cam rollers of the lever 39 which operates the valve for controlling the operations of the cylinder 48. The timing of the operation of the pusher bar with respect to the number of articles formed on the forming machine is controlled entirely by the vertical position of the L-shaped arm inasmuch as this member controls the lower or initial position of the ratchet bar and thus determines the number of upward impulses which must be applied to the ratchet bar before the same will cause the bell crank lever 6! to be operated to disengage the pawl 53. The release of the pawl 53 allows the same to engage the gear wheel SI which is continuously operating and which will, therefore, cause the sprocket wheel I! 'to make a complete revolution and thus rotate the crank arm ill to cause a complete cycle of operations of the leer loader. After the gear wheel II has made a complete revolution, the pawl is dutcmatically disengaged therefrom by the arcuate prong 5d of the arm 56. The too rapid springing back of the arm 58, after it has been released from the pawl bythe upward movement of the I ratchet bar 88,-is prevented by the plate 14 which tlon by reason of the lower end of the plate so engaging the pawl I0; the plate Ill being canted into operative position by reason of the lateral movement of the plate 14 which is caused by the action of the cams 16 riding over the cam-surfaces H of the plate. ll. These parts are returned to the normal position just as soon as air is supplied to-the upper end of the cylinder 49 to bring the pawl 10 to its lowered position.

From the foregoing description taken in connection with the accompanying drawings, it will be seen that I have provided a rather simple construction of timing device for leer loaders and similar appartaus; that it may be'readily installed on any such devices regardless of their particular construction; that means is provided for ad Justing the timing device to cause the leer loader to operate after any desired number of articles have been formed; and that this adjustment may are intended to be included within the scope of the appended claims. Moreover, the term clutc as used in the claims is intended toinclude any device for setting in operation the driving mechanism for the leer loader.

What I claim is: 1

1. A timing device for operating a clutch for leer loaders including a vertically movable member for rendering the clutch operative; a bar movable vertically stepby-step .to engage and elevate said member, means operated by the movement of said member for resetting the bar by gravity, means maintaining said member in its elevated position while the bar is being reset, and means for subsequently dropping said member.

2. A timing device for operating a'clutch for leer loaders including means for rendering the clutch operative; said means including a ratchet bar, a cooperating pawl for imparting a step-bystep movement to the bar, a member on which said bar is supportedyand a pawl and ratchet for supporting said member in various adjusted positions.

. 3. A timing device for operating a clutch for leer load'ers including means for rendering the clutch operative, said means including a vertically disposed ratchet'bar, a cooperating pawl for imparting a step-by-step movement to the bar, an L-shaped member on which said bar is slidably supported, and a pawl and ratchet for supporting said member in various adjusted positions. U

4. A timing device for operatinga clutch for leer loaders including means for rendering the clutch operative, said means including a move ably mounted plate and a ratchet bar associated I therewith, a pawl cooperating with the ratchet bar for imparting a step-by-step movement thereto, said bar engaging and moving the plate to render the clutch operative, means for moving' movement thereto; said bar engaging and moving the plate to render the clutch operative, means for moving the plate laterally to release the pawl, means tor varying one limit or movement of the bar, and means-for maintaining the plate in clutch-releasingposition for an appreciableperiod of time. l

6. In a timing device a vertically movable plate, a ratchet bar adapted to raise said plate, va. cooperating pawl ior imparting movement to the ratchet bar, and a cam cooperating with the plate for biasing said plate laterally to disengage said pawl from the ratchet bar. a

7. m a timing device a vertically movable plate, a ratchet bar adapted to raise said plate, a cooperatingpawl for imparting movement to the ratchet bar, a cam cooperating with the plate for biasing the plate laterally to disengage said I pawl from the ratchet bar, and a pivoted arm" carried by said plate and adaptedto engage said plate for biasing the plate laterally to pawl to momentarily support the plate after the ratchet bar, an adiustably mounted supp rt for the ratchet bar, and a cam cooperating with the disengfii the pawl from the ratchet bar.

9. In a timing device-a vertically movable plate, a ratchet bar adapted to raise said plate, a cooperating pawl ior imparting a step-by-step movement to the ratchet bar, an adiustably mounted support for the ratchet bar, a cam cooperating with, the plate for biasing the plate laterally to disengage the pawl from the ratchet bar, and a pivoted arm carried by said plate and adapted to engage said pawl to momentarily sup-- port the plate after the ratchet bar has been released.

. ARTHUR W. BEESON.

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