US1002586A - Ingot-stripping mechanism. - Google Patents

Description

D. KENDALL. INGOT STRIPPING MECHANISM. APPLICATION FILED MAY 4, 1910.

Patented Sept. 5, 1911.

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D. KENDALL. INGOT STRIPPING MECHANISM.

APPLICATION FILED MAY 4, 1910.

Patented Sept. 5, 1911.

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D. KENDALL.

INGOT STRIPPING MECHANISM. APPLICATION FILED MAY 4, I910.

Patented Sept. 5, 1911.

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D. KENDALL. meow STHIPPING MECHANISM.

' APPLICATION FILED MAY4, 1910. I 4 1,002,586. Patented Sept. 5,1911.

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DAVID KENDALL, 0F ALLIANCE, OHIO, ASSIGNOR TO THE ALLIANCE MACHINE COMPANY, OF ALLIANCE, OHIO, A CORPORATION OF OHIO.

INGOT-S'IRIPPING MECHANISM.

Specification of Letters Patent.

Patented Sept. 5, 1911.

Application filed'May 4, 1910. Serial No. 559,371.

To all whom it may concern:

Be it known that 1, DAVID KENDALL, of Alliance, Stark county, Ohio, have invented a new and useful Improvement in Ingot- Stripping Mechanism, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation partly in section of ingot-stripping apparatus embodying my invention; Fig. 2 is a vertical section of a portion of the apparatus taken in a plane at right angles to the plane of Fig. 1; Fig. 3 is a top plan view; Fig. 4 is a detail view showing the connections for opening the tongs; Fig. 5 is a sectional View showing the clutch and change-gearing devices; Fig. 6 is a section on. the line VI-VI of Fig. 5; and Figs. 7 and 8 are detail views showing the connections for shifting the clutch and change gearing.

My invention has relation to ingot-strip ping mechanism, and is designed to provide mechanism of this class by means of which considerable saving of time may be effected in the operation of stripping ingots, and

which also provides a very much lighter and less expensive apparatus.

My invention comprises a novel arrange ment of the ingot stop or bull nose, a novel construction of the stripping devices and actuating gearing, means for operating the gearing at different speeds, and also means of novel character for opening the tongs which engage the ingot mold. These and other features of my invention will be best understood by reference to the accompanying drawings, in which I have shown the preferred embodiment thereof, and which will now be described, it being premised, however, that various changes may be made in the construction and arrangement of the various parts, by those skilled in the art, without departing from the spirit and scope of my invention, as defined in the appended claims.

Referring to these drawings, the numeral 2 designates the two girders of the usual movable crane bridge, upon which is mounted the carriage or trolley 3.

4c designates the motor and 5 the gearing by means of which the trolley is propelled back and forth on the bridge.

6 designates the ingot stop or bull nose, which is provided at its upper end with a screw threaded portion 7 passing through a stationary nut 8, which is journaled in the frame 9 of the trolley or carriage.

Secured to the upper end of the nut 8 is a bevel gear 10, whose teeth are engaged by the teeth of a bevel pinion 11, on a shaft 12, which is connected by gearing 13 with the armature shaft 14 of a reversible electric motor 15. By operating the motor 15 in the desired direction, the ingot stop may be raised or lowered as may be necessary to adapt it for use with ingot molds of dif ferent heights. The ingot stop remains stationary not only during the operation of stripping, or until the mold has been sulficiently released from the ingot, so that it can be stripped or carried entirely off the mold, but is also stationary during the remaining cycle of the operation. That is to say, after the stop has once been adjusted to the proper point for a certain height of molds, it remains fixed during the entire stripping operation. The stop is never screwed down against the ingot under pres sure, nor is this screw ever operated under pressure, save its own weight In so far as I am aware, this constitutes an important distinction between my improved stripping apparatus and stripping apparatus heretofore in use, in which a vertical movement of the ingot stop is necessary. By holding the ingot stop stationary in its adjusted or set position, a considerable saving of time is effected in stripping ingots and a very much lighter and less expensive construction of apparatus is rendered possible.

16 designates the tongs or grips for the ingot mold which are pivoted to a head or carrier 17, arranged to slide vertically on the ingot stop. These tongs are arranged to drop or close by gravity into lifting engagement with the usual lugs 17 on the ingot mold 18. They are opened by means which will presently be described.

The stripping apparatus comprises a reversible electric motor 19, which is mounted on the trolley or carriage and which is provided with an extended armature shaft, divided into the two sections 20 and 21. The section 21 of this shaft carries at its outer end a pinion 22, which meshes with a spur gear wheel 23, on a shaft 24, j ournaled in bearings 25, on the frame of the trolley, and carrying pinions 26, which mesh with spur gears 27 at opposite ends of a winding drum 28. The two end portions of the drum 28 are provided with right and left hand winding grooves 29 and 30. The two ends of a rope or cable 31 are connected to the respective end portions of this winding drum, and thence pass downwardly and are carried back and forth over a series of sheaves 32 and 33, the sheaves 32 being journaled on shafts 34 in the head 17, and the sheaves 33 being journaled on shafts 35, supported in a depending portion 36 of the frame of the trolley or carriage. From the winding drum, each branch of the rope 'or cable 31 passes down and back and forth over one set of sheaves 32 and 33 at the corresponding side of the ingot stop, and the middle portion 31 of the rope or cable passes upwardly from the last sheave at each side and over idlers 37, which are journaled in the frame of the trolley or carriage. These idlers serve to equalize the pull on' the continuous rope or cable. When the stripping motor is operated, the stripping cross head 17 raises the mold with its ingot against the lower end of the ingot stop, and as this stop is fixed to the trolley frame, the continued operation of the motor 19 strips the mold from the ingot, the empty mold rising up with the stripping cross head and passing upwardly with said cross head inside a depending frame or casing 38, which is carried by the trolley or carriage between the two girders 2.

39 is a frame or spider which has a central bearing 40, arranged to slide on the ingot stop and which has a sliding bearing at 41, within the frame or casing 38. The

.bearing 40 not only forms a guide for the upward movement of the stripping head 17, but it also supports the ingot stop against deflections or side strains. When the ingot mold is raised in the manner described, the spider or yoke 39 slides upwardly within the frame or casing 38 with the crossvhead 17.

The means for operating the tongs 16 to release their grip on the ingot mold is as follows: 42 designates a drum carried by a shaft 43, and which is driven by gears 44 from the sex-tension 45 of the shaft of the winding drum 28. Secured to the drum 42 is a rope or cable 46, which passes around a take-up sheave 47, and thence downwardly to the tongs. The lower end of this rope or cable is branched, one branch passing under a sheave 48, and thence across and" connected to an upwardly extending lever extension 49 of one of the tongs, and the other branch passing down and connected to a horizontally extending lever extension 50 of the other tong. In the operators cage 51 is provided a foot lever 52, which is connected by a vertical rod 53, bell crank 54, transverse rod 55 and bell crank 56 with a movable arm 57, upon which the take-up sheave 47 is journaled. The gear wheels 44 are so proportioned that the winding speed of the small drum 42 will be substantially exactly the same as the lifting speed of the stripping cross head 17, so that while'the cross head is beinglifted with the ingot mold, there will be no pull on the rope or cable 46, and the tongs will remain closed. When it is desired to open the tongs to release the mold, the operator presses his foot on the foot lever or treadle 52, and through the connections described moves the arm 57 and thereby the sheave 457 a sufficient distance to deflect the rope or cable 46 to cause it to pull on the lever extensions 49 and 50 of the tongs, and thus open them. The tongs close by gravity, as before stated.

It frequently happens in the operation of stripping ingots, that some of the molds stick on the ingots and require great power to be exerted to strip them. This power sometimes runs as high as from 200 to 400 tons, while other ingots can be stripped with the application of from 5 to 50 tons power. Since the stripper has to be made sufiiciently strong to provide for the maximum strength in stripping, it is desirable from an economic standpoint to have a two-speed stripping device, so that in stripping molds which require comparatively small power, this can be done at a much faster speed; while when it is necessary to exert a comparatively heavy power, the speed can be changed. I have therefore provided means wherebythe speed of the drum 28 can be readily changed, this being under the complete and instant control of the operator. When the operator gets hold of the ingot with the tongs, he does not, of course, know what power is going to be required to strip it. By means now to be described, the operator can have the machine normally arranged to strip at high speed, and if the ingot sticks and refuses to allow the mold to be stripped with less power and high speed, he can almost instantly change to high power and less speed. This mechanism is shown in detail in Figs. 5 and 6 of the drawing, and is as follows: Secured to that section 20 of the armature shaft of the motor 19 which is directly connected to the armature is a friction clutch member 58, which is arranged to cooperate with a second friction clutch member59, which is secured to a sleeve 60, loosely journaled around the shaft section 20, and carrying a differential gear casing 61, having gear teeth 62, on its inner periphery. Connected to the shaft section 21 is a sleeve 63, which has a plate or disk 64, within the flange of the gear casing 61, and carrying pins or journals 65, upon which are mounted gears 66, which mesh with the internal gear teeth 62 of the gear casin 61, and also with the teeth of a pinion 6?, keyed or otherwise fixedly secured to the shaft section 20. 68 is a brake band which passes around the outer periphery of the gear casing 61, and whose ends are ponnected at the points 69 and 70 to a leve r arm 71. This lever arm is connected by a rod 72 with a rocker arm 7 3 of a shaft 74, to which is secured an operating lever 75. Secured to a second rocker arm 76 of the shaft 7 1 is a rod or link 77, which crosses rod or link 72 and is connected by a bell crank lever 78 wit-h a clutch-shifting fork 79, which engages the member 58 of the friction clutch. The normal high speed operating condition of the parts is that shown in Fig. 5, in which the two members 58 and 59 of the friction clutch are in engagement with each other, so that the motion of the shaft 20 is transmitted through the differential gears to the shaft section 21 and pinion 22, the friction band 68 being slackened and the gear case 61 revolving with the sleeve 60 and shaft section 20. To change to low speed, the friction clutch is disengaged and the friction band which passes around the differential gear case is tightened up, thereby preventing said case from rotating. Consequently, the pinions of the gears 66 will be driven by their engagement with the pinion 27 on the shaft section 20 and these pinions with the plate or disk 63 will be rotated within the gear case, thereby turning the sleeve 63 and shaft section 21 at a very greatly re duced speed, due to the gear reduction. There will, of course, be a corresponding increase in the power or torque.

80 designates the usual brake wheel which is placed on the shaft section 21.

By means of the connections described and shown in detail in Figs. 7 and 8, it will be seen that one movement of the hand lever 75 will simultaneously throw the friction clutch in or out and tighten or slack the friction band 68, thus giving the operator complete and instant control of the speed.

Any suitable form of friction clutch may be employed, the exact arrangement of the differential or change gearing may be varied, and in some cases the feature of the differential or change gearing may be omitted entirely. The details of construction of the trolley frame and of the various other parts may be widely varied, as may also the arrangement of the motors and actuating gearing.

I claim:

1. Ingot-stripping mechanism comprising a movable carriageor trolley having a depending adjustably fixed ingot stop and also having a depending frame or casing around the stop, a stripping head movable upwardly on the stop within the frame or casing, and a bearing for the stop arranged to slide within the said frame or casing, substantially as described.

2. In ingot-stripping mechanism, a stripping head, tongs pivoted thereto, a rope or cable connected to the tongs, hoisting mechanism connected to the head, a winding drum for the rope or cable, and means for operating said drum to wind a rope or cable thereon at the same speed as the movement of the head, together with means for defleeting the rope or cable to open the tongs, substantially as described.

3. In ingot-stripping mechanism, a vertically movable stripping head, tongs carried by said head, hoisting mechanism connected to the head, a drum geared to the hoisting mechanism, a rope or cable connected to said drum and to the tongs, a movable defleeting device engaging the rope or cable, a lever, and actuating connections between the lever and the deflecting device, substantially as described.

4. Ingot-stripping mechanism comprising a movable carriage or trolley having a depending adjustably fixed ingot stop, a stripping head'movable upwardly on said stop and having a plurality of sheaves journaled thereon, other sheaves journaled to the frame of the trolley or carriage, a hoisting drum, a motor geared to said drum, and a rope or cable having its ends connected to said drum and passing around the two sets of sheaves, substantially as described.

5. Ingot-stripping mechanism comprising a movable carriage or trolley having a depending adjustably fixed ingot stop, a stripping head movable upwardly on said stop and having a plurality of sheaves JOHII'lHlGCl thereon, other sheaves journaled to the frame of the trolley or carriage, a hoisting drum, a motor geared to said drum, a rope or cable having its ends connected to said drum and passing around the two sets of sheaves, and idler sheaves carried by the trolley or carriage over which the intermediate portion of the rope or cable passes between the two sets of sheaves, substantially as described.

6. In ingot-stripping mechanism, a trolley or carriage having a depending ingot stop, means for holding said stop in a fixed position during the stripping operations, a hoist ing drum, a motor for operating the drum, and a change speed gearing connecting the motor with the drum, substantially as described.

7. In ingot-stripping mechanism, a movable carriage or trolley, a hoisting drum tween the lever and the brake member, sub- 10 thereon, a stripping headconnected t0 the stantially asdescribed, v

drum, an actuating motor'for the drum, In testimony whereof, Ihave hereuntoset driving means connecting the motor with myhand.

the drum,'said means including a friction i i =1 elutch, a change speed gearing and a brake DAVID KEL member for one element of said gearing, a 'W'itnesses: single operating lever, and connections-be- EDWIN W. DIEHL, tween said lever and the clutch and also be- GRACE MOODY.

Copies of this patent maybe obtained for fiveeents each, Joy addressing the Gommissionerof Patents,

' Washington, D. :0.

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