US1290015A - Brick-hacking apparatus. - Google Patents

Description

R. C. PENFIELD. BRICK HACKING APPARATUS.

APPLICATION FILED FEB. 9. 19]! 1 ,2901315. Patented Dec. 31, 1918.

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BRICK HACKING APPARATUS.

APPLICATION FILED FEB. 9. mm.

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BRICK HACKING APPAITATUS.

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Patented Dec. 31, 1918.

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BRICK HACKING APPARATUS.

APPLICATION FILED FEB-9.1911.

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APPLICATION FILED FEB. 9, NHL 1,290,015. Patented Dec. 31, 1918.

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WITNESSES- R. C. PENFIELD.

BRICK HACKING APPARATUS.

APPLICATION FILED FEB 9,19Il.

Patented Dec. 31, 1918.

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R. C. PENFIELD. BRICK HACKING APPARATUS.

APPLICATIO FILED FEB. 9. 19H. 1,290,015., Patented Dec. 31,1918.

ATT'Y [NI/ENTER.

" U1 El) sTaT s PATENT OFFICE.

RAYMOND o. PENFIELD, on NEW Your, N. Y.

BBICK-HAC KING APPARATUS.

To all whom it may concern:

Be it known that I, RAYMOND C. PEN- FIELD, a citizen of the United States, and a resident of the city, county, and State of New York, have invented an Improvement in Brick-Hacking Apparatus, of which the following description, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

The hacking of bricks, z. e. placing the molded bricks in proper spaced relation in stack formation for,drying and burning, is usually a very laborious, tedious, and relatively expensive and somewhat destructive procedure, as it is accomplished largely by hand.- In my prior Patent No. 985,203 of February 28, 1911, filed August 22, 1910, I have set forth an apparatus for receiving continuous streams of bricks from a brick machine, and delivering the same in hacked relation upon a drier car or elsewhere. The present application is a division of said application and is drawn to cover the delivery portion of the apparatus,comprising in its preferred embodiment, a series of carriers or clamping means arranged to receive their loads of bricks While in motion, these being for this purpose operated to travel at the loading region individually in unison with the cut bricks as the bricks are moved, preferably by belt, after being cut at the cutofl'. These automatic carriers, moving in unison as stated, make it practicable to handle the bricks automatically from the continuously operating brick-machine and cut-off.

A second feature of the construction resides in providing means for bunching together in units the bricks which have been previously separated at the cut off, and by this bunching together is meant the bringing together again of a predetermined number of the separated bricks so that they are again in substantially the same relation as they were before being separated. The purpose of this feature of the construction is two-fold, first, to gain time for the proper handling of the bricks and the mechanical necessities of theprocess, and second, to insure the handling of the bricks in the desired units to the best advantage for hacking purposes. This bunching together of the bricks accomplishes a predetermined 1n- Speciflcation of Letters Patent. Patented Dec, 31, 1918,

Original application filed August 22, 1910, Serial No.

578,438. Divided and this application filed February Serial No. 607,650.

terruption in the otherwise continuous stream of bricks, without, however, interfering with the automatic and continuous handling and hacking of the bricks; A third and equally important feature of the construction relates to a further utilization of the same principle of providing a time interval or means for. gaining sufiicient time for the accomplishment of certain necessarily slow portions of the work not-withstanding that the system is continuous, automatic, and rapid as a whole. This third feature resides in providing, in connection with the continuous series of carriers and cooperating mechanism which deliver the bricks to the carriers and enable the carriers to receive the bricks in a practically endless, on-moving stream limited only by the speed and capacity of the brick machine,

means for automatically providing, in conveyers which deliver the bunched units or loads to the individual carriers, a system of runways containing a series of branches arranged in such order, and the whole provided with such automatic operating means, that each carrier is permitted to have a period of slow movement or actual stoppage when it arrives at the delivery point, during which its load is disposed of in the desired hacked relation to the previous loads, as stated, before the carrier is obliged to proceed back on its circuit to take its place again 'in proper order relatively to the stream of bricks which the brick machine has continued to make notwithstanding the period of halting of the given carriage. These two time-interval provisions, viz., the periodicity or time-giving efi'ect produced by the bunching operation, and the time-intervals for hacking permitted automatically by the branch runways, are essential to the most --carrier and operating mechanism, parts hecomplete success, because they permit the automatic operation of the entire apparatus in accordance with the speed and capacity of the brick machine and the cut-0E. Notwithstanding that the loading of the carriers and the unloading of the carriers (2'. e. the actual hacking operation) each requires time and would apparently therefore require that the wholeapparatus should halt therefor, the invention provides these time-intervals without requiring said halting. lhe first two of said features are claimed in my said application N 0. 578,438, as also the invention as a whole in its more general aspects; the present application is designed to cover m re especially the thirdoneuof said features, separately as well as in the combination dis-- closed, this being obviously capable of use in other relations.

In the accompanying drawings, in which the entire apparatus and system are shown in their preferred embodiment,

Figures 1, 2, and 4 show in three views a side elevation of the front end of the apparatus, where the bricks are made and loaded onto the carriers:

Fig. 3 is a detail in front elevation of an automatic brake for the carrier-propelling mechanism;

F ig. 5 is a view largely similar to Fig. 1, excepting that it is in longitudinal vertical section for showing further details;

, Fig. 6 is an end view of the tripping track or directing means for a portion of the launching apparatus;

Fig. 7 is a plan view showing the general arrangement and system constituting an important part of the invention;

Fig. 8 is an enlarged fragmentary view in side elevation of the upper portion of the ing broken away and sectioned for clearness of illustration;

Fig. 9 is a vertical longitudinal sectional view through the hub and axle of the driving gear of a carrier;

Fig. 10 is a fragmentary view in side elevation of the upper portion of one of the trips or stops;

Figs. 11 and 12 are vertical cross sectional views of the lower clamping portion of a carrier showing the same respectivelyin brickcarrying position and brick-separating position;

Fig..,13 is an enlarged side elevation of the lower end of a carrier;

F lg. 14 is a vertical cross sectional view taken on the line 14-14, Fig. 13;

Fig. 15 is an enlarged central vertical cross sectional view of the pivotal connection be tween the upper and intermediate part of the carrier; 1.

Fig. 16 is a view in end elevation'of the parts shown in Fig. 8, looking toward the right;

Leaders Figs. 17 and 18 are horizontal sectional details on the lines 1717 and 18 -l8 respectively, Fig. 15;

Fig. 19 is a vertical longitudinal sectional view of the'automatic circuit controller and buffer provided for each carrier;

Fig. 20 is a detail in front elevation of the bufier switch or circuit controller of Fig. 19;

Fig. 21 is a cross sectional view of the clamping portion 'of a carrier showing a succeeding position thereof in addition to Figs. 11 and 12;

Fig. 22 is an enlarged plan view of a portion of the automatic carrier delivery mechanism and adjacent brick-supplying apparatus; I a

Fig. 23 is a vertical sectional view, partly broken away, taken on the! line 23-23, Fig. 22

F ig. 24: is a diagrammatic view ofthe electrical connections of a carrier;

Fig. 25 is an enlarged cross sectional detail of one of the pole changers of the latter;-

Fig. 26 is a plan view of a portion of the automatic switching mechanism;

Fig. 27 is a sectional view showing in side elevation one of the stops, shown in Fig. 29;

Fig. 28 is a cross sectional view taken on the line 28-28, Fig. 26;

Fig. 29 is a cross sectional view taken on v the line 29-29, Fig. 26; and

Fig. 30 shows in front elevation and top plan or diagram one of the switch operating devices and its connections with the trolley wire forming part of the apparatus.

While this invention is particularly adapted to the stiff mud process of making bricks,

it will be understood that it is not restricted in this respect, or in fact in any other respect, except as required by the claims at the end of this specification, inasmuch as the invention is broadly new and of a pioneer character in the art of hacking bricks.

Referring therefore, by way of illustration, to the manufacture of bricks from stifi mud or clay, the properly mixed clay is delivered in a continuous stream or streams from the die 1 of a usual stifi' clay brick machine 2, to an off bearing belt 3 which travels in unison with the discharge of said stream of clay, two such streams being herein indicated. The belt 3 carries the streams or columns of transversely molded clay forward to a cut off machine 4, each of whose arms 5 is provided with a wire 6 in well known manner for severing the streams of clay into individual bricks 7, and. in order that said bricks after being severed shall not be marred by the wire 6 as it comes up on the right-hand side, Fig. 1, the severed bricks are delivered by the belt 3 to a belt 8 which travels at an increased speed, therebyseparating the bricks asshown on the of the bricks into bunches.

belt 8 adjacent the cut off machine 4, thus providing ample intervals between said bricks to insure the proper upward movement of the wires 6 between and out of contact with the bricks, and to facilitate the subsequent division, separation or grouping In order that these bricks may now be brought into the first position requisite for hacking purpose, viz., contiguous endwise relation in such numbers as may be required to constitute a unit for handling purposes in connection with the ultimate hacked stack of bricks, means is provided for the aforesaid bunching of the bricks together in said unit. While this may be accomplished by a wide variety of bunching means or mechanisms, it is preferable according to the general arrangement of the apparatus of the drawings, to provide means for retarding the forward brick of the proposed series or unit until.the required number of bricks shall have caught up with said first brick. In thus retarding the bricks it is preferable not wholly to stop the bricks or any ofthem but to keep the clay moving at all points from the brick machine onward. As soon as a complement of bricks has been thus bunched into a unit, the retarding means releases said bricks and they are then sent forward as a unit to suitable carrying means, preferably overhead means (having'obvious advantages Over a surface carrier for instance). As one of the purposes of the bunching operation at this point inthe system, is to rovide a suitable gap or time interval between the successive units of bricks in order to permit the cooperating carrying mechanism, etc., to perform its functions properly and with certainty, the successive bunches of bricks,-having necessarily been separated from each other by the retarding action mentioned, are then moved forward at a faster rate of travel than that of the clay delivery at the brick machine. preferablv at the same rate of travel as the retarding device, thereby maintaining an interval between successive units or bunches preferably corresponding to the to al spaces which previously separated the bricks now constituting each unit or bunch of bricks. Also. as, preferably, the carrying means moves likewise at this same speed. it becomes at once practicable to maintain the handling of the bricks in the manner thus far de cribed continuously as long as the brick machine runs, as no congestion can possibly take place at anv point. The means of handling the bricks from the brick machine to the carrier preferably consists of belts. The belt 8 rests on transverse supporting rolls 9 journaled in lougitudinah girders 10 of the main framework and passes over end guide pulleys 11 adjustably mounted in said frame and thence around a drive pulley 12 and over an adjustable belt I tightener 13, said belt having a construction which will permit the bricks to slide somewhat thereon without injury to the bricks, the belt for instance being made of sheet steel whose smooth surface readily permits this sliding movement of the bricks. The retarding or bunching mechanism consists of stop-plates or barriers 14 arranged to be projected into the path of the leading brick of a series whenever it'is desired to bunch said series together. Preferably these stopplates,barriers, or retarding devices 14 of the bunching mechanism are supported from overhead and arranged to be lowered into retarding relation with the bricks intermittingly as required, being for this purpose mounted on transverse pivots 15 journaled at the requisite intervals on a belt 16 passing over an idler ulley 17 at one end and a driven pulley 18 Figs. 1, 5-, 23) at the other end, supported respectively by uprights 19, 20, of the general frame work. In order that the stops lates or retarding devices 14 may be helc rigidly with the proper strength of resistance to the normal nward movement of the bricks when the latter are being bunched, they are provided with special means for accomplishing this purpose, comprising arms 21 fixed on the opposite ends of each pivot shaft 15, each arm being provided with a guide roll 22 at its outer end and a similar guide roll 23 at its inner end and a controlling track or pair of directing rail 24, is provided adjacent the lower travel of this mechanism provided at its left-hand end, Fig. 1, with an inwardly deflected end piece 25, a way 26 for the passage of the outer roll 22, and a guide end 27 for compelling said outer roll to pass through said way 26 (see also Fig. 6), so that as the belt 16 carries a stop-plate or retarding device 14 downward its rolls 22 first strike against the top inclined edges of the opposite end pieces 25 along which said rolls travel and then immediately drop down into the ways 26, where they are momentarily held by the guide ends 27 until the arms 21 have been number of bricks together has b en accomplished. This stop plate or retarding device 14 is preferably caused to assume its said rigid vertical position in the open space between two bricks as shown at the left. Fig. 1, and as the bunching is accomplished in the preferred method of the machine of the drawings, by having the bricks travel faster segregated groups or bunches of bricks, and

than said retarding device, it will be readily understood that the leading brick quickly comes into contact with the barrier or retarding device, 14 and is held thereby while its belt 8 slides beneath said brick, thereby bringing against the rear end of said brick the next following brick, which in turn is held while the belt slides beneath it until the third brick abuts against said second brick, the belt continuing to slide beneath said thus retarded three bricks until a fourth brick is. brought by the beltint endwise relation against the preceding three retarded bricks. This, in the present howing of the invention constitutes a bunch or unit, and it will be understood that inasmuch as both streams are treatedalikeand-simultaneously, it is deemed necessary to describe only one. As it is important, in the aspect of the invention being considered, that the stopplates or retarding devices 14 shall travel in definite speed relation to the off-bearing belt 3 and cut-off 4, which deliver the bricks to the bunching mechanism and t the belt which receives the bunches of bricks from said bunching mechanism, driving mechanism is provided for insuring said travel and rendering the same instantly responsive to variations in speed, notwithstanding the considerable driving power required for the subsequent belthandling of the separated groups of bricks. For this purpose, the

shaft 28 of the driven pulleys 18 is .pro-

vided with a belt pulley 29 driven by a belt 30 and pulley 31 fast on the main drive shaft 32 and geared by a pinion 33 to a gear wheel 34 fast on the shaft 35 which carries the pulley 12. The belt 30 is held under proper tension by a belt tightener 36. This mechanism affords the requisite driving power not only for the retarding mechanism, but for the parts which handle the it tends to maintain the retarding mechanism driven at a higher speed than required, and, accordingly, to regulate said speed'in accordance with the travel of the off-bearing belt 3 and the cut-off mechanism, and in accordance with the travel of the receiving belt 43, a shaft 37 is provided having a worm wheel 38 at one end in mesh with a worm 39 on the drive shaft 40 of the cut-off 4. which shaft 40 also serves-to drive the belt 3, said shaft 37 at its opposite end being connected to the retarding mechanism drive shaft 28 by gears 41, 42. Thus the belt 3 controls the retarding mechanism so {)hat the plates 14-wil1 meet every fourth rick.

The bricks thus bunched in proper units as moved on belt 8 are carried by said belt. 43 to the carrier portion of the hacking mechanism. As already stated," it is important in the machine of the drawings that the bricks should be maintained in bunches,

mea ow and accordingly suitable mechanism i pro vided for providing the belt 43 with a travel slightly faster than the belt 3, and corresponding, as herein shown, to the speed of retarding belt 16. The front end of the belt passes over a guide pulley 44 adjustably supported on the main frame of the machine adjacent the guide pulley 11 of the belt 8, and sufiiciently forward beneath the bunching mechanism to insure referably that a bunched unit of the bricks shall be mainly transferred to the belt 43 before it is disengaged or released by the stop-plate 14 as the latter moves away from the outgoing horizontal end of the track 24. The shaft 37 acts as a coupling device or connection between the three belts 3, 16 and 43 to maintain invariably the same relative travel or proportionate speed, the belts l6, and 43 always moving faster than belt 3. The belt 43 is guided on rolls 45 journaled in the frame of the machine, the same as in the case of the previous belts, and at its rear end is adjustably supported on a driven pulley 46, Fig. 4, fast on a shaft 47 adjustably'mounted on the adjacent portion of the frame of the machine and provided with a pulley 48 driven by a belt 49 and overhead pulley 50 connected by beveled gears15l to an overhead shaft 52 which, at its forward end, is connected by beveled gears 53 to a vertical shaft 54 connected in driven relation to the shaft 28 by beveled gears 55, said shaft 28, as already stated, being controlled directly from the cut-off and off-bearing shaft 40 by mean of the inclined shaft 37. As the streams of bunched bricks are moved continuously along in separated bunches or groups by the belt 43, they are picked'up automatically by an overhead carrier (said carrier being by preference an overhead device, as already explained). There is a proper number of these carriers to assure the uniform presence of a carrier for each bunch of bricks as the latter are continuously moved along by the belt 43. The carriers, however, and various portions of the necessary work of hacking the bricks vary considerably as to the periods of'time required at a given point or extent of travel of the bricks, and accordingly, in order that the system may be automatic and continuous, two runways or overhead tracks 56, 57, Fig. 7 are provided, each extending in a complete circuit and having mechanism for permitting the empty carriers to accumulate adjacent the bunching mechanism ready to be loaded said me hanism automatically delivering the carriers one at a time alternately along the respective tracks 56, 57, as will presently be described. Overthe loadin, belt 43. the tracks 56, 57 have a depressed rortion 58 with a downward incline 59 at the ingoing end and an upward incline 60 at the outgoing end, and in order that the anism is thereby rendered inoperative by running off from the live wire onto the dead wire, and as the carrier with its load leaves the loading section its driving mechanism becomes operative to carry it along by leaving the dead wire and entering upon the live wire. As a. convenient means of insuring that each carrier shall move in absolute unison with its bunch of bricks while it is being loaded with saidbunch, this portion of the driving mechanism of the carrier is preferably connected with the same actuator as the brick carrying belt 43, viz., the

shaft 52. Accordingly, in the upper framework i journaled a transverse shaft 63 operatively connected to said shaft 52 by beveled gears 64 and provided with a driving wheel 65 (one, of course, for each series of carriers) which drives a belt 66 guided at its opposite end by a wheel 67 whose shaft 68 is shown as journaled on the framework above the shaft 52 and preferably provided with a belt tightener 69, the lower strand of the belt being guided parallel to the track portions 58. 5 9 by an idler or small guide wheel 70. T his belt is provided with pushers or depending lugs 71 spaced apart in accordance with the bunches of bricks on the belt 43. \The carriers are delivered automatically one by one into the position shown in Fig. 2, where they are engaged by the lugs 71. For this purpose each carrier is provided at the upper end of its framework with a rigid bracket or yoke 72 whose forward end 73 projects in position to be engaged by the lug 71 and whose rear end 74 projects sufficiently to engage behind said lug as soon as the carrier has moved forward slightly. the upper horizontal portion ofthe track continuingforward a short distance, see Fig. '2, beyond the point of initial engagement of the lug with said bracket before the inclined portion 59 of said track permits the carrier to move downwardly. Thus when the downward moveinent of the carrier takes place, the lug 71 is locked between the two parts 73. 74 of the carrier bracket oryokeso that the carrier is prevented from going eitherfaster or slower than the lug 71 and its driving belt 66. As the carriers are delivered to the position shown in Fig. 2, they are halted by a friction spring wiper 75 which holds the carrier stationary on its track until engaged by a lug 71 which draws the carrierforward away from the-wiper and along the track 5860. Each carrier is provided with a trolley wheel 76 at the end of a trolley arm 77 mounted thereon at 7 8 for delivering current to a motor 79 mounted on a platform 80 at the upper end of the carrier, said motor driving a toothed pinion 81 j ournaled in a bracket 82 on said platform and meshing with a gear wheel 83 whose shaft 84 is journaled in the upper part'of a hanger V 85, being connected thereto by ratchet mechanism 86, said shaft carrying a traction wheel 87, see Figs. 8 and 16, traveling on the track 57, said hanger also being provided with a similar traction wheel 88 to give stability of position to the carrier. The ratchet connection 86 permits the carrier to be driven normally by its motor 79 and yet permits the carrier to be moved by the belt 66 independently of the motor or to be pushed forward by hand when desired. The carrier proper is suspended from the lower end of the hanger 85 on a horizontal pivot 89. and is provided with swivel or swinging .movement as shown in detail in Figs. 8 and 15. While this movement may be provided by. any suitable means, two parts 90. 91 are .shown connected by a bolt 92 in position to receive between them a flanged ring 93 to which are bolted depending. arms 94, a suitable ball bearing 95 being interposed between said fianged ring 93 and support 91. A bolt 96 carried by a lever 97 pivoted at'98 locks the supported member or members 94; against rotation when a load is being received and transported, said bolt then passing through holes 99 and 100 inthe relatively movable adjacent parts. 'Wh e'n the load is about reaching its destination, this bolt is automatically removed by a trip 101 which engages a roll 102 at the free end of said lever 97, thereby withdrawing the locking bolt 96 so as to permit the carrier and its load to be turned into proper position when required for-stacking purposes. The depending arms 94. carry at their lower ends a platform 103 which supports the lifting and lowering apparatus for operating the load-receivin and clamping portion of the carrier, which forms the lowermost part thereof and is suspended from the part thus, far described by cable 104 and guided bV rods 105 which pass through guides or guide brackets 106 on the lower side and opposite ends of the platform 103, said cables 101 being secured to a supporting beam 107 by any comprises a longitudinal web or supporting member 109 of the frame, provided at its upper edge with laterally projecting longitudinal angleirong 110, Fig, 1 1, and to its lower edge are riveted at 111, Fig. 21, a series of relatively heavy supporting brackets in the form of laterally projecting rods 1.12 extending in opposite directions from anintermediate bearing 113 for a shaft 114. This web-like frame is yieldingly supported at its opposite ends by short guide rods 115 which pass through guide eyes 116 in the beam 107 and extend at their upper ends through cross heads 117 'adjustably connected by tie rods 118, Fig.14, to-the angle-iron top 110 of the clamping frame, springs 119 surrounding said guide rods 115 and engagingat their lower ends the beam 107 and at their. upper ends the cross heads 117. To limit the upward movement, stop bars 120, Fig. 1 1, are adjustably clamped by setscrews 121 to thetie rods 118. On each arm 112 is slidably mounted anindependently movable clamping jaw or blade 122 to cotiperatewith inner jaws 123 in clamping the bricks as when said shaft i rotated by its handle 128.

The two inner jaws 123 preferably extend the entire length of the carrier, a. the length of four bricks, while a plurality of the outside jaws 122 are preferably provided, each adapted to engage a separate brick so as to provide for those slight variations in thickness ofthe bricks which invariablv oc'ur in brick manufacture. The jaws slide on the arms 112 as stated, and are prevented from turning thereon by studs 129 projecting from the upper ends at the.

inner jaws 123. Eachi'cam 125 h'asanarm 130, said arms havingconnection permit ting them to be rockedtogether and yet move toward and from each other, said connection consisting of a transverse'head 131 on one arm provided with a reduced portion 132 telescoping-into a socket end of a cooperating head 133 on the other arm swinging in a slot 134- in the web-like frame 109 when actuatedby a bell crank lever 135, Fig. 13, to which all the arm heads 133 are connected by a link 136. The bell crank 135 is pivoted on one end of the rods112 and provided at its lower end with a tripping roll 137 to be automatically actuated in one direction by a latch or trip 138, Fig. 13, pivoted at 139 on the girder-107 of the car- .rier frame and in an'opposite direction by a stationary cam trip-140, Fig. 4, adjacent the brick-carrying belt 13. Thus, as the carriers movev down the tracls'fii ihteiloadincense ing position over belt 43, the clamping jaws 122, 123 occupy the open positions shown in'Fig. 21 with relation to the bricks, having been moved into said position by the cooperation of the roll 137 and latch 138 when delivering the load of bricks at the hacking car. F laring guides 141 direct or center the jaws so that they comedown in proper relation to the bricks with the jaws 123 be tween the two rows of bricks as shown in Fig. 21 and thejaws 122 at the opposite sides of the double row. Then, as the carrier, moving in unison with the bricks, is passing the cam trip 140, the latter is engaged by the roll 137 and thereby all of the arms 130 are swungv from the position shown in Fig. 13 to the opposite ends of the slots 134,-thereby rotating the cams 125 with relation to the cams 12 1 and permitting the jaws 122, under the action of springs 126, to close tightly into the, bricks as shown in Fig. 1 1. When the roll 13 is lifted by the cam 140, it strikes against the side and slightly deflects the depending pivoted latch 138 where the latter hangs resting against one side of said roll until the car starts u the incline 60, whereupon the wei ht of tie load of bricks compresses the springs 113, permitting the frame 109' to lower sufiiciently to carry the roll137 be-' low the lower end of said latch 138, which thenswings back into vertical position im- I mediately above said roll, so that. when the operator lowers the carrier with its loadof bricks: onto the oven car or stackingcar, the latch reverses ,the movement of the lever 135 and thereby partially releases the bricks.

The relative vertical movements of the difterent parts of the frame, asidevfrom those already mentioned, are accomplished by the electric mechanism carried on the. platform 103 The hoisting cables 104: pass over sheaves or drums 142, Fig. 8, on the opposite ends of a shaft 143 connected by a train of gears 14:4 to the armature shaft of a hoisting motor whose other end is provided with a brake wheel 146, Fig. 3, which is embraced by a pair of brake levers 147 pivoted at 148 to a -bracket 149 rigidly fastoned to the frame of the motor. This. bracket also carries an electromagnet 150 (energized from the field circuit of the motor)-whose two cores 151 connect with the upper ends of said levers 147 for releasing the brake in opposition to a brake-applying spring 152; --Thus, when the current is turned on for running the motor, the brake releases the motor and, when the current is cut oil, the electromagnet is thereby deehergized andthe spring 152 applies the brake levers instantly to stop the motor. The wiring of the carrier is shown in Fig 24, where it will be seen that two circuit controllers 153, 154 are provided to enable the operator to control the carrier, the forlie

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