US1062814A - Plaster-board-cutting machine. - Google Patents

Description

D. F.- BERNHARDT.

PLASTBR BOARD GUTTING MAGHINB.

. APPLICATION FILED AUG. 3, 1910. 1,062,814, v Patented May 27, 1913.

4 SHEETS-SHEET 1.

D. F. BERNHARDT. PLASTBR BOARD CUTTING MACHINE.

l APPLICATION FILED AUG. a, 1910. 1,062,814. v n Patented May 27, 1913.

' 4 SHEETS-SHEET 2.

wv@ Moz palati EBay/706071566 D. F. BERNHARDT.

PLASTER BOARD CUTTING MACHINE.

PPLIOATION FILED AUG. 3, 1910.

1,062,814.' Patented May 27, 1913.

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' N w Q *W x R I I)\ @ifo/Lung y D. F. BERNHARDT. PLASTER BOARD CUTTING MACHINE.

APPLIOATION FILED AUG. 3, 1910.

1,062,814.y Patented May 27, 1913.

4 SHEETS-SHEET 4,

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UNITED sTArn s i A'iENT OFFICE. y,

r DAVID F. BERNHARDT, OF NEWBRIGHTON, NEW YORK, ASSIGNOR TO UTB. KING & C0.,

F `NEW YORK, .A CORPORATION OE NEW YORK.

PLASTER-BOARD-CUTTING- MACHINE.

, Patented May 27, 1913.

' Application led August 3, 1910. Serial No. 575,274.-

To all ulwm 1' t may concern Be it known that 1', Davm F. Binzmmnnr, a citizen of the United States, and a resident of New Brighton, county of Richmond, city of New York, and State o-f New York, and whose. post-oiliee address is care of J. B. King & Company, New Brighton, in said city, have invented a new and useful Improvement in Plaster-Board-Cutting Machines, of which the following is a speciication.

` The 'object of my invention is to make amachine of this class which will be simple in construction, durable and efficient in operation, and which will sever plaster-board in any desired length without in any way interfering with the continuous movement.- of the board through the machine so that the machine can be operated continuously and indefinitely. This object is accom-- plished by my invention, one-embodiment ofwhich is hereinafter set forth and fur-P ther pointed out in the claims.

For a more particular description of my invention, reference is to be had to the accompanying drawings, forming a part hereof, in lwhich: Y

Figure 1 is a plan View of a portion of a plaster-board machine provided with my improven'ient. Fig. 2 is a side elevation of the same. Fig. 3 is a view taken at right angles to `the views shown in Figs. 1 and 2 and shows theicutting mechanism and its supporting means; Fig. 4. is a diagrammatic view of the electrical connections. Fig. is a side elevation of a disk onwhich the electrical connections are made. This view also shows other details. Fig. 6 is a sectionalview taken on the line 6-6, Fig. 5 looking in the direction of the arrows. Fig. 7 shows a portion of a segmental gear. Figs. 8 and 9 are a plan and side elevations respectively of a magnetic clamp. Fig. 10 is a sectional view taken onthe line 10--10, Fig.; 9 looking in the direction of the arrows. Fig. 11 is an elevation partially in section of a motor and connections with the cutting member for its transverse movement. Fig. 12 is a diagrammatic view of electrical contacts at one end by which the connection is made or broken.

Throughout ,the Vvarious views of the drawings, similar reference characters des-v ignate similar parts. f

My cutting device 1 may be applied to about 50 degrees.

any plaster-board machine and is particularly adapted to a machine 2 which formsv The roller 4 is mounted on a suitable axle 5 journaled in suit-able bearings 6, which are carried in any' suitable manner directly from the ioor 7, on which the machine rests or otherwise. The shaft 5 also carries a pulley 8 driven by any suitable belt 9, which belt drives .the machine 2. i The .other end cf the shaft 5 is provided with a disk 10, which is secured thereto by means of set screws` 11, and so'may be adjusted thereon. This disk 11 is made of some insulating material such as liber, rubber er some similar substance and carries concentric conductors 12, 13, 14, 15, 1`6 and 17. The oo nducto-rs 14 and 15 are annular and closest to the center .of the shaft 5 and -remain in constant contact with the brushes 18 and 19 respectively, whichl are carried on .an arm 20 in a suitable manner, which larm is supported by a bracket 21 that rests on the Hoor 7. The bar 12, Ais l.adapted .to come in contact .with a brush 2 2. The bar 13 is adapted to come in contact with a brush 23,

the bar 16 .with a brush 24, and the bar 17 with a brush 25. The bars 12., 13, 16 and 1.7 all have about the same angular length, i. e., On the rear of the disk 10, or otherwise, the bar 12 -is .connected with the ring 14, and the .bar 13 :is connected with the ring 15. The ring 15 is .also connected with the bar 16 and the Iring; 14 with the bar 17 The brush 23 `is .connected to the brush 25, and the brush 2id to -the brush 22. The brush 18 is connected .with one ``pole of the dynamo, say the negative pole, and .the brush 19 with the .positiue pole, or vice versa. y

From the foregoing, .it is evident .that when the brushes 24 and 25 are in contact with their respective bars 16 land 17, the current' will -ow in one direction through the wires connected withthe brushes, and

-direction of fiow of current through the fields, whereby the direction of revolution of the armature is reversed. Anpexamination of Fig. 4 will make this clear. The

' motor 26 has its armature 27 connected to Wires 28 and 29, which Wires run to the brushes 22 and 25 respectively and, of

course, the wire 28 is cross-connected with the brush 24, and the wire 29 is cross-connected with the brush 23. The fields 30- of the motor 26 are connected directly with thebus-bars 3l and 32 respectively, which are connected with the brushes 18 and 19 respectively. These bus- bars 31 and 32 are also connected by any suitable means, not shown, with the wires 33 and 34 respectively, which run to a motor 35 with a shunt field 36.

37 are clamping magnets which are connected directly between the wires28 and 29 in a manner, shown. The wires 28 and 29 are also connected by a knock-out switch 38 and a starting switch 39, whichwill be described below. The ordinary rheostat and startin switch for the main circuit are omitte as unnecessary for lthe purpose of illustration, as these are of the conventional -form and usedin the conventional manner.

It is to be understood that they are used in the usual manner when the apparatus is in operation.

In F ig. 4 the motor 35 is shownlconnected in the simplest manner. As will be pointed 42, which carry a crane 43 in t-he conventional manner. This crane 43 is the principal part of the cutter l and carries cutting mechanism. It consists of a bottom sill 44, a top chord 45 and uprights 46 and 47, as well as an' additional pair ot' uprights 48 that carry suitable top arms 49 for a purpose that will appear below. The bottom sills 44 are connected by suitable crossings 50, which are shown in dotted lines in Fig. l and pedestals 51 extending upwardly from the axles of the forward wheels 42, and the bottom sills 44 are connected by a frame 52 which carries the cutting mechanism. This frame 52 has a bottom member 53,'up`rights 54, and a top track 55 upon which is mounted a truck 56 thatgcarries'the motor 35. 4The motor 35 has ani-armature shaft 57, at one end of which is fixed a saw 58 which cuts or severs the plaster-board in a manner described below. The uprights 54 have suitable insulators 59 on which are strung three electricalconductors, 60,61 and 62 which are adapted to be engaged by three contacts or plows 63, 64 and 65 mounted on a suitable bar 66 and suitably connected through said bar to the motor 35, so that as the motor is moved on the track 55 in ta manner described below, it willalways be supplied with electricity and the speed thereof may be regulated by placing resistance either in the field or 1n the armature circuits, as may be desired. If it were not for this regulation, the wire 61, would be done away with and then the electrical connections Y would be as shown in Fig. 4; The preferable way is to regulate the speed of the motor 35 by putting resistance in the field fixed on a second shaft 69 provided with a worm 70 (see. Fig. 11) which worm re'- vo-lves in asuitable casing 7l and drivesa worm gear 72 mounted on a suitable shaft 73. The shaft 73 also carries a suitable drum 74, which is preferably provided with spiral grooves, and to which the ends of a cable 75 are attached. This cable 75 runs over suitable pulleys 76 and 77 on each end of the track 55 and suitably mounted therein and is fixed to the truck 56 which carries the motor 35. By this construction the rotation of the. armature 27 of the inc-tor 26 in one direction will cause the saw 58 to travel in the corresponding direction and the reverse movement of the armature carries the saw 58 in the other direction.

The" apparatus for limiting the movement 'of the saw 58 and truck 56 on the track 55 and for determining the direction of their movement will now be describedi A link 7 8 is supported at one end by a lever 79 ,tulcrumed at its lower end in a bracket 80 and provided at its uppe` end with an adjustable horn 81. The other end of the link 78 is supported by a lever 82 of the first order fulcrumed near its middle in a bracket 83 and pivotallyv connected at its lower end with the link 78. 'The upper end of this lever 82 is provided with a suitable contact horn 84 the same as the horn `81, except that of the rod 78 against the electrical contact a fixed contact 90 on the machine 2I when the cutter is at' its .starting point. This contact and its function will be described below more in detail. The bar 89 is electrically connected with thek end of the rod 78, and the contact 90 with the contact 88. These horns serve to give a sliding sweep. to the arm allowing a perfect mechanical movement without shock as would be t-he case if a straight rod were employed in lieu of the horn.

i The drum 4 on the shaft is provided atA each end with suitable segmental gears 91 which are held in place by suit-able cap screws 92, or in any other suitable manner. The length of these segmental gears and their position on the drum 4 are substantially as shown in Fig. 5, z'. e., .proportion ate to the side position of the segmental' bars 12, 13, 16 and 17. The set screws 11 permit the disks 10 to be set at any desired angular position on the shaft 5, so that it is easy to set the segmental gears and-bars in proper relation. The top chord 45 of the crane 43 carries suitable uprights 93, which are fixed in position in any desired manner andconnected at their upper end by a rack-bar 94,

- which meshes with the segmental gears 91.

The rack-barr94 is preferably composed of two parts, one a metal bar 95 and the other arack 96, the two parts being held together by suitable cap screws 97, so that the rack 96 may be adjusted on the bar 95, if neces-- sary. vhe rack 96 is provided with a downwardly extending catch 98 adjacent to the last tooth and adapted .to be engaged by the forward end of the segmental gears 9.1, so yas to insure a proper meshing o-f the teeth in the segmental gears and rack. As the drum 4 moves continuously, the rack-bar 94 is driven intermittently by the segmental gears 91 and vonly in one direction. It is obvious that the rack 94 is driven toward the rear of the machine along with the rest of the cutting apparatus which is carried by a crane y43 bythe wheels 42 o-n the track 41. The return movement is provided for by a weight 99 on a cable 100 which runs over a suitably supported vpulley 101 to the crane 43 where it is secured. The crossing. 50 carries a rod 102 with a piston in its end that` enters a suitable dash-pot 103 suspended from the frame o-f the machine 2, and preferably trunnioned, sof as to all'ow for any inequalities. The function of the dash-pot 103 is to cushionthe return movement of the crane 43 under the iniuence of the Aweight 99, and to prevent any jarring of the tion 104 on a table 105 to pass between certain rollers 106`on the table carried by lthe sill 49 in a manner which will be described angles to this slot so as to permit a projecbelow Additional rollers 107 are carried by the table and parallel to therollers 106 and separated therefrom by the slot, through which thesaw 58 passes. An additional slet of rollers 108 are'car'ried between the rollers 107\ and suitably supported from the crane 43 in any desired manner, solas not to interfere with the movement of the saw 58 on the crane 43, and this set of rollers 108 are adapted to coperate vwith the rollers 109 on the projection 104 and support the-plasterboard while the same is being severed by the saw 58. The precise mounting of the rollers 106, 107 and 1.08 is immaterial provided that it is suiicient and so no detailed description` is necessary.A

The rear end of the machine 2 is provided `with a table 105 with a projection 104 in its front on which suitable rollers 109 are mounted. The correct position of this table 105 is shown Vin Fig. 2. 'In Fig. 1 it is 'removed a little from the machine so as not to conceal parts thereof. The table 105 may be constructed of angle metal, as shown, or in any othersuitable manner. In addition to 110 at each side of the rollers 109 and long rollers 111 which serve to support the sev-'- ered plaster-board.

Where 1t gets its initial set to the rollers 108 'and 107 and thence Aover the rollers 106.

as shown in Fig. 1, but is at one side or the other. When the saw 58 starts its transverse movement, the plaster-board may be heldon the belt 3 and rollers by its own weight. However, as thismay not be suiicient and it lis preferable to clamp it in position so that it will be cut true and will not shift during the severing operation. The' clamps for ef- .Fig. 4 and designated 37. They are shown in detail in Figs. 8, 9 and 10. Another set form straddle the 'saw 58 at either limit of its movement. These magnets are connected nated generically by t-he character 37a.

The magnets 37 each comprise a casing 113 which is fixed to the upper 'chord 45 and at the forward end thereof in any suit-- able manner. The casings have levers 114 fulcrumed at 115 in brackets 116 extending.

Meanwhile the saw 58 is not in the center,-

fecting this are shown diagramatically inof clamps differing slightly -in style and the same as the magnets 37 and are desi-grollers 108 it is provided with short rollers The plaster-board 112 passes on the belt 3 i 4from the casing 113 and the rear ends of these levers 114 are connected by a suitable coil spring 117. The centers of these levers 114 are pivotally connected to cores 118 by means of suitable pins 119. These levers 114 pass through suitable guides120 and the forward ends of these levers are pivotally connected to plungers 121 by suitable pivots 122 and the rear ends of these plungers have suitable clamping faces 123 which are adapted to take under the belt 3 and over the plaster-board 112 and fix the two to.- getl'ier. The magnets 37 are simple solenoids with a bifurcated core 124 adapted to straddle the saw o8 and press the plastery board on a base 125 on which said solenoids correspond.

rest, and which is suitably slotted to permit the saw 58 to pass therethrough.

In view of the foregoing, the operation of my improved severing device will be readily understood. It operates beginning with the position of the crane 43 at the forward limit of its movement, and the saw 58 may then be at either side of the machine. This saw cuts continuously at any desired speed and always rotates in the same direction. The length of plaster-board between the two adjacent cuts depends entirely upon`the circumference of the roller 4 plus thethiclrness of the belt. 3 and the pitch circle of the rack 94 and segmental gear 91 is made to Assuming the parts to be in position to begin the first operation, it commences when a segment 91 strikes the projection 98 when the bars 12 and 13 have just begun to have contact with their respective brushes 22 and 23 thus completing the circuit through the armature 27 and starting switch 39. The circuit' through the switch 39 is soon broken by the movement of the crane 43 in the direction of movement of the plaster board but before this break occurs, the switch 38 is closed by the spring 87 upon the release'of the spring 85. As soon as this circuit is established, the magnetic clamps 37 and 37 a act automatically and continue to act until the circuit is broken at the disk 10. The rack 94 forces the crane 43 to move rearwardly simultanenously with the 'transverse movement of the saw 58 on its truck 56 which runs on the track 4,5 and continues to run until the sprlng 85 engages the horn 81 or the ho-rn 84, as the case 4may be,

and opens the crcuittln-ough the switch 38 at the contact 88.

IVhichever horn the spring 85 engages, the link 78, which forms a contact with the projection '88 as soon as the spring 85 gets away from the horn with.

gaged by their respective brushes 22 and 23, y

and then the rack'94- ceases to be engaged by the segmental gear 91. The cable 100 then acts because of the weight 99 and against the resistance of the dash-pot. 103 and draws the crane 43 and the parts remaining therewith back to the initial position, except that thesaw and its attendant mechanism is on the opposite side of the machine. The magnetic clamps release as soon as the bars 12 and 13 escape from their respective brushes. The parts of the cutter then remain at rest and the severed board is shoved forward over the, various rollers and is great-ly assisted in this movement by always being o-n some supporting rollers of the table 105 and the rollers 106 which in 'a sense overlap because of the projection 104 above described. There is no gap of varying length where the plasterboard is unsupported as there would be, iffthere were no projection 104. When the hars' 16 and 17 get under the brushes 23 and 2 4, the circuit is again complete through the armature 27, above described but in the opposite direction, and the switch 39 has been closed by the returnI movement of the crane 43. The switch 38 is open. rEhe reverse movement of thearmature 27 of t-he motor 26 reverses the direction of movement of the truck 56 that supports the saw 58 and causes the same to return to its initial position, when the Contact at 88 is brokenV as before, and the `movement of the truck 56 ceases immediately. lThere can be no further movement due to in'ertiabecause the Worm gear 72 cannot transmit power to drive the shaft 69 through the worm 70. The magnetic clamps 37 and 37a act the same as before. When the cut is finished and the magnet-ic clamps have released the plaster-board, the crane 43 and the parts carried thereby are returned to the initial and forward position by the cable 100 in the manner above described. The sequence of operations just above described, is repeated indefinitely as long as the machine is in operation, and it is obviousthat the transverse movement of the saw is accompanied by a longitudinal movement, so that the saw cuts true across the board without in any way disturbing the operation of the machine or interrupting the same.

While I have shown and, described one embodiment of my invention, it is obvious that it is not restricted thereto, but` is broad enough to cover all structures thatl come within the scope of the annexed claims.

What I claim is:

1. In a machine of the class described, a shaft, a disk with electrical contacts mounted on said disk, plaster-board supporting belt, a shaft, which also carries said disk, and a roller on said shaft, a crane mounted for movement in the'direction of the belt and in the opposite direction, means for mounting said crane, brushes and means for stqiporting the-same so they will engage saidcontacts on said disk, a saw, an electric motor and means for driving the same,

means for supporting said motor so .that Athe same may run transversely of said crane.

. said motor being shifted and controlled by portin 1 5- said brushes and contacts to cause the saw to sever plaster-board during the movement of the crane in the same direction as the ment of the belt While carrying the plasterboard or in the opposite direction, racks carried by said crane adapted to engage said segmental gears, 'said contacts and brushes being so related that While the gears are intermeshing some of the brushesand contacts are in' engagement, a saw, a motor and meansconnecting the same with the supporting mechanism of thesaw and electrical switches and contacts and conductors so arranged and disposed that said saw Will move transversely of the crane wliile the gears are in contact and not otherwise, so that the said saw cuts without-interfering with the forward movement of the plasterboard. o.

3. In a machine of the class described, a fixed frame carrying a contact, a shaft, a disk thereon carrying contacts, means for supporting brushes which are adapted to engage said disk contacts, a crane and means for supporting the same, segmental gears y and means for supporting the same, racks on said crane adapted to engage said gears whereby the said crane is 'moved for. a,short distance in one direction, means for moving said crane in the other direction, a sawcarried by said crane and adapted to move transversely thereof, a 'motor, a. windlass having a Worm gear and a Worm connected to said motor, cables connecting said saw supporting means vWherebythe savv is moved transversely of the crane and on the crane with the aid of said motor, means connected with said saw for opening the armature circuit of said motor whereby the movement of the saw transversely of the crane is terminated and a contact on said crane adapted to all times Without a engage the contact ou said fixed part so that said armature circuit may again be closed when the crane returns to its initial position, and while the opening means operated by the -saw is open, whereby the armature circuit may be closed so that the saw may be shifted in the opposite direction.

4. The combination With means for severing plaster-board, and means for causing such severing means to travel both transversely of and longitudinally with the plaster board, of a support through which the severing means travels transversely, comprising independent, vinterlapping means for supporting different portions trans-f 'versely of the plaster board, one of which supporting means moves With the severing means.

5.In a machine of the class described, a saw, a carriage carrying said saw, means for supporting said carriage so that it m'ay move'both transversely and longitudinally, means -for moving said carriage longitudinally in one direction, ml'eans for moving said carriage longitudinallyiin the other direction, rollers adjacent said saw and carlongitudinally ried by the carri-age supporting means and having an interrupted space and not 'eX- tending acrossv sald carriage supporting means, and a, fixed table having rollers projecting into said interrupted portion, so that the plaster boari will be supported at arge gap While being severed by the saw.

6. In a machine of the class described, a belt and means for supporting the same so that said belt may always run continuously and move plaster-board, a saw mounted for movement in the direction of said plasterboard and simultaneously transversely thereof to sever said plaster-board Without interrupting its movement, means for placingv said saw after it has severed a board so as to be ready for the next cut, a table adapted to receive the severed plaster-board with rollers carried therefrom, a saw carriage,

saw carriage supporting vmeans and rollers adjacent to said saw and carried by said carriage supporting means so as to be, on each side of the rollers supported by the table.

Signed at the city, county and State of NewYork, this 2d day of August, 1910.

IVID F. BERNHRDT.

lWitnesses:

GU'srAvii I. A RoNow, H. RADZINSKY.

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