US1349995A

US1349995A - Controlling system for metal-working machines

Info

Publication number: US1349995A
Authority: US
Inventors: Edward V Wurts; Bertram S Pero
Original assignee: STEEL UTILITIES Inc
Current assignee: STEEL UTILITIES Inc
Priority date: 1917-09-24
Filing date: 1917-09-24
Publication date: 1920-08-17
Anticipated expiration: 1937-08-17

Description

E. V. WURTS AND B. S. PERU.

CONTROLLING SYSTEM FOR METAL WORKING MACHINES.

APPLICATION FILED sEPT.24, 1917.

1 49,995, Patented Aug. 17, 1920.

5 SHEEISSHEET l.

I INVENTOH TTQRNEYS E. V. WURTS AND B. S. PERO. CONTROLLING SYSTEM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 24, I9] 7. 1,349,995, Patented Aug. 17,1920.

Po WIR LIA/5,5

INVENTOR ,4 ORNEIS E. V. WURTS AND B. S. PERO.

CONTROLLING SYSTEM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 24. I917.

Patented Aug. 17, 1920.

5 SHEETS-SHEET 3.

IN VE h TOR E. V. WURTS AND B. S. PERO. CONTROLLING SYSTEM FOR METAL WORKING MACHINES.

0 2 9 1 7 1 9 u A d 6 lu H 6 Lb a P 4 2 w m M H A w H P A 5 9 9 J 9 4 8 1 5 SHEEISSHEET 4.

INVENTOI? A ORNEYS E. V. WURTS AND B. S. PERO. CONTROLLING SYSTEM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 24, I9I7.

Patented Aug. 17, 1920.

5 SHEEISSHEET 5.

A TTORNEIS 4 UNITED STATES PATENT. OFFICE.

EDWARD V. .KTURTS, OF NEWARK, AND BERTRAM S. PERO, OF JERSEY CITY, NEW JERSEY, ASSIG-NORS T0 STEEL UTILITIES, INCORPORATED, A CORPORATION OF NEW. YORK.

CONTROLLING SYSTEM FOR METAL-WORKING MACHINES.

Specification of Letters Patent. Patented Aug, 17, 1920.

Application filed September 24, 1917. Serial No. 193,011.

Improvements in Controlling Systems for Metal-Working Machines, of which the following is a specification,

The invention relates to a controlling mechanism or system for a machine for punching structural shapes and like material or objects, although in certain of its aspects the mechanism or system is adaptable for use with other machines.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described; and the objects and advantages thereof will be set forth in part hereinafter,

'and in part will be obvious herefrom, or may be learned by practice with the invention.

The accompanying drawings. referred to herein and constituting a part hereof, illustrate one embodiment of the invention, the same serving in connection with the description to explain the principles thereof; the

drawings being diagrammatic in character. 'Of the drawings Figure 1 is a diagrammatic representatlon of the control for the distance determining means, that is, the mechanism for traveling and stopping the shape or other work relatively to the punch or other tool equipped means;

Fig. 2 is a diagrammatic representation of circuits and coiiperating devices for the con-' trol motor;

Fig. 3 is a similar representation of the safety, non-punch mechanism, and other devices; f

Fig. 4 is a similar representation of the circuits and cooperating partsfor returning the carriage by the operator; and

Fig. 5 is a similar representation of the circuits and cooperating parts operating and controlling the inch lock for advances in the same inch.

Fig. 6, is a view, largely diagrammatic,

showing the exemplary applicatlon of the controlling circuits shown in the preceding figures to a machin'elike that shown in Patent No. 1,241,258 to L. A. Hawthorne; and

Figs. 7 and 8 are like views showing the application of certain of the circuits to certain of the parts shown in Fig. 6. Referring to the accompanying drawings, illustrating by way of example one embodiment of the invention, it is shown applied to a machine for punching structural shapes or like articles or material, such as is shown and described in Patent No. 1,241,258 to Hawthorne, dated Sept. 25, 1917, or in Patent No. 1,311,276 to Hawthorne and Pero dated July 29, 1919. Certain parts of the mach nes of said two prior patents areshown herein and referred to 'so as to make' clear the application of the present invention to the machines of said patents and its cooperation therewith.

In the accompanying drawings, the motor 2 corresponds to motor 7, which drives the rolls 1 of said Patent No. 1,241,258. The contacts 16 in the present case correspond to the contacts 61 in rail of prior Patent No. 1,241,258; and shoe 20 herein corresponds to shoe 62 of said patent, and shoe 17 herein corresponds to shoe 132 of Patent No.

1,241,258 and trolley 18 herein corresponds to trolley 133 and trolley 21 herein to trolley 115 in said patent. The foregoing are part of the foot and inch measuring mechanism,

which controls the projection and retraction of the interponent 46 and of the slow-down mechanism for the work of the Hawthorne machine. a

In the present case, 20 represents a traveling contact or shoe corresponding to shoe 62, and the cooperating trolley 21 herein corresponds to trolley 115, and 33 herein represents a control motor corresponding to motor in the Hawthorne patent. Herein numeral 40 represents the bank of contacts and associated parts which cotiperate with the distance record sheet a, and correspond to 66, 67, 68, 108, 109 and 139 in the Haw 70 herein and54 in the Hawthorne patent;-

these being mounted on a head or carriage 81 herein and 25 in the said patent.

of solenoids for inch stop pins nun 1-.

rou ered 92 in the Hawthorne patent.

Referring more particularly to Fig. 1 herein, which shows more especially the controlling system .and devices for the motor the zero tens of feet circuit.

driving the roll table or work progressing rolls, and provides for the starting and. stopping thereof and for high and slow speed and for acceleration and retardation.

The main line contactor or circuit-controlling device for roll-driving motor 2 is indicated by 1, and 3 is a contactor connecting motor 2 to a part of a resistance 6. 4 is a contactor, operating on series current, with ma etic retardation, and it short circuits resistance 5, which is a series starting resistance for motor 2.

Resistance 6 is used for speed regulation of the motor 2. 7 is a contactor connectin resistance 6 to motor 2, for slow speed, and 8 is a series contactor cutting out a part of resistance 6 for slow speed of motor 2. Contactor 8 is energized byseries current of distance-determining or control motor 33. 9 is a contactor which connects power line 231 through control circuits to line contactor-s 1, 25 and 32 which control the power circuits for

motors

2 and 33. 10 is a contactor for-safety arrangement in the aforesaid

control circuitto motors

2 and 33.

11 is a group of contactors which energize the particular unit in the selected group of tens of feet, and 12 is a contactor for 13 is a contactor in the group 41, which represents any ten feet group, as from O to 9 feet, for instance. 14 is a relay for the last, or highest foot segment. 15 is a contactor normally making connections for high speed, and when energized, making connections for slow speed of work progressing motor 2.

A few of the foot segments are indicated by 16, and 17 is a contact bar or traveling shoe on a carriage or head'traveling with the work, and operating to slow down motor 2. 18 is a trolley on said carriage or head for the circuit made by shoe 17. 19 is a contactor for holding the circuit made by contact bar or shoe 17 after 17 passes out of engagement with a

foot segment

16, and 20 is a contactbar or shoe on the carriage, and following shoe 17 for operation of the motor 33. 21 is a trolley on the head or carriage for the circuit made by contact shoe 20.

22 is .a group of contactors energizing the inch pin solenoids and the stop contacts 23. 23 is a'group of stop contacts, located on the machine, and operated by cam 29, and being generally similar in construction and operation to those shown in application Ser.

No. 166,585 of Hawthorne and-Pero filed May 5th, 1917. 24 is a group of contacts, for slow speed, located on the machine, and operated by cam (see Fig. 2) and similar in construction and operation to contacts 23 in the Hawthorne and Pero case.

25 is a contactor in main line circuit of .motor 33, for forward rotation of the mo- .operates successive y the stop contacts 23.

- 30 is a limit switch controlling coil circult of

contactor

10 and 31 is a tappet, .on the sixteenth-of-an-inch disk or slot and o crates limit switch 30. I

Be erring more-particularly to the circuits for the distance determiningor control motor, and to the connections for starting, high speed, slow s eed, and stopping, 321s a contactor contro ling main line cirplate,

cuit of motor 33 for reverse rotation. The

for extra slow speed of motor 33. 37 is a contactor making a holding circuit for contactor 35. 38 is a contactor connecting forward or reverse contactors 25 and 32 for motor 33.

39 is a contactor which'operates contactor 13 in the tens of feet group. 40 is an automatic keyboard or bank of contacts for distance record sheet a. 41 is a oup of ten .contactors for tens of feet, 0 'which contactor 13 is one, and 42 is a resistance in the coil circuit of contactor group 41. 43 is a contactor in the punch controlling circuits.

Referring more especially to the diagram of connections for safety, non-punch arrangements, shown more particularly in Fig. 3, 44 is, a web punch starting solenoid and 45 is a flange punch starting solenoid. 46 is a contactor for the web punch solenoid circuit, and 47 is a contactor for the flange punch solenoid circuit. 48 is a contactor in circuit of

clutch solenoid

49 and 50 is the clutch solenoid resistance, which is cut in or cut'out by contactor 51. 53 is a mechanical switch on clutch controlling coil circuit of contactor 51. 52 is a tap on speed-control resistance 34. (See Fig. 4.)

54 is a contactor operated by a limit switch 55 (-Fig. 2), which limit switch is in turn closed by tappet 113, when the mechamechanism from returning to zero, when the next succeeding reading is in the same foot. 57 is a group of sixteen contactors, energizing the sixteenth of-an-inch stop fiin solenoids (marked 102 in Patent 0-. 1,241,258). 58 is a group of sixteen solenoids for the sixteenths-of-an inch sto pins (marked 101 in Patent No. 1,241,258). 59 is agroup of eleven solenoids for the inch stop pins (marked 91 in Patent No. 1,241,258). 1

60 is a slow down cam traveling with or proportionally to the work, and operating contacts 24. 61 is a limit switch which opens for over-travel of the sixteenthssofan-inch slot disk (numbered 88 in Patent No. 1,241,258). 62 is a mechanical switch which is opened while distance record sheet is advanced in keyboard or between the contacts. 63 is a contactor, with dash pot retardation, operated by switch 62 (which is a switch 122 in Patent No. 1,241,259, dated Sept. 25, 1917), through hand switch 92. 64 is a normally closed contactor, which controls coil circuit of contactor 65. 65 is a contactor controlling the circuit to solenoids 58 and 59. 66 is a contactor controlling coil circuit of contactor 67. 67 is a contactor, connecting a 30 volt control circuit to the various control mechanisms when the control or distance determining mechanism is connected for forward travel.

68 is a switch, operated by cam 60, and it connects slow speed for return to zero of the screw shaft (marked 40 in Patent No. 1,241,258) or equivalent device. 69 is a trolley on the carriage or head connecting one side of latch solenoid 70 to line 301 (which solenoid is numbered 63 in Patent No. 1,241,258). See also Fig. 4. 71 is a tappet which operates limit-switch 61, and is located on disk 88 of Patent No. 1,241,258. 72 (see Fig. 3) is a hand-operated switch for deenergizing punch solenoids 44 and 45.

Referring to the wiring diagram, showing connections for carriage return by hand, and referring'especially to Fig. 4, 73 is a contactor, energized by counter E. M. F., used to cut out a section of the starting resistance 34. 74 is a series contactor, with magnetic retardation, and is used to cut out the remainder of starting resistance 34. It has a shunt holding coil.

75 is a push button or other switch control station for the control or distancedetermining motor 33. 76 is a push button or other form of switch in control station 75, for reverse motion of motor 33,as hereinafter described. 77 is a push button or other form of switch in control station 75, for forward motion of motor 33, which operates similarly to? 6. 78 is a push button or other form of switch in control station 75, for slow speed rotation in either direction of the motor 33. 79 is a knife switch, functioning the same as push button 76. 80 1s a llmitswitch, operated by carriage 81 (corresponding ,to head 25 in Patent No. 1,241,258) cutting out control motor circuit on the return movement. 82 is a limit switch, closed by carriage 81 onreturn movement, for slow speed of motor 33. 83 1s a limit switch, opened by carriage 81 on return movement, to deenergize clutch sole-' noid 49 through contactor 84 on return to zero of the carriage. solenoid.

Referring now to the wirin diagram showing connections for the inc lock for advance in the same inch, shown especially 1n F 1g. 5, 86 is a contactor (set from a contact 1n keyboardor bank of contactors 40), Whlch is in the coil circuit of a contactor 87, controlling through its contacts the inch locking pin solenoid 88. 89 is a contactor, connectlng the circuits which give slow-speed of .motor 33, during the locking operation. 9.0 1s a segment placed beyond the last foot segment, for slowing down the workprogressmg motor 2, before reaching limit swltch 91. See Figs. 1 and 2.

Referrmg now to certain features and parts, shown in various figures of the draw- 1ngs: 91 is a limit switch, opened by carriage 81, on over travel thereof, to stop further travel and to stop punching of the work. See Figs. 2 and 3. 92'is a hand operated switch in coil circuit of contactor 63. See Fig. 2.

Referring now especially to Fig. 1 :93 is a tap on resistance 6, used for high speed, and 94 is a tap on resistance 6, used for slow speed, while 95 is a tap on resistance 6, used for extreme slow speed. Referring more particularly to Fig. 21-96 is one end of

resistance

34, and 97, 98 and 99 are taps on

resistance

34, and 100 is the other end of resistance 34.

' 101 is a contact on keyboard or contact bank 40, for preventing return to zero of the inch mechanism when making a successive reading in the same foot. 102 is one of a group ofsixteen contacts, on keyboard or bank 40, for the. sixteenths-of-an-inch stop pin solenoids, and 103 is one of a group of eleven contacts on the keyboard or bank 40, for the inch stop pin solenoids. 104 is one of a group of ten contacts on keyboard or bank 40, for foot settings, and 105 is one of a group of contacts on keyboard or bank 40, for tens of feet settings.

106 is a contact on keyboard or bank 40, for the web punch solenoid or other form of starter. See also Fig. 3. 107 is a contact, on thekeyboard or bank 40, for the flange punch clutch solenoid or other form of starter. See also Fig. 3. 108 is one of a group of contacts on keyboard or bank 40 is the clutch latch for setting the gags for the punches. 109

is a connection from contact 106, Fig. 2, to solenoid 46, Fig. 3. 110 is a' connection from contact 107, Fig. 2 to contactor 47, Fig. 3. 111 is a contactor closing circuit of punch gag solenold 112, see Fig. 2. 113 1s a ta pet .on the inch gear (marked 82, in Patent No. 1,241,258) for closing limit switch 55. 114 is a signal lamp for indicating any failure which might occur in effecting the inch measurement (see Flg. 2), and 115 is a similar signal or indicating lamp for the sixteenth-of-an-inch measurement. See Fig. 3.

230 is one line of the 230 volt-source of power, and 231 is the other line thereof. 300 is one line of the 30 volt source of power, and 301 is the other line thereof.

The foot contacts 16 are connected as follows: The group of contactors l1 energize like units in each group of ten feet contacts 16. That is, one contactor energizes foot contacts 16, for instance, for 29 feet, 19'

feet and 9 feet, and the other nines in all the groups of ten, and one contactor energizes contacts 16, for 20, 10 and 0 feet, and so on. Each foot unit in each group of ten feet, as for instance 29 feet, 19 feet, 9 feet, is connected through a corresponding group of contactors 41, located, respectively, between each two such units in the successive groups. For example, there is a contactor 41 between 29 feet and 19 feet, another between 19 feet and 9 feet, and so on.

These contacts 16 are connected with contactors 41, so that any group of contactors 41, opening, will denergize all of them contacts 16 below the. numeral value of the group so opening. The system and referred to hereinbefore, operates substantially as follows: I

It will be understood that certain of the operations which are of necessity described sequentially occur simultaneously in the machine or are simultaneous in part.

Assuming the work to be at rest, and to start and bring the work to full speed, and then to slow down and bring the work to rest in the desired or measured position with respect to the punching mechanism or other tool-equipped means, the operation would be r To set the inch and simteenths-of-(m-z'neh stop pins, and to start the work progressihg motor-2, and bring the work to full speed.

Upon closing switch 92, with the record sheet placed in the keyboard and the switch 62 closed, line 300 connects through switches 62 and 92. to one side of the coil of contactor 63. The other side of this coil connects through line 248, limit, switch 91 and

lines

159 and 160 to line 301, contactor 63 is mechanism described and energized. (See description Fig.2). This connects line 300, through line 120 (Fig. 1) and through

lines

143, 142, 141, contacts of one side of the coil of contactor ,9. The other side of the coil of contactor 9 connects contactor 67, lines 140 and 193 (Fig. 2), to

through line 184 (Fig. 2) and through dethereby closing said contactor 9. Contactor 9 in. closing connects line 231, through line 123 Fig. 1) and through lines 1 48, 149 and 150 Fig. 2), to one contact of contactor 10 through line 124. f

Assume the inch control mechanism to be at zero position. One side of the coil of contactor 66 is connected to line 300 through contactor 63 and line 143. The other side of the coil of contactor 66 connects to line 301 through line 155, switch 55 and

lines

158, 159 and 150 (Fig. 2). Switch 55 is closed only when mechanism has returned to zero. Switch 55 in closing, denoting zero position, also connects line 301 through

line

160, 159, 158, switch 55 and line 156 to one side of coil of contactor 54; the other side of coil of contactor 54 connects through line 202, contacts of contactor 63 and line 143 to 300, thereby closing contactor 54 which 163, and line 230 to one side of the coil of contactor 67 through line 164. The other side of the coil of contactor 67 J connects through line 165 to line 231, thus closing contactor 67. Contactor 67 connects line 300, through line 143, through contacts of contactor 63 and lines 142 and 141, to the common contacts of keyboard or contact.

bank 40, through

lines

140, 139, and 166 and also through line 139 and through the contacts of contactor 64, to one side of the coil of contactor '65. The other side of 'coil of contactor 65 connects through

lines

159 and 160 to line 301.

'Contactor 65 closes and through

lines

145, 161, 162 and 163, connects line 230, through contacts of contactor 66, through line 167, to contacts of contactors 22 and 57. It will be recalled that 22 represents a group of eleven contactors for the inch stop pin sole noids and 57 a group for the sixteenths-ofan-inch. One contactor ,in each of these groups 22 and '57 is closed from keyboard contacts 103 and 102, through

lines

168 and 169, line 301 being common, through

lines

159 and 160, to one sideof all of the abpve contactor coils.

The closing of contactor 22 completes the circuit in

lines

230, 145, 161, 162, 163, contacts of contactors 66 and 65, line 167, relay 22, and through 170, to one side of solenoid 59. The other side of solenoid 59' connects through

lines

149 and 148 to line 231, setting the inch pin.

The closing of contactor 57 completes the circuit through line 171 to solenoid 58, the other side of said solenoid being common with solenoid 59, setting the sixteenths-ofan-inch pin. Switch is closed, connecting 1 line '300 through contactor 63, and

lines

120, 125 and 126, to one side of the coil of contactor 10. The other side of the coil of con tactor 10 is connected, through line 122, to

line 301. This energizes contactor 10, which closes, and thus completes the circuit from line 231, through line 123, through contactor 9, through

lines

124 and 127, to one side of the coil of contactor 1. The other side of the coil of contactor 1 is connected to line 230 through line 128 and contacts of contactor 11, as later described. The closing of the contactor 1 connects line 230 to one side of roll driving motor 2, and also through line 129 to one end of the resistance 6. The other end of resistance 6 is connected through line 130 to line 231. v

Assume an energized foot contact 16 to be connected to line 300 (as will be described later) one side of coil of contactor 15 is connected through line 131 to line 301. The other side of coil of contactor 15 is connected through line l32 to contact bar or shoe 17 through trolley 18. As contact bar 17 has not yet advanced to engage the ener gized foot segment 16 (which has been selectively energized from the distance record sheet a) contactor 15 will be in denergized position, and will connect line 231 through line 130 to one side of coil or contactor 3, through line 133. The other side of coil of contactor 3 connects through denergized position contacts of -eo ntactor- 7 and

lines

134 and 129 to line 230. Contactor 3 is thereby energized, and in closing, connects tap 93 of resistance 6, through line 135, through resistance 5 and through series coil of contactor 4, and through line 136, to the other side of table motor 2, thereby starting the motor and progressing the work. As the motor accelerates, contactor 4 which is magnetically retarded closes, thereby short circuiting resistance 5, and bringing the motor 2 to high speed.

To energize theselected segznent for the requiz'ed feet of trowel, and to slow down motor 2.

When contact bar or shoe 17. engages the and 134, through line 137 and deenergizedposition contacts of contactor 3, to one side of the coil of contactor 7. The other side of the coil of contactor 7 is connected to line 231, thereby closing contactor 7. Contactor 7 in closing connects tap 94 of resistance 6 through

lines

138 and 136 to one side of motor 2. The other side of motor 2 is connected to line 230 through contacts of contactor 1 and to one end of resistance 6, and line-129. Motor 2 now runs at slow speed.

When contact bar 17 leaves energized segment 16, contact bar or shoe 20 will next engage said segment 16, thereby energizing coil of contactor 19 through trolley 21. Contactor 19 holds the connection of line 300 to one side of the coil of contactor 15 through line 132, thus holding slow speed. For extremely slow speed, contactor 8 is energized b the series current of motor 33 (Fig. 2). (ontactor 8, in closing, short circuits the resistance between tap 95 and the end of resistance 6 thereby further slowing down the speed of motor 2.

When the inch travel is completed, relay 27 is energized through contactor 67 by the closing of switch. 61 on the forward movement of the machine at the beginning of the travel for the sixteenths of an inch. The closing of relay 27 closes line 301, through lines 176, 177, and 183 (Fig. 2), to one side of the coil of contactor 28. The other side of the coil of contactor 28 is connected, through line 120 (Fig. l) and

lines

140, 141, 142, contacts of contactor 63 and line 143 (Fig. 2), to line 300. The energizing of contactor 28 opens the coil circuit of contactor 9, which through its contacts opens the coil circuit of contactor 1,

through'lines

124 and 127, thereby shutting down motor 2. Contactor 28, in closing, makes a holding circuit for its own coil.

To energize latch solenoid setting the ear-v m'age latch, and to start motor 33'07 the distance detemining mechanism.

by distance record sheet a) through lines out 16, line 300 is,connected tactor 66 for forward running of the work), across armature of motor 33. The contacts f .166, 139 and 140,-contacts of contactor 67 Contactor 35in closing, connects through (which is closed through contacts of

conlines

175 and 154 the coil of'contactor 37 through lines 141 and 142, contacts of conof contactor 37, through lines 17 6 and 177, tactor 63 and line 143, toline 300. connect line 301, through line :174, to the The engagement of contact bar or shoe 20 same side of thecoil of contactor 35 as conwith said energized segment16 connects line tacts 24 through contacts of contactor 67 300, through

lines

143, 142, 141, 140, 139, 240 line 173, contacts 24, line 172, relay 22, lines of solenoid 7 0, connecting through trolley 69 to line 301, energizes solenoid 70 and thereby and contacts of contactors 63, 67 11 and 41, 159 and 160 to line 301. This makes a holdto one side of solenoid 70. The-otherside mg circuit'for contactor 35.

' 'To'stop motor 33.

sets the carriage latch (which latch is numbered 46 in Patent No. 1,241,258). Contact bar also connects line 300, through trolley line 301 is connected through

lines

160 and 159 and contacts of contactor 22, and through a 21, and line 146, to one side'of the coil of lines 172,178, 179 and 180, through contacts co'ntactor 26. The other side of coil of c nof contactor 25, through line 181, contacts tactor 26 connects to line 301, thrcugh 11 e of contactor 26, and line 182 to one side of 147 and contacts of contactor 9, which closes the coil f rela;

27. The other .side of the contactor 26. vContactor 26 in closing, coil of'relay 2 connects through line 140 through lines 149 and 0, c c s line through contacts of contactor 67, lines 141 231, through contacts of

contactors

9 and 10, and 142, contacts of contactor 63, and line through

lines

124 and 186, respectively, and 143, to line 300, therebyenergizing relay 27,

through line 151, deenergized position 0011- which closes after a retardation which allows connected line 301 through line 172 to con- To slow down motor 33 and further 820w closes the energized contact 24, it connects line 301 through contacts of contac'tor'22 and through

lines

160, 159 and 172 and through. through line 183 and deenergized position tacts of contactor 32 and line 188, to one side the ixt nth -ofn-in h di t n to b of the coil of contactor 25. traveled.

The other side of the coil of contactor 25 The closing of relay 27 (a just described) connects to line 230, through line 152, 416- through line 183 connects line'301 through energized position contacts of contactor 38 lines 176 and 177 to one side of the coil of and line 145. This closes contactor 25, which contactor 28. The other side of the coil of connects line 230 to the. end 100 of resistance contactor 28 is connected to line 300 through 34, andconnects line 231 through line 153 to line 140, contacts of contactor 67, lines 141 one side of the control motor 33 and through and 142 and through contacts of contactor line 154 to end 96of resistance 34. The 63 and line 143,- thereby closing contactor other side of motor 33 connects to tap 99 of 28, which makes its own holding circuit by resistance 34. The control motor 33- starts connecting line 301'thro'ugh line 176 to upper at high speed. 1 contacts of contactor 28.

Contactor 28 thus closing, opens line 184 in the coil circuit of contactor 9, which con-' tactor through its contacts opens the coil circuits of contactor 26, through line 147, and contactor 25, through

lines

121, 186, 151 and 188,, thus stopping motor 33 of the distance control; 7

Relay 27 in closing also connects line 301,

' down motor 2. Y Contactor 22 in closing as described has tacts 23 and 24. When slow-down cam contacts of contac r 67 d ne 7 to 0 6 contacts of contactor 1 and line189' and deside of the coil of contactor 35.

' The other side of the coil of contactor 35, connects to line 300 through line 142, contactor 63 and line 143.

The closing of contactor 35 short circuits I the resistance between

taps

96 and 97 of resistance 34 through the-series coil of contactor 8. ontactor 36 has its coil connected across armature of motor 33, operating on counter E. M. F. If motor 33 has been running high speed long enough to get-u to speed, contactor 36 will close, and will s circuit, through its contacts, between taps 97 and 98 of resistance 34, thereby causing a slower speedof the motor.

The control motor '33 slows down, and the closin of contactor 8furthc1t SIQW down the ta le motor 2.

ort-

energized position contacts of contactor 25 and line 190, to one side of the coils of contactors 43 and 48. The other side of coils of contactors 43 and 48 connects through line 191, through limit switch 61 and through

lines

192 and 193, and 140 and contacts of contactor 67 and lines 141-and 142, and contacts of contactor 63 and line 143 to line 300,

When cam 29 closes energized contact 23,

' shown aswire 109. The other side of the sition.

The other side of coil of contactor 46 is coil of contactor 47 is shown as wire'110.

Referring again 'to Fig. 2: Wire '109, through keyboard or bank contact 106, con-. nects through

lines

166, 139 and 140, contacts of contactor 67, lines 141 and 142, and contacts of contactor 63 and line 143- to line 300. Wire 110, through keyboard contact \107 and similarly through contacts of contactors 67 and 63, connects to line 300. This releases the punchingmechanism. 4

The correct punches have been previously set from the keyboard or bank contacts,\

through the distance record sheet, by having their respective gags placed in operative po- 7 The gag solenoid 112 (Fig. 2) is connected', through

lines

196, 149 and 148 to line 231 on one side,

and on the other side, through contacts of contactor 111, through lines 161 and 145 to line 230. One side of the coil of contactor 111 is connected, through

lines

158, 159 and 160, to line 301. The other side of coil of contactor 111 is connected to line 300, through keyboard contact 108 and through the contacts of contactors 67 and 63 through the circuit previously described.

. Motor 2 stops at the same time as motor 33, bythe closing of relay 27, and through the connections previously described. T 0 release latch and inch and sixteenth-o fem-z'noh stop Relay 27 in closing, also connects line 301' through line 197 to one side of the coil of contactor 64. The other side of the coil of contactor.64 is connected through

lines

139, 140 and contacts of contactors 67 and 63 to line 300, thus energizing contactor 64. .The

energizing of contactor 64 opens the coil A circuit of contactor 65, deenergizing the inch and sixteenths-of-an-inch, solenoids 58 and 59, in line 167 and'lines 170 and 171. This takes place at the same time as the closin of contactor 48 which has just been describe Contactor 48 in closing-see Fig. 3connects line 231, through

lines

198 and 199, through contacts of contactor '51 and line 200, to one side of solenoids 49. The other side of solenoids 49 connects through line 201 to line 230. When solenoid coils 49 are energized, switch 53 isopen, deenergizing contactor 51 and connecting resistance 50 in circuit to reduce the current in coils 49. The energizing of solenoid coils 49 opens the clutch and releases the stop pins, the solenoids coils-of which have been deenergizedfoot. Limit switch 55 Fig. 2) is open due to the advance of the mechanism. Line 300 connects to one side of the coil of con tactor 63 when switch 62 is closed. This closes contactor 63 and through line 143 connects line 300 through line 202, deenergized position'con-tacts of contactor '56 and line 203 to one side of the coil of contactor 38. The-other side of the coil of contactor 38 connects,.th rou'gh line 204, deenergized position contacts of contactor 54, and through,

lines

157, 301, thus closing contactor 38. Contactors 54 and 66 cannot close, due to limit switch 55 r and contactor switch 56 being open; therefore contactor 67 cannot close. Y

Contactor 38 in closing connects line 230 through line 145 to one side of coil of contactor 32 through line 205. The other side of coil of contactor 32 connects'to line 231 through

lines

151 and 206, and contacts of contactor 38 and lines. 207 and 148. This closes contactor 32, which connects motor 33 and resistance 34 to line 230 and line 231,

as described above for for reverse rotation,

Contactor 67 being deenergized, one-side of coil of contactor 35 isconnected, through deenergized position contacts of contactor 67 and through line 208 and slow-down contact 68 and

lines

158, 159 and 160 to line 301, when cam 60 closes contact 68 on the return movement. The other side of coil of contactor 35 is connected through line 142, contact of contactor 63 and line 143 to line 300. This allows contactor'35 to close at a predetermined point, before the mechanism reaches the zero point. When the mechanism'reaches the zero position, tappet 113, closes limit switch 55, line 301,

lines

160, 159 and 158 through line 156, to one side of coil of contactor 54.

The other side of the coil of contactor 54 is connected through line 202through contact of contactor 63 and through line 143 to line 300. Contactor 54 closes, and deenergizes, through its contacts, the coil of contactor 38, in line 204, which in turn deenergizes the coil of contactor 32 through

lines

206 and 151. Contactor 38, through its deenergized position contacts and line 152, energizes the coil of contactor 25, for

contactor 25, except forward rotation of control or distance de-- 158, 159 and 160, to line which connects itself and a short circuit around switch 55,

completes the circuit from line 301 to contactor 66, which in turn closes contactors 67, 65, etc., as described above.

Referring now to the locking arrangement for advance or feed of the work in the same inch for the next punching or like operation (se F g",

' previous reading, to prevent the return of disk 86 to zero or initial position. One side of the coil of contactor 86 is connected to a keyboard or bank contact, which connects to line 300,through one contact of group 40,

line 166, line 139, line 140, upper contacts of relay 67, line 141, line 142, contacts of relay 63, and line 143. The other side of the coil of contactor 86 connects to line 301. This energizes the coil of contactor 86 in the previous reading.

When the energized stop contact 23 closes line 301 is connected through contacts 0 contactor 86, through line 210, to one side of coils of

contactors

87 and 89. The other side of coils of

contactors

87 and 89 is connected to line 300. When the inch slot moves into engagement with the set inch pin, and energized contact 23 ,is closed by cam 29,

contactors

87 and 89 are. energized.

Contactor 87 connects line 231 to locking pin solenoid 88. The. other side of solenoid coil 88 is connected toline 230. (o'ntactor 87 in closing also makes its own holding circuit through line 209, a normally closed interlock on contactor 65, and

lines

243 and 210.

.By referring to Fig. 2 it will be seen that contactor 65 is deenergized by the closing of relay 27 and contactor 64, before contactor 86 opens. Such prior opening of contactor 65 is effected by contactor 27, which in closing energizes relay 64, which in turn deenergizes coil of relay 65, thereby opening the relay. Relay 86 gets its current through the keyboard or distance record sheet, and through contacts of relay 63, which relay is controlled by the mechanical switch 62. Switch 62 is operated from the main shaft of the punch, which has been set in motion by the closing of relay 27. There is therefore an appreciable lag or pause before relay 86 can be opened. Therefore, the holding circuit of contactor 87 is held by its own contacts, through the deenergized position contacts of contactor 65, and line 209 back to line 301. a This holds locking pin solenoid 88 closed while the distance record sheet is advancing to the next setting.

Contactor 87 in closing also bridges contacts of limit switch 30 as explained later herein. Limit switch 30 must be closed, or

bridged, before the control or distance determining mechanism can go ahead, that is, it insures that the inch determining mecha nism has'returned to zero or initial position. When, however, the inch lock pin 88 is used, the limit switch cannot close, and is bridged by the lower contacts of relay 87, and the machine starts forward from its last position (see Fig. 5), The coil of the contactor 89, being connected in parallel with the coil of contactor 87, also holds closed as long as 87' is held. Contactor 89 connects line 301 and line 209 to one side of the coil'of contactor 35, making positive the closing of contactor 35, (after contactor 63 has closed) which connects slow speed on motor 33, even though cam 60. has moved past the energized slow contact 24.

After the distance record sheet has advanced, and contactor 63 closes, contactors 65, 22 and 67 are energized, connecting the v sameinch solenoid as was set in the preceding reading, and at the same time deenergizing the locking pin solenoid 88 by openmg the coil circult of contactor 87 and the mechanism completes its travel as before.

Referring now to the safety features for guarding against failure of feet or tens of feet to function (See Fig. 1;)

If contactors'12, 13, 14 or 11 fail to function, due to keyboard or bank contacts fail-' ing, or the relay coilcircuit failing, the work progressing motor 2 cannot start.

The failure of contactor 12, 13 (which contactor is normally closed) or 14 prevents contactor 9 from closing. In case contactor 9 should close, and the unit contactor 11 fails, the coil circuit for table motor control,

(which is contactor 1,) would be broken through contacts of contactor 11.

Contactors 12, 13 and 14 failing and preventing contactor 9 from closing, also hold up contactor 26, see Fig. 2preventing the completion of the circuit to coil of contactor 25, and the control motor 33 likewise cannot start. The failure of contactor 11 to close also prevents contactor 26. from closing, and motor 33 from starting, by reason of foot segment 16, not being energized except when one of the contactors'of group 11 is closed.

Should mm inch sto pin stick or fail to re ase. Referring again to Fig. 1: If limit switch 30 1s not closed by tappet 31, after a reading has been made, which would happen should an inch stop pin stick or fail to release,

contactor 10 could not close, which would hold open the circuit of contactor 1, preventing the starting of work progressing motor 2. w

In Fig. 2, the failure of contactor 10 will hold open the circuit of contactor '25 thus preventing the start of control motor 33.

f the motors 2 and-33 have started, and the inch stop pin fails to engage its slot, the control or distance determmm mechanism advances until cam 60 closes t e eleven inch contact 24, thus slowing down the control motor 33. As the eleven inch contact 23 is energized only when the eleven inch contactor 22 is closed, the motors will continue to run at slow speed. The engagement of the eleven inch stop pin. in 1ts slot arrests the mechanism.

The dash pot retardation of relay 27 prevents the relay from closing while cam 29 is passing over the energized contact 23 for the set inch. .When cam 29 closes contact 23 for eleven inches, a lower inch contact being energized, a circuit is made from line 301, through

lines

160, 159, 241 and 242, through indicating or. signal lamp 114, through contact 23 through

lines

178, 179 and 180 and contactor 25, through line 181, and contact of contactor 26, through line 182 and coil of relay 27, through line 140 and contact of contactor 67 and through line 141 and 142 through contact of contactor 63 and line 143, to line 300, causing the indicating lamp 114 to glow. The current taken by the lamp is of a value that will not cause relay 27 to operate.

Should a siateenth-of-an-z'mh stop pin stick or fail to release.

61, in opening, makes a circuit from line 300 through line 143, through contacts of contactor 63, and contacts of contactor 67 through

lines

140, 192 and 251, to one side of indicating or Signal lamp 115. The other side of the lamp is connected to line 301 through line 242, causing lamp to glow. Should the latch fall to engage the screw shaft.

Should work progressing motor 2 start and the latch fail to engage the screw shaft, the head or carriage will be pushed along until contact bar or shoe 17 (Fig. 1) engages segment 90. Referring to Fig. 2, segment 90 connects through lines 193 and. 140 and contacts of contactors 67 and 63 to line 300. Motor 2 will then slow down as described above.

Referring to Figs. 2 and 3, carriage 81 will operate limit switch 91, opening line 248 in the coil circuit of contactor 63, and disconnecting the control circuit from the motors.

Referring now more especially to the carriage return by hand (Fig. 4)

When button 76 of switch station 75 is operated, it connects line 230 through line 211 to one side of coil of contactor 32. The

other side of coil of contactor 32 is connected through contacts of contactor 26 and line 212 to line 231. Contactor 26 is in closed position. One side of itscoil is connected to line 300, through line 213, and the other side of the coil to line 301, through line 147, contacts of contactor 9 and line 28 and line 215, to line 301. Contactor 28 is deenergized. Contactor 32 closes, connecting line 231 through end 100 of resistance 34 and line 216 to one side of motor 33, and to one side of series coil of contactor 74. P

The other side of motor 33 connects to line 230. The coil of contactor 73 is connected across armature of motor 33, one side through line 217, the deenergized position contacts of contactor 36 and line 218, and the other side through line 219, contacts of contactor 32, line 220, through up or normal position of switch 78, through line 221, and through deenergized position contacts of contactor 35 and line 2221 Contactor 73 operates on counter E. M. F. and will therefore close at a predetermined point, connecting through its contacts, line 231, through contacts of contactor 32, through end 100 of resistance 34, through tap 52, and through series 'coil of contactor 74, to one side of control motor Resistance between taps 99 and 52 on resistance 34 has been cut out.. Current is now flowing through series coil of contactor 74, and this contactor will close, after a magnetic retardation, connecting line 231 directly to one side of control motor 33. When contactor 74 closes, it short circuits its series coil, and connects its shunt holding coil in connected to tap 97 of resistance 34. The

other side of motor 33 is connected to tap 99 of resistance 34, and line 231 is connected to end 100 of resistance 34, giving slow speed. To return the carriage or head to the zero position, switch 79 is closed, preferably by hand, closing contactor 32, which connects motor 33 in the reverse direction. Push button 76 in station 75 functions the same as switch 79, except that it is independent of limit switch 80. I

When the carriage 81-reaches limit switch 80, contactor 32 is deenergizedin lines 224 and 211, dropping out contactors 73 and 74,

and cutting power off from the motor 33. The motor drifts untilcarriage or head 81 engages the limit switch 82. Limit switch 82 is in parallel with the lower contacts of button 78, and contactor is energized for slow speed. At the instant that limit switch 82 operates, carriage 81 passes off from limit switch 80, allowing the switch to close, and throw the motor on the line with the above-described slow-speed connections.

When switches are thrown for. hand return of carriage, latch solenoid 70 is' connected through trolley 69 to line 301, and through trolley 21 to line 300, stifling tie latch. 'One side of the coil of contactor 84 is connected throu h line 225 to line 301, and

' the other side t rough line 226v and limit switch 83 to line 300, closing contactor 84 (Fig. 4). The'coil of contactor 51 is con- I nected to line 301, and through switch 53 to line 300, energizing contactor 51, which 7 short circuits resistance 50. This connects one side of solenoids 49, through contacts of contactor 51, through contacts 'of contactor 84 and

lines

227 and 212, to line 231. The other side of solenoids 49 and one side of solenoid 85 are connected through line 228"to line 230. The other side of solenoid 85 is connected through

lines

227 and 212 to line 231. Solenoids 49 and 85 are there-- by energized, and solenoids 49, in operating the screw shaft clutch, to disengage the distance determining mechanism therefrom,

open switch 53, which opens the coil circuit of contactor 51, cutting resistance in circuit, and reducing the current throug solenoids 49. r,

Solenoid 85 operates the clutch latch or other releasing mechanism. This clutch latch is a device for permitting the easing of the main clutch, operated by solenoid 49. Thus the pressure is eased off the inch and sixteen stop pins, while preventing the clutch disconnecting .and thereby destro ing the relation between the screw sha t 40 (Fig. 6) and the inch determining mechanism. When solenoid 85 is energized, the clutch can be disengaged. When solenoid 85 is not energized, the clutch can be only partly disengaged, giving back lash or lost motion, for the easy release of the previously set stop pins.

When carriage 81 reaches the zero feet position, limit switch 83'is engaged, opening line 229 in the coil circuit of contactor 84, which deenergizes solenoids 49, allowing the clutch to drop into engaging position. The machine now stands ready to start with a Speed controls.

The work progressing means has a high speed, which is effected through speed regulation of the motor 2, and an intermediate or slow speed which is harmonized with the high speed of the screw shaft, or equivalent slower speed of the screw shaft, and of the motor 33. Thus the" movements and operations of the work progressing means and the distance determining means are coordinated and harmonized, and in the present embodi- 'ment this is effected by resistances and automatic controls therefor in circuit with the two

motors

2 and 33, and the work is thus handled at the most efiicient speed and in the best or most advisable way.

Undesirable acceleration of the work when the feed or travel between successive punchings or other operations is very short, as for instance, within the same foot or inch, is prevented, as already. ointed out in detail. This is effected, as embo ied, by the contactor and cotiper'ating devices which hold the slow- 7 down circuit afterthe shoe has passed out of contact with the energized foot contact, which contactor is energized by the second or following shoe.

The acceleration device or mechanismis prevented from operating when the retardation device has begun tooperate first. due to electrical interlocks between the contactors, operated preferably by the contactors themselves, and one contactor cannot close until the other is open, as already explained in detail.

In connection with the exemplary showing of Figs. 6, 7 and 8 of the application of the control system to a machine like that of the Hawthorne Patent No. 1,241,258, previously referred to, the operation of the mechanism for a typical distance reading or set-- ting for a desired travel of the structural 1shape or other work, is substantially as folows (The reference numerals used in parentheses herein correspond to the numerals applied to the same parts in the Hawthorne atent No. 1,241,258, and where the corresponding parts are previously described in 115 this case, the reference numerals therefor are used in con'unction with the numerals in parentheses rom the Hawthorne patent.- This is believed to be the briefest and clearest way of connecting up the two devices by 120 description.)

For the purpose of generally correlating Figs. 6, 7 and 8, with the Hawthorne patent,

screw shaft 253 (40). This determines the" number of feet of travel, and the subsequent" rotation of screw shaft 253 (40) determines the travel for inches and fractions thereof. (This is taken as a typical example of operation, but the machine will feed for successive inches or fractions of an inch within the same foot by the latch reengaging the screw shaft after the required hole is punched). Thesolenoid 7 0 (54) is energized from the live foot contact 16 (61) carried on bar 254 (60). shoe 17 (132) slide along contacts 16 (61).

A group of the units of feet contacts 11 and a group of the tens of feet contacts 41 are shown in the upper part of Fig. 6, which will serve to connect this part of the figure to the diagrams of the preceding figures. The trolley 18 (133) is shown with clrcuit connections to contactor 15 for slow-down of motor 2 (7); and trolley 21 (115) is shown with connections to contactor 26 for starting screw shaft motor 33 (80), the details thereof being already described in this case.

Pinion 258 (81) on screw shaft 253 (40) meshes with gear 255 (82) of the inch-determining mechanism. Stop pin disk 256 (86) carries the inch solenoids and stop pins shown as 59 (92) and 58 (102) as identifie in the present case. Disk 257 (88) co5perates with the sixteenths-of-an-inch stop pins, the solenoids forv which are identified herein as 58 (102).

' Referring to Fig. 6, the mechanical operation of the machine is as follows The beam 00 is impelled forward by the rolls 267 (1), driven by the work progressing motor 2 (7 As the beam or other work advances, it pushes against the bearing surface 260 (26) of the carriage or head 81 (25), which is thereby moved along its guideway, arran ed along the path of travel of the work. screw shaft 253 (40) is carried between guideway members 259 (16) closely adjacent to carriage 81 (25).

An engaging latch 251 (45), controlled through solenoid 70 (54), engages the shaft 253 (40) to arrest the travel of the carriage or head 81 (25), and thereby of the work a, at the completion of the integral number of feet of travel, as designated or selected by the distance record sheet a (68).

For fractions of a foot, or inches, and

sixteenths-of-an-inch (or other fractional parts) of travel, the rotation of screw shaft 253 (40), when driven by motor 33 (80) of the distance determining mechanism, is effected through electrical connections of contact bars or shoes 17 (132), and 20 (62), with selected segment 16 (61), carried in insulating bar 254 (60) and energized from the distance record sheet a (68).

These connections, as particularly de- Shoe 20 (62) and. d

.or disk 256 (86) throu h sleeve 263 scribed later, slow down the work progress-- mg notor 2 (7 and start motor 33 (80), causing the screw shaft 263 '(40), to rotate, thereby permitting a further advance of the carnage or head 81 (25) and the work 02. Gear wheel 255 (82), in mesh with pinion 258 ('81) on the screw shaft 253 (40), rotates 1n front of a set of twelve inch stop p ns 261 (91), which are selectively set by solenoids 59 (92) from the distance record sheet a (68). These ins are mounted in a isk or housing 256 86), ,and engage in a slot 262 (90), in the inner face or ear wheel 255 (82) for any desired inch 0 travel of the work w.

D1sk 257 (88) is connected with housing 87 and rotates therewith. n disk 257 (88 i s a set of slxteen slots 264 (100) of graduated length, for the sixteenths-of-an-inch of travel of the work an. Sixteen stop pins 265 (101) are mounted in a fixed housing 266 89) and are selectively set by solenoids 58 (102) from the distance record sheet a. (68). As the latch or engaging member 251 (45) engages the screw shaft 253 (40), and the work progressing motor 2 (7) is brought to slow speed, and the motor 33 (80) of the distance determining mechanism starts, thereby startin the screw shaft 253 (40), p nion 258 (81 and gear wheel 255 (82) w1ll rotate, permitting the work or beam w to push the carriage or head 81 (25) along as permitted by the screw 253 (40). When the slot 262 (90) in gear wheel 255 (82) engages the set stop pin 261 (91) for the selected inch of travel, housing or disk 256 (86) and disk 257 (88) rotate with gear wheel 255 (82), the work a: still advancing, until set stop pin 265 101) for the selected sixteenths-of-an-inch of travel, meets the end of its particular slot 264 in disk 257 (88). This finally arrests the mechanism and effects the stop of the beam a: at the selected foot, inch, and sixteenths-of-aninch of travel.

To avoid the shock and strain of a sudden stop, the motors 2 (7 and 33 (80) are previously brought to .slow speed by connections made through slow-down contacts 24 (Fig. 2). These contacts 24 are mounted on the face of a fixed plate or disk 268 (Fig. 6) in such manner as to be closed consecutively by a cam 60 (Figs. 1, 2, 3 and 7) mounted on the ad'acent face of the gear wheel 255 (82). ontacts 23 (Figs. 1, 2 and 5), similarly mounted, and operated in like manner by cam 29 (Figs. 1, 2, 3, 5 and 7) on the gear wheel 255 (82) make the connections for opening the power circuits and contactors operating with retardation which allows the sixteenths-of-an-inch travel to be completed before the motors drift to rest with the work in the desired position.

It will be understood that the resent em bodiment is an exemplification 0 the invention and that changes may be made in the various details as shown and described without departing from the invention and without sacrificin its chief advantages.

What we claim as ur invention is 1. A controlling nd operating mechanism for a metal punching machine includingin combination a work progressing mo-- tor, circuit controlling devices coiiperating with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerate, retard and stop said motor in accordance with the reading of the distance record sheet.

2. A controlling and operating mecha- Y nism for a metal punching machine including in combination a work progressing motor, circuit controlling dev1ces cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerateand stop said motor in accordance with the reading of the distance record sheet.

3. A controlling and operating mechanism for a metal punching machine including in combination a work rogressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, retard and stop said motor in accordance with the reading of the distance record sheet.

4. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said contrdlling devices including a variable resistance, operating to start, accelerate, retard and stop said motor in accordance with the reading of the distance record sheet.

5. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices includ-- ing an automatically operated variable resistance, operating to start, accelerate, retard and stop said motor in accordance with the reading of the distance record sheet.

6. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devlces cooperating with a distance record sheet and devices in circuit with said controlling devices, operating to start, accelerate and stop said motor in accordance with the reading of'the dis into operation by the Work approaching the stopping point; the retarding action being controlled by the work approaching the stopping point.

8. A controlling and operating mechanism for a metal punching machine including in combination a work progressingmotor, circuit controlling devices cooperating with a distance record sheetand devices including a resistance in circuit with said controlling devices operating to start, retard and stop said motor in accordance with the reading of the distance record sheet, and taps on the resistance rendered operative'by the advancing work. i

9. A controlling and operating mechanism for a metal punching machine including in combination a work progressing mowith a distance record sheet and devices including-a resistance in circuit with said 0011- trolling devices operating to start, retard ing with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerate and stop said motor in accordance with the reading of the distance record sheet and means preventing acceleration when the travel of the work between successive stops is short.

11. A controlling and operating mechanism for a metal punching machine including in combination 'a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerate and stop said motor in accordance with the reading of the distance record sheet, and means preventing acceleration of the work until the work progressing motor has attained a predetermined speed.

12. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerate and stop said motor in accordance with the reading of the distance record sheet and controlling meansfor the acceleration device operating by counter E. M. F.

13. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, accelerate, retard and stop said motor in accordance with the reading of the distance recordsheet, and means for preventing the acceleration device operating when the retardation device has begun to operate first.

14. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, circuit controlling devices cooperating with a distance record sheet and devices in circuit with said controlling devices operating to start, retard and stop said motor in accordance with the reading of the distance record sheet, said devices including a resistance device operating to retard and carried into operation by the work approaching the stopping point, the retarding actionbeing controlled by the work approaching the stopping point, and means for preventing the acceleration devlces operating when the retardation devlce has begun to operate first.

15. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, a distance record sheet for determinin the variable travel of the work, and contro ing devices operating to start and to retard said motor, the retarding action being controlled by the work approaching the stopping point. 4

16. A controlling and operating mechanism for a metal punching machine includ ing in combinatlon a work progressing motor, a distance record sheet for determining the variable travel of the work, and electrically operated controlling devices op-. erating to start and to retard said motor, the retarding action being controlled by the work approaching the stopping point, and thereby closing a circuit of the controlling device. l

17. A controlling and operating mechanism for a metal punching machine including in combination a work progressing motor, a distance record sheet for deter mining the variable travel of the work, and

controlling devices, including an electric circuit and a resistance, operating to start and to retard said motor, the retarding action being controlled by the work approaching the stopping point, and a reslstance tap operated by the progressing work.

18.A controlling and operating mecha-.

nism lfor a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while determining a desired distance, and means which start and stop said motor.

19. A controlling and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while positioning the work for the punch, and means which start, accelerate, retard and stop said motor.

20. A controlling and operating mechanism for a metal punching machine includdevice, a motor operating the distance determining device while positioning the work for the punch, and means which operate electrically and automatically to start and stop said motor. I

23. A controlling and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while positioning the work .for the punch, and means which operate electricall and automatically to vary the speed of and to start and stop said motor.

24. A controlling and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while ositioning the work for the punch, ,means w ich retard and sto said motor and means for calling said retar ing device into operation by the work ap proaching the distance for which the d1stermining device While positioning the work and means for calling said retarding device into operation b the work closing a circuit at a point in de is set.

27. A controlling and operating mechanism for a metal punching machine includ-. ing in combination a distance determining device, a motor operating the distance determining device while positioning the work for the punch, and means which start and stop said motor and electrically operating means controlled by a distance record sheet for governing said motor.

28. A controlling and operating mechanism for a metal punching machine including in combination a distance determming device, a motor operating the distance determining device while positionmg the work for the punch, and means which start and stop said motor and means controlled by a distance record sheet for governing sa1d motor. I

29. A controlling and operating mechanism for a metal punching. machine including in combination a distance determining device, a motor operating the distance determ'ining device while positioning the work for the punch, and means which start and stop said motor and-restore the distance determining device.

30. A controlling and operating mechanism for a metal punching machine including in combinationa distance determining device, a motor operating the distance determining device while positioning the work I for the punch, and means which start, accelerate, retard, stop said motor and restore the distance determinin device.

31. A controlling an operating mechanism for a metal punching machine including in combination'a distance determining device, a'motor operating the distance determining device while positioning the work for the punch, and means which operate electrically to start, stop said motor and re store the distance determining device.

32. A controlling and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while positioning the work for the stop sai motor, said devices inclu ing it its relation to the distance for which the distance determining devlce' unch, and means which start and series of electricalcircuits representing devices including a series of electrical circuits representing distances of travel of the work andmeans whereby said circuits are rendered selectively operative by a distance record sheet.

34. Acontrolling-and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while positioning the work for the punch, and means which retard and stop said motor,said devices'includ ng a series of electrical circuits representmg distances of travel of the work and 'means whereby said circuits are rendered selectively operative by a distance record sheet.

- 35. A controlling and operating mechanism for a metal punching machine including in combination 'a distance determinin device, a motor operating the distance etermining devicewhile positioning the work for the punch, and means which start and stop said motor, said stoppin means including an automatically variable 'resistance.

36. A controlling and operating mecha nism for a metal punching machine including in combination a distance determining device, a motor operating the distance determining device while positioning the work for the punch, and means which start and stop said motor, said stopping means 'including an automatically variable resistance, and taps for said resistance controlled by the advancin work.

37. A control ing and operating mechanism for a metal punching machine including in combination a distance determining device, a motor operating the distance deto stop at the point for which the distance determining means is set.

39. A controlling and operating mechanism for a metal punching machine including in combination distance determining means and means preventing the punch operating on the work should the Work fail to stop at the point for which the distance determining means is set, and signal means for indicating such a failure.

40. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, and means for controlling the progress of the work including a plurality of electrical devices, including means for modifying the action of the distance determlning means dependent on whether the next succeeding measurement is in the same foot or unit or not.

41. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, and means for preventing the punching of the work if the fraction of a unit distance mechanism fails.

42. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, and means for preventing the punching of the work if the fraction of a unit distance mechanism fails, and signal means for indicating such failure.

43. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, and means preventing the punch operating on the work should the work fail to stop at the point for which the distance determining means is set and means for arresting the progress of the work.

44. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, and means for controlling the progress of the work including a plurality of electrical devices including means for modifying the action of the distance determining means dependent on whether the next succeeding measurement is in the same foot or unit or not, and means for preventing intermediate restoring of the device.

45. A controlling and operating mechanism for a metal punching machine including in combination a motor operating a distance determining device, and means which start and stop said motor, said means including a plurality of contacts representing distance values and controlling the motor circuit.

46. A controlling and operating mechanism for a metal punching machine including in combination a motor operating a distance determining device, and means which start and stop said motor, said means including a plurality of contacts representing a unit of distance value in the succession of groups of tens of units of distance values.

47. A controlling and operating mecha nism for a metal punching machine including in combination a motor and connections therefor controlling work progressing means, distance determining means and a motor therefor, and means preventing the punching means operating unless both said motors are functioning.

48. A controlling and operating mechanism for a metal punching machine including in combination a motor and connections therefor controlling work progressing means, distance determining means and a motor therefor, and means for stopping both said motors just at the time of punching.

49. A controlling and operating mechanism for a metal punching machine including in combination a motor driving the work progressing means, a motor operating a distance determining device, and connections controlled by a distance record device for harmoniously controlling the two motors.

50. A controlling and operating mechanism for a metal punching machine including in combination distance determining means, a distance record device controlling same, means for stopping the work controlled by the distance determining means, and means for starting the punch when the work is stopped at the determined distance.

51. A controlling and operating mechanism for a metal punching machine including in combination distance determining means for stopping the work at a selected and predetermined distance, a distance record sheet controlling the distance determining means, and means preventing the operation of the distance determining means while the distance record sheet is being fed forward for a new reading.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses.

EDWARD V. WURTS. BERTRAM S. PERO.

Witnesses:

JoHN D. MORGAN, MAYBELLE C. SMITH.