US2120714A

US2120714A - Printing or other machine

Info

Publication number: US2120714A
Application number: US84678A
Authority: US
Inventors: Walter C Scott
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-06-11
Filing date: 1936-06-11
Publication date: 1938-06-14
Anticipated expiration: 1955-06-14

Description

June 14, 1938. w. c. scoTT 2,120,714

PRINTING OR OTHER MACHINE Filed June 11, 1936 2 Sheets-Sheet l INVENTOR ATTORN EY June 14, 1938. w. c. scoTT PRINTING OR OTHER MACHINE Filed June 11, 1936 2 Sheets-Sheet 2 INVENTOR (1 62m? Waller ATTO R N EY Patented June 14, 1938 UNITED STATES PATENT OFFICE 20 Claims.

Fig. 3 is a transverse sectional view substantially on the plane of line 3-3 of Fig.

Referring to Fig. 1, A and B indicate a plurality of devices or units. For the purpose of arbitrarily distinguishing between these devices, A will be referred to as the primary device, and B as secondary" devices. In the present case the plurality of devices or units is greater than. two, and consist of the printing and folding units of a printing machine, the folding unit A of which constitutes here the primary device and the printing and perfecting units or couples B of which constitute here the secondary devices. It is unnecessary to describe theoperation of a machine of this character except to say that webs are led to the printing couples and are thereafter associated and folded in the folding mechanism known as a former folder.

So far as certain features of the invention are concerned, the speed control mechanism may take many forms but, preferably, the control mechanism disclosed and claimed in my application Ser. No. 60,423, filed January 23, 1936, will be utilized because, owing to its simplicity and effectiveness, it constitutes an almost ideal mechanism for use in connection with a printing or other machine where the speed of a plurality of units greater than two is to be coordinated. As a matter of convenience, therefore, and for the purpose of bringing out certain features of the invention, the particular control mechanism here employed will now be described, it being understood that the invention in all its aspects is not limited to the control mechanism so described.

The control mechanism is indicated by O and it will be noted that there is a separate control mechanism associated with each of the secondary units or devices and, as will presently be explained, all the control mechanisms are associated with the primary device or unit. Each control mechanism consists of two control members x and Y arranged side by side and inde- 4 is deeper than the other end 5.

It will be understood that, when bails and Y apart.

pendently rotatable in the same direction on supporting shaft 6. At least one of these com trol members, here Y, is movable sidewise axially and is normally urged toward the ot" member by a spring 2. Control member provided with a series of arcuate or segme: grooves 3 of taper formation, that is, one e Control n ber Y is provided with a continuous surfa Balls '5 are located in grooves 3 of memb and engage continuous surfacefi of memb in deep end t of the grooves, spring 2 will hm: members X Y close together but that, 1: the balls are in shallow end 5 of the groove the oamming action of said balls will force me bers X and Y apart against the tension of spr 2. The position of the balls. in the grooves controlled by the relative speed of co oi me bers X and l, and it be understood that, so o long as the speed of member X is greater th or equal to that of member Y", the balls wi: main in the deep end of the grooves but that, when the speed of member Y exceeds th member X, the balls will move toward the low end of the grooves and force membe A control element Z is pivt. 1y supported at 8 and is normally urged engagement with member 52' by spring 9 it will be understood that the sliding movem of Y eii'ects or permits a corresponding mo ment of control element 2, which movemenu be utilized to govern a clutch, a rheostat, pulleys and belts or what-not as fully explal in my said application Ser. No. 60,423 above ferred to.

As disclosed in my said application Ser. 60,423, the several devices or units can he s arately driven from a single prime mover any suitable means through speed change me anisms such as the well-known Reeves (1 which could then be under the control of cones elements Z. In the present disclosure the s eral units are not only separately driven are driven from independent motors. As seem in'Fig. 1, motor C drives folder A by means suitable transmission means indicated at It, and. motors D drive printing units B by means of suitable transmission means indicated at H, cylinders of each printing and perfecting couple being intergeared in the usual way. Folder A drives a shaft l2, extending along the different units, by suitable transmission means l3, and control member X of each control mechanism is driven from shaft I2 bysuitable transmission means ll. Control member Y of each control mechanism is driven from the printing and perfecting couple with which it is associated by suitable transmission means I5. All the motors are connected in parallel to leads L, and motor C can have its speed controlled by a suitable means such as rheostat R. The circuit of each of motors D is here controlled by a rheostat R of which control element Z forms the movable member. The desired relative speed is established by suitable gear ratios. In some printing machines the folder runs at say half the speed of the printing units, but in the present instance both the folder and the printing units run at the same speedfand the gear ratio, accordingly, is such that, when the folder and a printing unit run at equal speed, control members X and Y also run at equal speed. If it were desired to run the folder say at one-half the speed of the printing unit, the gear ratio. would be such that control members X and Y would run-at equal speed when the folder runs at half the speedof the printing unit.

It will now be understood that, when power is supplied to the machine, motors D will continue to accelerate so long as control member Y does not exceed the speed of control member X but that, so soon as it does, control element Z will cut in more resistance to thereby decelerate the speed of motor D, be remarked that the amplitude of movement of control element Z may be such that power to motor D is cut off altogether when the speed of control element Y exceeds that of control element X, thereby causing motor D to run due to its own momentum until it has decelerated sufliciently, after which power is again applied.

It may also be pointed out that the circuit of each motor D can be supplied with a manually operated controlling mechanism such as rheostat R2.

Considering now the system as a whole, it will be seen that Fig. 1 shows a plurality of separately driven devices or units greater than two and that the speed of a number of these devices or units, such as B, is individually and simultaneously controlled with respect to the speed of a single device or unit, such as A. It will further be seen that in carrying out the method of the above system there is employed a plurality of control mechanisms, such as O which are responsive to the-speed of a primary device, such as A, and individually and simultaneously responsive to the speed of the secondary devices, such as B, to individually govern the speed of devices B. In analyzing the system still more in detail, it will be seen that there is employed a plurality of control members, such as X and Y, which are arranged in pairs, the number of pairs being equal to the number of devices B, and that means are employed to drive one control member of each pair at a speed proportional to (not necessarily equal to) that of de-- vice A, together with means to drive the other control members of said pairs at speeds proportional to (not necessarily equal to) those of devices B; and that means, such as elements Z, which are responsive to variations in speed between the control members X and Y of, a pair, control the speed of that device B which drives the member Y of that pair.

It will also be seen that the system contemplates the use of a shaft, as I! which is driven from a unit, as A, and a plurality of control .5 mechanisms 0 for individually governing the andin this connection it may speed of units B, each of said units B being governed by a different control mechanism 0,

and that there are means to render all of the control mechanisms 0 responsive to the speed of shaft l2 and each control mechanism responsive to the speed of the unit B which it governs.

In the foregoing description it has been assumed that the direction of rotation of members X and Y is as indicated by the arrow in Fig. 3; that is, with shallow end 5 of slots 3 leading and deep end 4 trailing. It will, however, be understood that the direction of rotation could be the reverse of that indicated, in which event members X and Y would be separated so long as the speed of X exceeds or is equal to that of Y but that, when the speed of Y exceeds that of X, the two memlers would approach each other. In these circumstances, the effect of the movement of element Z should be correspondingly altered.

I claim;

l. The method of obtaining a desired speed relationship of a plurality of separately driven devices greater than two which consists in independently but simultaneously controlling the speed of a plurality of such devices with respect to the speed of a single device without aifectinfi the speed of the single device by the speed of the plurality of devices.

2. A system of speed control including: a pri-' mary device; a plurality of secondary devices driven separately from each other as well as separately from the primary device; and a plurality of control mechanisms responsive to the speed of the primary device and individually and simultaneously responsive to the speed of the secondary devices to independently govern the speed of the secondary devices but not that of the primary device.

3. A system of speed control including: a primary device; a plurality of secondary devices driven separately from each other as well as separately from the primary device; a plurality of control members arranged in pairs, the number of pairs being equal to the number of secondary devices; means to drive one control member of each pair at a speed proportional to that of the primary device; means to drive the other control memb ers of said pairs at speeds proportional to those of the secondary devices, each secondary device driving onecontrol member; and means responsive to variations in speed of the control members of a pair to control the speed of that secondary device which drives a member of that pair.

4. A system of speed control including: a plurality greater than two of separately driven units; a shaft; means to drive said shaft from one of said units; a plurality of control mechanisms for individually governing the speed of the remaining units, each of said remaining units being governed by a different control mech-l anism; means to render all of said control mechwith and governed by a diflerent control mechanism; means to render all of said control mechanisms responsive to the speed of the shaft; and means independent of said shaft to render each control mechanism responsive to the speed of the unitwith which it is associated and which it governs.

6. A system of speed control including: a plurality of printing units and a folding unit, separately driven; a shaft; means to drive said shaft from the folding unit; a plurality of control mechanisms for individually governing the speed of the printing units, each of said printing units being governed by a different control mechanism; means to render all of said control mechanisms responsive to the speed of the shaft; and means independent of said shaft to render each control mechanism responsive to the speed of the printing unit which is governs.

7. The combination with a plurality ,of separately driven. units, of a plurality of control mechanisms all of which are responsive to the speed of one of said units and each of which is only responsive to the speed of a. different unit of the remaining ones; and means to control the speed of said remaining units from said control mechanisms, each of said remaining units being governed by a different control mechanism from that which governs any of the other remaining units.

8. The combination with a plurality of separately driven units for printing and folding materlal, of a plurality of control mechanisms all of which are responsive to the speed of one of said units and each of which is only responsive to the speed of a different unit of the remaining ones; and means to control the speed of said remaining units from said control mechanisms,

each of said remaining units being governed 'by a different control mechanism from that which governs any of the other remaining units.

9. The combination with a plurality of printing units and a folding unit, separately driven, of a plurality of control mechanisms all of which are responsive to the speed of the folding unit and each of which is only responsive to the speed of a different printing unit; and means to control the speed of the printing units from said control mechanisms, each of said printing units being governed by a different control mechanism from that which governs any of the other printing units.

10. The combination with a plurality, greater than two, of separately driven units for printing and folding material, of means responsive to the speed of one unit for independently controlling the speed of the remaining units without affecting the speed of said one unit by the'speed of the remaining units.

11. The combination with a plurality, greater than two, of separately driven units for printing and folding material, of means responsive to the speed of one unit for simultaneously but independently controlling the speed of the remaining units without ail'ecting the speed of said one unit by the speed of the remaining units.

12. The combination with a plurality of printing units and a folding unit, separately driven, of means responsive to the speed of the folding unit for independently controlling the speed of the printing units without ail'ecting the speed of the folding unit.

13. The combination with a plurality of printing units and a folding unit, separately driven, of means responsive to the speed of the folding unit for simultaneously but independently controlling the speed of the printing units without affecting the speed of the folding unit.

14. The combination with a plurality of units for printing and folding material, of a motor for each unit, and means to control, by the speed of one motor, the speed of the remaining motors without controlling the speed of the one motor by the speed of the remaining motors.

15. The combination with a plurality of operating units greater than two, of a motor for each unit, and means to control, by the speed of the motor of one unit, the speed of the motors of the remaining units Without controlling the speed of the motor of the one unit by the speed of the motors of the remaining units.

16. A method of obtaining a desired speed relationship between a primary device and a plurality of secondary devices in which all of the aforesaid devices are separately driven and in which the secondary devices are unresponsive to the speed of one another but are independently and simultaneously responsive to the speed of the primary device, and in which the primary device is not responsiveto the speed of the secondary devices.

17. The method of obtaining a desired speed relationship of a plurality of separatelydriven devices greater than two which consists in independently but simultaneously controlling, with respect to the speed of one of said devices, the speed of the remaining devices, the speed of said one device being uncontrolled by the speed of said remaining devices.

18. A method of obtaining a desired speed relationship between a plurality of separately driven units greater than two in which-the speed of a plurality of subservient units is independently and simultaneously controlled by the speed of a master unit and in which the speed of the master unit is uncontrolled by-the speed of the subservient units.

a printing machine in which the speed of a plurality of subservient units is independently and simultaneously controlled by .the speed of a master unit and in which the speed of the master unit is uncontrolled by the speed of the subservient units.

20. A system of speed control including: a primary device; a plurality of secondary devices driven separately from each other as well as separately from the primary device; a plurality of control mechanisms, one associated with each secondary device, each control mechanism including two rotatable control members that rotate independently of each other at all times; means to drive one control member of each control mechanism proportional to the speed of the primary device; means to drive the other of said control members of each control mechanism pro-