US806463A - Pressure-controlling device for the air-springs of printing-presses. - Google Patents
Pressure-controlling device for the air-springs of printing-presses. Download PDFInfo
- Publication number
- US806463A US806463A US24827405A US1905248274A US806463A US 806463 A US806463 A US 806463A US 24827405 A US24827405 A US 24827405A US 1905248274 A US1905248274 A US 1905248274A US 806463 A US806463 A US 806463A
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- US
- United States
- Prior art keywords
- air
- bed
- piston
- cylinder
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/041—Wound springs with means for modifying the spring characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F3/00—Cylinder presses, i.e. presses essentially comprising at least one cylinder co-operating with at least one flat type-bed
- B41F3/46—Details
- B41F3/58—Driving, synchronising, or control gear
Definitions
- the bed designates the bed-plate; 11, the framing; 12, the reciprocating bed, and 13 the ways on which the bed runs.
- the bed is represented as driven by the mangle-shaft 14 15, gear 16, and rack 1.7 commonly used for driving the reciprocating beds of printings presses, the said rack being furnished, a-
- Attached to the bed 12 are the air-spring cylinders 22, provided at their inner ends with the inwardly-opening valves 23 and fitted with the pistons 24, the rods 25 of which are secured to the ends of the pressframing.
- These piston-rods are hollow for the greater portion-of their length and open at their inner ends through their pistons; but they are closed at their outer ends, near which their hollow interiors have communication, by
- the cams should be so constructed and arranged that their action will be so timed to the travel of the bed that the reduction of compression in the air-spring cylinders may commence at or near the point where the retardation of the speed of travel of the bed commences, they may be constructed and arranged to produce such reduction at any point in the travel of the bed, and this without regard to the means employed to produce the movement of the latter or to the character of said movement.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Description
PATENTED DBG.- 5, 1905.
C. P. GOTTRELL. PRESSURE CONTROLLING DEVICE FOR THE'AIR SPRINGS OF PRINTING I PRESSES. APPLICATION FILED MAR. 3, 1906- 2 sums-3111131 1.
i c cfiwl \w R\ v .I who 1 NQQOGZOOQEUQ S93025532323 m I v I .IRFKVN 1 8 I I h \nN No. 806.463. PATENTE'D-DEC. 5, 1905.
G. P. GOTTRELL. PRESSURE CONTROLLING DEVICE FOR THE AIR SPRINGS OP PRINTING PRESSES.
APPLIOATION FILED Mum. 190s.
2 SHEETS-SHEET 2.
UNITED STATES.
CHARLES P. OOTTRELL, OF WESTERLY, RHODE ISLAND. ASSIGNOR TO PATENT OFFICE.
C. B. GOTTRELL & SONS COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW JERSEY.
PRESSURE-CONTROLLING DEVICE'FOR THE AIR-SPRINGS OF P RINTING-PRESSES.
Specification of Letters Patent.
Patented Dec. 5, 1905.
Application filed March 3, 1905. Serial No. 248,274.
I requisite compression and resistance of the air in the said springs or cushions for counteracting or reducing the momentum of the bed during a portion of the travel of the latter and up to a certain predetermined point in such travel in either direction are obtained and maintained, but that beyond said point there shallv be no seriously-increased compression of the air and conse uent unnecessarily-increased resistance to t e bed s travel,
or, as may bedetermined upon, there shall be beyond that point a gradually-diminished resistance; yet if desirable there may be left in the spring at the still point or termination of the movement of the bed in either direction sufficient compression of the air to assist in starting the bed on its return; and the invention consists in means hereinafter described and claimed, consisting principally in an expansion-chamber with which the airspring cylinder is placed at proper times in and out of communication by the movement of the bed for so controlling the action of said air springs or cushions.
The invention is represented in the accompanying drawings, in which- Figure l'represents alongitudinal vertical section of as much of a reciprocating bed printing-press as is necessary for the explanation of the invention; Fig. 2, a section corresponding with a portion of Fig. 1, on a larger scale; Fig. 3, an end elevation corresponding with the right-hand end of Fig. 2; Fig. 4, a transverse vertical sectional view, taken on the line 44 of Fig. 2, of certain details to be hereinafter described.
10 designates the bed-plate; 11, the framing; 12, the reciprocating bed, and 13 the ways on which the bed runs. The bed is represented as driven by the mangle-shaft 14 15, gear 16, and rack 1.7 commonly used for driving the reciprocating beds of printings presses, the said rack being furnished, a-
usual, at each end with a stud 18 and a semi circular shoe 19, in the latter of which run the rollers 20 on the crank-pins 21 of the manglegear for directing said gear from the upper to the lower side of the rack, and vice versa.
Attached to the bed 12 are the air-spring cylinders 22, provided at their inner ends with the inwardly-opening valves 23 and fitted with the pistons 24, the rods 25 of which are secured to the ends of the pressframing. These piston-rods are hollow for the greater portion-of their length and open at their inner ends through their pistons; but they are closed at their outer ends, near which their hollow interiors have communication, by
means of short pipes 26, withwhat I term expansion-chambers 30, which constitute the principal element of the means for controlling the action of the air-springs which constitute the present invention. The said expansionchambers 30, one atveach end of the press, are
represented as each formed within a station.
The operation of the expansion-chamber to control the action of the air-springs is as follows: When in the movement of the pressbed in either direction one of its air-spring cylinders 22 begins to take in its piston 24, the piston 28 of the respective expansionchamber is near the top of its cylinder 27, as shown in Fig. 2, and the expansion-chamber has its smallest capacity. The piston remains in this position until the bed, the mangle-rack, and mangle-gear have arrived in the positions represented in Fig. 2, when the retardation of the movement of the bed is about to commence. Up to this point the necessary resistance to the movement of the bed and air-spring cylinder have been obtained and maintained, the compression of the air in the air-cylinder having been gradually increased with the corresponding increased resistance to the travel of the bed; but as the point 38 of the cam passes the roller 37 of the piston of the exp ansion-chamber the said piston is liberated and free to descend under the influence of the pressure in the air-spring cylinder, and thus increase the capacity of the expansion-chamber 30 to such extent that, air flowing freely thereinto from the air-cylinder, the pressure in the latter may be either reduced or only prevented from being in creased by the further movement of its piston with the bed. The degree of this reduction or prevention of increase of pressure will depend on the capacity of the expansionchamber provided for by the diameter of its cylinder and piston or by the movement permitted to the piston, and it may be so regulated as to leave as little pressure as desired in the air-spring cylinder, but preferably enough to assist in startin the bed on its return. This action takes place at each end of the press and with each expansion-chamber in turn, the piston of each of said chambers being raised to the position illustrated by Fig. 2 after the taking in of the respective air-spring piston into its cylinder and until the bed has passed that point in its travel where the retardation of its speed commences.
Although it may be preferable that the cams should be so constructed and arranged that their action will be so timed to the travel of the bed that the reduction of compression in the air-spring cylinders may commence at or near the point where the retardation of the speed of travel of the bed commences, they may be constructed and arranged to produce such reduction at any point in the travel of the bed, and this without regard to the means employed to produce the movement of the latter or to the character of said movement.
What I claim as my invention is 1. In a reciprocating-bed printing-press, the combination with the bed and the air spring cylinder and piston, of an expansionchamber of varying capacity which is brought into and out of communication with said cylinder by the movement of the bed.
2. In a reciprocating-bed printing-press, the combination with the air-spring cylinder and piston, of an expansion-chamber, and means actuated by the movement of the press for automatically varying the capacity of said chamber during the advance of the air-spring cylinder and piston the one relatively to the other.
3. In a reciprocating-bed printingpress, the combination with the air-spring cylinder and piston, of a second cylinder for communication with the air-spring cylinder, and. a cam-controlled piston in said second cylinder.
4. In a reciprocating-bed printing-press, the combination with the air-spring cylinder and piston, of a second cylinder for communication with the air-spring cylinder, a piston in said second cylinder actuated in one direction by the pressure of air from the airspring cylinder, and mechanism timed to the movement of the bed for actuating said piston in the opposite direction.
5. In a reciprocating-bed printing-press, the combination with the air-spring cylinder and piston, of a second cylinder and piston, the said cylinders having communication with each other provided by a passage through the air-spring piston.
6. In a reciprocating-bed printing-press, the combination with the air-spring cylinder and the piston therein having a hollow rod,
of a second cylinder and piston, and a communication between said second cylinder and the air-spring cylinder through said hollow rod.
7. In a reciprocating-bed printing-press, the combination of an air-spring cylinder attached to the bed, a stationary piston fitted to said cylinder, a second cylinder and piston and an air-passage through the first-mentioned piston to said second cylinder.
8. In a reciprocating-bed printing-press, the combination of an air-spring cylinder attached to the bed, a stationary piston fitted to said cylinder, a second cylinder for communication with the air spring cylinder through its piston, and a cam-controlled piston in said second cylinder.
9. The combination with a printing-press bed and mechanism for giving said bed a reciprocating movement retarded at a certain stage of its progress, of an air-spring cylinder and piston, an expansion-chamber for communication with said cylinder, and mechanism timed to the movement of the bed for controlling the capacity of said 'chamber during the retarded portion jofgsaid movement.
10. The combination with a printing-press bed and mechanism for giving said bed a reciprocating movement retarded at a certain stage of its progress, of an air-s ring cylinder and piston, a second cylinder or communi-c cation with the air-s ring cylinder, a piston in said second cylin er and a cam timed to the movement of the bed for controlling the action of the latter piston during the retarded portion of said movement.
In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 28th day of February, 1905.
CHARLES P. OOTTRELL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24827405A US806463A (en) | 1905-03-03 | 1905-03-03 | Pressure-controlling device for the air-springs of printing-presses. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24827405A US806463A (en) | 1905-03-03 | 1905-03-03 | Pressure-controlling device for the air-springs of printing-presses. |
Publications (1)
Publication Number | Publication Date |
---|---|
US806463A true US806463A (en) | 1905-12-05 |
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ID=2874946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US24827405A Expired - Lifetime US806463A (en) | 1905-03-03 | 1905-03-03 | Pressure-controlling device for the air-springs of printing-presses. |
Country Status (1)
Country | Link |
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US (1) | US806463A (en) |
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1905
- 1905-03-03 US US24827405A patent/US806463A/en not_active Expired - Lifetime
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