US700927A - Air-compressor. - Google Patents

Air-compressor. Download PDF

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US700927A
US700927A US7234901A US1901072349A US700927A US 700927 A US700927 A US 700927A US 7234901 A US7234901 A US 7234901A US 1901072349 A US1901072349 A US 1901072349A US 700927 A US700927 A US 700927A
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valve
cylinder
air
inlet
compressor
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US7234901A
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Ebenezer Hill
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Definitions

  • This invention relates to a compound compressor so devised that air may be drawn at two different pressures without material reduction of pressure in the interreservoir.
  • the object is to so arrange the valves and connections of a compressor that when air is drawn at low pressure from between the cylinders the second piston will automatically be rendered partly or wholly inoperative, thus leaving sufficient air between the cylinders to maintain the pressure.
  • This invention resides in a compound aircompressor having a passage connecting the interreservoir or other part of the duct between the cylinders and a specially-constructed inlet or discharge valve of the second cylinder, whereby on a reduction of pressure between the cylinders this special valve will be held open, so that the action of the second piston will be rendered ineffective and the volume of air which otherwise would be pumped forward by said piston will be re served to prevent a reduction of volume and a consequent fall of pressure, which would otherwise be incident to the low-pressure demand.
  • Figure 1 of the accompanying drawings shows an elevation of a part of a compound air-compressor with the first and second cylinders in section.
  • Fig. 2 shows a section of an ordinary inlet-valve.
  • Fig. 3 shows a section of an ordinary discharge-valve.
  • Fig. 4 shows a section of a special inlet-valve.
  • Fig. 5 shows a section of a special discharge-valve.
  • Fig. 6 is a diagram indicating the manner of using the special inlet-valve at each end to put the second cylinder entirely out of commission.
  • Fig. 7 is a diagram indicating the use of a special discharge-valve at each end to put the second cylinder entirely out of commission.
  • Fig. 1 shows an elevation of a part of a compound air-compressor with the first and second cylinders in section.
  • Fig. 2 shows a section of an ordinary inlet-valve.
  • Fig. 3 shows a section of an ordinary discharge-valve.
  • FIG. 8 is a diagram indicating the use of a special inlet-valve at one end and a special discharge-valve at the other end for putting the second cylinderoutof commission.
  • Fig. 9 is a diagram indicating the use of a special inlet-valve and a special dischargevalve at the ends of the second cylinder opposite to the arrangement represented by Fig. 8.
  • Fig. 10 is a diagram indicating the use of a special inlet-valve at one end for putting one half of the cylinder out of commission.
  • Fig. 11 is a diagram indicating the use of a special inlet valve for putting the other half of the second cylinder out of commission.
  • Fig. 12 is a diagram indicating the use of a special discharge-valve at one end for putting that end of the cylinder out of commission.
  • Fig. 13 is a diagram indicating the use of a.
  • Fig. 14 is a view showing a modified means for operating a discharge valve when the pressure in the cylinder-interduct is reduced.
  • the piston 1 in the double-acting first cylinder 2 of the compressor illustrated is connected with the piston 3 in the double-acting cylinder 4 by a rod 5, which is adapted to be connected with steam-pistons inthe usual manner.
  • the first and second cylinders are connected by an ordinary interreservoir 6, which may be any desired shape and diameter and which, with the openings to the valveports, forms the interduct.
  • the first cylinder ateach end has a common inlet-valve 7 and a common discharge-valve 8.
  • the second cylinder is shown with a common inlet-valve 9 at one end and a common discharge-valve 10 at the other end. If the inlet-valve at one end of the second cylinder is held open, that end of the cylinder will be inoperative.
  • one of the above special inlet-valves could be usedat each end, as indicated by Fig. 6, or one of the above-described discharge-valves could be used at each end, as indicated by Fig. 7, or a special inlet-valve could be used at one end and a special discharge-valve could be used at the other end of the second cylinder, as indicated by Figs. 8 and 9. If it is desired to put only one half of the second cylinder out of commission, one special inlet or one special discharge valve can be used at either end, as indicated by Figs. 10, ll, 12, and 13.
  • a compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder-interduct, means for opening a valve of the second cylinder, and a passage so connecting said interduct with the valveopening means that the pressure in the cylinder-interduct controls the operation of the valve-opening means, substantially as specified.
  • a compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder-interduct,means tending to open an inlet-valve of the second cylinder, a passage-so connecting said interduct with the chamber of said inlet-valve that the normal pressure in the cylinder-interduct is exerted oppositely to and holds in check the means tending to open said inlet-valve, substantially as specified.
  • valve-piston In a compound air-compressor having cylinders,'pistons, inlet and discharge valves and cylinder-interduct, a valve-piston, means for moving the valve-piston so it will open a valve of the second cylinder, and a passage so connecting said interduct with the valvepiston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and holds the means for moving the valvepiston, substantially as specified.
  • a compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder interduct, a valve-piston, a spring for moving the valve-piston so it will open a valve of the second cylinder, and a passage so connecting said interduct with the valve-piston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and holds the means for moving the valve-piston, substantially as specified.
  • a compound air-compressor having cylinders, pistons, inlet and discharge. valves and cylinderinterduct, a valve-piston, a spring for moving the valve-piston into contact with a portion of a valve of the second cylinder, and a passage so connecting said interduct with the valve-piston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and overcomes the spring, substantially as specified.

Description

No. 700,927. 'Patented May' 27, I902.
E. HILL.
AIR COMPRESSOR (Application filed Aug. 17, 1901.) (No Model.) 4 Sheets-Sheet 1!.
(No Model.)
PatentedMay 27, I902. E HILL.
AIR OQMPRESSOB.
(Applieatim med Aug. 17, 1901.)
4 ShaetsS heet 2,
No. 700,927. Patented May 27, I902.
E. HILL.
AIR COMPRESSOR.
(Application filed Aug. 17, 1901.)
4 Sheets-Sheet 3.
ZWMM.
No. 700,927. Patented May 27,1902.
-E. HILL.
AIR COMPRESSOR. (Application filed Aug. 17, 1901.)-
(NB Modem 4 Sheets-Sheet 4,
UNTTEE STATES PATENT OFFICE.
EBENEZER HILL, OF SOUTH NORWALK, CONNECTICUT.
AIR-COMPRESSOR.
SPECIFICATION forming part of Letters Patent No. 700,927, dated May 27, 1902.
Application filed August 17, 1901. Serial No. 72,349. (No model.)
To (tZZ whom it may concern:
Be it known that I, EBENEZER HILL, a citizen of the United States, residing at South Norwalk, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in AinCompressors, of which the following is a specification.
It is frequently necessary in factories to use compressed airattwo differentpressures for example, it may be desired to draw air at twenty pounds for cleaning castings and at the same time draw air at ninety pounds for running hoists and tools. Under ordinary conditions drawing air from between the cylinders of a compound compressor reduces the volume of air to such an extent that the interpressure will not be maintained.
This invention relates to a compound compressor so devised that air may be drawn at two different pressures without material reduction of pressure in the interreservoir.
The object is to so arrange the valves and connections of a compressor that when air is drawn at low pressure from between the cylinders the second piston will automatically be rendered partly or wholly inoperative, thus leaving sufficient air between the cylinders to maintain the pressure.
This invention resides in a compound aircompressor having a passage connecting the interreservoir or other part of the duct between the cylinders and a specially-constructed inlet or discharge valve of the second cylinder, whereby on a reduction of pressure between the cylinders this special valve will be held open, so that the action of the second piston will be rendered ineffective and the volume of air which otherwise would be pumped forward by said piston will be re served to prevent a reduction of volume and a consequent fall of pressure, which would otherwise be incident to the low-pressure demand.
Figure 1 of the accompanying drawings shows an elevation of a part of a compound air-compressor with the first and second cylinders in section. Fig. 2 shows a section of an ordinary inlet-valve. Fig. 3 shows a section of an ordinary discharge-valve. Fig. 4 shows a section of a special inlet-valve. Fig. 5 shows a section of a special discharge-valve. Fig. 6 is a diagram indicating the manner of using the special inlet-valve at each end to put the second cylinder entirely out of commission. Fig. 7 is a diagram indicating the use of a special discharge-valve at each end to put the second cylinder entirely out of commission. Fig. 8 is a diagram indicating the use of a special inlet-valve at one end and a special discharge-valve at the other end for putting the second cylinderoutof commission. Fig. 9 is a diagram indicating the use of a special inlet-valve and a special dischargevalve at the ends of the second cylinder opposite to the arrangement represented by Fig. 8. Fig. 10 is a diagram indicating the use of a special inlet-valve at one end for putting one half of the cylinder out of commission. Fig. 11 is a diagram indicating the use of a special inlet valve for putting the other half of the second cylinder out of commission. Fig. 12 is a diagram indicating the use of a special discharge-valve at one end for putting that end of the cylinder out of commission.
Fig. 13 is a diagram indicating the use of a.
special discharge valve for putting the opposite half of the cylinder out of commission, and Fig. 14 is a view showing a modified means for operating a discharge valve when the pressure in the cylinder-interduct is reduced.
, The piston 1 in the double-acting first cylinder 2 of the compressor illustrated is connected with the piston 3 in the double-acting cylinder 4 by a rod 5, which is adapted to be connected with steam-pistons inthe usual manner. The first and second cylinders are connected by an ordinary interreservoir 6, which may be any desired shape and diameter and which, with the openings to the valveports, forms the interduct. The first cylinder ateach end has a common inlet-valve 7 and a common discharge-valve 8. The second cylinder is shown with a common inlet-valve 9 at one end and a common discharge-valve 10 at the other end. If the inlet-valve at one end of the second cylinder is held open, that end of the cylinder will be inoperative. Holding the discharge-valve at one end of the second putting an end of the cylinder out of commission is the pressure of air. It is possible to employ gravity, as by means of a weight 44: and lever 45, instead of a spring or air-pressure for this auxiliary force, as represented by dotted outline in Fig. 14. These valves act automatically, and when one is held open the amount of air that would have passed through it and not return is reserved to supply the place of that which is drawn 0E from the interduct.
If it is desired to render the second cylinder entirely inoperative, one of the above special inlet-valves could be usedat each end, as indicated by Fig. 6, or one of the above-described discharge-valves could be used at each end, as indicated by Fig. 7, or a special inlet-valve could be used at one end and a special discharge-valve could be used at the other end of the second cylinder, as indicated by Figs. 8 and 9. If it is desired to put only one half of the second cylinder out of commission, one special inlet or one special discharge valve can be used at either end, as indicated by Figs. 10, ll, 12, and 13.
By means of the simple mechanism described it is possible to furnish air at high and low pressures with a single compressor so as to meet the ordinary demands of a factory.
I claim as my invention- 1. A compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder-interduct, means for opening a valve of the second cylinder, and a passage so connecting said interduct with the valveopening means that the pressure in the cylinder-interduct controls the operation of the valve-opening means, substantially as specified.
2. A compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder-interduct,means tending to open an inlet-valve of the second cylinder, a passage-so connecting said interduct with the chamber of said inlet-valve that the normal pressure in the cylinder-interduct is exerted oppositely to and holds in check the means tending to open said inlet-valve, substantially as specified.
3. In a compound air-compressor having cylinders,'pistons, inlet and discharge valves and cylinder-interduct, a valve-piston, means for moving the valve-piston so it will open a valve of the second cylinder, and a passage so connecting said interduct with the valvepiston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and holds the means for moving the valvepiston, substantially as specified.
4. A compound air-compressor having cylinders, pistons, inlet and discharge valves and cylinder interduct, a valve-piston, a spring for moving the valve-piston so it will open a valve of the second cylinder, and a passage so connecting said interduct with the valve-piston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and holds the means for moving the valve-piston, substantially as specified.
5. A compound air-compressor having cylinders, pistons, inlet and discharge. valves and cylinderinterduct, a valve-piston, a spring for moving the valve-piston into contact with a portion of a valve of the second cylinder, and a passage so connecting said interduct with the valve-piston chamber that the normal pressure in the cylinder-interduct is exerted oppositely to and overcomes the spring, substantially as specified.
EBENEZER HILL.
Witnesses:
E. HILL, J r., J. E. SLATER.
US7234901A 1901-08-17 1901-08-17 Air-compressor. Expired - Lifetime US700927A (en)

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