US1054211A

US1054211A - Air-compressor.

Info

Publication number: US1054211A
Application number: US64837611A
Authority: US
Inventors: Justus R Kinney
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-09-08
Filing date: 1911-09-08
Publication date: 1913-02-25
Anticipated expiration: 1930-02-25

Description

J. R. KINNEY.

AIR COMPRESSOR.

APPLICATION rum) SEPT. a, 1911.

1,054,21 1. Patented Feb. 25, 1913.

2 SHEETS-SHEET 1.

Wtnesses: liwentor: M Jusfilfilnnqy,

0% I 51m MM,

JUSTUS R. KINNEY, OF DORCHESTER. MASSACHUSETTS.

AIR-CGMPRESSOR.

Specification of Letters Patent.

Patented Feb. 25, 1913.

Application filed September 8. 1911. Serial No. 648,376.

To all whom it may concern Be it known that I, JFSTUS R. Kixxrv, a citizen of the United States of America, and a resident of Dorchester, in the county. of Suffolk and State of Massachusetts, have invented certain ne'. and useful Improvements in Air-Compressors, of which the following is a specification.

This invention relates to air compressors and particularly to devices of this class in which a rotary piston is mounted in a cylindrical piston chamber, and is provided with a radial blade adapted to reciprocate in an oscillating member provided for the purpose of controlling the discharge.

The invention consists primarily in providing said oscillating member with one or more discharge ports communicating at the inner end with a passage in said radial blade and communicating at the other end temporarily with discharge outlets in the compressor casing or a bushing mounted therein.

The invention t'mrther consists in so constructing and positioning the port or ports in said oscillating member that they will be out of register with the discharge outlets during the first half of the cycle of said rotary piston, and will register with said ports during a portion of the last half of the cycle of said piston.

The invention further consists in certain novel features of constructimi and arrangement of parts which will be readily understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a transverse section of an air compressor cmbodying the features of the present invention, the cutting plane being on line 1-1 on Fig.'2, and Fig. 2 represents a longitudinal vertical section of the same, the cutting plane being on line 22 on Fig. 1.

Similar characters designate like parts throughout the drawings.

In the drawings, 10 represents a casing member provided with a cylindrical piston chamber 11, an inlet compartment 12, and an outlet compartment 13. The inlet compartment 12 communicates with the piston chamber 11 by means of the passage 14 Interposed between the inlet compartment and the outlet compartment 13 is a cylindrical bushing 15 provided with discharge outlets 1t; and 17, registering with the passages 18 and 19 in thewall 20 of said casing,

these passages 18 and 1t) communicating with the outlet compartment 13 from which extends the discharge pipe 21. The bushing 1.") is fixedly secured in the casing 10 by the set screw 15* and has mounted therein a cylindrical member 22 having a central longitudinal slot 23 therein, in which is positioned a radial blade 21 formed upon or secured to the annular piston member 25 mounted upon an eccentric 26 keyed to a shaft 27 revoluble in bearings 28 extending outwardly from the end plates 29 forming the end walls of said piston chamber 11. The bushing 15 extends into recesses formed in the inner faces of these end walls 25, as indicated at 230 in Fig. 2 of the drawings, the central portions of said bushing being supported by the central partition 31. Prcfe 'ably two piston chaml'iers 11 are used in each compressor, one on either side of the central partition 211,11 indicated in Fig. 2, and in caTr'h' iiston chamber is mounted an annular piston 25, these pistons being oppositely disposed as indicated in saul ligure. In the bushing 15 are mounted preferably two oscillating members 22, placed end for end, and extending into the recesses in the inner faces of the end plates 29, these members 22 being adapted to oscillate independently of one another. Jach blade 24 is provided with a passage in one face thereof, this passage communicating at all times with the ports 33 and 3-1, extending substantially radially from the slot 23 to the periphery of the oscillating members 22. The inner end of the passage 32 is somewhat removed from the periphery of the member 25 and as a consequence the discharge through this passage is entirely out off during a portion of the cycle of the piston.

Air is admitted to the compressor through the inlet between which and the inlet compartment 12 is interposed a valve 36 adapted to be held to its seat by the pressure within the compressor when the said compressor is not in operation. \Vhen it is desired to operate the compressor the piston is revolved in the direction of the arrow a on Fig. 1 of the drawings, and the suction caused by the rotation of said piston will cause the valve 36 to open and permit the admission of air through the inlet 35 into the inlet compartment 12 and thus into tiles and is only closed when the piston thereof is at rest. From an inspection of Fig. 1 of the drawings, it is obvious that during the first half of the cycle of said piston25 the outlets 16 and 17 in the bushing 15 will be out of register with the

ports

33 and 34 formed in the oscillating members 22. By this means the air in advance of the piston 25 will be compressed in the chamber 11 inasmuch as it has no opportunity to escape therefrom. As soon, however, as the piston passes a central point, that is the position indicated in Fig. 1 of the drawings,..the movement of the blade 24 will cause the oscillation of the member 22, thereby bringing the

ports

33 and 34 into register with the discharge openings 16 and 17 thus permitting the air which has been compressed in the piston chamber 11 to pass "therefrom through the passage 32,

ports

33 and 34, out-' lets 16 and 17, into the outlet compartment 13. By the time the piston 25 reaches its uppermost central position that is, a position directl opposed to that indicated in Fig. 1 of the drawings, it is quite obvious that the ports 33' and-34 will againbe out of register with the discharge openings 16 and 17 on account ofthe oscillation of the member 22, and these ports and discharge openings will remain out ofrdgister until the piston again reaches the position shown in Fig. 1 of the drawings. It is self-evident that by shutting off the discharge in the man.- ner indicated during the first half of the cycle of the piston, an increased compression is secured in the piston chamber, and the'efiectiveness of the compressor is consequently greatly increased. Moreover, it is obvious that owing to the fact that all communication is shut off between the outlet chamber 13 and the piston chamber 11 during the first half of the cycle of the piston 25, there can be no back. pressure on said piston and during this portion of its movement the piston 25 will operate against atmospheric pressure only. This forms an important feature of the present invent on.

By loosening the set screw 15* and turning the bushing 15 about its axis the ports 16 and; 17 therein may be sopositioned relative to" the passages and 34 inthe oscillating members 22 that compression may commence at varying points in the last half of the cycle of the piston 25, thereby securing varying degrees of compression. This is desirable as by this adjustment-"of the valve mechanism the device maybe made to compress the air within the piston chamber to just the degree desired in the storage tank with which the pipe 21 is intended to communicate. When it has been determined what pressure is desired in said tank the bushing 15 is so set as to secure that degree of compression.

It is believed that the operation and many advantages of the invention will be fully understood from the foregoing.

Having thus described my invention, claim: 1. In a device of the class described, the combination with a casing having a cylindrical piston chamber, an inlet passage in direct communication therewith, a check valve in, said inlet passage, and an outlet compartment; a. rotary piston in said chamber; and valve mechanism interposed between said outlet compartment and piston chamber and adapted to be automatically closed during the first half of the cycle of said piston and opened during a portion of the last half of the cycle of said plston.

2. In a device of the class described, the combination with a casing having a cylindrical piston chamber, an inlet passage in direct communication therewith, a check valve in said inlet passage, and anoutletcompartment; a rotary piston in said chamher; and valve mechanism interposed between said outlet compartment and piston chamber operable by the rotation'of said piston and closed thereby during the first half of its cycle, and opened during a portion of the last half of the cycle of said piston.

'3. In a device of the class described, the

combination with a'casing having a cylindrical piston chamber, an inlet passage in direct communication therewith, a check valve in said inlet passage, and an outlet compartment; a rotary piston in said chamher; a radial blade rigidly secured to said piston having a passage therein; and an oscillating member having a slot within which said blade is adapted to reciprocate, and-L provided with a radial port communicating constantly at one end with said blade pas sage and adapted to communicate at the other end during the oscillation of said member with a passage to said outlet comnormally fixedly secured -in position surrounding said oscillating member and having an opening therethrough to said outlet compartment adapted to register with said radial port during a portion of the movement of said oscillating member.

5. In a device of the class described, the

combination with a casing having a cylindrical piston chamber, an inlet passage in direct commpnication therewith; a check valve in said inlet passage, and an outletcompartment; a rotary piston in said chamber; a radial blade rigidly secured to said piston having a passage therein; a cylindrical oscillating member having a slot within which said blade is adapted to reciprocate and provided with a radial port communicating with said blade passage; and a bushing normally fixedly secured in posi- 'tion surrounding said oscillating member movement 0 and having an openin therethrough to said outlet compartment a apted to register with said radial ort during a portion of the t said oscillating member.

6. In a device of the class described, the

, combination with a casing having a cylinin which said blade is adapted to reciprocate and provided with radial ports from said slot to its outer periphery; and a bushing normally fixedly securedin position surrounding said oscillating member having openings therethrough to said outlet compartment adapted to temporarily register with said radial ports.

7. In a device of the class described, the combination with a" casing having a cylindrical piston chamber, an inlet passage in direct communication therewith; a check valve in said inlet passage, and an.outlet compartment; a rotar piston in said chamber; a radial blade rigidly secured to said piston having a passage therein; a cylindrical oscillating member havin a slot within which said blade is adapte to reciprd cate and providing with radial ports from said slot to its outer periphery; and a bushing normally fixedly secured in position surrounding said oscillating member having openings therethrough to said outlet compartment adapted to register with said radial ports during the last half of the cycle of said piston.

8. In a device of the class described, the combination with a casing having a cylindrical piston chamber, an inlet passage in direct communication therewith, a check valve in said inlet passage, and an outlet compartment; a rotary piston in said chamber; a radial blade rigidly secured to said piston having a passage therein; a cylindrical oscillating member having a slot within which said blade is adapted to reciprocate and provided with radial ports from said slot to its outer periphery; and a bushing normally fixedly secured in position surrounding said oscillating member having openings therethrough to said outlet compartment adapted to register with said radial ports during the last half of the cycle of said piston and to be closed by said oscillatin member during the first half of the cycle 0 said piston.

9. In a device of the class described, the combination with casing having a cylindrical piston chamber, an inlet passage in direct communication therewith, a check valve in said inlet passage, and an outlet compartment; a rotary piston in said chamber; an

oscillating valve in said outlet passage provided with a diametrical slot therethrough and outlet ports communicating with said slot; a radial blade rigidly secured to said piston extending through said slot and adapted, to oscillate said valve during the rotation of said piston; and a bushing normally fixedly secured in position inclosing said valve having discharge openings therein adapted to register with the valve ports during the last part of the cycle of said piston.

10. In device of the class described, the combination with a casing having a cylindrical piston chamber, an inlet passagecom:

municating therewith and an outlet compartment; a rotar piston in said chamber; 1 a radial blade rigldly secured to said piston having a passage therein; an oscillating member havin a slot within which sai blade is adapte to reciprocate, and provided with a radial port communicating with said blade passage; a bushing surrounding said oscillating member and having an opening therethrough to said outlet compartment adapted to register with said radial port during a portion of the movement of said oscillating member; and means for fixedly securing said bushing in adjusted positions relative to said casing.

11. In a device of the class described, the combination with a casing having a cylindrical piston chamber, an inlet passage in direct communication therewith and an outlet compartment; a check valve in said inlet passage; a rotary piston in said chamber; a radial blade rigidly secured to said piston having a passage therein; an oscillating member having a slot within which said blade is adapted to reciprocate, and provided with a radial port communicating with said blade passage; a bushing surrounding said oscillating member and having an opening therethrough to said outlet compartment adapted to register with said radial port during a portion of the move ment of said oscillating member; and a set screw for fixedly securing said bushing in adjusted positions relative to said casing.

12. In a device of the class described, the combination with a casin having a cylindrical piston chamber, an lnlet passage communicating therewith normally closed by a check valve, and an outlet compartment, a

rotary piston in said chamber; and valve mechanism interposed between said outlet compartment and piston chamber operable by the rotation of said piston and closed thereby during the first half of its cycle and open during a portion of the last half of the cycle of said piston.

13. In a device of the class described, the combination With a casing having a cyindrical piston chamber; an inlet passage in direct communication therewith; a check valve in said inlet passage, and an out-let compartment; a rotary piston in said chamher; a radial blade rigidly secured to said piston having a passage therein the inner end of which is somewhat removed from the periphery of said piston; and an oscil- 'lating member having a slot Within which