US1729548A

US1729548A - Air compressor

Info

Publication number: US1729548A
Application number: US263512A
Authority: US
Inventors: Peter F Price
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-03-21
Filing date: 1928-03-21
Publication date: 1929-09-24
Anticipated expiration: 1946-09-24

Description

Sept. 24, 1929. P. F. PRICE AIR COMPRESSOR 4 Sheets-Sheet 1 Filed March 21, 1928 ATTORNEY Filed March 21, 1928 4 Sheets-Sheet 2 P. F. PRICE AIR COMPRESSOR -Filed March 21, 1928 4 Sheets-Sheet INVENTOR ATTOR NEY Sept. 24, 1929.

Sept. 24, 1929. P. F. PRICE I AIR COMPRESSOR Filed March 21. 1928 4 Sheets-Shee 4 Fj rd? INVENTOR ATTORNEY Patented Sept. 24, 19 29 UNITED STATES PETER F. PRICE, .OF BENTLEY, MICHIGAN AIR COMPRESSOR Application filed March 21, 1928. Serial No. 263,512.

This invention relates to an air compressor, the general object of the invention being to provide a compressor of small size so that it can be readily held in the hands and used for inflating tires and for other purposes.

Another object of the invention is to provide an electric motor and a compressor, with means for driving the same from the motor, with a casing enclosing the parts.

Another object of the invention is to form the compressor of a rotary cylinder carrying member having a piston in each cylinder, with a stationary eccentric having an annular groove. therein to receive portions of the piston rods to cause the reciprocatory movement of the pistons as the cylinder carrying member revolves around the eccentric.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention; in detail, reference will be had to the accompanying drawings wherein like characters denotelike or corresponding parts throughout the several views, and in which parts broken away.

Figure 2 is a view of the nozzle end of the device.

Figure 3 is a section on line 33 of Figure 1.

Figure 4 is a longitudinal sectional view through the device.

Figure 5 is a section on line 55 of F igure 4.

Figure 6 is a section on line 66 of Fig ure 4. v

Figure 7 is a section on line 77 of Figure 4. I

Figure 8 is a section on line 88 of Figure 5.

Figure 9 is a section on line 9-9 of Figure 6. Y

Figure 10 is a section on line 1010 of Figure 1. Figure 11 is a section on line 11-11 of Figure 3. v 4

Figure 12 is a view in elevation of the center plate 37 In these views, the numeral 1 indicates a caslng which is so shaped that it can be readily held in the hands and this casing has one end closed and a cap 2 closes the other end, the cap being fastened to the casing by the screws 3. The cap is provided with the holes 4 and the casing with the holes 5 so that an can pass into the casing and some of these holes act to permit access to the parts for adjustment and oiling purposes. A nozzle member 6 is fastened to the cap and has a chamber 7 and a passage 8 therein, the passage 8 connecting the chamber with the nozzle outlet 9 in which is placed the gasket 10 and the pin 11, the pin acting to unseat valves of tires so that air can pass from the device into the tire. A gasket 12 is placed in the nozzle member and the cap td, prevent leakage from the chamber 7.

A partition plate 13 has its flange connected with portions of the inner wall of the casing, intermediate the ends of the-easing by the screws 14 and plates 15 fastened to the walls of the casing and engaging slots in the flange of the partition plate, prevent rotary movement of the partition plate.

A pair of U-shaped members 16 is arranged in the rear part of the casing and the limbs of each member are connected with the partition plate. The members are arranged at right angles to each other and their hights are connected together at their centers. Holes are formed in these bights and in the partition plate to receive the bushings 17 which form bearings for the pintles 18 of the rotor 19 of the electric motor, the field carrying ring 20 of which is fastened to the limbs of the members 16. Brackets 21, fastened to the sides of the casing and engaging the limbs of the members 16, act to brace said members. Supports 22 on the bights of the members 16 carry the brushes 23 for the rotor.

The conductors 24 enter the rear part of the casing from the conduit 25 and these conductors are connected with the contacts 26 on the block 27 of insulating material and the conductors 28 leading to the brushes are connected with the contacts 29 on the block,

- openin one of these contacts 29 being arranged under and spaced from a contact 26 and the two pairs of contacts are adapted to be bridged to close the circuit by the pair of contacts 30 carried by the switch arm 31 which is pivoted to the rear end of the casing and has a knob 32 at one end thereof passing through a slot 33 in the rear end of the casing so that the arm can be moved by hand to open and close the switch. A spring 34 guides the arm and holds it in adjusted-position.

The compressor, shown generally at A, is arranged in the front part of the casing between the partition plate and the cap and said compressor comprises a ring member 35 having the cylinders 36 formed therein and the

center plates

37 and 38 which have their peripheries fastened to the ring member. The compressor is rotatably supported on a stationary shaft 39 fastened at its rear end to a bracket 40 which is secured to the partition plate and this shaft engages bearing formed in the

plates

37 and 38. An eccentrlc 41 is keyed to the shaft and is located in the space formed by the

plates

37 and 38. This eccentric is formed with an annular groove 42 which is engaged by the T- shaped heads of-the piston rods 43 which are pivoted by the threaded pins 44 in the extensions 45 of the pistons 46. The extensions 45 of the pistons are each of considerable width with their inner portions forming guides which engage guideways 47 formed on the inner faces of the

plates

37 and 38.

A cup washer 48 is connected with each piston 46 in such a manner that air can pass the washer on the suction stroke of each piston, but the washer will be expanded bythe air in the cylinder on the compression stroke so that air cannot escape past the washer.

The air entering the casing through the holes therein will pass to the cylinders through v the holes 49 in the plate 37 onthe suction strokes of the pistons. The compressed air will pass through the diagonally arranged ports 50 in the front wallsof thecylinders when the pressure in each cylinder is great enough to unseat the valve 51 of cup shape and which covers the outer end of each port. Each cup-shaped valve is carried by a spring arm 52 which is connected to a bracket 53' fastened to the front face of the ring member 35, a coils ring 54 arranged between the arm and the bracket, tending to hold the valve 51 on its seat. The air passing through the ports 50 enters a chamber formed by a covering member 55 fastened to the ring member and from this chamber, the .air passes through a tube 56 into the chamber 7 ofthe nozzle member so that it can pass through the passage 8 to the nozzle part 9. The tube 56 rotates with the compressor and it passes through a acking gland 57 carried by the inner part 0 the cap and the 'nut 58 of which can be adjusted through the openings 4 in the ca A gear 59 is keyed to the front pintle 18 of the rotor 19 and meshes with a large gear 60 on a stub shaft 61 carried by the partition plate and a small gear 62 is fastened tothe gear 60 and meshes with a ring gear 63 fastened to the rear part of the ring member 35. Thus the compressor is rotated from the motor by these gears.

I prefer to make the eccentric 42 of two halves bolted together as shown, and the ends of the cylinders are covered by the plates 64.

From the foregoing it will be seen that I have provided a simple form of compressor, the motor and compressor parts of which are enclosed in a single casing. When the motor is in operation, the compressor will be rotated on the stationary shaft 39 through tons thereof will be reciprocated, as their rods 43 pass around the eccentric groove in the eccentric 41. Thus air will be drawn into the cylinders of the compressor on the suction strokes of the pistons and this air will be forced through the ports 50 on the compression strokes, the compressed air entering the chamber formed by the covering member 55 and passing through the tube 56 into the nozzle member.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent. It is to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is A device of the class described comprising a casing, a partition 1plate therein dividing the casing into'two c ambers, a pair of U- shaped members in one chamber, one member bein arranged at right angles to the other an the ends of the limbs of the members being connected with the partition plate,

bearings carried by the bi hts of said mem-' bers and by the partition p ate, a motor havm its rotor jeurnaled in said bearings, a

fie d carrying ring connected with the for controlling linders, rods connected having enlarged inner 1 of the U-sha ed members, brushes sup orted: aped members, a circuit or the.

ends engaging the groove in the eccentric, each piston aving .a cup-shaped washer thereon for permitting air to enter the cy1- inder on the suction stroke and to be compressed in the cylinder on the compression stroke, each cylinder having a discharge port, a spring pressed valve controlling each port, a chamber forming member connected with the compressor and enc10sing,-the' alves and ports, a tube connected with said member and extending to one end of the casing, packing means for the tube, a nozzle member connected with said end of the casing and receiving the air from the tube and gearing connecting the motor with the compressor.

PETER F. PRICE.