Abstract of
GB156332
156,332. Olson, C. J. Oct. 7, 1919. Automatic gear. - An automatic valve for motors, portable drills, &c. is operated by back pressure of power fluid to regulate pressure according to load. The valve casing consists of a cylinder 30 with ports at each end, those at the engine end being regulated by a piston valve 40 closed at one end and having a toothed rim at its other end coacting with a similar rim on a fixed sleeve 47. The pressure on the valve is regulated by a worm-wheel adjustment and spring 46. A plug cock 50. controls the access of power fluid to the valve which is always slightly open at the ports 37.
3. The governing valve as in Claim 2 characterized by the adjustable sprint controlling the said piston.
4. The governing valve as in Claims 2 and 3 characterized by the regulatingscrew and worm pinion device for adjusting the said spring.
5. The herein described automatic regulating valve adapted to regulate the supply in proportion to the pressure in the delivery line and characterized by thecylinder having ports therein and cup shaped piston adapted to partiallv close said ports, and characterized further bv the notched sleeve against which the piston is spring pressed.
Description
COMPLETE SPECIFICATION
Automatic Regulating Valve.
I,CHAIZLES JOFIN OLSON 0 57 F1t17
Street,Muskegon, Michigan, United
States of America, Engineer, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statmentis-
Thisinvention-relates-toan automatic re (rlllating valve adapted for application to pressure fluid operated engines such a, s air or steam engines, and particularly those used in connectionwith-portable power drills and provides an improved form of valve of the kind which regulatesthe now of pressure nuid in proportion to the load on the motor as indicated by the pressure in the supply pipe to the motor.
The invention and its objects and advantages will be properly understood from a consideration of the following description taken in connection with the accompanying drawings which show a. practical embodiment of the invention designed for use in connection with portable power drills.
Figure1 is an axial sectional view of the valve.
Figure 2 is a transverse section on the line4-4 of Fig.1.
Figure 3 is an outside elevation of the valve ona smaller scale.
The improved valve shown, which is intended for controlling the supply of air to the motor of a portable power drill and at the same time to constitute a handle for the said drill, comprises atúbe lor eylinder 30 having exteriorly screw threaded ends31 and32, the end 32 being screwed into a suitable boss on the motor casing of the power drill.
A cylindrical casing 33 is fitted over the cylinder 30 and has inwardly flanged ends 34 and 35 which screw upon the ends 31 and32, the cylinder 30 being of greater length than the casing and prjecting beyond the latter at each end.
Ports 36 and 37 are formed inthe-wall of cylinder 30 toward opposite ends thereof and open into the interior of casing 33, a portion38 extending across the cylinder near the ports 36 andclosing-the passage through the. cylinder.
Acup-shaped piston 40 is located in the cylinder, the open end of this piston facing away from the partition 38.
Swiveled in this partition is a screw 41 having fixed thereon a worm gear42 engaged by a worm pinion 43 operable by a handle 44 projecting exteriorly of the casing 33. A movable head 45 is threaded upon the screw and a coiled spring 46 beam between this head and the solid end of the piston 40. The opposite end of the piston bears against the notched end of a sleeve 47 the position of which may be regulated by a ring 48 screwed into the end of the cylinder, the notched end of the sleeve projecting slightly across the ports37 so as to maintain the latter at all times partially open.
To regulate the supply of air or other pressure fluid to the valve I have provided a plug valve 50 in a casing 51 which screws on the end 31 of cylinder 30, the valve 50 having a toothed flange52 mesing witha toothed barrel 53 rotatably supported on the valve casing.
In operation the valve is connected to the supply line, the power fluid entering one end of cylinder 30, passing through ports 36 and casing33 and again entering the cylinder throughports. 37 and thence to themotos lof the drill or tool. The motor and. itstload causes a back pressure which operates to forcethe ipiston 40 backward against thepressure lof spring 46.
It will be apparent that as the load on the motor varies thebacli pressure on the piston varies also and causes the latter to move backward to varying degrees,uncovering the ports 37 to a greater or less extent as the load increases or decreases, andconsequentlv increas- ing or decreasing the supply to the motor as the load is increased or decreased.
With this arrangement regulations of the feedeverv time the drill is used on different materials is unnecessary as the valveautomatieallv effects the regulation.
It is to be understood of course that the valve ma-y have a wide range of application to engines and motors for various purposes in addition to its application to the portable power drill as here described.
Having now particularly described and ascertained the nature of mv said invention and in what manner the same is to be performed, I declare that what I claimis :-
1. The governing valve herein described comprising a casing andslid- able means thereinoperable bv back pres- sure of the fluid toregulate the fow in proportion to the load.
2. The governing valve herein described comprising a casing, a cylinder extending therethrough and having its opposite ends separated bv a partition, ports in said cylinder leading into said casing on opposite sides of said partition, and a piston operable by back pressure from the load controlling the ports on one side of said partition.
