US 2543813 A
Description (OCR text may contain errors)
3. The positioning means of claim 2 wherein means are provided for attaching the lever arm to the plate member at a plurality of lateral positions.
4. In a speed control for a sewing machine motor and the like wherein the motor is movable into and out of position and the speed of the motor is determined by the relative position of a speed control member carried by the motor, positioning means for said speed control member comprising a member operatively attached to said speed control member at all positions of the motor, and a lever means arranged at one side of the path of movement of the motor and positioned to contact said attached member for causing movement thereof only when the motor is in operating position.
5'. In a speed control for a motor wherein the motor speed is determined by the relative positions of a speed 'control member, positioning means for said member comprising an arm operatively connected to said member, a second arm pivotally mounted with one end adjacent to but normally spaced from the free end of said first arm, a plate member pivotally mounted at one end and operatively connected to the end of the second arm that is opposite the first arm, a lever removably attached to said plate member at the end opposite the pivotally mounted end and beyond the connection of the plate member to the second arm, and means for attaching said lever to said plate member at any point in a line extending generally transversely to the line determined by the pivoted mounting of the plate member and the point of connection of the plate member to the second arm.
6. The positioning means of claim 5 wherein said attaching means comprises a transverse slot in the platemember. 1
'7. In a speed control for a sewing machine or the like wherein the motor is mounted on a base member for arcuate movement into and out of operating position, and wherein the motor speed is determined by the relative positions or a speed control member attached to and movable with the motor, positioning means comprising an arm operatively connected to said speed control member and mounted on the motor, said arm extending transversely to the plane of movement of the motor and being movable longitudinally to vary the position of the speed control member, a pivotally mounted second arm located substantially parallel to the plane of movement of .the motor and at one side of the path of movement of the motor, said arm having one end adjacent the free end of the first arm but normally out of contact therewith when the motor is in operating position, a link member pivotally attached to the end of the second arm that-is opposite the motor and extending substantially parallel to the first arm, a plate member pivotally mounted at one end to which the end of the link member that is opposite the second arm is rotatably attached, said plate member lying substantially at right angles to the plane determined by said second arm and link member and substantially parallel to said link member, a lever arm attached to said plate member at a point beyond the point of attachment of the link member to the plate member, said lever arm lying substantially in the plane of the plate member, means for urging the first arm to a retracted position, and means for urging said second arm, link member and plate member to retracted positions.
8. The positioning means of claim 7 wherein said plate member is provided with a slot at the point of attachment of the lever arm to the plate member, said slot lying substantially transversely to a line determined by the pivotal mounting of the plate member and the point of attachment of the link member to the plate member and said lever arm being provided with a portion engaging said s 1ot for attaching the lever arm to the plate member.
CHARLES H. SPARKLlN.
REFERENCES, CITED The following references are of record in the 40 file or this patent:
UNITED STATES PATENTS Certificate of Correction Patent No. 2,543,812
CHARLES: H. SPARKLIN March 6, 1951 It is hereby certified that error appears in the printed specification of the above numb eredpatent requiring correction as follows;
Column 4, line after' the Word member strike out the comma and insert the same after ends in line 71 and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Oiiice.
Signed and sealedthis 15th day of May, A. D. 1951.
THOMAS F. MURPHY,
Assistant Commissioner of Patents.
March 6, .1951
F. J. STOVER IRON PRECIPITATOR Filed June 29, 1946 Patented Mar. 6, 1951 UNITED STATES PATENT OFFICE 2,543,813 IRON rancrrrmron Fred J. Stover, Rocky River, Ohio Application June 29, 1946, Serial No.'680,477
8 Claims. (01. 210-16) r This invention relates to improvements in means for mixing air with water/t remove iron or other substances therefrom.
One of the objects ofthe present invention is to provide novel means for mixing a gas with a liquid such as the specific applicationof mixing air with a stream of water to precipitate certain iron compounds which are objectionable in a domestic water system.
Another object of the present invention is to provide novel mixing means wherein the untreated stream of water under pressure is fed to an injector arranged to receive air from the upper portion of a tank or reservoir so as to thoroughly mix the .air and water prior to its entry into a domestic water system. i l
Other objects and advantages together with novel arrangements of the specific partswill be apparent from the accompanying drawings and description and the; essential features thereof a will be set forth in the appended claims.
with a liquid, I have chosen to describe the same for specific application to a domestic water system. Many times, the raw water comprises objectionable ingredients suchas iron or sulphur I compounds which may be largely removed by intimate mixture with air. It is one purpose of the present invention to provide cheap but efllcient means for accomplishing this purpose.
In the drawings, a reservoir or tank is'indicate'd at H) for supplying water to a domestic system connected with the outlet pipe II. It is customary in such systems to havewater in the reservoir up to a predetermined level such as that indicated at [2, and the upper portion of the tank is filled with air under pressure so as to carry the water to the variousdesired portions of the system. The water is supplied by any suitable means, such as the rotary pump indicated at 13 and supplied from a well or other source through the inlet pipe [4. The pump is supplied with a snifter valve |5 which in the present instance is electrically controlled responsive to the float It in the tank Ill. The arrangement is such that whenthe float-l5 rises beyond a preof apparatus where a gas is to be intimately mixed 130 determined level the float arm 16a actuates a switch. not shown, in the box I! so that electricity is supplied from the source Ll, L2 to the electrically operated snifter valve l5 to open the valve and admit air with the incoming water passing through pump I3. This increases the supply of air in the upper portion of reservoir l0 until float I6 is lowered, whereupon the switch in the box I! is opened and the snifter valve I5 is closed.
Means-not shown, of any conventional variety is utilizedto control the operation of pump [3 in response to the demand for water in the system. This. phase of pump control does not enter into the present invention.
A mixing chamber l3 ,isprovided, and I have shown a special construction which gives a cheap but eflicient device. The pipe cross 19 is arranged with vertically and horizontally extending armsfor purposes presently disclosed. In the upper vertical arm is threaded a' nipple 20 which is closed'by means of a cap 2| and connected by pipe 22, T 23, and pipe 24 with the upper portion of reservoir Ill. The lower arm of the cross is connected by nipple 25, and reducer 26 with pipe 21', communicating with the lower portion of reservoir I0. If desired, a tank 28 may be provided in pipe 21. to retain the water long enough for the iron compounds to precipitate out of the incoming water stream. Obviously, because of the equalization pipes 24 and 21, the water levelin the mixing chamber will be at"29, on a horizontal level with that indicated at l2. The upper portion of the mixing chamber is filled with air in communication with the upper portion of reservoir l0.
Thestream of raw water discharged by the pump through line 30 is led through a jet 3| to an injector 32. whichhas a discharge tube 33 tube 33. The other end of this tube is supported by a spider 38 in the nipple 39 which is threaded into the right-hand arm of the cross IS;
A pipe connection at 40 is provided for a purpose later explained;
To provide intimate mixing of the water and