US942405A - Non-scalding shower-bath cock. - Google Patents

Description

D. W. MGNEIL.

NQN-SGALDING SHOWER BATH COCK.

APPLICATION FILED AUG..4, 1908.

Patented Dec. 7', 1909.-

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DANIEL W. IVICNEII, OIEl CINCINNATI, OHIO, ASSIGNOR TO THE JOHN DOUGLAS COM IANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

NON-SCALDING SHOWER-BATH COCK.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application led August 14, 1908. Serial No. 448,464.

.j a citizen of thel United States of America,

and resident oit Cincinnati, county of Hamilton, State of Ohio, have invented certain new 'and useful Improvements in Xon- Scalding Shower-Bath Cocks, of which the following is a specification.

My invention relates to shower bath cocks which regulate the flow of hot and cold water to the shower by means of the movement of one handle.

My invention is especially adapted forA use in a system of baths wherein there are a series of adjacent showers. Heretofore there have been in use cocks for regulating the flow of cold,l medium or hot water from the shower, by means of the. movement of a single-handle, which, in its initial movement would open the cold water, upon the further movement would admit hot water to be mixed with the cold, and upon a 'still further movement would increase the proportion ot" the hot water in comparison with that of the c'old. But, in these cocks heretofore used, should one bather have turned the handle to an `extent such as tocausev a iow of warm water, and a person in the adjacent shower should suddenly turn on the cold water, this sudden demand upon the cold water ,supply Howing to the first shower, would reduce the supply to an extent such that the relative proportion of the cold to the hot water would be'so small, that the first bather would be scalded. The

cocks heretofore used have f been open like render the supply of water difficult of regu-v lation.

It is the object of my invention to provide a non-scalding shower bathi cock, which will have an automatic means of stopping the flow of water should a sudden demand be made upon the cold water supply of one'cock, and to supply a cock the parts of which are little liable to wear, and in which the operation is not. so much affected by any wearing ofthe parts. This object is attained by theV means described in the specification and illustrated in the accompanying drawings, in which,

Figure l is a sectional View of a cock embodying my invention taken upon line -w of Fig. 3. Fig. 2 is a sectional View taken upon line -y-g/ of Fig. l. Fig. 3 vis a sectional view taken upon line e-fv ofF ig. l.

Referring to the parts: The valve casing is divided by suitable partitions into a cold water chamber,'a,a hot water chamber b, an elongated mixing chamber, c,- an exit chamber, cZ, and a pressure chamber, e. Cold water is to be led into chamber, a, by means of pipe, a', and hot water is to be led into chamber, I), by pipe, b. .The water is to be led from the exit chamber, aZ, to the showers by means of a pipe, d".

Between the cold water chamber, a, and the mixing chamber, c, is a valve seat, a2, against which a valve, A, is seated. Betweenthe hot water chamber, Z), and the mixing chamber, c, is a' valve seat, b2, against which valve, B, is seated. Between the exit chamber, (Z, and the mixing chamber, c, a valve seat is formed by means of a ring, d2, with the' internal bore of which piston valve,D,hasasliding but watertight contact. Between the exit chamber', (Z, and compression chamber, c, a valve seat c, is formed, against which a disk, (Z3, seats. Disk, (Z3, is formed integral with the valve stem (Z4, ofthe piston valve, D. The valve stem, (Z4, has secured upon it a cup, (Z5, which contacts the walls of the compression chamber, c, which is connected by means of a branch pipe, e2, with the cold water pipe, a, the entrance ot' the pipe, ci', being between the end wall of the chamber, e, and thev cup, (Z5. The pipes, a, and b, have valve seats formed in their .ends against which check valves, a3, and b,

are seated.

The means of moving the valves are as follows: The valve casing, F, has a bonnet, F, secured Vupon it, the internal screwthreads of which, are engaged by the screwthreads of alcollar, g, formed integral with the main valve stem, G, to which the handwheel, G', is secured. Valve stem, G, stands in alinement with the piston valve, D, which is held in contact with the valve stem, G, by t-he pressure of the water in the chamber, e. Valve'stem, G, has adjacent t-o the collar,- g,'screwthreads, g', whose pitchy is greater than that ofthe pitch of the screwthreads, g, being made preferably twice the pitch. Within the elongated mixing chamber, c, is a yoke, H, whose ends have screwt-hreaded recesses, to receive screws, at'and b4,.to which the stems, a5' and b5 of the valves, A- and B, are secured respectively.

Stem, as, has adjacent to the valve, A, a re duced portion, a7, of a diameter less than the diameter of the valve seat, q2, and adjacent to the yoke, a collar, a8, of 'a diameter greater than the valve seat, a2. The stem` of valve, B,'has a portion, 67, adjacent to the valve of a diameter equal to the diameter of A and' B, respectively.

munication between the mixing chamber, 0

chamber,

The operation is as follows: Y In F ig. l the cock is shown in its closed position, viz. the stem, G, occupies a position such that the disk, D, closes the opening between the mixing chamber, c, and the exit chamber, d, and

' the valves, A and B, are both seated. When the handle, G', is rotated to the left, it carries the valve stem, G, in a direction away from valve seat, d2. The pressure of water in the chamber, c, causes the valve, D, to follow the valve stem, G, so that the disk, D, passes beyond the valve seat, d2, and opens the comand`the exit chamber, d. The rotation of the valve stem, G, causes the yoke, H, to move downward upon the valve stem, G, a

'35 `distance twice that of the movement of the 'valve stem outward from the valve seat, d2.

The result is that the valves, A and B, are

moved inward away romthe valve seats,

a2 and b2. The movement of the valve, A, brin 's the reduced portion, a7, of the stem within the opening of the valveseat, so that cold water flows from the chamber, a, into the mixing chamber and thence into ther, exit The enlargement, 127, of the stem of the Ahot water valve, lls the opening in the valve seat, b2, and prevents the ,passage of hot water into the mixing chamberf. Upon a further rotation of the hand-wheel, G, in the same direction, the tapered part of the valve stem, 67, will come adjacent to the valve seat, b2, so that hot water will then pass 'into the mixing chamber to be admixedwith the cold water. A further rotation of the hand-wheel, G', will draw the tapered part, as ofv the valve stem, a5, toward the valve seat, a", thus diminishing the cold water supply, whilethe reduced portion, b5, of the hot water valve stem stands within the valve of hot to cold water. When the rotation of f the valve stem has brought the enlargement,

as, to seat against the valve-seat, a2, it isv -sion chamber, e, and the pressure in the Vmixing and exit chambers will then carry the 4valve disk, D, to its seat, d2, closing vthe communication between the mixing chamber and the exit chamber and cuttingmfi' the discharge of the shower, so that abather could not be scalded.

The function of the check valve, a3, is to prevent thewater from the mixing chamber flowing into the cold water chamber, a, and thence into the compression chamber, e, when a reduction of pressure in the last named chamber occurs.

Whatl I claim is:

1. In a hot and cold water cock, the combination of a valve casing having a mixing chamber and an exit chamber communicating with the mixing chamber, cold and hot water valves adapted to regulate the ow of water to the mixing chamber, a third valve for controlling Vthe communication between the exit and the mixing chambers, and a means of communicating the pressure of the lcold water to the third valve to carry it away from its seat, whereby when the pressure of the Coldwater to thev cock is dimin- .water valves in the casing and adapted to regulate the communication between the hot and cold water chambers and the mixing chamber, a third valve adapted to regulate the communication between the mixing and the exit chambers, a yoke, means of coupling the hot and cold water valves to the yoke, a valve stem having two sets of differential screw-threads, one engaging the casing, -the other set engaging the yoke, and means of communicating the movement of the stem to the third valve to carry it toward its seat, whereby the movementl'of the valve stem regulates the positions ofthe-hot and cold water valves and the third valve.

3. In a hot and cold water cock' the combination of a casing having withinit an elongated mixing chamber, a hot, water chamber, a cold water chamberand an exlt chamber upon the same side of the mixing chamber, the wall between said chambers having openings in it, a hot water, a cold water and an exit valve seated against the respective openings, a main actuating stem and a n'ieans of connecting it With the valves whereby the movement of the stem simn1 tnneously moves the three Said valves.

4. In a hot and cold Water cock the lcombination of :L casing having Within it an elongated mixing chamber, a hot Water chamber, a cold Water chamber and an exit chamber. upon the Same side of the mixing chamber, the Wall between Said chambers 10 having openings in it, a hot Water, a cold Water and an exit valve seated against the respective openings, u yoke, means of connecting it to the hot and cold Water valves, a differential screw engaging' the casing and the yoke, and means of causing the exit 15 valve to move with the screw.

' DANIEL WV. MGNEIL.

Witnesses:

WTALTER F. MURRAY, AGNES MCCORMACK.

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