US1181133A - Pressure-gage. - Google Patents

Description

w. P. & T. A, HAMMOND.

PRESSURE GAGE.

APPLICATION FILED APR.29. l'910.

Patented May 2, 1916.

'iil* @XL1/bm @com barium uml-@E WJELLIAIVI P. HAMMOND.AND THEODORE A. HAMMOND, OF PASSAIC, NEW JERSEY, ASSIGNORS TO A. SCHRADERS SON, INCORPORATED, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

PRESSURE-GAGE.

,This invention' relates to new and useful improvements in gages, particularly intended to indicate fluid pressure, and more particularly to a coupling or connectmg means for gages.

The invention has for an object to provide .in conjunction with a gage novel coupling or induct pieces in order to facilitate the application of the gage to the receptacle to be charged or inflated under pressure.

With the above and other objects in view, the invention consists in the detail of construction, and in the novel combination of parts to be hereinafter referred t;

In describing the invention, reference will be had to the accompanying drawing forming part of this specification, wherein like characters of reference denote corresponding parts in the several views, and in Which- Figure 1 is a longitudinal sectional view of the gage embodying the invention. Fig. 2 is a view partly in elevation and partly in section illustrating one form of coupling piece. Fig. 3 is 4a view in elevation of the complete gage shown in Fig. l. Fig. l is av longitudinal sectional view of another form of coupling piece. A

lln the drawings, -1- denotes a barrel or cylinder closed at one end by the head -2-, and at the opposite end by the head The head 2- is provided with a stem -4- in which is provided a check valve -8- of any suitable construction which will open to admit air to be forced into or through the device, but which prevents a reiuX of the air.

Carried by the stem -4- and forming a continuation thereof is a tube or duct -19- Specification of Letters Patent.

Patented May 2, 191W.

' Application led April 29, 1910. Serial No. 558,413.

which passes through the Abarrel -1-. The barrel -ltelescopes into a shell or jacket --5-.-, which is formed with closed end f5- the opposite end being open. The tube or duct -19- is surrounded by a stem -9, the bore of the stem -rforming l about the tube -19 a pressure duct -10-. This stem -9- projects through the closed .end -.6- of the jacket -5, and sald projected portion -11 is screwthreaded eXteriorly invorder that it may be i connected to the valve stem of the receptacle to be infiated if desired, but more particularly to the coupling pieces to be referred to. The stem 9- is held against displacement by the disk 12- which is locked to the closed end -6- of the jacket -5 by the binding screws -l3. Near its outer end or the end adjacent the head -2- the stem -9- is provided with a head -14--, which bears against the inner wall of the barrel 1- and forms a pressure-head. Between the. heads-S- and -l4 is arranged a hel1ca1 spring -1'5-, which holds the heads and 14- normally in close proX- imity oneto the other.

T he jacket -15- is provided adjaccn lts lnner lor closed end -3- with a longitudinal slot 1G- and the exterior surface of the jacket along one edge of the slot 1s marked with a scale or graduation -17 indicating various degrees of air pressure in pounds per square lnch or other suitable measure of pressure. The barrel -1- is provided with the encircling mark -18- which forms anindeX indicating on the scale the degree of air pressure as the graduations come into registry therewith.

As above described, thedevice may be employed as a gage without the automatic blow-off or relief feature.

In the operation of the foregoing, the projected portion -11- of the stem -9- is attached to the valve stem or casing of the receptacle to be charged or inflated. At this point, particular attention is directed to the cross-bar or pin 20 intersecting the bore of the projected portion -1l-. This bar or pin -20- is intended to contact 4with to depress and open the valve in the said valve stem as is believed to be apparent. If there be any a1r pressure in the receptacle,

this pressure will be communicated through l suitably coupled to the stem and air is forced through the duct and the pressure of the air will be indicated in like manner. As the pressure in the barrel rises, the barrel moves outwardly, the spring -l5*-, retracting the barrel as the pressure decreases.

It will be seen that the jacket -5- may be rotated independently of the various parts of the gage so that the scale 17- may be brought into any position most convenient for reading without interfering with the connecting of the devicel with the valve-stem of the receptacle, the encircling mark -l8- permitting such reading. Another mode of use is to connect the 4same to one branch of a multiple branched connector as is shown in the drawings, whereupon the inflation pump may be connected to the free end of said connector and the pressure gage caused to perform the added function of a pressure limiting device in the following manner: In order to automatically relieve the pressure after a pre-determined pressure `has been obtained, the shell or jacket '5* is embraced by a jacket -21-,`

which has its outer end closed as shown at -22-- Centrally of this closed end -22-, is arranged the pin -23-, threaded therethrough to project within the jacket -21-. Should it be desired to inflate a' receptacle to 30'pounds, the free or inner edge 2dof the jacket is brought into alinement with the -30- indication of the sca'le -17-, and the jacket -21- is then locked against movement by the clamping nut 2G- threaded to the stem -25-, projecting from the jacket -5- and passing through the slot *27- formed in the jacket -21-. As the pressure causes the barrel 1- to move outwardly, the pin 23.- will contact with and depress the valve- -8- as soon as the mark -l8- of the barrel 1- passes the -30- indication of the scale -17--. This will permit the escape of the air or fluid, communication being had with the atmosphere through the opening '-28- in the end -22- of the jacket. `Thevpin -23- is threaded into place in order that a proper adjustment of the pin with 'relation to the stem of the valve -8- may be had to assure a proper operation of the device.

For convenience of attachment to a receptacle, more especially to a pneumatic tire, when applied, either of the coupling pieces or induct couplers shown in the drawings may be employed. The coupler-29 is arranged at right angles to the gage, and is provided with a central bore -30- having located in one end the check valve -31, to permit the forcing of air therethrough, but preventingA the exit of air. The opposite end of the coupling is provided with a nipple -32- for connection with the valve stem of the receptacle, and may be of any desired construction. The bore of the nipple is intersected by the pin or bar S3- for the same purpose as specified with relation to the pin 20- The coupler piece -29- is provided with a boss 34- having a bore B5- which may be provided with a check valve if desired similar to check valve 31. Such a form is shown in Fig. 2. The bore -35- is adapted to register with the bore of the projection -11 of the stem 9. In order to afford such registry, the free end of the bore is provided with athreaded recess fo-r the reception of the projected portion l1-. Bore -35- of the boss conimunicates with the bore -30-.

The operation of the device with the coupler piece attached, is thought to be obvious. In applying the gage, it is believed to be apparent that the pulsating pressure of the pump is delivered directly into the receptacle. The gage is therefore affected by the still pressure in the receptacle. The coupler piece shown in Fig. Q of the drawing is provided with an enlarged central portion or chamber -36-.

The coupling piece shown in Fig. 4 comprises a plurality of branches 37-, each branch being provided with an inwardly opening check valve 38h in its passageway, similar in construction to valves -8- and -31- heretofore described. The coupler is also provided with a nipple -39- which is provided with a valve opener similar to that shown at 2O in Fig. 1, for connecting the device to the valve stern casing of the tire. This form of connecting piece shown in Fig. 4L- enables the pump to be attached to one branch, a pressure gage to another branch, and permits the release of an excess o-f pressure upon the tire or receptacle to which it is attached by the depression or 'opening of the valve in the remaining or other branch.

When instantaneous gages are used, that is, gages that are not coupled permanently and directly to the valve casing, but are merely held against the valve casing for a sho-wn in Fig. *land use but twov branches, one to which the pump connection is applied, and the other for the momentary application of the gage and the release of an excessive pressure when required.

While we have illustrated a preferred form of pressure gage coupling, we would have it understood that we are not limited to the details of construction shown and described, as the same may be varied and still come Within the ,scope and tenor of the appended claims.

The pressure gage per Se is claimed in our application, Serial No. 58,887, led @ctober 30, 1915. y

The construction of coupling having means adapted to be operated to vent air while a gage is applied to the coupling, as shown for example in Fig. 4, is not claimed specifically' herein, but forms the subject-matter of our divisional application Serial No. 84,276, filed March 15, 1916.

Having thus described' our invention, whatwe desire to secure by Letters Patent is,

1. In combination with a gage, an attaching device therefor, provided with a plurality of branches; check valves in said branches, and means for coupling the device to the valve casing of a pneumatic tire, and

means for establishing open communicationy with the interior of the tire in the act of applying the device to the valve casing.

2. In combination with a gage, an attaching device therefor, comprising a body provided with passageways; check valves positioned in two end portions of the device, and an attaching nipple in the other end portion of the device, and means consisting of a rigid pin for engaging and depressing the valve of a pneumatic tire, and opening communication between the passageways and the interior of the tire in the act of applying the device to the valve casing of the tire.

3. In combination with the valve casing of a pneumatic tire, a connecting device 'comprising a body portion having a plurality of communicating passageways; check valves in said passageways; a coupling nipple carried by the body portion; and means for automatically depressing the valve of the valve casing in the act of applying the device thereto.

4. In combination with a pneumatic tire, a gage and a source of fluid-supply; a detachable connecting device consisting of a body portion'provided with a\plurality of passageways adapted tb establish communication between a tire, jgage, and source of fluid-supply; a plurality of check valves in said passageways, and an attaching nipple carried by said device, provided with means for depressing the valve of the tire in order that the pressure therein may be indicated on the gage.

5. lIlhe combination, in an inflation connection for pneumatic tires, of a triplebranched tubular body, one branch thereof being provided with a valve opening element and a valve nipple coupling, and each of the Aother branches being provided with an inwardly opening valve.

6. 'Ihe combination of a pressure gage, means for supplying compressed gas, a conduit having terminals adapted to be connected one with said pressure gageand the other with said means, a valve in the pressure gage terminal, and means carried by said pressure gage for automatically opening said valve when said pressure gage is connected to said terminal.

7. 'Ihe combination of a pressure gage, means for supplying compressed gas, a conduit adapted to be attached to a pneumatic tire valve and having means for unseating the valve member therein, and also having terminals adapted to be connected one with said pressure gage and the other with said gas supplying means, valves in said terminals and means carried by said pressure gage for automatically unseating the valve in that terminal with which it is connected.

8. A device of the character described having three branches, the first having means for connection with a gage, the second having means for connection with a pump or the like, and the third having means for connection with a tire valve, and an automatic check valve in said iirstnamed branch.

9. A coupling device having a plurality of openings, one for connection with a gage and one for connection with a tire valve, and an automatic check valve locatedin said device near the point of connection with the gage and adapted to be closed when the gage is removed.

10. A device of the character described having three branches, the iirst having means for connection with a gage, the 'second having means for connection with a pump or the like, and the third having means for connection with a tire valve, and a valve in said first-named branch.

11. iIn a device of the character described, the combination of a part having a means for connection with a gage, a check valve in said part, agage having means for unseating said valve, said part having also means for engaging a tube or the like, and means for engaging a tire valve or the like, said last-named means having a delater for unseating the tire valve.

12. A coupling of the character described having a plurality of passageways greater said nipple being of substantially the same diameter as said tire valve.

XVILLIAM P. HAMMOND. THEODORE A. HAMMOND.

In presence of- E. C. RYDER, P. FRANK DONNELL.

Images