US787347A - Handle for pneumatic tools. - Google Patents

Description

PATENTED APR. 11, 1905.

J. H. TEMPLIN,

HANDLE FOR PNEUMATIC TOOLS.

APPLICATION FILED SEPT.22, 1903.

2 SHEETSSHEET 1.

PATENTED APR. 11, 1905.

J. H. TEMPLIN.

HANDLE FOR PNEUMATIC TOOLS.

APPLICATION FILED SEPT. 22, 1903- 2 SHEETS-SHEET 2.

ATTORNEY Usuran STATES Patented April 11, 1905.

PATENT tripe.

JOSEPH H. TEMPLIN, OF NEW YORK, N. Y., ASS IGNOR TO PHILADELPHIA PNEUMATIC TOOL COMPANY, A CORPORATION OF NEW JERSEY.

HANDLE FOR PNEUMATIC TOOLS.

SPECIFICATION forming part of Letters Patent No. 787,347, dated April 11, 1905.

Application filed September 22,1908. Serial No. 174,160.

To It whom it may concern.-

Be it known that I, JOSEPH H. TEMPLIN, a citizen of the United States of America, and a resident of the borough of Brooklyn, New York city, State of New York, have invented certain new and useful Improvements in Handles for Pneumatic Tools, of which the following is a specification.

My invention relates to improvements in handles for pneumatic tools used for chipping, riveting, and the like; and the essential object is to reduce the labor of the operator in opening the admission-valve of the tool.

Another object is to facilitate varying the operation of the tool as hereinafter described, reference being made to the accompanying drawings, in which- I Figure 1 is a vertical section of my improved handle. Fig. 2 is a plan view. Fig. 3 is a detail in vertical section, showing-a modification. Figs. at and 5 are vertical sections showing other modifications. Fig. 6 is a view of an automatic controlling-valve for the air operating the admissionvalve.

A represents the stock, which has a socket Z) at one end for suitable connection with the chipping, riveting, or other tool to be operated and through which the air is supplied to the tool by a passage a, and on the other end is a hand gripping-piece or handle proper, c. The balanced piston admission-valve (Z is located wholly outside of the handle proper as well as its grasping portion, intermediately of the said ends,for controlling the admission of compressed air or other fluid, which is received from any suitable source through a conductor 6 and enters,thevalve-chamberf through a passage g, which is also located wholly outside of the handle proper as well as its grasping portion. A spring h is employed in connection with the valve for closing it, said spring having aconstant tendency thereto. Although a lever is commonly employed in connection with the valve for opening it against the force of the spring, the lever being worked by the thumb of the hand of the operator grasping the handle, the strain on the thumb is very tiresome, because the spring is of necessity somewhat powerful to insure prompt action of the valve in closing, particularly when resisted by dirt, which is sometimes the case. I therefore provide for the application of air-pressure in lieu of the thumb-lever for opening the admission-valve, which in one form of my apparatus I effect with an auxiliary thumb-actuated valve, as i to control it, which, owing to the small quantity of air necessary to open it, may be very small and light, and therefore less tiresome to the operator. This is also a balanced piston-valve and has a light coiled spring j to close it. Said valve is arranged to control a branch air-passage lt', leading from passage g to the end of valve (1?, on which force is applied for opening it, and projects at the upper side of the handpiece a suitably for the use of a thumb-lever Z for applying thumb-pressure ,on' its head m, if desired, as in Figs. 1 and 2, or such lever may be omitted, as in Fig. 3, and the thumb may act directly on the head m.

a is the exhaustpassage from valve d. It is closed when valve opens passage 70 and is opened when valve 2' is closed by spring 1'.

I find that by placing the thumb on the exhaust n and not touching the lever Z or the head of valve through leakage--in case said valve is ground slightly small or slightly taperedenough air will enter to operate valve d, and the operation may be controlled as the exhaust is so controlled by the thumb.

In the modification represented in Fig. 4 it will be seen that the valve 2' may be omitted and the operation of valve d may be controlled with a constant flowing supply of air by means of a needle-plug, as 0, set in soas to throttle passage is, but allowing enough air to pass to operate valve d when the full force takes effeet on said valve, with a vent-passage p intermediate of said plug and valve 01 to reduce the pressure between them and allow valved to remain closed, said vent adapted to be closed by the thumb or hand of the operator, and thus cause pressure on valve (1 to increase and open it when desired. The necessity forto the fact that it is not practicable to construct passage 70 only large enough to permit the passage of the quantity of air needed. The cutting or boring tool must be larger for the requisite strength, or the core in case the passage is cored. Instead of this plug, however, an automatic needle-valve may be used, as in Fig. 5, which will limit the escape of air to a greater extent, such a valve being represented at 1' in the air-passage]: and separately in Fig. 6 with a springs for closing it and being slightly reduced at and fluted at u, so that a slight quantity of air will exhaust through passage n, and by closing said passage with the thumb or hand pressure will Y backup against valve 7' and open free passage of air in suflicient quantity to operate valve 01. The operation of such a valve may be graduated and the supply of air to valve d controlled according as the passage 01. is opened more or less, and it will not jar loose.

The valve 01 may be tapered at q to open passage g gradually for more effective graduation of the action of the chipping or other machine when less than full power is to be applied and full pressure is not admitted through passage it.

Itiwill be apparent to those skilled in the art that the pressure-supply duct 9, which conveys the motive fluid to its passage a on tside of the handle, is in each instance located Wholly outside of the handle as well as outside of the grasping portion thereof. The motive fluid flowing through the passage 76 in each instance is utilized solely'to actuate the valve (1, located outside of the handle, and does not pass into the passage a. The valve 0? is located wholly outside the handle proper as well as its grasping portion or part 0, which alone constitutes the handle.

I am aware that it is a common right not only to locate the pressure-supply duct at a point inside or outside the handle or its grasping part, but also to locate the throttle-valve at any desired point inside the grasping portion of the handle, as seen in the British pat: cut to Low,- No. 1,778 of 1865. My present invention therefore consists, broadly, of a fluid-actuated throttle-valve located wholly structures of the prior art do I-herein make my claim.

It will be apparent that slight changes may be made by those skilled in the art in the'construction of the throttle-valve and location of the ports and passages employed, and I do not, therefore, desire in every instanceto be limited to the precise construction I have herein shown and described. A

What I claim as my invention is 1. The combination with the admissionvalve of a pneumatic handle for chipping, riveting and other machines, of fluid-pressure means for opening said valve holding it open and for graduating its closing, and means constantly tending to close said valve against said opening means, said opening and closing means controlled by regulating the exhaust of the opening means.

2. The combination with the admissionvalve of a pneumatic handle for chipping, riveting and other machines, of fluid-pressure means for opening said valve, holding it open and for graduating its closing, and means constantly tending to close said valve against said opening means, said opening and closing means controlled by regulating the exhaust of the opening means by the hand of the operator. v

3. The combination with the admissionvalve of apneumatic handle of chipping, riveting and other machines, of fluid-pressure means for opening said valve by pressure thereon, means constantly tending to close said valve against said opening means, means for. exhausting said pressure, and means for controlling the exhaust by throttling it by the thumb or hand of the operator of the handle and thereby controlling the operation of the admission-valve.

4:. The combination with the admissionvalve of a pneumatic handle of chipping, riveting and other machines, of fluid-pressure means for opening said valve, means constantly tending to close said valve against said opening means, means for controlling said fluid-pressure consisting of a constant restricted air-supply and a normally open 'exhaust therefor adapted to be throttled by the thumb or hand of the operator for effecting operation of the admission-valve.

Signed at New York this 8th day of September, 1903.

JOSEPH H. TEMPLIN. Witnesses:

A. P. THAYER, HENRY LE GENDRE.

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