US1304895A

US1304895A - Plate-tightening device

Info

Publication number: US1304895A
Authority: US
Publication date: 1919-05-27
Anticipated expiration: 1936-05-27

Description

J. P. IVICBRIDE.

PLATE TIGHTENING DEVICE.

APPLxcATloN man sEPT.23.191zs` 1,304,895. Patented May 27, 1919.

-Ffg 3.

WM BW \4 ATTORNEY FICE- JAMES P. MCBRIDE, OF SEATTLE, WASHINGTON.

PLATE-TIGHTENING DEVICE.

Application led September 23, 1918.

To all wiomz't may concern:

Be it known that I, JAMES P. MCBRIDE, citizen of the United States, residing at Seattle, in the county ,of King and State of Washington, have `invented certain new and use-ful .Improvements in Plate-Tightening Devices, of which the following is a specification.

This invention relates to improvements in plate tightening devices and has for its principal object to improve upon my previous application Serial No. 249,920, in that, I provide improved and novel means for `tight- -ening the plates without the necessity of passing a stem through coperating holes in a pair of plates; to provide improved means for holding the plates in tight contact after a bolt has been passed through coperating holes while the nut on the said bolt is tightened up. It has been found that too much time is lost in passing the stem of the device as shown in my previous application through the cooperating holes and fastening a nut on the inside before tightening up and it has further been found advisable to provide some means for finally tightening up bolts which have already been passed through the plates and which it is impossible to quickly and eiiciently tighten in the usual manner with a wrench. My device as herewith shown is an auxiliary arrangement to be used in connection with the device as shown in my previous application and is designed to accomplish the objects `as vherewith set forth.

Other objects will appear as my invention is more fully explained in the following specification, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure 1 is a front elevation of my device shown attached to a fragment of a fluid cylinder and stem, with parts. broken away. Fig. 2 is a side elevation of same. Fig. 3 is a plan view of the fork of the device as shown in Fig. 1. Fig. 4 is a plan view of a yoke as shown in Figs. 1 and 2.

Referring more particularly to the drawings numeral 1 indicates a portion of a hydraulic or other fluid pressure cylinder which is provided with a. threaded stem 2 and a cap 3 similar to the same elements shown in m previous application referred to above. nut 4 screws .on to the lower threaded end of the stem 2 which projects i Specification of Letters Patent.

Patented May 27, 1919.

serial No. 255,359.

passed through coperating holes in the saidv plates. A nut 8 on bolt 7 holds the plates together. In order to avoid the tedious and sometimes almost impossible job of drawing the

plates

5 and 6 tightly together by means of bolt 7 and nut 8 I provide the fork 9 having aplurality o f legs which'has a central opening 10 at right angles to the surface of the plates .and through which stem 2 is passed. The nut 4 on stem 2 holds the fork from dropping off of the stem.y A yoke 11 is provided with a hole 12 through its upper jaw and a slotted hole 13 through its lower jaw. The lower end of stem 2 passes through the hole 12; thus the nut 4 holds the yoke inv coperation with the stem and prevents their accidental separation. In operation an auxiliary nut 14 is threaded on to the end of bolt 7 and the slotted end of the yoke is slipped over the bolt 7 inside the nut 14 while the legs of the fork 9 are brought in contact with the surface of one of the plates. When the pressure is applied to cylinder 1 the stem 2 is drawn into the cylinder with considerable pressure and the re-action of the cylinder is against the top of fork 9 and through the fork against the outer plate 6 while the pull of the piston is transferred through the yoke 11 to the bolt 7 whose head bears against the inner plate 5, thus drawing the two platestightly together. While the plates are thus held the nut 8 is screwed down tightly without acting against the resistance of the plates. This screwing down of the nut 8 can easily be done by hand eX- cept for the final half turn which sets it up tight. Immediately upon the release of the pressure in cylinder 1 the yoke is slipped from beneath the nut 14 and the device is ready for another operation. My device is removably attachable to the bolt 7 and may be used for drawing any two members other than plates together while bolting .up is being done. The simplicity of the construction, ease of attachment and'quick operation are the important features of my device which is now being used extensively in ship construction in the bolting up process. Much time is saved 'over the usual methods of bolting up by use of my device.

While I have shown a particular form of embodiment of my invention, I am aware described my invention, what I claim as new and desire to protect by Letters Patent, is

Claims: l. In a device for pulling together a pair of members which are held loosely together by means of a bolt -and nut passing there.

through, the combination of a pressure cylinder having a cap, a stem passing therethrough, means intermediate the said cap and one of the said members for holding the cap and said member in spaced relationship, means for engaging the said stem and the said bolt, whereby a pulling force acting on the said stem is transferred to the said bolt /and thence to'one of the said plates and the re-action of the said pulling force is transferred to the other of the said plates through the said spacing means.

, 2. In a device for drawing a pair of plates together, the combination ofa pressure cylinder having a cap and threaded stem extending through and beyond the said cap, a fork member intermediate the saidl cylinder and plates, a bolt passing through coperating holes inthe said plates, and means for engaging the outer end of the said stem and the extended end of the said bolt, whereby a pulling force on the said stem is-transferred to the said bolt and the re-acting force of the cylinder is brought against the said plates through the fork.

3. In a device of the class described the combination of a iuid pressure cylinder, a threaded stem extending beyond one end of the said cylinder, a fork slidably mounted on the said stem, andl a yoke removably attached to the said stem and adapted to en-` gage a bolt, whereby When the fork is in contact with the object in which the bolt is secured a pull may be exerted-upon the said bolt.

In testimony whereof I afix my'signature in the presence of a Witness.

JAMES P.` MCBEIDE.A