US674215A - Clamping device. - Google Patents

Description

Patented May |4, Ism. G. N. PALsEn a T. & F. H. MccALL.

GLAMPING DEVICE.

(Application led pee. 11. 1900.)

(No Model.)

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UNITED STATES PATENT OEEICE.

GEORGE NEAL PALSER, TIBERIUS MCCALL, AND FRED H. MCOALL, OF NORTH LOUP, NEBRASKA.

CLAMPING DEVICE.

SPECIFICATION forming* part Of Letters Patent N0. 674,215, dated May 14, 1901.

Application led December 11, 1900. Serial No. 39,575. (No model.)

To all whom it may concern,.-

Beit known that we,GEoRGE NEAL PALSEE, TIBERIUs MOCALL, andv FRED H. MoOnLL, citizens of the United States, residing at North Loup, in the county of Valley and State of Nebraska, have invented certain new and useful Improvements in Clamping Devices; and We do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, Which form a part of this specification.

This invention relates to an improved clamp of that general class employed in connection with Artesian or other wells for temporarily suspending a section of pipe at a desired height therein while another section is being attached thereto or detached therefrom, or for other purposes.

The primary object of the invention is to provide vm eans whereby a section of pipe may be clamped in elevated position and also prevented from turning or rotary movement.

With such object in view the invention con-` templates the employment of a primary clamping means adapted to engage a section of pipelongitudinally thereof and a secondary clamping means adapted to engage a section' of pipe at substantially the same plane as the primary clamping means, but circumferentially thereof.

The invention also relates to improved details and combinations of the several parts, which will herein more fully appear.

In the accompanying drawingsan embodiment of the invention is delineated for the purpose of illustration, and in hereinafter referring to the same like reference characters will refer to corresponding parts in both views.

In the drawings, Figure l is a side elevational view of the construction, a section of pipe beingshown by dotted lines; and Fig. 2is a plan view thereof.

Referring more speciiically to the drawings, A represents a strong base-plate adapted to rest upon the ground or other suitable support,and B a centrally-arranged opening therein through which the pipe i's adapted to pass.

Laterally of said opening is a guide-opening O to facilitate the placing of the base-plate in proper position around the pipe. Adapted to clamp the pipe longitudinally thereof is a cam D, serrated or otherwise roughened upon its outer surface, which is pivoted at d and normally held in forward or operative position by the weighted lever Efto one side.

of the plate A. Arranged opposite the biting or clamping edges of the cam aforesaid is a slide-block F,working in the guidewayf and provided with an elongated shank f",- adapted to be adjusted longitudinally of the opening f2 in the base through the medium of an adjusting-screwfg. By reason of this block F being Worked back and forth it will be apparent that the size of the opening B through the base may be varied to accommodate various sizes of pipe desired to be operated upon. To limit the forward' movement of the cam, a lug or projection d is formed at its lower end, the lug being designed to contact with a shoulder d2 on the base.

The portion of the device thus far described will serve to suspend a pipe at the desired height in a well, but will not always be effective in preventing a rotary or turning movement thereof when a section is being screwed to or from the same or otherwise attached in a 1n an ner to require a rotary or turning movement, and to accomplish this desideratum the following mechanism is provided: Working in the guideways G on the surface of the baseplate A,near the respective edges thereof, are jaw-carrying members G' G2, the former carrying at its end a rigid inclined toothed jaw g and the latter a corresponding toothed jaw g', pivoted at g2. The one jaw is pivoted so as to be capable of being swung outwardly (dotted lines, Fig. 2) until the pipe is inserted in the opening B in the base-plate. When the pipe has been inserted, the pivoted jaw is closed, and a projection g3 at the end thereof is engaged by a link or other fastening means g4 onthe jaw g to prevent the separation of the jaws. A cross-bar h connects the rear ends of the jaw-carrying mem-bers, and

to the cross-bar a U -shaped leverH is secured at one end and at the opposite end is pivotally connected to a swinging upright H', the upper end of` which is in turn connected through IOO the medium of pivoted links H with the pivoted operating-lever I. It will thus be seen that as the operating-lever I is pulled backward the pivoted links will correspondingly operate the upright, and by reason of the U- shaped lever the jaws will be caused to bind the pipe circnmferentially and prevent the same from turning. A forward movement of the lever will manipulate the several parts in a man neropposite that just described. Some means must he provided for locking the jaws against movement when in clamping position, so we provide at the upper end of the swinging uprighta projection or tooth Z,\vhich is adapted to be engaged by the teeth of the gravity-catch L, pivoted at Z' to the base-plate and normallyinclined forwardly and held in operative position by its own weight.

Many changes or alterations of the several parts and arrangement of parts in the construction just described may be readily made Without departing from the spirit of the invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. A clamping device comprisinga base provided with a through-opening, gripping means slidable on the base and means for actuating the gripping means comprising a main pivoted operating-lever, a pivoted upright, connections between the lever and upright and connections between the upright and the gripping means, substantially as described.

2. A clamp com prising a base provided with a through-opening, a grippingmeans, an opposing gripping means sldable back and forth on said base, and means for actuating said opposing gripping means comprising a main pivoted operating-lever, a swinging upright, connections between the upright and lever, connections between the upright and the gripping means, a lug or projection on the swinging upright, and a catch adapted to engage the lug or projection to lock the parts in adjusted position, substantially as described.

In testimony whereof we aiix our signatures in presence of two witnesses.

GEORGE NEAL PALSER. TIBERIUS MCCALL. FRED H, MGOALL. Witnesses:

JOSEPH H. CLARK, HANNIBAL B. SAMPLE.

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