US71987A

US71987A - Improvement in floor-clamps

Info

Publication number: US71987A
Authority: US
Publication date: 1867-12-10
Anticipated expiration: 1884-12-10

Description

PATENT OEEICE.

WILLIAM CONNER AND CHARLES W. MITCHELL, OF WILMINGTON, DEL.

IMPROVEMENT IN FLOOR-CLAMPS.

Specification forming part of Letters Patent No. 71,987, dated December 10, 1867.

To all whom it may concern:

Be it known that we, WILLIAM CONNER and CHARLES W. MITCHELL, of the city of Wilmington, in the county ot' New Castle and,

State of Delaware, have invented a new and Improved Clamp for Clamping Ship-Timbers, Flooring, and other Carpenters7 Work; and we do hereby declare that the following is afull, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a perspective view; Fig. 2, a front View.

a is the frame; I), the screw used for forcing the work in its place; c, the bed for the working of the screws; d d, screws for moving the wedges and holding them I in place when the clamp is set; e e, blocks for the sliding ci' the wedges; and f f are the wedges,p1ayingor sliding in these blocks by means of the' dovetailed ways or groovesg g and tongues 1L h. M are plates for holding up to their places, by means of the screws d 61, these wedges and blocks.

To enable others to make and use our in-4 vention, We will proceed to describe its construction and operation.

We construct our clamp of iron, providing a frame, a., with a stationary bed -bloek, c, for working the clamping-screw b obliquely through it. Under this frame, and suspended to it by means of the screws d d and the sup- -wedges f f play.

porting sliding plates t' i, we set the grooved blocks e e, in which the dovetailed tongued These blocks and wedges are moved, by means of the plates and screws, t0 the required distance or width of the timber to which it is to be fastened, and when set to its place for working, the wedges, playing in the blocks, tighten and hold the clamp to its place. t

In operating this clamp we adjust it to the joist or timber by means of the above-de scribed blocks and wedges, and their setscrews and plates, and then drive home the plank, board, or timber to the desired place by operating with the clampscrew b.

We do not claim the screws or wedges in themselves, as we are well aw-are that screws and wedges have been and are used in clamps 5 but What we claim as our invention, and desire to secure by Letters Patent, is

The combination 0f the frame a, with the screws b and d d, with the wedge-blocks c e, wedges f f, and plates t' i, constructed and arranged, as herein described, to operate as a clamp for clamping ship-timber, iiooring, and other carpenters work.

WM. CONNER. CHARLES W. MITCHELL.

Witnesses:

WM. B. WIGGINs, EDWARD J. DOUGHERTY.