Year: 1889

page_text: I, WILLIAM ANDREW of 64 Wallshaw street, Oldham in the county of Lancaster,
Machine Pattern Maker do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :—
The objects of my invention are to manufacture a cheap, simple convenient form of
flooring cramp.
In order that this invention may be particularly described and ascertained reference
is hereby made to the accompanying drawings in which similar letters of reference
indicate the same parts in all the figures.
Fig. 1 is a plan of said, flooring cramp, fig. 2 is an elevation, fig. 3 is another
elevation fig. 4 is another view of the retaining pawl F shewn in fig. 2, fig. 6 is a
section of push-bar D and frame A, shewn in figs. 1. 2. & 3, figs. 7 and 8 are two
elevations of lever C.
On the frame A by means preferably of a he and she joint and pin at o I fit a
lever B, and by means of the grooves S as shewn in fig. 6, I fit a push-bar D, and
connect the lever B with push-bar D by means of a connecting link E.
Fitted to lever B, by means preferably of a he and she joint and pin, with a
shoulder b, is another lever with an extension
and a
C,
extension.
slot din said
The arched tie-bar G is attached to the frame A ate by means of a he and she
joint, or any other fastening.
B is a fever with a pin preferably cast in, and bearings to carry retaining
pawl F by means of pivots ff, and from 6 to 4 is a part cast in said lever B,
which serves three purposes, one is, along with p and i, it holds the two sides of
lever B firmly together in one casting, another purpose is, at bit acts as a shoulder
to resist the pressure of the lever C, and another purpose is, at h, it resists the
pressure of the retaining pawl Fon the tie-bar G. At i is a part cast in lever B
prepared to recieve the end of a coiled spring K, and the retaining pawl F is prepared
at to recieve the other end of spring K.

page_text: The connecting link E is joined to Dat m by means preferably of a he and she
joint, and to B at p by means of a hook on the pin p, and the part n inside of B,
prevents the hook end of Ę from lifting off the pin p.
The retaining pawl F is a combination of pawl and two levers land
together and oscilating on the pivots ff.
.
all cast
The cramp is fixed to beam or joist a in the usual manner by means of pawl-lever H,
or any other means of fastening, the arm of the lever is brought forward, and by
means of the shoulder b, brings the lever B forward, the retaining pawl F slipping
along the tie-bar G, the pin p by means of the connecting link E forces the push-
bar D along the grooves S, and setting its crosshead T against the edge of the board.
On the board being brought to the required position for mailing or otherwise fastening,
the retaining pawl F by means of the spring K instantly prevents the lever Band
push-bar D from moving backwards. On the board being fastened, the lever C is
pushed back, and the point pressing against the point on the retaining pawl F,
instantly disengages the pawl F, and withdraws the push-bar D, all in the same
operation, and then the pawl-lever H is disengaged and the cramp removed to another
place.
C
.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
In a flooring cramp the combination of a lever in two parts, or to levers B and C,
the said lever B having a retaining pawl F working against an arched tie-bar G fixed
to, or cast with the frame A. The said lever C fitted to the said lever B to form one
lever. The said lever C so prepared to disengage the said retaining pawl F when
working the said lever C backward. The said retaining pawl weighted or provided
with a spring to keep it to the arched tie-bar G. The whole being constructed
arranged and operated substantially as hereinbefore described and illustrated by the
drawings annexed.
Dated this First day of January 1889.