Improved Clamp-buckle for Braces, Belts, and the like. to be
Year: 1892

page_text: Date of Application, 13th Aug., 1892-Accepted, 1st Oct., 1892
COMPLETE SPECIFICATION.
Improved Clamp-buckle for Braces, Belts, and the like.
to be
I CARL HOLLWEG of 136 Alléestrasse, Barmen, Germany, Manufacturer, do
hereby declare the nature of this invention and in what manner the same
performed, to be particularly described and ascertained in and by the following
statement:—
My said invention relates to an improved construction of clamp-buckle for use
with braces or belts or for other purposes where a flat band or strap is required to
be readily adjusted and held as in the case of the straps of sliding windows, Venetian
blinds and the like.
I will at once refer to the accompanying drawings which illustrate my said
invention.
A buckle made in accordance therewith has a frame work in which is held the
pivoted cam roller r the catch plate b and the spring f. The strap 9. is passed
between the cam roller r and the upper edge of the catch plate as shown in
Fig. 2. and is firmly held as seen in Fig. 1. as soon as a pull is exercised in the
direction shown by the arrow.
The retention of the strap is ensured by the front leaf of the cam roller turning
and gripping the strap against the catch plate with a pressure which augments with
the pull of the strap. The catch plate b is a two armed lever pivoted at o o in the
buckle frame. If the bottom portion of the catch plate is pressed backwards
against the spring f in the direction of the arrow in Fig. 2 the top portion moves
forwards and slightly rotates the cam roller » thereby releasing the grip on the
strap and enabling the strap to pass through the buckle. On the release of the
catch plate the least pull suffices to clamp the strap against the upper portion of
the catch plate which bears backwards against a fixed support a in the buckle
frame. In Figs. 1 & 2 this support is provided by bending over the flat frame.
In Fig. 3 a separate cross bar a is provided for the purpose of supporting the
catch plate.
This figure also shows a modification in which a three leaved cam roller is used.
My said invention may be modified in various ways without departing from its
essential feature; for example-The number of leaves in the cam roller is
immaterial and Figure 4 shows a cam roller with four leaves.
Fig. 5 is a front view of the whole buckle. Fig. 6 is a front view of the catch
plate showing the positions of the pivots o o. Fig. 7 is a front view of the
bent plate spring f which bears continually against the bottom portion of the catch
plate a. Instead of such a spring a bent steel wire spring may be used as in
Fig. 8. In this example one end of the spring is held in a clawlike bend in the
back of the buckle frame while the other end takes into a similar clawlike bend in
the catch plate.
The mode of using such a buckle is very simple as only very slight pressure on
the bottom portion of the catch plate is needed in order to release the belt. while
the automatic grip of the buckle on the strap takes place immediately on the
release of the catch plate and the end of the strap. This is of considerable
advantage for braces body belts and the like since inasmuch as the belt or strap
is pressed in its entire width on the edge of the catch plate (which may be
sharpened) a really safe hold is secured which may be increased by so shaping the
leaves of the cam roller that they curl over the edge of the catch plate as shown
in the drawings.
The wear of the belt is very little as it is not damaged by points, hooks or pins
as in many other buckles.

page_text: 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,
1. A clamp buckle for straps and the like wherein the pull of the strap causes
a pivoted cam roller such as to turn and grip the strap between one of its leaves
and the edge of a pivoted catch plate such as 6 the upper portion of which bears
against a stop in the buckle framing substantially as herein before described and
shown.
2. A clamp buckle for straps belts and the like wherein the pull of the strap
causes it to be held between one leaf of a pivoted cam roller, such as and the edge
of a pivoted catch plate such as bearing against a fixed support, substantially as
hereinbefore described and shown.
Dated this 12th day of August 1892.
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicant.