Year: 1885

page_text: FREDERICK HOWCROFT 11 Hart St Covent Garden WC. Seedsman do hereby
declare the nature of the said invention to be as follows:-
It consists of an improved method of regulating the spring mentioned in my
patent No 3352/84 and is effected by a small piece of metal sliding in grooves
made in the chamber holding sash roller mentioned in the same patent (3352/84),
and pressing upon the spring at any desired point.

page_text: An Improved Method for Supporting Window Sashes.
FREDERICK HOWCROFT 11 Hart St, Covent Garden London W.C Seedsman do
hereby declare the nature of my invention for AN IMPROVED METHOD FOR
SUPPORTING WINDOW SASHES and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:
The Improvement relates to side attachment for windows for the purpose of
holding the sash at any desired position and the following is a full clear & exact
description of same reference being had to the accompanying drawings in which
No 1, is a front view of my improved Sash Holder.
No 2 is a back view of same.
No 3 is a sectional view of same.
The invention consists in the combination of an inclined socket for holding a
roller a spring bearing on the lower end of the socket to allow elastic action of the
latter and an improved clamp operated from the outside and adjustable up and
down to increase or lessen the stiffness of the spring, all as hereinafter described.
My invention is as follows
A is a rectangular cast iron case set into a mortise in the jamb opposite the edge
of the sash and secured in place by screws.
C is a socket piece or way, having a pivot at the upper end which rests on
bearings of the case so as to turn easily the lower end of the socket piece having
a round or curved knuckle which rests against the back of the case.
The body of the socket is inclined upward and backward & in the same rests a
wooden or other roller B which bears against the edge of the sash when at its
lower position but is thrown away from the sash when at the highest position.
D, is the improved adjustable clamp the same consisting of a curved or other
piece of metal which works in the slots cast in the Chamber or case A and presses
against the back of the spring at any desired point.
The clamp is placed in position on the fixture before the latter is placed in its
mortise in the jamb, and when once in place it cannot be removed until the fixture
is taken off but the ends are visible and by tapping them gently with a hammer or
other tool, the clamp can be raised or lowered while the fixture is in place and
without removing it from the jamb.
The advantage in this invention consists in the combination of the pivoted
socket piece or guideway for the roller the straight spring bearing against the
bottom of the same so as to allow the guideway to spring out or in to accomodate
the roller and the clamp sliding in slots at the lower end of the casing holding the
spring and increasing or lessening its power accordingly as it is moved up & down..
A peculiar advantage results from the arrangement of the improved clamp
whereby while it allows free movement of the sash up & down yet it can be
adjusted higher or lower without removing the fixture from its fastening.

page_text: These fixtures are used on either or both sides of the sash and may be used on
both the upper or lower sashes or either as may be desired.
Having described my invention what I claim as new and desire to secure by
letters patent is-
In a sash balance the combination of a rectangular main case with a socket or
guide way pivoted at top but free at bottom a straight spring bearing against the
bottom of the socket a clamp working in slots in the lower end of the rectangular
main case and pressing against the back of the spring whereby the stiffness of the
latter may be increased or diminshed, and a roller resting on the inclined body of
the socket piece, as shown and described.