A Combined Sash-fastener and Sash Balancing Apparatus.
Year: 1891

page_text: Date of Application, 21st July, 1891-Accepted, 12th Sept., 1891
COMPLETE SPECIFICATION.
A Combined Sash-fastener and Sash Balancing Apparatus.
We, PHILIP JACOB SHAEFFER, Mechanic, residing at No. 914 North Fourth
Street, in the City and County of Philadelphia and State of Pennsylvania, one of
the United States of America, and LEON LANDAUER, Gentleman, residing at
No. 505 Fairmount Avenue, in Philadelphia aforesaid, citizens of the United States
of America, 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 invention relates to sash-balances, and more especially to that class in which
the sash is balanced by a spring-controlled cog-wheel which engages with a rack
on the side of the sash.
The object of the invention is to provide a combined balance and lock whereby
one or both sashes may be raised or lowered, or locked to any desired elevation,
each sash independently of the other.
In the accompanying drawings, wherein like letters of reference point out similar
parts on each figure-
Figure 1 is an inside elevation of a window frame, partly in section, with the
upper and lower sashes partly open, having attached thereto a balance embodying
this invention.
Figure 2 is a front view of our improved device as it appears when screwed fast
to the window frame.
Figure 3 is a rear view of the same.
Figure 4 is an enlarged side perspective view of the device showing portions of
the window frame and the means of its connection thereto.
A, designates a window frame; B, B', the upper and lower sashes, respectively;
C, a rack secured vertically to one side of each sash.
Revoluble pulleys or any suitable guides may be attached to the opposite side of
the sash to prevent transverse or lateral motion. In place of pulleys there may
be beads or flanges to run within a groove in the frame casing. As we lay no
claim herein to such construction it is not shown in the drawings.
D, the base plate of the lock; E, brackets or supports for the two cog-wheels, F, F';
G, G', spring locking bolts; H, cams attached to a leaf overturned at right angles
from the base plate; and I, the springs within cog-wheels, F, F.
The base plate is rectangular in form, and provided with openings, a, a, through
which the cog-wheels, F, F¹, may project sufficiently to engage the teeth of the
rack, C.
Brackets, E, are integral with the base plate, and are upturned at right angles
therefrom and are in pairs, one pair being forward of the other, the rear one being
slightly elevated above the forward one, so that the cog-wheel to operate one sash
is extended sufficiently above the other to allow locking bolt, G', to pass clear
of the forward cog-wheel and be enabled to lock and unlock the rear cog-wheel.
Locking bolts, G, G¹, are spring actuated, as shown in Figures 3 and 4; one
bolt is short to lock and release the forward cog-wheel, the other is longer so as to
pass clear of the peripheral cogs of the front wheel and across the space, b, between
the two wheels, as plainly shown in the drawings, whereby said longer bolt is
adapted to be engaged with and be disengaged from the cogs of the rear wheel,
which, as described and illustrated, is slightly elevated above the front wheel.
Each locking bolt is provided with a thumb-piece, c, adapted to slide upon
cams, H, for the purpose of unlocking either one or both sashes independently.
We do not desire to limit ourselves to the described thumb-piece and cam at the
end of the bolt, any suitable extension on said bolt and a detent with which it will

page_text: intermesh when brought into engagement, will be within the scope and purview of
our invention.
j
To open the window at the top or bottom, the appropriate locking bolt is with-
drawn, whereby the released sash is free to move, so as to open or shut the window
when the sash is raised or lowered to the required position, the bolt head is turned
off its cam or detent; the spring, e, will force said bolt into engagement with its
cog-wheel and lock the sash securely.
Each sash is provided with a rack, but there is only one base plate with its two
spring-balanced wheels.
The axles or pivots of said wheels are not in the same horizontal_plane,
they are eccentric in reference to each other for the purpose of allowing
the locking bolt of one wheel to pass clear of the other, as hereinbefore set
forth.
Our improved sash balance may be cheaply manufactured and sold to the trade
as a new and improved article of manufacture.
In the manufactory the balances will be made to suit sashes of different heights
and weights, so as to operate sashes of any size, width or weight.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. The within-described sash balance and lock, consisting of two spring-actuated
cog-wheels, F, F¹, each enclosed within pairs of brackets, E, E, and adapted to
turn on separate journals having bearings within said brackets, said journals being
axially eccentric respectively to each other, each cog-wheel provided with a spring-
controlled bolt to be independently withdrawn outwardly to permit each cog-wheel
to revolve without interference with the other; the outer end of each bolt provided
with projection to mesh with a cam or detent whereby to stop and lock the
respective cog-wheel at any stage of its revolution, all in combination with rack
attached to the outer side of the sash, substantially as described.
2. A window sash balance of the character described, having two spring-actuated
cog-wheels located within suitable frame work of window casing both at the same
side, each cog-wheel arranged to revolve on its separate journal the axial points
of said journals being respectively eccentric to each other, whereby the peripheral
cog of one wheel will extend outwardly beyond the circumferential area of the
companion one, each wheel provided with an independent propellible bolt having
a torsion spring within the casing, and an outward thumb-piece, c, adapted to mesh
upon a cam, H, in combination with rack on the side of each section of the window
sash which will engage its controlling cog-wheel but freely move vertically with-
out intermeshing or actuating the cog-wheel adjusted to lock and release the opposite
section of sash, substantially as described.
Dated this 21st day of I»l» 1801
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.