close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2117896

код для вставки
May 17, 1938.
A. F. MANTz
SPRING SASH BALANCE
Filed April l, 1936
4
'2,117,896
2,117,896
Patented May 17, 1938 »
UNITED `STATES PATENT OFFICE
2,117,896
SPRING SASH BALANCE
Aloysius F. Mantz, Los Angeles, Calif;
_Application Aprill, 1936, Serial No. 72,066
6 Claims.
My invention relates to a spring sash balance,
-and the construction herein described is an im
provement on the spring sash balance covered
by the United States Letters Patent No. 1,669,990,
issued to me May 15, 1928, also Patent No.
1,898,584, issued to me February 21, 1933.
The principalv objects ef my present invention
are to generally improve ‘upon and simplify the
construction of the sash balance covered by my
10 aforesaid patents, and particularly, Patent No.
` 1,669,990, as well as other forms of similar spring
sash balances, and further, to provide a sash bal
ance that is relatively simple in construction, in
expensive of manufacture, capable of being read
ily installed and which is practically automatic
in operation and functions.
Further objects of my invention are to provide
a spring sash balance having two wire or cable
receiving drums mounted on a common axle,
Fig. 5 is a cross-section taken on the line 5-5
of Fig. 4.
`
‘
Fig. 6 is a cross-section taken on the line 6-6
of Fig. 4.
Fig. 7 is an elevational view of a sash balance 5
unit that includes two of the single units, and
which construction may be employed in connec
tion with a relatively heavy window sash.
Fig. 8 is a perspective View of a bow spring
that is utilized in my improved sash balance.
lo
Fig. 9 is a perspective view of the axle on which
the drums are mounted, and to which the inner
end of the spiral spring is connected.v
Fig. 10 is a detail vertical section of the com
bined hook and Yglider that is utilized for attach- 15
ing the wires or cables to the window sash.
Referring by numerals to the accompanying
drawing, and particularly to the construction
illustrated in Figs. 1 to 6 inclusive, which illus
with a spiral spring arranged between said axle
and one of the drums, and means arranged be
tween the axle and the other drum for transmit
ting the resistance oiïered by the spiral spring
to said other drum, in other words, utilizing the
trate a preferred embodiment of my invention, 20
yielding resistance offered by one coil spring for-
the window frame.
two independently operating wire or cable car
vrying drums.
Further objects of my invention are to provide
a spring sash balance that is entirely automatic
in action, capable of being readily adjusted so as
to regulate the tension ofthe spring in relation
to the weights of the window sash with which
the balance is associated, and further to provide
a balance that is noiseless in operation, of. strong
` and durable structureV and very effective in
service.
With the foregoing and other objects in view,
_ my invention consists in certain novel features
of construction and arrangements of parts that
40 will be hereinafter more fully described and
claimed and illustrated in the accompanying
drawing in which:
Fig. 1 is a front elevational view of a spring
`ist
_
sash balance constructed in accordance with my
invention.v
Fig. 2 is a side elevational view looking in the
direction indicated by the arrow 2 in Fig. l, with
the upper portion of the housing broken away
and in section.
Fig. 3 is a side elevational view of the spring
sash balance looking in _the direction indicated
by the arrow 3 in Fig. 1, with the upper portion
of the housing broken awayand in section.
Fig. 4 is an enlarged vertical section taken on
the line "-4 of Fig. 1.
I0 designates the front plate of the housing,
which plate is provided in its end portion with
apertures II for the reception of screws that
rigidly secure the sash balance to the stiles of
-
»5
Formed at or near the center of plate I0 is a u
circular aperture I2, and formed around said
Íaperture and projecting rearwardly therefrom,
is a short circular flange I3.
To combine with plate I0 in providing a hous- 30
ing for the operating parts of the balance, a sub
stantîally rectangular plate I4 is applied to the
rear face of plate I0, and formed integral with
said plate I4 is a circular cup-shaped housing
vI5 having a wall I6 that occupies a _plane par- 3,-,
allel with plate I0.
vPlate I4 and housing I5 are detachably con
nected to plate I0 by means of ears Ilia that pro
ject from the side edges of plate IU, and which
are bent around the adjacent edges of plate I4, 40
and to further secure these parts, ears or lips
I‘I project from the upper and lower portions of
cup I5, and said ears or lips pass through slots
I8 that are formed in plate I0 and then bend
downwardly against the face of said plate I0.
45
Projecting inwardly from the center of the
Wall I6 of cup I5 is a circular stud I9 that func
tions as a bearing for a tubular axle 26, the
opposite end of which has bearing on ñange .|3.
This tubular axle is'provided with a narrow lon- 50
gitudinally disposed slot 21, and formed in the
end of said tubular shaft that engages the ñange
I3 are short longitudinally disposed notches 28.
Positioned within the rear portion of the hous
ing formed by the cup I5 and front plate I0, is 55
2
9,117,890
a drum comprising a disc 29 with the edge of
which is formed integral a circumferential chan
A bow spring 50 is provided in its center with a
non-circular opening 5I for the reception of those
portions of the tubular axle 26 between the
notches 26, and when properly positioned on said
nel-shaped ñange 96. Disc 29 is provided with a
centrally arranged aperture 9| for the reception
of the axle 26, thereby enabling the drum corn " axle, the central portion of said bow spring bears 5
prising the disc 29 and flange 90 to rotate freely against the disc 45 of the rachet wheel, and the
on the axle, and arranged within said drum, is a ends of said spring bear against the disc 29 of the
spiral spring 92, the inner end of which termi
nates in a hook. 99 that engages in slot 21 in the
10 axle, and the outer end of this spiral spring is
drum that incloses spiral spring 92.
(See Fig. 4.)
When my improved sash balance is installed,
plate I Ii is secured to the window stile by means 10
secured in any suitable manner to ñange 90.
, of screws that pass through the apertures Il,
Secured to and adapted to wind on flange 90 is and housing I5 occupies an opening that is
a wire or cable 94 which passes downwardly from formed in the stile. The hooks 42 or other fasten
one side of the drum through an aperture 96 that ing means carried by the ends of the wires _or
15 is formed in the circular wall of the drum, thence cables 94 and 99 are connected to the lower por
forwardly and downwardly through coinciding tions of the upright side members of the window
apertures 96 that are formed through the lower - sash.
'
portions of plates I9 and I4.
'
' The‘spring tension required to counter-balance
The lower end of this.wire or cable carries a the we_ight of the window sash is obtained by in
'20 hook, or other suitable means, whereby it may be
detachably connected to one of the sashes of the
window.
serting ythe point of a screw driver, or the like, 20
in slot 49, and rotating tubular shaft 26, so as to
- wind said spring to Ythe desired degree, and dur-‘
-
Occupying the space within the housing be
tween the drum comprising disc 29 and flange 90,
ing this operation, the drum comprising disc 91
30 adapted to wind on the flange 98, and said wire
or cable extends downwardly from one side of
permitted by bow spring 90, which flexes slightly
said drum through an~ aperture 40 that is formed
through the circular wall I5 of the housing on the
opposite side from aperture 95, and said cable
35 extends from said aperture 40 downwardly
through coinciding apertures 4I that are formed
through the lower portions of plates Il! and I4.
Aperture 4| is located on the opposite side of
When the sash balance is properly installed
and the spring 32 is adjusted as just described,
and both sash are closed, the spring is partially
wound so that a certain degree of tension prevails
in said spring.
When the lower sash is raised the wire or ca
ble that is connected thereto is Wound upon its
drum, due to the unwinding of the spring 92,
and channel 99 is held against rotary movement
is a drum comprising a disc 91 with the edge of ' by'the insertion of a nail, or the like, through
which is formed integral a circumferential ñan‘ge aperture 49 and through one of the apertures 44.
98 that is channel shaped in cross-section. This During' this tensioning operation, the teeth of thedrum is mounted to rotate freely upon .thè tubu
rachet wheel ride past the teeth or lugs 49 on disc
lar axle 26. A wire or cable 99 is secured to and 91, and which movement of the rachet wheel is
the housing from aperture 96, through which
40 passes, cable 94, and the lower end of said wire or
cable 99 carries a hook 42, or other means, where
by it may be detachably secured to one of the
window sashes. Formed through plate III, prefer
ably above the central aperture I2, is a small
45 aperture 49, and formed through the disc 91 of
the drum that is positioned immediately behind
front plate I 0, is a series of apertures 44 arranged
inv a circle so that'they will coincide With aper
ture 49, as the drum is rotated. These apertures
50 are provided in order that a nail, or the like,
‘ may be inserted through aperture 49, and through
one of the apertures 44, that hold the drum in
which said apertures are formed against rotation
when the tubular shaft 26 is rotated to wind or
as the teeth of the rachet wheel-pass the teeth 49.
which is under tension and as the lower sash is 40
closed the cable connected thereto will rotate
the drum to which it is connected so as to rewind
the spring. When the upper sash is lowered the
Wire or cable connected thereto will rotate the
drum to which it is connected so as to wind up 45l
the spring and when the upper sash isl closed .
the spring under tension will act to rotate the
corresponding drum to wind thereon to the cable
that is connected to said upper sash.
When the drum comprising disc 29 and flange 50
99 is rotated anti-clockwise, the spring 92 is
,wound from the outside, due to the fact that
the outer end of said spring is connected to flange
90, and when the drum comprising disc 91 and
55 unwind spring 922 and, thereby increase or de
crease the tension thereof.
flange 98 is rotated clockwise, the spring is 55
wound from the inside, due to the fact that the
A ratchet wheel comprising a disc 45 provided
with radially disposed teeth 46 is provided with
arcuate slots 41, for the reception of those por
60 tions of the tubular shaft 26 between the notches
29, thus mounting said ratchet wheel upon the
ratchet wheel that is rotated as a result of the
engagement of the X» lugs or teeth 49 with the
tubular shaft so as to rotate therewith.
_ Formed in the center of disc 45 is a slot or non
circular opening 48 adapted to receive the point
65 of a screw driver, or like tool, that is utilized in
rotating the tubular shaft.
‘
_
teeth of said ratchet wheel imparts rotary move
ment to the latter, and as said ratchet wheel is 00
mounted on the end of the tubular shaft 26, the
latter is rotated. 'I'he inner end of spring 92 is
connected to the tubular axle 26, so that under
such conditions, the spring is wound from the
inside.
Under normal operating conditions, spring 92
Pressed rearwardly from disc 91 is a circular which is partially wound, is poised in equilibrium,
row of lugs or teeth 49 that are provided at their and functions as a counter-balance for both the
forward ends with straight faces or shoulders, ’ upper and lower sash. 'I'he tension of the spring
70 that are adapted to be engaged by the teeth 46 of under normal conditions is insumcient to move 70
the ratchet wheel, and these Ilugs or teeth 49 are either one of the sash, due to the weight there
shaped so that when the rachet wheel is rotated of, plus the frictional resistance resulting from
in one direction so as to wind spring 96, the the engagement of the stiles of the sash with
teeth 46 of said rachet wheel will slide freely over thewindow frame, the parting strips and the
75 said lugs or teeth 49.
stops. Further, a certain degree of resistance is 75
3
2,117,896
Thus it will be seen that I have provided a
developed by the. engagement of the wires or ca
bles 34 and 39 with the edges of the openings 35
and 40, and likewise the edges of the openings
36 and 4I, through which said wires or cables
spring sash balance that is relatively simple in
construction, practical and noiseless in operation,
pass.
readily installed and very effective in performing
The ratchet wheel 45 thatis mounted on the
end of the tubular axle 26 so as to rotate there
the functions for which it is intended.
with, provides a driving connection between the
inner end of the spring 32 and the drum com
prising the disc 31 and flange 38, inasmuch as the
teeth of said ratchet wheel normally engage the
teeth 49 on said drum, but at the same time, the
connection is such that the tubular axle may be
rotated to impart `the proper degree of tension tothe spring 32.
In Fig. 7 I have illustrated a two unit structure
particularly designed for use in connection with
the relatively heavy sash. In this construction,
an elongated housing 55 in which is mounted for
rotation, one above the other, two of the tubular
shafts 26, and each shaft having mounted there
on, two cable or wire-carrying drums.
The ca
bles or wires 56 from these drums, pass through
' openings 51 in the lower portion of the front
wall of the housing, and connected to the lower
ends of each pair of wires is a sash engaging hook
such as 42. Thus in the one structure, each shaft
is counter-balanced by two springs.
In Fig. 10, I have shown in vertical-section,
one of the hooks utilized for connecting the ends
of the wires or cables to the sash, and such hook
comprises a substantially L-shaped body portion'
42a and with a prong or prongs 42b projecting
upwardly from the horizontal arm of said body
portion, and which prongs are driven into the
lower rail of the window sash. Depending from
the vertical leg of the body of the hook is a curved
plate 42c, which frictionally engages the face
of the stile of the window frame, and thus the
inexpensive of manufacture, capable of being
It Will bel understood that minor changes in the
size, form and construction of the various parts
of my improved spring sash balance may be made
and substituted for those herein shown and de
scribed without departing from the spirit of my
invention, the scope of which is set forth in the
appended claims.
»
I claim as my invention:
1. In a spring sash balance, a pair of cable
15
carrying drums mounted for independent rotary
movement, a spiral spring having its outer end
connected to one of said drums and means ad
`justably connecting the inner end of said springI
with the other drum.
20
~
2. In a spring sash balance, a rotatably mount
ed shaft, a pair of cable-carrying drums mounted
for'independent rotation upon said shaft, a spiral
spring having its outer end connected to one of
said drums, and its inner end connected to said 25
shaft and means adjustably connecting said shaft
and the other one of said drums.
3. In a spring sash balance, a rotatably mount
ed shaft, a pair of cable-carrying drums mounted
for independent rotation upon said shaft, a spiral 30
spring having its outer end connected to one of
said drums, and its inner end connected to said
shaft, detents formed on the other one of said
drums and a ratchet wheel carried by said shaft.
with the teeth of said ratchet wheel in engage 35
ment with said detents.-
4. In a spring sash balance, a housing, a shaft
journaled therein, a pair of drums mounted for
independent rotary movement on said shaft, a
flexible member secured to and carried by the
hook performs the functions of both an attach
ing hook for the wire or cable,- and a glider for periphery of each drum, a spiral spring having its
outer end secured to one of said drums, and its
the sash in its vertical movement.
The wire or cable that connects the sash with - inner end secured to said shaft and a releasable
the balance passes through an aperture 42d driving connection between said shaft and the
45 formed in the upper portions of the parts 42a other one of said drums.
and 42e, and the lower end of said wire or cable
5. In a spring sash balance, a pair of cable
passes through an aperture 42e that is formed carrying drums mounted _for independent rotary
movement, a spiral spring having its outer end
in the horizontal leg of the hook.
\
In my improvedsash balanceVthe spring 32 connected to one of said drums, means adjustably
connecting the inner end of said spring with 50
50 functions as a resilient and yielding equalizer be
tween the wire or cable connections and the two the other drum and means for holding the second
sash of the window, and that said spring yielding
mentioned drum against rotation while winding
ly supports and balances the two sash in both movement is imparted to said spiral spring.
open and closed positions, and at any and all in
6. A spring sash balance adapted to be posi
_,
tioned in an opening in a window jamb. which 55
55 termediate points in their travel.
The spring pressed ratchet 45 engaging the balanceiincludes a pair of cable-carrying drums
detents 49 on one drum functions as a connec
and a spiral spring, the outer end of which spring
tion between the inner end of the spiral spring is connected to one of said drums, and the inner
that is secured to tubular shaft 26, and the drum end being adjustably connected to the other one
with which the ratchet wheel engages, and the of said drums, and which drums when positioned 60.
engagement of said ratchet wheel with the drum in the opening in the jamb, occupy positions sub
is such Vthat the latter may be held stationary stantially at right angles' to the plane occupied
while the tubular shaft carrying the ratchet is by the sash that bear against said jamb.
rotated to wind the spiral spring so as to produce
therein, the -required degree of tension.
ALoYsIus F. MAN'rz.
ì
Документ
Категория
Без категории
Просмотров
0
Размер файла
570 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа