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Патент USA US3045256

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July 24, 1962
3,045,253
H. K. PRICE
SAFETY SWIMMING POOL
Filed Feb. 27, 1959
4 Sheets-Sheet 1
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Amen/2r.
//0//as A’. B'lbe
NW
Jr N
BY jjwm W1
July 24, 1962
H. K. PRICE
3,045,253
SAFETY SWIMMING POOL
Filed Feb
27 , 1959
4 Sheets-Sheet 2
July 24, 1962
H. K. PRICE
3,045,253
SAFETY SWIMMING POOL
Filed Feb. 27, 1959
4 Sheets-Sheet 3
237d
238
July 24, 1962
H. K. PRICE
3,045,253
SAFETY SWIMMING POOL
Filed Feb. 27, 1959
4 Sheets-Sheet 4
37
I
United States . Patent 0 ice
3,045,253
Patented July 24, 1962
I
2
FIGURE 9 is a fragmentary sectional detail on an en
3,045,253‘
‘ -
larged scale, showing a portion of the false bottomv with
SAFETY SWIMMING POOL
its ?exible guard strip;
Hollas K. Price, Box 701, ‘Oak ‘Hill, W. Va.
FIGURE 10 is a fragmentary sectional view, similar to
that shown in FIGURE 5 but illustrating a modi?ed ar
Filed Feb. 27, 1959, Ser. No. 796,100 >
5 Claims. (Cl. v4--172)
rangement of the invention;
This invention relates to new and useful improvements
in swimming pools, and the principal object of the inven-'
tion is to provide a safety device for such pools whereby to
safeguard occupants thereof against drowning.
The above object is attained by the provision of a false
bottom which normally rests on the bottom of the pool
'
.
'
FIGURE 11 is afragmentary plan view of the subject
shown in FIGURE 10;
FIGURE 12 is a fragmentary sectional view showing
10 another modi?ed form of the invention;
FIGURE 13 is a fragmentary sectional view, showing
still another modi?ed embodiment; and
but, inthe event of an emergency, maybe quickly and
easily raised to the top of the pool, thus bringing all the
'
FIGURES 14 and 15 are diagrammatic views showing
two different arrangements of the pneumatic or hydraulic
occupants to the surface of the water and preventing 15 cylinders and their operative connections.
drowning of any one or more of them.
An important feature of the invention resides in the
provision of power actuated means in the form of motor
driven winches and cables for raising the false bottom to the top of the pool, and also for loweringthe false bot 20
tom to the bottom of the pool where it rests in readiness
for use.
i
‘
Referring now to the accompanying drawings in detail,
more particularly to FIGURES 1-9 inclusive, the general
reference numeral 10 designates a swimming pool having
a slanting bottom 11, a relatively deep end wall 12, a
relatively shallow end wall 13‘ and a pair of side walls 14,
15, all formed from concrete, or the like, in the conven
tional manner.
_
'
Another important feature of the invention ‘resides in an
The safety device in ‘accordance with the invention com
arrangement of the invention which renders the same
prises a false bottom or net 16 which normally rests in a
especially adaptable for use in pools with a slanting bot 25 slanting position on the slanting bottom 11 of the pool
tom, that is, pools having a relatively shallow and a rela
but, by means hereinafter described, may be quickly and
tively deep' end, the false bottom normally resting in a
easily raised to a substantially horizontal position at the
slanting position on the bottom of the pool but the ar
rangement of the winch means being such that when the
top of the pool to prevent any one or more occupants of
false bottom israised to the top, it is substantially hori 30
zontal.
the pool from drowning.
The false bottom 16 consists of a frame including a set
of longitudinal members 17 and a set of transverse mem
Another important feature of the invention resides in
bers 18, this frame being covered by a ?oor 19 of suitable
the provision of means for guiding the false bottom in
foraminous material such as wire mesh, screening, or the
its movement between the lowered and raisedpositions.
like, as is best shown in FIGURE 9.v The ?oor 19 is pref
Another important feature of the invention resides in the 35 erably made in sections as indicated at 19a in FIGURE 1,
provision of a ladder which is carried by and movable
with the false bottom and extends to the top of the pool.
these sections having abutting edges overlying the frame
- members 17, 18, so thatin the event of damage to any of
. Another important feature of the invention involves the
the sections, they may be individually replaced. As indi
provision of a modi?ed embodiment wherein pneumatic
cated at 21 in FIGURE 5, the bottom 11 of the pool is
or hydraulic cylinders are employed in place of winches 40 formed with longitudinally and transversely extending
and cables for raising and lowering the false bottom.
grooves or channels to receive the frame members 17, 18
Some of the advantages of the invention reside in its ‘ ' of the false bottom, so that when the false ‘bottom is in its
simplicity of construction, in its e?icient and dependable
lowered position, the ?oor 19 rests directly on the'upper
operation, and in its adaptability for use in connection with
surface of the bottom ‘11.
.
45
swimming pools of different sizes and types.
7
The power actuated means for raising and lowering the
With the foregoing more important objects and features
false bottom 16 are in the form of motor driven winches,
in view and such other objects'and features as may be
cables and guide pulleys. As illustrated, two winch units
come apparent as this speci?cation proceeds, the invention
22, 23 are secured to the end portions of a shaft24 which
will be understood from the following description taken
is rotatably mounted in suitable bearings 25 and disposed
in conjunction with the accompanying drawings, wherein 50 transversely adjacent the deep end of the pool. The mid
like characters of reference are used to designate like ’ portion of the shaft 24 carries an additional winch mem
parts, and wherein:
ber 26. With reference to FIGURES 7 and 8, it will be
FIGURE 1 is a plan view of a swimming pool embody
noted that the winch unit 23 illustrated therein is substan
ing the safety device of the invention;
tially cone-shaped and comprises a set of winch members
' FIGURE 2 is a longitudinal sectional view thereof, 55 23a, 23b, 23c, 23d, 232 and 23]‘. The member 23a is
taken substantially inthe plane of the‘ line 2-2 in FIG
relatively large in diameter and of the same diameter as
URE 1;
,
the aforementioned winch member 26. The winch mem
FIGURE 3 is a cross-sectional view, taken substantially
bers 23b and 23c are equal in diameter but smaller than
in the plane, of the line 3-3 in FIGURE 1;
the member 23a. Similarly,’ the members 23d and 23s
7 FIGURE ,4 is a fragmentary sectional view, taken sub
are equal in diameter but smaller than the members 23b
stantially in the plane of the line 4--4 in FIGURE 1;
‘
and 23c. The member 23]‘ is smaller in diameter than
FIGURE 5 is a fragmentary sectional view on an en
the
members 23d and 23a. The winch unit 22 is the same
larged scale, taken substantially in the plane of the line
as the unit 23, with exception that an extra one of the
5'—-5 in FIGURE 1;‘
smallest members is provided, as indicated at 22g in
FIGURE 6 is a fragmentary sectional view on an en
larged scale, taken substantially in the plane of the line
6—6»in FIGURE 1;
'
‘
'
’
‘FIGURE 7 is a vfragmentary top plan view on an en
65
'
FIGURE 1.'
o
7
Several cables are windable on the respective winchv
members. Thus, a cable 27 is windable on the member
larged scale, showing. the arrangement of one of the
23a, cable 28 on the member 23b, cable 29 on the mem
winch units and guide pulleys;
ber 23c, cable 30* on the ‘member 23a‘; cable 31 on the
member 23e, and cable 32 on the member 231‘. A cor
‘
I
FIGURE 8 is a fragmentary elevational view of the
subject shown in FIGURE 7;.
t
‘ .
, responding cable arrangement is associated with the winch
3,045,253
4
a
unit 22, with exception that another cable 33 is provided
for the winch member 22g.
Referring again to the false floor or bottom 116, it will
be noted that the transverse frame members 18 thereof
project laterally beyond the side edges of the false floor
or bottom and constitute guide elements 18a- which are
slidable in recessed guideways 34 for-med in the side walls
14, 15 of the pool and extending from the bottom to the
top of the pool, as shown. As will become hereinafter
apparent, when the false bottom 16 is raised from its
sloping lowered position to its substantially horizontal
raised position, the end of the false bottom at the deep
end of the pool is raised at a faster rate than at the shal
brackets secured to the walls of the pool as exempli?ed at
45 in FIGURES 7 and 8.
Rotation of the winch shaft 24 is effected through suit
able reduction gearing 46 by a suitable motor 47 as is
best shown in FIGURES 1 and 4, and a conventional
bra-ke 48 is provided on the shaft 24 to lock the shaft
against rotation at any given point when the false bottom
is raised off the bottom of the pool. The motor 47 is re
versible, whereby the-shaft 24 may be rotated selectively
in both directions to raise or lower the false bottom 16.
Also, suitable limit switches 49 and 50 are provided ad
jacent the deep end of the pool for engagement by the
false bottom at the ‘upper and lower limits of its travel
and thereby automatically interrupt the operation of the
low end, so as to make such raising action possible. Ac
cordingly, since the false bottom is not raised uniformly 15 motor 47 when‘the false bottom reaches either its raised
or its lowered position.
I
in a straight line, the guideways 34 are slanted or in
The various cables, guide pulleys, winch units, gearing
clined somewhat as illustrated in FIGURE 2, to permit
46 and motor 47 are located in suitable troughs or pits 51
sliding of the guide elements 18a therein without binding.
formed in the concrete structure Surrounding the sides
Referring now to FIGURE 1, it will be noted that pairs
and ends of the pool, and these troughs or pits are cov
of guide pulleys 35, 36 are suitably mounted at the upper
ered by removable plates, as indicated at 52 in FIGURE
end of the guideways 34 intermediate the ends of the pool
6, so that the mechanism contained therein is not exposed.
and single guide pulleys 37 are provided at the upper
end of the guideways at the shallow end of the pool. ' Also, in order to prevent possible injury of occupants
of the pool by coming in contact with the edges of the
Moreover, two sets of three guide pulleys each are pro
vided at the upper end of the guideways at the deep end 25 false bottom 16 while it is being raised, a guard strip 53
of ?exible material is provided at the marginal edges of
of the pool, as indicated at 38. A guide pulley 39 is
the false bottom and slidably engages the side and end
provided at the deep end of the pool centrally of the
walls of the pool, as shown in FIGURE 9. The strip 53
wall 12 and a corresponding pulley 40 is provided cen
is secured in place by suitable fasteners 54.
trally of the shallow end. Additional pulleys 41, 42
It will be noted that a ladder 55 is provided, this being
are provided at the shallow end of the pool as shown, 30
carried by and movable with the false bottom 16 by
and single guide pulleys 43, 44 are provided at the lower
having its lower end secured to the bottom 16 as indicated
ends of the guideways 34, below the respective pulleys
at 56 in FIGURE 6. The ladder extends to the top of the
35, 36, as is best illustrated in FIGURES 2 and 3.
pool in the usual manner, but its upper end is provided
The cables 27 from the members 23a of the winch units
22, 23 pass over the pulleys 38 and are anchored in any 35 with downwardly projecting extensions 57 which are slid
able in tubular guides 58 mounted vertically in the ground
suitable manner to the false bottom 16 at the deep end
at one side of the pool. Thus the ladder, together with
of the pool. Similarly, _a cable 45, windable on the winch
any persons thereon, will be raised together with the false
member 26, passes over the pulley 39 and is anchored to
bottom, ‘but such a raising action will not subject the
the false bottom centrally of the ‘points of anchorage of
the cables 27, adjacent the deep end wall of the pool. 40 occupants of the ladder to injury. The guides 58 serve
to retain'the ladder in its properly oriented position while
The cables 28 and 29 of the winch members 23b and 230
facilitating
its raising and lowering. The guides are suffi
pass over the pulleys 36, the'cables 29 alsopassing over
ciently large in diameter to permit a free ?t of the ex
the pulleys 38. The cables 28, after passing downwardly
tensions 57 and thereby compensate for any variation
over the pulleys 36, are anchored to the false bottom 16,
but the cables 29 pass around the lower guide pulleys 44 45 from true vertical in the movement of the ladder during
shifting of the false bottom-between its lowered, slanting
prior to being anchored to the false bottom.
Similarly, the cables 30, 31 of the winch‘ members 23d,‘ \ position and itsraised horizontal plane.
The accompanying FIGURES 10-15 illustrate modi
23e pass over the pulleys 35, the cables 30 being anchored
?ed
embodiments of the invention wherein pneumatic or
to the false bottom and also engaging the pulleys 38,
while the cables 31 pass around the lower pulleys 43 50 hydraulic cylinders are vused for actuating the false bot
tom, in place of the aforementioned winches and cables.
prior to being anchored to the false bottom;
In these modi?ed forms, the arrangement of the pool and
The cables 32 of the winch members 23]‘ pass over the
false bottom 16 is the same as already described but, as
pulleys 37 and are anchored to the falsebottom at the
shown in. FIGURES l0 and 11, a pneumatic or hydraulic
shallow end of the pool, while the cable 33 ‘from the
60 is-mounted in each of the guideways 34, such
extra winch member 22g passes around the pulleys 42, 55 cylinder
as
for
example,
by a base plate 61. The cylinders vary
41 and 40, before being anchored to the false bottom,
in
length
with
the
di?erent guideways ‘in proportion to
centrally of the shallow end of the pool.
the varying depth of the- pool, and the piston rod 62 of
It is to be noted that the cables27, 28, 30, 32 and 33
each cylinder is provided with a yoke 63 carrying a
are windable on their respective winch members, to
pulley64. A cable 65‘ passes over this pulley and has
gether with the cable 45, in the same direction, while the 60
one end thereof anchored to the false bottom 16 as indi
cables 29 and 31 are windable on their drums or winch
catedaat 66, while its other end is suitably anchored to
members in a relatively opposite direction, so that when
the pool, as ati67. The cylinder 60, which may bev single
the shaft 24 is rotated in one direction, thecables 27, 28,
acting, has a ?uid inlet port 68 adjacent its lower end, and
30, 32, 33 and 45 are wound for the purpose of raising
it will be apparent from the foregoing that when ?uid
the false bottom to the top of the pool, while the cables 65 under pressure is admitted into the several cylinders, up
29 and 31 are unwound. A converse situation prevails
ward sliding of the piston rods 62 will cause the cables
during rotation of the shaft in the opposite direction,
65 to raise the false bottom 16 to the top of the pool.
when the false bottom is being lowered.
Since theianchors 67 at one end of: the cables 65 are
It will be understood that while in the drawings the
stationary, the stroke ‘of the piston rods needs to be only
cables have‘ been shown as being anchored to the false 70 one-half the distance between the lowered and raised posi-'
bottom only at two spaced points intermediate the ends
of the pool, anchorage at more than two such points may
be provided by simply increasing the number of cables
and winch members, as desired.
In any event, the
various guide pulleys are rotatably journalled in suitable 75
tions of the false bottom, and suitable enclosures, indi
cated by the dotted lines 69, may be provided at the top
of the pool to receive the piston rods when they are up
wardly projected, whereby to protect persons against
coming in contact therewith. .
'
3,045,253
Suitable control valves, hereinafter again mentioned,
6
,
The accompanying FIGURE 15 illustrates a modi?ed
cylinder arrangement which eliminates the use of the sev
eral ?ow control valves 82. As such, the arrangement in
are provided to regulate the ?ow of ?uid to the cylinders
so that the piston rods of the cylinders at the deep end
of the pool travel faster than those at the shallow end,
this ?gure employs cylinders 9% which are of different
to effect faster raising of the false bottom at the deep end
‘diameters, so that the effective area of the pistons therein
than at the shallow end and permit the false bottom to
is proportionately different and coordinated with the par
assume a horizontal ‘plane at the top of the .pool. With
ticular position of the dilferent cylinders in relation to
the cable arrangement and single-acting cylinders shown
the deep and shallow ends of the pool. Thus, cylinders
in FIGURES 10 and 11, the false bottom 16 is lowered
of a large diameter are used at the shallow end and those
by gravity to the bottom of the pool when ?uid is per 10 of a‘ small diameter at the deep end, producing relatively
mitted to be discharged from the cylinders.
slow piston rod travel at the shallow end and fast travel
FIGURE '12 illustrates another modi?ed arrangement
at the deep end, whereby to facilitate raising of the false
wherein double-acting cylinders 70 are used for selec
bottom from a slanting position at the bottom of the pool
tivelyv raising and lowering the false bottom. In this
to a horizontal position at the top, Without the use of
arrangement the piston rods 71 are connected in any suit 15 ?ow control valves for each cylinder.
able manner as at 72 to what amount to endless cables
73 which pass around upper and lower guide pulleys 74,
75 in the guideways 34 and are anchored to the false
It will be noted that unlike the cable and winch ar
rangement of FIGURES 1-9 which is primarily intended
for use with rectangular pools, the pneumatic or hydrau
bottom 16 as indicated at 76. As will be apparent, when
lic arrangements of FIGURES 10-15 may be employed
the piston rods 71 are lowered or retracted into the cyl 20 with round, kidney-shaped or other pools having non
inders 70, the false bottom will be raised, and when the
rectangular con?gurations.
rods are raised or projected from the cylinders, the bot
While in the foregoing there have been described and
tom will be lowered. The stroke of the piston rods is
shown
the preferred embodiments of the invention, vari
comparable to the distance ‘between the lowered and
ous modi?cations may become apparent 'to those skilled
raised positions of the false bottom, under which circum 25 in
the art to which the invention relates. Accordingly,
stances the length of the cylinders 701 may require their
it is not desired to limit the” invention to this disclosure
lower portions to be embedded in the ground below the
and various modi?cations may be resorted to, such as may
bottom level of the pool, as illustrated. However, this
lie within the spirit and scope of the appended claims.
arrangement does not require the piston rods to be pro
What is claimed as new is:
jected above the top of the pool, ‘so that protective en 30
1. The combination of a swimming pool having an open
closures such as shown at 69 in FIGURE 10 are not
top, a perimetric wall and a bottom, and safety appara
tus comprising a not substantially coextensive with the
The double-acting cylinders 70 have upper ‘and lower
area of said pool, said net being movably positioned in
?uid inlet ports 77, 78 which, as shown in FIGURE 14,
are connected by suitable conduits to a four-way valve 35 the pool for raising and lowering movement between‘ a
lowered position on the bottom of the pool and a raised
79 of any conventional type. This valve also communi
necessary.
.
,
cates with a ?uid reservoir 80 and with a suitable pump
position atthe top of the pool, the perimetric wall of
the pool ‘being provided at perimetrically spaced points
with vertically elongated recesses, ?uid motors positioned
81,~whereby upon appropriate actuation of the valve 79
the piston rods of the cylinders may be either retracted
or projected to correspondingly raise or lower the false 40 in said recesses, each of said ?uid motors including a sta
tionary member and a vertically reciprocable member,
bottom. The conduits leading to the ports of the indi
, vidual cylinders are provided with suitable ?ow control
means operatively connecting the vertically reciprocable
members of said ‘?uid motors to said net whereby the lat
valves 82, one for each port, whereby the rate of ?uid
ter may be raised and lowered concurrently with recipro
?ow in and out of the cylinders may ‘be accurately pre~
adjusted so that the piston rods of the several cylinders 45 cation of said reciprocable members, and means for en
ergizing said ?uid motors.
are moved at different speeds, corresponding to the posi
2. The combination as‘ de?ned in claim 1 wherein said
tion of the cylinders relative to the deep and shallow ends
stationary members of said ?uid motors comprise cylin
of the pool. It may be noted that for illustrative pur
ders ?xedly mounted in said recesses, said reciprocable
poses, FIGURE 14 shows the cylinders at only one side
of the pool and that the cylinders are duplicated at the 50 members comprising piston rods slidable in and project
ing upwardly from said cylinders, said operative con
opposite side and connected in parallel with the cylinders
shown to the valve 79.
necting means comprising cables connected at one end
thereof to said net and anchored at ‘their other end to said
The valve, pump, tank and conduit arrangement used
perimetricv wall at the top of the pool, and pulleys rotat
in connection with the cylinders 60 of FIGURES 10 and
11 is comparable to that shown in FIGURE 14, with 55 ably mounted at the upper ends of said piston rods and
engaging intermediate portions of said cables.
exception that the valve 79 is a three-way valve and only
3. The combination as de?ned in claim 1 wherein said
one conduit extends to each of the single-acting cylinders
- stationary members of said ?uid motors comp-rise cylin
used therein.
ders ?xedly mounted'in said recesses, said reciprocable
Another modi?ed embodiment of the invention is
shown in FIGURE 13 wherein double-acting cylinders 60 members comprising piston rods' slidable in and project
83 are anchored, as at 84, to the false bottom 16 for rais
ing and lowering movement therewith. The piston rods
ing upwardly from said cylinders, said operative connect
ing means comprising pairs of vertically spaced pulleys
85 of the cylinders 83 are pivoted as at 86 to suitable
blocks 87 at the bottom of the guideways 34 and ?uid
rotatably mounted in said recesses, and endless cables
of the cylinders, the false bottom will be lowered. Since
the cylinders are directly connected to the false bottom,
the use of guide pulleys and cables completely elim 7
inated in this form of the invention.
ders slidable on said piston rods, said operative connect
ing means comprising fastener elements securing said net
engaging said pairs of pulleys, each‘ cable having two
inlet ports 88, 89 are provided at the top and bottom of 65 vertical stretches movable in relatively opposite direc
tions, one stretch of each cable being secured to said net
the cylinders. Flexible hoses (not shown) are connected
and the other stretch being secured to the piston rod of
to these ports to permit raising and lowering movements
the associated ?uid motor.
of the cylinders and it, will be apparent that when ?uid
4. The combination as de?ned in claim 1 wherein said
under pressure is admitted into the top of the cylinders,
the relatively stationary piston rods 85 will cause the 70 stationary members of said v?uid motors comprise verti
cylinders to slide upwardly, thus raising the false bottom
cal piston rods ?xedly mounted at their lower end in said
16. Conversely, when ?uid is admitted into the bottom
recesses, said reciprocable members comprising cylin
to said cylinders.
'
5. The combination of a swimming pool having an open
3,12%,253
7‘
8
top‘ and a relatively deep end and a relatively shallow
energizingthe ?uid motors in the second set ‘at a- pre
end, said pool including a perimetric wall and a sloping
bottom, and safety apparatus comprising a net substan
tially coextensive with the area of the pool, said net be
determined slower speedthan the motors in the ?rst set,
whereby said net may- be substantially horizontal when
ing movably positioned in the pool for raising and lower
ing movement between a slanting lowered position on the
sloping bottom of the vpool and a raised position at the
top of the pool, the perimetric wall of the pool being pro
vided 'at the deep and shallow ends with vertically elon
gated recesses, a ?rst set of ?uid motors positioned in said 10
recesses at the deep end, a second set of ?uid motors po
sitioned in said recesses at the shallow end, each of said
?uid motors including a stationary member and a verti
cally reciprocable. member, means operatively connecting
the vertically reciprocable members of said ?uid motors 15
to said net whereby the latter may be raised and lowered
in its raised position.
v2,112,466
2,339,570
Maloon _____________ __ Mar. 29, 1938
Jackson ____________ __ Jan. 18, 1944
2,603,796
2,754,523
2,754,899
Danielsen et a1. ______ __ July 22, 1952
‘Bruckner et al _________ .._ July 17, 1956
'Karobonik et al. ______ __ July 17, 1956
2,803,835
2,812,520
2,825,910
2,958,083
Summers ____________ __ Aug. 27,
Pinckard _____________ __ Nov. 12,
Prudek _____________ __ Mar. 11,
Shook et ‘a1. __________ __ Nov. 1,
concurrently with reciprocation of said reciprocable
members, means for energizing the ?uid motors in the
?rst set at a predetermined rate of speed, and means for
’
References Cited in'the' ?le of this patent
UNITED STATES PATENTS
1957
1957
1958
1960
FOREIGN PATENTS
619,263
Germany ___________ __ Sept. '16, 1935
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