U.S. patent number 3,872,623 [Application Number 05/454,101] was granted by the patent office on 1975-03-25 for entrance door construction for handball and racquetball courts.
Invention is credited to Charles A. Spaulding, Jr..
United States Patent |
3,872,623 |
Spaulding, Jr. |
March 25, 1975 |
Entrance door construction for handball and racquetball courts
Abstract
A special entrance door for playing courts such as handball and
racquetball courts has an easy to operate, positive latch
arrangement which does not interfere with play, and incorporates a
compartment which both conceals the court side doorknob and
provides storage space for personal items and playing gear. Access
to the compartment is provided by a small door which, when closed,
is flush with the inside surface of the entrance door. A simple
pull is mounted in the compartment door and is normally retracted
flush with its outside (court side) surface. Therefore, the ball
may be played off the door structure with the usual action due to
the absence of interfering projections, and personal items are
likewise concealed to preclude interference with play.
Inventors: |
Spaulding, Jr.; Charles A.
(Manchester, MO) |
Family
ID: |
23803311 |
Appl.
No.: |
05/454,101 |
Filed: |
March 25, 1974 |
Current U.S.
Class: |
49/169; 49/171;
472/94; 473/490; 49/62; 49/503 |
Current CPC
Class: |
E06B
7/34 (20130101); A63C 2019/085 (20130101) |
Current International
Class: |
E06B
7/00 (20060101); E06B 7/34 (20060101); E06b
007/34 () |
Field of
Search: |
;49/169,170,171,503,62,70 ;272/3 ;273/95H ;52/205 ;312/292 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Downey; Kenneth
Attorney, Agent or Firm: Chase; D. A. N.
Claims
Having thus described the invention, what is claimed as new and
desired to be secured by Letters Patent is:
1. An entrance structure for a playing court comprising:
an entrance door adapted to be received within an opening in a wall
of said court;
means for mounting said door in said opening for movement between
open and closed dispositions,
said door being provided with a storage compartment therein, and
having an inside surface facing the court when the door is
closed;
a closure member on the inside of said door normally closing said
compartment and movable to an open position permitting free access
to said compartment,
said member having an outside surface flush with said inside
surface of the door when the member is in its normal position
closing said compartment, whereby to preclude interference with the
action of a ball played off the door; and
a latch mechanism in said door having manually operable actuating
means in said compartment accessible from the court side of the
door when said member is moved to its open position, whereby the
door may be opened and closed and yet the actuating means is not
exposed from the court side.
2. The structure as claimed in claim 1, wherein is provided an
extendible and retractable pull on said closure member to assist in
moving the same between its open and closed positions, said pull
being normally retracted flush with said outside surface of the
member.
3. The structure as claimed in claim 2, wherein hinge means is
provided mounting said closure member for swinging movement between
said open and closed positions thereof.
4. The structure as claimed in claim 1, wherein said latch
mechanism has a shiftable bolt, and said actuating means is
operable to throw the bolt and is adapted to be grasped from the
court side of the door when said compartment is open.
5. The structure as claimed in claim 1, wherein light passages are
provided in said door and said closure member, in alignment when
said member is in its closed position, to permit a person on the
outside of the door to see through to the court side thereof.
6. The structure as claimed in claim 5, wherein said member is
provided with a window having a transparent element flush with said
outside surface of the member and presenting said light passage
therein.
7. In combination with a wall of a playing court having an entrance
opening therein:
an entrance door;
means mounting said door in said opening for movement between open
and closed dispositions,
said door being provided with a storage compartment therein, and
having an inside surface flush with the court side of said wall
when the door is closed;
a closure member on the inside of said door normally closing said
compartment and movable to an open position permitting free access
to said compartment,
said member having an outside surface flush with said inside
surface of the door when the member is in its normal position
closing said compartment, whereby to preclude interference with the
action of a ball played off the door; and
a latch mechanism in said door having a shiftable bolt for securing
the door to said wall when the door is closed, and having manually
operable actuating means in said compartment accessible from the
court side of the door when said member is moved to its open
position, whereby the door may be opened, closed and secured and
yet the actuating means is not exposed from the court side.
8. The combination as claimed in claim 7, wherein is provided an
extendible and retractable pull on said closure member to assist in
moving the same between its open and closed positions, said pull
being normally retracted flush with said outside surface of the
member.
9. The combination as claimed in claim 8, wherein hinge means is
provided mounting said closure member for swinging movement between
said open and closed positions thereof.
10. The combination as claimed in claim 7, wherein said actuating
means includes a knob for throwing said bolt and adapted to be
grasped from the court side of the door when said compartment is
open.
Description
This invention relates to improvements in entrance doors for use in
handball and racquetball, and similar sports where a ball may be
played off all the walls of the playing court.
Handball and racquetball are played inside on a court and, after
the serve, the ball may be played off any of the four walls of the
court as long as it strikes the front wall in its flight. Thus,
many different shots are possible using the four walls of the court
in an effort to place the ball so that the opposing player is
caught out of position. Although the ball is more likely to be
played off the front and side walls, it is sometimes played off the
back wall of the court, particularly in instances where the ball is
delivered deep in the back court.
Taking advantage of the characteristics of the game, the entrance
door for a handball-racquetball court is commonly located at the
center of the back wall in order to position the door where it is
less likely to be struck by the ball during play. However, since
this is inevitable, drop handles and similar devices have been used
heretofore as the door handle on the inside or court side of the
entrance door. This has not proven completely satisfactory,
however, since the handle may not be entirely flush and sometimes
interferes with the action of the ball. Furthermore, operation of
the door latch mechanism is made more difficult the more it is
attempted to minimize the effect of the handle by reducing its
size, and thereby also reducing the convenience with which it may
be grasped and operated to throw the bolt of the latch
mechanism.
Additionally, an accompanying problem relates to the personal items
and extra playing gear of the players. Oftentimes there is no
choice but to leave such items on the floor of the court in one of
the corners by the back wall since they present less of an
interference problem in these locations. For security, items such
as keys, wallets, purses and watches cannot be left outside the
court, so the player has no alternative and must at least carry
keys, extra balls, etc. into the court even if locker facilities
are available.
It is, therefore, the primary object of the present invention to
provide an entrance door structure for use in handball, racquetball
and similar sports which is specially constructed to eliminate the
interference in the back court discussed hereinabove.
As a corollary to the foregoing object, it is an important aim of
this invention to provide a special entrance door structure as
aforesaid which has an easy to operate, positive latch arrangement
that does not interfere with play, and which also provides a
storage compartment accessible from the court side of the entrance
door to enable the players to conceal personal items and playing
gear in order to also prevent such items from interfering with
normal play.
Another important object of this invention is to provide an
entrance door structure as aforesaid wherein the compartment in the
structure both conceals the court side doorknob of the latch
mechanism and provides the mentioned storage space, wherein access
to the compartment is provided by a small, easily operated door
which, when closed, is flush with the inside surface of the
entrance door.
Still another important object of this invention is to provide an
entrance door structure as aforesaid in which a conventional
doorknob may be employed on the court side of the door to enable a
player to easily throw the bolt of the latch mechanism, this
objective being achieved by locating the knob in the compartment
for convenient manual grasping when the compartment door is
opened.
Furthermore, it is an important object of the present invention to
eliminate the need for providing an exposed court side door handle,
and to substitute therefor a small, easily opened compartment door
through which access to a concealed main door handle or knob may be
gained.
An additional objective is to provide an entrance door construction
as aforesaid which permits viewing through the door structure from
the outside when the compartment door is closed, also without
interfering with the action of the ball when played against any
part of the inside surface.
In the drawings:
FIG. 1 is a perspective view of a handball-racquetball court
showing the entrance door structure of the present invention and
illustrating two exemplary shots, the side wall nearest the viewer
and the front wall of the court being transparent solely for
purposes of illustration;
FIG. 2 is an elevational view of the entrance door from the court
side, both the door and the small closure member of the compartment
being closed;
FIG. 3 is an elevational view of the outside of the entrance
door;
FIG. 4 is an enlarged, vertical sectional view taken along line
4--4 of FIG. 2;
FIG. 5 is a fragmentary, horizontal sectional view taken along line
5--5 of FIG. 2, on the same scale as FIG. 4;
FIG. 6 is a perspective view of a portion of the court side of the
entrance door, the closure member of the compartment being shown in
an open position; and
FIG. 7 is an enlarged, fragmentary, horizontal sectional view taken
along line 7--7 of FIG. 4.
Referring initially to FIG. 1, the handball-racquetball court 10
there illustrated has the usual front wall 12, back wall 14, and
playing floor 16 marked to designate the serving area 18. A
spectators balcony 20 is located above the rear wall 14, and the
side wall of the court 10 farthest from the viewer is seen at 22.
An entrance opening 24 is centrally located in the back wall 14,
and the entrance door 26 of the present invention is mounted
therein by recessed hinges (not shown). The door 26 would normally
be arranged to swing inwardly when opened.
Before describing the entrance door construction in detail, it is
instructive to note the two exemplary shots illustrated in FIG. 1.
The broken line 28 shows the flight of a ball hit by a player in
the vicinity of the serving area 18. The ball strikes the front
wall 12, the side wall 22, and the entrance door 26 in that order
as illustrated by the arrows. The broken line 30 shows the flight
of a ball hit deep in the back court directly against the entrance
door 26, the ball then rebounding down the court and striking the
front wall 12. Both of these shots illustrate that the back wall 14
may at times be played from various player locations. Accordingly,
the back wall 14 and its entrance door 26 should present a smooth,
virtually uninterrupted surface that will not interfere with the
action of the ball nor discourage a player from playing the ball
off the back wall as a part of the strategy of the game.
This is accomplished in the present invention as illustrated in
FIGS. 2-7. FIG. 2 shows the entrance door 26 as it appears from the
court side when closed. As will be described, the door 24 contains
a storage compartment, the door of such compartment being in the
nature of a relatively small, rectangular closure member 32 on the
inside of the door 26. All that is visible when the member 32 is in
its closed position is a retracted pull 34 and a circular,
transparent insert 36 located above the pull 34. From the outside
(FIG. 3) the entrance door 26 is seen to have an outside doorknob
38 that is disposed toward the center of the door away from the
jamb. A small eyepiece 40 is disposed in alignment with the
transparent insert 36 on the inside, as will be discussed.
The door 26 is preferably of hollow core construction with its
court side panel 42 (FIGS. 4 and 5) being selected to provide the
ball with rebound characteristics that are the same as the action
obtained when the ball is rebounded off the walls of the court. The
closure member 32 (preferably of the same or similar material) fits
in a rectangular opening 44 in the panel 42 and is mounted for
swinging movement by a pair of recessed hinges 46. The pull 34 is a
typical cabinet pull and retracts flush with the outside (court
side) surface of the closure member 32, the pull 34 being in the
nature of a vertically disposed finger that is hinged at its upper
extremity. As may be seen in FIG. 4, there is just enough clearance
at the lower end of the pull 34 to permit a fingertip to withdraw
the pull to the extended position thereof illustrated in broken
lines. Both the size of the pull 34 and the force that must be
exerted thereon to swing the member 32 to an open position are
quite small, since it is only necessary to separate the two
components 48 and 48a of a magnetic catch. The component 48 is
mounted on the inside of the member 32, and the component 48 a
(containing the permanent magnet) is installed within the door 26.
The spacing between the components 48 and 48a is adjusted to hold
the member 32 closed with the outside surface of the member exactly
flush with the inside surface of the door 26 (see FIG. 5). A
friction or spring catch may also be employed in lieu of the
magnetic catch illustrated.
When the closure member 32 is swung open as in FIG. 6, a storage
compartment 50 as mentioned above becomes accessible, along with a
latch mechanism 52 for the door 26 of which the outside doorknob is
a part. The mechanism 52 is conventional and employs an extended
bolt 54 to accommodate the spacing of the knob 38 from the adjacent
jamb. An inside doorknob 56 of the standard type opposes the
outside knob 38 but is concealed within the compartment 50.
Accordingly, as is evident in FIGS. 4-6, the arrangement prevents
the entire latch mechanism 52 from being exposed from the court
side.
FIG. 7 shows in detail a window 58 formed in the closure member 32
and including the transparent insert 36 which is flush with the
outside surface of the member 32. The insert 36 is preferably of a
transparent plastic material and does not adversely affect the
action of the ball. Referring to FIG. 4, the eyepiece 40 and the
insert 36 are aligned when member 32 is closed to provide aligned
light passages so that one outside the court may look in to
determine if the court is in use without opening the door 26.
Utilizing the door construction of the present invention, the
players store personal items and playing gear in the compartment 50
so that the court floor is entirely clear. With the door 26 and the
closure member 32 completely closed, the vertical playing surface
presented by the back wall 14 is substantially uninterrupted by the
presence of the door 26. When egress is desired, the player merely
swings the member 32 to an open position using the small pull 34,
and then reaches into the compartment 50 and grasps the doorknob
56. It will be appreciated that this is a full-size doorknob to
enable the player to easily throw the bolt 54 and permit the door
26 to be swung open in the normal manner.
It is significant in the present invention that the pull 34 used to
assist the player in opening the compartment may be reduced to a
size to preclude any material interference with the action of a
ball played off the surface of the closure member 32. Since the
member 32 is in the nature of a small cabinet door, simple magnetic
(as shown) or friction type catches suffice and these may be
readily separated by a light pull to open the compartment. The
significant mass of the door structure, therefore, is secured by a
standard door latch mechanism as illustrated at 52, and for this
purpose the concealed doorknob 56 allows the player to conveniently
throw the bolt 54 by manual rotation of the knob. In this regard,
it is important that a positive latch arrangement such as
illustrated by the bolt 54 be employed with an entrance door of
this type, since it must be securely held not only rigidly but in
exact alignment with the surrounding wall in order that the
adjacent wall and door surfaces at the edge of the entrance opening
24 will be coplanar and present no significant interruption that
could interfere with the normal rebound characteristics of the
ball.
* * * * *