U.S. patent number 3,681,987 [Application Number 05/065,889] was granted by the patent office on 1972-08-08 for air actuated ski speedometer.
Invention is credited to Asa P. Ruskin.
United States Patent |
3,681,987 |
Ruskin |
August 8, 1972 |
AIR ACTUATED SKI SPEEDOMETER
Abstract
A ski speedometer for registering the highest speed attained by
a skier during a predetermined ski run. The ski speedometer employs
a tube having an air inlet and a spring pressed plate actuated by
air passing into the tube. An indicator is attached to the plate
and positioned outwardly of the tube for cooperating with indicia
on the tube for providing a direct readout of the actual highest
speed attained by the skier, until the ski speedometer has been
reset.
Inventors: |
Ruskin; Asa P. (New York,
NY) |
Family
ID: |
22065822 |
Appl.
No.: |
05/065,889 |
Filed: |
August 21, 1970 |
Current U.S.
Class: |
73/861.71;
73/861.76; 73/186 |
Current CPC
Class: |
G01P
5/02 (20130101); G01P 1/08 (20130101) |
Current International
Class: |
G01P
5/02 (20060101); G01P 1/08 (20060101); G01P
1/00 (20060101); G01p 005/02 () |
Field of
Search: |
;73/228,189,186 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Woodiel; Donald O.
Claims
I claim:
1. A ski speedometer for registering the highest speed attained by
a skier during a predetermined period comprising a tube, said tube
having an open end forming an air intake, a plate disposed in said
tube, guide means on said tube, and said plate for movably mounting
said plate formotion along a constrained path within said tube,
spring means in said tube engaging said plate for resisting
move-ment of said plate, indicia on said tube, indicator means
carried by said plate and extending outwardly of said tube
cooperating with said indicia to visually indicate amount of
movement of said plate, means for retaining said plate in a
position corresponding to the furthest movement from an initial
position attained, and securing means attached to said tube for
attaching said tube to a garment of the user in an attitude for
directing air into said tube corresponding to the speed of the
user, said means for retaining including a toothed slot in said
tube, a pin on said plate, said pin extending into said slot and
being engageable with said teeth.
2. A ski speedometer according to claim 1, wherein said slot
extends longitudinally of said tube.
3. A ski speedometer according to claim 1, wherein said slot is
arcuate in shape.
4. A ski speedometer according to claim 3, wherein said slot
extends through an arc of substantially ninety degrees.
5. A ski speedometer according to claim 4, including a shaft
journalled in said tube, said plate being mounted on said shaft and
rotatable therewith, said spring means being wrapped about said
shaft.
Description
The present invention relates to a ski speedometer adapted to be
attached to a garment of a skier for providing an indication to a
skier of the highest speed which the skier has attained during a
run down a ski trail.
Skiing as a sport has become a wide spread recreational and
entertaining pursuit for enormous numbers of enthusiasts. As the
skier becomes more expert, the speed at which the skier travels
over the various ski trails and slopes increases and becomes not
only quite thrilling, but actually becomes a challenge so that more
and more speed is sought and attained. Because of this, the
knowledge of the actual speed which the skier has attained becomes
desirable to a great number of skiers.
The present invention provides an inexpensive device which may be
readily attached to a garment of the skier in a convenient manner
and which is so arranged that the air passing by the skier during
the skier's run down a ski trail will be automatically registered
and the ski speedometer is so arranged that it will indicate and
maintain an indication, until reset, of the highest speed which had
been attained during a predetermined period.
The construction of this invention features the use of a tube in
which a plate is mounted. Guide means are provided constraining the
movement of the plate when actuated by air passing into the tube
due to the skier's movement. These guide means include a toothed
slot, and a pin carried by the plate which is engageable in a
ratchet and pin type connection with the toothed slot for
maintaining the plate in its farthest advanced position when
actuated by air passing into the tube caused by the skier's
travelling over a ski slope.
In one embodiment of the invention the ski speedometer is in the
form of a longitudinally arranged tube with the guide means
including a longitudinally extending slot.
Another form of the invention includes a horn-shaped tube with the
guide means including an arcuate toothed slot.
Still further objects and features of the present invention reside
in the provision of an air actuated ski speedometer which is simple
in construction, capable of being manufactured out of readily
available materials including synthetic plastics and the like,
which may be secured to a garment of a skier by means of a safety
pin or clip, and which is inexpensive to manufacture, thereby
permitting wide use and distribution in the sport of skiing and the
like.
These, together with the various ancillary objects and features of
the present invention, which will become apparent as the following
description proceeds, are attained by this air actuated ski
speedometer, preferred embodiments of which are illustrated in the
accompanying drawing, by way of example only, wherein:
FIG. 1 is an elevational view of a ski speedometer constructed in
accordance with the concepts of the present invention, with parts
being broken away to show other parts in section;
FIG. 2 is an enlarged vertical sectional view, taken along the
plane of line 2--2 in FIG. 1;
FIG. 3 is a partial enlarged detail view illustrating the manner in
which the plate and indicator are locked in the position for
indicating the highest speed attained;
FIG. 4 is a view similar to FIG. 1 of a modified form of the
invention; and,
FIG. 5 is a partial longitudinal sectional detail view illustrating
details of construction of the embodiment of the invention shown in
FIG. 4.
With continuing reference to the accompanying drawing, wherein like
reference numerals designate similar parts throughout the various
views, and with initial attention to the embodiment as shown in
FIGS. 1 through 3, reference numeral 10 generally designates a ski
speedometer constructed in accordance with the concepts of the
present invention. The ski speedometer includes a tube 12 molded
out of any suitable synthetic plastic material, such as
polystyrene, polyvinyl chloride, or the like, and which may have a
closed end 14 and an open end 16 having a lip 18 forming the
outermost edge thereof and forming an air intake opening into which
air may be forced due to the motion of the skier.
An elongated longitudinal slot 20 is formed in the tube 12 and
extends the major portion of the length of the tube 12 and is
provided with a plurality of downwardly extending ratchet teeth 22.
The tube 12 may be molded with a thickened portion 24 to which a
safety pin 26 or like fastener, such as a clip, is attached for
detachably securing the ski speedometer to the clothing of the
user, including any suitable garment, such as a cap, the shoulder
of the ski jacket, waist band or the like, in an attitude where the
open end 16 is directed forwardly of the normal motion of the skier
so that the air passing by the skier during the skier's movement
will enter the open end 16.
Opposite the slot 20 there is provided a groove 28. A plate 30 is
disposed in the tube 12 and substantially fills the tube 12 though
the peripheral edge thereof is spaced from the inner peripheral
walls of the tube by a slight amount. The plate 30 has a projection
34 which rides in the groove 28 and carries a pin 36 which extends
through the slot 20 so that an indicator 38 attached to the pin 36,
which is curved to conform to the contours of the tube 12 and to be
closely spaced therefrom, will move with the plate and cooperate
with suitable indicia 40 on the outside of the tube 12 to indicate
the actual speed of the skier.
A spring 42 preferably in the form of a coil spring biases the
plate 30 and has its other end engaged with suitable detents 44
within the tube so as to normally urge the plate to its initial
position as shown in FIG. 1. As air enters the opening 16 due to
the speed of the skier, the spring 42 will be compressed. The slot
20 is so arranged with respect to the pin 36 that the pin 36 will
ride the toothed outer portion and will engage between the teeth in
the form of a pin and ratchet so that when the plate 30 has been
pushed in the maximum amount, the pin 36 will lock the plate 30 in
the extended position. The spring 42 will normally maintain the pin
36 resiliently in the raised locked position as shown in FIG. 3.
The spring 42 and the indicia 40 will have been so calibrated that
the indicator 38 will provide a direct readout in miles per hour or
kilometers per hour of the actual speed of the air entering into
the tube 12 and therefore a relatively accurate indication of the
speed of the skier over the ski trails is obtained.
The embodiment shown in FIGS. 4 and 5 is quite similar to the other
form of the invention. Herein a ski speedometer 110 is provided
with a tube 112 in the arcuate shape of a horn, such as a French
horn, and which is provided with an opening 116 having a lip 118.
In this instance the plate 130 is mounted on a shaft 134 journalled
in the tube 112 and carries a pin 136 which rides in an arcuate
slot 120 provided with teeth 122. A clock-type spring 142 is
wrapped about the shaft 134 and normally urges the plate 130 to an
initial position as shown in FIGS. 4 and 5. An indicator 138 is
provided on the pin 136 outwardly of the tube 112 and cooperates
with indicia 140. A guide groove 128 may be provided for
cooperation with a guide projection 135 on the plate 130. The end
of the spring not secured to the shaft 134 is secured to the tube
112 at 144.
In use, with the tube 112 attached to a garment of the skier so
that the open end 116 is facing forwardly, air will depress the
plate to a position where the pin 136 will engage the teeth 122 in
the farthest position attained to indicate relative speed through
rotation of the shaft 134 through actuation of the plate 130.
To reset, all that is necessary is to pull the pin 136 out of
engagement with the teeth and allow the spring 142 to return the
plate to its initial position much in the same manner that the pin
36 is disengaged from the teeth 22 manually and the plate 30 is
allowed to return to its initial position.
The opening in the slots 20 and 120 form an outlet for air rushing
into the opening 16 and passing past the plate 30 or 130
respectively. Of course, other suitable air outlets may be provided
as necessary or desired in the tubes 12 and 112 respectively.
A latitude of modification, substitution and change is intended in
the foregoing specification, and in some instances, some features
of the invention may be employed without a corresponding use of
other features.
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