Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3365975 A
Publication typeGrant
Publication dateJan 30, 1968
Filing dateDec 10, 1965
Priority dateDec 10, 1965
Publication numberUS 3365975 A, US 3365975A, US-A-3365975, US3365975 A, US3365975A
InventorsHathaway Merwin L
Original AssigneeArmy Usa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Joy stick mechanism
US 3365975 A
Images(2)
Previous page
Next page
Description  (OCR text may contain errors)

Jan. 30, 1968 M. HATHAWAY JOY STICK MECHANISM 2 Sheets-Sheet 1 Filed Dec. 10, 1965 Merwin L. Hathaway,

INVENTOR.

Jan. 30, 1968 M. HATHAWAY JOY STICK MECHANISM 2 Sheets-Sheet 2 Filed Dec. 10, 1965 Merwin L. Hathaway,

VENTOR United States Patent 3,365,975 JOY STICK MECHANISM Merwin L. Hathaway, Lexington, Mass, assignor, by mesne assignments, to the United Statesof America as represented by the Secretary of the Army Filed Dec. 10, 1965, Ser. No. 513,128 4 Claims. (Cl. 74-471) This invention relates to a joy stick mechanism that has .a universally mounted joy stick with electrical means connected to the mounting means for the joy stick so as to express an instantaneous position of the joy stick in X and Y electrical coordinates.

In a radar system, the need for a device which is capable of directing movement of a display hook or pip on the face of a plan position indicator and for blanking out the display hook or pip when desired has arisen.

Therefore, it is an object of this invention to provide a joy stick mechanism for performing the functions set forth above.

Another object of this invention is to provide a friction braking means for uniformly resisting movement of a joy stick in any direction.

A further object of this invention is to provide a connection between the joy stick and Y axis shaft that prevents backlash.

A still further object of this invention is to provide a joy stick mechanism that is simple in design without sacrifice of rigidity and that has few parts that may be made small in size and from light weight materials.

In accordance with this invention, a joy stick mechanism is provided that has a housing with a joy stick so pivoted therein as to be capable of generating a cone of varying magnitude and with electrical means so connected to the pivotal mounting means for the joy stick as to be capable of expressing any instantaneous position of the joy stick in X and Y electrical coordinates.

In the accompanying drawing forming a part of this specification, and in which like numerals are employed to designate corresponding parts throughout the same:

FIGURE 1 is a perspective view of a joy stick mechanism according to this invention;

FIGURE 2 is a perspective view looking from the bottom of the joy stick mechanism of FIG. 1, with the top and bottom covers removed;

FIGURE 3 is a perspective view looking from the top of the joy stick mechanism of FIG. 1 with the top and bottom covers removed; and

FIGURE 4 is a sectional view taken on line 4-4 of FIG. 2 with the top and bottom covers thereon and showing the joy stick in a vertical position.

The invention may be better understood by referring to FIGURE 1 wherein, numeral 1 designates a housing that has a top cover 3 secured thereto by screws 5 and a bottom cover 7 secured thereto by screws (not shown). A joy stick projects through opening 11 (see FIG. 4) in top cover 3, and a boot 13 is connected at one end to upwardly projecting handle portion 14 (see FIG. 4) of the joy stick and at the other end to flange means on cover 3 to seal opening 11 from foreign material and debris.

Variable resistors 15 and 17 (see FIG. 1) have suitable electrical lead connecting means 19 and are mounted by clamps 21 on two perpendicular sides of housing 1. Variable resistor 15 has a shaft 23 (see FIG. 2) that extends through the housing wall to the interior of the housing, and gear 25 is secured to shaft 23 for turning movement of shaft 23 to adjust variable resistor 15.

Variable resistor 17 has a shaft 27 that extends through the housing wall to the interior of the housing, and gear 29 is secured to shaft 27 for turning movement of shaft 27 and adjustment of variable resistor 17.

3,355,975 Patented Jan. 30, 1968 "ice An X axis shaft 31 is pivotably mounted in housing 1 by bearings 33, 35, and split rings 37, 39 (see FIG. 4). Segmented gear 41 is secured to shaft 31 by set screw 43 and is in meshing engagement with gear 25 to adjust variable resistor 15 in accordance with rotation of shaft 31. A Y axis shaft 45 is pivota-bly mounted in housing 1 by bearings and split rings like those for shaft 31. Segmented gear 47 is secured to shaft 45 near one end thereof by set screw 49. Segmented gear 47 meshes with gear 29 to adjust variable resistor 17 in accordance with rotation of shaft 45.

Shaft 31 is located on an axis that intersects and is perpendicular to the axis of shaft 45. A third shaft 51 is pivotably mounted at a center position of shaft 31 on bearings that are similar to those for shafts 31 and 45. Third shaft 51 has an axis that intersects and is perpendicular to the axis of shaft 31, and is co-axially alignable with the axis of shaft 45. The joy stick is connected in a conventional manner to shaft 51 to define upwardly projecting handle portion 14 and downwardly projecting actuator portion 57. Actuator portion 57 has ball type bearings 59, 61 (see FIG. 4) mounted in tandem thereon for contacting rails 63, 65 on opposite sides of slot 67. Slot 67 is formed in yoke 69 of Y axis shaft 45. Slot 67 is so shaped that the center of the slot describes an arc of a circle which has its center at pivot point 71 (see FIG. 4) of the joy stick. By providing yoke 69 with rails 63, 65 and the joy stick with bearings 59, 61, backlash between the joy stick and Y axis shaft 45 is prevented.

A friction brake body 73 is mounted on the lower end of actuator portion 57 by set screws 75 (see FIG. 2). A bore 77 in body 73 receives spring '79 and shoe or plunger 81 which is preferably made of plastic such as Teflon. Spring 79 biases plunger 81 outwardly of body 73 and into frictional engagement with spherical surface 83 on bottom cover 7 to uniformly resist movement of the joy stick.

A micro switch 85 (see FIG. 2) is secured to body 73 by screws 87, and a spring biased actuator arrangement 89 (see FIG. 4) in the joy stick and push button 91 on the end of the joy stick are used to actuate micro switch 85. Cable 93 (see FIG. 2) has leads that are connected at one end internally of the micro switch, and the other end of each of the leads is connected through an electrical connector 95 to the exterior of the housing.

In operation, the joy stick handle portion 14 is moved manually to the position desired to adjust variable resistors 15, 17 to provide signals for causing a pip or hook to be positioned in accordance with the position of the joy stick on a plan position indicator (not shown). The output resistance of variable resistors 15, 17 is directly proportional to the degrees rotation of its respective X or Y shaft. Once the pip or hook has been placed on the plan position indicator and used as desired, actuation of micro switch 85 by depressing push button 91 causes a circuit (not shown) controlled through electrical connector 95 to be controlled and thereby cause said pip or hook to be blanked out.

It is to be understood that the form of my invention, herewith shown and described, is to be taken as a preferred example of the same, and that various changes in the size, shape, and arrangement of parts may be resorted to without departing from the spirit of my invention, or the scope of the subjoined claims.

I claim:

1. A joy stick mechanism including: a housing; first and second shafts rotatably mounted in said housing on intersecting axes and perpendicular to each other; a short shaft rotatably mounted in a portion of said first shaft and on an axis that is alignable co-axially with the axis of said second shaft; said second shaft having opposite end portions that are interconnected by a yoke member that has 9 a a slot therein, said slot being formed with two semicircular rails on opposite sides of the slot, facing in opposite directions toward each other and spaced apart in a radial direction so that the rails do not overlap; a joy stick connected to a central portion of said short shaft, said joy stick having a portion on one side projecting through said slot and a second portion on an opposite side projecting outwardly of said housing to form an actuating handle portion; and two rotatable bearings mounted in tandem on said one side portion of said joy stick with one of said bearings contacting one of said rails and the other of said bearings contacting the other of said rails to provide a close tolerance fit between said one side portion of said joy stick and said rails to prevent backlash between the joy stick and said second shaft.

2. A joy stick mechanism as set forth in claim 1, wherein variable resistors are mounted on said housing, gear means are mounted on each of said first and second shafts with one of said gear means meshing with a first gear connected to one of said variable resistors, and the other of said gear means meshing with a second gear connected to the other of said variable resistors.

3. A joy stick mechanism as set forth in claim 1, Wherein said portion on one side of said joy stick has a microswitch mounted thereon, actuator means mounted in the joy stick and extending out opposite ends thereof for actuating said micro-switch, and leads connected to said micro-switch and to electrical terminals mounted in the side of said housing.

4. A joy stick mechanism as set forth in claim 1 wherein friction brake means is provided for uniformly resisting movement of said joy stick, said friction brake means ineluding a spherical surface on a cover at one end of said housing, means slidably mounting a friction pin on said one side portion of said joy stick and a spring biasing said friction pin into frictional engagement with said spherical surface; wherein variable resistors are mounted on said housing, and gear means are mounted on each of said first and second shafts with one of said gear means meshing with a first gear connected for actuating one of said variable resistors, and the other of said gear means meshing with a second gear connected for actuating the other of said variable resistors; and wherein a second cover is mounted on said housing opposite said first recited cover and a boot sealing between said joy stick and an opening through said second cover.

References Cited UNITED STATES PATENTS 2,379,778 7/1945 Allen 74-471 X 2,762,234 9/1956 Dodd 74-471 X 2,939,332 6/ 1960 Peterson 74-471 X 3,095,754 7/1963 Mayon et al 74-471 3,299,731 1/ 1967 Russell 74471 FRED C. MATTERN, JR., Primary Examiner.

C. F. GREEN, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2379778 *May 1, 1941Jul 3, 1945 Fire director
US2762234 *Sep 8, 1952Sep 11, 1956Dodd Roy FrankSearch-track radar control
US2939332 *May 31, 1955Jun 7, 1960Rca CorpMechanical movement
US3095754 *Jun 30, 1960Jul 2, 1963Burroughs CorpControl apparatus
US3299731 *Apr 7, 1964Jan 24, 1967Gen Precision IncGimbal-type joystick
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3496786 *Feb 1, 1968Feb 24, 1970Kern & Co AgControl device
US3701288 *Aug 10, 1970Oct 31, 1972Fairchild IndustriesControl apparatus having a finger operated dual motion control device
US3711811 *Dec 15, 1971Jan 16, 1973Matsushita Electric Ind Co LtdDevice for simultaneously controlling rotary shafts of a plurality of variable resistors
US3745966 *Nov 26, 1971Jul 17, 1973Gen ElectricFour-quadrant indicator employing moire effect
US3760320 *Mar 21, 1972Sep 18, 1973Matsushita Electric Ind Co LtdDevice for simultaneously controlling a plurality of variable resistors
US3870161 *Feb 28, 1973Mar 11, 1975Heede International IncJoy stick controller for tower crane
US3893449 *Dec 21, 1973Jul 8, 1975NasaReference apparatus for medical ultrasonic transducer
US4085301 *Sep 16, 1976Apr 18, 1978Fairchild Camera And Instrument CorporationHand-held controller device
US4127841 *Jul 28, 1977Nov 28, 1978Toshiba Kikai Kabushiki KaishaMulti-direction controlling mechanism
US4156130 *Sep 26, 1977May 22, 1979Tele Industries, Inc.Joystick mechanism
US4375631 *Apr 9, 1981Mar 1, 1983Ampex CorporationJoystick control
US4414438 *Jun 4, 1982Nov 8, 1983International Jensen IncorporatedVideo game controller
US4489304 *Jul 22, 1983Dec 18, 1984Hayes Charles LSpring disconnect mechanism for self centering multiple axis analog control stick
US4584577 *Oct 17, 1983Apr 22, 1986Brookes & Gatehouse LimitedAngular position sensor
US4660828 *Dec 14, 1983Apr 28, 1987Allen SchwabReactive control apparatus
US4704915 *Feb 25, 1986Nov 10, 1987Deere & CompanyValve control lockout
US4841800 *Mar 9, 1987Jun 27, 1989Ampex CorporationAdjustable control lever
US5857492 *Mar 20, 1998Jan 12, 1999Husco International, Inc.Electromagnetic friction lock for a dual axis control devices
US6536298 *Jun 30, 2000Mar 25, 2003Caterpillar IncModular joystick
US7493981 *May 5, 2003Feb 24, 2009Robert Bosch GmbhMethod and arrangement for the speed control of a motor vehicle and operator-controlled element
US8033197Oct 15, 2007Oct 11, 2011Honeywell International Inc.Fully floating, self-aligning, self-adjusting gimbal assembly for an active human machine interface
US8033704Dec 11, 2006Oct 11, 2011Optim, Inc.Compact, high efficiency, high power solid state light source using a solid state light-emitting device
US8152715Sep 14, 2007Apr 10, 2012Optim, IncorporatedEndoscope with internal light source and power supply
US8556628 *Aug 15, 2006Oct 15, 2013Malcom E. BaxterShooting training device
WO2008064117A2 *Nov 16, 2007May 29, 2008Honeywell Int IncFully floating, self -aligning, self-adjusting gimbal assembly for an active human-machine interface
Classifications
U.S. Classification74/471.00R, 200/6.00A, 74/519, 338/128, 74/471.0XY, 74/523
International ClassificationH01C10/00, G05G9/047, H01C10/14, G05G9/00
Cooperative ClassificationG05G9/04785, H01C10/14, G05G2009/04748, G05G2009/04718
European ClassificationH01C10/14, G05G9/047S