US21109A - Improvement in centrifugal guns - Google Patents

Improvement in centrifugal guns Download PDF


Publication number
US21109A US21109DA US21109A US 21109 A US21109 A US 21109A US 21109D A US21109D A US 21109DA US 21109 A US21109 A US 21109A
United States
Prior art keywords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US21109A publication Critical patent/US21109A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current




    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/40Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/406Stationarily-arranged devices for projecting balls or other bodies with rotating discs, wheels or pulleys gripping and propelling the balls or bodies by friction



" Machine Gun.

Patented Aug. 3, 1858.


0. n. ru'avna, or BOSTON, AssieNon cro HIMSELF .AND CHARLES ROBIN- son, or CAMBRIDGEPORT, MAssAcnusnrrs.


Specification forming part of Letters Patent No. 21,109, dated August 1858.

To all whom it may concern:

Be it known that I, (1.13. THAYER, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Centrifugal Gun for Throwing Projectiles; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification- Figure 1 being a vertical section of the machine in the plan, indicated by the line y y, Fig. 2; Fi 2, a horizontal sectionin the plane indicated by the line or :0, Fig.1; Fig.3, an

elevation of the machine.

Like letters designate corresponding parts in all the figures.

The principal parts of my machine for throwing projectiles by centrifugal force are a strong ring or short cylinder, A, mounted on a suitable base or support,B, and a revolving thrower, G, mounted on a shaft or spindle, G, by the rapid revolutions and consequently swiftmotion of which the required velocity is imparted to the projectiles. The ring A is arranged so as to be retained firmly and be turned freely in aposition exactlyconcentrio with thethrower O, the meth 0d of accomplishing which is clearly seen in Fig. 1. Its lower edge fits in a circular rabbet or recess in the base B, and it is held down by clips i i, attached to said base and fitting into a. circular groove, 1, in its outer periphery. In order to turn it in any direction horizontally for aiming at different points of the compass, a circular rack, 0', Fig. 1, may be secured in its lower surface, into which may gear a pinion, 8, turned by means of a winch, L. (Seen in Fig. 3.)

To give the slight vertical range required in aiming at an object, the whole machine may have a slight vertical movement; or any other convenient means may be employed.

For throwing projectiles to a great distance, wherein a high range is required, the machine may beplaced in a vertical instead of a horizontal position.

The discharging-orifice f terminates in a suitable muzzle, E, as shown in Fig. 2.

A. spiral cylindrical groove, d, is formed in the inner periphery of the ring A, being about equal to one circumference(more or less) in length, and beginning, as at 'm, Fig. 1, at a height just above and so as not to interfere with or extend into its termination n, where it leads to the orificef, which is only a continuation of the groovein a direct tangent line through the ring, as represented in Fig. 2. From its commencing point m, where it has no depth, the groove gradually deepens till at its termination n it reaches a depth equal to its entire diameter, which should be sufficient to admit the size of ball or projectile required.

Thethrower 0 may have the form ot'doublecurved arms, as shown in Fig. 2, or of a complete disk, as may be preferred. It has a cup-shaped hollow, a, in its center, above which a suitable tunnel or hopper, D, is situated torcceive the projectiles when first placed in the machine. From the central cavity, a, tubular apertures b I) extend to the ends of the arms, as shown in Fig. 2, curving forward in the direction of the motion to be given to the arms sufficiently to retard the passage of the projectiles from the center to the extremities of the arms till they gradually acquire the rapid motion of said extremities, so as not to produce any shock or concussion in the machine. These apertures terminate at the exact height of the commencing point m of the spiral groove d. Hence, when a ball or projectile reaches the ring, as soon as it is brought opposite the commencement of the groove it enters therein and is led along the groove and retained therein, at first by centrifugal force, 'till the groove becomes deep enough to permit the ball 19 to drop partially down by the end of the arm of the thrower, as seen at g on the left in Fig. 2. The space 9 between the arm and the inner periphery is not sufticient to let the ball pass; but as the projectile enters the groove it sinks gradually behind the ends of the arm till near the termination of the groove it passes entirely off of the arm, being supported and held by the groove itself, as seen on the right in Fig. 2. Thus the groove receives and unerringly conveys each projectile to the orifice f without danger of misdirection or of striking the inner edge of the orifice. A heel or projection, h, behind each aperture b b and reaching nearly or quite to the inner periphery of the ring, serves to move the projectile around and finally throw it forward at the outlet.

The balls may be placed in the machinea-t any time Without care, and even numbers may be in the machine at the same moment, only one being allowed to issue from each arm at each revolution.

The motion maybe communicated to the thrower by means of a band I, passing from the driving-wheel of a steam-engine. horsepower, or other suitable motor to a pulley, H, on the spindle G of said thrower.

It is obvious that a sufficient speed may be given to the extremities of thrower to hurl the projectiles sired velocity. Balls of any bullets to thatof many pound in this machine, the size of space g, groove d, and orifice suit the size of ball required.

the arms of the with any desize, from thatof s, may be thrown the aperture b b, fbeing made to What I claim as my invention; and desire to secure by Letters Patent, is

1. The spiral groove d, arranged substantially as specified.

2. In combination with the spiral groove d, the space g and heel h at the extremity of each arm or aperture of the thrower, arranged and operating substantially in the manner and for the purpose herein set forth.

The above specification of my improved centrifugal gun for throwing projectiles signed by me this 17th day of May, 1858.




US21109D Improvement in centrifugal guns Expired - Lifetime US21109A (en)

Publications (1)

Publication Number Publication Date
US21109A true US21109A (en) 1858-08-03



Family Applications (1)

Application Number Title Priority Date Filing Date
US21109D Expired - Lifetime US21109A (en) Improvement in centrifugal guns

Country Status (1)

Country Link
US (1) US21109A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908266A (en) * 1956-02-21 1959-10-13 Waterman Engineering Corp Pitching machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908266A (en) * 1956-02-21 1959-10-13 Waterman Engineering Corp Pitching machine

Similar Documents

Publication Publication Date Title
US3884466A (en) Game ball
US399604A (en) Target
US2905469A (en) Target device
US387411A (en) John gisbl
US3570467A (en) Bird launcher
US8979680B2 (en) Surface marking system for competitive throwing and training
US6027A (en) Rotary blacksmith s twyer
US3742643A (en) Flying device
US1552191A (en) Target-throwing apparatus
GB1213389A (en) Method and system for launching projectiles
US3176988A (en) Flying target with air screw and disc separable by projectile impact
US785644A (en) Self-rotating air-torpedo.
US396251A (en) adamson
WO2014188025A1 (en) Ball-throwing device for roulette game with detachable fastening
US4291663A (en) Ball throwing machine
US2821397A (en) Blow darts
CN107042021A (en) A kind of flying disc automatic launcher
US735415A (en) Projectile.
US1268813A (en) Machine for mixing flour and other materials.
CN208205922U (en) Ammunition feed mechanism, gun post and robot
US3585978A (en) Centrifugally operated ball projecting device
US2362517A (en) Cartridge orientor
US1683643A (en) Playing piece
US1076002A (en) Revolving target.