|Publication number||US3645528 A|
|Publication date||Feb 29, 1972|
|Filing date||Feb 14, 1969|
|Priority date||Jul 23, 1965|
|Publication number||US 3645528 A, US 3645528A, US-A-3645528, US3645528 A, US3645528A|
|Inventors||Cornell William D|
|Original Assignee||Brunswick Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Non-Patent Citations (1), Referenced by (8), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Cornell Feb. 29, 1972  BOWLING BALL INCLUDING TUNED 3,447,804 6/1969 Cornell ..273/54 R LOADING CIRCUIT 746,576 12/1903 Rice 273/63 E 2,774,060 12/1956 Thompson .324/41 X  Inv nt r: William Cornell, Grand Haven. Mi h- 3,068,007 12/1962 Satchell 273/63 0 3,202,742 8/1965 Bachelder et al. ..273/63 0  Assgnee' 3,351,347 11/1967 Smith et al. ..273/58 0 x  Filed: Feb. 14, 1969 OTHER PUBLICATIONS  Appl. No.: 799,392
Radio-Electronics," June, 1956, page 79. Related US. Application Data Primary Examiner-George J. Marlo  a 3 50: f Sen No. 474,442 July 1965 Attorney-Hofgren, Wegner, Allen, Stellman & McCord 52 us. c1. ..273/63 11, 340/280, 340/258 R,  if ABSTRACT 340/323, 325/66, 343/65 R A loading circuit tuned to an identifying frequency is molded  Int. Cl. ....A63b 37/00 Wi hin a plastic housing. The housing is threaded into a cavity  Field of Search 273/63, 54, 58, 213; 325 /66, located in a fingerhole of a bowling ball. The circuit includes a 325/310; 46/45, 232, 233, 234, 235; 324/41 resistor, a capacitor and an inductance coil connected in series.  References cued 6 Claims, 8 Drawing Figures UNITED STATES PATENTS L 3,0 89,702 5/1963 MacDonald 273/63 A BOWL //VG BALL Patented Feb. 29, 1972 3,645,528
' 4 Sheets-Shoot 1 INVENTOR WILLIAM D; CORNELL Patented Feb; 29, 1972 3,645,528
4 Sheets-Shoot 3 SWL R87 9" R88 SWR Patented Feb. 29, 1972 3,645,528
4 Sheets-Shoot. 4.
E G H E- H- E BOWLING BALL INGLUDING TUNED LOADING CIRCUIT CROSS-REFERENCE This application is a division of my copending application No. 474,442, filed July 23, 1965 now U.S. Pat. No. 3,447,804.
This invention relates to systems for detecting bowling balls and for differentiating between bowling balls during their use on a bowling lane of a bowling establishment. The invention more particularly relates to systems for identifying and differentiating between bowling balls for controlling equipment associated with the bowling lane for purposes of scoring, ball handling, or the like, during a game of bowling.
During a game of bowling, it is often desirable to identify balls bowled on a particular lane. Assuming, as is the general practice, that each bowler of a plurality, e.g., a team, bowls with his same ball throughout a game, the identity of the bowler can be established by detecting and identifying the bowlerls ball. Such ball identification, e.g., when coupled with identification of the lane on which the bowler has bowled, can be used for such purposes as directing return of a ball to a particular location or attributing the correct score to a particular bowler. I
With recent trends toward development of systems for automatic scoring of bowling games, it becomes important to provide an information input for a scoring system which will identify the bowler and the lane upon which he has bowled. The information should be provided in a form usable by the scoring system and should also be provided in a manner which eliminates the possibility of error in bowler and lane identity as they correlate with bowling scores computed by the scoring system. It is highly advantageous to provide the information as a result of normal bowling during a bowling game without requiring manual input of the information to the scoring system.
It is an object of this invention to provide for the identification of bowling balls in a new and useful manner during a game of bowling.
It is a further object to provide a new and useful system for coding a plurality of bowling balls with individual code means where there are differences in the code means from ball to ball sufficient for detection and differentiation of each of the balls used during the game.
More particularly, it is an object to provide signal means within a bowling ball for producing a separate signal for the particular bowling ball, and to provide a plurality of such balls in which the separate signals are discernible.
It is also an object to provide a system of the type described wherein each signal is produced by changing an externally generated signal.
Yet another object of this invention is to provide coding means which may be removably carried by each of a plurality of balls and which are interchangeable between the balls, each coding means being distinguishable from each other.
A still further object is to provide coding means such as that set forth in the preceding paragraph, which coding means comprise an electrical loading circuit.
Other objects and advantageous features of the present invention will be apparent to those in the art from the following description and from the drawings, in which:
FIG. I is a perspective view of a portion of a pair of adjacent lanes at a bowling establishment, indicating location of components of a system in accordance with the principles of the present invention;
FIG. 2 is a schematic showing of a system as illustrated in FIG. 1, in more simplified form, for clarity of understanding;
FIG. 3 is a section along line 3-3 of FIG. 2;
FIG. 4 is a section along line 4-4 of FIG. 1, showing mounting of loop members illustrated in FIG. 2 and also illustrating a bowling ball, adapted in accordance herewith, disposed within a loop and shown partially cutaway for better illustration of internal ball structure;
FIG. 4A is an enlargement of the cutaway section of FIG. 4, and
FIGS. 5 through 7 are wiring diagrams of the electrical circuitry of the illustrated form of ball detection system.
While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail a specific embodiment of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated.
It is to be understood that the ball detection system of the present invention is capable of use in combination with a bowling lane or a pair of adjacent bowling lanes in a bowling establishment. Each lane may advantageously be equipped with automatic pinsetting devices of the type commercially available and well known to those in the art. In such a bowling lane, the ball is normally bowled by the bowler from the bowlers end of the lane over a lane surface, indicated by reference numeral 12, toward a pit area, indicated generally at 13. Although the bowlers end of the lane is not shown, such structure normally identified with a bowlers end may be used in accordance herewith.
As the ball progresses over surface 12 toward the pit 13, it encounters the pin setup on surface 12, normally in the area between kickbacks I4 separating each lane setup and pit from the next adjacent lane setup and pit. The pinsetting equipment receives the ball from the pit 13 and elevates the ball above kickbacks 14, the pinsetter elevator discharge being shown at 15. Balls 813-1 and 88-2 are shown at respective ball discharges 15 in FIG. 1. The ball then proceeds over guide or branch tracks 16 or 17, depending upon the pit from which the ball was elevated. The guide tracks join at a Y-junction with a common ball return track 18 which extends to the bowlers end of the lane for return of balls to the bowlers. In the system shown, one common track 18, mounted above adjacent kickbacks I4, is provided for each of the two adjacent bowling lanes. Thus, the ball detecting system which will be described in accordance herewith will be a ball detecting system useful for two adjacent lanes. It will be apparent from the description herein that the principles of the system can be readily adapted for one lane or for a plurality of lanes greater than two.
Referring now to FIGS. 1-3, and especially FIGS. 2 and 3, a plurality of separate loops L, i.e., L-l through L-I2, are mounted to surround the ball path over a nonmagnetic portion 18a of the common ball track I8. A blocking system is provided for blocking a ball from one of the branch or guide tracks in such cases where a ball from the other branch or guide track is approaching the common track 18, so that the first ball to enter the array of loops L will progress completely through the array prior to entry of a second ball from the other branch or guide track.
The blocking system is of the type providing a right-of-way on one branch track while blocking possible interfering balls on the other branch track. The system includes an elongate shaft 22 pivotally mounted by suitable means 23 supported from suitable framework 20. The shaft 22 extends along portions of both branch tracks I6 and 17. A rail member 24 is secured by a pair of arms to shaft 22 for pivoting with shaft 22. Rail member 24 is disposed between the rails of track 16 to be depressed by a ball passing over track l6, thereby pivoting shaft 22 and rail 24 from the phanton position of FIG. 3 to the full line position, in a counterclockwise direction. Rail 24 has an inclined portion 24a for camming the rail 24 downward as the ball rolls over track 16.
Mounted at the other end of shaft 22 for pivoting therewith is a latch member 25 having a latching end 26. Latch member 25 is normally biased in a clockwise direction by a torsion spring 27 around shaft 22 secured at its ends to latch member 25 and suitable framework 20. Shaft 22, secured to latch member 25, is thereby also biased in a clockwise direction as viewed in FIG. 3, carrying rail 24 to the phantom position. The
weight of a ball, e.g., ball 83-3, is sufficient to overcome spring 27 and pivot latch downward.
A blocking member 32 is disposed between the rails of track 17 and comprises a pair of spaced arms, held in spaced disposition at one end by a pin 34 and at the other end by a shaft, on which a roller 33 is rotatably mounted. The arms are pivotally mounted by means of a shaft impaling the arms between roller 33 and pin 34 and appropriately mounted by brackets 36, supported by framework 20. The lower end of blocking member 32 is weighted to normally hang down.
As best seen in HO. 3, with latch 25 biased by spring 27 to its normally raised position, shown in phantom, as a ball, e.g., BB-4, rolls over return track 17, ball BB-4 engages roller 33 and pivots the blocking member 32 in a clockwise direction, under the weight of the ball. The ball thereupon proceeds over track 17 to track 18.
However, if a ball, e.g., BB-3, has moved onto rail 24 prior to ball BB-4 reaching latching roller 33, real 24 has been depressed against the urging of spring 27, pivoting latching member 25 downward with latching end 26 hooking over pin 34 of blocking member 32. In such instance, as ball BB-4 approaches roller 33, blocking member 32 is held by latch 25 against pivoting and ball 88-4 is stopped against roller 33. As the ball 88-3 on rail 24 proceeds beyond rail 24 and onto common track 18, rail 24 is released and latch 25 is raised by spring 27, thereby unlatching blocking member 32. The weight of ball 38-4, with ball BB-4 resting on an inclined portion of track 17, is sufficient to pivot blocking member 32 in a clockwise direction as viewed in FIG. 3 and ball BB-4 thereupon proceeds over branch track 17 and onto common track 18.
Whenever a ball on track 17 passes and pivot blocking member 32 down while latch 25 is released, pin 34 on blocking member 32 is carried beneath an extension 25:: of latch 25 to block latch 25 from being depressed. This holds rail 24 raised and blocks any ball on track 16 entering rail 24 so that the ball from track 17 proceeds completely through loops L-l through L-l2 prior to arrival of the ball from track 16 to the first of loops of L-l through L-l2. Thus, in the ball blocking system illustrated, the first ball to arrive at a particular point has the right-of-way over a ball on the other track and delays the other ball enough to pass completely through loops L-l through L-12 prior to entry of the other ball into the loops.
It will be noted in F108. 2 and 3 that, as the balls on tracks 16 and 17 approach track 18, they pass over switches SWL and SWR respectively. Switches SWL and SWR are normally open switches which are momentarily closed by passage of a ball thereover, the ball engaging an upstanding actuator arm for closing the switch. Each of switches SWL and SWR is spring-loaded so that after passage of the ball the switch reopens. The ball then proceeds onto track 18 and rolls over nonmagnetic portion 18a while rolling through the loops L-l through L-l2.
The loops L-l through L-12 comprise a portion of the ball detection system provided in accordance herewith. Each ofthe loops L is individually mounted as illustrated in FIG. 4. Each loop includes a central, electrically conductive stiff wire 37 encased in an electrically insulating sheath 38, of phenolic resin coating or the like. The loops are mounted by electrically nonconductive or insulating bolts 42 to a rib 43 on the bottom of the nonconducting and nonmagnetic track section 18a. Each loop L is disposed to surround the ball path so that the ball passes through the loop during its return over track section 180. Each loop also includes a pair of lead terminals in the form of electrically conductive screws 44 which are threadedly connected with the wire portion 37. The sheath 38 is scraped away to provide a conductive surface of wire portion 37 opposite the head of screw 44. The wire portion 37 of each loop may be generally flat to provide good rigidity and better bearing surface for attaching lead wires between wire 37 and screw 44.
As the ball leaves the last of loops L, i.e., L-l2, the ball trips switch SWT, a normally closed double pole switch which is spring-loaded toward closed position and is momentarily opened by engagement of an upstanding actuator arm with a ball passing thereover.
In general, the switches SWL and SWR function as lane identification switches for identifying the left and right lanes respectively. Signals from momentary closure of the switches are fed to a holding system where the lane identification is memorized, as will be seen. As the ball passes through the loops L-1 through L-12, its identification is established and a signal can then be given for identifying both the lane and ball. Tripping of switch SWT cancels the lane identification signal from the lane identification holding system.
As one feature of the present invention, there is provided a coding means for a ball or a plurality of separate coding means for a plurality of separate balls. Each coding means is comprised of a signal system for giving a signal detectable by one of the loops L-l through L-l2. In the system shown, the signal is detected as a change in a signal generated by an oscillator 0-1 through 0-12 (only 0-1 and 0-2 being shown in FIG. 5), the change resulting from the presence of the coding means in the form of a tuned loading circuit TC carried within the bowling ball.
Referring now to FIGS. 4 and 4A and the ball BB-S illustrated therein, it is seen that the ball includes a pair of fingerholes 53 and 54 and a cavity 55 continuing from one hole for receiving a loading circuit device 56. A loading circuit portion of the device, diagrammatically shown in FIGS. 4 and 5 at TC, e.g., TC-l or TC-2, includes a resistor, an inductance coil and a capacitor in complete series circuit. The circuit components may be molded in a body of plastic material for convenient insertion. The loading circuit device 56 includes a male threaded base portion 57 supporting and carrying the loading circuit portion TC. The male threaded base portion 57 is removably received in a female threaded portion at the entry of cavity 55 below fingerhole 53. A screwdriver slot or allen head socket 59 is provided in base portion 57 to facilitate threading so that the loading circuit device can be removably secured in cavity 55.
It is to be understood that a plurality of balls such as ball BB-S described above, can be provided as a set of balls in accordance herewith. Preferably, 12 balls are provided with loading circuits T-l through T-12, the loading circuit of each of which is detectable by a respective one of the loops Ll through L-12 and attentive equipment. The 12 balls permit bowling by two teams of five bowlers each plus a pace bowler for each team, with the teams alternating between two lanes in the illustrated system. For example, the balls BB4 through BB-S, referred to hereinabove, and seven additional balls may each be provided with a loading circuit tuned to a different frequency.
Turning now to the wiring diagrams of FIGS. 5-7, it is to be understood that although less than 12 each of the tuned loading circuits TC, loops L, oscillators O, amplifiers D, relays R, relay contacts CR and signal differentiating system sections T are illustrated, the total particular system described includes 12 of each which may be referred to herein and differentiated from each other by number suffixes 1 through l2 on the respective letter designations. Further, in the system, there are 12 each of terminals E, F, G and H in the signal differentiating system T and the same number of corresponding terminals in the scoring system. It is intended that each terminal having the identical designation, including identical suffix of 1-12, is interconnected. Also, in the signal differentiating system T, it is to be understood that contacts V-l through V-l2 and V'-l through V-l2, in the scoring system are operated by relays or the like (not shown) in a computation or control section of a scoring system, and are connected by suitable wiring to the respective sections T-l through T-l2, i.e., having the same numerical suffix, as is shown for contacts for V4 and V'-] in section T-l. Contacts A, B and C in FIG. 6 are connected to contacts A, B and C respectively in H6. 7.
Referring to FIG. 5, each loading circuit TC is tuned to a frequency for cooperation with one of the oscillator circuits, including a loop L and an oscillator o in the detection system, to increase the oscillator induction coil current, The frequencies of the tuning circuits differ from each other an amount discernible by the oscillator system. Since frequency is dependent on the product of inductance and capacitance, either the inductance or capacitance or both will vary between the loading circuits TC-1 through TC-l2. Such variance in frequency by changing inductance and capacitance is in accord with the formula:
I where F is frequency in cycles per second, L is inductance in henries and C is capacitance in farads. Also the inductance coils of each of the various oscillators are tuned to frequencies at which a maximum power transfer is achieved to the proper and corresponding loading circuit so that the induction coil 61 (of which the corresponding loop L forms a portion) of only one oscillator O is loaded by each loading circuit TC.
As the ball 88-1 to BB-12 having the proper tuned loading circuit of TC-l through TC-l2 passes through the proper coil loop of L'l to L-12, the presence of the ball loading circuit causes a power transfer from the loop L to the loading circuit. Each loop L is connected into the induction system of the proper oscillator O of a series of oscillators 0-1 to 0-12 to comprise a portion of the inductance coil 61. Each oscillator is of a structure resembling a grid dip meter with the exception that a portion of coil 61 is provided in the form of external loop L and a microammeter from across terminals 62 and 63 has been eliminated. Terminals 62 and 63 are instead connected to the input of the proper amplifier D of the series of amplifiers D-l through D-12.
Each of amplifiers D-l through D-12 includes a normally conductive transistor 64 which becomes nonconductive upon application thereto of a voltage above a known level. Transistor 64 is used for completing a circuit from a direct current source 65 to the amplifier output terminals 66 and 67, which circuit is broken by transistor 66 whenever the voltage applied thereto is above the conductive voltage level of the transistor. The corresponding relay of relays R-l through R-l2 is connected across terminals 66 and 67 for energization by source 65 while transistor 64 is conductive.
Each oscillator O is set to proper frequency by placing the proper loading circuit TC in the loop L of the oscillator and adjusting the variable resistance 68 in the grid circuit to a value providing a voltage across terminals 62 and 63 above the level at which transistor 64 becomes nonconductive, so that transistor 64 is nonconductive while the proper loading circuit is present. The adjustment of resistance 68 should be such that, with the loading circuit TC removed, the voltage across terminals 62 and 63 is below the level at which transistor 64 becomes nonconductive, so that transistor 64 is conductive in the absence of loading circuit TC in loop L and nonconductive when loading circuit TC passes near or through loop L.
During ball detection, the oscillators 0-1 through 0-12 in the detection system are constantly operating with a low current in the inductance coil 61, including loop L. When the proper loading circuit TC is near or passes through the proper loop L, the loading circuit has been so tuned as to provide maximum power transfer thereto from the proper loop L. A high current flow results in the loading circuit, and the resulting load on the oscillator increases the current in the inductance coil to a high level. As a result, the voltage across resistor 68 and terminals 62 and 63 increases, rendering transistor 64 nonconductive, thereby deenergizing the relay R, resulting in making the CR contacts of the proper one of relays R-l through R-l2, thereby giving a signal identifying the ball, e.g., for ultimate use by a scoring system or a ball return control system.
The contacts CR-l through CR-12 for the respective relays are identified in FIG. 6. In the system illustrated, one contact terminal of each relay contact is connected to a common line 7211 as at N-l through N-12, and the other contact terminal is connected as at M to a separate one of input leads 73 through 84 to one of a plurality of signal differentiating systems T-l through T-12, each of which functions to change the incoming signal to an output signal which identifies not only the ball bowled but also the lane it was bowled on. The common line 72a is connected through a signal modifier system 85 which completes a circuit between any closed relay contact and the appropriate signal differentiating system section T-l through T-12 via line 72b in such a manner as to indicate to the appropriate signal differentiating system the identity of the lane on which the ball was bowled. Input information used by the signal modifier system 85 is received at contacts A, B and C from a lane memory system 86 (FIG. 7) which functions to remember the lane from which the ball is being returned until the ball is detected by one of detector loops L. The lane memory system receives an input lane identity signal from either of switches SWL or SWR, depending on the lane on which the ball has been bowled.
Turning to FIG. 7 and the lane memory system 86 illustrated therein, assuming a ball has been bowled on the right lane, the ball, during return from the pit, progresses over branch track 17 and momentarily closes switch SWR (FIGS. 2 and 7). Themomentary closing of switch SWR results in a DC voltage higher than the firing voltage being applied to neon tube NER by connecting tube NER across the higher voltage output terminals 87 and 88 of power source of supply 89. Although this circuit immediately breaks with opening of switch SWR, tube NER remains lit due to the normally applied DC voltage from the lower voltage terminals 91 and 88 of power supply 89.
The contacts X, X, and Y and Y are contacts of a magnetic reed switch of a type commercially available. The c0ntacts are normally open. In the switch illustrated, it requires a flux of at least ampere turns to close contacts Y and Y and a negative flux of at least 50 ampere turns to open the Y and Y contacts. Also, it requires a negative flux of at least l00 ampere turns to close contacts X and X and a positive of at least +50 ampere turns to open contacts X and X.
With the tube NER lit, about l25 ampere turns of flux are applied through coil 92 on magnetic reed switches X and X, thereby closing reed switches X and X while magnetic reed switches Y and Y remain open because +100 ampere turns of flux are required to pull in Y and Y by their coil 93. Closing of contacts X and X completes the circuit between contacts A and B in FIG. 6 energizing the coil of relay 94 to thereby close contacts 95 and 96 and contacts 97 and 98 to place the positive side of DC power source 99 on common line 72b and the negative side of source 99 in circuitry with line 720.
As the ball proceeds over the common return track 18 and through the loops L-l through L12 (FIGS. 2 and 5), the appropriate loop and oscillator system detects the ball with the corresponding tuned circuit in the manner described above and closes the appropriate relay contact CR (FIG. 6). Thus, because common line 72b is positive and the appropriate one of lines 73 to 84 is negative, the magnet 102 of the appropriate differentiating system T is energized through blocking diode 103 to close magnetic reed switch contacts W to give a readout signal at terminals E and F, giving the identity of the ball, depending upon which of signal differentiating system sections T-l through T-12 was actuated by the corresponding circuitry through lines 73 to 84 and relay contact CR, and further giving indication that the ball is being returned from the right lane in that right lane reed switch W is closed rather than left lane magnetic reed switch W. Blocking diode 104 blocks energization of coil 105 so reed switch W does not close.
Considering FIGS. 2 and 7, if a ball has also been bowled on the left'lane and is being returned from the left lane immediately after the right lane ball, as close as permitted by the ball blocking system, switch SWL is closed, lighting tube NEL, which is held in due to the holding voltage of the normal circuit across terminals 88 and 91 after SWL opens. If normally open switch SWT-2 has not been tripped yet by the ball from the right lane, none of the contacts X, X, Y or Y is altered and the signal modifier system 85 (FIG. 6) remains actuated in its position indication right lane ball return to the signal differentiating system T, i.e., with common line 72b connected to the positive side of the DC source. Assuming that the ball from the left lane is detected by its appropriate loop L, when the ball from the right lane opens normally closed switch SWT-l and SWT-Z momentarily, tube NER is extinguished since switch contact Y is still open. However, contact X is still closed and tube NEL is not extinguished. With tube NEL lit, a flux of about +125 ampere turns is applied through coil 93 on reed switch Y and Y closing Y and Y. The positive flux of about +125 ampere turns applied through coil 107 is sufficient to open switches X and X. Tube NEL holds in through normally closed switch SWT-l. Closing of contacts Y and Y reverses signal modifier system 85, since B and C are now closed and A and B are open, resulting in closing contacts 97 and 108 and contacts 95 and 109 (FIG. 6) to apply the negative side of power source 99 on common line 72b and the positive side of power source 99 through line 72a and any closed relay contact CR to the appropriate section T-1 through T-12 of the signal differentiating system T. This results in closing magnetic reed switch contact W through blocking diode 104 and coil 105 in the signal differentiating system section corresponding to the ball detected to signal left lane identification for the detected bowled ball at terminals G and H. Diode 103 blocks coil 102.
If the right lane ball had already tripped and opened SWT-2, tube NER would have been extinguished prior to lighting NEL and the system would function in a similar manner as previously described for the right lane ball.
Also in similar manner, subsequent balls are detected and signals, indicating the identity of the ball and the identify of the lane from which the ball is being returned, are created. Negative flux of -l25 ampere turns is applied to reed switch contacts Y and Y via coil 112 to open these contacts, if closed, each time contacts X and X are closed by negative flux from coil 92.
The system described above is capable of providing signals for indicating to a computer the identity of both bowler and lane. Accordingly, the switch contacts W and W (FIG. 6) in the signal differentiating system sections T-1 through T-12 are intended to be wired as bowler identity switches through terminals E-l through E-12, F-l through F-12, 64 through 6-12 and H-1 through H-l2 into the circuit of a scoring system, as indicated by the respective terminals on scoring system 113, to cause the scoring system to receive pinfall information from the proper bowling lane pit and to award the pinfall information which has been received to the proper bowler, e.g., after score values have been computed from the pinfall information.
In each of sections T-1 through Tl2 of the signal differentiating system, the contacts W and W are contacts of magnetic reed switches. Each reed switch is normally open and is closed responsive to a magnetic flux of 100 ampere turns or higher. A magnetic flux of at least 50 ampere turns is necessary to maintain the switch contacts closed after they have been moved to closed position. A ringlike permanent magnet 115 is provided for each switch W and W biasing the switch to 75 ampere turns, sufficient to hold the switch closed after it has been closed. The coils 102 and 105 are in phase with the respective biasing permanent magnets 115. For initially closing contacts W and W, coil 102 or 105, upon energization, supplies an additional 50 ampere turns, giving a total above the ampere turns needed for closing. After coil 102 or 105 is deenergized, magnet holds the contact closed so that the ball and lane information are thereby stored for use by the scoring system whenever the scoring system is ready to use the information. In order to reopen the switch contact, i.e., after coil 102 or 105 is deenergized, it is necessary to overcome the effect of the permanent magnet and, for this urpose, a negative flux of 100 ampere turns can be applied y a reset coil 116 or 117 by closing the respective contacts or switches V or V, illustrated as in scoring system 113. The contacts V and V may be closed, for example, by a computer portion of the scoring system after all necessary data has been assimilated, to cancel the computer input signal at contacts E and F or G and H.
The system described herein may additionally or alternatively be used for directing return of bowling balls to bowling ball storage positions in a ball rack and for releasing balls in sequence from the rack during return of a prior ball, such as that described in copending application, Ser. No. 358,759, now U.S. Pat. No. 3,501,147 entitled Bowling Ball Return Apparatus, filed by D. F. Uecker on Apr. 10, 1964, and assigned to the assignee of this application.
1. A self-identifying bowling ball comprising a ball body having a recess therein, means within said identifying body for electrically identifying said ball from other like balls in response to external electrical interrogation, said electrical identifying means comprising an electrical loading circuit including a capacitor and an inductor and being responsive only to inductive excitation at a preselected identifying frequency, and means for retaining said loading circuit within the recess in said ball body including a housing containing said loading circuit and means for retaining said housing within said recess.
2. The ball of claim 1 wherein said electrical loading circuit includes a resistor, said inductor is an inductance coil, and said capacitor, resistor and inductance coil are in a complete series circuit.
3. The ball of claim 2 wherein said electrical loading circuit is molded within said housing and wherein said housing is removably retained within said ball body.
4. A ball according to claim 3 wherein said housing includes a male threaded portion and said ball body recess includes a mating threaded female portion in which said male portion is received.
5. A bowling ball according to claim 4 wherein said ball body has at least one fingerhole therein and said female threaded portion comprises an extension of said fingerhole.
6. A coded bowling ball according to claim 5 wherein said housing is formed of a plastic material and said electrical loading circuit is molded within said plastic material.
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|U.S. Classification||473/125, 455/95, 340/323.00R, 342/44, 340/323.00B|