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slug rejector (57)vending machine mechanism (37)magnet test (33)coin chute (29)coin detector (25)specific gravity test (20)sizing aperture (17)coin selector (17)coin tester (15)19th century patent (15)vending machine (15)counterfeit detector (14)counterfeit coin detector (10)vending mechanism (8)coin sorter (7)anti-slug device (7)anti-fraud device (7)coin gauge (6)1930s coin mechanism (6)sizing slot (5)balance scale (4)coin weighing device (4)letter scale (4)counterweight (4)coin-operated (4)chute (4)fraud prevention (4)slot machine mechanism (4)coin rejector (4)gold coin gauge (3)coin balance (3)19th century numismatic tool (3)19th century coin tester (3)counterfeit detection (3)balance beam (3)postal scale (3)specific gravity (3)coin-chute (3)coin-controlled mechanism (3)vending machine security (3)coin-controlled vending machine (3)mills novelty company (3)pivoted gate (3)coin-operated machine (3)slot machine (3)slug detector (3)spurious coin detector (3)coin separator (3)coin slide (3)baltimore patent (2)knife-edge pivot (2)tilting balance (2)slot gauge (2)coin sizing gauge (2)specific gravity gauge (2)strength tester (2)arcade machine (2)dial indicator (2)penny scale (2)weighing machine (2)19th century coin mechanism (2)19th century coin machine (2)pivot lever (2)ratchet and pawl (2)coin-controlled machine (2)electro-magnet (2)coin telephone (2)1896 patent (2)pivoted magnet (2)washer-catcher (2)counterfeit tester (2)bell-crank lever (2)early 1900s patent (2)anti-fraud coin device (2)fraud preventive (2)specific thickness gauge (2)weighing lever (2)coin mechanism (2)coin testing device (2)weight discrimination (2)weight gauge (2)galvanometer switch (2)electromagnetic slug rejector (2)fluctuating magnetic field (2)eddy current (2)1930s patent (2)gravity chute (2)thermocouple coin tester (2)electromagnetic gate (2)horseshoe magnet (2)solenoid actuated (2)national rejectors (2)balanced lever (1)19th century numismatic device (1)lever scale (1)fulcrum weighing device (1)gold coin tester (1)scale beam (1)19th century weighing device (1)numismatic tool (1)gauge (1)diameter scale (1)thickness incision (1)gravity coin test (1)inclined plane gauge (1)tilting spout mechanism (1)1862 patent (1)william painter invention (1)coin counter (1)gold coin detector (1)mechanical assay device (1)fulcrum lever (1)slotted gauge plate (1)pocket coin tester (1)breaking resistance test (1)specific gravity alternative (1)coin sizing device (1)cast-iron receiver (1)balance-weight (1)tipping platform (1)coin gage (1)half-dollar detector (1)pocket balance (1)knife-edge fulcrum (1)weighing disk (1)pivot mechanism (1)coin sizing lugs (1)chicago invention (1)balance-lever (1)philadelphia invention (1)numismatic device (1)coin slot gauge (1)half dollar detector (1)quarter dollar detector (1)trip-lever (1)sizing gauge tube (1)pocket device (1)money-drawer accessory (1)beam balance (1)graduated disk (1)19th century scale patent (1)akron ohio invention (1)weighted poise (1)cash receiver (1)19th century banking device (1)philadelphia patent (1)balance plate (1)concentric concavities (1)19th century patent model (1)slotted gauge (1)tapering slot (1)fulcrum rocker (1)19th century chicago patent (1)gold and silver coin gauge (1)quicksilver weighing (1)float mechanism (1)coin slot table (1)19th century coin scale (1)folding pocket scale (1)knife-edge bearing (1)19th century coin gauge (1)money scale (1)coin roller (1)balance lever (1)silver coin slot (1)muscular power gauge (1)counterweight mechanism (1)victorian amusement device (1)pull-test machine (1)height measuring machine (1)penny arcade (1)lever mechanism (1)19th century amusement device (1)novelty machine (1)coin-controlled scale (1)tripping mechanism (1)pivoted bar (1)coin receiver (1)vending machine fraud prevention (1)coin slot catch mechanism (1)spring clip coin detector (1)washer diverter (1)coin-operated apparatus (1)fake coin detection (1)coin slug detector (1)gripping-arms (1)fraud-prevention mechanism (1)stop device (1)english patent (1)kicking machine (1)friction wheel (1)dial index (1)balanced coin race (1)spiral wire mechanism (1)spring-loaded scale (1)star automatic sales company (1)coin-freed machine (1)hinged coin-slide (1)hidden camera detection (1)victorian vending mechanism (1)coin-controlled phonograph (1)edison assignee (1)slot mechanism (1)counterfeit check rejection (1)coin passage (1)1890s coin mechanism (1)washer detector (1)pivot plate (1)coin conveyer (1)specific gravity check (1)coin-controlled delivery (1)tilting tray (1)trade token mechanism (1)retail incentive device (1)19th century vending (1)detent lock (1)reciprocating slide (1)spring-actuated ejector (1)coin-controlled toy bank (1)music box mechanism (1)mechanical bank (1)spring-driven automaton (1)releasing wheel (1)forestville connecticut (1)19th century toy patent (1)coin-operated piano (1)player piano (1)electric motor (1)circuit breaker (1)perforated paper roll (1)nickel-in-the-slot (1)automatic musical instrument (1)revoluble disk (1)anti-cheating device (1)pay telephone (1)sounder (1)transmitter pivot (1)telescopic tube (1)19th century telephony (1)hartford connecticut patent (1)pocket balance scale (1)pencil holder (1)eraser holder (1)beam scale (1)combination tool (1)coin-controlled apparatus (1)spring slide (1)glass inspection window (1)chute mechanism (1)coin-actuated (1)gambling device (1)bonus wheel (1)trade stimulator (1)pivot spider (1)gravity track (1)cigar store novelty (1)coin-tester (1)coin-controlled telephone (1)toll-box (1)pay station (1)signal device (1)transmitter base (1)gray automatic telephone pay station company (1)1898 patent (1)telegraphing prevention (1)pivoted plate (1)bogus coin detector (1)coin sizing slot (1)spring-controlled cam-dog (1)coin display window (1)ejector (1)escutcheon slot (1)swinging magnet (1)push-off plate (1)coin guard (1)sounding board (1)electrolytic coin detection (1)galvanometer (1)solenoid clutch (1)cigar vendor (1)change-making mechanism (1)worm-shaft escapement (1)19th century vending patent (1)coin slot mechanism (1)balance rocker (1)1901 patent (1)coin-receiver (1)washer detection (1)slidable receiver (1)pivoted lever (1)spring retainer (1)semirotary disk (1)stop-lug (1)coin-carrier (1)roebuck patent (1)coin-operated scale (1)tripper mechanism (1)shutter dial (1)coin-controlled device (1)hoboken scale patent (1)coin detective (1)plunger and spring (1)coin washer separator (1)spirometer (1)lung tester (1)strength testing machine (1)electric lamp indicator (1)coin-in-circuit switch (1)washington d.c. patent (1)1903 amusement machine (1)electromagnet test (1)coin-rest (1)pointed slide (1)counterfeit coin device (1)coin-guideway (1)pivoted casting (1)alarm bell (1)tilting bar (1)segmental chute (1)gauge screw (1)leaf spring (1)crank mechanism (1)gauge jaws (1)1906 patent (1)mechanical coin validator (1)coin-testing mechanism (1)gum vendor (1)counterweight escapement (1)early 1900s vending patent (1)fraud preventive device (1)pivoted member (1)adjustable stop (1)return chute (1)telephone pay box (1)kick-off fingers (1)specific gravity coin check (1)early 1900s coin device (1)gravity gripper (1)tilting table (1)counterweight pivot (1)gear-wheel escapement (1)spring return (1)chute diversion (1)counterweight valve (1)magnifying lens (1)prism lens (1)electric relay (1)stop pin detent (1)turnstile mechanism (1)coin-receiving mechanism (1)weight-testing lever (1)counterbalance lever (1)rejection chute (1)releasing disc (1)disk validator (1)gauge plate (1)edge gage (1)fare box (1)token assorting mechanism (1)sizing throat (1)selector slide (1)transit collection device (1)coin ejector (1)gauge slide (1)1920s patent (1)gravity detector (1)pivoted detector teeth (1)electromagnet (1)alternating current (1)coin depository (1)gauge bar (1)player piano coin mechanism (1)plunger pockets (1)anvil bounce test (1)branch slot (1)latch release (1)perforated coin classifier (1)counterweighted pallet (1)coin chute mechanism (1)hook and pivot detector (1)vending machine coin control (1)1930s coin selector (1)spring runway (1)switch finger (1)gravity sizing (1)check controlled device (1)vending machine lock (1)specific gravity not used (1)magnetic attraction lock (1)balancing lever (1)check controlled apparatus (1)electromagnetic sorter (1)impedance coil (1)specific resistance test (1)magnetic armature (1)genuineness detector (1)zigzag anvil (1)scleroscopic principle (1)coin slot (1)slide mechanism (1)amusement device (1)trigger lock (1)telephone pay station (1)counterfeit coin rejector (1)weighted lever gauge (1)1930s vending patent (1)gravity coin sorter (1)coin-weighing scale (1)counterweight beam (1)specific gravity of coin quality (magnetic) (1)fraud prevention device (1)canadian five-cent piece detector (1)slide guide (1)trigger stud (1)vending device patent (1)coin checker (1)wheatstone bridge (1)electromagnetic ejector (1)resistance testing (1)telephone coin box (1)bell crank (1)spring balance (1)magnetic test (1)electrolytic coin detector (1)polarization test (1)check deflector (1)nickel/silver separation (1)electromagnet actuated chute (1)anode-cathode coin test (1)j-shaped chute (1)conductivity test (1)tell-tale device (1)eddy current detector (1)silver coin authenticator (1)chute deflector (1)anti-counterfeit device (1)edison patent (1)coin testing (1)chute sorter (1)spurious coin (1)electrical signalling (1)circuitous path (1)impact mechanism (1)visual coin indicator (1)oakland california inventor (1)shaded pole magnet (1)eddy current sensing (1)electromagnetic coin sorter (1)split-phase field (1)mercury switch timer (1)vending mechanism patent (1)electromagnetic (1)transformer secondary (1)phase displacement (1)coin routing (1)split-phase motor principle (1)coin testing machine (1)eddy current detection (1)vending machine coin chute (1)silver alloy detection (1)bouncing block (1)slug ejector (1)counterpoise (1)gravity ejector (1)specific weight test (1)counterweighted trap door (1)circuitous coin track (1)coin-op patent 1930s (1)selector pivot (1)pivot ejector (1)digger crane machine (1)check tester (1)balance mechanism (1)weight rejector (1)lever arm balance (1)plunger mechanism (1)coin tube (1)spring-loaded head (1)payphone security (1)coin thickness gauge (1)calibrating pins (1)escutcheon plate (1)adjustable knob (1)chemical assay (1)nitric acid test (1)cash register accessory (1)silver test (1)spring-loaded slot bar (1)pole piece (1)specific gravity separator (1)counterweight balance (1)clutch pin detector (1)wurlitzer patent (1)anti-tilt mechanism (1)ball runway (1)five-cent coin gauge (1)tamper-proof coin chute (1)counter-balanced pivot arm (1)weight tester (1)coin carriage (1)nickel detector (1)seeburg coin mechanism (1)vacuum tube amplifier circuit (1)1930s coin-op hardware (1)rebound member (1)knife edges (1)nickel sorter (1)die-casting slug (1)paramagnetic sorting (1)canadian nickel detector (1)scavenger chute (1)paramagnetic (1)diamagnetic (1)coin sorting (1)weighing pendulum (1)sizing gauge (1)overload release (1)thermoelectric relay (1)genuine coin sensor (1)coin deflector (1)pivoted segregator (1)spring thrust member (1)accept/reject slot (1)1940s coin sorter (1)shoulder deflector (1)washer rejector (1)eddy current sorting (1)thickness gauge (1)pivoted balance (1)thermocouple detector (1)electromagnet detent (1)nickel tester (1)seeburg patent (1)bounding block (1)tilt safety mechanism (1)deflector (1)thermocouple coin detector (1)electromagnet gate (1)chute and cup return (1)thermoelectric voltage sensing (1)relay-controlled coin sorter (1)coin slug rejector (1)seeburg assignee (1)heated contact pin (1)1940s coin acceptor (1)clockwork delay relay (1)magnetic coin test (1)conductivity sorting (1)pivoted abutment (1)dual denomination sorter (1)magnetic coin tester (1)coin separator mechanism (1)scavenger spring (1)vending machine coin mechanism (1)para-magnetic slug detection (1)coin control chute (1)pivoted dog latch (1)selector switch circuit (1)gravity coin chute (1)anti-fraud vending device (1)electromechanical coin actuator (1)coin detection (1)oscillator circuit (1)vacuum tube relay (1)fare registering machine (1)inductance sensing (1)electromechanical counter (1)apertured coin detection (1)weighted feeler (1)coin-sizing cradle (1)magnet conductivity test (1)nickel chute (1)counterweight arm (1)change-return (1)electromechanical coin sorter (1)paramagnetic detection (1)1950s coin mechanism (1)