US1773891A - M f thompson - Google Patents

M f thompson Download PDF

Info

Publication number
US1773891A
US1773891A US1773891DA US1773891A US 1773891 A US1773891 A US 1773891A US 1773891D A US1773891D A US 1773891DA US 1773891 A US1773891 A US 1773891A
Authority
US
United States
Prior art keywords
voting
switches
magnet
buttons
switch
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3420336&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US1773891(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application granted granted Critical
Publication of US1773891A publication Critical patent/US1773891A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C13/00Voting apparatus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/29Arrangements for monitoring broadcast services or broadcast-related services
    • H04H60/33Arrangements for monitoring the users' behaviour or opinions

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Social Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)

Description

Aug. 26, 1930.
M.F.THOMPSON PARLIAMENTARY VOTING SYSTEM AND APPARATUS THEREFOR Filed Sept. 11, 1923 www Nnnlfm y@ 3 Sheets-Sheet l Aug. 26, 1930. M. F THoMPsoN 1,773,891
PARLIAMENTARY VOTING SYSTEM AND APPARATUS THEREFOR mail Au'g. 26, 1930. y Y M F, THQMPSON 1,773,891
PARLIAMENTARY VOTING SYSTEM AND APPARATUS THEREFOR Filed Sept. ll, 1923 5 Sheets-Sheet 5 J3 4 A 3 /d SZ a Z /3/ /28 95 34 53 /08 s Patented Aug. 26, 1930 UNITED STATES PATENT OFFICE o MARSHALL F. THOMPSON, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR T lAMERICAN SIGNAL CORPORATION, OF WASHINGTON, DISTRICT 0F COLUMBIA PARLIAMENTARY VOTING SYSTEM AND APPARATUS THEREFOR Application filed September 11, 1923. Serial No. 662,115.
This invention relates to electrical voting systems, and more particularly to improvements in the mechanism comprising the individual voting stations, through which each member of the legislative body passes his vote.
Actual practice has demonstrated that a practicalvoting mechanism for the individual member of a legislative body, must provide for,
1st The selective casting of any one of a plurality of dii'erent votes',
2nd- The casting of only one vote at a time,
3rd Changing of the vote,
4th Resetting of the mechanism by a remote control,
5th and lastly, locking the mechanism against operation either at the individual station or by a remote control.
Numerous attempts have been made to accomplish the foregoing, but these have resulted in complicated mechanisms, requiring a great multiplicity of electro-magnets, re-
sulting in bulky and costly structures, costly to maintain and constantly out of order.
It is therefore the primary object of the present invention to provide an individual voting unit, wherein simple mechanical means is combined with a novel arrangement of electro-magnets, the latter being common to both individual and remote control, thus reducing the number of magnets required, cost of manufacture and maintenance, and the possibility of the apparatus getting out of order.
With the above and other objects in view,
which will, appear as the description proceeds, the invention resides in the novel conv struction, combination and arrangement of parts substantially. as hereinafter described and more particularly deiined by the appended claims, it being understood that such changes in the precise embodiment of herein disclosed invention may be vmade as come within the scope -of the claims.
In th'e accompanying drawing is illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles the present invention, the same being taken on the line 1 1'of Figure 5.
Figure 2 is a similar view taken on the line 2 2 of Figure 5.
Figure 3 is an enlarged fragmentary sec tion taken on the line 3 8 of Figures 5, 6, and 7.
Figure 4. is an enlarged fragmentary section taken on the line 4-4 of Figure 5, the electrical circuits and other parts of the mechanism being shown diagrammatically. Figure 5 is a top plan view.
Figure 6 is a transverse sectional View taken on the line 6 6 of Figures 2 and 3.
Figure 7 is a transverse section taken on i the lines 7 7 of Figures 2 and 3.-
Figure 8 is a transverse section taken on the lines 8 8 of Figures 1, 2 and 3.
Figure 9 is a transverse section taken on the line 9 9 of Figure 1.
Figure 10 is a transverse detailed section taken on the line 4 4 of Figure 5.
Figuresll, 12, 13, and 14 are similar views sluwing the parts in their various positions, an
Figure 15 is a detailed sectional view taken on the line 15-15 of Figure 10.
Referring now particularly to the accompanying drawings, 052 (Fig. 1) designates a tubular standard having its end threaded into the bottom of a cylindrical housing as and secured therein by means of a nut 71.V
The tubular standard AZ-serves to house the wires 80 which lead to the various switches contained withinthe housing, as will be hereinafter described more in detail. A pluralityof spaced vertical posts 81 (Figs. 1 and 9). carried by the bottom of the housing interiorily thereof, support upon their upper ends a circular plate 82 (Figs. 10, 11 and 14), which carries the mechanism contained within the voting station. Formed diametrically of the plate 82, is a series of three openings in which are supported for vertical movement the three voting switches, S1, S2, and S3'.
These voting switches S1, S2, and S3, have their upper ends provided with buttons 83 (Figs. 4, 13 and 14) which project through registering openings formed in a face plate 84 secured on the upper side of the supporting plate 82 by means of screws 84 (Fig. 5). Each of the switches S1, S2, and SS, besides the cylindrical buttons 83, comprises a plunger 85 having an enlarged cylindrical portion 86 disposed immediately below the buttons 83 and engaged in the opening of the supportingT plate 82 to render the same accurate and rigid in operation. The lower ends of the plungeis 85 are engaged in circular bores 85 formed in a supporting plate 88, which is spaced below the supporting plate 82 and carried thereby. Mounted on each plunger 85 is a cylindrical block 89 of an insulating material which carries a metal contact band 90 adapted to form a connection between the brushes or contact members 91 and 92, respectively, the upper pair of brushes 91 being normally contacted with the band 90 when the plunger is disposed in normal and inoperative position. Surrounding the lower` end portions of the plungers 85 are coiled springs 93 interposed between the lower supporting plate 82 and the insulating block 89, which serve to normally force the plungers upwardly and into their normally inoperative positions, whereby a circuit is completed between the contact bands 90 and the brushes 91 engaging the same, while the circuit is broken between the lower set of brushes. The cylindrical portion 86 serves to limit the upward movement of the plungers.
When one of the voting switches S1, S2,
I or S5 is depressed, the circuit is broken between the upper brushes 91 and a circuit is closed through the lower set of brushes 92, which depression performs the voting operation, as will be later described.
Cooperating with the three voting switches, S1, S2, and S3, is a mechanical locking device which comprises a lower member or plate 94 having openings therein through which the plungers 85 are movable, the upper ends of these openings being countersunk to provide recesses 95 for the reception of the conical enlargements 96.
Loosely mounted on the upper face of the plate 94 is the plate 97, provided with a serie's or" openings 98, which correspond to the openings in the plate 94, but which are normally held out of alignment therewith by means of a spring 99 urging the locking plate 97 into engagement withthe plunger 85. The openings 98, in the second or locking plate 9 are of a size to admit the passage therethroughof the conical enlargements 96 of the plungers 95, and when the latter are depressed, conical faces of the enlargements 96 engage the edges of the openings 98 and move the locking plate 97 against the tension of the spring 99, bringing the openings into alignment with the conical portions to permit the same to pass therethrough, after which the plate 97 snaps over the top of the conical portion and retains the depressed button in its operative position. In its normal position, the movable plate 97 is urged against the plungers 85 under the conical enlargements 96 and prevents depression of the plungers until the plate is moved from under the conical enlargements, as will be hereinafter described in detail.
Positioned upon the locking plate 97 intermediate the switches S1, S2, and S3, is a pair ot locking members 100 and 101, respectively, which locking members have their opposite ends bevelled, corresponding to the conical faces of the enlargements 96 of the plungers 85, so that upon the depression of any one ot' the plungers the adjacent locking member is forced laterally under the conical face of the adjacent button or buttons, thus preventing depression of the same. Should either of the outer buttons be depressed the plates 100 and 101 are so arranged with the adjacent ends abutting, as to cause lateral movement of both plates, thus locking the remaining switches against depression.
The plate 94 is provided, intermediate the openings for receiving the plungers 85, with an additional pair of openings for the reception of pins 102 and 103, respectively, which pins are actuated by the solenoids 104 and 105, respectively. These solenoids are carried by the lower plate 88 and are secured in position between the same and another supporting plate 106, which is spaced below the plate 82 and carried thereby by a plurality of spaced posts 107.
The operating pins 102 and 103 are mounted on the upper ends of the plungers of the solenoids 104 and 105, respectively. The upper ends of the operating pins are conically formed for engagement in the intermediate openings in the plate 97 for the purpose of camming the same laterally against tension of the spring 99 to permit depression of the switches or release the same from their depressed position. The loclring members 100 and 101 are provided with a conical opening into which the ends of the pins 102 and 103 project when the solenoids 104 and 105 are energized, these openings beloll lllf
lll!
ing of a suilicient size to prevent disturbance KC i to effect release of the depressed buttons and permit their return to normal position ready for the next vote. l
The correction switch S4 is provided to permit a member to alter his vote, when he has through error or otherwise mani ulated one of the voting switches S1, S2, or S3, and this correction switch S4 is located at one side of the intermediate voting switch S2, as shown in Figure 5. rlhe correction switch S4 comprises a shaft 108 2. 3 and 6) journaled through the face plate 84 and has its lower end journaled in the supporting block 88. Mounted at an intermediate point onl the shaft 108 is a cylindrical block of insulation 109, (Figs. 3 and 4) having disposed diametrically therethrough a Contact member 110 which, in the normal position of the shaft 108, completes a circuit between a pair of contact fingers 111 connected in the circuit with the solenoid 104 to permit energizing of said solenoid upon actuation of the reset switch Ss of the main station. Extending diametrically through the insulating block 109 at right angles to the Contact member` 110 is a second contact member 112,
which when the spindle is given a quarter turn completes a circuit through a pair of contact fingers 113, which, as best shown in Figure 4, close the circuit energizing thc solenoid 104.
The exposed free end of the shaft 108 is provided with a finger piece 114 imparting thereto the necessary rotary movement, which movement is limited to the desired quarter turn by means of a stop member 115 (Figs. 4 and 6). which is secured on the spindle immediately above the cylindrical block of insulation 109. The stop member comprises a pair of extensions 116 and 116 arranged ninety degrees apart. and which cooperate `with a lug 117 for effecting the desired limitation of movement of the spindle.
Encircling-the spindle 108 and interposed below the lower end'of the cylindrical block 109 vand the opposedextension 82 of the plate 88, is a coil of spr-ing 108 arranged to be placed under tension by the turning movement of the vspindle 108 to that position` side of the mechanical locking device and,
has one end engaged in an eye 118 projecting from the adjacent side of the lower member or plate 94, while the other end of the .station itself.
spring is fastened to the free end of a lever 119 having its opposite end pivoted to the lower plate 94. As shown in Figures 10 to 14 inclusive, the lever 119 engages one end of the plate 97 and normally urges the same into engagement with the plungers 85Vfor the purpose heretofore described. Positioned adjacent the intermediate voting switch S2, is an individual lstation lock N. (Figs. 1 to 5) comprising a tumbler lock of conventional type, and operable by means the brushes 123. A second contact member 124, passing through the block 121 below the upper Contact member, is adapted to form a contact between a second set of brushes 125. Below the block 121 the spindle is provided with a square extension 126 which cooperates with a pair of opposed spring members 127, to retain the spindle in either one of its positions. Projecting radially from the cylinder 118, is a pin 128, which engages a pair of stop pins 131 spaced apart substantially ninety degrees, to limit .the rotary movement of the cylinder 118.
As will be later pointed out, the switch N controls the solenoid 105 and closes a circuit of the remaining switches when the key is inserted and the spindle rotated to that position shown in Figure 4.
When the solenoid 105 is energized upon closing the circuit to the switch N, .the pin 103 is projected upwardly as shown 1n Figure 10, which forces the plate 9'( laterally so that theopenings registering with the conical portions 96 of the switches S1, S2. and S3, are withdrawn from under the shoulders of said projections 96, thus-permitting theselected depression of any one of the voting buttons. Thus, it will be seen that when a member leaves his desk and the-solenoid 105 is deenergized by opening the switch N, the pin 103 is withdrawn from the plate 97 permitting the same to'be forced under the projections 95 and thus lock the station against operation.
vAs shown in Figures 4 and 5,. the face fplate 84, enclosing the upper end of the voting station casing A3, is preferably flanged at its upper side to provide a circular depression for the reception therein of a transparent disc 33 to expose through the same the data applied to the face of the plate for the proper identification of the various switches and the Briefly describing the operation of the present invention, with particular reference to Figure 4, wherein the voting mechanism is shown in its normal position, the locking switch N is first turned to that position shown, which closes a circuit from the battery B, the clerk having previously closed the double switch S5 in the circuit D. This energizes the solenoid 105 which actuates the pin 108 to shift the plate 97 and permit the selective depression of any one of the voting buttons S1, S2, or S3. After the member has voted, by depressing any one of the buttons as, for example, the button S1, a contact is made through the brushes 92 which closes the circuit E from the battery and actuates a vote recording or indicatinf mechanism, which for the purpose of simplicity will hereinafter be referred to as the vote indicating means, designated by the letter X.
Should the member then decide to change his vote the correction switch is rotated, which makes a contact between the brushes 118, thus closing the circuit F from the battery and energizing the solenoid 104 which projects the pin 102 through the plate 97, :is shown in Figure 13, which action forces the plate 97 laterally, releasing the button. previously depressed. The member may then select any other button desired.
After the voting period has expired and it is desired to prevent further manipulation of the voting buttons in order that the vote may be properly recorded, the clerk opens the double switch S5, which deenergizes the solenoid 105 and also breaks the circuit G passing through the lock N and to the brushes 118 of the correction switch S4, thus preventing the individual from releasing the vote previously cast. A record may then be taken after which the clerk at the main station may reset the individual voting mechanism to the normal position by closing the switch S in the circuit H, which through 4the brushes 111 will energize the solenoid 104, thus actuating the plate 97 to release the depressed button. rl`he voting-station is then clear and ready forjhe next vote.
As shown in Figure 4, depression of the button S2 will close the circuit l, actuating the vote indicating mechanism Y, and depression of the button S3 closes the circuit J, which actuates the vote indicating means Z, it being understood that the means X, Y, and Z, provide for the indicating or f vidual voting station may be locked against operation, 'or resetting, by remote controls provided at a main station.
l claim:
1. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, a reset circuit, and a locking circuit, said mechanism comprising a plurality of manuallv operable switches for controlling said voting circuits, means for locking said switches against operation and retaining said switches in operative position, means for preventing actuation of two or more switches at one time, an electro-magnet for releasing said retaining means, a switch for cont-rolling said electro-magnet, a second electro-magnet for actuating said locking means to permit actuation of said voting switches, and a switch for controlling said second magnet.
2. An individual voting mechanism for electrical voting systems having a plurality of diiferent voting circuits, a reset circuit, and a locking circuit, said mechanism comprising a pluralityv of manually operable switches for controlling said voting circuits, means for locking said switches against operation and retaining said switches in operative position, means for preventing actuation of two or more switches at one time, an electro-magnet for releasing said retaining means, a switch for controlling said electro-magnet, said magnet also being controlled bv said reset circuit, a second electromagnet for actuating said locking means to permit actuation of said voting switches, and a switch for controlling said second magnet, said second magnet also being controlled by said locking circuit.
3. An individual voting mechanism for electrical voting systems having a plurality of diife'rent voting circuits, said mechanism comprising a plurality of manually operable switches for controlling said voting circuits, mechanical means for locking said switches Vagainst operation and retaining said switches in operative position, mechanical means for preventing actuation of two vor more switches at one time, an electro-magnet for releasing said retaining means, a switch for controlling said electro-magnet, a second electromagnet for actuating said locking means to )INI permit actuation of said voting switches,
and a switch for controlling said second magnet.
4. An individuah voting mechanism for electrical voting systems having a plurality of different voting circuits, said mechanism comprising a plurality of manually operable switches for controlling said voting circuits, combined mechanical means for locking said switches against operationand for retaining said switches in operative position, an electro-magnet for actuating said mechanical means to permit operation of said switches, and a second magnet for actuating said mechanical means to release said switches from their operative position.
5. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, said mechanism comprising a plurality of manually electrical voting systems having a plurality operable switches for controlling said voting circuits, combined mechanical means for locking said switches against operation and for retaining said swictlies in operative position, an electro-magnet for actuating said mechanical means to permit operation of said switches, a lsecond magnet for actuating said mechanical means to release said switches from their operative position, and means for preventing actuation of two or more switches at one time.
6. An individual voting mechanism for electrical voting systems having a plurality of dilierent voting circuits, said mechanism comprising a plurality of manually operable switches for controlling the voting circuits, combined mechanical means for locking said switches against operation and for retaining said switches in operative position, an electro-magnet for actuating said mechanical means to permit operation of said switches, a switch for controlling said electro-magnet, a second electro-magnet for actuating said mechanical means to release said switches from their operative position, and a switch for controlling said second magnet. 'i
7. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, alreset circuit and a locking circuit, said mechanism comprising a plurality of manually operative switches for controlling said voting circuits unitary mechanical means for locking said switches againstoperation and for retaining the switches in their operative position, an electro-magnet for actuating said mechanical means to permit operation of said switches, a switch for controlling said electro-magnet, said electro-magnet being also controlled by said locking` circuit, a second elecro-magnet for actuating said mechanical means to release said switches from their operative position, a switch for controlling) said second magnet, said second magnet eing also controllable by said reset circuit, and' means for preventing operation of more thanr one switch at a time. l
8. Anindividual voting mechanism lfor7 of different voting circuits, a reset circuit and a locking circuit, said mechanism comprising a plurality of depressible switch buttons for controlling said voting circuits, means for normally locking said buttons ainst depression, electro-m'agnetic means or actuating said locking means to pe/rmit depression of said buttons, a switch for controlling said electro-magnetic means, said electro-magnetic means being also controlled by said lockin circuit, a second electro-magnet for actuating said mechanical means to release said buttons from their depressed position, a switch for controlling said second electromagnet, said second electro-magnet being controlled by said reset circuit independently of said switch. v Y
9. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, a reset circuit and a locking circuit, said mechanism comprising a plurality of depressible switch buttons for controlling said voting circuits, means for normally locking said buttons against depression, electrofmagnetic means for actuating said locking means to permit depression of said buttons, a switch for controlling said electro-magnetic means, said electro-magnetic means being also controlled by said locking circuit, a second electro-magnet for actuating said mechanical means to release said buttons from their depressed position, a switch for controlling said second electromagnet, said second electro-magnet being controlled by said reset circuit independently of said switch, and means for preventing the depression of more than one button at a time.
10. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, a reset circuit and a locking circuit, said mechanism comprising a plurality of depressible switch buttons for controlling said voting circuits, combined mechanical means for locking said buttons against depression and for retaining said buttons in depressed position, an electromagnet for actuating said mechanical means to permit depression of said buttons, a switch for controlling said electro-magnet, said electro-magnet being also controlled by said locking circuit, a second magnet for actuating Said mechanical means to release said buttons from their depressed position, a switch for controlling said second magnet, said second magnet being also controllable independently of said reset switch by said reset circuit.
.11. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, a reset circuit and a. locking circuit, said mechanism comprising a plurality of depressible switch buttons for controlling said voting c1rcu1ts, combined mechanical means for locking said buttons against depression and for retaining said buttons in depressed position, an electromagnet for actuating said mechanical means to permit depression of said buttons, a switch for controlling said electro-magnet, said electro-magnet being also controlled bysaid locking circuit, a second magnet forI actuating said mechanical means to` release said buttons from their depressed position, a switch for controlling said second magnet,
said second magnet being also controllable independently of said reset switch by said reset circuit, and means for preventing actuation of two or more switches at one time.
12. An individual voting mechanism for electrical voting systems having a plurality of dierent voting circuits, said mechanism comprising a plurality of depressible switch buttons for controlling said voting circuits, a movable plate for normally preventing depression ot' said buttons and for retaining said buttons in their depressed position, a member for actuating said plate to permit depression of said buttons, an electro-magnet for actuating said member, a second member for actuating said means to release said buttons from their depressed position, and an electro-magnet for actuating said second member.
13. An individual voting mechanism for electrical voting systems having a plurality of dierent voting circuits, said mechanism I comprising a plurality of depressible switch buttons `for controlling said voting circuits, a movable plate for normally preventing depression or" said buttons and for retaining said buttons in their depressed position, a member for actuating said plate to permit depression of said buttons, an electro-magnet tor actuating said member, a second member tor actuating said means to release said buttons from their depressed position, an electro-magnet for actuating said second meinber, and a second plate engageable upon depression ot one button to prevent depression ot the other buttons.
14. An individual voting mechanism for electrical voting systems having a plurality of different voting circuits, a reset circuit and a locking circuit, said mechanism comprising a plurality ot depressible switch buttons controlling said voting circuits, a movable plate or normally locking said buttons against depression and serving to retain said buttons in their depressed position, electromagnetically controlled means for actuating said plate to permit depression of said buttons, a locking switch for controlling said electroTmagnet, and a second electro-*nagnetically controlled means for actuating said movable plate to release said buttons from their depressed position, a switch Jfor controlling said second electro-magnet, said second electro-magnet being also controllable by said reset circuit, and said first mentioned electro-magnet being controlled by said locking circuit, and a plate engageablenn depression of any one of said buttons to prevent depression or" any one of the remaining buttons.
In testimony whereof I affix my signature.
MARSHALL F. THOMPSON.
US1773891D M f thompson Expired - Lifetime US1773891A (en)

Publications (1)

Publication Number Publication Date
US1773891A true US1773891A (en) 1930-08-26

Family

ID=3420336

Family Applications (1)

Application Number Title Priority Date Filing Date
US1773891D Expired - Lifetime US1773891A (en) M f thompson

Country Status (1)

Country Link
US (1) US1773891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281823A (en) * 1966-10-25 Foresman, jr vote indicator system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281823A (en) * 1966-10-25 Foresman, jr vote indicator system

Similar Documents

Publication Publication Date Title
US3430200A (en) Validator apparatus for magnetic credit cards and the like
US1773891A (en) M f thompson
US2581218A (en) Interlocking mechanism for register apparatus
US2536155A (en) Adjustable machine control plate
US2903687A (en) Keyboard mechanism
US2164698A (en) Multiple card punching machine and checking system
US2559796A (en) Automatic timing device
US1170731A (en) Voting-machine.
US2083782A (en) Combination lock
US3189695A (en) Device for regulating multiple concurrent electrical pulses
US2259677A (en) Elapsed time recording device
US1219053A (en) Voting apparatus.
US2352847A (en) Coin handling mechanism
GB1393108A (en) Timing mechanism
US2109229A (en) Electric control mechanism for vot
US2471617A (en) Coin-operated typewriter control apparatus
US2969174A (en) Error code indications providing devices for use in tape punches
US2363729A (en) Voting machine
US1841746A (en) Electric alarm clock
US2561272A (en) Voting machine
US1157839A (en) Telegraphy.
US3369086A (en) Selecting system
US2994736A (en) Keyboard access control system
US2543694A (en) Helicoid switch unit for signaling systems
US2498380A (en) Ransom f