US1933244A - School traffic gate - Google Patents
School traffic gate Download PDFInfo
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- US1933244A US1933244A US584854A US58485432A US1933244A US 1933244 A US1933244 A US 1933244A US 584854 A US584854 A US 584854A US 58485432 A US58485432 A US 58485432A US 1933244 A US1933244 A US 1933244A
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- arm
- post
- stop
- sleeve
- swinging
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
- E01F13/04—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage
- E01F13/06—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage by swinging into open position about a vertical or horizontal axis parallel to the road direction, i.e. swinging gates
Definitions
- This invention relates to a school traffic gate, and has for its object to provide a pair of gates, one to prevent vehicular trafiic along astreet and the other to prevent pedestrian traffic along a sidewalk leading across the street.
- v i i It is also an object of this invention to'provide two cooperating stop 'arms, one a'vehicular stop arm and the other a pedestrian'stop arm,- and having these arms so connected that the vehicular stop arm is in stop position whenever the pedestrian stop arm is in position to permit pedestrians to pass. 7
- Figure 1 is a view showingone form of the present invention, with the vehicular stop arm in trafiic stopping position. i I
- Figure 2 is a section through the base member, showing'the manner in which the post is supported.
- Figure 3 is a section on the line 8-3 of Figure 1.
- Figure 4 isa section through the supporting post with the arms attached thereto when the apparatus is not being used.
- v Figure5 is a view of the form shown in Figure 1 with the trafiic pole elevated.
- Figure 6 is a section on the line 66 of Figure 5.
- Figure '7 is a view showing the vehicular stop in stop position but with the control sleeve in position for it to be moved to open position for vehicular traffic.
- Figure 8 is a section on the line 88 of Figure I.
- Figure 9 is a section on the line 99 of Figure 1.
- Figure 10 is a section on the line 10-10 of Figure 1. i
- Figure 11 is aslightly modified form showing the apparatus in position to stop both vehicular and pedestrian traffic.
- Figure 12 shows a form similar to that of Figure 11, but with the arms raisedfor permitting pedestrian traffic to pass.
- Figure 13 is aview similar to Figure 11 but looking at a right angle to the form shown in Figure 11.
- Figure le is a view showing'the vehicular traflic arm elevated.
- the pedestrian trafi'ic arm is in horizontal position for-stopping pedestrians.- i
- a vertical post serving as a support.
- the post is indicated by the numeral 2 and is supported in a concrete base 1.
- a cap 3 attached there to by means of a pin 4.
- Extending upwardly from'the cap is a pair of ears 5, the purpose of which will be described later.
- a sleeve 6 Supported on the upper end of the post beneath the cap is a sleeve 6, supported by means of rollers 7, one on each side, supported by a common pin 8. This sleeve is adapted to rotate around the post on the rollers '7. Extending from one side of the sleeve is a projection 9, which has a hole therein toreceive one end of a metal pipe 10, which has in it a spring 10a adapted to receive in tight position one end of a bamboo or other stop arm 11. While in the present instance this arm or pole is shown made of bamboo, any suitable material may be used.
- an arcuate, substantially semi-circular extension 12 Extending upwardly from the sleeve 6 is an arcuate, substantially semi-circular extension 12, which has on its upper surface, at each edge, a stop.
- One stop 13, at one edge, has adjacent thereto a slotl.
- On the other side of this extension is a stop 15.
- These stops limit the rotary movement of the sleeve 6 and the projection 9.
- the stops permit a 10 and the stop arm 11 through substantially ninety degrees so that the arm 11 may either permit or close off pedestrian trafiic along an adjacent sidewalk.
- the numeral 16 is used to designate a sleeve, which has extending'laterally therefrom a flat flange 17 pivoted between the ears 5 by means of a pin or bolt 18. As shown in Figure 8 this bolt is located in one side of the flange 1'7, providing an extension beyond oneside of the bolt 18, which serves as a stop 19. This stop 19 rests on the upper end of the extension 12, on the upper end of the sleeve 6.
- the sleeve 16 When the sleeve 16 is in a certain position it may be rocked on the pin or bolt 18, with the stop 19 passing through the slot My When this part 19 passes through the slot 14 the sleeve 16 may be swung to a vertical position, with the flangeli in a horizontal position.
- a .counterpoised weight 20 Extending from one end of the sleeve is a .counterpoised weight 20, which also serves as a handle for moving the sleeve 16 about its pivot 18.
- a plug of wood 21 Located within the sleeve 16 and the coun terweight 20, and extending from the sleeve in the direction opposite to the counterweight, is a plug of wood 21.
- the part of the plug extending from the sleeve is indicated by the numeral 22, and is adapted to receive thereon one movement of the pipe end of a bamboo pole 23 which serves as a trafiio si nal.
- a guy rod 24 Suitably attached to the bamboo pole is a guy rod 24, one end of which is attached to the pole while the other end is attached to an arm 25 extending laterally from thesleeve 16 in the opposite direction to that of the flange 17.
- This arm 25' and guy rod tend tosupport the bamboo pole in a horizontal position, as shown in Figure 1, and prevent the sagging of the free end of the pole.
- stops 26 In order to hold the bamboo pole in the position shown in Figures 1 and 8, there are provided on the flange 17 and the ears 5, stops 26. These stops are best shown in Figures 5 and 8. In Figure 8 they are in engage ment with each other for holding the bamboo pole in ahorizontal position. In Figure 5 these steps are out of engagement with the bamboo pole in a vertical position.
- a plate 27, with a sign stop thereon Suitably placed at some convenient point on the member 23 is a plate 27, with a sign stop thereon.
- Each stop member is hand-operated.
- the stop pole 23 cannot move out of traiiic-stopping position until the stop arm 11 has been moved to a position to stop pedestrian traffic crossing the road.
- This apparatus is used to control trafiic along one highway with the pedestrian traiiic leading across the highway.
- a chain 28 is attached to a suitable eye or' ring 29on the post 2.
- This chain has in connection therewith a padlock 3.0.
- the bamboo stop arm 11 may be removed from the pipe 10 and attached to the post 2 by means of an eye 31.
- the chain23 passes around the post 2, the counterweight 20 and the stop arm 11 and is fastened around these members by means of the padlock 30, which engages the chain and also the eye 31.
- the post is indicated by the numeral 32, and has extending from'one side thereof, near its upper end, a pair of ears 33 between which one end of a socket member 34 is pivoted.
- an arcuate armies Extending upwardly from this socket member is an arcuate armies, which extends through and moves in an arcuate slot 36 near the upper end of the post 32.
- a notch 37 In the free end of this arcuate arm is a notch 37, as shown in Figure 12.
- On the extreme upper end of the post 32 is a pair of ears 33, between which is pivoted a circular disc 39 by means of a pivot pin 40.
- a notch 40a which has adjacent one side thereof a stop 41 adapted to engage the post between the ears to hold a sleeve 42 in a horizontal position.
- This sleeve is located on the circular disc opposite the notch 40a and is adapted to receive one end of a vehicular traffic stop arm 43.
- a stop arm 44 adapted to extend across the sidewalk for stopping pedestrians.
- the arms 44 and 43 are at right angles to each other so that when one is in position the other may be elevated for passage of traffic.
- the two arms 43 and-44 are in a horizontal position. Either arm may be elevated.
- the vehicular traffic arm is elevated for the passing of vehicles.
- the circular disc 39 fits in the notch 37 and across the arcuate arm 35 against movement so that the stop arm 44 cannot be raised until the arm 43 is lowered, thereby preventing pedestrian traffic as long as vehicular traific is permitted.
- Figure 2 there is shown a means by which the standards may be supported in the concrete base.
- a permanent pipe 45 which has at its upper end means for securely attaching the lower end ofthe post 2 or the post 32.
- a post In a trafiic gate, a post, a horizontally swinging arm pivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, and means operated by the swinging of one arm to prevent the swinging of the other arm, said means including an arcuate projection.
- a post In a trafiic gate, a post, a horizontally swinging arm pivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, and means operated by the swinging of one arm to prevent the swinging of the other arm, said means including a projecting stop on one arm and an arcuate projection on the other arm.
- a post In a trafiic gate, a post, a horizontally swinging armpivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, an arcuate projection on the horizontally swinging arm, said projection having a slot therein, and means on the vertically swinging arm to engage the projection to prevent the swinging of the arm and adapted to fit in the slot so the arm can swing.
- a post pivoted at one end to the post, and cooperating means on the arms to limit their swinging movements and adapted when either arm is in certain positions to prevent the other arm from swinging, said means including anarcuate projection forming a stop engaging surface having at one end a stop and at the. other end a notch and a stop, and a stop adapted to engage the surface or fit into said notch.
- a traffic gate a post, a pair of rollers on the post, av sleeve supported on the rollers, for rotation around the post, an arm on the sleeve, a second arm pivoted at one end to the post, and cooperating means for preventing the movement of one arm when the other-is in certain positions.
- apost In a traffic gate, apost, a pair of rollers on the'post, a sleeve supported on the rollers for rotation around the post, a second sleeve having a lateral projection, said projection being pivoted to the upper end of the post whereby the second sleeve has a rocking movement, and means on the first sleeve and the lateral projectionto prevent the movement of one sleeve when the other sleeve is in certain positions.
- a traffic gate a post, a pair of rollers on thepost, a sleeve supported on the rollers for rotation around the post, an arcuate projection extending upwardly from the sleeve, said projection having a stopsurface with a stop at one end and a stop and notch at the other end, and a second sleeve having a lateral projection, said projection being pivoted at one side to the upper end of the post and having on its other side a stop to engage said projection surface or fit in the notch whereby the movements of the sleeves are controlled.
- a traffic gate in combination with a base having a post receiving hole, a post adapted to be placed in said-hole, a sleeve rotatably supported on the post, a second sleeve pivoted on top of the post for a vertical swinging movement, and
- interlocking means on thesleeves whereby one sleeve is locked against movement when the other is in certain positions.
- a post having a pair of ears on its upper end and a slot intersecting the space between the ears, a sleeve having on one side a laterally extending disc pivoted between the ears, a socket member pivoted to the post, and an arcuate arm extending from the socket member through the slot, the arcuate arm and the 1 disc, each having a notch through which one may move when the other is in a certain position.
- a trailic gate a post, a pair of vertically swinging arms on the post, and cooperating means on said arms adapted when the arms are in horizontal positions to permit the upward swing of either arm but adapted to prevent the upward swinging movement of either arm when the other has been swung upwardly, said means including i a disc on one arm and an arcuate arm on the other arm, said arcuate arm extending through the post.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Description
Oct. 31, 1933. v M. E. DENNY 1,933,244
SCHOOL TRAFFIC GATE Original Filed Jan. 5, 1952 4 Sheets-Sheet l A TTOE/VEY Oct. 31, 1933. M E, DENNY 1,933,244
S CHOOL TRAFFI C GATE Original Filed Jan. 5. 1932 4 Sheets-Sheet 2 yMgQ By ATTORNEY} Oct. 31, 1933. M DE Y 1,933,244
SCHOOL TRAFFIC GATE Original Filed Jan. 5, 1932 4 Sheets-Sheet 3 A TTORNEYS Oct. 31, 1933; M E DENNY' 1,933,244
SCHOOL TRAFFIC GATE Original-Filed Jan. 5, 1932 4 Sheets-Sheet 4 2 A TTOR/VEYS Patented Oct. 31, 1933 'soHooL TRAFFIC GATE Mark E. Denny, Middletown, Ohio, assignor to The Barkelew Electric Manufacturing Company, Middletown, Ohio, a corporation of Ohio Application January 5, 1932, Serial No. 584,854
' Renewed September 13, 1933 11 Claims. (01. 39-62) This invention relates to a school traffic gate, and has for its object to provide a pair of gates, one to prevent vehicular trafiic along astreet and the other to prevent pedestrian traffic along a sidewalk leading across the street. v i i It is also an object of this invention to'provide two cooperating stop 'arms, one a'vehicular stop arm and the other a pedestrian'stop arm,- and having these arms so connected that the vehicular stop arm is in stop position whenever the pedestrian stop arm is in position to permit pedestrians to pass. 7
It is a further object of this invention to pro vide a pair of swinging arms to regulate vehicular and pedestrian trafiic so that when one trafiic is passing the other is prohibited or prevented from passing.
These and othenadvantages will appear from the following description taken in connection with the drawings.
' Referring to the drawings: 1
Figure 1 is a view showingone form of the present invention, with the vehicular stop arm in trafiic stopping position. i I
Figure 2 is a section through the base member, showing'the manner in which the post is supported.
Figure 3 is a section on the line 8-3 of Figure 1.
Figure 4 isa section through the supporting post with the arms attached thereto when the apparatus is not being used.
v Figure5 is a view of the form shown in Figure 1 with the trafiic pole elevated.
Figure 6 is a section on the line 66 of Figure 5.
Figure '7 is a view showing the vehicular stop in stop position but with the control sleeve in position for it to be moved to open position for vehicular traffic.
Figure 8 is a section on the line 88 of Figure I. Figure 9 is a section on the line 99 of Figure 1.
Figure 10 is a section on the line 10-10 of Figure 1. i
Figure 11 is aslightly modified form showing the apparatus in position to stop both vehicular and pedestrian traffic.
- Figure 12 shows a form similar to that of Figure 11, but with the arms raisedfor permitting pedestrian traffic to pass.
Figure 13 is aview similar to Figure 11 but looking at a right angle to the form shown in Figure 11.
Figure leis a view showing'the vehicular traflic arm elevated. In this form the pedestrian trafi'ic arm .is in horizontal position for-stopping pedestrians.- i In each of the forms there is a vertical post serving as a support. in the form shown in Figure 1 the post is indicated by the numeral 2 and is supported in a concrete base 1. On the upper end of the post 2 is a cap 3 attached there to by means of a pin 4. Extending upwardly from'the cap is a pair of ears 5, the purpose of which will be described later.
Supported on the upper end of the post beneath the cap is a sleeve 6, supported by means of rollers 7, one on each side, supported by a common pin 8. This sleeve is adapted to rotate around the post on the rollers '7. Extending from one side of the sleeve is a projection 9, which has a hole therein toreceive one end of a metal pipe 10, which has in it a spring 10a adapted to receive in tight position one end of a bamboo or other stop arm 11. While in the present instance this arm or pole is shown made of bamboo, any suitable material may be used.
Extending upwardly from the sleeve 6 is an arcuate, substantially semi-circular extension 12, which has on its upper surface, at each edge, a stop. One stop 13, at one edge, has adjacent thereto a slotl. On the other side of this extensionis a stop 15. These stops limit the rotary movement of the sleeve 6 and the projection 9. The stops permit a 10 and the stop arm 11 through substantially ninety degrees so that the arm 11 may either permit or close off pedestrian trafiic along an adjacent sidewalk.
The numeral 16 is used to designate a sleeve, which has extending'laterally therefrom a flat flange 17 pivoted between the ears 5 by means of a pin or bolt 18. As shown in Figure 8 this bolt is located in one side of the flange 1'7, providing an extension beyond oneside of the bolt 18, which serves as a stop 19. This stop 19 rests on the upper end of the extension 12, on the upper end of the sleeve 6.
When the sleeve 16 is in a certain position it may be rocked on the pin or bolt 18, with the stop 19 passing through the slot My When this part 19 passes through the slot 14 the sleeve 16 may be swung to a vertical position, with the flangeli in a horizontal position.
Extending from one end of the sleeve is a .counterpoised weight 20, which also serves as a handle for moving the sleeve 16 about its pivot 18. Located within the sleeve 16 and the coun terweight 20, and extending from the sleeve in the direction opposite to the counterweight, is a plug of wood 21. The part of the plug extending from the sleeve is indicated by the numeral 22, and is adapted to receive thereon one movement of the pipe end of a bamboo pole 23 which serves as a trafiio si nal. I
Suitably attached to the bamboo pole is a guy rod 24, one end of which is attached to the pole while the other end is attached to an arm 25 extending laterally from thesleeve 16 in the opposite direction to that of the flange 17. This arm 25' and guy rod tend tosupport the bamboo pole in a horizontal position, as shown in Figure 1, and prevent the sagging of the free end of the pole. In order to hold the bamboo pole in the position shown in Figures 1 and 8, there are provided on the flange 17 and the ears 5, stops 26. These stops are best shown in Figures 5 and 8. In Figure 8 they are in engage ment with each other for holding the bamboo pole in ahorizontal position. In Figure 5 these steps are out of engagement with the bamboo pole in a vertical position. Suitably placed at some convenient point on the member 23 is a plate 27, with a sign stop thereon. Each stop member is hand-operated. The stop pole 23 cannot move out of traiiic-stopping position until the stop arm 11 has been moved to a position to stop pedestrian traffic crossing the road. This apparatus is used to control trafiic along one highway with the pedestrian traiiic leading across the highway.
In order that the parts 11 and 23 may be assembled and held in idle position when the operation .of the apparatus is not needed, a chain 28 is attached to a suitable eye or' ring 29on the post 2. This chain has in connection therewith a padlock 3.0. When the apparatus is not in use the bamboo stop arm 11 may be removed from the pipe 10 and attached to the post 2 by means of an eye 31. The chain23 passes around the post 2, the counterweight 20 and the stop arm 11 and is fastened around these members by means of the padlock 30, which engages the chain and also the eye 31.
In the form shown in Figures 11 to 14 the post is indicated by the numeral 32, and has extending from'one side thereof, near its upper end, a pair of ears 33 between which one end of a socket member 34 is pivoted. Extending upwardly from this socket member is an arcuate armies, which extends through and moves in an arcuate slot 36 near the upper end of the post 32. In the free end of this arcuate arm is a notch 37, as shown in Figure 12. On the extreme upper end of the post 32 is a pair of ears 33, between which is pivoted a circular disc 39 by means of a pivot pin 40.
At one point in the periphery of this circular disc is a notch 40a, which has adjacent one side thereof a stop 41 adapted to engage the post between the ears to hold a sleeve 42 in a horizontal position. This sleeve is located on the circular disc opposite the notch 40a and is adapted to receive one end of a vehicular traffic stop arm 43. I
Inserted in the free end of the socket member 34 is a stop arm 44 adapted to extend across the sidewalk for stopping pedestrians. The arms 44 and 43 are at right angles to each other so that when one is in position the other may be elevated for passage of traffic. In Figure 11 the two arms 43 and-44 are in a horizontal position. Either arm may be elevated.
In Figure 12 the pedestrian stop arm 44 is elevated. In elevating this arm the arcuate arm 35 is caused to enter the notch 40a, thereby looking the sleeve 42 against swinging movement. This sleeve and arm 43 cannot be moved until the arm 44 is lowered. When the arm 44 is lowered the notches 37 and 40a are adjacent each other so that either arm may be moved, but if one arm be moved the other one becomes immediately immovable.
In Figure 14 the vehicular traffic arm is elevated for the passing of vehicles. When the armis in the position shown in Figure '14 the circular disc 39 fits in the notch 37 and across the arcuate arm 35 against movement so that the stop arm 44 cannot be raised until the arm 43 is lowered, thereby preventing pedestrian traffic as long as vehicular traific is permitted. In Figure 2 there is shown a means by which the standards may be supported in the concrete base.
There is provided in the concrete base a permanent pipe 45, which has at its upper end means for securely attaching the lower end ofthe post 2 or the post 32.
In each of the forms here shown the two traffic regulating means are so collated thatwhen one is open the other must be closed, thereby positively preventing pedestrian trafiic when the way is open for vehicular trafiic, and preventing vehicular trafiic when the way is open for pedestrian traific. v It will be understood} that I desire to comprehend within my invention such modifications as come within the scope of my claims and my invention.
Having, thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is: a 3
1. In a trafiic gate, a post, a horizontally swinging arm pivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, and means operated by the swinging of one arm to prevent the swinging of the other arm, said means including an arcuate projection.
2. In a trafiic gate, a post, a horizontally swinging arm pivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, and means operated by the swinging of one arm to prevent the swinging of the other arm, said means including a projecting stop on one arm and an arcuate projection on the other arm.
3. In a trafiic gate, a post, a horizontally swinging armpivoted at one end to the post, a vertically swinging arm pivoted at one end to the post, an arcuate projection on the horizontally swinging arm, said projection having a slot therein, and means on the vertically swinging arm to engage the projection to prevent the swinging of the arm and adapted to fit in the slot so the arm can swing.
4. In a traific gate, a post, a pair'ofarms, each arm pivoted at one end to the post, and cooperating means on the arms to limit their swinging movements and adapted when either arm is in certain positions to prevent the other arm from swinging, said means including anarcuate projection forming a stop engaging surface having at one end a stop and at the. other end a notch and a stop, and a stop adapted to engage the surface or fit into said notch. i
5. In a traffic gate, a post, a pair of rollers on the post, av sleeve supported on the rollers, for rotation around the post, an arm on the sleeve, a second arm pivoted at one end to the post, and cooperating means for preventing the movement of one arm when the other-is in certain positions.
6. In a traffic gate, apost, a pair of rollers on the'post, a sleeve supported on the rollers for rotation around the post, a second sleeve having a lateral projection, said projection being pivoted to the upper end of the post whereby the second sleeve has a rocking movement, and means on the first sleeve and the lateral projectionto prevent the movement of one sleeve when the other sleeve is in certain positions. I
7. In a traffic gate, a post, a pair of rollers on thepost, a sleeve supported on the rollers for rotation around the post, an arcuate projection extending upwardly from the sleeve, said projection having a stopsurface with a stop at one end and a stop and notch at the other end, and a second sleeve having a lateral projection, said projection being pivoted at one side to the upper end of the post and having on its other side a stop to engage said projection surface or fit in the notch whereby the movements of the sleeves are controlled.
8. In a traffic gate, in combination with a base having a post receiving hole, a post adapted to be placed in said-hole, a sleeve rotatably supported on the post, a second sleeve pivoted on top of the post for a vertical swinging movement, and
interlocking means on thesleeves whereby one sleeve is locked against movement when the other is in certain positions.
9. In a traffic gate, a post having a pair of ears on its upper end and a slot intersecting the space between the ears, a sleeve having on one side a laterally extending disc pivoted between the ears, a socket member pivoted to the post, and an arcuate arm extending from the socket member through the slot, the arcuate arm and the 1 disc, each having a notch through which one may move when the other is in a certain position.
10. In a trailic gate, a post, a pair of vertically swinging arms on the post, and cooperating means on said arms adapted when the arms are in horizontal positions to permit the upward swing of either arm but adapted to prevent the upward swinging movement of either arm when the other has been swung upwardly, said means including i a disc on one arm and an arcuate arm on the other arm, said arcuate arm extending through the post.
11. In a traffic gate, a post, a pair of vertically
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US584854A US1933244A (en) | 1932-01-05 | 1932-01-05 | School traffic gate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US584854A US1933244A (en) | 1932-01-05 | 1932-01-05 | School traffic gate |
Publications (1)
Publication Number | Publication Date |
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US1933244A true US1933244A (en) | 1933-10-31 |
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ID=24339056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US584854A Expired - Lifetime US1933244A (en) | 1932-01-05 | 1932-01-05 | School traffic gate |
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US (1) | US1933244A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2578848A (en) * | 1948-04-20 | 1951-12-18 | Daniel R Shirley | Keeper mechanism |
US2616195A (en) * | 1949-01-10 | 1952-11-04 | Stafford John Conrad | Traffic gate |
US2731744A (en) * | 1952-08-25 | 1956-01-24 | Schnell Aaron Lloyd | Flexible bar type bump gate |
US3135062A (en) * | 1962-07-12 | 1964-06-02 | Child Traffic Control Co | School crossing gate |
US6234105B1 (en) * | 1997-06-09 | 2001-05-22 | Transpec, Inc. | Crossing arm assembly |
US10208440B1 (en) | 2015-09-09 | 2019-02-19 | Safe Rack Llc | Traffic gate |
-
1932
- 1932-01-05 US US584854A patent/US1933244A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2578848A (en) * | 1948-04-20 | 1951-12-18 | Daniel R Shirley | Keeper mechanism |
US2616195A (en) * | 1949-01-10 | 1952-11-04 | Stafford John Conrad | Traffic gate |
US2731744A (en) * | 1952-08-25 | 1956-01-24 | Schnell Aaron Lloyd | Flexible bar type bump gate |
US3135062A (en) * | 1962-07-12 | 1964-06-02 | Child Traffic Control Co | School crossing gate |
US6234105B1 (en) * | 1997-06-09 | 2001-05-22 | Transpec, Inc. | Crossing arm assembly |
US6477978B2 (en) | 1997-06-09 | 2002-11-12 | Transpec, Inc. | Crossing arm assembly |
US10208440B1 (en) | 2015-09-09 | 2019-02-19 | Safe Rack Llc | Traffic gate |
US10689816B1 (en) | 2015-09-09 | 2020-06-23 | Safe Rack Llc | Traffic gate |
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