US956992A - Frogless switch. - Google Patents
Frogless switch. Download PDFInfo
- Publication number
- US956992A US956992A US51921709A US1909519217A US956992A US 956992 A US956992 A US 956992A US 51921709 A US51921709 A US 51921709A US 1909519217 A US1909519217 A US 1909519217A US 956992 A US956992 A US 956992A
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- Prior art keywords
- tongue
- rail
- switch
- switch tongue
- wedge
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- 238000010276 construction Methods 0.000 description 4
- BFPSDSIWYFKGBC-UHFFFAOYSA-N chlorotrianisene Chemical compound C1=CC(OC)=CC=C1C(Cl)=C(C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 BFPSDSIWYFKGBC-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000543381 Cliftonia monophylla Species 0.000 description 1
- 241000871495 Heeria argentea Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 101150012763 endA gene Proteins 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/10—Frogs
- E01B7/14—Frogs with movable parts
Definitions
- switch tongue shall be held down to Aand also to provide a switch tongue which .and the switch tongue are integral with each also provide braces to insure that the switch A.roH'NV J. NEWMAN, or Rocxwoon, PENNSYLVANIA.
- This invention relates to certain new and useful improvements in railway7 switches, and more particularly to that class of rail-
- the present invention has for its objects among others to provide an improved dcvice of this general character which shall obviate the objections to prior constructions of this nature, and to provide means whereits proper place when in operative position,
- I provide a wedge carried by the switch tongue to prevent the'rail from being shoved over by pressure thereon.
- the top surface of the switch tongue and the top surface of the stub rail are preferably easelmrdened at their adjacent ends; so also is the upper tace of the main rail over which the switch tongue moves to increase the life of these parts where the greatest wear comes.
- I provide a plate to connect the lead rail with the side track inner rai] so as to make a continuous rail and provide the greatest amount of rigidity where such is required.
- I provide a novel form of joint between the switch tongue and the adjacent rail and tongue shall be thrown to its proper place even if it has become sprung from any cause.
- the switch tongue is raised about two and three-quarters of an inch, the ends of the ad ⁇ jacent rails being gradually raised to meet this elevation, so as to insure against breakage and allow of the flange of the wheel being at all times elevated from and outof contact with the tread of the main rail at this point.
- the outside switch rail is raised correspondingly.
- the invention in ⁇ its preferred form, is
- F ig. 3 is aperspective view, on an enlarged scale, showing the switch tongue and adjacent parts.
- Fig. -1 is a horizontal longitudinal section through the parts at the joint, showing also the wedge on the switch tongue.
- Fig. 5 is a perspective view of the switch tongue.
- Fig. (5 is a perspective view of the coperating parts of the joint.
- Fig. 7 is a detail showing the means for holding down the end of the switch tongue.
- l and 2 desi@- nate the main track rails and 3 the outside vor stationary siding rail, these being of usual construction, except as hereinafter specified.
- the main track rail 2 is unbrclen or continuous at the point of crossing, and for a portion ofl its length, for a greater or less distance at the point where the switch rail movesover the same, has its upper or tread surface case hardened, as shown at 4 in Fig. 3, so as to increase the rise thereof and enable it to better sustain the wear to which it is subjected.
- the rails are suitably braced and secured to the ties in any of the Wellknown ways. I
- brace 5 is a brace located at a. point somewhat near the free end of the switch tongue, being secured to a tie or to an additional or supplemental supporting member 6, the said brace having a lip or tongue portion '7 extending inwardly between the base and tread of the rail, as seen clearly in Fig. 3, so as to better brace the rail and securely hold it against displacement.
- the upper face of this brace is rounded, as seen at 8, for contact therewith of the under face of the' switch tongue, as the latter is moved so as to insure its being thrown to proper position even should the switch tongue become sprung from any cause.
- 9 is an additional riser brace having rounded upper surface for the same purpose, this latter brace being disposed near the free end of the switch tongue as seen clearly in Fig. 3.
- These braces o and 9 have their rounded port-ions above the tread of the rail, as seen clearly in Fig. 3, so as to insure the switch tongue be- ⁇ ing thrown to proper position at. all times i the inner side track rail
- the switch tongue 15 and rail portion 18 1 are integral and the switch tongue near its free end is provided with a lateral projection 19 below the upper surface thereof, as
- E70 is a brace having an overlapping flange 21 beneath which the projection 19 of the switch tongue is adapted to engage when the switch tongue is moved into its operative position, as seen in Figs. 43 and 7. This serves to preventupward rising of the tongue after titi: latter has been moved into its operative posivtion over the main track rail 2.
- the switch tongue is pivotally connected with the adjacent end of the rail 1l and, while this connection may be of any suitable forni of construction, I have shown in the 'present instance what I consider the preferable means of forming this connection.
- lt comprises a plate 22 securely bolted to one side of the rail portion of the switch tongue, said plaie having a central longitudinal projecting pci-tion 23 which extends beyond the end of the rail portion, as seen clearly in Fig.
- a plate 25 Upon the opposite side of this end portion of the switch tongue and secured preferably by the same bolts Q4 that secure the plate 22 in position, is a plate 25 having its portion extended beyond the end of the switch tongue i'ail bifurcated to form the arms 26 and 27, as seen best in Fig. 5. These arms are provided near their free ends with the openings 28 for a purpose which will soon be described.
- FIG. 29 is a block 0r plate secured to the rail 11 by suitable means as bolts 30, while upon the opposite side are the upper and lower arms I l and which project beyond the end of the rail, as seen best in Fig. (3, the same being secured to the end of the rail b v the bolts ⁇ v30, seen clearly in Fig. 4.
- the plate 2t) has a central longitudinal extension 33 having a vertical opening 34, and when the parts are assembled in juxtaposed position. a pivot bolt 35 is passed vertically through the openings :'28 and 34 of the arms QG and 2 and the extension 3? respectively, the switch tongue turning upon said pivot bolt.
- the tongue is thrown into operative position, the intel-engaging parts 3l and and 33 and 2() and 27 torni an exceedingly strong and etlicient means of connection between the parts and one that serves to prevent undue lateral strain or breakage of the parts.
- this wedge 36 is a wedge secured tol the tace of the switch tongue rail adjacent the inner rail of the main track, and this wedge is provided with the central longitudinal ribv 3T which is adapted to engage the space between the base and tread of the rail and to Contact, with the web thereof. "hen the switch tongue is in operative position, this wedge serves to tightly till the space between the converging ends or portions of the side tongue and adjacent rail and serves further to brace the switch tongue and prevent its being pushed to an abnormal position in use.
- the switch tongue and the movable switch rails may be moved in any of the conventional waj's, but, as this forms no part of the present invention. a detail description there- A ot' does not seein necessary.
- l have shown an operating lever 38 connected by rod 3U with the bell crank lever 40, which, in turn, actuates thc transverse member l1 connected with the movable point rail 42.
- the bell crank lever 43 which, in turn, is connected by the rod 4l with the bell crank lever 45 connected with and designed to operate the transverse sliding member 46, to which is firmly secured a brace 4T having the vertical flange 4S secured to the switch tongue rail adjacent its pivot, so as to give the requisite strength at this point.
- the switch point moves over the tread of the main track rail 2, which is continuous at the point of crossing and which is firmly secured to the strengthening base plate 10.
- the base and l a switch tongue, a siding rail, and a plate web of the rail portion of the switch tongue are beveled and tapered, as seen at 49 and 50 respectively.
- IVhat is claimed as new is 1.
- the niain track rail In a railway switch, the niain track rail,
- switch tongue being provided with a vertical faced wedge extended laterally beyond the edge of the tongue.
- a switch tongue provided with a vertical faced wedge extended laterally beyond the edge of the tongue to eiigagethe adjacent rail to prevent lateral movement of the switch tongue.
- a switch tongue and rail in one piece with unbroken upper surface. the base and web of the rail portion thereof being beveled and tapered, and a wedge carried bv the side of .said tongue and projected laterally beyond the edgeV thereof.
- a switch tongue and rail in one piece with unbroken upper surface, the base and web of the rail portion thereof being beveled and tapered, and a wedge carried by the side of said tongue and projected laterally beyond the edge thereof, the upper surface of the switch tongue adjacent its free end being case hardened.
- a switch tongue having a lateral lip, and a brace having a rounded portion extended above the tread .A of the rail for engagement by the switch tongue to insure the latter being thrown to position.
- a switch tongue and rail in one integral piece with unbroken upper surface from its joint to its free end, and a vertical faced wedge carried by the side of said tongue. and projecting laterally beyond the side of said tongue.
- aswitch tongue and rail in one integral piece with vunbroken upper surface from its joint to its free end, and a wedge carried by the side of said tongue and projecting laterally beyond the side of said touffue, combined with an outside switch rail, said switch rail and switch tongue both being elevated to clear the tiange of the wheel from the main rail.
- a switch tongue and rail in one integral piece, a wedge on tne side of the tongue projected laterally beyond the side thereof, and a laterally projecting lip adjacent the free end of the tongue.
- a switch tongue and rail in one integral piece, a wedge on the side of the tongue projected laterally beyond the side thereof, and a laterally projecting lip adjacent, the free end of the tongue and disposed at a distance from the upper face thereof.
- a switch tongue and rail in one integral piece with unbroken upper surface from its joint to its free end, and a vertical faced wedge carried by the side of said tongue and projecting laterally beyond the side of said tongue, combined with an outside switch rail, said switch rail and switch tongue both being elevated to clear the flange of tlie-wheel from the main rail, and joint members extended beyond the end of said tongue.v
- a switch tongue and rail in one integral piece, a wedge on the side of the tongue projected laterally beyond the side thereof, a laterally projecting lip adjacent the ree end of the tongue, and joint members extended beyond the end of said tongue.
- a joint member comprising interengaging members on one side of the switch tongue with a pivot connecting the saine at their overlapped points, and interengaging portions upon the opposite side of the tongue, the latter being free and disconnected troni each other and separable as the tongue isv moved on its pivot.
- a mil having upon one Side a ]o1nt member withm ⁇ the length of theY rail, spaced members on the opposite side of the rail extending beyond the end of the raul and n switch tongue having; coperatmg separated Joint members upon opposite Sides and extended beyond the endA of said tongue.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Description
J. J, NEWMAN.
FROGLESS SWITCH. LPPLICATIOS Hmm 539123, 1909.
Patented May 3, 1910.
2 SHEETS-SHEET 1.
-m1 il@ I,
Patented May 3, 1910.v
1 summa-amm s.
J. J. NEWMAN,
rRoGLsss swIToH.
n APPLICATION IILBD SEPT. 23, 1909.
31 u m1 loz mmm@ lmhwogi;
Y way switches known as rogless switches.
by the switch tongue shall be held down to Aand also to provide a switch tongue which .and the switch tongue are integral with each also provide braces to insure that the switch A.roH'NV J. NEWMAN, or Rocxwoon, PENNSYLVANIA.
FROGLESS SWITCH.
Specification of Letters Patent. Patented May 3, 1910.
Application filed September 23, 1909. Serial No. 519,217.
To all whom 'it may concern:
Beit known that I, JOHN J. NEwMAN, a citizen of the United States of America, and resident of Rockwood, in the county of Somerset and State of Pennsylvania, have invented certain new and useful Improvements in Frogless Switches, of which the following is a specification.
This invention relates to certain new and useful improvements in railway7 switches, and more particularly to that class of rail- The present invention has for its objects among others to provide an improved dcvice of this general character which shall obviate the objections to prior constructions of this nature, and to provide means whereits proper place when in operative position,
shall have no joint, projection bolt-head or the like upon its upper surface. The rail other.
I provide a wedge carried by the switch tongue to prevent the'rail from being shoved over by pressure thereon. The top surface of the switch tongue and the top surface of the stub rail are preferably easelmrdened at their adjacent ends; so also is the upper tace of the main rail over which the switch tongue moves to increase the life of these parts where the greatest wear comes.
I provide a plate to connect the lead rail with the side track inner rai] so as to make a continuous rail and provide the greatest amount of rigidity where such is required.
I provide a novel form of joint between the switch tongue and the adjacent rail and tongue shall be thrown to its proper place even if it has become sprung from any cause.
The switch tongue is raised about two and three-quarters of an inch, the ends of the ad` jacent rails being gradually raised to meet this elevation, so as to insure against breakage and allow of the flange of the wheel being at all times elevated from and outof contact with the tread of the main rail at this point. The outside switch rail is raised correspondingly.
Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.
The invention, in `its preferred form, is
the parts in their other position. F ig. 3 is aperspective view, on an enlarged scale, showing the switch tongue and adjacent parts. Fig. -1 is a horizontal longitudinal section through the parts at the joint, showing also the wedge on the switch tongue. Fig. 5 is a perspective view of the switch tongue. Fig. (5 is a perspective view of the coperating parts of the joint. Fig. 7 is a detail showing the means for holding down the end of the switch tongue.
Like numerals of reference indicate like parts throughout the several views.
Referring to the drawings, l and 2 desi@- nate the main track rails and 3 the outside vor stationary siding rail, these being of usual construction, except as hereinafter specified. The main track rail 2 is unbrclen or continuous at the point of crossing, and for a portion ofl its length, for a greater or less distance at the point where the switch rail movesover the same, has its upper or tread surface case hardened, as shown at 4 in Fig. 3, so as to increase the rise thereof and enable it to better sustain the wear to which it is subjected. The rails are suitably braced and secured to the ties in any of the Wellknown ways. I
5 is a brace located at a. point somewhat near the free end of the switch tongue, being secured to a tie or to an additional or supplemental supporting member 6, the said brace having a lip or tongue portion '7 extending inwardly between the base and tread of the rail, as seen clearly in Fig. 3, so as to better brace the rail and securely hold it against displacement. The upper face of this brace is rounded, as seen at 8, for contact therewith of the under face of the' switch tongue, as the latter is moved so as to insure its being thrown to proper position even should the switch tongue become sprung from any cause. 9 is an additional riser brace having rounded upper surface for the same purpose, this latter brace being disposed near the free end of the switch tongue as seen clearly in Fig. 3. These braces o and 9 have their rounded port-ions above the tread of the rail, as seen clearly in Fig. 3, so as to insure the switch tongue be- `ing thrown to proper position at. all times i the inner side track rail.
regardless of whether it be sprung or not.
is a metallic plate of requisite thickness to give the required rigidity. It is firmly seswitch tongue being elevated above the tread of the main t ack rail 2 over which it moves, about, inches so as to 1nsnre yagainst brealmge and allow of the passage of the flange of the wheel without contact with the main track rail 2 at the point of crossine the same. The top surface of the flee end or the switch tongue is ease hardened, as shown at 1G in Fig. and the adjacent end of the lead rail 12 is correspondinglv case hardened,
` as shown at 1T, in said Fig. 3, for the` same purpose as the case hardening ot' the top surface of the main track rail 2 as above described. Y
The switch tongue 15 and rail portion 18 1 are integral and the switch tongue near its free end is provided with a lateral projection 19 below the upper surface thereof, as
seen clearly in Figs. and 7, while E70 is a brace having an overlapping flange 21 beneath which the projection 19 of the switch tongue is adapted to engage when the switch tongue is moved into its operative position, as seen in Figs. 43 and 7. This serves to preventupward rising of the tongue after titi: latter has been moved into its operative posivtion over the main track rail 2.
The switch tongue is pivotally connected with the adjacent end of the rail 1l and, while this connection may be of any suitable forni of construction, I have shown in the 'present instance what I consider the preferable means of forming this connection. lt comprises a plate 22 securely bolted to one side of the rail portion of the switch tongue, said plaie having a central longitudinal projecting pci-tion 23 which extends beyond the end of the rail portion, as seen clearly in Fig. Upon the opposite side of this end portion of the switch tongue and secured preferably by the same bolts Q4 that secure the plate 22 in position, is a plate 25 having its portion extended beyond the end of the switch tongue i'ail bifurcated to form the arms 26 and 27, as seen best in Fig. 5. These arms are provided near their free ends with the openings 28 for a purpose which will soon be described.
29 is a block 0r plate secured to the rail 11 by suitable means as bolts 30, while upon the opposite side are the upper and lower arms I l and which project beyond the end of the rail, as seen best in Fig. (3, the same being secured to the end of the rail b v the bolts` v30, seen clearly in Fig. 4. The plate 2t) has a central longitudinal extension 33 having a vertical opening 34, and when the parts are assembled in juxtaposed position. a pivot bolt 35 is passed vertically through the openings :'28 and 34 of the arms QG and 2 and the extension 3? respectively, the switch tongue turning upon said pivot bolt. lVhen the tongue is thrown into operative position, the intel-engaging parts 3l and and 33 and 2() and 27 torni an exceedingly strong and etlicient means of connection between the parts and one that serves to prevent undue lateral strain or breakage of the parts.
36 is a wedge secured tol the tace of the switch tongue rail adjacent the inner rail of the main track, and this wedge is provided with the central longitudinal ribv 3T which is adapted to engage the space between the base and tread of the rail and to Contact, with the web thereof. "hen the switch tongue is in operative position, this wedge serves to tightly till the space between the converging ends or portions of the side tongue and adjacent rail and serves further to brace the switch tongue and prevent its being pushed to an abnormal position in use. v
The switch tongue and the movable switch rails may be moved in any of the conventional waj's, but, as this forms no part of the present invention. a detail description there- A ot' does not seein necessary. In the present instance. l have shown an operating lever 38 connected by rod 3U with the bell crank lever 40, which, in turn, actuates thc transverse member l1 connected with the movable point rail 42. and operatively connected with the member l1 is the bell crank lever 43 which, in turn, is connected by the rod 4l with the bell crank lever 45 connected with and designed to operate the transverse sliding member 46, to which is firmly secured a brace 4T having the vertical flange 4S secured to the switch tongue rail adjacent its pivot, so as to give the requisite strength at this point.
The parts not herein specifically meutioned are, it is to be understood, of any of the conventional forms, or the improvements as hereinafter set forth in the claims may be used in conjunction with any well-known or approved forms of said parts. The outsidev switch rail should be raised to correspond to the elevation of the switch tongue at the point mentioned, for obvious reasons.
It, is to be noted that the switch point moves over the tread of the main track rail 2, which is continuous at the point of crossing and which is firmly secured to the strengthening base plate 10. The base and l a switch tongue, a siding rail, and a plate web of the rail portion of the switch tongue are beveled and tapered, as seen at 49 and 50 respectively.
From the above, it will be seen that I have devised a very simple, yet eftieient, strong, durable and reliable frogless switch, and, while the structural embodiment of the invention as herein disclosed is what I at thc present time consider preferable, it is evidentthat the saine is subject to changes, variations and modifications in the proportions, relative arrangement and details, and I. therefore, do not wish to be restricted to the particular construction herein disclosed, but reserve the right to make such changes, variations and modifications as come properly within the scope of the protection prayed.
IVhat is claimed as new is 1. In a railway switch, the niain track rail,
extending beneath the two and secured to the saine to give rigidity thereto, said plate extending diagonally and beyond the joint between the switch tongue and the inner side track rail, s: d switch tongue being provided with a vertical faced wedge extended laterally beyond the edge of the tongue.
2. In a railway switch, the iiiain track i'ail, the siding rail, a svitch tongue, a rail integral therewith, and a plate extending beneath the saine and disposed diagonally with one end beyond the joint between the switch tongue and the inner side track rail, said switch tongue being provided with a vertical fac-ed wedge extended laterally beyond the ledge of the tongue.
8. In a railway switch, a switch tongue provided with a vertical faced wedge extended laterally beyond the edge of the tongue to eiigagethe adjacent rail to prevent lateral movement of the switch tongue.
et. In a railway switch, a switch tongue and rail in one piece and a vertical fac-ed ywedge carried by the tongue and projected laterally beyond the side thereof to engage the adjacent rail to prevent laterin iiiovenient of the switch tongue.
In a railway switch. a switch tongue and rail in one piece with unbroken upper surface. the base and web of the rail portion thereof being beveled and tapered, and a wedge carried bv the side of .said tongue and projected laterally beyond the edgeV thereof.
6. In a railway switch, a switch tongue and rail in one piece with unbroken upper surface, the base and web of the rail portion thereof being beveled and tapered, and a wedge carried by the side of said tongue and projected laterally beyond the edge thereof, the upper surface of the switch tongue adjacent its free end being case hardened.
7. In a railway switch, a switch tongue having a lateral lip, and a brace having a rounded portion extended above the tread .A of the rail for engagement by the switch tongue to insure the latter being thrown to position.
t). In a railway switch, a switch tongue and rail in one integral piece with unbroken upper surface from its joint to its free end, and a vertical faced wedge carried by the side of said tongue. and projecting laterally beyond the side of said tongue.
10. In a railway switch, aswitch tongue and rail in one integral piece with vunbroken upper surface from its joint to its free end, and a wedge carried by the side of said tongue and projecting laterally beyond the side of said touffue, combined with an outside switch rail, said switch rail and switch tongue both being elevated to clear the tiange of the wheel from the main rail.
11. In a railway switch, a switch tongue and rail in one integral piece, a wedge on tne side of the tongue projected laterally beyond the side thereof, and a laterally projecting lip adjacent the free end of the tongue.
12. In a railway switch, a switch tongue and rail in one integral piece, a wedge on the side of the tongue projected laterally beyond the side thereof, and a laterally projecting lip adjacent, the free end of the tongue and disposed at a distance from the upper face thereof.
13. In a railway switch, a switch tongue and rail in one integral piece with unbroken upper surface from its joint to its free end, and a vertical faced wedge carried by the side of said tongue and projecting laterally beyond the side of said tongue, combined with an outside switch rail, said switch rail and switch tongue both being elevated to clear the flange of tlie-wheel from the main rail, and joint members extended beyond the end of said tongue.v
14. In a railway switch, a switch tongue and rail in one integral piece, a wedge on the side of the tongue projected laterally beyond the side thereof, a laterally projecting lip adjacent the ree end of the tongue, and joint members extended beyond the end of said tongue.
15. In a railway switch, a joint member comprising interengaging members on one side of the switch tongue with a pivot connecting the saine at their overlapped points, and interengaging portions upon the opposite side of the tongue, the latter being free and disconnected troni each other and separable as the tongue isv moved on its pivot.
16. In a railway switch, a mil having upon one Side a ]o1nt member withm `the length of theY rail, spaced members on the opposite side of the rail extending beyond the end of the raul and n switch tongue having; coperatmg separated Joint members upon opposite Sides and extended beyond the endA of said tongue. Y
1?."In a rniiway swltch, a rml having upon one 51de a-]omt member Within the length of the rail. spaced members on the opposite side of the rail extending beyond the end of the ruil, fr switch tongue having cooperating separated joint members upon opposite sides and extended beyond the end of said tongue, and a wedge on the side of September 1909.
J CHN J. NEWMAN.
Vitnesses: Fie-:NK A. IIOLBERT, CEAS. H. EALY.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51921709A US956992A (en) | 1909-09-23 | 1909-09-23 | Frogless switch. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51921709A US956992A (en) | 1909-09-23 | 1909-09-23 | Frogless switch. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US956992A true US956992A (en) | 1910-05-03 |
Family
ID=3025395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US51921709A Expired - Lifetime US956992A (en) | 1909-09-23 | 1909-09-23 | Frogless switch. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US956992A (en) |
-
1909
- 1909-09-23 US US51921709A patent/US956992A/en not_active Expired - Lifetime
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