US112242A - Improvement in electro-magnetic signal apparatus - Google Patents
Improvement in electro-magnetic signal apparatus Download PDFInfo
- Publication number
- US112242A US112242A US112242DA US112242A US 112242 A US112242 A US 112242A US 112242D A US112242D A US 112242DA US 112242 A US112242 A US 112242A
- Authority
- US
- United States
- Prior art keywords
- magnet
- helix
- electro
- improvement
- magnetic signal
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002441 reversible Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/565—Vacuum systems indirect, i.e. vacuum booster units characterised by being associated with master cylinders, e.g. integrally formed
Definitions
- This invention is an improvement in the electrical apparatus employed in connection with hotel indicators and for other purposes, and consists in the combination ofa fixed helix and a movable permanent magnet, as hereinafter described, whereby the position of the magnet, and of a signal connected therewith,
- the electric current sent through one of them causes it to attract the bar and move it from its position, and to reverse the movement of the bar the current must be changed to the other helix.
- A a bent steel magnet, suspended from a pivot, b, so as to bestride the coil, as shown in fig. 2.
- the magnet By sending the electric current in one direction through the coil the magnet will be deflected so that one of its poles will rest against the side of thehclix, as shown at 0, while by changing the direction of the current the other pole of the magnet will be attracted to the helix, as seen in dotted lines at i.
- bent magnet embracing the helix is believed to be the best form, for the reason that as thus constructed the current acts on both of the poles at once, and thereby with increased force, and also for the reason that the helix itself forms a stop which limits the movementof the magnet and keeps it within reach of the influence of thecnrrents- 'Any permanently magnetized har may, however, be
- the drawing illustrates the practical application of the apparatus to a hotel indicator; m being a signal attached to the magnet or pivot, so as to move when the latter-moves; and a; being the face of the box orcase through which, byf'ineans of suitable aperture, v, the signal maybe seen.”
- bent arms of the magnet may be weighted, or suitable springs can be applied to the rod that connects the magnet to the signal, so that when no current passes through the coil the signal will automatically assume the vertical intermediate position shown in dotted lines at s s in fig. 2.
Description
A. HAHL. ELECTROMAGNETIC SIGNAL APPARATUS.
No. 112,242. Patented Feb. 28, 1871.
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AUGUSTUS HAHL, OF WASHINGTON,.DISTRICT OF COLUMBIA, ASSIGNOR' TO THE ELECTRIC CLOCK AND BELL COMPANY, OF SAMEPLACE.
Letters Patent No. 112,242, dated February 28,1871.
lMPROVEMENT lN ELECTRO-MAGNETIC SIGNAL APPARATUS.
The Schedule referred to in these Letter! Patent and maklngpazt oi the lame.
To all whom it may concern Be it known that I, AUGUSTUS HAHL, of \Vashington, in the District of Columbia, have invented certain Improvements in Electrical Apparatus; and I declare thefollowing to be a full, clear, and exact description thereof, reference being bad to the accordpanying drawing, in'which-- Figure 1 is aside elevation and Figure 2 is a vertical section in line a: x of fig. 1.
Similar letters of reference indicate like parts.
This invention is an improvement in the electrical apparatus employed in connection with hotel indicators and for other purposes, and consists in the combination ofa fixed helix and a movable permanent magnet, as hereinafter described, whereby the position of the magnet, and of a signal connected therewith,
be reversed at pleasure by simply reversing the electric current, without necessity fora second helix.
frln all apparatus for a similar purpose heretofore in .l i'ise two helices have been employed, with an iron bar suspended between them and capable of moving toward either.
The electric current sent through one of them causes it to attract the bar and move it from its position, and to reverse the movement of the bar the current must be changed to the other helix.
In my apparatus, although only a single helix is employed, yet the bar may be swungto either side by'thedirect force of the electric current.
In the drawing- 0 represents the helix, and
A, a bent steel magnet, suspended from a pivot, b, so as to bestride the coil, as shown in fig. 2.
By sending the electric current in one direction through the coil the magnet will be deflected so that one of its poles will rest against the side of thehclix, as shown at 0, while by changing the direction of the current the other pole of the magnet will be attracted to the helix, as seen in dotted lines at i.
The bent magnet embracing the helix is believed to be the best form, for the reason that as thus constructed the current acts on both of the poles at once, and thereby with increased force, and also for the reason that the helix itself forms a stop which limits the movementof the magnet and keeps it within reach of the influence of thecnrrents- 'Any permanently magnetized har may, however, be
employed instead of the curved bar, and, when suspended at the side of the helix so that one pole shall be near it, will be alternately attracted and repelledas the current is sent in one direction or the other.
The drawing illustrates the practical application of the apparatus to a hotel indicator; m being a signal attached to the magnet or pivot, so as to move when the latter-moves; and a; being the face of the box orcase through which, byf'ineans of suitable aperture, v, the signal maybe seen."
If desired the bent arms of the magnet may be weighted, or suitable springs can be applied to the rod that connects the magnet to the signal, so that when no current passes through the coil the signal will automatically assume the vertical intermediate position shown in dotted lines at s s in fig. 2.
Similar springs or weights might,if preferred, be employed instead of the reversed electric current, foi'\ the purpose of reversing the position of the nagne't and signal.-
I have referred to the helix as being fixed and the magnet as being movable, but, if the magnet was fixed and the helix movable I regard it as the mechanical equivalent thereof and as equally embraced in my invcnti0n.-
I am aware that for the purpose of philosophical I experiments movable permanent magnets have been brought into connection with fixed coils inthe manner herein described, so that byieversing the current one of them might be caused to swing in one direction or the other, but I am not aware that any application of this principle has ever been made to the arts. 1 do not claim the principle, biit What I claim as my invention, and desire to secure by Letters Patent, is
The combination of amovable permanent magnet and a. fixed coil, arranged and operating as described, with a slotted or perforated plate or case, to, and a movable signal, m, as shown, whereby the reversal oi a single current is caused to reverse the position of the signal with relation to the apertureso in the plate or case, substantially as set forth and. or the purpose
Publications (1)
Publication Number | Publication Date |
---|---|
US112242A true US112242A (en) | 1871-02-28 |
Family
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Family Applications (1)
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US112242D Expired - Lifetime US112242A (en) | Improvement in electro-magnetic signal apparatus |
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- US US112242D patent/US112242A/en not_active Expired - Lifetime
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