US2173370A - Signal control - Google Patents

Description

SePf- 19, 1939- J, R. PARACHEK '2,173,370

S IGNAL CONTROL F'led Dec. 28, 1957 jaw Patented Sept. 19, 1939 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to remote control of audible or visible signals, especially as interconnection between fluid and electric transmissions.

5 This invention has utility as a warning for station or window attendants as at automobile service or lling stations and clerks at ticket, cash, or other types o windows or counters.

Referring to the drawing:

10 Fig. 1 is a view, with parts broken away, Showing an embodiment of the invention adapted for response hereunder say as crossed by a motor vehicle;

Fig. 2 is a plan view of the transmission box o connection device of Fig. l;

Fig. 3 is a section on the line III-III, Fig. 1, showing the box in end elevation;

Fig. 4 is a side elevation of an enlarged scale from the showing in Fig. 1 with the protective cover removed;

Fig. 5 is a section on the line V-V, Fig. 3, showing the device in switch closing position, thereby departing from the open position showing in Fig. 4;

Fig. 6 is a section on the line VI-VI, Fig. 4, showing the adjustable fluid terminal of the switch device;

Fig. 7 is a section on the line VII-VII, Fig. 4, of the electrical connection to the carrier for the operating lever of the switch device; and

Fig. 8 is a view of an embodiment of the invention as a cashiers window signal.

Along driveway I adjacent the service portion of a lling station, there may extend tube 2, say oi rubber, normally retaining its form, but as compressed by motor vehicle wheels thereover conducting a puff of such air along the tube as through the station wall 3 to tting 4 as protected from the weather.

This fitting 4 is shown as into insulation block 5to chamber 6 terminating in plug 1 having small port 8 upwardly therefrom. This transit of a vehicle over the compressible duct or tube 2 causes a puff of air out of the port 8 to thrust cap 9 away from closed position. This puff, in shifting the cap 9, moves such cap with lever I upon which it is mounted. This lever III has fulcrum II in conductor stem I2 rising from the insulation block 5. This conductor stem I2 is connected with block I 3 having terminal I4 therefrom extending by line I to energy source I6. From the opposite' side of this energy source I6 extend conductor line I'I to signal, herein shown as audible or bell device I8, located in a place to be heard or observed about the lling station. The circuit from this signal device I8 is completed by line I9 to terminal 20 extending into the block 5 to conductor member 2 I, to which threaded portion 22 of cup 23 extends for adjusting its position (Cl T200-81) in carrying conductor iluid as mercury 24 therein. This adjustment determines nicely the position which the cap 9 may be in for closed position at the port 8 and pin 25 in the remote end of the lever IIJ clear of the mercury 24 in cup 23.

Accordingly, in this thrusting upward of the cap 9 clear of the port 8 the opposite end of the lever I0 is thrust downwardly to carry the terminal pin 25 into the mercury terminal 24 in completing the circuit and thereby operating the signal I8. This circuit-completing position is effected by the movement of the pin and dissipation of its momentum at its striking the mercury. There is, accordingly, a time interval effectiveness for holding this circuit closed in operating the signal I8, notwithstanding there may be rapid transit of the vehicle in its compression of the tube 2. This mercury switch is one which is of low resistance and effective for circuit closing and opening response without material depreciation over an extended period of time.

In completing this set-up, screws 26 in the block 6 may mount angle bracket 2l so that additional Screws 28 may position this bracket on a Station wall or elsewhere as desired. To avoid impact or tampering with this control for the signal, cap 29 may be assembled as a housing thereover by screw 30 engaging in the lever support or the stem I2. This pressure response through the compressible duct 2 may be effected from mat 3l, say in position adjacent tellers window 32 in a bank or other place where a clerk may have other matters requiring attention and wish to be apprised or warned as someone appears.

The fluid transmission response at the compressing oi the duct 2, even though a slight or minor pui, may rock this sensitive lever device and eiect switch closing for electrical transmission to the closed circuit in sensitive response thereto, which may be visible signal 33 (Fig. 8) or audible signal I8 (Fig, 1).

What is claimed and it is desired to secure by Letters Patent is:

For an electric signal circuit having a pair of terminals, an insulation block base providing spaced mounting for said terminals, and additionally a .duct insulation pedestal port, a lever having fulcrum mounting on one of said terminals, a mercury cup on the other terminal, a contact carried by the lever for swinging into and out of circuit closing position as to the mercury cup, a housing for the lever, terminals and port providing a common chamber thereover, a cap for the port also carried by the lever, and pneumatic fluid disturbance supply means to act on the cap which intercepts ow from the port into said chamber for effecting shifting of the lever.

JOSEPH R. PARACHEK.

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