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"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Silhouette

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Black and White

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Outline

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Silhouette

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Black and White

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Outline

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the right of a roadway feature or obstruction." "If used, the Keep Right sign should be installed as close as practical to approach ends of raised medians, parkways, islands, underpass piers, and at other locations where it is not readily apparent that traffic is required to keep to the right. The sign should be mounted on the face of or just in front of a pier or other obstruction separating opposite directions of traffic in the center of the highway such that traffic will have to pass to the right of the sign." -Federal Highway Administration, 2007

Keep Right, Silhouette

"The Keep Right sign may be used at locations where it is necessary for traffic to pass only to the…

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable location or in front of a school or other public building where a crossing is not designated." -Federal Highway Administration, 2007

No Pedestrian Crossing, Black and White

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable…

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable location or in front of a school or other public building where a crossing is not designated." -Federal Highway Administration, 2007

No Pedestrian Crossing, Color

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable…

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable location or in front of a school or other public building where a crossing is not designated." -Federal Highway Administration, 2007

No Pedestrian Crossing, Outline

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable…

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable location or in front of a school or other public building where a crossing is not designated." -Federal Highway Administration, 2007

No Pedestrian Crossing, Silhouette

"The No Pedestrian Crossing sign may be used to prohibit pedestrians from crossing a roadway at an undesirable…

"It (pen) should be held easily, in the position as illustrated, the strokes drawn with a steady, even motion and a slight uniform pressure on the paper, not enough to spread the nibs of the pen." —French, 1911

Side View of Position for Lettering Using Pen

"It (pen) should be held easily, in the position as illustrated, the strokes drawn with a steady, even…

"For the first practice draw in pencil top and bottom guide lines for 3/16" letters and with a 516 F or similar pen make directly in ink a series of vertical lines, drawing the pen down with a finger movement. This one stroke must be practised until the beginner can get lines vertical and of equal weight." —French, 1911

Top View of Position for Lettering Using Pen

"For the first practice draw in pencil top and bottom guide lines for 3/16" letters and with a 516 F…

This piece of furniture was designed to hold a mattress fixed with side swiveling wheels for easy mobility. This bedstead includes four vertical posts holding adjustable sleeves adapted to support a bed bottom frame.

A Perspective View of a Bedstead

This piece of furniture was designed to hold a mattress fixed with side swiveling wheels for easy mobility.…

This banjo has a rim with straining wires stretched across the head, held together by three adjustable screw pins. The end of the instrument has tuning pegs which are located at the end of the neck shaped after an oblique shape. The banjo shown is an instrument of the guitar family that has a long neck and circular body.

Rendered View of a Banjo

This banjo has a rim with straining wires stretched across the head, held together by three adjustable…

This gig mill uses a rotating drum head which carries a series of rotating napping roles. This machine is covered with wire teeth that teasel cloth.

Cloth Napping Machine used for Teaseling Woolen Cloth

This gig mill uses a rotating drum head which carries a series of rotating napping roles. This machine…

The body of this vehicle depicts an axle and shaft having a pivotal connection with said shafts on each side.

Side View of a Road Cart

The body of this vehicle depicts an axle and shaft having a pivotal connection with said shafts on each…

Depicting two six link chain designs. Item of personal adornment worn by a person.

Optional Two View Design of Watch Chains

Depicting two six link chain designs. Item of personal adornment worn by a person.

This vehicle brake is used to slow down a vehicle by converting its kinetic energy into heat. This basic system, used a brake lever, and road wheel brakes. The heat energy is then dissipated into the atmosphere.

Running Gear Vehicular Brake

This vehicle brake is used to slow down a vehicle by converting its kinetic energy into heat. This basic…

This lunch box has a main box surrounded by another box which is then divided into a series of compartments. The lunch box is a container meant to store a meal for consumption. The covers have flanged sides, the rest strips and the main lid are adapted to secure the front and side covers.

Flanged Opening Lunch Box

This lunch box has a main box surrounded by another box which is then divided into a series of compartments.…

This jug is a container for liquid. It has a narrow opening from which to pour or drink, featuring a hand from which to hold.

Top and Side View of a Jug

This jug is a container for liquid. It has a narrow opening from which to pour or drink, featuring a…

Depicts the described method of compelling circulation of the refrigerating agent consisting in a vacuum front, and a blast of air from the rear. The refrigerating process involves the vaporization of carbon bi sulfide in the presence of air and the separation of the two.

Refrigeration Apparatus

Depicts the described method of compelling circulation of the refrigerating agent consisting in a vacuum…

There were minor variations from one manufacturer to another, but most typewriters followed the concept that each key was attached to a type bar that had the corresponding letter molded. To have letters typed in exact location, the type bar was guided all its way till the ribbon by segment. When a key was struck briskly and firmly, the type bar hit an inked fabric stretched in front of a cylindrical platen that moved back and forth. The paper was rolled around by the typewriter's platen, which was then rotated by the "carriage return" lever into position for each new line of text

Type Writing Machine

There were minor variations from one manufacturer to another, but most typewriters followed the concept…

A furnace is a device used for heating. The furnace was most likely used for the manufacturing of ceramic objects. The heat energy used to fuel a furnace may be supplied directly by fuel combustion, by electricity such as the electric arc furnace, or through induction heating in induction furnaces.

Front for Hot Air Furnace

A furnace is a device used for heating. The furnace was most likely used for the manufacturing of ceramic…

A collapsible boat includes a skeleton and an impervious skin tensioned about the skeleton. The skeleton includes a plurality of longitudinal and transverse frame members forming stringers and former, the frame members being attached to the gunwale frame of the boat and the transverse members being turn able relative to the gunwale frame. The flexible skin is permanently attached to the gunwale frame and the longitudinal frame members are hinge connected to the gunwale frame at front and rear portions thereof. The longitudinal members are turn able relative to the gunwale frame in a direction transversely of the boat, and the longitudinal frame members along their horizontal portion each being provided with one or more hinge members turn able through an angle of 180°.

Collapsible Boat

A collapsible boat includes a skeleton and an impervious skin tensioned about the skeleton. The skeleton…

The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing ethylene glycol, to transfer pressure from the controlling unit, which is usually near the operator of the vehicle, to the actual brake mechanism, which is usually at or near the wheel of the vehicle. Within a hydraulic brake system, as the brake pedal is pressed/ brake lever is squeezed, a push rod exerts force on the piston(s) in the master cylinder causing fluid from the brake fluid reservoir to flow into a pressure chamber through a compensating port which results in an increase in the pressure of the entire hydraulic system. This forces fluid through the hydraulic lines toward one or more calipers where it acts upon one or two additional caliper pistons secured by one or more seated O-rings which prevent the escape of any fluid from around the piston.

Fluid Pressure Brake Apparatus

The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing…

Opera glasses, also known as theater binoculars or Galilean binoculars, they are compact, low power optical magnification devices, usually used at performance events, whose name is derived from traditional use at opera performances. Magnification power below 5x is usually desired in these circumstances in order to minimize image shake and maintain a large enough field of view. A magnification of 3x is normally recommended. The design of many modern opera glasses of the ornamental variety is based on the popular lorgnettes of the nineteenth century

Opera Glass

Opera glasses, also known as theater binoculars or Galilean binoculars, they are compact, low power…

A couch is a generic term in North America and Australia, for an item of furniture designed to seat more than one person. Typically it will have an armrest on either side. Couches are normally found in the family room, living room, den or the lounge. They are covered in a variety of textiles or in leather.

Front View of a Settee

A couch is a generic term in North America and Australia, for an item of furniture designed to seat…

The most common types of couches are the loveseat and the settee or sofa.

Side View of a Settee

The most common types of couches are the loveseat and the settee or sofa.

This pavilion is a free standing structure located near a main building or residence. Since this pavilion was built to take advantage of the view it may also be called a Gazebo.

Folding Pavilion Structure

This pavilion is a free standing structure located near a main building or residence. Since this pavilion…

This candlestick is used to hold a single candle in place. Candles and candlesticks are frequently used in religious rituals and for spiritual means.

Front View of a Candlestick

This candlestick is used to hold a single candle in place. Candles and candlesticks are frequently used…

"The pyramid be revolved about an axis perpendicular to V, the front view will be unchanged and may be copied in the new position distance from the ground line to any point in the top view be unchanged, hence the new top view may be found by projecting up from the front view and across from the original top view" —French, 1911

Revolution About Axis Perpendicular to V

"The pyramid be revolved about an axis perpendicular to V, the front view will be unchanged and may…

"The pyramid be revolved about an axis perpendicular to V, the front view will be unchanged and may be copied in the new position distance from the ground line to any point in the top view be unchanged, hence the new top view may be found by projecting up from the front view and across from the original top view" —French, 1911

Revolution About Axis Forward or Back

"The pyramid be revolved about an axis perpendicular to V, the front view will be unchanged and may…

A system for manual delivery of mail to a series of recipients includes a stack of mail holders each comprising a front flap, a back flap and a central fold.

Mail Bag Delivering Machine

A system for manual delivery of mail to a series of recipients includes a stack of mail holders each…

This lawn mower called the cylinder in many countries, features a fixed horizontal cutting blade at the desired height of cut. Over this is a fast spinning reel of blades which force the grass past the cutting bar. Each blade in the reel forms a helix around the reel axis, and the set of spinning blades describes a cylinder.

Early Design Lawn Mower

This lawn mower called the cylinder in many countries, features a fixed horizontal cutting blade at…

A wheel is a circular device that is capable of rotating on its axis, facilitating movement and transportation.

Side View of a Vehicle Wheel

A wheel is a circular device that is capable of rotating on its axis, facilitating movement and transportation.

The illustration shows the cylinder rolled out in a tangent plane of the base to create a development of the solid.

Development of Cylinder

The illustration shows the cylinder rolled out in a tangent plane of the base to create a development…

An illustration in flattening the sphere using Gore method by creating cylinder sections with equal diameters.

Development of Sphere Gore Method

An illustration in flattening the sphere using Gore method by creating cylinder sections with equal…

"An oblique cone connecting two parallel pipes of different diameters... the true size of the base is not given in the top view and must be revolved until parallel to H."—French, 1911

Oblique Cone by Triangulation Connecting to Two Parallel Pipes of Different Diameters

"An oblique cone connecting two parallel pipes of different diameters... the true size of the base is…

By about 1910, the mechanical typewriter had reached a somewhat standardized design. There were minor variations from one manufacturer to another, but most type writers followed the concept that each key was attached to a type bar that had the corresponding letter molded, in reverse, into its striking head. To have letters typed in exact location, the type bar was guided all its way till the ribbon by segment. When a key was struck briskly and firmly, the type bar hit a ribbon stretched in front of a cylindrical platen that moved back and forth. The paper was rolled around by the type writers platen, which was then rotated by the carriage return lever into position for each new line of text.

Type Writing Machine

By about 1910, the mechanical typewriter had reached a somewhat standardized design. There were minor…

A child cradle, stroller or baby carrier consists of devices for transporting and carrying infants. A "child carrier" or "baby carrier" is a device used to carry an infant or small child on the body of an adult. Such on-the-body carriers are designed in various forms such as baby slings, backpack carriers, and soft front or hip carriers, with varying materials and degrees of rigidity, decoration, support and confinement of the child.

Multiple Purpose Child Cradle

A child cradle, stroller or baby carrier consists of devices for transporting and carrying infants.…

"The intersection of two cylinders might represent a dome on a boiler. If the top view of cylinder A is divided into a number of equal parts the points will represent the top views of elements."—French, 1911

Intersection of Two Cylinders

"The intersection of two cylinders might represent a dome on a boiler. If the top view of cylinder A…

"If the cylinder A were to be developed a right section as at S—S would have to be taken, whose stretchout would be a straight line. If the cutting planes were taken at uniform distances apart, or at random, the elements would not be spaced uniformly on the stretchout but would be found as they project on the turned section of S—S." —French, 1911

Two Cylinders with Axes Not Intersecting

"If the cylinder A were to be developed a right section as at S—S would have to be taken, whose…

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the cone and parallel to the cylinder; or by cutting circles from the right cone perpendicular to the axes.

Intersection of Cylinder and Cone

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the…

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the cone and parallel to the cylinder; or by cutting circles from the right cone perpendicular to the axes.

Intersection of Cylinder and Cone

An illustration of finding an intersection of a cone and cylinder by either cutting the vertex of the…

"A series of planes as S—S are passed perpendicular to the axis of revolution, cutting out the circles shown on the end view. The points at which these circles cut the 'flat' are projected back as points on the curve." —French, 1911

Intersection of Surface of Revolution and Plane

"A series of planes as S—S are passed perpendicular to the axis of revolution, cutting out the…

A jack is mechanical device used to lift heavy loads or apply great forces. Jacks employ a screw thread or hydraulic cylinder to apply very high linear forces. A mechanical jack is a device which lifts heavy equipment. The most common form is a car jack, floor jack, or garage jack which lifts vehicles so that maintenance can be performed.

Jack Device Used for Lifting Objects

A jack is mechanical device used to lift heavy loads or apply great forces. Jacks employ a screw thread…

An exercise problem in creating a development or rolled out surface of a cylinder in a 4" by 5" drawing area.

Development Exercise of Cylinder

An exercise problem in creating a development or rolled out surface of a cylinder in a 4" by 5" drawing…

The exercise problem of creating a three piece elbow development or rolled out image of the cylinder using projections or with dividers.

Development Exercise of Cylinder using Three Piece Elbow

The exercise problem of creating a three piece elbow development or rolled out image of the cylinder…

A pentagonal pyramid problem exercise to complete the top view of the image, and development, or rolled out image, of the pyramid.

Development Exercise of Pentagonal Pyramid

A pentagonal pyramid problem exercise to complete the top view of the image, and development, or rolled…

The problem exercise in completing the top view and creating the development, or rolled out, image of the pentagonal pyramid.

Development Exercise of Pentagonal Pyramid

The problem exercise in completing the top view and creating the development, or rolled out, image of…

In American practice all of the forces between the locomotive and cars are handled through the coupler and its associated draft gear, which allows some limited slack movement. Small dimples called "poling pockets" at the front and rear corners of the locomotive allowed cars to be pushed on an adjacent track using a pole braced between the locomotive and the cars.

Device for Controlling Draft in Locomotives

In American practice all of the forces between the locomotive and cars are handled through the coupler…

A violin is constructed with its sounding box formed with a concave bottom surface to fit against the shoulder of the violinist and with a hook on its top surface that can be attached to a band around the violinist's body. In addition, the violin is formed in a pear shape with a longer neck section than in the classical violin. Thereby, the violinist can play the instrument without supporting it under the chin, and achieve full range of fingering without interference from the front edge of the sounding box.

Violin Body

A violin is constructed with its sounding box formed with a concave bottom surface to fit against the…

To monitor breathing gas pressure in the diving cylinder, a diving regulator usually has a high pressure hose leading to a contents gauge (also called pressure gauge). The port for this hose leaves the first-stage upstream of all pressure-reducing valves. The contents gauge is a pressure gauge measuring the gas pressure in the diving cylinder so the diver knows how much gas remains in the cylinder. It is also known as submersible pressure gauge or SPG.

Pressure Variation Indicator

To monitor breathing gas pressure in the diving cylinder, a diving regulator usually has a high pressure…

A headlamp is a lamp, usually attached to the front of a vehicle such as a car, with the purpose of illuminating the road ahead during periods of low visibility, such as darkness precipitation. Headlamp performance has steadily improved throughout the automobile age, spurred by the great disparity between daytime and night time traffic fatalities.

Vehicle Headlight

A headlamp is a lamp, usually attached to the front of a vehicle such as a car, with the purpose of…

A headlamp is attached to the front of a bicycle while illuminating the road ahead specially when there is low visibility.

Bicycle Lamp

A headlamp is attached to the front of a bicycle while illuminating the road ahead specially when there…

A kitchen cabinet is a type of cupboard popular in the first decades of the twentieth century. Named after the Hoosier Manufacturing Co. of New Castle, Indiana, they were also made by several other companies, most also located in Indiana.

Perspective View of Kitchen Cabinet

A kitchen cabinet is a type of cupboard popular in the first decades of the twentieth century. Named…

A cabinet is usually a box-shaped piece of furniture, either standing alone or built into or, like a medicine cabinet, attached to a wall. It is typically made of wood or, now increasingly, of synthetic materials, and used for storage of miscellaneous items.

Front View of Kitchen Cabinet

A cabinet is usually a box-shaped piece of furniture, either standing alone or built into or, like a…

Among the early velocipedes there were designs with one, two, three and four wheels. Some two-wheeled designs had pedals mounted on the front wheel, while three- and four-wheeled designs sometimes used treadles and levers to drive the rear wheels.

Marine Velocipede

Among the early velocipedes there were designs with one, two, three and four wheels. Some two-wheeled…

A chair is a raised surface used to sit on, commonly for use by one person. Chairs often have the seat raised above floor level, supported by four legs. A chair without a back or arm rests is a stool, or when raised up, a bar stool.

Side View of a Chair

A chair is a raised surface used to sit on, commonly for use by one person. Chairs often have the seat…